CN112824123B - Dual-motor electromechanical coupling system and vehicle - Google Patents

Dual-motor electromechanical coupling system and vehicle Download PDF

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Publication number
CN112824123B
CN112824123B CN201911145613.3A CN201911145613A CN112824123B CN 112824123 B CN112824123 B CN 112824123B CN 201911145613 A CN201911145613 A CN 201911145613A CN 112824123 B CN112824123 B CN 112824123B
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China
Prior art keywords
gear
clutch
engine
generator
gear pair
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CN201911145613.3A
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CN112824123A (en
Inventor
朱永明
周文太
苏建云
魏丹
祁宏钟
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Guangzhou Automobile Group Co Ltd
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Guangzhou Automobile Group Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/36—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
    • 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
    • B60K6/38—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 driveline clutches
    • 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
    • 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
    • B60K6/445—Differential gearing distribution type
    • 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
    • B60K6/54—Transmission for changing ratio
    • B60K6/543—Transmission for changing ratio the transmission being a continuously variable transmission
    • 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
    • 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
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Abstract

The invention relates to the technical field of new energy electromechanical coupling, and discloses a double-motor electromechanical coupling system and a vehicle, wherein the double-motor electromechanical coupling system comprises an engine, a generator, a driving motor, a first clutch and a second clutch; an output shaft of the engine is in transmission connection with the generator, and is connected with the driving motor through a first connecting shaft; the first connecting shaft is provided with a first gear pair and a second gear pair, the first clutch is arranged between the first gear pair and the second gear pair, the first gear pair is in transmission connection with the differential mechanism, and the driving motor is in transmission connection with the differential mechanism through the second gear pair; the second clutch is arranged in the first gear pair; the second clutch is a reversible one-way clutch. The power requirements of the system on two motors can be effectively reduced, and the engine and the generator can work in a relatively efficient interval, so that the transmission conversion efficiency of the whole system is improved.

Description

Dual-motor electromechanical coupling system and vehicle
Technical Field
The invention relates to the technical field of new energy electromechanical coupling, in particular to a double-motor electromechanical coupling system and a vehicle.
Background
In order to achieve the purpose of energy conservation and emission reduction of the automobile, from the perspective of an automobile power source, the main technical scheme comprises three aspects: firstly, the technology for exploring the clean fuel capable of replacing the internal combustion engine mainly comprises the technology of alcohol fuel internal combustion engines, the technology of hydrogen fuel internal combustion engines, the technology of dimethyl ether internal combustion engines and the like; secondly, developing a novel power source, mainly relating to a pure electric vehicle taking a lithium ion power battery or a fuel battery as the only power source; thirdly, developing hybrid electric vehicle technology, and at present mainly adopting hybrid electric vehicle technology with an internal combustion engine and an electric motor as two power sources. Hybrid vehicle technologies can be classified into mild, moderate, severe and plug-in hybrid technologies according to the power ratio relationship between the internal combustion engine and the electric motor. Compared with the pure electric vehicle technology, the hybrid electric vehicle can fully utilize the infrastructure of the existing gas station and the like, so that the endurance mileage of the vehicle is not affected, and the energy-saving effect is obvious, therefore, the hybrid electric vehicle technology is the vehicle type with the most active market expression at present.
The electromechanical coupling system is also called a special hybrid power speed change system, is a key component in a hybrid power automobile, and is a core component for realizing power transmission, conversion and output of double power sources. Depending on the form of construction, there are power splitting structures, such as Toyota THS systems; has a series-parallel structure, such as a Honda IMMD system; has a parallel structure, such as a public P2 system; in addition, various electromechanical coupling transmission schemes are developed successively by all host factories and research and development units, and various structural forms have advantages and disadvantages. The key point of the electromechanical coupling system is to provide a possibility of realizing the efficient operation of the engine and the motor under all working conditions, and the transmission mode is the basis for realizing the efficient operation of the system. Too complex system will lead to complex system control logic and reduced system reliability; the simpler system is difficult to ensure the efficient operation of the system under the full working condition, and the motor system needs to be increased, so that the system cost is increased.
