CN109305029B - Hybrid power system and control method - Google Patents

Hybrid power system and control method Download PDF

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Publication number
CN109305029B
CN109305029B CN201811433079.1A CN201811433079A CN109305029B CN 109305029 B CN109305029 B CN 109305029B CN 201811433079 A CN201811433079 A CN 201811433079A CN 109305029 B CN109305029 B CN 109305029B
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motor
controlling
engine
state
synchronizer
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CN109305029A (en
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顾存行
耿丽珍
周之光
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Chery Automobile Co Ltd
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Chery Automobile 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
    • B60K6/365—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 with the gears having orbital motion
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/20—Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration

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

Abstract

The invention discloses a hybrid power system and a control method, comprising the following steps: the planetary gear train is positioned in a rotor of the first motor, a gear ring is fixedly connected with the rotor of the first motor, a center wheel is coaxially connected with an output shaft of the engine, a planet carrier is coaxially connected with an input gear of the second gear train, the rotor of the first motor is in transmission connection with the first gear train, a spindle is in transmission connection with an output shaft of the second motor, the spindle is in transmission connection with a wheel, and the synchronizer can be switched among a first state, a second state and a third state. The hybrid power system can realize multiple working modes, fully play the roles of the engine, the first motor and the second motor and improve the working efficiency of the hybrid power system.

Description

Hybrid power system and control method
Technical Field
The invention relates to the field of automobiles, in particular to a hybrid power system and a control method.
Background
As a fast-paced and efficient transportation tool in life, the number of automobiles is increased year by year in recent years, however, most of traditional automobiles use fossil fuels (such as gasoline, diesel oil and the like) to provide power for engines, and exhaust gas of the traditional automobiles causes pollution to the environment and does not meet the requirements of energy conservation and environmental protection. Therefore, it is not always slow to use new pollution-free energy (such as electric energy) to replace fossil fuel to power automobiles.
The prior art provides a hybrid system suitable for an automobile, comprising: the motor comprises an engine, a first motor, a second motor and a first planetary gear train. The output shaft of the engine is coaxially connected with a planet wheel carrier of the first planetary gear train, the output shaft of the first motor is coaxially connected with a center wheel of the first planetary gear train, the output shaft of the second motor is coaxially connected with a gear ring of the first planetary gear train, and the gear ring of the first planetary gear train is in transmission connection with wheels. The hybrid power system has a single working mode and is difficult to meet the requirements of people.
Disclosure of Invention
The embodiment of the invention provides a hybrid power system, which can realize multiple working modes, fully play the roles of an engine, a first motor and a second motor, improve the working efficiency of the hybrid power system, enable an automobile to enter a high-speed driving state quickly and reduce the energy consumption of the hybrid power system. The technical scheme is as follows:
in one aspect, an embodiment of the present invention provides a hybrid system, including: the planetary gear train comprises an engine, a planetary gear train, a first motor, a second motor, a main shaft, a first gear train, a second gear train, a synchronizer and a power supply assembly for supplying power to the first motor and the second motor, wherein the planetary gear train comprises: the central gear is arranged in the gear ring, the planet gear is rotatably arranged on the planet carrier, the planet gear is positioned between the central gear and the gear ring and is meshed with the central gear and the gear ring, the planetary gear train is positioned in the rotor of the first motor, the gear ring is fixedly connected with the rotor of the first motor, the central gear is coaxially connected with the output shaft of the engine, the planet carrier is coaxially connected with the input gear of the second gear train, the rotor of the first motor is in transmission connection with the input gear of the first gear train, the output gear of the first gear train and the output gear of the second gear train are both rotatably sleeved on the main shaft relative to the main shaft, the main shaft is in transmission connection with the output shaft of the second motor, and the main shaft is in transmission connection with the wheel, the synchronizer is sleeved on the main shaft and can be switched among a first state, a second state and a third state, and when the synchronizer is switched to the first state, the synchronizer is in transmission connection with the main shaft and an output gear of the first gear train; when the synchronizer is switched to the second state, the synchronizer is in transmission connection with the main shaft and an output gear of the second gear train; when the synchronizer is switched to the third state, the output gear of the first gear train and the output gear of the second gear train are disconnected with the spindle.
In an implementation manner of the embodiment of the present invention, the hybrid system further includes a flywheel damper, a damping disc of the flywheel damper is coaxially connected to the output shaft of the engine, and a disc core of the flywheel damper is coaxially connected to the center wheel.
