CN110901369A - Three-motor type hybrid power system - Google Patents
Three-motor type hybrid power system Download PDFInfo
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- CN110901369A CN110901369A CN201911166261.XA CN201911166261A CN110901369A CN 110901369 A CN110901369 A CN 110901369A CN 201911166261 A CN201911166261 A CN 201911166261A CN 110901369 A CN110901369 A CN 110901369A
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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
- B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
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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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- 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
- B60K6/36—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 transmission gearings
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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
- B60K6/42—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 the architecture of the hybrid electric vehicle
- B60K6/44—Series-parallel type
- B60K6/442—Series-parallel switching type
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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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- 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 three-motor type hybrid power system which is used for outputting torque to an output shaft and comprises an engine, a first motor, a second motor, a generator and a transmission assembly, wherein the engine is connected with the first motor; the transmission assembly comprises a first shaft, a first joint unit, a second shaft and a second joint unit; the first shaft and the output shaft have a transmission relation, and the first motor is in driving connection with the first shaft; the first joint unit is used for establishing or disconnecting a driving relation between the second motor and the first shaft; the engine and the generator are both in driving connection with the second shaft; the second engagement unit is used for establishing or disconnecting the transmission relation between the first shaft and the second shaft. The power system has rich controllable choices of power modes, and can start the proper power mode according to the power requirement during driving so as to achieve better energy efficiency; in addition, due to the adoption of three motor/generators, the designed power of each motor/generator can be degraded under the condition of ensuring the maximum output power, so that the whole structure of the system is compact.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a three-motor type hybrid power system.
Background
With the development of science and technology and the improvement of the transportation level, pollution reduction and emission reduction become necessary and social development consensus. The electric vehicle serving as an urban transportation means is increasingly becoming a mainstream means of transportation, and the pure electric vehicle serving as an urban new energy transportation mainstream means of transportation accounts for 80%, so that pollution emission in cities can be reduced, urban air quality is maintained, and a larger health index is brought to people. However, as a pure electric vehicle, the endurance mileage, the economic efficiency of high-speed driving and the convenience of charging become the first adverse factors which disturb the traveling of most users. Therefore, various hybrid power drives are available, and the mainstream configuration of the conventional hybrid power drive system includes an engine, a generator and a driving motor to realize three power modes, namely single-motor drive, series-type drive and hybrid power drive, wherein the power mode is single, the power level is low, and the maximum energy efficiency cannot be exerted.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a three-motor type hybrid power system, which aims to solve the problems of single power mode and low energy efficiency of the conventional hybrid power system.
The technical scheme is as follows: in order to achieve the above object, the three-motor hybrid system of the present invention is used for outputting torque to an output shaft, and includes an engine, a first motor, a second motor, a generator, a battery, and a transmission assembly; the first motor, the second motor and the generator are all connected with the battery; the transmission assembly includes:
the first shaft is in transmission relation with the output shaft, and the first motor is in driving connection with the first shaft;
a first engagement unit for establishing or breaking a driving relationship between the second motor and the first shaft;
the engine and the generator are in driving connection with the second shaft; and
a second engagement unit for establishing or breaking a driving relationship of the first shaft and a second shaft.
Further, still include the headstock, first motor, second motor and generator are installed on the same side of headstock, and the three is the triangle overall arrangement and arranges.
Further, the generator may output torque as a motor.
Further, the first electric machine and/or the second electric machine may be operable as a generator to generate electrical energy.
Further, the first shaft is provided with a first gear, and the second shaft is provided with a second gear meshed with the first gear; one of the first gear and the second gear is fixedly connected with the shaft on which the first gear is arranged, and the second engaging unit is used for establishing or disconnecting the transmission connection relationship between the other gear and the shaft on which the second gear is arranged.
Further, a third gear is provided on the first shaft;
the first motor is in driving connection with a fourth gear, and the fourth gear is coaxially arranged with the first motor and is meshed with the third gear;
the second motor and a fifth gear are coaxially arranged, the first joint unit is used for establishing or disconnecting a driving connection relation between the first joint unit and the third joint unit, and the fifth gear is meshed with the third gear.
Further, the generator is in driving connection with the first shaft through a first gear set.
Further, the second shaft is in driving connection with the output shaft through a second gear set.