The motor input shaft of the Honda IMMD system is connected with the generator shaft through a pair of fixed gears, the drive motor shaft is connected with the main reduction output shaft through two-stage reduction transmission, and meanwhile, the motor shaft is also connected with the main reduction input shaft through a multi-plate wet clutch, so that pure electric drive, serial drive and single-gear parallel drive of the vehicle can be realized, and the structure is relatively simple. However, the honda IMMD system is mainly driven by a driving motor, and when the electric quantity of a battery is insufficient, the energy of the driving motor is mainly generated by a generator driven by an engine, and the driving mode is easy to directly cause that the requirements of the driving motor and the generator are large, namely, two large motors with larger power and torque are needed to realize the driving of a vehicle, and meanwhile, the engine and the generator are required to have very high working efficiency so as to compensate the energy conversion efficiency loss of series driving. The engine input shaft of the upper automobile EDU system is directly designed coaxially with the generator shaft, the driving motor is connected with the main reduction input shaft through two-stage reduction transmission, two pairs of transmission gears and two clutches are designed on the engine input shaft and the main reduction input shaft, and the switching of parallel two-gear transmission can be realized by switching different transmission gears. The EDU system reduces the power requirement of the double motors through a two-gear parallel transmission mode, but the overall structural design is complex, the engine is directly connected with the generator, the high-efficiency working characteristic of the high-speed permanent magnet synchronous generator is difficult to develop, the on-vehicle EDU system adopts a synchronizer to shift gears, power interruption occurs in the shifting process, and power shifting cannot be realized.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a double-motor electromechanical coupling system and a vehicle, which can effectively reduce the power requirements of the system on two motors, ensure that an engine and a generator can work in a relatively efficient interval, and improve the transmission and conversion efficiency of the whole system.
In order to achieve the above object, the present invention provides a dual-motor electromechanical coupling system including an engine, a generator, a driving motor, a first clutch, and a second clutch;
an output shaft of the engine is in transmission connection with the generator, and is connected with the driving motor through a first connecting shaft;
the first connecting shaft is provided with a first gear pair and a second gear pair, the first clutch is arranged between the first gear pair and the second gear pair, the first gear pair is in transmission connection with the differential mechanism, and the driving motor is in transmission connection with the differential mechanism through the second gear pair;
The second clutch is arranged in the first gear pair;
The second clutch is a reversible one-way clutch.
Optionally, the first clutch is a multi-plate clutch.
Optionally, the first gear pair includes a first driving gear and a first driven gear that are meshed with each other, the first driving gear is fixedly connected to the first connecting shaft, and the second clutch is disposed in the first driven gear;
The second gear pair comprises a second driving gear and a second driven gear which are meshed with each other, and the second driving gear is fixedly connected to the first connecting shaft;
the second driven gear and the first driven gear are respectively connected with the differential mechanism in a transmission way.
Optionally, the dual-motor electromechanical coupling system further comprises a third gear pair, and the first driven gear and the second driven gear are connected through a second connecting shaft;
the third gear pair comprises a third driving gear and a third driven gear which are meshed with each other, the third driving gear is arranged on the second connecting shaft and is positioned between the first driven gear and the second driven gear, and the third driven gear is connected with the differential mechanism.
Optionally, the dual-motor electromechanical coupling system further comprises a speed increasing gear, the speed increasing gear is meshed with the first driving gear to form a fourth gear pair, and an output shaft of the engine is connected with the generator through the fourth gear pair.
Optionally, the dual-motor electromechanical coupling system further includes a torsional damper, one end of the torsional damper is connected with the output end of the engine, and the other end of the torsional damper is connected with the first driving gear.