In another implementation manner of the embodiment of the present invention, the hybrid system further includes a clutch, a transmission portion of the clutch is coaxially connected with the central wheel, and a lock portion of the clutch is fixedly connected with the rotor of the first electric machine.
In another implementation of the embodiment of the invention, the hybrid system further includes a brake for braking the output shaft of the engine.
In another aspect, an embodiment of the present invention provides a control method of a hybrid power system, the control method is used for controlling the hybrid power system to switch into a pure electric mode, an engine-only mode, a hybrid driving mode, a driving charging mode or an energy recovery mode, the hybrid driving mode includes a single-motor hybrid driving mode and a dual-motor hybrid driving mode, and the driving charging mode includes a single-motor charging mode and a dual-motor charging mode.
Further, when the hybrid power system is controlled to be switched to the pure electric mode, the method comprises the following steps: controlling the engine and the second motor not to work, controlling the synchronizer to be switched to the first state, and controlling the first motor to work; controlling the engine and the second motor not to work, controlling the synchronizer to be switched to the second state, and controlling the first motor to work; controlling the engine and the first motor not to work, controlling the synchronizer to be switched to the third state, and controlling the second motor to work; controlling the engine not to work, controlling the synchronizer to be switched to the first state, and controlling the first motor and the second motor to work; and controlling the engine not to work, controlling the synchronizer to be switched to the second state, and controlling the first motor and the second motor to work.
Further, when controlling the hybrid system to switch to the engine-only mode, the method includes: controlling the first motor and the second motor not to work, controlling the synchronizer to be switched to the first state, and controlling the engine to work; and controlling the first motor and the second motor not to work, controlling the synchronizer to be switched to the second state, and controlling the engine to work.
Further, when the hybrid system is controlled to be switched to the hybrid drive mode, the method includes: in the single-motor hybrid driving mode, the second motor is controlled not to work, the synchronizer is controlled to be switched to the first state, and the engine and the first motor are controlled to work; or controlling the second motor not to work, controlling the synchronizer to be switched to the second state, and controlling the engine and the first motor to work; or controlling the first motor not to work, controlling the synchronizer to be switched to the first state, and controlling the engine and the second motor to work; or controlling the first motor not to work, controlling the synchronizer to be switched to the second state, and controlling the engine and the second motor to work; in the dual-motor hybrid driving mode, the synchronizer is controlled to be switched to the first state, and the engine, the first motor and the second motor are controlled to work; or controlling the synchronizer to switch to the second state, and controlling the engine, the first motor and the second motor to work; or controlling the synchronizer to switch to the third state, controlling the engine and the second motor to work, and controlling the engine to drive the first motor to generate power.
Further, when the hybrid power system is controlled to be switched to the driving charging mode, the method comprises the following steps: in the single-motor charging mode, the second motor is controlled not to work, the synchronizer is controlled to be switched to the first state, the engine is controlled to work, and the engine is controlled to drive the first motor to generate power; or controlling the second motor not to work, controlling the synchronizer to be switched to the second state, controlling the engine to work, and controlling the engine to drive the first motor to generate power; or controlling the first motor not to work, controlling the synchronizer to be switched to the first state, controlling the engine to work, and controlling the engine to drive the second motor to generate power; or controlling the first motor not to work, controlling the synchronizer to be switched to the second state, controlling the engine to work, and controlling the engine to drive the second motor to generate power; in the dual-motor charging mode, the synchronizer is controlled to be switched to the first state, the engine is controlled to work, and the engine is controlled to drive the first motor and the second motor to generate power; or controlling the synchronizer to switch to the second state, controlling the engine to work, and controlling the engine to drive the first motor and the second motor to generate power.
