CN108656933A - The dynamical system and electricity-generating control method and hybrid vehicle of hybrid vehicle - Google Patents

The dynamical system and electricity-generating control method and hybrid vehicle of hybrid vehicle Download PDF

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Publication number
CN108656933A
CN108656933A CN201710211540.8A CN201710211540A CN108656933A CN 108656933 A CN108656933 A CN 108656933A CN 201710211540 A CN201710211540 A CN 201710211540A CN 108656933 A CN108656933 A CN 108656933A
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China
Prior art keywords
power
vehicle
engine
motor
hybrid vehicle
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Granted
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CN201710211540.8A
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Chinese (zh)
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CN108656933B (en
Inventor
陈新立
王春生
彭勃
李加林
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BYD Co Ltd
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BYD Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a kind of hybrid vehicle and its dynamical system and electricity-generating control method, dynamical system includes：Engine outputs power to the wheel of hybrid vehicle by clutch；Power motor is used to output driving force to the wheel of hybrid vehicle；Power battery is used to power to power motor；DC DC converters；Auxiliary-motor is connected with engine, power motor, DC DC converters and power battery respectively, generates electricity under the drive of engine；Control module, it is used to obtain the SOC value of power battery and the speed of hybrid vehicle, and the generated output of auxiliary-motor is controlled according to the SOC value of power battery and the speed of hybrid vehicle, and the generated output that engine is obtained according to the generated output of auxiliary-motor operates in preset optimal economic region to control engine, so as to reduce the oil consumption of engine, the economy of vehicle operation is improved, while being able to maintain that vehicle low speed electric equilibrium and low speed ride comfort, promotes vehicle performance.

Description

The dynamical system and electricity-generating control method and hybrid vehicle of hybrid vehicle
Technical field
The present invention relates to automobile technical field, more particularly to a kind of dynamical system of hybrid vehicle, a kind of mixing are dynamic Power automobile, a kind of electricity-generating control method of hybrid vehicle and a kind of computer readable storage medium.
Background technology
With the continuous consumption of the energy, the development and utilization of new energy vehicle has been increasingly becoming a kind of trend.Hybrid power Automobile is driven as one kind in new energy vehicle by engine and/or motor.
But in the related art, the dynamotor of hybrid vehicle acts also as while serving as driving motor Generator, so when causing to run at a low speed dynamotor rotating speed it is relatively low, and the generated output of dynamotor and power generation are imitated Rate is also very low, and to cannot be satisfied the power demand run at a low speed, vehicle maintains low speed electric equilibrium relatively difficult.
Therefore, the relevant technologies needs are improved.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention First purpose is to propose a kind of dynamical system of hybrid vehicle, it can be achieved that vehicle low speed electric equilibrium.
Second object of the present invention is to propose a kind of hybrid vehicle.Third object of the present invention is to propose A kind of electricity-generating control method of hybrid vehicle.Fourth object of the present invention is to propose a kind of computer-readable storage medium Matter.
In order to achieve the above objectives, a kind of dynamical system for hybrid vehicle that first aspect present invention embodiment proposes, Including：Engine, the engine output power to the wheel of the hybrid vehicle by clutch；Power motor, The power motor is used to output driving force to the wheel of the hybrid vehicle；Power battery, the power battery are used for It powers to the power motor；DC-DC converter；The auxiliary-motor being connected with the engine, the auxiliary-motor respectively with it is described Power motor, the DC-DC converter are connected with power battery, and the auxiliary-motor is sent out under the drive of the engine Electricity；Control module, the control module are used to obtain the speed of the SOC value and the hybrid vehicle of the power battery, And the generated output of the auxiliary-motor is controlled according to the speed of the SOC value of the power battery and the hybrid vehicle, with And the generated output of the engine obtained according to the generated output of the auxiliary-motor with control the engine operate in it is default Optimal economic region.
The dynamical system of the hybrid vehicle proposed according to embodiments of the present invention, engine are defeated by power by clutch Go out the wheel to hybrid vehicle, power motor outputs driving force to the wheel of hybrid vehicle, and power battery is to power Motor is powered, and auxiliary-motor generates electricity under the drive of engine, and control module obtains the SOC value and hybrid power of power battery The speed of automobile, and according to the generated output of the SOC value of power battery and the speed of hybrid vehicle control auxiliary-motor, and The generated output that engine is obtained according to the generated output of auxiliary-motor operates in preset optimal economic region to control engine, So as to maintain vehicle low speed electric equilibrium and low speed ride comfort, vehicle performance is promoted.
In order to achieve the above objectives, a kind of hybrid vehicle that second aspect of the present invention embodiment proposes, including it is described The dynamical system of hybrid vehicle.
The hybrid vehicle proposed according to embodiments of the present invention passes through the dynamical system of above-mentioned hybrid vehicle, energy Vehicle low speed electric equilibrium and low speed ride comfort are enough maintained, vehicle performance is promoted.
In order to achieve the above objectives, a kind of Generation Control side for hybrid vehicle that third aspect present invention embodiment proposes Method includes the following steps：Obtain the vehicle of the SOC value and the hybrid vehicle of the power battery of the hybrid vehicle Speed；The pair electricity of the hybrid vehicle is controlled according to the speed of the SOC value of the power battery and the hybrid vehicle The generated output of machine；The generated output of the engine of the hybrid vehicle is obtained according to the generated output of the auxiliary-motor, Preset optimal economic region is operated in control the engine, wherein the auxiliary-motor is under the drive of the engine It generates electricity.
The electricity-generating control method of hybrid vehicle according to the ... of the embodiment of the present invention first obtains the power of hybrid vehicle The SOC value of battery and the speed of hybrid vehicle control mixed according to the SOC value of power battery and the speed of hybrid vehicle The generated output of the auxiliary-motor of power vehicle is closed, and according to the engine of the generated output of auxiliary-motor acquisition hybrid vehicle Generated output operates in preset optimal economic region, wherein auxiliary-motor carries out under the drive of engine to control engine Power generation promotes vehicle performance so as to maintain vehicle low speed electric equilibrium and low speed ride comfort.
In order to achieve the above objectives, a kind of computer readable storage medium that fourth aspect present invention embodiment proposes, has It is stored in instruction therein, when executed, the hybrid vehicle executes the electricity-generating control method.
Computer readable storage medium according to the ... of the embodiment of the present invention has and is stored in instruction therein, works as hybrid power When the processor of automobile executes the instruction, hybrid vehicle executes above-mentioned electricity-generating control method, so as to maintain vehicle low Fast electric equilibrium and low speed ride comfort promote vehicle performance.
Description of the drawings
Fig. 1 is the block diagram of the dynamical system of hybrid vehicle according to the ... of the embodiment of the present invention；
Fig. 1 a are universal characteristic curve of engine schematic diagrames according to the ... of the embodiment of the present invention；
Fig. 2 a are the structural schematic diagrams of the dynamical system of hybrid vehicle according to an embodiment of the invention；
Fig. 2 b are the structural schematic diagrams of the dynamical system of hybrid vehicle in accordance with another embodiment of the present invention；
Fig. 3 is the block diagram of the dynamical system of hybrid vehicle according to an embodiment of the invention；
Fig. 4 is the schematic diagram of the drive mechanism between engine according to an embodiment of the invention and corresponding wheel；
Fig. 5 is the schematic diagram of the drive mechanism between engine in accordance with another embodiment of the present invention and corresponding wheel；
Fig. 6 is the block diagram of hybrid vehicle according to the ... of the embodiment of the present invention；
Fig. 7 is the flow chart of the electricity-generating control method of hybrid vehicle according to the ... of the embodiment of the present invention；
Fig. 8 is the flow chart of the electricity-generating control method of hybrid vehicle according to an embodiment of the invention；
Fig. 9 is the flow chart of the electricity-generating control method of hybrid vehicle in accordance with another embodiment of the present invention；
Figure 10 is the flow chart of the electricity-generating control method of hybrid vehicle in accordance with another embodiment of the present invention；
Figure 11 is the flow chart of the electricity-generating control method of hybrid vehicle in accordance with another embodiment of the present invention；And
Figure 12 is the flow chart of the electricity-generating control method of hybrid vehicle accord to a specific embodiment of that present invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The dynamical system of the hybrid vehicle of first aspect present invention embodiment proposition is described below with reference to Fig. 1-5, The dynamical system provides sufficient power and electric energy for hybrid vehicle normally travel.
Fig. 1 is the block diagram of the dynamical system of hybrid vehicle according to the ... of the embodiment of the present invention.As shown in Figure 1, The dynamical system of the hybrid vehicle includes：Engine 1, power motor 2, power battery 3, DC-DC converter 4, auxiliary-motor 5 With control module 101.
A specific embodiment according to the present invention, hybrid vehicle can be PHEV (Plug-in Hybrid Electric Vehicle, plug-in hybrid-power automobile).
In conjunction with shown in Fig. 1 to Fig. 3, engine 1 outputs power to the wheel 7 of hybrid vehicle by clutch 6；It is dynamic Force motor 2 is used to output driving force to the wheel 7 of hybrid vehicle.That is, the dynamical system of the embodiment of the present invention can By engine 1 and/or power motor 2 power is provided for hybrid vehicle normally travel.In some embodiments of the present invention In, the power source of dynamical system can be engine 1 and power motor 2, that is to say, that appointing in engine 1 and power motor 2 One can individually export power to wheel 7, alternatively, engine 1 and power motor 2 can also export power to wheel 7 simultaneously.
Power battery 3 is used to power to power motor 2；Auxiliary-motor 5 is connected with engine 1, for example, auxiliary-motor 5 can pass through The train end of engine 1 is connected with engine 1, auxiliary-motor 5 respectively with 3 phase of power motor 2, DC-DC converter 4 and power battery Even, when auxiliary-motor 5 is generated electricity under the drive of engine 1 with realize charging to power battery 3, to power motor 2 power supply, to At least one of power supply of DC-DC converter 4.In other words, engine 1 can drive auxiliary-motor 5 to generate electricity, the electricity that auxiliary-motor 5 generates It can be provided at least one of power battery 3, power motor 2 and DC-DC converter 4.It should be understood that engine 1 Auxiliary-motor 5 can be driven to generate electricity while exporting power to wheel 7, auxiliary-motor 5 also can individually be driven to generate electricity.
Power motor 2 and auxiliary-motor 5 correspond respectively as a result, serves as driving motor and generator, pair when due to low speed Motor 5 has higher generated output and generating efficiency, can meet the power demand run at a low speed, maintains vehicle low speed level Weighing apparatus maintains low speed ride comfort, promotes the power performance of vehicle.
In some embodiments, auxiliary-motor 5 can be BSG (Belt-driven Starter Generator, belt transmission Startup/generating integrated motor) motor.It should be noted that auxiliary-motor 5 belongs to high-voltage motor, such as the power generation electricity of auxiliary-motor 5 Pressure is suitable with the voltage of power battery 3, to which the electric energy that auxiliary-motor 5 generates can be without voltage transformation directly to power battery 3 Charging can also power directly to power motor 2 and/or DC-DC converter 4.And auxiliary-motor 5 also belongs to high efficiency generator, example It drives the power generation of auxiliary-motor 5 that 97% or more generating efficiency can be realized such as under 1 idling speed of engine, improves normal power generation Efficiency.
In addition, in some embodiments of the invention, auxiliary-motor 5 can be used for starting engine 1, i.e. auxiliary-motor 5 can be realized Start the function of engine 1, such as when starting engine 1, auxiliary-motor 5 can drive the crank rotation of engine 1, so as to start The piston of machine 1 reaches ignition location, and to realize the startup of engine 1, thus auxiliary-motor 5 can realize starter motor in the related technology Function.
As described above, engine 1 and power motor 2 are used equally for the wheel 7 of driving hybrid vehicle.For example, as schemed Shown in 2a, same wheel such as a pair of of a front-wheel 71 (including left side for engine 1 and power motor 2 driving hybrid vehicle jointly Front-wheel and off-front wheel)；For another example, as shown in Figure 2 b, engine 1 can drive for example a pair of of front-wheel of the first wheel of hybrid vehicle 71 (including the near front wheel and off-front wheels), power motor 2 can driving force to hybrid vehicle the second wheel such as a pair of rear wheels 72 (including left rear wheel and off hind wheels).
In other words, when engine 1 and power motor 2 driving a pair of front-wheel 71 jointly, the driving force of dynamical system is defeated Go out to a pair of of front-wheel 71, the type of drive of two drives can be used in vehicle；When engine 1 drives a pair of of front-wheel 71 and the drive of power motor 2 When dynamic a pair of rear wheels 72, the driving force of dynamical system is exported respectively to a pair of of front-wheel 71 and a pair of rear wheels 72, and vehicle can be used four The type of drive of drive.
Further, when engine 1 and power motor 2 drive same wheel jointly, in conjunction with shown in Fig. 2 a, hybrid power The dynamical system of automobile further includes main reducing gear 8 and speed changer 90, wherein engine 1 by clutch 6, speed changer 90 and Main reducing gear 8 outputs power to for example a pair of of front-wheel 71 of the first wheel of hybrid vehicle, and power motor 2 passes through main deceleration Device 8 outputs driving force to the first wheel such as a pair of front-wheel 71 of hybrid vehicle.Wherein, clutch 6 can with speed changer 90 It is integrally disposed.
When engine 1 drives the first wheel and power motor 2 drives the second wheel, in conjunction with shown in Fig. 2 b, hybrid power The dynamical system of automobile further includes the first speed changer 91 and the second speed changer 92, wherein engine 1 passes through clutch 6 and first Speed changer 91 outputs power to for example a pair of of front-wheel 71 of the first wheel of hybrid vehicle, and power motor 2 becomes by second Fast device 92 outputs driving force to the second wheel such as a pair of rear wheels 72 of hybrid vehicle.Wherein, clutch 6 and the first speed change Device 91 can be integrally disposed.
Further, in some embodiments of the invention, as shown in Figure 1 to Figure 3, auxiliary-motor 5 further includes the first control Device 51, power motor 2 further include second controller 21, and auxiliary-motor 5 is connected respectively to 3 He of power battery by the first controller 51 The DC-DC converter 4, and power motor 2 is connected to by the first controller 51 and second controller 21.
