CN104589996A - Drive method for hybrid power vehicle - Google Patents
Drive method for hybrid power vehicle Download PDFInfo
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- CN104589996A CN104589996A CN201510050166.9A CN201510050166A CN104589996A CN 104589996 A CN104589996 A CN 104589996A CN 201510050166 A CN201510050166 A CN 201510050166A CN 104589996 A CN104589996 A CN 104589996A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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Abstract
The invention discloses a drive method for a hybrid power vehicle. The hybrid power vehicle is provided with an internal combustion engine, first electric equipment operating independent of the internal combustion engine, second electric equipment directly connected to the internal combustion engine and a high-voltage battery; the hybrid power vehicle is driven by at least three drive modes including a first drive mode of driving by the first electric equipment, a second drive mode of driving by the internal combustion engine and a third drive mode of driving by the first electric equipment, the second electric equipment and the internal combustion engine. The drive method disclosed by the invention comprises the following steps: detecting a power demand of a driver and a charging state of the high-voltage battery; comparing the detected power demand of the driver and the detected charging state with a predefined mode conversion threshold so as to obtain a comparison result, wherein the predefined mode conversion threshold is a function of the power demand of the driver and the charging state; selecting the corresponding drive mode according to the comparison result so as to drive the hybrid power vehicle.
Description
Technical field
The present invention relates generally to vehicle electric field, relates to a kind of driving method for motor vehicle driven by mixed power particularly.
Background technology
Usually, motor vehicle driven by mixed power has two electrical equipments.One of them electrical equipment is mainly used in driving vehicle and energy regenerating, and independent of internal combustion engine, namely drive motor vehicle driven by mixed power by means of only this electrical equipment, and combustion engine can not provide the power of driving.Another electrical equipment directly joins combustion engine to, and it can help to drive vehicle and energy regenerating, and the energy of combustion engine also can be utilized to come for high-tension battery charging.These two electrical equipments can be set to engage with same change-speed box, are called " double mode " hybrid electric vehicle, also can be connected respectively to front axle or the rear axle of vehicle, are called " road general formula " hybrid electric vehicle.
Under the driving of above-mentioned two electrical equipments and combustion engine, hybrid vehicle control system performs different functions to reach best fuel efficiency according to set priority level usually.Such as perform according to following priority level: 1) general internal combustion engine drives, and it is normal mode of operation for automatic transmission change-speed box, for required combustion engine powered output, this pattern is most actv. operational mode; 2) energy regenerating, catches as much as possible and store kinetic energy during braking; 3) electric drive, when motivation level is lower, avoids using combustion engine; 4) start/stop, when required Power output is zero, combustion engine quits work; 5) intelligent charge, selects most suitable condition of service, with the electrical generator by being connected to combustion engine for high-tension battery charges; 6) charge level management, the charge level scope making high-tension battery reach predetermined, can provide required function; 7) unnecessary high-tension battery circulation is avoided.
But above-mentioned sortord does not consider how to meet the different demands of driver for transmission power, provide level and smooth transition and make the problems such as occurred component wear minimizes during each patten transformation.
Summary of the invention
In view of the above problems, propose the present invention, to provide a kind of driving method for motor vehicle driven by mixed power, to overcome the problems referred to above or to solve the problem at least in part.
According to a first aspect of the present invention, provide a kind of driving method for motor vehicle driven by mixed power, described motor vehicle driven by mixed power have combustion engine, the first electrical equipment run, the second electrical equipment directly joining described combustion engine to and high-tension battery independent of described combustion engine; Described motor vehicle driven by mixed power is driven with at least three kinds of drive patterns, and described at least three kinds of drive patterns comprise: the first drive pattern driven by described first electrical equipment, by described ICE-powered second drive pattern and by described first electrical equipment, described second electrical equipment and described ICE-powered the 3rd drive pattern; Described method comprises: the charge condition detecting driver's power demand and described high-tension battery; By detected driver's power demand with detected charge condition compared with predetermined patten transformation threshold value, to obtain comparative result, wherein said predetermined patten transformation threshold value is the function of driver's power demand and charge condition; And select drive pattern, to drive described motor vehicle driven by mixed power according to described comparative result.
According to an embodiment of the present invention, wherein said predetermined patten transformation threshold value is multiple patten transformation threshold values, and when detected driver's power demand and detected charge condition reach one in described multiple patten transformation threshold value, the drive pattern of described motor vehicle driven by mixed power is converted to another kind of drive pattern from a kind of drive pattern described at least three kinds of drive patterns.
According to an embodiment of the present invention, wherein said first drive pattern comprise in following pattern one or more: energy recuperation mode, wherein by described first electrical equipment catch described motor vehicle driven by mixed power kinetic energy and by caught kinetic transformation be electrical power storage in described high-tension battery, think that described high-tension battery charges; Sliding mode, the propulsive effort wherein provided by described first electrical equipment is zero; And electric drive mode, wherein only drive described motor vehicle driven by mixed power by described first electrical equipment.