Optionally, the dual-motor electromechanical coupling system comprises a pure electric driving mode, a serial driving mode, a parallel first-gear driving mode, a parallel second-gear driving mode, a parking power generation mode and a braking energy recovery mode;
In the motor driving mode, the engine and the generator do not work, the first clutch is separated, the second clutch is reversely overrun-separated, and the driving motor transmits power to the differential through the second gear pair;
In the series driving mode, the engine drives the generator to generate electricity and provides electric energy to the driving motor or the power battery, the first clutch is separated, the second clutch is positively overrun-separated, and the driving motor transmits power to the differential through the second gear pair;
In the parallel first-gear driving mode, the first clutch is combined, the second clutch is positively overrun and separated, the engine, the generator and the driving motor are in parallel mixed action connection, and power is transmitted to the differential through the second gear pair;
in the parallel second-gear driving mode, the first clutch is separated, the second clutch is reversely overrun-separated, the engine, the generator and the driving motor are in a parallel mixed-motion connection state, the power of the engine and the generator is transmitted to the differential through the first gear pair, and the power of the driving motor is transmitted to the differential through the second gear pair;
In the parking power generation mode, the driving motor does not work, the first clutch is separated, the second clutch is positively overrun-separated, and the engine drives the generator to generate power and supplies electric energy to the power battery;
In the braking energy recovery mode, the engine and the generator do not work, the first clutch is separated, the second clutch is reversely overrun-separated, the driving motor generates electricity, and vehicle braking energy is converted into electric energy to be stored in the power battery.
In order to solve the technical problem, the invention also provides a vehicle which comprises the double-motor electromechanical coupling system.
Compared with the prior art, the dual-motor electromechanical coupling system and the vehicle have the beneficial effects that:
The double-motor electromechanical coupling system of the embodiment of the invention is provided with a reversible one-way clutch and a first clutch, an engine, a generator, a driving motor, an associated gear pair and a first connecting shaft. The output shaft of the engine is in transmission connection with the generator shaft, so that the starting of the engine and the power generation function of the generator can be realized; the drive motor shaft is in transmission connection with the output of the differential through a second gear pair, so that the pure electric drive and the braking energy recovery function of the vehicle can be realized; an output shaft of the engine is connected with a drive motor shaft through a first connecting shaft and a first clutch, and meanwhile, the engine output shaft is also in transmission connection with a differential mechanism through a reversible one-way clutch, and the two-gear switching from the engine to the output of the automobile wheel end can be effectively realized by controlling the combination or separation of the first clutch and switching the combination direction of the reversible one-way clutch. Therefore, the transmission output capacity from the engine to the automobile wheel end is effectively increased, so that the engine can directly output power to the wheel end from the middle speed to the low speed, the similar need of IMMD is avoided, the engine drives the generator to generate electricity, and the obtained electric energy is supplied to the driving motor, so that the power requirements of the two motors are reduced. The driving motor is directly connected with the output of the automobile wheel end, the power output of the engine and the power output of the generator are switched and regulated through the reversible one-way clutch and the first clutch, the unpowered interruption of the gear shifting process is realized, and the engine and the power generator can directly select a proper transmission ratio according to the working characteristics of the engine and the power generator, so that the engine and the power generator can work in a relatively high-efficiency interval under the serial working condition, and the transmission conversion efficiency of the system is improved. Therefore, the switching of each driving mode is realized by adopting the reversible one-way clutch and the first clutch, the structural complexity and the control complexity of the system are reduced, the reliability of the system is improved, the requirements of a motor system can be reduced by adopting the two-gear driving of an engine, the cost of the whole electromechanical coupling system is reduced, and all parts can work in a relatively efficient section by the coordination and cooperation of three power sources, so that the conversion efficiency of system transmission is improved.
Drawings
FIG. 1 is a schematic diagram of a dual motor electromechanical coupling system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a dual-motor electromechanical coupling system according to an embodiment of the present invention in a parallel first gear drive mode;
FIG. 3 is a schematic diagram of a dual-motor electromechanical coupling system according to an embodiment of the present invention in a parallel second-gear drive mode;
Fig. 4 is a schematic structural diagram of a dual-motor electromechanical coupling system according to an embodiment of the present invention in a pure electric driving mode, a serial driving mode, or a parking power generation mode.
In the figure, 1, an engine; 2. a generator; 3. a driving motor; 4. a first clutch; 5. a second clutch; 6. a first connecting shaft; 7. a first gear pair; 8. a second gear pair; 9. a differential; 10. a third gear pair; 12. a speed increasing gear; 13. a torsional damper; 14. and a fourth gear pair.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
As shown in fig. 1, a dual-motor electromechanical coupling system according to a preferred embodiment of the present invention is characterized by comprising an engine 1, a generator 2, a driving motor 3, a first clutch 4 and a second clutch 5; an output shaft of the engine 1 is in transmission connection with the generator 2, and the output shaft of the engine 1 is connected with the driving motor 3 through a first connecting shaft 6; the first connecting shaft 6 is provided with a first gear pair 7 and a second gear pair 8, the first clutch 4 is arranged between the first gear pair 7 and the second gear pair 8, the first gear pair 7 is in transmission connection with the differential 9, and the driving motor 3 is in transmission connection with the differential 9 through the second gear pair 8; the second clutch 5 is arranged in the first gear pair 7; the second clutch 5 is a reversible one-way clutch.