Specifically, the first controller 51 is connected with second controller 21, power battery 3 and DC-DC converter 4 respectively, First controller 51 can have AC-DC converter units, auxiliary-motor 5 that can generate alternating current when generating electricity, and AC-DC converter units can will be high The convert alternating current that the power generation of Medium-voltage Motor 2 generates is high voltage direct current such as 600V high voltage direct currents, is filled to power battery 3 with realizing Electricity is powered to power motor 2, at least one of power supply of DC-DC converter 4.
Similarly, second controller 21 can have DC-AC converter units, the first controller 51 that auxiliary-motor 5 can generate electricity and produce Raw convert alternating current is high voltage direct current, and the first controller 51 can be become the high voltage direct current to swap out by DC-AC converter units again It is transformed to alternating current, to give power motor 2 to power.
In other words, as shown in figure 3, when auxiliary-motor 5 is generated electricity, auxiliary-motor 5 can give power by the first controller 51 Battery 3 charges and/or powers to DC-DC converter 4.In addition, auxiliary-motor 5 can also pass through the first controller 51 and second controller 21 power to power motor 2.
Further, as shown in Figure 1 to Figure 3, DC-DC converter 4 is also connected with power battery 3.DC-DC converter 4 is also It is connected with power motor 2 by second controller 21.
In some embodiments, as shown in figure 3, there is the first controller 51 first DC terminal DC1, second controller 21 to have There is the second DC terminal DC2, DC-DC converter 4 has a third DC terminal DC3, and the third DC terminal DC3 of DC-DC converter 4 can be with First DC terminal DC1 of the first controller 51 is connected, with the high straightening to the first controller 51 by the first DC terminal DC1 outputs Galvanic electricity carries out DC-DC transformation.Also, the third DC terminal DC3 of DC-DC converter 4 can also be connected with power battery 3, Jin Er First DC terminal DC1 of one controller 51 can be connected with power battery 3, so that the first controller 51 passes through the first DC terminal DC1 Output high voltage direct current is to power battery 3 to give power battery 3 to charge.Further, the third DC terminal of DC-DC converter 4 DC3 can also be connected with the second DC terminal DC2 of second controller 21, and then the first DC terminal DC1 of the first controller 51 can be with Second DC terminal DC2 of second controller 21 is connected, so that the first controller 51 exports high voltage direct current by the first DC terminal DC1 Electricity is to second controller 21 to give power motor 2 to power.
Further, as shown in figure 3, DC-DC converter 4 also respectively with the first electrical equipment 10 in hybrid vehicle It is connected with low tension battery 20 with to the first electrical equipment 10 and the power supply of low tension battery 20, and low tension battery 20 is also with first Electrical equipment 10 is connected.
In some embodiments, as shown in figure 3, DC-DC converter 4 also has the 4th DC terminal DC4, DC-DC converter 4 The high voltage direct current and/or auxiliary-motor 5 that power battery 3 exports can be converted by the high voltage direct current that the first controller 51 exports For low-voltage DC, and the low-voltage DC is exported by the 4th DC terminal DC4.Further, the 4th of DC-DC converter 4 DC terminal DC4 can be connected with the first electrical equipment 10, to give the first electrical equipment 10 to power, wherein the first electrical equipment 10 can For low voltage equipment, including but not limited to car light, radio etc..4th DC terminal DC4 of DC-DC converter 4 can also with it is low Accumulator 20 is pressed to be connected, to give low tension battery 20 to charge.
Also, low tension battery 20 is connected with the first electrical equipment 10, to give the first electrical equipment 10 to power, particularly, When auxiliary-motor 5 stops power generation and 3 failure of power battery or not enough power supply, low tension battery 20 can be that the first electrical equipment 10 supplies Electricity, to ensure the low pressure electricity consumption of vehicle, it is ensured that vehicle can realize pure fuel oil pattern traveling, improve vehicle mileage travelled.
As described above, the third DC terminal DC3 of DC-DC converter 4 is connected with the first controller 51, DC-DC converter 4 4th DC terminal DC4 is connected with the first electrical equipment 10 and low tension battery 20 respectively, when power motor 2, second controller 21 When breaking down with power battery 3, auxiliary-motor 5 can generate electricity with by the first controller 51 and DC-DC converter 4 to first Electrical equipment 10 powers and/or charges to low tension battery 20, so that hybrid vehicle is travelled with pure fuel oil pattern.
In other words, when power motor 2, second controller 21 and power battery 3 break down, the first controller 51 can incite somebody to action The convert alternating current that the power generation of auxiliary-motor 5 generates is high voltage direct current, what DC-DC converter 4 can swap out the change of the first controller 50 High voltage direct current is transformed to low-voltage DC, to give the first electrical equipment 10 to power and/or charge to low tension battery 20.
Auxiliary-motor 5 and DC-DC converter 4 have independent supplying channels all the way as a result, when power motor 2, second controller 21 When breaking down with power battery 3, electric drive is cannot achieve, passes through the independent confession of auxiliary-motor 5 and DC-DC converter 4 at this time Electric channel, it is ensured that the low pressure electricity consumption of vehicle, it is ensured that vehicle can realize pure fuel oil pattern traveling, improve vehicle mileage travelled.
Further combined with the embodiment of Fig. 3, the first controller 51, second controller 21 and power battery 3 also respectively with it is mixed The second electrical equipment 30 closed in power vehicle is connected.
In some embodiments, as shown in figure 3, the first DC terminal DC1 of the first controller 51 can be with the second electrical equipment 30 are connected, and when auxiliary-motor 5 is generated electricity, auxiliary-motor 5 can be powered by the first controller 51 directly to the second electrical equipment 30. In other words, the convert alternating current that the AC-DC converter units of the first controller 51 can also generate the power generation of auxiliary-motor 5 is high voltage direct current Electricity, and power directly to the second electrical equipment 30.
Similarly, power battery 3 can also be connected with the second electrical equipment 30, to give the second electrical equipment 30 to power.In other words, The high voltage direct current that power battery 3 exports can directly feed the second electrical equipment 30.
Wherein, the second electrical equipment 30 can be high-voltage electrical equipment, it may include but it is not limited to compressor of air conditioner, PTC (Positive Temperature Coefficient, positive temperature coefficient) heater etc..
As described above, generated electricity by auxiliary-motor 5, it can be achieved that be power battery 3 charging or be power motor 2 power supply or be First electrical equipment 10 and the power supply of the second electrical equipment 30.Also, power battery 3 can be power motor by second controller 21 2 power supplies, or power for the second electrical equipment 30, also can be that the first electrical equipment 10 and/or low pressure are stored by DC-DC converter 4 Battery 20 is powered.Thus vehicle power supply mode is enriched, meets power demand of the vehicle under different operating modes, improves vehicle Performance.
It should be noted that in embodiments of the present invention, low pressure can refer to the voltage of 12V (volt) or 24V, high pressure can refer to 600V Voltage, but not limited to this.
A specific embodiment of the dynamical system of hybrid vehicle is described in detail with reference to Fig. 4, the embodiment is suitable Drive the dynamical system of same wheel, i.e. two driving mixed power automobiles jointly for engine 1 and power motor 2.It needs to illustrate , which mainly describes a kind of specific drive mechanism between engine 1, power motor 2 and wheel 7, especially schemes The structure of speed changer 90 in 2a, the embodiment of rest part and Fig. 1 and Fig. 3 is essentially identical, is no longer described in detail here.
It should also be noted that, multiple input axis, multiple output shafts and motor power axis 931 in following example and each Associated gear and shifting element etc. can be used to constitute the speed changer 90 in Fig. 2 a on axis.
In some embodiments, shown in as shown in Figure 1, Figure 3 and Figure 4, the dynamical system of hybrid vehicle includes mainly starting Machine 1, power motor 2, power battery 3, DC-DC converter 4, auxiliary-motor 5, multiple input axis are (for example, the first input shaft 911, Two input shafts 912), multiple output shafts (for example, the first output shaft 921, second output shaft 922) and motor power axis 931 and each Associated gear and shifting element (e.g., synchronizer) on axis.
As shown in figure 4, engine 1 outputs power to mixing by the double clutch 2d in clutch 6 such as Fig. 4 examples The wheel 7 of power vehicle.When being transmitted into action edge between engine 1 and input shaft, engine 1 is arranged to pass through double clutch 2d is selectively engageable at least one of multiple input axis.In other words, when engine 1 transmits power to input shaft, hair Motivation 1 can be engaged selectively with one in multiple input axis can also be selectively to transmit power or engine 1 It is simultaneously engaged with two or more input shafts in multiple input axis to transmit power.
For example, in the example of fig. 4, multiple input axis may include the first input shaft 911 and the second input shaft 912 two Input shaft, the second input shaft 912 can be coaxially set on the first input shaft 911, and engine 1 can be selected by double clutch 2d Engaged with one in the first input shaft 911 and the second input shaft 912 to transmit power to selecting property.Alternatively, particularly, engine 1 can also simultaneously engage with the first input shaft 911 and the second input shaft 912 to transmit power.However, it is to be understood that starting Machine 1 can also be disconnected with the first input shaft 911 and the second input shaft 912 simultaneously.
Multiple output shafts may include 922 two output shafts of the first output shaft 921 and the second output shaft, the first output shaft 921 and second output shaft 922 be arranged in parallel with the first input shaft 911.
It can be driven by shift gear pair between input shaft and output shaft.For example, being respectively provided on each input shaft There is gear driving gear, is provided with gear on each input shaft in the first input shaft 911 and the second input shaft 912 in other words actively Gear is both provided with gear driven gear on each output shaft, every in the first output shaft 921 and the second output shaft 922 in other words Gear driven gear is provided on a output shaft, gear driven gear is accordingly engaged with gear driving gear, more to constitute The gear pair different to speed ratio.
In some embodiments of the invention, the transmission of six gears may be used between input shaft and output shaft, that is, there is a gear Gear pair, second gear are secondary, three keep off gear pairs, four gear gear pairs, five gear gear pairs and six gear gear pairs.But the present invention is simultaneously It is without being limited thereto, for the ordinary skill in the art, can according to transmission need and adaptability increases or decreases gear The number of gear pair, however it is not limited to six gear transmission shown in the embodiment of the present invention.
As shown in figure 4, be arranged to can be with multiple output shafts (for example, the first output shaft 921, second is defeated for motor power axis 931 Shaft 922) in one link, linked with one in output shaft by motor power axis 931, to dynamic Power can be transmitted between one in motor power axis 931 and output shaft.For example, the power through the output shaft is (such as The power exported from engine 1) motor power axis 931 is may be output to, or the power through motor power axis 931 (such as comes from The power that power motor 2 exports) it also may be output to the output shaft.
It should be noted that above-mentioned " linkage " can be understood as multiple components (for example, two) coupled movements, with two For component linkage, wherein when a component movement, another component also moves therewith.
For example, in some embodiments of the invention, gear and axis linkage can be understood as when gear rotates and it The axis of linkage also will rotation, or when the axis rotate, the gear that links with it will also rotate.
For another example, when the linkage of axis and axis can be understood as that an axis rotates wherein, another axis linking with it also general Rotation.
For another example, link when gear and gear-linked can be understood as that a gear rotates wherein, with it another Gear also will rotation.
In the description in relation to " linkage " below the present invention, if without specified otherwise, it is understood in this way.
Similarly, power motor 2 is arranged to link with motor power axis 931, for example, power motor 2 can will generate Power output to motor power axis 931, to output driving force to the wheel of hybrid vehicle by motor power axis 931 7。
Need explanation a bit, in the description of the present invention, motor power axis 931 can be the motor of itself of power motor 2 Axis.It is, of course, understood that motor power axis 931 and the motor shaft of power motor 2 can also be two individual axis.
In some embodiments, as shown in figure 4, output section 221 is with respect to one (for example, second is defeated in output shaft Shaft 922) can differential rotation, in other words, output section 221 can independently be rotated from the output shaft with different rotating speeds.
Further, output section 221 is arranged to be selectively engageable one with same with the output shaft in output shaft Step rotation, in other words, output section 221 being capable of differential rotation or synchronous rotations relative to the output shaft.In short, 221 phase of output section The one of output shaft is engageable to rotate synchronously, can also disconnect and be rotated with differential certainly.
As shown in figure 4, the output section 221 empty can be set on one in output shaft, but not limited to this.Example As in the example of fig. 4,221 empty set of output section is on the second output shaft 922, i.e. 922 energy of output section 221 and the second output shaft It is enough to be rotated with different rotating speed differentials.
As described above, output section 221 can with one synchronous rotation of output shaft, for example, can be by adding correspondence Synchronizer be achieved as desired by the synchronous effect of output section 221 and the output shaft.The synchronizer can be output section synchronizer 221c, output section synchronizer 221c are arranged for one in synchronism output portion 221 and output shaft.
In some embodiments, power motor 2 is used to output driving force to the wheel 7 of hybrid vehicle, 1 He of engine Power motor 2 drives the same wheel of hybrid vehicle jointly.In conjunction with the example of Fig. 4, the differential mechanism 75 of vehicle can be arranged Between a pair of of front-wheel 71 or between a pair of rear wheels 72, in some examples of the present invention, before a pair that power motor 2 drives When taking turns 71, differential mechanism 75 can be located between a pair of of front-wheel 71.
The function of differential mechanism 75 be when turn inside diameter travel or on uneven road surface when driving, make driving wheels with not Same angular speed rolls, to ensure to make PURE ROLLING between two side drive wheels and ground.Main reducing gear 8 is provided on differential mechanism 75 Main reducing gear driven gear 74, such as main reducing gear driven gear 74 can be arranged on the shell of differential mechanism 75.Main deceleration Device driven gear 74 can be bevel gear, but not limited to this.
In some embodiments, as shown in Figure 1, power battery 3 is used to power to power motor 2；Auxiliary-motor 5 and engine 1 is connected, and auxiliary-motor 5 is also connected with power motor 2, DC-DC converter 4 and power battery 3 respectively, and auxiliary-motor 5 is in engine 1 Realized when being generated electricity under drive to power battery 3 charging, to power motor 2 power supply, to DC-DC converter 4 power in extremely It is one few.