According to an embodiment of the present invention, wherein said second drive pattern comprise in following pattern one or more: charge mode, wherein said combustion engine provides energy and described second electrical equipment is the charging of described high-tension battery for described second electrical equipment; Internal combustion engine drive pattern, wherein only by motor vehicle driven by mixed power described in described internal combustion engine drive; With propelling pattern, wherein jointly drive described motor vehicle driven by mixed power by described combustion engine and described second electrical equipment.
According to an embodiment of the present invention, wherein said predetermined patten transformation threshold value is the function of the horsepower output of described combustion engine, described first electrical equipment or the second electrical equipment.
According to an embodiment of the present invention, wherein said predetermined patten transformation threshold value is the function of the speed of described motor vehicle driven by mixed power.
According to an embodiment of the present invention, described method also comprises: according to the charge level of predetermined high-tension battery in described at least three kinds of drive patterns, calibrates described predetermined patten transformation threshold value.
According to an embodiment of the present invention, described method also comprises: according to the predetermined conversion times being converted to described another kind of drive pattern from described a kind of drive pattern, calibrates described predetermined patten transformation threshold value.
According to an embodiment of the present invention, wherein said a kind of drive pattern is converted to described another kind of drive pattern is be converted to by described ICE-powered second drive pattern from described first drive pattern.
According to an embodiment of the present invention, wherein when described charge condition increases, predetermined patten transformation threshold value corresponding when being converted to described second drive pattern from described first drive pattern increases.
According to an embodiment of the present invention, wherein said predetermined patten transformation threshold value comprises calibration function or tables look-up, and when described charge condition changes, described calibration function or table look-up changes continuously.
According to an embodiment of the present invention, wherein said predetermined patten transformation threshold value comprises calibration function or tables look-up, and when the speed of described motor vehicle driven by mixed power changes, described calibration function or table look-up changes continuously.
In a word, the driving method for motor vehicle driven by mixed power that embodiments of the present invention provide, can provide required driver's power demand, can be converted to another kind of drive pattern smoothly as required from a kind of drive pattern simultaneously; The selection of drive pattern can be made not only based on the charge condition of high-tension battery, also fully with reference to the operating efficiency of combustion engine, thus the driveability of motor vehicle driven by mixed power can be optimized significantly, improve the conversion efficiency of fuel oil and electric energy; Can make patten transformation lentamente, can repeatedly carry out, avoid driver to be subject to the interference of patten transformation, thus realize better traveling comfort and better Consumer's Experience; The number of times of patten transformation can be made minimum, contribute to the wearing and tearing and the friction that reduce mechanical inter-module, and reduce the noise of patten transformation, vibration and uneven compliance.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of specification sheets, and can become apparent, below especially exemplified by the specific embodiment of the present invention to allow above and other objects of the present invention, feature and advantage.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Fig. 1 be according to an embodiment of the present invention in for the diagram of circuit of the driving method 100 of motor vehicle driven by mixed power;
Fig. 2 is the schematic diagram of middle according to an embodiment of the present invention internal combustion engine operation efficiency with driver's power demand variation relation;
Fig. 3 is the schematic diagram of the predetermined patten transformation threshold value according to an exemplary embodiment of the present invention; And
Fig. 4 A-4C shows the schematic diagram of each drive pattern and predetermined patten transformation threshold value under the different charge conditions according to exemplary embodiment of the present invention.
Detailed description of the invention
Below with reference to accompanying drawings illustrative embodiments of the present disclosure is described in more detail.Although show illustrative embodiments of the present disclosure in accompanying drawing, however should be appreciated that can realize the disclosure in a variety of manners and not should limit by the embodiment of setting forth here.On the contrary, provide these embodiments to be in order to more thoroughly the disclosure can be understood, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.But achieve the present invention although should be appreciated that those skilled in the art can dream up clearly not describe in this manual or record and be included in the various structures in spirit of the present invention, principle and scope.The all examples quoted from this specification sheets and conditional language are all for the object illustrated and instruct, principle prior art contributed to help reader understanding contriver and concept, and should be understood to be not limited to these the specifically example of citation and conditions.In addition, in order to be illustrated more clearly in, the detailed description for known devices, circuit and method is eliminated, not obscure description of the invention.Should be understood that unless stated otherwise, the feature in each embodiment described herein can combine mutually.
The quantity of each parts cited by it will be understood by those skilled in the art that in exemplary embodiment of the present invention is only for illustrative purposes, and not should be understood to limitation of the present invention.In the present invention, each parts can have other quantity, and do not depart from scope of the present invention.
In this manual, the function of each unit can realize by using specialized hardware or the hardware performing process that can combine with suitable software.Such hardware or specialized hardware can comprise special IC (ASIC), various other circuit, various treaters etc.When being realized by treater, this function can be provided by single application specific processor, single share processor or multiple independently treater (wherein some may be shared).In addition, treater should not be understood to specially to refer to can the hardware of executive software, but impliedly can comprise and be not limited to digital signal processor (DSP) hardware, be used for the read-only memory (ROM) (ROM) of storing software, random access memory (RAM) and non-volatile memory apparatus.
According to a first aspect of the invention, a kind of driving method 100 for motor vehicle driven by mixed power is provided.