Based on the structure, the two-motor electromechanical coupling system adopts the reversible one-way clutch and the first clutch 4 to realize the switching of two gears from the engine 1 to the wheel end so as to increase the transmission output capacity from the engine 1 to the wheel end, so that the engine 1 can directly output power to the wheel end from low speed, the phenomenon that IMMD (inertial measurement device) is similar and needs to drive the generator 2 to generate power through the engine 1 is avoided, and the obtained electric energy is provided for the driving motor 3, thereby reducing the power requirements on the two motors. The driving motor 3 is directly connected with the output of the wheel end, the power output of the engine 1 and the power output of the generator 2 are switched and regulated through the reversible one-way clutch and the first clutch 4, the unpowered interruption of the gear shifting process is realized, and the engine 1 and the generator 2 can be directly and initially selected with proper transmission ratios according to the working characteristics of the engine 1 and the generator 2 under the construction so that the engine 1 and the generator 2 can work in a relatively high-efficiency zone under the serial working condition, so that the transmission conversion efficiency of the system is improved. The engine 1 belongs to an external component and is one of power input sources, the reversible one-way clutch is a pipe fitting element for realizing the second gear transmission of the engine 1 so as to switch different transmission directions, the torque transmission path of the engine 1 for driving the first gear pair 7 is changed, and when the reversible one-way clutch is in forward overrunning separation, the rotation speed of an output shaft of the engine 1 is higher than that of an input shaft of the differential 9, and the reversible one-way clutch is automatically separated; when the reversing one-way clutch is reversely overrun-separated, the rotating speed of the input shaft of the differential mechanism 9 is higher than that of the output shaft of the engine 1, and the reversing one-way clutch is automatically separated. The engine 1 is in transmission connection with the generator 2, so that the engine 1 can drive the generator 2 to generate power or the generator 2 can output power outwards; the engine 1 is in transmission connection with the differential mechanism 9 through a first gear pair 7 on the first connecting shaft 6, and the power of the engine 1 is transmitted to the output half-shaft driving vehicle; a reversible one-way clutch provided in the first gear pair 7 is used to change the torque transmission path of the gear pair. The first clutch 4 arranged on the first connecting shaft 6 is connected with the driving motor 3, and the driving motor 3 is in transmission connection with the differential mechanism 9 through the second gear pair 8 so as to transmit the power of the driving motor 3 to the output half shaft to drive the vehicle to move.
Further, with the above structure, the system can realize a pure electric driving mode, a serial driving mode, a parallel first gear driving mode, a parallel second gear driving mode, a parking power generation mode and a braking energy recovery mode in a whole vehicle state through the cooperation of the engine 1, the generator 2, the driving motor 3, the differential 9, the reversible one-way clutch, the first clutch 4, the first gear pair 7 and the second gear pair 8. In the pure electric driving mode, the engine 1 stops working, the generator 2 works in a zero torque state, the first clutch 4 is in a separation state, the reversible one-way clutch is in a reverse overrunning separation state, at the moment, the driving motor 3 singly outputs power, and the power is output to the half-shaft driven automobile for pure electric running through the second gear pair 8 on the first connecting shaft 6 connected with the output shaft of the engine 1 and the differential mechanism 9. In the series driving mode, the engine 1 normally works according to the requirement, the generator 2 keeps working condition matched with the engine 1 to operate according to the requirement, the engine 1 and the generator 2 are mutually matched, the coordinated control is operated in a relatively efficient section, electric energy emitted by the generator 2 is supplied to the power battery or the driving motor 3 for storage, the first clutch 4 is in a separation state, the reversible one-way clutch is in a forward overrunning separation state, and power output by the driving motor 3 can be output to the half shaft through the second gear pair 8 and the differential mechanism 9 to drive the automobile to run. In the parallel first-gear driving mode, the engine 1, the generator 2 and the driving motor 3 are in a parallel mixed connection state, the first clutch 4 is in a separation state, the reversible one-way clutch is in a forward overrunning separation state, at the moment, three power sources perform power distribution according to a certain power distribution logic, and the power of the engine 1, the power of the generator 2 and the power of the driving motor 3 can be output to a half shaft through the second gear pair 8 and the differential mechanism 9 to drive the