Further, when the hybrid power system is controlled to be switched to the energy recovery mode, the method comprises the following steps: controlling the engine not to work, controlling the synchronizer to be switched to the first state or the second state, and controlling the first motor or/and the second motor to generate power; or controlling the engine to work, controlling the synchronizer to be switched to the first state or the second state, and controlling the first motor or/and the second motor to generate power.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the embodiment of the invention realizes the pure engine mode or the pure electric mode of the hybrid power system by controlling the work of the engine or the first motor and the second motor; controlling at least one of the engine and the first motor or the second motor to work simultaneously to realize a hybrid driving mode of the hybrid power system; in addition, when the electric quantity stored by the power supply assembly is insufficient, the engine can be controlled to drive the first motor to generate electricity, the power supply assembly is charged, and the cruising ability of the automobile is enhanced. The hybrid power system provided by the invention realizes multiple working modes, fully plays the roles of the engine, the first motor and the second motor, and improves the working efficiency of the hybrid power system. Meanwhile, the invention is also provided with a synchronizer which can be switched to a first state and a second state, and the first state connects the main shaft with the first gear train in a transmission way, and the second state connects the main shaft with the second gear train in a transmission way, so that the automobile runs through the gear trains with different transmission ratios, the gear shifting and the speed changing of the automobile can be realized, and the driving requirements can be met. In addition, the planetary gear train is arranged in the rotor of the first motor in the embodiment of the invention, so that the space of the cabin occupied by each part in the hybrid power system can be saved, and the vehicle is lighter.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a hybrid powertrain system provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a synchronizer of a hybrid powertrain system being switched to a second state in accordance with an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a synchronizer of a hybrid power system switching to a third state according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a hybrid system according to an embodiment of the present invention, and as shown in fig. 1, the hybrid system includes: the planetary gear set comprises an engine 1, a planetary gear set 2, a first motor 3, a second motor 4, a main shaft 6, a first gear train 71, a second gear train 72, a synchronizer 8 and a power supply assembly 5 for supplying power to the first motor 3 and the second motor 4.
Wherein the first gear train 71 includes an input gear 711 and an output gear 712, the input gear 711 and the output gear 712 being engaged with each other. The second gear train 72 includes an input gear 721 and an output gear 722, the input gear 721 and the output gear 722 being intermeshed.
In other embodiments of the invention, the first gear train 71 and the second gear train 72 may also comprise a plurality of gears, which are drivingly connected together.
The planetary gear train 2 includes: the planetary gear set comprises a gear ring 21, a central wheel 22, planetary wheels 23 and a planetary carrier 24, wherein the central wheel 22 is arranged in the gear ring 21, the planetary wheels 23 are rotatably arranged on the planetary carrier 24, and the planetary wheels 23 are positioned between the central wheel 22 and the gear ring 21 and are meshed with the central wheel 22 and the gear ring 21. The planetary gear train 2 is located in the rotor 30 of the first motor 3, the ring gear 21 is fixedly connected with the rotor 30 of the first motor 3, the central gear 22 is coaxially connected with the output shaft of the engine 1, the planet carrier 24 is coaxially connected with the input gear 721 of the second gear train 72, and the rotor 30 of the first motor 3 is in transmission connection with the input gear 711 of the first gear train 71.
The output gear 712 of the first gear train 71 and the output gear 722 of the second gear train 72 are both rotatably sleeved on the spindle 6 relative to the spindle 6, the spindle 6 is in transmission connection with the output shaft of the second motor 4, and the spindle 6 is in transmission connection with wheels. In this embodiment, the hybrid system further includes a third gear train 73 and a fourth gear train 74, a rotor of the second motor 4 is coaxially connected with an input gear of the third gear train 73, an output gear of the third gear train 73 is coaxially connected with the spindle 6, an input gear of the fourth gear train 74 is coaxially connected with the spindle 6, and an output gear of the fourth gear train 74 is in transmission connection with a wheel.
In other embodiments of the present invention, the third gear train 73 and the fourth gear train 74 may also include three or more gears, and the gears are drivingly connected together.
In this embodiment, the synchronizer 8 is sleeved in the main shaft 6, the synchronizer 8 can be switched among a first state, a second state and a third state, and when the synchronizer 8 is switched to the first state, the synchronizer 8 is in transmission connection with the main shaft 6 and the output gear 712 of the first gear train 71; when the synchronizer 8 is switched to the second state, the synchronizer 8 drivingly connects the main shaft 6 and the output gear 722 of the second gear train 72; when the synchronizer 8 is switched to the third state, the output gear 712 of the first gear train 71, the output gear 722 of the second gear train 72 are both disconnected from the main shaft 6.
The embodiment of the invention realizes the pure engine mode or the pure electric mode of the hybrid power system by controlling the work of the engine or the first motor and the second motor; controlling at least one of the engine and the first motor or the second motor to work simultaneously to realize a hybrid driving mode of the hybrid power system; in addition, when the electric quantity stored by the power supply assembly is insufficient, the engine can be controlled to drive the first motor to generate electricity, the power supply assembly is charged, and the cruising ability of the automobile is enhanced. The hybrid power system provided by the invention realizes multiple working modes, fully plays the roles of the engine, the first motor and the second motor, and improves the working efficiency of the hybrid power system. Meanwhile, the invention is also provided with a synchronizer which can be switched to a first state and a second state, and the first state connects the main shaft with the first gear train in a transmission way, and the second state connects the main shaft with the second gear train in a transmission way, so that the automobile runs through the gear trains with different transmission ratios, the gear shifting and the speed changing of the automobile can be realized, and the driving requirements can be met. In addition, the planetary gear train is arranged in the rotor of the first motor in the embodiment of the invention, so that the space of the cabin occupied by each part in the hybrid power system can be saved, and the vehicle is lighter.