Described motor vehicle driven by mixed power has combustion engine, the first electrical equipment run, the second electrical equipment directly joining described combustion engine to and high-tension battery independent of described combustion engine.Alternatively, the second electrical equipment can be the electrical generator of Integrated Starter electrical generator (ISG), tape starting electrical generator (BSG) or the gear drive by change-speed box.Alternatively, the first electrical equipment and the second electrical equipment can be configured to join the same axle of motor vehicle driven by mixed power or different axles to.The annexation of above-mentioned each unit is only example, and those skilled in the art can adopt other annexation completely, as long as each unit also can realize function of the present invention under such annexation.
Described motor vehicle driven by mixed power is driven with at least three kinds of drive patterns, and described at least three kinds of drive patterns comprise: the first drive pattern driven by described first electrical equipment, by described ICE-powered second drive pattern, and by described first electrical equipment, described second electrical equipment and described ICE-powered the 3rd drive pattern.Motor vehicle driven by mixed power manages and controls the first electrical equipment, the second electrical equipment, combustion engine and high-tension battery by above-mentioned drive pattern, required driver's power demand can be provided, can be converted to another kind of drive pattern from a kind of drive pattern as required, wherein patten transformation relates to the processes such as starting apparatus combustion engine, joined speed variator or power-transfer clutch simultaneously.
Fig. 1 shows the diagram of circuit of the driving method 100 for motor vehicle driven by mixed power according to a non-limiting and exemplary embodiment of the present invention.As shown in Figure 1, method 100 starts from step S110: the charge condition (SOC) detecting driver's power demand and described high-tension battery.Alternatively, driver's power demand can detect driver's Das Gaspedal by the control unit for vehicle of described motor vehicle driven by mixed power and step on amplitude acquisition, the charge condition of high-tension battery can read battery management system (BMS) data by control unit for vehicle and realize, described charge condition can be the absolute charge condition (0-100% of the total electricity of high-tension battery) of high-tension battery, also can be the available charge condition (such as, the 30%-70% of the total electricity of high-tension battery) of high-tension battery.
As shown in Figure 1, after step S110, carry out step S120: by detected driver's power demand with detected charge condition compared with predetermined patten transformation threshold value, to obtain comparative result, wherein said predetermined patten transformation threshold value is the function of driver's power demand and charge condition.Alternatively, predetermined patten transformation threshold value also can be the function of other parameters of motor vehicle driven by mixed power, such as wheel torque.By predetermined patten transformation threshold value being set to the function of driver's power demand and charge condition, the selection of drive pattern can be made not only based on the charge condition of high-tension battery, also can fully with reference to the operating efficiency of combustion engine, thus optimize the driveability of motor vehicle driven by mixed power significantly, improve the conversion efficiency of fuel oil and electric energy.
Fig. 2 is the schematic diagram that internal combustion engine operation efficiency changes with driver's power demand when the charge condition of high-tension battery mediates value according to exemplary embodiment of the present invention.
It will be understood by those skilled in the art that as will be described in detail below, predetermined patten transformation threshold value can change along with charge condition; Only for the predetermined patten transformation threshold value under mediating value situation at the charge condition of high-tension battery in Fig. 2, the schematic diagram that internal combustion engine operation efficiency changes with driver's power demand is exemplarily described; When high-tension battery is in other charge conditions, other variation relation between predetermined patten transformation threshold value and charge condition, can be had.
As shown in Figure 2, the operating efficiency of combustion engine is in fact the function of driver's power demand, and when driver's power demand is in the scope of 0-10kW, the operating efficiency of combustion engine increases along with the increase of driver's power demand; When driver's power demand is about 30kW, combustion engine reaches its peak value operating efficiency about 37%; When driver's power demand is greater than 50kW, the operating efficiency of combustion engine reduces along with the increase of driver's power demand.According to exemplary embodiment of the present invention, predetermined patten transformation threshold value can be set to the function of driver's power demand, as in Fig. 2, when driver's power demand is less than about 6kW, the operating efficiency of combustion engine is lower, then motor vehicle driven by mixed power is driven with the first drive pattern, is namely driven by the first electrical equipment; When driver's power demand is more than or equal to 6kW and is less than 113kW, the operating efficiency of combustion engine significantly increases, then motor vehicle driven by mixed power is driven, namely by internal combustion engine drive with the second drive pattern; When driver's power demand is more than or equal to 113kW, motor vehicle driven by mixed power is driven with the 3rd drive pattern, namely by described ICE-powered second drive pattern and by described first electrical equipment, described second electrical equipment and described internal combustion engine drive.Thus, by predetermined patten transformation threshold value being set to the function of driver's power demand, the selection of drive pattern can be made fully with reference to the operating efficiency of combustion engine, thus the driveability of motor vehicle driven by mixed power can be optimized significantly, improve the conversion efficiency of fuel oil.
Similarly, when arranging predetermined patten transformation threshold value, can simultaneously with reference to the charge condition of driver's power demand and high-tension battery, be set to the function of driver's power demand and charge condition, thus optimize further the driveability of motor vehicle driven by mixed power and improve the conversion efficiency of fuel oil and electric energy.