Has the advantages that: the three-motor hybrid power system comprises four power/power generation elements and two joint elements, and can be switched among a pure electric mode, a parallel mode and a series mode by controlling the joint states of the two joint elements, each mode also has subdivision power modes with different sizes, so that the whole power system has rich controllable choices of power modes, and a proper power mode can be started according to power requirements during driving so as to achieve better energy efficiency; in addition, due to the adoption of three motor/generators, the designed power of each motor/generator can be degraded under the condition of ensuring the maximum output power, so that the whole structure of the power system is compact.
Drawings
Fig. 1 is a system configuration diagram of a three-motor hybrid system;
fig. 2 is a layout diagram of the positions of the first motor, the second motor and the generator.
In the figure: 1-an engine; 2-a first electric machine; 3-a second motor; 4-a generator; 5-a first shaft; 6-a first engaging unit; 7-a second axis; 8-a second engagement unit; 9-a power box; 10-a first gear; 11-a second gear; 12-a third gear; 13-a fourth gear; 14-a fifth gear; 15-a battery; 16-an output shaft; 17-sixth gear; 18-seventh gear; 19-eighth gear; 20-ninth gear; 21-a differential; 22-control system.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "provided" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
A three-motor hybrid powertrain system (hereinafter referred to as "powertrain system") shown in fig. 1 is used to output torque to an output shaft 16 for driving wheels to rotate for driving a vehicle.
The power system comprises an engine 1, a first motor 2, a second motor 3, a generator 4, a transmission assembly and a battery 15; the first motor 2, the second motor 3, and the generator 4 are all connected to the battery 15, and in this embodiment, the generator 4 is a dual-purpose generator that can be used as a motor, and can be passively operated to generate electric energy and store the electric energy in the battery 15, and can also consume the electric energy of the battery 15 to actively operate and output kinetic energy; and direct power supply lines are arranged between the generator 4 and the first motor 2 and between the generator 4 and the second motor 3, and under necessary conditions (for example, when the electric quantity of the battery 15 is insufficient), the generator 4 can directly supply power to the first motor 2 and/or the second motor 3 through the direct power supply lines without storing the power to the battery 15, and then the power is supplied to the first motor 2 and/or the second motor 3 by the battery 15, so that the loss of electric energy in the transmission process can be reduced. Further, the first electric machine 2 and/or the second electric machine 3 may be a dual-type electric machine that can be used as a generator, and both can recover kinetic energy of the vehicle and convert it into electric energy to be stored in the battery 15 in the case where the vehicle decelerates or the like.
The whole transmission assembly is of a transmission box body structure and comprises a power box 9, wherein a gear set, a transmission shaft and other parts are arranged in the power box 9, four mounting positions for mounting a power source are arranged on the outer wall of the power box 9, and the engine 1, the first motor 2, the second motor 3 and the generator 4 are respectively mounted on one mounting position and combined with a plurality of parts in the power box 9 to generate power interaction with the power assembly so as to execute a task of driving a vehicle to run and/or a power generation task. The battery 15 is arranged outside the power box 9.
As shown in fig. 1, the power assembly includes a first shaft 5, a first engaging unit 6, a second shaft 7, and a second engaging unit 8, and it should be noted that the state shown in fig. 1 is only a schematic diagram for showing the matching relationship of the components, and it is not an actual layout diagram of the power system, in actual use, the positions of the shafts in fig. 1 may be staggered back and forth in a direction perpendicular to the paper surface, and the line length of each component in fig. 1 does not represent the size or the dimensional ratio of the component. Next, the layout structure of each component in the power module will be specifically described.
The first shaft 5 is parallel to the output shaft 16, a transmission relation exists between the first shaft 5 and the output shaft 16, and the first motor 2 is in driving connection with the first shaft 5; the first engaging unit 6 is used to establish or break a driving relationship between the second motor 3 and the first shaft 5, so that whether the second motor 3 is driven or not can be controlled by controlling the engaging state of the first engaging unit 6.
Specifically, the first motor 2 and the second motor 3 are both connected to the first shaft 5 by the following structure: the first shaft 5 is provided with a third gear 12, the first motor 2 is in driving connection with a fourth gear 13, and the fourth gear 13 is coaxially arranged with the first motor 2 and meshed with the third gear 12; the second motor 3 is arranged coaxially with a fifth gear 14, the first engaging unit 6 is used for establishing or disconnecting a driving connection relationship between the two, and the fifth gear 14 is meshed with the third gear 12. In this way, when only the first motor 2 is required to participate in driving, the first engaging unit 6 is controlled to disconnect the driving connection relationship of the second motor 3 and the fifth gear 14; when the second motor 3 is required to participate in driving, the first joint unit 6 is controlled to establish a driving connection relationship between the second motor 3 and the fifth gear 14, and the fourth gear 13 and the fifth gear 14 are both meshed with the third gear 12, so that power summarization of the fourth gear and the fifth gear is facilitated, and the number of parts is reduced. The first engagement unit 6 may be in the form of a clutch, a synchronizer, or the like.