As shown in fig. 1, the hybrid system further includes a flywheel damper, a damper disc 91 of which is coaxially connected to the output shaft of the engine 1, and a disc core 92 of which is coaxially connected to the center wheel 22. By providing a flywheel damper between the output shaft of the engine 1 and the center wheel 22, torsional vibration caused by torque fluctuation of the crankshaft of the engine 1 can be attenuated, and the engine 1 can be operated more stably.
As shown in fig. 1, the hybrid system further includes a clutch 93, a transmission portion of the clutch 93 is coaxially connected to the center wheel 22, and a lock portion of the clutch 93 is fixedly connected to the rotor 30 of the first electric machine 3. Therefore, the power of the engine 1 can be directly output to the rotor 30 of the first motor 3, and the power loss in the process that the power is transmitted to the rotor 30 of the first motor 3 after passing through the planetary gear train 2 is avoided. When the hybrid system requires the engine 1 to drive the first electric machine 3, the power of the engine 1 can be maximally utilized by the first electric machine 3 by closing the clutch 93.
Optionally, the hybrid system further includes a brake 10 for braking the output shaft of the engine 1. The brake 10 is provided to block the power transmission between the engine 1 and the first electric machine 3, and may be used when the hybrid system requires only the first electric machine 3 to operate and the engine 1 does not operate. This can avoid power loss caused by the transmission of the power of the first motor 3 to the output shaft of the engine 1, and make the power of the first motor 3 fully utilized.
In the embodiment of the present invention, the power supply unit 5 includes: a battery 51 and two inverters 52, one of the two inverters 52 being connected between the battery 51 and the first motor 3, and the other of the two inverters 52 being connected between the battery 51 and the second motor 4. In the embodiment of the present invention, two inverters 52 are provided, one for connecting the battery 51 and the first motor 3, and the other for connecting the battery 51 and the second motor 4. The battery 51 is a rechargeable battery 51, and the inverter 52 is disposed on an output circuit of the battery 51, and is configured to convert a direct current output by the battery 51 into a three-phase alternating current to drive the first motor 3 or the second motor 4. In addition, the inverter 52 and the transformer are integrated together in the embodiment of the invention, so that the installation is convenient and the installation space is saved.
The embodiment of the invention provides a control method of a hybrid power system, which is used for controlling the hybrid power system to be switched into a pure electric mode, a pure engine mode, a hybrid driving mode, a driving charging mode or an energy recovery mode. The hybrid driving mode comprises a single-motor hybrid driving mode and a double-motor hybrid driving mode, and the driving charging mode comprises a single-motor charging mode and a double-motor charging mode.
In some embodiments of the invention, when controlling the hybrid powertrain to switch to electric-only mode, the method comprises:
as shown in fig. 1, in the electric only mode, the engine 1 and the second motor 4 are controlled not to operate, and the synchronizer 8 is controlled to switch to the first state, so as to control the first motor 3 to operate. Wherein the synchronizer 8 engages the output gear 712 of the first gear train 71, the power of the first motor 3 is transmitted to the output gear 712 of the first gear train 71 through the input gear 711 of the first gear train 71, and then the power is transmitted to the fourth gear train 74 through the main shaft 6, and the power is transmitted to the wheels by the fourth gear train 74, thereby driving the vehicle to travel. In this mode, the brake 10 is engaged or disengaged, the transmission part and the locking part of the clutch 93 are disengaged, the second electric machine 4 is in a non-operating state, the rotor of the second electric machine 4 can rotate together with the main shaft 6, but the second electric machine 4 does not output torque.
In another electric-only mode of the present embodiment, as shown in fig. 2, the engine 1 and the second electric machine 4 are controlled not to operate, the synchronizer 8 is controlled to switch to the second state, and the first electric machine 3 is controlled to operate. The synchronizer 8 engages with the output gear 722 of the second gear train 72, the power of the first motor 3 is transmitted to the output gear 722 through the gear ring 21, the planet carrier 24 and the input gear 721 of the second gear train 72 in sequence, then the power is transmitted to the fourth gear train 74 through the main shaft 6, the power is transmitted to wheels through the fourth gear train 74, and the vehicle is driven to run, in this mode, the brake 10 is engaged, the transmission part and the locking part of the clutch 93 are separated, the second motor 4 is in a non-operating state, the rotor of the second motor 4 can rotate together with the main shaft 6, but the second motor 4 does not output torque.