Refer again to Fig. 1, after step S120, perform step S130: select drive pattern, to drive described motor vehicle driven by mixed power according to described comparative result.
According to an illustrative embodiment of the invention, described predetermined patten transformation threshold value is multiple patten transformation threshold values, and when detected driver's power demand and detected charge condition reach one in described multiple patten transformation threshold value, the drive pattern of described motor vehicle driven by mixed power is converted to another kind of drive pattern from a kind of drive pattern described at least three kinds of drive patterns.
Fig. 3 is the schematic diagram of the predetermined patten transformation threshold value according to an exemplary embodiment of the present invention.As shown in Figure 3, predetermined patten transformation threshold value is the function of driver power demand y and charge condition x, and predetermined patten transformation threshold value is multiple patten transformation threshold values, such as F
aB(x, y) and F
bC(x, y), wherein F
aB(x, y) is the patten transformation threshold value being converted to the second drive pattern from the first drive pattern, F
bC(x, y) is the patten transformation threshold value being converted to the 3rd drive pattern from the second drive pattern.Alternatively, wherein the minimum value of charge condition x and maxim, can be that the minimum value of available charge condition is to maxim.Under same charge condition, according to different driver's power demand, different drive patterns will be selected, and when charge condition changes, the driver's power demand corresponding to pattern switches also will change.
When detected driver's power demand and detected charge condition all do not reach predetermined patten transformation threshold value F
aBtime (x, y), select the first drive pattern, to drive described motor vehicle driven by mixed power; When detected driver's power demand and detected charge condition reach predetermined patten transformation threshold value F
aBtime (x, y), the drive pattern of motor vehicle driven by mixed power is converted to the second drive pattern from the first drive pattern.That is, detect that the current charge condition x of vehicle is a, according to patten transformation threshold value F
aB(x, y), corresponding driver's power demand is b, if detect that current drivers's power demand is less than b, selects the first drive pattern, if detect that current drivers's power demand is greater than b, selects the second drive pattern.Alternatively, F
aB(x, y) corresponds to lower driver's power demand; And along with the increase of charge condition, corresponding driver's power demand also increases thereupon.
When detected driver's power demand and detected charge condition all reach predetermined patten transformation threshold value F
aB(x, y) but do not reach F
bCtime (x, y), select the second drive pattern, to drive described motor vehicle driven by mixed power; When detected driver's power demand and detected charge condition reach predetermined patten transformation threshold value F
bCtime (x, y), the drive pattern of motor vehicle driven by mixed power is converted to the 3rd drive pattern from the second drive pattern.Alternatively, F
bC(x, y) corresponds to higher driver's power demand; When charge condition is lower, along with the increase of charge condition, predetermined patten transformation threshold value F
bCdriver's power demand corresponding to (x, y) also increases thereupon; And when charge condition reaches x
1time, predetermined patten transformation threshold value F
bCdriver's power demand corresponding to (x, y) keeps constant.
Alternatively, predetermined patten transformation threshold value changes smoothly along with the change of charge condition, make the patten transformation from a drive pattern to another drive pattern can lentamente, can repeatedly carry out, avoid driver to be subject to the interference of patten transformation, thus realize better traveling comfort and better Consumer's Experience.
According to an illustrative embodiment of the invention, described first drive pattern comprises one or more in following pattern: energy recuperation mode, sliding mode, and electric drive mode.As shown in Figure 3, in energy recuperation mode 2, by described first electrical equipment catch described motor vehicle driven by mixed power kinetic energy and by caught kinetic transformation be electrical power storage in described high-tension battery, think that described high-tension battery charges.In sliding mode 1, the propulsive effort provided by described first electrical equipment is zero; Alternatively, when motor vehicle driven by mixed power is in low speed driving, when namely not accelerating also not brake, be in sliding mode 1.In electric drive mode 3, only drive described motor vehicle driven by mixed power by described first electrical equipment.Alternatively, corresponding in energy recuperation mode 2, sliding mode 1 and electric drive mode 3 driver's power demand increases successively.
Fig. 4 A-4C shows the schematic diagram of each drive pattern and predetermined patten transformation threshold value under the different charge conditions according to exemplary embodiment of the present invention.
Alternatively, the first drive pattern can comprise energy recuperation mode, sliding mode, and one or more in electric drive mode.
Such as, when the charge condition of high-tension battery is lower, as being less than 10% of available power maxim, as shown in Figure 4 A, high-tension battery cannot by electric drive mode 3 for the first electrical equipment provides power to drive motor vehicle driven by mixed power, but still the kinetic energy of described motor vehicle driven by mixed power can be caught by energy recuperation mode 2 by the first electrical equipment and be that electrical power storage is in described high-tension battery by caught kinetic transformation, think that described high-tension battery charges, now, first drive pattern comprises energy recuperation mode 2 and sliding mode 1, and does not comprise electric drive mode 3; Wherein in energy recuperation mode 2 and sliding mode 1, the horsepower output of the first electrical equipment is as straight line L
21shown in.