Another specific embodiment of the dynamical system of hybrid vehicle, the implementation is described in detail in conjunction with Fig. 5 below Example is equally applicable to engine 1 and power motor 2 drives the dynamical system of same wheel, i.e. two driving mixed power automobiles jointly. It should be noted that the embodiment mainly describes a kind of specific drive mechanism between engine 1, power motor 2 and wheel 7, The structure of speed changer 90 in especially Fig. 2 a, the embodiment of rest part and Fig. 1 and Fig. 3 is essentially identical, no longer superfluous in detail here It states.
It should also be noted that, multiple input axis, multiple output shafts and motor power axis 931 in following example and each Associated gear and shifting element etc. can be used to constitute the speed changer 90 in Fig. 2 a on axis.
In some embodiments, as shown in Fig. 1, Fig. 3 and Fig. 5, the dynamical system of hybrid vehicle includes mainly starting Machine 1, power motor 2, power battery 3, DC-DC converter 4, auxiliary-motor 5, multiple input axis are (for example, the first input shaft 911, Two input shafts 912), multiple output shafts (for example, the first output shaft 921, second output shaft 922) and motor power axis 931 and each Associated gear and shifting element (e.g., synchronizer) on axis.
As shown in figure 5, engine 1 outputs power to mixing by the double clutch 2d in clutch 6 such as Fig. 4 examples The wheel 7 of power vehicle.When being transmitted into action edge between engine 1 and input shaft, engine 1 is arranged to pass through double clutch 2d is selectively engageable at least one of multiple input axis.In other words, when engine 1 transmits power to input shaft, hair Motivation 1 can be engaged selectively with one in multiple input axis can also be selectively to transmit power or engine 1 It is simultaneously engaged with two or more input shafts in multiple input axis to transmit power.
For example, in the example of hgure 5, multiple input axis may include the first input shaft 911 and the second input shaft 912 two Input shaft, the second input shaft 912 are coaxially set on the first input shaft 911, and engine 1 can be selected by double clutch 2d Engaged with one in the first input shaft 911 and the second input shaft 912 to transmit power to property.Alternatively, particularly, engine 1 It can also be simultaneously engaged with the first input shaft 911 and the second input shaft 912 to transmit power.However, it is to be understood that engine 1 can also disconnect with the first input shaft 911 and the second input shaft 912 simultaneously.
Multiple output shafts may include 922 two output shafts of the first output shaft 921 and the second output shaft, the first output shaft 921 and second output shaft 922 be arranged in parallel with the first input shaft 911.
It can be driven by shift gear pair between input shaft and output shaft.For example, being respectively provided on each input shaft There is gear driving gear, is provided with gear on each input shaft in the first input shaft 911 and the second input shaft 912 in other words actively Gear is both provided with gear driven gear on each output shaft, every in the first output shaft 921 and the second output shaft 922 in other words Gear driven gear is provided on a output shaft, gear driven gear is accordingly engaged with gear driving gear, more to constitute The gear pair different to speed ratio.
In some embodiments of the invention, the transmission of six gears may be used between input shaft and output shaft, that is, there is a gear Gear pair, second gear are secondary, three keep off gear pairs, four gear gear pairs, five gear gear pairs and six gear gear pairs.But the present invention is simultaneously It is without being limited thereto, for the ordinary skill in the art, can according to transmission need and adaptability increases or decreases gear The number of gear pair, however it is not limited to six gear transmission shown in the embodiment of the present invention.
As shown in figure 5, the overhead set setting in output shaft (such as the first output shaft 921 and second output shaft 922) There is at least one reverse output gear 81, and is additionally provided on the output shaft same for engaging reversing gear for reverse output gear 81 Device (such as five gear synchronizer 5c, six gear synchronizer 6c) is walked, in other words, reverse gear synchronizer synchronizes corresponding reverse output gear 81 With the output shaft so that output shaft can be rotated synchronously with by the synchronous reverse output gear 81 of reverse gear synchronizer, in turn The power that reverses gear can be exported from the output shaft.
In some embodiments, as shown in figure 5, reverse output gear 81 is one, which can With empty set on the second output shaft 922.But the present invention is not limited thereto, in further embodiments, reverse output gear 81 Can be two, two reverse output gears 81 simultaneously empty set on the second output shaft 922.It is, of course, understood that falling It can also be three or three or more to keep off output gear 81.
Reverse gear shaft 89 is arranged to and a linkage in input shaft (such as the first input shaft 911 and second input shaft 912) And also link at least one reverse output gear 81, for example, can be by falling through the power on one in input shaft Gear shaft 89 and pass to reverse output gear 81, to reverse gear, power can be exported from reverse output gear 81.The present invention's In example, reverse output gear 81 is empty set on the second output shaft 922, and reverse gear shaft 89 is and the first input shaft 911 linkages, such as the power that reverses gear that engine 1 exports can be defeated to reversing gear by being exported after the first input shaft 911, reverse gear shaft 89 Go out gear 81.
Motor power axis 931 is described in detail below.931 overhead of motor power axis set is provided with motor power axis the One gear 31, motor power axis second gear 32.Motor power axis first gear 31 can be engaged with main reducing gear driven gear 74 Transmission, to transmit driving force to the wheel 7 of hybrid vehicle.
Motor power axis second gear 32 is arranged to link with one of gear driven gear, with according to the present invention When the hybrid vehicle of the dynamical system of embodiment is in certain operating modes, the power of power source output can be in motor power axis Transmitted between second gear 32 and the gear driven gear to link with it, at this time motor power axis second gear 32 with should Gear driven gear links.For example, motor power axis second gear 32 and two keeps off driven gear 2b linkages, motor power axis second Gear 32 can be engaged directly or with two gear driven gear 2b by intermediate transmission component indirect drive.
Further, motor power axis synchronizer 33c, motor power axis synchronizer 33c are additionally provided on motor power axis 931 Between motor power axis first gear 31 and motor power axis second gear 32, motor power axis synchronizer 33c can be selected Selecting property motor power axis first gear 31 or motor power axis second gear 32 are engaged with motor power axis 3.Such as in Fig. 5 Example in, the clutch collar of motor power axis synchronizer 33c is moved to the left engageable motor power axis second gear 32, moves right Dynamic then engageable motor power axis first gear 31.
Similarly, power motor 2 is arranged to link with motor power axis 931, for example, power motor 2 can will generate Power output to motor power axis 931, to output driving force to the wheel of hybrid vehicle by motor power axis 931 7。
For motor power axis first gear 31, since it is engaged with main reducing gear driven gear 74, power Motor 2 can by motor power axis synchronizer 33c engages motor power axis first gear 31 by the power of generation directly from electricity Mechanomotive force axis first gear 31 exports, and can shorten transmission chain in this way, reduces intermediate transmission component, improves transmission efficiency.
Secondly motor power axis 931 and the kind of drive of power motor 2 are described in detail in conjunction with specific embodiments.
In some embodiments, as shown in figure 5, being further fixedly arranged on motor power axis third tooth on motor power axis 931 Wheel 33, power motor 2 are arranged to and motor power axis third gear 33 directly engaged transmission or indirect drive.
Further, first motor gear 511 is provided on the motor shaft of power motor 2, during first motor gear 511 passes through Between gear 512 and motor power axis third gear 33 be driven.For another example, power motor 2 can also coaxial phase with motor power axis 931 Even.
In some embodiments, power motor 2 is used to output driving force to the wheel 7 of hybrid vehicle, 1 He of engine Power motor 2 drives the same wheel of hybrid vehicle jointly.In conjunction with the example of Fig. 5, the differential mechanism 75 of vehicle can be arranged Between a pair of of front-wheel 71 or between a pair of rear wheels 72, in some examples of the present invention, before a pair that power motor 2 drives When taking turns 71, differential mechanism 75 can be located between a pair of of front-wheel 71.
The function of differential mechanism 75 be when turn inside diameter travel or on uneven road surface when driving, make driving wheels with not Same angular speed rolls, to ensure to make PURE ROLLING between two side drive wheels and ground.Main reducing gear 8 is provided on differential mechanism 75 Main reducing gear driven gear 74, such as main reducing gear driven gear 74 can be arranged on the shell of differential mechanism 75.Main deceleration Device driven gear 74 can be bevel gear, but not limited to this.
Further, the first output shaft output gear 211, the output of the first output shaft are fixedly installed on the first output shaft 921 Gear 211 is rotated synchronously with the first output shaft 921, and the first output shaft output gear 211 is engaged with main reducing gear driven gear 74 Transmission, to which the power through the first output shaft 921 can be transferred to main reducing gear driven tooth from the first output shaft output gear 211 Wheel 74 and differential mechanism 75.
Similarly, the second output shaft output gear 212, the output of the second output shaft are fixedly installed on the second output shaft 922 Gear 212 is rotated synchronously with the second output shaft 922, and the second output shaft output gear 212 is engaged with main reducing gear driven gear 74 Transmission, to which the power through the second output shaft 922 can be transferred to main reducing gear driven tooth from the second output shaft output gear 212 Wheel 74 and differential mechanism 75.
Similarly, motor power axis first gear 31 can be used for exporting the power through motor power axis 931, therefore motor Power axis first gear 31 equally with the engaged transmission of main reducing gear driven gear 74.
In some embodiments, as shown in Figure 1, power battery 3 is used to power to power motor 2；Auxiliary-motor 5 and engine 1 is connected, and auxiliary-motor 5 is also connected with power motor 2, DC-DC converter 4 and power battery 3 respectively, and auxiliary-motor 5 is in engine 1 To realize to the charging of power battery 3, to the power supply of power motor 2, in the power supply of DC-DC converter 4 when being generated electricity under drive It is at least one.
The dynamical system of the hybrid vehicle of the embodiment of the present invention as a result, can be such that engine is not involved in low speed Driving reduces clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improves comfort into without the use of clutch, and Engine can be made to be operated in economic zone in low speed, only power generation does not drive, and reduces oil consumption, reduces engine noise, maintains Vehicle low speed electric equilibrium and low speed ride comfort promote vehicle performance.Moreover, auxiliary-motor can directly be power battery charging, together When be alternatively low-voltage device power supply such as low tension battery, the first electrical equipment, can also be used as starter.
Furthermore, as shown in figures 1 and 3, the dynamical system of hybrid vehicle further includes control module 101, control Molding block 101 is for controlling the dynamical system of hybrid vehicle.It should be understood that control module 101 can be mixed The integrated of the controller in power vehicle with control function is closed, entire car controller, the Fig. 3 that may be, for example, hybrid vehicle are real The integrated of the first controller 51 and second controller 21 in example etc. is applied, but not limited to this.Control module is described in detail below Performed control method.
In some embodiments of the invention, the dynamical system of hybrid vehicle further includes control module 101, is being mixed In the driving process of power vehicle, control module 101 be used to obtain power battery 3 SOC value (State of Charge, it is charged State is also remaining capacity) and hybrid vehicle vehicle velocity V, and according to the SOC value and hybrid vehicle of power battery 3 Vehicle velocity V control auxiliary-motor 5 generated output P1, and obtain according to the generated output P1 of auxiliary-motor 5 the power generation work(of engine 1 Rate P0 operates in preset optimal economic region to control engine 1.
It should be noted that the SOC value of power battery 3 can be acquired by the battery management system of hybrid vehicle, from And the SOC value of collected power battery 3 is sent to control module 101 by battery management system, so that control module 101 obtains The SOC value of power battery 3.
It should be noted that determining the default optimal economic region of engine 1 in combination with engine's fuel consumption characteristics loop image. It is an example of engine's fuel consumption characteristics loop image as shown in Figure 1a, wherein side ordinate is the output torque of engine 1, Abscissa is the rotating speed of engine 1, and curve a is the fuel-economy curve of engine 1.The corresponding region of fuel-economy curve is The optimal economic region of engine, in other words when the torque of engine 1 and torque are located on the fuel-economy curve of engine optimum When, engine is in optimal economic region.As a result, in embodiments of the present invention, control module 101 can be by controlling engine 1 Rotating speed and output torque fall on engine fuel economic curve such as curve a so that engine 1 operate in it is preset best Economic zone.
Specifically, during hybrid electric vehicle is sailed, engine 1 can be output power to mixed by clutch 6 The wheel 7 of power vehicle is closed, and engine 1 can also drive auxiliary-motor 5 to generate electricity.The output power master of engine as a result, To include two parts, part output is to auxiliary-motor 5, that is, the generated output for driving auxiliary-motor 5 to generate electricity, another part is defeated Go out to wheel 7, that is, drives the driving power of wheel 7.
When engine 1 drives auxiliary-motor 5 to be generated electricity, control module 101 can obtain the SOC value of power battery 3 first With the speed of hybrid vehicle, auxiliary-motor 5 is then controlled according to the SOC value of power battery 3 and the speed of hybrid vehicle Generated output P1, and the generated output P0 of engine 1 is obtained to control engine 1 according to the generated output P1 of auxiliary-motor 5 Operate in preset optimal economic region.Control module 101 can be before making engine 1 be operated in preset optimal economic region The power that determining engine 1 drives auxiliary-motor 5 to generate electricity is put, to adjust the generated output P1 of auxiliary-motor 5.
Thereby, it is possible to make engine 1 be operated in preset optimal economic region, since engine 1 is in preset best warp Help region oil consumption is minimum, fuel economy highest, so as to reduce the oil consumption of engine 1, reduce the noise of engine 1, carry The economy of high vehicle operation.Moreover, because auxiliary-motor 5 has higher generated output and generating efficiency when low speed, so as to To meet the power demand run at a low speed, vehicle low speed electric equilibrium can be maintained, vehicle low speed ride comfort is maintained, promotes vehicle Power performance.Wherein, by power battery charging, it can be ensured that the power demand of power motor and high-voltage electrical equipment, in turn Ensure that power motor drives vehicle normally travel.
Further, according to one embodiment of present invention, control module 101 is used for：When the SOC value of power battery 3 is big In preset limiting value M2 and when less than or equal to the first preset value M1, if to be less than first default for the vehicle velocity V of hybrid vehicle Vehicle velocity V 1 controls the generated output P1 of auxiliary-motor 5.