In another electric-only mode of the present embodiment, as shown in fig. 3, the engine 1 and the first electric machine 3 are controlled not to operate, the synchronizer 8 is controlled to switch to the third state, and the second electric machine 4 is controlled to operate. The synchronizer 8 is switched to the third state, and the output gear 712 of the first gear train 71 and the output gear 722 of the second gear train 72 are disconnected from the main shaft 6. Neither the engine 1 nor the first motor 3 transmits power, and the power of the second motor 4 is transmitted to the main shaft 6 through the third gear train 73, then transmitted to the fourth gear train 74 through the main shaft 6, and transmitted to the wheels through the fourth gear train 74, thereby driving the vehicle to run.
In another electric-only mode of the present embodiment, the engine 1 is controlled not to operate, the synchronizer 8 is controlled to switch to the first state, and the first motor 3 and the second motor 4 are controlled to operate. Wherein the synchronizer 8 engages the output gear 712 of the first gear train 71, the power of the first motor 3 is transmitted to the output gear 712 of the first gear train 71 through the input gear 711 of the first gear train 71, the power of the second motor 4 is transmitted to the main shaft 6 through the third gear train 73, and then the power of the first motor 3 and the power of the second motor 4 together transmit the power to the wheels through the fourth gear train 74, thereby driving the vehicle to run, in which the brake 10 is engaged or disengaged and the clutch 93 is disengaged.
In another electric-only mode of the present embodiment, the engine 1 is controlled not to operate, the synchronizer 8 is controlled to switch to the second state, and the first motor 3 and the second motor 4 are controlled to operate. Wherein, the synchronizer 8 engages the output gear 722 of the second gear train 72, the power of the first motor 3 is transmitted to the output gear 722 through the ring gear 21, the planet carrier 24 and the input gear 721 of the second gear train 72 in sequence, the power of the second motor 4 is transmitted to the main shaft 6 through the third gear train 73, and then the power of the first motor 3 and the power of the second motor 4 are jointly transmitted to the wheels through the fourth gear train 74, thereby driving the vehicle to run, in which the brake 10 is engaged and the clutch 93 is disengaged.
In the embodiment of the invention, when the vehicle is in a pure electric mode and the engine 1 is required to be started, the brake 10 can be disengaged, the clutch 93 can be engaged, the planetary gear train 2 is locked into a rigid body by the engagement of the clutch 93, and the engine 1 is driven to rotate in the forward direction through the rotation of the first motor 3 so as to start the engine 1.
In another implementation manner of the embodiment of the invention, when the hybrid power system is controlled to be switched to the pure engine mode, the method comprises the following steps:
in the engine-only mode, the first motor 3 and the second motor 4 are controlled not to work, the synchronizer 8 is controlled to be switched to the first state (see fig. 1), and the engine 1 is controlled to work. Wherein, the engine 1 is in a working state, the first motor 3 and the second motor 4 are both in a follow-up state, the first motor 3 and the second motor 4 do not output torque, the brake 10 is separated, and the transmission part and the locking part of the clutch 93 are engaged. In this mode, the synchronizer 8 engages the output gear 712 of the first gear train 71, the power of the engine 1 is transmitted to the output gear 712 of the first gear train 71 through the center gear 22, the carrier 24, the ring gear 21, the input gear 711 of the first gear train 71 in this order, and then the power is transmitted to the wheels through the fourth gear train 74, thereby driving the vehicle to travel.
In another engine-only mode of the present embodiment, the first motor 3 and the second motor 4 are controlled not to operate, the synchronizer 8 is controlled to switch to the second state (see fig. 2), and the engine 1 is controlled to operate. Wherein the synchronizer 8 engages the output gear 722 of the second gear train 72, the power of the engine 1 is transmitted to the output gear 722 of the second gear train 72 through the center gear 22, the carrier 24, the input gear 721 of the second gear train 72, and then the power is transmitted to the wheels through the fourth gear train 74, thereby driving the vehicle to run.