When the charge condition of high-tension battery mediates value, as be in available power maxim 25% to 75% time, as shown in Figure 4 B, namely high-tension battery by electric drive mode 3 for the first electrical equipment provides power to drive motor vehicle driven by mixed power, also can be charged by energy recuperation mode 2; Now, the first drive pattern comprises energy recuperation mode 2, sliding mode 1 and electric drive mode 3; Wherein in energy recuperation mode 2, sliding mode 1 and electric drive mode 3, the horsepower output of the first electrical equipment is as straight line L
213shown in.
When the charge condition of high-tension battery is higher, as be in available power maxim 90% to 100% time, as shown in Figure 4 C, high-tension battery is no longer charged by the first electrical equipment by energy recuperation mode 2, but can by electric drive mode 3 for the first electrical equipment provides power to drive motor vehicle driven by mixed power; Now, the first drive pattern comprises electric drive mode 3 and sliding mode 1, and does not comprise energy recuperation mode 2; Wherein in electric drive mode 3 and sliding mode 1, the horsepower output of the first electrical equipment is as straight line L
13shown in.
According to an illustrative embodiment of the invention, described second drive pattern comprises one or more in following pattern: charge mode, internal combustion engine drive pattern and the pattern of propelling.As shown in Figure 3, in charge mode 4, described combustion engine for described second electrical equipment energy is provided and described second electrical equipment be described high-tension battery charging, the minimum power that the horsepower output of the second electrical equipment is reached needed for peak value operating efficiency by performance and the combustion engine of the second electrical equipment itself limited, by described combustion engine for described second electrical equipment provides energy, again by the second electrical equipment be described high-tension battery charge, charge to high-tension battery immediately with quite high power after avoiding internal combustion engine start, but along with the increase of driver's power demand, by level and smooth and unidirectional patten transformation be high-tension battery charging, thus decrease the noise of patten transformation, vibration and uneven compliance, user is not easily discovered, obtain higher traveling comfort and better Consumer's Experience.In internal combustion engine drive pattern 5, wherein only by motor vehicle driven by mixed power described in described internal combustion engine drive.In propelling pattern 6, wherein jointly drive described motor vehicle driven by mixed power by described combustion engine and described second electrical equipment.Alternatively, corresponding in charge mode 4, internal combustion engine drive pattern 5 and propelling pattern 6 driver's power demand increases successively.
Alternatively, the second drive pattern can comprise one or more in charge mode 4, internal combustion engine drive pattern 5 and propelling pattern 6.
Such as, when the charge condition of high-tension battery is lower, as being less than 10% of available power maxim, as shown in Figure 4 A, the second electrical equipment is high-tension battery charging, and cannot jointly drive motor vehicle driven by mixed power by propelling pattern 6 and combustion engine; Now, the second drive pattern comprises charge mode 4 and internal combustion engine drive pattern 5, and does not comprise propelling pattern 6; The patten transformation threshold value F of the second drive pattern is converted to from the first drive pattern
aB(x, y) equals the patten transformation threshold value F being converted to charge mode 4 from sliding mode 1
14(x, y), and be F from the patten transformation threshold value that charge mode 4 is converted into internal combustion engine drive pattern 5
45(x, y).Wherein, in charge mode 4 and internal combustion engine drive pattern 5, the horsepower output of combustion engine is as broken line L
45shown in; A part for the horsepower output of combustion engine is as broken line L
4shown in, for being the second electrical equipment charging in charge mode 4; Another part of the horsepower output of combustion engine is as straight line L '
45shown in, for driving described motor vehicle driven by mixed power in charge mode 4 and internal combustion engine drive pattern 5.Along with the increase of driver's power demand, the horsepower output of combustion engine reaches its maximum output power, as straight line L
maxshown in, then combustion engine with its maximum output power for motor vehicle driven by mixed power provides constant power, to drive described motor vehicle driven by mixed power.
When the charge condition of high-tension battery mediates value, as be in available power maxim 25% to 75% time, as shown in Figure 4 B, can by combustion engine, for the second electrical equipment provides energy to think, high-tension battery charges by charge mode 4, by internal combustion engine drive pattern 5 by internal combustion engine drive motor vehicle driven by mixed power, also can jointly drive described motor vehicle driven by mixed power by propelling pattern 6 by described combustion engine and described second electrical equipment; Now, the second drive pattern comprises charge mode 4, internal combustion engine drive pattern 5 and propelling pattern 6.The patten transformation threshold value F of the second drive pattern is converted to from the first drive pattern
aB(x, y) equals the patten transformation threshold value F being converted to charge mode 4 from electric drive mode 3
34(x, y), the patten transformation threshold value being converted into internal combustion engine drive pattern 5 from charge mode 4 is F
45(x, y).Wherein in charge mode 4 and internal combustion engine drive pattern 5, the horsepower output of combustion engine is as broken line L
45shown in; A part for the horsepower output of combustion engine is as broken line L
4shown in, for being the second electrical equipment charging in charge mode 4; Another part of the horsepower output of combustion engine is as straight line L '
45shown in, for driving described motor vehicle driven by mixed power in charge mode 4 and internal combustion engine drive pattern 5.As shown in Figure 4 B, the second drive pattern is converted to the patten transformation threshold value F of the 3rd drive pattern
bC(x, y) equals the switching threshold F being converted to the 3rd drive pattern 7 from propelling pattern 6
67(x, y).Along with the increase of driver's power demand, the horsepower output of combustion engine reaches its maximum output power as straight line L
maxshown in, then combustion engine in propelling pattern 6 and the 3rd drive pattern 7 with its maximum output power for motor vehicle driven by mixed power provides constant power, to drive described motor vehicle driven by mixed power.In propelling pattern 6 and the 3rd drive pattern 7, the horsepower output of the second electrical equipment is as broken line L
67shown in.In the 3rd drive pattern 7, the horsepower output of the first electrical equipment is as straight line L
7shown in.In propelling pattern 6 and the 3rd drive pattern 7, the total horsepower output of described first electrical equipment, described second electrical equipment and described ICE-powered is as straight line L '
67shown in.