Wherein, the first preset value can be the upper bound limit value of the SOC value of pre-set power battery 3, for example, stop filling The decision content of electricity, is preferably 30%.Preset limiting value can be the lower bound limit value of the SOC value of pre-set power battery 3, The decision content for for example, stopping electric discharge, is preferably 10%.It can be by power battery 3 according to the first preset value and preset limiting value SOC value be divided into three sections, i.e. the first electricity section, the second electricity section and third electricity section, when power battery 3 When SOC value is less than or equal to preset limiting value, the SOC value of power battery 3 is in the first electricity section, at this time power battery 3 Only charging is not discharged；When the SOC value of power battery 3 is more than preset limiting value and is less than or equal to the first preset value, power The SOC value of battery 3 is in the second electricity section, and there are charge requirements for power battery 3 at this time, you can is actively filled to power battery 3 Electricity；When the SOC value of power battery 3 is more than the first preset value, the SOC value of power battery 3 is in third electricity section, moves at this time Power battery 3 can not charge, i.e., power battery 3 will not actively be given to charge.
Specifically, control module 101, can after obtaining the speed of SOC value and hybrid vehicle of power battery 3 Judge the section residing for the SOC value of power battery 3, if the SOC value of power battery 3 is in middle electricity section, power battery 3 SOC value is more than preset limiting value and is less than or equal to the first preset value, then explanation can charge to power battery 3, at this time Control module 101 further judges whether the speed of hybrid vehicle is less than the first preset vehicle speed, if hybrid vehicle Speed be less than the first preset vehicle speed, then the generated output P1 of auxiliary-motor 5 is controlled, at this time the speed of hybrid vehicle Relatively low, required driving force is less, and power motor 2 is enough that hybrid electric vehicle is driven to sail, and engine 1 can only drive auxiliary-motor 5 generate electricity, and are not involved in driving.
In low speed, engine only generates electricity and is not involved in driving as a result, and since engine is not involved in driving, clutch is without making With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfort.
Further, according to one embodiment of present invention, control module 101 is additionally operable to：When the SOC value of power battery 3 It is default to be less than first more than preset limiting value M2 and less than or equal to the vehicle velocity V of the first preset value M1 and hybrid vehicle When vehicle velocity V 1, the vehicle demand power P2 of hybrid vehicle is obtained, and be less than or equal to auxiliary-motor 5 in vehicle demand power P2 When maximum allowable generated output Pmax, the generated output P1 of auxiliary-motor 5 is controlled.
Specifically, in the driving process of hybrid vehicle, if the SOC value of power battery 3 is more than preset pole Limit value M2 and it is less than the first preset vehicle speed V1 less than or equal to the vehicle velocity V of the first preset value M1 and hybrid vehicle, that is, mixes The speed of power vehicle is relatively low, and control module 101 then obtains the vehicle demand power P2 of hybrid vehicle, and in vehicle demand When power P 2 is less than or equal to the maximum allowable generated output Pmax of auxiliary-motor 5, the generated output P1 of auxiliary-motor 5 is controlled.
In low speed, engine only generates electricity and is not involved in driving as a result, and since engine is not involved in driving, clutch is without making With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfort.
Further, according to one embodiment of present invention, control module 101 is additionally operable to the SOC value when power battery 3 More than preset limiting value and less than or equal to the first preset value M1, hybrid vehicle vehicle velocity V be less than the first preset vehicle speed V1, And vehicle demand power P2 be less than or equal to auxiliary-motor 5 maximum allowable generated output Pmax when, obtain the oil of hybrid vehicle The vehicle resistance F of door tread depths D and hybrid vehicle, and it is less than or equal to the first predetermined depth D1 in gas pedal depth D And the vehicle resistance F of hybrid vehicle be less than or equal to the first default resistance F1 when, the generated output P1 of auxiliary-motor 5 is controlled System.
It should be noted that the car resistance that the vehicle resistance of hybrid vehicle can be hybrid vehicle for example rolls Resistance, acceleration resistance, grade resistance and air drag etc..
Specifically, if the SOC value of power battery 3 be more than preset limiting value and less than or equal to the first preset value M1, The vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1 and vehicle demand power P2 permits less than or equal to the maximum of auxiliary-motor 5 Perhaps generated output Pmax, control module 101 then obtain the gas pedal depth D and hybrid vehicle of hybrid vehicle in real time Vehicle resistance F, when the vehicle resistance F that gas pedal depth D is less than or equal to the first predetermined depth D1 and hybrid vehicle is small When equal to the first default resistance F1, control module 101 controls the generated output P1 of auxiliary-motor 5.
In low speed, engine only generates electricity and is not involved in driving as a result, and since engine is not involved in driving, clutch is without making With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfort.
As above, when hybrid vehicle is run at a low speed, engine 1 only power generation can be not involved in driving, not due to engine Driving is participated in, clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving easypro Adaptive, also, so that engine is operated in economic zone in low speed, the oil consumption due to engine in preset optimal economic region Minimum, fuel economy highest reduces engine noise so as to reduce oil consumption, the economy of vehicle operation is improved, to tie up Vehicle low speed electric equilibrium and low speed ride comfort are held, vehicle performance is promoted.
According to one embodiment of present invention, control module 101 is additionally operable to：When control engine 1 individually drives auxiliary-motor 5 Generated electricity and control power motor 2 alone output driving power when, according to following formula obtain engine 1 generated output：
P0=P1/ η/ζ
Wherein, P0 is the generated output of engine 1, and P1 is the generated output of auxiliary-motor 5, and η Belt Transmission Efficiencies, ζ is pair The efficiency of motor 5.
That is, in the case where engine 1 can only generate electricity and be not involved in driving, control module 101 can be according to auxiliary-motor 5 Generated output, Belt Transmission Efficiency η and auxiliary-motor 5 efficiency ζ calculate the generated output P0 of engine 1, and control and start Machine 1 drives auxiliary-motor 5 to generate electricity with the generated output P0 of acquisition, to control the generated output of auxiliary-motor 5.
Correspondingly, when the SOC value of the power battery of hybrid vehicle 3, vehicle velocity V, gas pedal depth D and vehicle resistance When F is unsatisfactory for above-mentioned condition, engine 1 may participate in driving, and specific work process is as follows.
According to one embodiment of present invention, control module 101 is additionally operable to：It is less than in the SOC value of power battery 3 preset Limiting value or the speed of hybrid vehicle are more than or equal to the first preset vehicle speed or vehicle demand power is more than auxiliary-motor 5 Maximum allowable generated output or gas pedal depth are more than the vehicle resistance of the first predetermined depth or hybrid vehicle When more than the first default resistance, control engine 1 participates in driving.
That is, in speed of the SOC value of power battery 3 less than preset limiting value M2 or hybrid vehicle It is more than the maximum allowable generated output of auxiliary-motor 5 more than or equal to the first preset vehicle speed or vehicle demand power or throttle is stepped on When plate depth is more than the vehicle resistance of the first predetermined depth or hybrid vehicle more than the first default resistance, control module 101 control engines 1 participate in driving, at this point, power battery 3 no longer discharges, the driving force needed for vehicle is larger, vehicle demand work( Rate is larger, gas pedal depth is larger or vehicle resistance is also larger, and power motor 2 is not enough to driving hybrid electric vehicle and sails, Engine 1 participates in driving to carry out supplying driving.
Engine 1 can participate in driving in the driving force deficiency that power motor 2 exports as a result, so that it is guaranteed that vehicle is normal Traveling, improves the power performance of vehicle, improves the mileage travelled of vehicle.
More specifically, control module 101 is additionally operable to：When vehicle demand power is more than the maximum allowable power generation work(of auxiliary-motor 5 When rate, also controls engine 1 and participate in driving so that engine 1 outputs power to wheel by clutch 6.
Also, control module 101 is additionally operable to：When the SOC value of power battery 3 is less than preset limiting value M2, control hair Motivation 1 participates in driving so that engine 1 outputs driving force to wheel 7 by clutch 6；When power battery 3 SOC value be less than etc. It is less than the first preset vehicle speed V1 in the vehicle velocity V of the first preset value M1, hybrid vehicle and gas pedal depth D is more than first in advance If when depth D1, control module 101 controls engine 1 and participates in driving so that engine 1 outputs power to vehicle by clutch 6 Wheel 7；When the SOC value of power battery 3 is less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle is less than the first default vehicle When the resistance F of fast V1 and hybrid vehicle is more than the first default resistance F1, control module 101 controls engine 1 and participates in driving So that engine 1 outputs power to wheel 7 by clutch 6.
Specifically, it carries out power generation in the drive auxiliary-motor 5 of engine 1 and power motor 2 outputs driving force to hybrid power When the wheel 7 of automobile, control module 101 obtains SOC value, the gas pedal depth of hybrid vehicle of power battery 3 in real time D, vehicle velocity V and vehicle resistance F, and the gas pedal depth D to the SOC value of power battery 3, hybrid vehicle, vehicle velocity V and whole Vehicle resistance F is judged.
First, when the SOC value of power battery 3 is less than preset limiting value M2, it is logical that control module 101 controls engine 1 It crosses clutch 6 and outputs power to wheel 7, so that engine 1 and power motor 2 simultaneously participate in driving, reduce power motor 2 Load is to reduce the power consumption of power battery 3, so as to ensure that engine 1 is operated in preset optimal economic region, simultaneously Avoid the SOC value rapid decrease of power battery 3.
Second, when the SOC value of power battery 3 is less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle is less than the When one preset vehicle speed V1 and gas pedal depth D are more than the first predetermined depth D1, control module 101 control engine 1 by from Clutch 6 outputs power to wheel 7, so that engine 1 and power motor 2 simultaneously participate in driving, reduces the load of power motor 2 To reduce the power consumption of power battery 3, so as to ensure that engine 1 is operated in preset optimal economic region, avoid simultaneously The SOC value rapid decrease of power battery 3.
Third, when the SOC value of power battery 3 is less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle is less than the When the resistance F of one preset vehicle speed V1 and hybrid vehicle is more than the first default resistance F1, control module 101 controls engine 1 Wheel 7 is output power to by clutch 6, so that engine 1 and power motor 2 simultaneously participate in driving, reduces power motor 2 Load to reduce the power consumption of power battery 3, so as to ensure that engine 1 is operated in preset optimal economic region, together When avoid the SOC value rapid decrease of power battery 3.
Engine 1 can participate in driving in the driving force deficiency that power motor 2 exports as a result, so that it is guaranteed that vehicle is normal Traveling, improves the power performance of vehicle, improves the mileage travelled of vehicle.Also, controllable engine is operated in economic zone Domain, oil consumption due to engine 1 in preset optimal economic region is minimum, fuel economy highest, so as to reduce oil consumption, drop Low engine noise improves vehicle economic performance.
In addition, control module 101 is additionally operable to：When the SOC value of power battery 3 is less than or equal to preset limiting value, and mixing When the speed of power vehicle is more than the first preset vehicle speed, control engine 1 will participate in driving so that engine 1 will by clutch 6 Power output is to wheel 7.
Engine 1 can participate in driving in the driving force deficiency that power motor 2 exports as a result, so that it is guaranteed that vehicle is normal Traveling, improves the power performance of vehicle, improves the mileage travelled of vehicle.
However, it is to be understood that control module 101 is additionally operable to：When the SOC value of power battery 3 is more than the first preset value When, engine 1 does not drive auxiliary-motor 5 to generate electricity, and the electricity of power battery 3 is close to full electricity at this time, without charging, engine 1 Auxiliary-motor 5 is not driven to generate electricity.That is, when the electricity of power battery 3 is close to full electricity, engine 1 does not drive secondary electricity Machine 5 generates electricity, to which auxiliary-motor 5 does not charge to power battery 3.
Furthermore, after auxiliary-motor 5 enters generated output shaping modes, control module 101 can be to the hair of auxiliary-motor 5 Electrical power is controlled, and the generated output of the control module of the embodiment of the present invention 101 control process is specifically described below.
According to one embodiment of present invention, control module 101 is additionally operable to：According to the vehicle demand work(of hybrid vehicle The charge power P3 of rate P2 and power battery 3 controls the generated output P1 of auxiliary-motor 5.
According to one embodiment of present invention, according to the vehicle demand power P2 of hybrid vehicle and filling for power battery The formula that electrical power P 3 controls the generated output P1 of auxiliary-motor 5 is as follows：
P1=P2+P3, wherein P2=P11+P21,
P1 is the generated output of auxiliary-motor 5, and P2 is vehicle demand power, and P3 is the charge power of power battery 3, and P11 is Vehicle driving power, P21 are electrical equipment power.
It should be noted that electrical equipment includes the first electrical equipment 10 and the second electrical equipment 30, i.e. electrical equipment work( Rate P21 may include the power needed for high-voltage electrical equipment and low voltage equipment..
It should be noted that vehicle driving power P11 may include that the output power module 101 of power motor 2 can root Vehicle driving power P11 is obtained according to default throttle-torque curve of power motor 2 and the rotating speed of power motor 2, wherein pre- If throttle-torque curve can be determined when hybrid electric vehicle power matches.In addition, control module 101 can be according to vehicle The electrical equipment of operation obtains electrical equipment power P 21 in real time, such as calculates electrical equipment power by DC consumption in bus P21.In addition, control module 101 can obtain the charge power P3 of power battery 3 according to the SOC value of power battery 3.Assuming that in real time The vehicle driving power P11=b1kw of acquisition, electrical equipment power P 21=b2kw, the charge power P3=of power battery 3 B3kw, then generated output=b1+b2+b3 of auxiliary-motor 5.
Specifically, during hybrid electric vehicle is sailed, control module 101 can obtain the charging work(of power battery 3 Rate P3, vehicle driving power P11 and electrical equipment power P 21, and by the charge power P3 of power battery 3, vehicle driving power The generated output P1 of the sum of P11 and electrical equipment power P 21 as auxiliary-motor 5, control module 101 can be according to calculating as a result, P1 values the generated output of auxiliary-motor 5 is controlled, such as control module 101 can be according to calculated P1 values to engine 1 Output torque and rotating speed controlled, to drive the power that generates electricity of auxiliary-motor 5 to control in engine 1.