automobile to run. Under the parallel second-gear driving mode, the engine 1, the generator 2 and the driving motor 3 are in a parallel mixed connection state, the first clutch 4 is in a separation state, the reversible one-way clutch is in a reverse overrunning separation state, three power sources are used for carrying out power distribution according to certain power distribution logic, finally, the power of the engine 1 and the generator 2 can be output to a half shaft through the first gear pair 7 and the differential mechanism 9, the power of the driving motor 3 can be output to the half shaft through the second gear pair 8 and the differential mechanism 9, and finally, the power of the three power sources can be correspondingly coupled and then drive the automobile to run. In the parking power generation mode, the engine 1 works as required, the generator 2 keeps working conditions matched with the engine 1 to operate as required, the engine 1 and the generator 2 perform coordinated control, the engine and the generator 2 work in a relatively efficient section, the first clutch 4 is in a separation state, the reversible one-way clutch is in a forward overrunning separation state, and at the moment, all electric energy generated by the generator 2 is provided for a power battery to charge. In the braking energy recovery mode, the driving motor 3 works in a power generation state, the engine 1 and the generator 2 do not work, the first clutch 4 is in a separation state, the reversible one-way clutch is in a reverse overrunning separation state, and the power generation of the driving motor 3 can convert braking energy of a vehicle into electric energy to be stored in the power battery.
In this embodiment, the first clutch 4 is a multi-plate clutch, which may be dry or wet, and has the advantages of small friction plate abrasion, long service life, small radial size, large torque, and capability of playing roles of clutch, reversing, speed change, and the like, and is widely applied to a transmission system, and has a simple structure and a small overall size, but the type of the first clutch 4 is not limited by the embodiment, and a suitable type can be selected according to actual needs.
Optionally, the first gear pair 7 includes a first driving gear and a first driven gear that are meshed with each other, the first driving gear is fixedly connected to the first connecting shaft 6, the second clutch 5 is disposed in the first driven gear, and separation and normal operation of the first gear pair 7 are achieved through separation and combination of the second clutch 5, so that a torque transmission path of the first gear pair 7 is changed. The second gear pair 8 comprises a second driving gear and a second driven gear which are meshed with each other, the second driving gear is fixedly connected to the first connecting shaft 6, the second driven gear and the first driven gear are respectively in transmission connection with the differential mechanism 9, the first driven gear can be used for transmitting power of the engine 1 and the motor to the differential mechanism 9, the second driven gear can be used for transmitting power of the engine 1, the generator 2 and the driving motor 3 to the differential mechanism 9, and a specific transmission path is selected through cooperation of the first clutch 4 and the second clutch 5.
Optionally, the dual-motor electromechanical coupling system further includes a third gear pair 10, the first driven gear and the second driven gear are connected through a second connecting shaft, the third gear pair 10 includes a third driving gear and a third driven gear that are meshed with each other, the third driving gear is disposed on the second connecting shaft and is located between the first driven gear and the second driven gear, the third driven gear is connected with a differential 9, and when power of the engine 1, the generator 2 and the driving motor 3 is transmitted to the differential through the first gear pair 7 or the second gear pair 8, the transmission through the third gear pair 10 is further needed, so that the power of three power sources can be coupled on the third gear pair 10, so as to facilitate the normal running of the driving vehicle.
As a preferred solution, the dual-motor electromechanical coupling system further comprises a step-up gear 12, the step-up gear 12 and the first driving gear are meshed with each other to form a fourth gear pair 14, and the output shaft of the engine 1 is connected with the generator 2 through the fourth gear pair 14, and the preferred solution of the step-up gear 12 seat can be used for optimizing and matching the working characteristics of the engine 1 and the generator 2, so that both can work in a relatively better working condition, especially in a series driving mode. The novel engine driving device further comprises a torsional damper 13, one end of the torsional damper 13 is connected with the output end of the engine 1, the other end of the torsional damper 13 is connected with the first driving gear, the torsional damper 13 can be used as a damping device in a transmission system, torsional impact load under unstable working conditions can be relieved, the transmission smoothness is improved, and the working stability of the whole system is improved.