When the charge condition of high-tension battery is higher, as being greater than 90% of available power maxim, as shown in Figure 4 C, high-tension battery is no longer charged by the second electrical equipment by charge mode 4, but can drive motor vehicle driven by mixed power by internal combustion engine drive pattern 5 and propelling pattern 6; Now, the second drive pattern comprises internal combustion engine drive pattern 5 and propelling pattern 6, and does not comprise charge mode 4.The patten transformation threshold value F of the second drive pattern is converted to from the first drive pattern
aB(x, y) equals the patten transformation threshold value F being converted to internal combustion engine drive pattern 5 from electric drive mode 3
35(x, y), the patten transformation threshold value being converted into propelling pattern 6 from internal combustion engine drive pattern 5 is F
56(x, y).Wherein in internal combustion engine drive pattern 5, the horsepower output of combustion engine is as straight line L
5shown in.As shown in Figure 4 C, the second drive pattern is converted to the patten transformation threshold value F of the 3rd drive pattern
bC(x, y) equals the switching threshold F being converted to the 3rd drive pattern 7 from propelling pattern 6
67(x, y).Along with the increase of driver's power demand, the horsepower output of combustion engine reaches its maximum output power as straight line L
maxshown in, then combustion engine in propelling pattern 6 and the 3rd drive pattern 7 with its maximum output power for motor vehicle driven by mixed power provides constant power, to drive described motor vehicle driven by mixed power.In propelling pattern 6 and the 3rd drive pattern 7, the horsepower output of the second electrical equipment is as broken line L
67shown in.In the 3rd drive pattern 7, the horsepower output of the first electrical equipment is as straight line L
7shown in.In propelling pattern 6 and the 3rd drive pattern 7, the total horsepower output of described first electrical equipment, described second electrical equipment and described ICE-powered is as straight line L '
67shown in.
By the drive pattern by motor vehicle driven by mixed power, sliding mode 1 as escribed above, energy recuperation mode 2, electric drive mode 3, charge mode 4, internal combustion engine drive pattern 5, propelling pattern 6 etc., be combined as the first drive pattern, the second drive pattern and the 3rd drive pattern, make the number of times relating to power-transfer clutch and the patten transformation do not related between power-transfer clutch and the patten transformation between internal combustion engine start and closedown minimum, contribute to the wearing and tearing and the friction that reduce mechanical inter-module, and reduce the noise of patten transformation, vibration and uneven compliance.
According to an illustrative embodiment of the invention, described predetermined patten transformation threshold value is the function of the horsepower output of described combustion engine, described first electrical equipment or the second electrical equipment.In this way, in mode transition procedure, combustion engine, the first electrical equipment and the second electrical equipment can be run with the state of its optimum, thus optimize the driveability of motor vehicle driven by mixed power significantly, improve the conversion efficiency of fuel oil and electric energy.
According to an illustrative embodiment of the invention, described predetermined patten transformation threshold value is the function of the speed of described motor vehicle driven by mixed power.Such as, by predetermined patten transformation threshold value being set to the function of the speed of motor vehicle driven by mixed power, can optimize and catch the kinetic energy of described motor vehicle driven by mixed power by described first electrical equipment and be the operation of electrical power storage in described high-tension battery by caught kinetic transformation, thus optimize the driveability of motor vehicle driven by mixed power further, improve the conversion efficiency of fuel oil and electric energy.
According to an illustrative embodiment of the invention, method 100 also comprises: according to the charge condition of predetermined high-tension battery in described at least three kinds of drive patterns, calibrates described predetermined patten transformation threshold value.Alternatively, predetermined patten transformation threshold value can be calibrated according to the charge condition of predetermined high-tension battery corresponding in the first drive pattern, wherein the charge condition of predetermined high-tension battery can be correspond to the horsepower output of the first electrical equipment maximum time charge condition, thus make the charge condition corresponding to the first drive pattern have desired scope, such as, can according to correspond to the horsepower output of the first electrical equipment maximum time charge condition, as 90%, calibrate predetermined patten transformation threshold value.By calibrating predetermined patten transformation threshold value, the charge condition in each drive pattern can be made to fall in desired scope, motor vehicle driven by mixed power is run with desired drive pattern, optimizes the driveability of motor vehicle driven by mixed power, improve the conversion efficiency of fuel oil and electric energy.