Further, according to one embodiment of present invention, control module 101 is additionally operable to：Obtain the SOC of power battery 3 It is worth rate of change, and according to vehicle demand power P2 minimum output power Pmins corresponding with the optimal economic region of engine 1 Between relationship and power battery SOC value rate of change control auxiliary-motor 5 generated output P1.
Specifically, can according to fig. 1a shown in universal characteristic curve of engine determine the optimal economic region of engine, And then the corresponding minimum output power Pmin in optimal economic region of engine is obtained, control module 101 is determining engine After the corresponding minimum output power Pmin in optimal economic region, you can according to the best of vehicle demand power P2 and engine 1 The secondary electricity of SOC value rate of change control of relationship and power battery 3 between the corresponding minimum output power Pmin in economic zone The generated output of machine 5.
As a result, when hybrid vehicle is run at a low speed, engine is made to be operated in economic zone, oil consumption can be reduced, reduced Engine noise improves the economic performance of vehicle, also, engine 1 only power generation can be not involved in driving in low speed, due to starting Machine is not involved in driving, and clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving Comfort, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, promote vehicle performance.
It is described further below, control module 101 is according to the optimal economic region pair of vehicle demand power P2 and engine 1 The power generation work(of the SOC value rate of change control auxiliary-motor 5 of relationship and power battery 3 between the minimum output power Pmin answered The specific regulative mode of rate.
Specifically, it carries out power generation in the drive auxiliary-motor 5 of engine 1 and power motor 2 outputs driving force to hybrid power When the wheel 7 of automobile, vehicle driving power P11 and electrical equipment power P 21 are obtained in real time, to obtain the whole of hybrid vehicle Vehicle demand power P2, control module 101 judge the vehicle demand power P2 of hybrid vehicle, wherein vehicle demand Power P 2 can meet following three kinds of situations.
The first situation is：Vehicle demand power P2 is less than the corresponding minimum output work in optimal economic region of engine 1 Rate Pmin；The second situation is：Vehicle demand power P2 is more than or equal to the corresponding minimum output in optimal economic region of engine Power P min and the maximum allowable generated output Pmax for being less than or equal to auxiliary-motor 5；The third situation is：Vehicle demand power P2 is big In the maximum allowable generated output Pmax of auxiliary-motor 5.
In one embodiment of the first situation, when vehicle demand power P2 is less than the optimal economic region of engine 1 When corresponding minimum output power Pmin, control module 101 obtains power battery 3 according to the SOC value rate of change of power battery 3 Charge power P3, and judge whether the charge power P3 of power battery 3 is less than minimum output power Pmin and vehicle demand The difference of power P 2, wherein if the charge power P3 of power battery 3 is less than minimum output power Pmin and vehicle demand power The difference of P2 is then controlled engine 1 and is generated electricity with minimum output power Pmin to control the generated output P1 of auxiliary-motor 5；Such as The charge power P3 of fruit power battery 3 is more than or equal to the difference of minimum output power Pmin and vehicle demand power P2, then basis The sum of charge power P3 and vehicle demand power P2 of power battery 3 obtain engine 1 in preset optimal economic region Output power, and control engine and generated electricity with the output power obtained to control the generated output P1 of auxiliary-motor 5.
It should be noted that the SOC value rate of change for the power battery 3 that can prestore in control module 101 and power battery 3 The first relation table between charge power P3, as a result, control module 101 obtain power battery 3 SOC value rate of change it Afterwards, the charge power P3 of corresponding power battery 3 can be obtained by comparing the first relation table.The SOC value of power battery 3 changes Rate and the charge power P3 of power battery 3 meet relationship shown in the following table 1.
Table 1
The SOC value rate of change of power battery 3 A1 A2 A3 A4 A5
The charge power P3 of power battery 3 B1 B2 B3 B4 B5
Known to table 1, when the SOC value rate of change that control module 101 is got is A1, the corresponding power that gets The charge power P3 of battery 3 is B1；When the SOC value rate of change that control module 101 is got is A2, what is got is corresponding The charge power P3 of power battery 3 is B2；When the SOC value rate of change that control module 101 is got is A3, the phase that gets The charge power P3 for the power battery 3 answered is B3；When the SOC value rate of change that control module 101 is got is A4, get Corresponding power battery 3 charge power P3 be B4；When the SOC value rate of change that control module 101 is got is A5, obtain The charge power P3 for the corresponding power battery 3 got is B5.
Specifically, when carrying out generated output control to auxiliary-motor 5, vehicle driving power P11 and electric appliance are obtained in real time Plant capacity P21, to obtain the vehicle demand power P2 of hybrid vehicle, and to the vehicle demand power of hybrid vehicle P2 is judged.As vehicle demand power P2 minimum output power Pmins corresponding less than the optimal economic region of engine 1, The charge power P3 of power battery 3 can be obtained according to the SOC value rate of change of power battery 3, and judge the charging of power battery 3 Whether power P 3 is less than or equal to the difference of minimum output power Pmin and vehicle demand power P2.
As vehicle demand power P2 minimum output power Pmins corresponding less than the optimal economic region of engine 1, such as The charge power P3 of fruit power battery 3 is less than the difference of minimum output power Pmin and vehicle demand power P2, i.e. P3 ＜ Pmin- P2 is then generated electricity with minimum output power Pmin to control the generated output of auxiliary-motor 1 by controlling engine 1；If Differences of the charge power P3 of power battery 3 more than or equal to minimum output power Pmin and vehicle demand power P2, i.e. P3 >= Pmin-P2, then according to the sum of the charge power P3 of power battery 3 and vehicle demand power P2 obtain engine 1 it is preset most Output power in good economic zone, and generated electricity with the output power of acquisition to control auxiliary-motor 5 by controlling engine 1 Generated output.
As a result, when vehicle demand power P2 is less than the corresponding minimum output power Pmin in optimal economic region of engine 1 When, according to the charge power P3 of power battery 3 minimum output power Pmins corresponding with the optimal economic region of engine 1 with it is whole The generated output of the Relation acquisition engine 1 of the difference of vehicle demand power P2, so that engine 1 operates in preset optimal economic area Domain, and engine 1 is only generated electricity and is not involved in driving, so as to reduce the oil consumption of engine, and reduces making an uproar for engine Sound.
In one embodiment of the second situation, when vehicle demand power P2 is more than or equal to the optimal economic area of engine The corresponding minimum output power Pmin in domain and less than or equal to auxiliary-motor 5 maximum allowable generated output Pmax when, control module 101 The charge power P3 of power battery 3 is obtained according to the SOC value rate of change of power battery 3, and according to the charging work(of power battery 3 The sum of rate P3 and vehicle demand power P2 obtain output power P4, Yi Jitong of the engine 1 in preset optimal economic region Control engine 1 is crossed to be generated electricity with the output power P4 of acquisition to control the generated output P1 of auxiliary-motor 5.
Specifically, when vehicle demand power P2 is more than or equal to the corresponding minimum output in optimal economic region of engine 1 Power P min and less than auxiliary-motor 5 maximum allowable generated output Pmax when, control module 101 control engine 1 be operated in The charge power P3 of power battery 3 is obtained when preset optimal economic region also according to the SOC value rate of change of power battery 3, And engine 1 is obtained in preset optimal economic area according to the sum of the charge power P3 of power battery 3 and vehicle demand power P2 Output power P4 in domain, wherein the output power P4=P3+P2 of acquisition.In turn, control module 101 controls engine 1 to obtain The output power P4 taken generates electricity to control the generated output P1 of auxiliary-motor 5, to make the SOC value of power battery 3 increase, and Engine 1 is set to be operated in preset optimal economic region.
As a result, when vehicle demand power P2 is more than or equal to the corresponding minimum output power in optimal economic region of engine 1 Pmin and less than auxiliary-motor 5 maximum allowable generated output Pmax when, according to the charge power P3 of power battery 3 and vehicle demand The sum of power P 2 obtains the output power of engine 1, so that engine 1 operates in preset optimal economic region, and engine 1 It is only generated electricity and is not involved in driving, so as to reduce the oil consumption of engine, and reduce the noise of engine.
In one embodiment of the third situation, when vehicle demand power P2 is more than the maximum allowable power generation of auxiliary-motor 5 When power P max, control module 101 also controls engine 1 and participates in driving so that engine 1 is output power to by clutch 6 Wheel 7.
Specifically, when vehicle demand power P2 is more than maximum allowable generated output Pmax, that is, hybrid power of auxiliary-motor 5 The vehicle demand power P2 of automobile be higher than auxiliary-motor 5 generated output P1 when, control module 101 also control engine 1 by from Clutch 6 outputs driving force to wheel 7 so that engine 1 participates in driving, to by engine 1 undertake part driving power P ＇, To reduce the demand to the generated output P1 of auxiliary-motor 5, engine 1 is made to be operated in preset optimal economic region.
As a result, when vehicle demand power P2 is more than the maximum allowable generated output Pmax of auxiliary-motor 5, power battery 3 is right Outer electric discharge is to give power motor 2 to power, at this point, control module 101, which controls power motor 2, outputs power to hybrid vehicle Wheel 7 so that engine 1 is operated in preset optimal economic region.
In low speed, engine can be operated in economic zone as a result, and only power generation is not involved in driving, from without the use of from Clutch reduces clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improves comfort, and reduce oil consumption, reduction is started Machine noise, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, promote vehicle performance.
To sum up, the dynamical system of the hybrid vehicle proposed according to embodiments of the present invention, engine will by clutch For power output to the wheel of hybrid vehicle, power motor outputs driving force to the wheel of hybrid vehicle, power battery It powers to power motor, auxiliary-motor generates electricity under the drive of engine, and control module obtains the SOC value of power battery and mixes The speed of power vehicle is closed, and power generation is entered according to the SOC value of power battery and the speed of hybrid vehicle control auxiliary-motor Power regulation pattern, so as to reduce the oil consumption of engine, improves so that engine operates in preset optimal economic region The economy of vehicle operation, and engine noise is reduced, while can realize multiple drive modes, it is able to maintain that vehicle low speed Electric equilibrium and low speed ride comfort promote vehicle performance.
The embodiment of the present invention also proposed a kind of hybrid vehicle.
Fig. 6 is the block diagram of hybrid vehicle according to the ... of the embodiment of the present invention.As shown in fig. 6, hybrid power vapour Vehicle 200 includes the dynamical system 100 of the hybrid vehicle of above-described embodiment.
To sum up, the hybrid vehicle proposed according to embodiments of the present invention passes through the dynamical system of above-mentioned hybrid vehicle System can reduce the oil consumption of engine, improve the economy of vehicle operation, and can improve the stationarity of Full Vehicle System, drop The low energy consumption of engine improves the economy of vehicle operation.
Fig. 7 is the flow chart of the electricity-generating control method of hybrid vehicle according to the ... of the embodiment of the present invention.Hybrid power vapour The dynamical system of vehicle includes engine, power motor, power battery, DC-DC converter, the auxiliary-motor being connected with engine, hair Motivation outputs power to the wheel of hybrid vehicle by clutch, and power motor is for outputting driving force to hybrid power The wheel of automobile, power battery for give power motor power supply, auxiliary-motor respectively with power motor, DC-DC converter and power Battery is connected, and auxiliary-motor generates electricity under the drive of engine.As shown in fig. 7, the electricity-generating control method of hybrid vehicle Include the following steps：
S10：Obtain the speed of the SOC value and hybrid vehicle of power battery.
It should be noted that the SOC value of power battery can be acquired by the battery management system of hybrid vehicle, so that Obtain the SOC value of power battery.
S20：The generated output P1 of auxiliary-motor is controlled according to the SOC value of power battery and the speed of hybrid vehicle.
S30：The generated output that the engine of hybrid vehicle is obtained according to the generated output of auxiliary-motor is started with control Machine operates in preset optimal economic region, wherein auxiliary-motor generates electricity under the drive of engine.
It should be noted that determining the default optimal economic region of engine in combination with engine's fuel consumption characteristics loop image. It is an example of engine's fuel consumption characteristics loop image as shown in Figure 1a, wherein side ordinate is the output torque of engine, horizontal Coordinate is the rotating speed of engine, and curve a is the fuel-economy curve of engine.The corresponding region of fuel-economy curve is to start The optimal economic region of machine, in other words when the torque of engine and torque are located on the fuel-economy curve of engine optimum, hair Motivation is in optimal economic region.As a result, in embodiments of the present invention, it can be fallen by the rotating speed and output torque for controlling engine On engine fuel economic curve such as curve a, so that engine operates in preset optimal economic region.
Further, according to one embodiment of present invention, in the driving process of hybrid vehicle, power electric is obtained The SOC value in pond and the vehicle velocity V of hybrid vehicle, and controlled according to the SOC value of power battery and the vehicle velocity V of hybrid vehicle The generated output P1 of auxiliary-motor, and the generated output P0 of engine 1 is obtained to control hair according to the generated output P1 of auxiliary-motor Motivation operates in preset optimal economic region.
Specifically, during hybrid electric vehicle is sailed, engine can output power to mixing by clutch The wheel of power vehicle, and engine can also drive auxiliary-motor to generate electricity.The output power of engine includes mainly as a result, Two parts, to auxiliary-motor, that is, the power for driving auxiliary-motor to generate electricity, another part is to export to wheel, i.e., for part output Drive the power of wheel.
When driven by engine auxiliary-motor is generated electricity, the SOC value and hybrid vehicle of power battery can be obtained first Speed, the generated output P1 of auxiliary-motor is then controlled according to the SOC value of power battery and the speed of hybrid vehicle, and The generated output P0 that engine 1 is obtained according to the generated output P1 of auxiliary-motor operates in preset optimal economic to control engine Region.Determine what driven by engine auxiliary-motor generated electricity under the premise of so that engine is operated in preset optimal economic region Power, to adjust the generated output of auxiliary-motor.
Thereby, it is possible to make engine be operated in preset optimal economic region, since engine is in preset optimal economic The oil consumption in region is minimum, fuel economy highest reduces the noise of engine so as to reduce the oil consumption of engine, improves whole The economy of vehicle operation.Moreover, because auxiliary-motor has higher generated output and generating efficiency when low speed, so as to meet The power demand run at a low speed can maintain vehicle low speed electric equilibrium, maintain vehicle low speed ride comfort, promote the dynamic property of vehicle Energy.Wherein, by power battery charging, it can be ensured that the power demand of power motor and high-voltage electrical equipment, and then ensure to move Force motor drives vehicle normally travel.