The working process of the invention is as follows: in the motor driving mode, the engine 1 and the generator 2 do not work, the first clutch 4 is separated, the second clutch 5 is reversely overrun-separated, and the driving motor 3 transmits power to the differential mechanism 9 through the second gear pair 8;
in a series driving mode, the engine 1 drives the generator 2 to generate electricity and provides electric energy to the driving motor 3 or the power battery, the first clutch 4 is separated, the second clutch 5 is in positive overrunning separation, and the driving motor 3 transmits power to the differential 9 through the second gear pair 8;
In a parallel first-gear driving mode, the first clutch 4 is combined, the second clutch 5 is in positive overrunning separation, the engine 1, the generator 2 and the driving motor 3 are in parallel mixed motion connection, and power is transmitted to the differential mechanism 9 through the second gear pair 8;
In a parallel second-gear driving mode, the first clutch 4 is separated, the second clutch 5 is reversely overrun-separated, the engine 1, the generator 2 and the driving motor 3 are in a parallel mixed motion connection state, the power of the engine 1 and the generator 2 is transmitted to the differential 9 through the first gear pair 7, and the power of the driving motor 3 is transmitted to the differential 9 through the second gear pair 8;
In the parking power generation mode, the driving motor 3 does not work, the first clutch 4 is separated, the second clutch 5 is positively overrun-separated, the engine 1 drives the generator 2 to generate power, and the power is supplied to the power battery;
In the braking energy recovery mode, the engine 1 and the generator 2 do not work, the first clutch 4 is separated, the second clutch 5 is reversely overrun-separated, the driving motor 3 generates electricity, and the vehicle braking energy is converted into electric energy to be stored in the power battery.
The invention can realize the two-gear parallel driving of the engine 1, and simultaneously realize the parallel two-gear driving through the reversible one-way clutch, thereby reducing the system structure and the control complexity, and the multi-plate clutch is used for realizing the one-gear parallel driving and can realize the clutch sliding control so as to realize special working conditions, such as low-speed starting or climbing working conditions under low electric quantity, and further increase the output power of the wheel end of the automobile; the proper transmission ratio is set between the engine 1 and the generator 2, so that under the working conditions of series connection and the like, the engine 1 and the generator 2 can work in a relatively high-efficiency zone, and the transfer conversion efficiency of the system is improved.
The embodiment of the invention also provides a vehicle which comprises the double-motor electromechanical coupling system.
In summary, the present embodiment provides a two-motor electromechanical coupling system having a reversible one-way clutch and a first clutch 4, an engine 1, a generator 2, a drive motor 3, and associated gear pairs and first connecting shafts 6. The output shaft of the engine 1 is in transmission connection with the shaft of the generator 2, so that the starting of the engine 1 and the power generation function of the generator 2 can be realized; the shaft of the driving motor 3 is in output transmission connection with the differential mechanism 9 through the second gear pair 8, so that the pure electric driving and braking energy recovery functions of the vehicle can be realized; the output shaft of the engine 1 is connected with the shaft of the driving motor 3 through the first clutch 4 by the first connecting shaft 6, meanwhile, the output shaft of the engine 1 is also in transmission connection with the differential mechanism 9 through the reversible one-way clutch, and the two-gear switching from the engine 1 to the automobile wheel end output can be effectively realized by controlling the combination or separation of the first clutch 4 and switching the combination direction of the reversible one-way clutch. Therefore, the transmission output capacity from the engine 1 to the automobile wheel end is effectively increased, so that the engine 1 can directly output power to the wheel end from low speed, the similar need of IMMD (inertial measurement device) is avoided, the generator 2 is driven by the engine 1 to generate power, and the obtained electric energy is supplied to the driving motor 3, so that the power requirements on the two motors are reduced. The driving motor 3 is directly connected with the output of the automobile wheel end, the power output of the engine 1 and the power output of the generator 2 are switched and regulated through the reversible one-way clutch and the first clutch 4, the unpowered interruption of the gear shifting process is realized, and the engine 1 and the generator 2 can directly select a proper transmission ratio according to the working characteristics of the engine 1 and the generator 2, so that under the serial working condition, the engine 1 and the generator 2 can work in a relatively efficient section, and the transmission conversion efficiency of the system is improved. Therefore, the switching of each driving mode is realized by adopting the reversible one-way clutch and the first clutch 4, the structural complexity and the control complexity of the system are reduced, the reliability of the system is improved, meanwhile, the requirements of a motor system can be reduced by adopting the two-gear driving of the engine 1, the cost of the whole electromechanical coupling system is reduced, and each component can work in a relatively efficient section by the coordination and cooperation of three power sources, so that the conversion efficiency of system transmission is improved.