According to an illustrative embodiment of the invention, according to the predetermined conversion times being converted to described another kind of drive pattern from described a kind of drive pattern, calibrate described predetermined patten transformation threshold value.Alternatively, if expect that motor vehicle driven by mixed power reduces the number of times of patten transformation in the process of moving as far as possible, the predetermined patten transformation threshold value of adjustable, increase the difference of two adjacent predetermined patten transformation threshold values, thus reduce wearing and tearing and the friction of mechanical inter-module, and reduce the noise of patten transformation, vibration and uneven compliance.
According to an illustrative embodiment of the invention, described a kind of drive pattern is converted to described another kind of drive pattern is be converted to by described ICE-powered second drive pattern from described first drive pattern.Alternatively, if expect that motor vehicle driven by mixed power reduces the number of times from the conversion between the first drive pattern by the first electrical equipment driving and the pattern by ICE-powered second drive pattern in the process of moving as far as possible, the predetermined patten transformation threshold value of adjustable, such as, be set as being converted to driver's power demand corresponding to the second drive pattern compared with lower than under same or approximate charge condition from the first drive pattern by the second drive pattern being converted to driver's power demand corresponding to the first drive pattern.Make to occur sluggish (Hysteresis) from the patten transformation of the second drive pattern to the first drive pattern, thus reduce noise because producing during internal combustion engine start, vibration and uneven compliance, and reduce mechanical inter-module and frequently combine, be separated the wearing and tearing and friction that cause.Alternatively, as shown in Figure 3, also can by predetermined patten transformation threshold value F
aB(x, y) sets a sluggishness (Hysteresis) switching threshold dotted line F '
aB(x, y), make the internal combustion engine start when being converted to the second drive pattern, and the first electrical equipment is not closed immediately, but still continuous firing predetermined time interval, thus reduce noise because producing during internal combustion engine start, vibration and uneven compliance, and reduce wearing and tearing and the friction of mechanical inter-module.Similarly, also show in Fig. 4 C when being converted to the second drive pattern from the first drive pattern, the first electrical equipment is not closed immediately, but still continuous firing predetermined time interval, as straight line L '
5shown in, thus reduce noise because producing during internal combustion engine start, vibration and uneven compliance, and reduce wearing and tearing and the friction of mechanical inter-module.
According to an illustrative embodiment of the invention, wherein when described charge condition increases, predetermined patten transformation threshold value corresponding when being converted to described second drive pattern from described first drive pattern increases.As shown in Figure 3, when described charge condition SOC increases, predetermined patten transformation threshold value F corresponding when being converted to described second drive pattern from described first drive pattern
aB(x, y) increases.That is, when charge condition is less, patten transformation threshold value F
aB(x, y) is less, when detected driver's power demand and detected charge condition only need to reach less patten transformation threshold value F
aBtime (x, y), the second drive pattern can be converted to from the first drive pattern; When charge condition is higher, patten transformation threshold value F
aB(x, y) is higher, and detected driver's power demand and detected charge condition need reach higher patten transformation threshold value F
aBtime (x, y), just can be converted to the second drive pattern from the first drive pattern.Like this, when charge condition is lower, motor vehicle driven by mixed power can primarily of internal combustion engine drive, and when charge condition is increased to higher numerical value, motor vehicle driven by mixed power can drive primarily of the first electrical equipment, thus optimizes further the driveability of motor vehicle driven by mixed power and improve the conversion efficiency of fuel oil and electric energy.
According to an illustrative embodiment of the invention, described predetermined patten transformation threshold value comprises calibration function or tables look-up, and when described charge condition changes, described calibration function or table look-up changes continuously.Alternatively, as shown in Figure 3, predetermined patten transformation threshold value comprises calibration function, such as F
aB(x, y) and F
bC(x, y), the described calibration function F when described charge condition changes
aB(x, y) and F
bC(x, y) changes continuously.By making calibration function or tabling look-up along with charge condition changes continuously, and decrease the noise of patten transformation, vibration and uneven compliance, user is not easily discovered, obtains higher traveling comfort and better Consumer's Experience.
According to an illustrative embodiment of the invention, described predetermined patten transformation threshold value comprises calibration function or tables look-up, and when the speed of described motor vehicle driven by mixed power changes, described calibration function or table look-up changes continuously.By making calibration function or tabling look-up along with the speed of motor vehicle driven by mixed power changes continuously, and decrease the noise of patten transformation, vibration and uneven compliance, user is not easily discovered, obtains higher traveling comfort and better Consumer's Experience.
In a word, the driving method 100 for motor vehicle driven by mixed power that embodiments of the present invention provide, can provide required driver's power demand, can be converted to another kind of drive pattern smoothly as required from a kind of drive pattern simultaneously; The selection of drive pattern can be made not only based on the charge condition of high-tension battery, also fully with reference to the operating efficiency of combustion engine, thus the driveability of motor vehicle driven by mixed power can be optimized significantly, improve the conversion efficiency of fuel oil and electric energy; Can make patten transformation lentamente, can repeatedly carry out, avoid driver to be subject to the interference of patten transformation, thus realize better traveling comfort and better Consumer's Experience; The number of times of patten transformation can be made minimum, contribute to the wearing and tearing and the friction that reduce mechanical inter-module, and reduce the noise of patten transformation, vibration and uneven compliance.