Further, according to one embodiment of present invention, when the SOC value of power battery is more than preset limiting value and small When equal to the first preset value, if the vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1, the power generation to auxiliary-motor Power P 1 is controlled.
Wherein, the first preset value can be the upper bound limit value of the SOC value of pre-set power battery, for example, stop charging Decision content, be preferably 30%.Preset limiting value can be the lower bound limit value of the SOC value of pre-set power battery, example It is such as the decision content for stopping electric discharge, is preferably 10%.It can be by power battery according to the first preset value and preset limiting value SOC value is divided into three sections, i.e. the first electricity section, the second electricity section and third electricity section, when the SOC value of power battery When less than or equal to preset limiting value, the SOC value of power battery is in the first electricity section, and power battery only charges not at this time Electric discharge；When the SOC value of power battery is more than preset limiting value and is less than or equal to the first preset value, the SOC of power battery Value is in the second electricity section, and there are charge requirements for power battery at this time, you can actively gives power battery charging；Work as power battery SOC value be more than the first preset value when, the SOC value of power battery is in third electricity section, and power battery can not charge at this time, It will not actively give power battery charging.
Specifically, after obtaining the vehicle velocity V of SOC value and hybrid vehicle of power battery, it can determine whether power electric Section residing for the SOC value in pond, if the SOC value of power battery is in middle electricity section, the SOC value of power battery, which is more than, to be preset Limiting value and be less than or equal to the first preset value, then explanation can charge to power battery, at this time further judge mixing Whether the vehicle velocity V of power vehicle is less than the first preset vehicle speed V1, if the vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1 then controls the generated output P1 of auxiliary-motor 5, and the speed of hybrid vehicle is relatively low at this time, required driving force compared with Few, power motor is enough that hybrid electric vehicle is driven to sail, and engine only can drive auxiliary-motor to generate electricity, and be not involved in driving.
As described above, as shown in figure 8, the electricity-generating control method of the hybrid vehicle of the embodiment of the present invention can be according to power The generated output of the SOC value M of battery and the vehicle velocity V control auxiliary-motor of hybrid vehicle, specifically include following steps：
S101：Obtain the vehicle velocity V of the SOC value M and hybrid vehicle of power battery.
S102：When the SOC value M of power battery is more than preset limiting value M2 and is less than or equal to the first preset value M1, obtain Take the vehicle velocity V of hybrid vehicle.
S103：When the vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1, to the generated output P1 of auxiliary-motor into Row control.
In low speed, engine only generates electricity and is not involved in driving as a result, and since engine is not involved in driving, clutch is without making With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfort.
Further, according to one embodiment of present invention, when the SOC value of power battery be more than preset limiting value M2 and When being less than the first preset vehicle speed V1 less than or equal to the vehicle velocity V of the first preset value M1 and hybrid vehicle, it is dynamic also to obtain mixing The vehicle demand power P2 of power automobile, and it is less than or equal to the maximum allowable generated output Pmax of auxiliary-motor in vehicle demand power P2 When, the generated output P1 of auxiliary-motor is controlled.
Specifically, in the driving process of hybrid vehicle, if the SOC value of power battery is more than the preset limit Value M2 and it is less than the first preset vehicle speed V1 less than or equal to the vehicle velocity V of the first preset value M1 and hybrid vehicle, i.e. mixing is dynamic The speed of power automobile is relatively low, then obtains the vehicle demand power P2 of hybrid vehicle, and be less than in vehicle demand power P2 etc. When the maximum allowable generated output Pmax of auxiliary-motor, the generated output P1 of auxiliary-motor is controlled.
As described above, as shown in figure 9, the electricity-generating control method of the hybrid vehicle of the embodiment of the present invention can be according to power The SOC value M of battery, the generated output of vehicle velocity V and vehicle demand power P2 control auxiliary-motors, specifically include following steps：
S201：Obtain the vehicle velocity V of the SOC value M and hybrid vehicle of power battery.
S202：When the SOC value M of power battery is more than preset limiting value M2 and is less than or equal to the first preset value M1, obtain Take the vehicle velocity V of hybrid vehicle.
S203：When the vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1, the vehicle of hybrid vehicle is obtained Demand power P2.
S204：When vehicle demand power P2 is less than or equal to the maximum allowable generated output Pmax of auxiliary-motor, to auxiliary-motor Generated output P1 controlled.S205：When vehicle demand power P2 is more than the maximum allowable generated output Pmax of auxiliary-motor, It controls engine and participates in driving.
In low speed, engine only generates electricity and is not involved in driving as a result, and since engine is not involved in driving, clutch is without making With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfort.
Further, according to one embodiment of present invention, when the SOC value of power battery be more than preset limiting value and It is less than the first preset vehicle speed V1 less than or equal to the vehicle velocity V of the first preset value M1, hybrid vehicle and vehicle demand power P2 is small When equal to the maximum allowable generated output Pmax of auxiliary-motor, gas pedal depth D and the mixing of hybrid vehicle are also obtained The vehicle resistance F of power vehicle, and it is less than or equal to the whole of the first predetermined depth D1 and hybrid vehicle in gas pedal depth D When vehicle resistance F is less than or equal to the first default resistance F1, the generated output P1 of auxiliary-motor is controlled.
It should be noted that the car resistance that the vehicle resistance of hybrid vehicle can be hybrid vehicle for example rolls Resistance, acceleration resistance, grade resistance and air drag etc..
Specifically, if the SOC value of power battery is more than preset limiting value and is less than or equal to the first preset value M1, mixes The vehicle velocity V for closing power vehicle is less than the first preset vehicle speed V1 and vehicle demand power P2 is less than or equal to the maximum allowable of auxiliary-motor Generated output Pmax then obtains the vehicle resistance F of the gas pedal depth D and hybrid vehicle of hybrid vehicle in real time, When the vehicle resistance F that gas pedal depth D is less than or equal to the first predetermined depth D1 and hybrid vehicle is less than or equal to first in advance When handicapping power F1, illustrate that hybrid vehicle operates in low-speed mode, and control the generated output P1 of auxiliary-motor.
In low speed, engine only generates electricity and is not involved in driving as a result, and since engine is not involved in driving, clutch is without making With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfort.
As above, when hybrid vehicle is run at a low speed, engine 1 only power generation can be not involved in driving, not due to engine Driving is participated in, clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving easypro Adaptive, also, so that engine is operated in economic zone in low speed, the oil consumption due to engine in preset optimal economic region Minimum, fuel economy highest reduces engine noise so as to reduce oil consumption, the economy of vehicle operation is improved, to tie up Vehicle low speed electric equilibrium and low speed ride comfort are held, vehicle performance is promoted.
According to one embodiment of present invention, when control engine individually drives auxiliary-motor to be generated electricity and controls power When the independent output driving power of motor, the generated output P0 of engine is obtained according to following formula：
P0=P1/ η/ζ
Wherein, P1 indicates that the generated output of auxiliary-motor, η indicate that Belt Transmission Efficiency, ζ indicate the efficiency of auxiliary-motor.
That is, in the case where engine can only generate electricity and be not involved in driving, generated output, skin that can be according to auxiliary-motor The power generation work(that the efficiency ζ of V belt translation efficiency eta and auxiliary-motor calculates the generated output P0 of engine, and controls engine to obtain Rate P0 drives auxiliary-motor to generate electricity, to control the generated output of auxiliary-motor.
Correspondingly, as the SOC value of the power battery of hybrid vehicle, vehicle velocity V, gas pedal depth D and vehicle resistance F When being unsatisfactory for above-mentioned condition, engine may participate in driving, and specific work process is as follows.
According to one embodiment of present invention, it is less than preset limiting value or hybrid power vapour in the SOC value of power battery The speed of vehicle be more than or equal to the first preset vehicle speed or vehicle demand power be more than auxiliary-motor maximum allowable generated output or When person's gas pedal depth is more than the vehicle resistance of the first predetermined depth or hybrid vehicle more than the first default resistance, It controls engine and participates in driving.
That is, the SOC value in power battery is big less than the speed of preset limiting value M2 or hybrid vehicle In the maximum allowable generated output or gas pedal that are more than auxiliary-motor equal to the first preset vehicle speed or vehicle demand power When depth is more than the vehicle resistance of the first predetermined depth or hybrid vehicle more than the first default resistance, engine is controlled Driving is participated in, at this point, power battery no longer discharges, the driving force needed for vehicle is larger, vehicle demand power is larger, gas pedal Depth is larger or vehicle resistance is also larger, power motor be not enough to driving hybrid electric vehicle sail, engine participate in driving with It carries out supplying driving.
Engine can participate in driving in the driving force deficiency that power motor exports as a result, so that it is guaranteed that the normal row of vehicle It sails, improves the power performance of vehicle, improve the mileage travelled of vehicle.
More specifically, when vehicle demand power is more than the maximum allowable generated output of auxiliary-motor, engine ginseng is also controlled With driving so that engine outputs power to wheel by clutch.
Also, when the SOC value of power battery be less than or equal to preset limiting value M2 when, also control engine participate in driving with So that engine is passed through clutch and outputs power to wheel；When the SOC value of power battery is less than or equal to the first preset value M1, mixing When the vehicle velocity V of power vehicle is less than the first preset vehicle speed V1 and gas pedal depth D and is more than the first predetermined depth D1, also control hair Motivation participates in driving so that engine outputs power to wheel by clutch；When the SOC value of power battery is less than or equal to the One preset value M1, hybrid vehicle vehicle velocity V be less than the vehicle resistance F of the first preset vehicle speed V1 and hybrid vehicle and be more than When the first default resistance F1, also controls engine and participate in driving so that engine outputs power to wheel by clutch.
Specifically, it carries out power generation in driven by engine auxiliary-motor and power motor outputs driving force to hybrid vehicle Wheel when, obtain in real time the SOC value of power battery, hybrid vehicle gas pedal depth D, vehicle velocity V and vehicle resistance F, and the gas pedal depth D to the SOC value of power battery, hybrid vehicle, vehicle velocity V and vehicle resistance F judge, and The generated output of auxiliary-motor is adjusted according to following three kinds of judging results：
First, when the SOC value of power battery is less than preset limiting value M2, control engine is by clutch by power It is output to wheel, so that engine and power motor simultaneously participate in driving, reduces the load of power motor to reduce power battery Power consumption, so as to ensure that engine is operated in preset optimal economic region, while avoiding the SOC value of power battery fast Speed declines.
Second, when the SOC value of power battery is less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle is less than the When one preset vehicle speed V1 and gas pedal depth D are more than the first predetermined depth D1, control engine is defeated by power by clutch Go out to wheel, so that engine and power motor simultaneously participate in driving, reduces the load of power motor to reduce power battery Power consumption so as to ensure that engine is operated in preset optimal economic region, while avoiding the SOC value of power battery quick Decline.
Third, when the SOC value of power battery is less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle is less than the When the resistance F of one preset vehicle speed V1 and hybrid vehicle is more than the first default resistance F1, control engine will by clutch Power output is to wheel, so that engine and power motor simultaneously participate in driving, reduces the load of power motor to reduce power The power consumption of battery so as to ensure that engine is operated in preset optimal economic region, while avoiding the SOC of power battery It is worth rapid decrease.
As described above, as shown in Figure 10, the electricity-generating control method of the hybrid vehicle of the embodiment of the present invention can be according to dynamic The SOC value M of power battery, the generated output of vehicle velocity V and vehicle demand power P2 control auxiliary-motors, specifically include following steps：
S301：Obtain the vehicle velocity V of the SOC value M and hybrid vehicle of power battery.
S302：When the SOC value M of power battery is more than preset limiting value M2 and is less than or equal to the first preset value M1, obtain Take the vehicle velocity V of hybrid vehicle.S303：When the vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1, mixing is obtained The vehicle demand power P2 of power vehicle.
S304：When vehicle demand power P2 is less than or equal to the maximum allowable generated output Pmax of auxiliary-motor, mixing is obtained The gas pedal depth D of the power vehicle and vehicle resistance F of hybrid vehicle.
S305：When the vehicle resistance F that gas pedal depth D is more than the first predetermined depth D1 or hybrid vehicle is more than When the SOC value M of first default resistance F1 or power battery is less than or equal to preset limiting value M2, control engine participates in driving So that engine outputs power to wheel by clutch.
S306：When the vehicle resistance F that gas pedal depth D is less than or equal to the first predetermined depth D1 and hybrid vehicle is small When equal to the first default resistance F1, the generated output P1 of auxiliary-motor is controlled.S307：When vehicle demand power P2 is more than When the maximum allowable generated output Pmax of auxiliary-motor, control engine participates in driving so that engine is defeated by power by clutch Go out to wheel.
Engine can participate in driving in the driving force deficiency that power motor exports as a result, so that it is guaranteed that the normal row of vehicle It sails, improves the power performance of vehicle, improve the mileage travelled of vehicle.Also, controllable engine is operated in economic zone, Oil consumption due to engine in preset optimal economic region is minimum, fuel economy highest reduces hair so as to reduce oil consumption Motivation noise improves vehicle economic performance.
In addition, when the SOC value of power battery is less than or equal to preset limiting value, and the speed of hybrid vehicle is more than the When one preset vehicle speed, control engine participates in driving so that engine outputs power to wheel by clutch.
Engine can participate in driving in the driving force deficiency that power motor exports as a result, so that it is guaranteed that the normal row of vehicle It sails, improves the power performance of vehicle, improve the mileage travelled of vehicle.
However, it is to be understood that when the SOC value of power battery is more than the first preset value, engine does not drive secondary electricity Machine generates electricity, and the electricity of power battery is close to full electricity at this time, and without charging, engine does not drive auxiliary-motor to generate electricity. That is when the electricity of power battery is close to full electricity, engine does not drive auxiliary-motor to generate electricity, to which auxiliary-motor is not to dynamic Power battery charges.