The second shaft 7 is arranged in parallel with the first shaft 5, and the engine 1 and the generator 4 are in driving connection with the second shaft 7; the second engagement unit 8 is used to establish or break the transmission relationship of the first shaft 5 and the second shaft 7. By controlling the engaged or disengaged state of the second engagement unit 8, it is possible to determine whether the power of the engine 1 and the generator 4 used as a motor is involved in driving the output shaft 16. Specifically, when the second engagement unit 8 establishes the second shaft 7 in a transmission relationship with the first shaft 5, the power of the engine 1 can participate in the driving of the output shaft 16, at which time the generator 4 functions as a motor that consumes the power of the battery 15 and outputs kinetic energy; when the second engagement unit 8 disconnects the transmission relationship between the second shaft 7 and the first shaft 5, the engine 1 and the generator 4 cannot participate in driving the output shaft 16, and thus the two forms can be presented: in one state, the engine 1 and the generator 4 are both in an idle state; in another state, the engine 1 may be started to drive the generator 4 to generate electric power to charge the battery 15.
The connection relationship among the engine 1, the generator 4, the first shaft 5, and the second shaft 7 is as follows: the first shaft 5 is provided with a first gear 10, and the second shaft 7 is provided with a second gear 11 engaged with the first gear 10; one of the first gear 10 and the second gear 11 is fixedly connected with the shaft on which the first gear is arranged, and the second engaging unit 8 is used for establishing or disconnecting the transmission connection relationship between the other one of the first gear and the second gear and the shaft on which the second gear is arranged. In the present embodiment, the first gear 10 is fixed on the first shaft 5, and the second engaging unit 8, which is not a clutch, is mounted on the second shaft 7 for establishing or breaking the transmission connection relationship of the second shaft 7 and the second gear 11. In other embodiments, the second shaft 7 and the second gear 11 may be fixed relatively, and the second engaging unit 8 is mounted on the first shaft 5 for establishing or breaking the transmission connection relationship between the first shaft 5 and the first gear 10. The second engaging unit 8 may be a synchronizer, a plurality of pairs of gear sets may be provided between the first shaft 5 and the second shaft 7, the gear ratios of the gear sets in each pair are different, and the synchronizer may apply different power transmission actions to the gear sets to provide different gear ratios to both the first shaft 5 and the second shaft 7, thereby completing a gear shift operation.
The generator 4 is in driving connection with the first shaft 5 through a first gear set comprising a sixth gear 17 arranged coaxially with the motor shaft of the generator 4 and a seventh gear 18 fixed on the first shaft 5, the sixth gear 17 meshing with the seventh gear 18 and giving the generator 4 and the first shaft 5 both a first transmission ratio.
The second shaft 7 is in transmission connection with the output shaft 16 through a second gear set, the second gear set comprises an eighth gear 19 fixedly mounted on the second shaft 7 and a ninth gear 20 coaxially arranged with the output shaft 16, and the eighth gear 19 is meshed with the ninth gear 20 and gives the second transmission ratio to both the second shaft 7 and the output shaft 16. Furthermore, the powertrain may further comprise a differential 21, which differential 21 is provided between the ninth gear 20 and the output shaft 16 to differentially distribute torque to said output shaft 16.
Furthermore, the power system comprises a control system 22, said control system 22 connecting the above-mentioned engine 1, first electric machine 2, second electric machine 3, generator 4, first coupling unit 6 and second coupling unit 8.
Based on the above structural composition of the power system, the control system 22 can make the power system assume the following three power modes by controlling the operating states of the engine 1, the first electric machine 2, the second electric machine 3, and the generator 4, and controlling the engagement states of the first engagement unit 6 and the second engagement unit 8:
(1) pure electric mode
In this mode, the second engaging unit 8 is in the off state, and at this time, the single-motor pure electric drive mode or the dual-motor pure electric drive mode can be selected. In the single-motor pure electric drive mode, the first engaging unit 6 is in an off state; in the dual-motor pure electric drive mode, the first engagement unit 6 is in an engaged state, and the power output by the first motor 2 and the power output by the second motor 3 are collected on the first shaft 5 and then transmitted to the output shaft 16 through the second gear set.