In this manual, a large amount of details is described.But, should be appreciated that embodiments of the present invention can be implemented when not having these details.In some embodiments, be not shown specifically known method, structure and technology, not make reader obscure the understanding of the principle to this specification sheets.
It will be understood by those skilled in the art that and can the module in the device in each embodiment adaptively be changed, and they are arranged in one or more devices different from this embodiment.Except the situation that feature or process are mutually repelled, any combination can be adopted, to method any disclosed in this specification sheets in steps or all modules of any device combine.Unless expressly stated otherwise, each feature disclosed in this specification sheets can by providing identical, equivalent or similar object alternative features replaces.
The present invention will be described instead of limit the invention to it should be noted that above-mentioned embodiment, and those skilled in the art are not when departing from the scope of claims, can design various alternate embodiments.In detail in the claims, the sequence of feature does not also mean that any particular order of feature, and especially, in claim to a method each step order and do not mean that these steps must perform according to this order.On the contrary, these steps can perform with any order suitably.In detail in the claims, any reference marker being positioned at bracket should be understood as limitations on claims.Term " comprises " or " comprising " is not got rid of existence and do not arrange module in the claims or step.The term "a" or "an" be positioned at before module or step is not got rid of and be there is multiple such module or step.The use of term " first ", " second " and " the 3rd " etc. does not represent any order, can be title by these terminological interpretations.
Claims (12)
1., for a driving method for motor vehicle driven by mixed power, described motor vehicle driven by mixed power has combustion engine, the first electrical equipment run, the second electrical equipment directly joining described combustion engine to and high-tension battery independent of described combustion engine; Described motor vehicle driven by mixed power is driven with at least three kinds of drive patterns, and described at least three kinds of drive patterns comprise: the first drive pattern driven by described first electrical equipment, by described ICE-powered second drive pattern and by described first electrical equipment, described second electrical equipment and described ICE-powered the 3rd drive pattern; Described method comprises:
Detect the charge condition of driver's power demand and described high-tension battery;
By detected driver's power demand with detected charge condition compared with predetermined patten transformation threshold value, to obtain comparative result, wherein said predetermined patten transformation threshold value is the function of driver's power demand and charge condition; And
Drive pattern is selected, to drive described motor vehicle driven by mixed power according to described comparative result.
2. the method for claim 1, wherein said predetermined patten transformation threshold value is multiple patten transformation threshold values, and when detected driver's power demand and detected charge condition reach one in described multiple patten transformation threshold value, the drive pattern of described motor vehicle driven by mixed power is converted to another kind of drive pattern from a kind of drive pattern described at least three kinds of drive patterns.
3. the method for claim 1, wherein said first drive pattern comprise in following pattern one or more:
Energy recuperation mode, wherein by described first electrical equipment catch described motor vehicle driven by mixed power kinetic energy and by caught kinetic transformation be electrical power storage in described high-tension battery, think that described high-tension battery charges;
Sliding mode, the propulsive effort wherein provided by described first electrical equipment is zero; With
Electric drive mode, wherein only drives described motor vehicle driven by mixed power by described first electrical equipment.
4. the method for claim 1, wherein said second drive pattern comprise in following pattern one or more:
Charge mode, wherein said combustion engine for described second electrical equipment energy is provided and described second electrical equipment be described high-tension battery charging;
Internal combustion engine drive pattern, wherein only by motor vehicle driven by mixed power described in described internal combustion engine drive; With
Propelling pattern, wherein drives described motor vehicle driven by mixed power jointly by described combustion engine and described second electrical equipment.
5. the method for claim 1, wherein said predetermined patten transformation threshold value is the function of the horsepower output of described combustion engine, described first electrical equipment or the second electrical equipment.
6. the method for claim 1, wherein said predetermined patten transformation threshold value is the function of the speed of described motor vehicle driven by mixed power.
7. the method for claim 1, also comprises: according to the charge level of predetermined high-tension battery in described at least three kinds of drive patterns, calibrates described predetermined patten transformation threshold value.
8. method as claimed in claim 2, also comprises: according to the predetermined conversion times being converted to described another kind of drive pattern from described a kind of drive pattern, calibrates described predetermined patten transformation threshold value.
9. method as claimed in claim 8, it is be converted to by described ICE-powered second drive pattern from described first drive pattern that wherein said a kind of drive pattern is converted to described another kind of drive pattern.
10. the method for claim 1, wherein when described charge condition increases, predetermined patten transformation threshold value corresponding when being converted to described second drive pattern from described first drive pattern increases.
11. the method for claim 1, wherein said predetermined patten transformation threshold value comprises calibration function or tables look-up, and when described charge condition changes, described calibration function or table look-up changes continuously.
12. methods as claimed in claim 6, wherein said predetermined patten transformation threshold value comprises calibration function or tables look-up, and when the speed of described motor vehicle driven by mixed power changes, described calibration function or table look-up changes continuously.
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Application publication date: 20150506 |