Furthermore, after auxiliary-motor enters generated output shaping modes, the generated output of auxiliary-motor can be adjusted Section, is below specifically described the generated output adjustment process of the embodiment of the present invention.
According to one embodiment of present invention, after auxiliary-motor enters generated output shaping modes, according to hybrid power vapour The vehicle demand power P2 of vehicle and the charge power P3 of power battery control the generated output P1 of auxiliary-motor.
According to one embodiment of present invention, according to the vehicle demand power P2 of hybrid vehicle and filling for power battery The formula that electrical power P 3 controls the generated output P1 of auxiliary-motor is as follows：
P1=P2+P3, wherein P2=P11+P21,
P1 is the generated output of auxiliary-motor, and P2 is vehicle demand power, and P3 is the charge power of power battery, and P11 is whole Vehicle driving power, P21 are electrical equipment power.
It should be noted that electrical equipment may include the first electrical equipment and the second electrical equipment, i.e. electrical equipment power P21 may include the power needed for high-voltage electrical equipment and low voltage equipment.
It should be noted that vehicle driving power P11 may include the output power of power motor 2, it can be according to power motor Default throttle-torque curve and the rotating speed of power motor obtain vehicle driving power P11, wherein default throttle-torque is bent Line can be determined when hybrid electric vehicle power matches.In addition, according to the electrical equipment that vehicle is run electricity can be obtained in real time Device plant capacity P21, such as electrical equipment power P 21 is calculated by DC consumption in bus.In addition, can be according to power battery SOC value obtains the charge power P3 of power battery.Assuming that the vehicle driving power P11=b1kw obtained in real time, electrical equipment work( Rate P21=b2kw, the charge power P3=b3kw of power battery, then generated output=b1+b2+b3 of auxiliary-motor.
Specifically, during hybrid electric vehicle is sailed, charge power P3, the vehicle driving of power battery can be obtained Power P 11 and electrical equipment power P 21, and by the charge power P3, vehicle driving power P11 and electrical equipment work(of power battery Generated output P1s of the sum of the rate P21 as auxiliary-motor can carry out the generated output of auxiliary-motor according to calculated P1 values as a result, Control, such as the output torque and rotating speed of engine can be controlled according to calculated P1 values, with to driven by engine pair The power that motor generates electricity is controlled.
Further, according to one embodiment of present invention, the generated output of auxiliary-motor is adjusted, including：It obtains The SOC value rate of change of power battery, and according to vehicle demand power P2 minimums corresponding with the optimal economic region of engine The generated output of the SOC value rate of change control auxiliary-motor of relationship and power battery between output power Pmin.
Specifically, can according to fig. 1a shown in universal characteristic curve of engine determine the optimal economic region of engine, And then the corresponding minimum output power Pmin in optimal economic region of engine is obtained, in the optimal economic region for determining engine After corresponding minimum output power Pmin, you can corresponding with the optimal economic region of engine according to vehicle demand power P2 The generated output of the SOC value rate of change control auxiliary-motor 5 of relationship and power battery between minimum output power Pmin.
As a result, when hybrid vehicle is run at a low speed, engine is made to be operated in economic zone, oil consumption can be reduced, reduced Engine noise improves the economic performance of vehicle, also, engine only power generation can be not involved in driving in low speed, due to starting Machine is not involved in driving, and clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving Comfort, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, promote vehicle performance.
Be described further below after auxiliary-motor enters generated output shaping modes, according to vehicle demand power P2 with start The SOC value rate of change control of relationship and power battery between the corresponding minimum output power Pmin in optimal economic region of machine The specific regulative mode of the generated output of auxiliary-motor processed.
Specifically, it carries out power generation in driven by engine auxiliary-motor and power motor outputs driving force to hybrid vehicle Wheel when, obtain vehicle driving power P11 and electrical equipment power P 21 in real time, the vehicle to obtain hybrid vehicle needs Power P 2 is sought, the vehicle demand power P2 of hybrid vehicle is judged, wherein vehicle demand power P2 can meet following Three kinds of situations.
The first situation is：Vehicle demand power P2 is less than the corresponding minimum output power in optimal economic region of engine Pmin；The second situation is：Vehicle demand power P2 is more than or equal to the corresponding minimum output work in optimal economic region of engine Rate Pmin and the maximum allowable generated output Pmax for being less than or equal to auxiliary-motor；The third situation is：Vehicle demand power P2 is more than The maximum allowable generated output Pmax of auxiliary-motor.
In one embodiment of the first situation, when vehicle demand power P2 is less than the optimal economic region pair of engine When the minimum output power Pmin answered, the charge power P3 of power battery is obtained according to the SOC value rate of change of power battery, and Judge whether the charge power P3 of power battery is less than the difference of minimum output power Pmin and vehicle demand power P2, wherein If the charge power P3 of power battery is less than the difference of minimum output power Pmin and vehicle demand power P2, control is started Machine is generated electricity with minimum output power Pmin to control the generated output of auxiliary-motor；If the charge power P3 of power battery More than or equal to the difference of minimum output power Pmin and vehicle demand power P2, then according to the charge power P3 of power battery with it is whole The sum of vehicle demand power P2 obtains output power of the engine in preset optimal economic region, and controls engine to obtain Output power generate electricity to control the generated output P1 of auxiliary-motor.
It should be noted that between the SOC value rate of change for the power battery that can prestore and the charge power P3 of power battery The first relation table, as a result, obtain power battery SOC value rate of change after, by compare the first relation table can obtain Take the charge power P3 of corresponding power battery.The SOC value rate of change of power battery and the charge power P3 of power battery are full Relationship shown in sufficient the following table 1.
Table 1
The SOC value rate of change of power battery 3 A1 A2 A3 A4 A5
The charge power P3 of power battery 3 B1 B2 B3 B4 B5
Known to table 1, when the SOC value rate of change got is A1, the charging of the corresponding power battery got Power P 3 is B1；When the SOC value rate of change got is A2, the charge power P3 of the corresponding power battery got is B2；When the SOC value rate of change got is A3, the charge power P3 of the corresponding power battery got is B3；When obtaining When the SOC value rate of change got is A4, the charge power P3 of the corresponding power battery got is B4；When what is got When SOC value rate of change is A5, the charge power P3 of the corresponding power battery got is B5.
Specifically, it when carrying out generated output control to auxiliary-motor, obtains vehicle driving power P11 in real time and electric appliance is set Standby power P 21, to obtain the vehicle demand power P2 of hybrid vehicle, and to the vehicle demand power P2 of hybrid vehicle Judged.It, can as vehicle demand power P2 minimum output power Pmins corresponding less than the optimal economic region of engine The charge power P3 of power battery is obtained according to the SOC value rate of change of power battery, and judges the charge power of power battery Whether P3 is less than or equal to the difference of minimum output power Pmin and vehicle demand power P2.
As vehicle demand power P2 minimum output power Pmins corresponding less than the optimal economic region of engine, if Differences of the charge power P3 of power battery less than minimum output power Pmin and vehicle demand power P2, i.e. P3 ＜ Pmin-P2, Then generated electricity with minimum output power Pmin to control the generated output of auxiliary-motor 1 by controlling engine；If power Differences of the charge power P3 of battery more than or equal to minimum output power Pmin and vehicle demand power P2, i.e. P3 >=Pmin-P2, Engine is then obtained in preset optimal economic region according to the sum of the charge power P3 of power battery and vehicle demand power P2 Interior output power, and generated electricity with the output power obtained to control the generated output of auxiliary-motor by controlling engine.
As a result, when vehicle demand power P2 is less than the corresponding minimum output power Pmin in optimal economic region of engine When, according to the charge power P3 of power battery minimum output power Pmins corresponding with the optimal economic region of engine and vehicle The generated output of the Relation acquisition engine of the difference of demand power P2, so that engine operates in preset optimal economic region, And engine is only generated electricity and is not involved in driving, so as to reduce the oil consumption of engine, and reduces the noise of engine.
In one embodiment of the second situation, when vehicle demand power P2 is more than or equal to the optimal economic area of engine The corresponding minimum output power Pmin in domain and less than or equal to auxiliary-motor maximum allowable generated output Pmax when, according to power battery SOC value rate of change obtain the charge power P3 of power battery, and according to the charge power P3 of power battery and vehicle demand The sum of power P 2 obtains output power P4 of the engine in preset optimal economic region, and by controlling engine to obtain The output power P4 taken generates electricity to control the generated output P1 of auxiliary-motor.
Specifically, when vehicle demand power P2 is more than or equal to the corresponding minimum output work in optimal economic region of engine Rate Pmin and less than auxiliary-motor maximum allowable generated output Pmax when, control engine be operated in preset optimal economic area The charge power P3 of power battery, and filling according to power battery are obtained when domain also according to the SOC value rate of change of power battery The sum of electrical power P 3 and vehicle demand power P2 obtain output power P4 of the engine in preset optimal economic region, In, the output power P4=P3+P2 of acquisition.In turn, control engine is generated electricity with the output power P4 obtained to control pair The generated output P1 of motor to make the SOC value of power battery increase, and makes engine be operated in preset optimal economic area Domain.
As a result, when vehicle demand power P2 is more than or equal to the corresponding minimum output power in optimal economic region of engine 1 Pmin and less than auxiliary-motor 5 maximum allowable generated output Pmax when, according to the charge power P3 of power battery 3 and vehicle demand The sum of power P 2 obtains the output power of engine 1, so that engine 1 operates in preset optimal economic region, and engine 1 It is only generated electricity and is not involved in driving, so as to reduce the oil consumption of engine, and reduce the noise of engine.
In one embodiment of the third situation, when vehicle demand power P2 is more than the maximum allowable power generation work(of auxiliary-motor When rate Pmax, also controls engine and participate in driving so that engine outputs power to wheel by clutch.
Specifically, when vehicle demand power P2 is more than maximum allowable generated output Pmax, that is, hybrid power vapour of auxiliary-motor When the vehicle demand power P2 of vehicle is higher than the generated output P1 of auxiliary-motor, also controls engine and outputted driving force to by clutch Wheel is so that engine participates in driving, to undertake part driving power P ＇ by engine, to reduce the power generation to auxiliary-motor The demand of power P 1 makes engine be operated in preset optimal economic region.
As a result, when vehicle demand power P2 is more than the maximum allowable generated output Pmax of auxiliary-motor, power battery is external Electric discharge to power motor to power, at this point, control power motor outputs power to the wheel of hybrid vehicle, so as to start Machine is operated in preset optimal economic region.
As described above, as shown in figure 11, the electricity-generating control method of the hybrid vehicle of the embodiment of the present invention is to secondary electricity The generated output of machine is adjusted, and specifically includes following steps：
S401：Control auxiliary-motor enters generated output shaping modes.
S402：Obtain the SOC value rate of change of the vehicle demand power P2 and power battery of hybrid vehicle.
S403：When vehicle demand power P2 is less than the corresponding minimum output power Pmin in optimal economic region of engine When, the charge power P3 of power battery is obtained according to the SOC value rate of change of power battery.
S404：When the charge power P3 of power battery is less than the difference of minimum output power Pmin and vehicle demand power P2 When, it is generated electricity with minimum output power Pmin to control the generated output of auxiliary-motor by controlling engine.
S405：When the charge power P3 of power battery is more than or equal to minimum output power Pmin and vehicle demand power P2 Difference when, according to the sum of the charge power P3 of power battery and vehicle demand power P2 obtain engine in preset optimal economic Output power P4 in region, and generated electricity with the power P 4 obtained to control the power generation work(of auxiliary-motor by controlling engine Rate P1.
S406：When vehicle demand power P2 is more than or equal to the corresponding minimum output power in optimal economic region of engine Pmin and less than or equal to auxiliary-motor maximum allowable generated output Pmax when, according to the SOC value rate of change of power battery obtain The charge power P3 of power battery, and engine is obtained according to the sum of the charge power P3 of power battery and vehicle demand power P2 Output power P4 in preset optimal economic region, and sent out with the output power P4 obtained by controlling engine Electricity is to control the generated output P1 of auxiliary-motor.
S407：When vehicle demand power P2 is more than the maximum allowable generated output Pmax of auxiliary-motor, control engine ginseng With driving so that engine outputs power to wheel by clutch.
In low speed, engine can be operated in economic zone as a result, and only power generation is not involved in driving, from without the use of from Clutch reduces clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improves comfort, and reduce oil consumption, reduction is started Machine noise, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, promote vehicle performance.
As described above, as shown in figure 12, the electricity-generating control method of the hybrid vehicle of the embodiment of the present invention specifically includes Following steps：
S501：Obtain the vehicle velocity V of the SOC value M and hybrid vehicle of power battery.
S502：Judge whether the vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1.
If so, thening follow the steps S503；If not, thening follow the steps S504.
S503：Judge whether the SOC value M of power battery is less than or equal to the first preset value M1.
If so, thening follow the steps S507；If not, thening follow the steps S506.
S504：Judge whether the SOC value M of power battery is less than or equal to the first preset value M1.
If so, thening follow the steps S505；If not, thening follow the steps S506.
S505：It controls engine and participates in driving.
S506：Control engine does not drive auxiliary-motor to generate electricity.
S507：Obtain the vehicle resistance F of the gas pedal depth D and hybrid vehicle of hybrid vehicle.
S508：Judge whether gas pedal depth D is more than the vehicle resistance of the first predetermined depth D1 or hybrid vehicle Whether power F is more than the first default resistance F1 or whether the SOC value M of power battery is less than preset limiting value M2.
If so, thening follow the steps S505；If not, thening follow the steps S509.
S509：Obtain the vehicle demand power P2 of hybrid vehicle.
S510：Judge whether vehicle demand power P2 is less than or equal to the maximum allowable generated output Pmax of auxiliary-motor.
If so, thening follow the steps S511；If not, thening follow the steps S505.
S511：Control driven by engine auxiliary-motor generates electricity, and engine is not involved in driving.
S512：Judge whether vehicle demand power P2 is less than the corresponding minimum output power in optimal economic region of engine Pmin。
If so, thening follow the steps S513；If not, thening follow the steps S514.