It should be understood that the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the invention.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.

Claims (4)

1. The double-motor electromechanical coupling system is characterized by comprising an engine, a generator, a driving motor, a first clutch and a second clutch;
an output shaft of the engine is in transmission connection with the generator, and is connected with the driving motor through a first connecting shaft;
the first connecting shaft is provided with a first gear pair and a second gear pair, the first clutch is arranged between the first gear pair and the second gear pair, the first gear pair is in transmission connection with the differential mechanism, and the driving motor is in transmission connection with the differential mechanism through the second gear pair;
The second clutch is arranged in the first gear pair;
the second clutch is a reversible one-way clutch;
The first clutch is a multi-plate clutch;
The first gear pair comprises a first driving gear and a first driven gear which are meshed with each other, the first driving gear is fixedly connected to the first connecting shaft, and the second clutch is arranged in the first driven gear;
The second gear pair comprises a second driving gear and a second driven gear which are meshed with each other, and the second driving gear is fixedly connected to the first connecting shaft;
The second driven gear and the first driven gear are respectively connected with the differential in a transmission way;
the first driven gear is connected with the second driven gear through a second connecting shaft;
The third gear pair comprises a third driving gear and a third driven gear which are meshed with each other, the third driving gear is arranged on the second connecting shaft and is positioned between the first driven gear and the second driven gear, and the third driven gear is connected with the differential mechanism;
the engine is characterized by further comprising a speed increasing gear, wherein the speed increasing gear is meshed with the first driving gear to form a fourth gear pair, and an output shaft of the engine is connected with the generator through the fourth gear pair.
2. The dual motor electromechanical coupling system according to claim 1, further comprising a torsional damper having one end connected to an output of the engine and another end connected to the first drive gear.
3. The two-motor electromechanical coupling system according to claim 1, characterized in that the two-motor electromechanical coupling system includes a pure electric drive mode, a series drive mode, a parallel first gear drive mode, a parallel second gear drive mode, a parking power generation mode, and a braking energy recovery mode;
in the pure electric driving mode, the engine and the generator do not work, the first clutch is separated, the second clutch is reversely overrun-separated, and the driving motor transmits power to the differential through the second gear pair;
In the series driving mode, the engine drives the generator to generate electricity and provides electric energy to the driving motor or the power battery, the first clutch is separated, the second clutch is positively overrun-separated, and the driving motor transmits power to the differential through the second gear pair;
In the parallel first-gear driving mode, the first clutch is combined, the second clutch is positively overrun and separated, the engine, the generator and the driving motor are in parallel mixed action connection, and power is transmitted to the differential through the second gear pair;
in the parallel second-gear driving mode, the first clutch is separated, the second clutch is reversely overrun-separated, the engine, the generator and the driving motor are in a parallel mixed-motion connection state, the power of the engine and the generator is transmitted to the differential through the first gear pair, and the power of the driving motor is transmitted to the differential through the second gear pair;
In the parking power generation mode, the driving motor does not work, the first clutch is separated, the second clutch is positively overrun-separated, and the engine drives the generator to generate power and supplies electric energy to the power battery;
In the braking energy recovery mode, the engine and the generator do not work, the first clutch is separated, the second clutch is reversely overrun-separated, the driving motor generates electricity, and vehicle braking energy is converted into electric energy to be stored in the power battery.
4. A vehicle comprising a two-motor electromechanical coupling system as claimed in any one of claims 1 to 3.
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