(2) Parallel mode
In this mode, the second engagement unit 8 is in an engaged state in which the engine 1 is operated, the generator 4 is used as a motor to consume electric power of the battery 15 and output kinetic energy, and the powers of both the engine 1 and the generator 4 are combined on the second shaft 7 and transmitted to the first shaft 5 through the first gear set. At this time, the first engaging unit 6 may be in a disconnected state, and only the first motor 2 participates in driving, so as to form a three-power-source parallel driving mode; or the first engaging unit 6 may be in an engaged state, and at this time, the first motor 2 and the second motor 3 both participate in driving, so that a four-power-source parallel driving mode is formed.
(3) Series mode
In this mode, the second engaging unit 8 is in the disconnected state, and the engine 1 is operated to drive the generator 4 to generate electric energy to charge the battery 15, at this time, the first engaging unit 6 may be in the disconnected state, and the first electric machine 2 alone outputs power, or the first engaging unit 6 may also be in the engaged state, and the first electric machine 2 and the second electric machine 3 output power together.
By controlling the running state of each power source and the joint state of each joint unit, different power modes can be flexibly selected according to power requirements and energy efficiency, the number of power modes is large, the number of corresponding power grades is large, selectivity is high, and improvement of the energy efficiency of a vehicle is facilitated.
In addition, because the power system includes a plurality of motors/generators, on the premise of ensuring the total design power of the power system, the design power of each motor and generator can be degraded, each motor/generator can be selected as a model with a smaller power specification, and the smaller power specification means a lower price and a smaller volume, in order to make the structure of the power system compact, the first motor 2, the second motor 3 and the generator 4 are installed on the same side of the power box 9, and the three are arranged in a triangular layout, which can be but not limited to an equilateral triangle layout (as shown in fig. 2) or an isosceles triangle layout; therefore, the three devices are arranged compactly, and the occupied space is reduced. The engine 1 is mounted on the other side of the power box 9, and the side where the engine 1 is located is opposite to the side where the motor/generator is mounted, so that the left and right weights of the power system can be balanced.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (8)
1. A three-motor hybrid power system is used for outputting torque to an output shaft and is characterized by comprising an engine, a first motor, a second motor, a generator, a battery and a transmission assembly; the first motor, the second motor and the generator are all connected with the battery; the transmission assembly includes:
the first shaft is in transmission relation with the output shaft, and the first motor is in driving connection with the first shaft;
a first engagement unit for establishing or breaking a driving relationship between the second motor and the first shaft;
the engine and the generator are in driving connection with the second shaft; and
a second engagement unit for establishing or breaking a driving relationship of the first shaft and a second shaft.
2. The three-motor hybrid system according to claim 1, further comprising a power box, wherein the first motor, the second motor and the generator are mounted on the same side of the power box, and the three are arranged in a triangular layout.
3. A three-motor hybrid powertrain system as claimed in claim 1, wherein the generator is operable as a motor to output torque.
4. A three-motor hybrid powertrain system as claimed in claim 1, wherein the first and/or second electric machine is operable as a generator to generate electrical energy.
5. The three-motor hybrid system according to claim 1, wherein the first shaft is provided with a first gear, and the second shaft is provided with a second gear that meshes with the first gear; one of the first gear and the second gear is fixedly connected with the shaft on which the first gear is arranged, and the second engaging unit is used for establishing or disconnecting the transmission connection relationship between the other gear and the shaft on which the second gear is arranged.
6. The three-motor hybrid system according to claim 1, wherein a third gear is provided on the first shaft;
the first motor is in driving connection with a fourth gear, and the fourth gear is coaxially arranged with the first motor and is meshed with the third gear;
the second motor and a fifth gear are coaxially arranged, the first joint unit is used for establishing or disconnecting a driving connection relation between the first joint unit and the third joint unit, and the fifth gear is meshed with the third gear.
7. The three-motor hybrid system of claim 1, wherein the generator is in driving connection with the first shaft through a first gear set.
8. A three-motor hybrid powertrain system as in claim 1, wherein the second shaft is in driving connection with the output shaft through a second gear set.
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Address after: No.66 Lijiang Road, Yancheng Economic and Technological Development Zone, Jiangsu Province 224000 Applicant after: Jiangsu New Energy Vehicle Research Institute Co.,Ltd. Address before: Room 1602, L / F, Yanwu Oriental Poly Plaza, 589 Tongbei Road, Yangpu District, Shanghai 200082 Applicant before: Jiangsu New Energy Vehicle Research Institute Co.,Ltd. |
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