S513：The charge power P3 of power battery is obtained according to the SOC value rate of change of power battery, and executes step S515。
S514：The charge power P3 of power battery is obtained according to the SOC value rate of change of power battery, and executes step S516。
S515：Judge whether the charge power P3 of power battery is less than minimum output power Pmin and vehicle demand power The difference of P2.
If so, thening follow the steps S517；If not, thening follow the steps S516.
S516：According to the sum of the charge power P3 of power battery and vehicle demand power P2 obtain engine it is preset most Output power P4 in good economic zone, and generated electricity with the output power P4 obtained by controlling engine.
S517：It is generated electricity with minimum output power Pmin by controlling engine.
To sum up, the electricity-generating control method of hybrid vehicle according to the ... of the embodiment of the present invention first obtains the SOC of power battery Value and hybrid vehicle speed, according to the speed of the SOC value of power battery and hybrid vehicle deduct a part of pay recounter into Enter generated output shaping modes, so that engine operates in preset optimal economic region, so as to reduce the oil of engine Consumption, improves the economy of vehicle operation, and reduces engine noise, while can realize multiple drive modes, is able to maintain that Vehicle low speed electric equilibrium and low speed ride comfort promote vehicle performance.
The invention also provides a kind of computer readable storage mediums, have and are stored in instruction therein, when mixing is dynamic When the processor of power automobile executes instruction, hybrid vehicle executes the electricity-generating control method of above-described embodiment.
To sum up, computer readable storage medium according to the ... of the embodiment of the present invention, when the processor of hybrid vehicle executes When instruction, hybrid vehicle executes above-mentioned electricity-generating control method, can reduce the oil consumption of engine, improves the warp of vehicle operation Ji property, and engine noise is reduced, while can realize multiple drive modes, it is able to maintain that vehicle low speed electric equilibrium and low speed Ride comfort promotes vehicle performance.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc. Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned Embodiment is changed, changes, replacing and modification.

Claims (26)

1. a kind of dynamical system of hybrid vehicle, which is characterized in that including：
Engine, the engine output power to the wheel of the hybrid vehicle by clutch；
Power motor, the power motor are used to output driving force to the wheel of the hybrid vehicle；
Power battery, the power battery are used to power to the power motor；
DC-DC converter；
The auxiliary-motor being connected with the engine, the auxiliary-motor respectively with the power motor, the DC-DC converter and dynamic Power battery is connected, and the auxiliary-motor generates electricity under the drive of the engine；
Control module, the control module are used to obtain the speed of the SOC value and the hybrid vehicle of the power battery, And the generated output of the auxiliary-motor is controlled according to the speed of the SOC value of the power battery and the hybrid vehicle, with And the generated output of the engine obtained according to the generated output of the auxiliary-motor with control the engine operate in it is default Optimal economic region.
2. the dynamical system of hybrid vehicle as described in claim 1, which is characterized in that the control module is used for：When When the SOC value of the power battery is more than preset limiting value and is less than or equal to the first preset value, if the hybrid power vapour The speed of vehicle is less than the first preset vehicle speed, then controls the generated output of the auxiliary-motor.
3. the dynamical system of hybrid vehicle as claimed in claim 2, which is characterized in that the control module is additionally operable to： When the SOC value of the power battery is more than preset limiting value and is less than or equal to the first preset value and the hybrid power vapour When the speed of vehicle is less than the first preset vehicle speed, the vehicle demand power of the hybrid vehicle is obtained, and need in the vehicle When power being asked to be less than or equal to the maximum allowable generated output of the auxiliary-motor, the generated output of the auxiliary-motor is controlled.
4. the dynamical system of hybrid vehicle as claimed in claim 3, which is characterized in that the control module is additionally operable to： When the SOC value of the power battery is more than preset limiting value and less than or equal to the first preset value, the hybrid vehicle Speed is less than the first preset vehicle speed and the vehicle demand power is less than or equal to the maximum allowable generated output of the auxiliary-motor When, the gas pedal depth of the hybrid vehicle and the vehicle resistance of the hybrid vehicle are obtained, and in the oil Door tread depths are less than or equal to the first predetermined depth and the vehicle resistance of the hybrid vehicle is less than or equal to the first pre- handicapping When power, then the generated output of the auxiliary-motor is controlled.
5. the dynamical system of the hybrid vehicle as described in any one of claim 1-4, which is characterized in that the control mould Block is additionally operable to：According to the charge power of the vehicle demand power of the hybrid vehicle and the power battery to the secondary electricity The generated output of machine is controlled.
6. the dynamical system of hybrid vehicle as claimed in claim 5, which is characterized in that according to the hybrid vehicle Vehicle demand power and the power battery the charge power generated output that controls the auxiliary-motor formula it is as follows：
P1=P2+P3, wherein P2=P11+P21,
P1 is the generated output of the auxiliary-motor, and P2 is vehicle demand power, and P3 is the charge power of power battery, and P11 is whole Vehicle driving power, P21 are electrical equipment power.
7. the dynamical system of hybrid vehicle as claimed in claim 6, which is characterized in that the control module is additionally operable to： The SOC value rate of change of the power battery is obtained, and according to the optimal economic of the vehicle demand power and the engine The SOC value rate of change of relationship and the power battery between the corresponding minimum output power in region controls the auxiliary-motor Generated output.
8. the dynamical system of hybrid vehicle as claimed in claim 7, which is characterized in that the control module is additionally operable to： When vehicle demand power minimum output power corresponding less than the optimal economic region of the engine, according to described dynamic The SOC value rate of change of power battery obtains the charge power of the power battery, and judges the charge power of the power battery Whether the difference of the minimum output power and the vehicle demand power is less than, wherein
If the charge power of the power battery is less than the difference of the minimum output power and the vehicle demand power, pass through The engine is controlled to be generated electricity with the minimum output power to control the generated output of the auxiliary-motor；
If the charge power of the power battery is more than or equal to the difference of the minimum output power and the vehicle demand power, The engine is obtained in preset best warp according to the sum of the charge power of the power battery and the vehicle demand power The output power to help in region, and generated electricity with the output power obtained to control the secondary electricity by controlling the engine The generated output of machine.
9. the dynamical system of hybrid vehicle as claimed in claim 7, which is characterized in that the control module is additionally operable to： When the vehicle demand power be more than or equal to the engine the corresponding minimum output power in optimal economic region and less than etc. When the maximum allowable generated output of the auxiliary-motor, the power is obtained according to the SOC value rate of change of the power battery The charge power of battery, and start according to described in the acquisition of the sum of the charge power of the power battery and the vehicle demand power Output power of the machine in preset optimal economic region, and carried out with the output power obtained by controlling the engine Power generation is to control the generated output of the auxiliary-motor.
10. the dynamical system of hybrid vehicle as claimed in claim 7, which is characterized in that the control module is additionally operable to： When the vehicle demand power is more than the maximum allowable generated output of the auxiliary-motor, also controls the engine and participate in driving So that the engine outputs power to the wheel by the clutch.
11. the dynamical system of hybrid vehicle as claimed in claim 4, which is characterized in that the control module is additionally operable to： When the SOC value of the power battery is less than or equal to preset limiting value, controls the engine and participate in driving so that the hair Motivation outputs power to the wheel by the clutch；
When the SOC value of the power battery is less than or equal to the first preset value, the speed of the hybrid vehicle is less than first in advance If speed and the gas pedal depth are more than the first predetermined depth, control the engine and participate in driving so that described start Machine outputs power to the wheel by the clutch；
When the SOC value of the power battery is less than or equal to the first preset value, the speed of the hybrid vehicle is less than first in advance If the vehicle resistance of speed and the hybrid vehicle is more than the first default resistance, the engine participates in driving so that institute It states engine and the wheel is output power to by the clutch.
12. the dynamical system of the hybrid vehicle as described in any one of claim 1-4, which is characterized in that the control Module is additionally operable to：When the control engine individually drives the auxiliary-motor to be generated electricity and controls the power motor alone When output driving power, the generated output of the engine is obtained according to following formula：
P0=P1/ η/ζ
Wherein, P0 is the generated output of the engine, and P1 is the generated output of auxiliary-motor, and η Belt Transmission Efficiencies, ζ is secondary electricity The efficiency of machine.
13. a kind of hybrid vehicle, which is characterized in that include the hybrid power vapour as described in any one of claim 1-11 The dynamical system of vehicle.
14. a kind of electricity-generating control method of hybrid vehicle, which is characterized in that include the following steps：
Obtain the speed of the SOC value and the hybrid vehicle of the power battery of the hybrid vehicle；
The pair electricity of the hybrid vehicle is controlled according to the speed of the SOC value of the power battery and the hybrid vehicle The generated output of machine；
The generated output that the engine of the hybrid vehicle is obtained according to the generated output of the auxiliary-motor, described in control Engine operates in preset optimal economic region, wherein the auxiliary-motor generates electricity under the drive of the engine.
15. the electricity-generating control method of hybrid vehicle as claimed in claim 14, which is characterized in that when the power battery SOC value be more than preset limiting value and less than or equal to the first preset value when, if the speed of the hybrid vehicle is less than First preset vehicle speed then controls the generated output of the auxiliary-motor.
16. the electricity-generating control method of hybrid vehicle as claimed in claim 15, which is characterized in that when the power battery SOC value be more than preset limiting value and be less than the less than or equal to the speed of the first preset value and the hybrid vehicle When one preset vehicle speed, also obtain the vehicle demand power of the hybrid vehicle, and be less than in the vehicle demand power etc. When the maximum allowable generated output of the auxiliary-motor, the generated output of the auxiliary-motor is controlled.
17. the electricity-generating control method of hybrid vehicle as claimed in claim 16, which is characterized in that when the power battery SOC value be more than preset limiting value and to be less than first less than or equal to the speed of the first preset value, the hybrid vehicle pre- If speed and the vehicle demand power are less than or equal to the maximum allowable generated output of the auxiliary-motor, also obtain described mixed The vehicle resistance of the gas pedal depth and the hybrid vehicle of power vehicle is closed, and is less than in the gas pedal depth When being less than or equal to the first default resistance equal to the vehicle resistance of the first predetermined depth and the hybrid vehicle, to the secondary electricity The generated output of machine is controlled.
18. the electricity-generating control method of the hybrid vehicle as described in any one of claim 14-17, which is characterized in that also Power generation according to the charge power of the vehicle demand power of the hybrid vehicle and the power battery to the auxiliary-motor Power is controlled.
19. the electricity-generating control method of hybrid vehicle as claimed in claim 18, which is characterized in that dynamic according to the mixing The vehicle demand power of power automobile and the charge power of the power battery control the formula of the generated output of the auxiliary-motor such as Under：
P1=P2+P3, wherein P2=P11+P21,
P1 is the generated output of the auxiliary-motor, and P2 is vehicle demand power, and P3 is the charge power of power battery, and P11 is whole Vehicle driving power, P21 are electrical equipment power.
20. the electricity-generating control method of hybrid vehicle as claimed in claim 19, which is characterized in that the auxiliary-motor Generated output is controlled, including：
Obtain the SOC value rate of change of the power battery, and according to the best of the vehicle demand power and the engine The SOC value rate of change of relationship and the power battery between the corresponding minimum output power in economic zone controls the pair The generated output of motor.
21. the electricity-generating control method of hybrid vehicle as claimed in claim 20, which is characterized in that when the vehicle demand When power is less than the corresponding minimum output power in optimal economic region of the engine, according to the SOC value of the power battery Rate of change obtains the charge power of the power battery, and judges whether the charge power of the power battery is less than the minimum The difference of output power and the vehicle demand power, wherein
If the charge power of the power battery is less than the difference of the minimum output power and the vehicle demand power, pass through The engine is controlled to be generated electricity with the minimum output power to control the generated output of the auxiliary-motor；
If the charge power of the power battery is more than or equal to the difference of the minimum output power and the vehicle demand power, The engine is obtained in preset best warp according to the sum of the charge power of the power battery and the vehicle demand power The output power to help in region, and generated electricity with the output power obtained to control the secondary electricity by controlling the engine The generated output of machine.
22. the electricity-generating control method of hybrid vehicle as claimed in claim 20, which is characterized in that when the vehicle demand Power is more than or equal to the corresponding minimum output power in optimal economic region of the engine and less than or equal to the auxiliary-motor When maximum allowable generated output, the charge power of the power battery is obtained according to the SOC value rate of change of the power battery, And the engine is obtained preset best according to the sum of the charge power of the power battery and the vehicle demand power Output power in economic zone, and generated electricity with described in control with the output power obtained by controlling the engine The generated output of auxiliary-motor.
23. the electricity-generating control method of hybrid vehicle as claimed in claim 20, which is characterized in that when the vehicle demand When power is more than the maximum allowable generated output of the auxiliary-motor, also controls the engine and participate in driving so that the engine The wheel of the hybrid vehicle is output power to by clutch.
24. the electricity-generating control method of hybrid vehicle as claimed in claim 17, which is characterized in that wherein,
When the SOC value of the power battery is less than or equal to preset limiting value, also control the engine participate in driving so that The engine outputs power to the wheel of the hybrid vehicle by clutch；
When the SOC value of the power battery is less than or equal to the first preset value, the speed of the hybrid vehicle is less than first in advance If speed and the gas pedal depth are more than the first predetermined depth, also control the engine and participate in driving so that the hair Motivation outputs power to the wheel by the clutch；
When the SOC value of the power battery is less than or equal to the first preset value, the speed of the hybrid vehicle is less than first in advance If the vehicle resistance of speed and the hybrid vehicle is more than the first default resistance, also controls the engine and participate in driving So that the engine outputs power to the wheel by the clutch.
25. the electricity-generating control method of the hybrid vehicle as described in any one of claim 14-17, which is characterized in that when Control the engine individually drive the auxiliary-motor to be generated electricity and control the power motor alone output driving power when, The generated output of the engine is obtained according to following formula：
P0=P1/ η/ζ
Wherein, P0 is the generated output of the engine, and P1 is the generated output of auxiliary-motor, and η Belt Transmission Efficiencies, ζ is secondary electricity The efficiency of machine.
26. a kind of computer readable storage medium, which is characterized in that have and be stored in instruction therein, when described instruction is held When row, the hybrid vehicle executes the electricity-generating control method as described in any one of claim 14-25.
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