In another implementation manner of the embodiment of the invention, when the hybrid power system is controlled to be switched to the hybrid driving mode, the method includes:
in the single-motor hybrid driving mode, the second motor 4 is controlled not to operate, the synchronizer 8 is controlled to be switched to the first state, and the engine 1 and the first motor 3 are controlled to operate. The engine 1 is in an operating state, the first electric machine 3 is in an electric state, the brake 10 is disengaged, and the clutch 93 is engaged. In this mode, the synchronizer 8 engages the output gear 712 of the first gear train 71, and the power of the engine 1 is coupled to the power of the first motor 3 through the sun gear 22, the carrier 24, and the ring gear 21 in this order, and then transmitted from the input gear 711 of the first gear train 71 to the output gear 712 of the first gear train 71, and then transmitted to the wheels through the fourth gear train 74, thereby driving the vehicle to travel. In this mode, the second motor 4 is in a follow-up state, and the second motor 4 does not output torque.
In another single-motor hybrid driving mode of the present embodiment, the second motor 4 is controlled not to operate, the synchronizer 8 is controlled to switch to the second state, and the engine 1 and the first motor 3 are controlled to operate. Wherein the engine 1 is in an operating state, the first electric machine 3 is in an electric state, the brake 10 is disengaged, and the clutch 93 is engaged or disengaged. In this mode, the synchronizer 8 engages the output gear 722 of the second gear train 72, the power of the engine 1 is coupled with the power of the first motor 3 through the sun gear 22 and the carrier 24 in order, then is transmitted to the output gear 722 of the second gear train 72 through the input gear 721 of the second gear train 72, and then is transmitted to the wheels through the fourth gear train 74, so that the vehicle is driven to run, and in this mode, the second motor 4 is in a follow-up state, and the second motor 4 does not output torque.
In another single-motor hybrid driving mode of the present embodiment, the first motor 3 is controlled not to operate, the synchronizer 8 is controlled to switch to the first state, and the engine 1 and the second motor 4 are controlled to operate. The engine 1 is in a working state, the second motor 4 is in an electric state, the brake 10 is disengaged, the clutch 93 is engaged or disengaged, the synchronizer 8 is engaged with the output gear 712 of the first gear train 71 in the mode, the power of the engine 1 is transmitted to the output gear 712 of the first gear train 71 from the input gear 711 of the first gear train 71 through the central gear 22, the planet carrier 24 and the ring gear 21 in sequence, the power of the second motor 4 is transmitted to the spindle 6 through the third gear train 73, and then the two parts of power are jointly transmitted to wheels through the fourth gear train 74 to drive the vehicle to run, and the first motor 3 is in a follow-up state in the mode and does not output torque.
In another single-motor hybrid driving mode of the present embodiment, the first motor 3 is controlled not to operate, the synchronizer 8 is controlled to switch to the second state, and the engine 1 and the second motor 4 are controlled to operate. The engine 1 is in a working state, the second motor 4 is in an electric state, the brake 10 is disengaged, the clutch 93 is engaged or disengaged, the synchronizer 8 is engaged with the output gear 722 of the second gear train 72 in the mode, the power of the engine 1 is sequentially input to the planet carrier 24 through the center wheel 22 and transmitted to the output gear 722 of the second gear train 72 through the input gear 721 of the second gear train 72, the power of the second motor 4 is transmitted to the spindle 6 through the third gear train 73, and then the two parts of power are jointly transmitted to wheels through the fourth gear train 74 to drive the vehicle to run, and the first motor 3 is in a follow-up state in the mode and does not output torque.
In the two-motor hybrid driving mode, the control synchronizer 8 is switched to the first state, and the engine 1, the first motor 3 and the second motor 4 are controlled to work. Wherein the engine 1 is in an operating state, the first motor 3 and the second motor 4 are both in an electric state, the brake 10 is disengaged, and the clutch 93 is engaged. In this mode, the synchronizer 8 engages the output gear 712 of the first gear train 71, the power of the engine 1 is transmitted to the output gear 712 of the first gear train 71 from the input gear 711 of the first gear train 71 after being coupled with the power of the motor through the central gear 22, the planet carrier 24 and the ring gear 21, the power of the second motor 4 is transmitted to the main shaft 6 through the third gear train 73, and then the three power are jointly transmitted to the wheels through the fourth gear train 74, so that the vehicle is driven to run.
In another two-motor hybrid driving mode of the present embodiment, the synchronizer 8 is controlled to switch to the second state, and the engine 1, the first motor 3, and the second motor 4 are controlled to operate. Wherein the engine 1 is in a working state, the first motor 3 and the second motor 4 are both in an electric state, the brake 10 is disengaged, and the clutch 93 is engaged or disengaged. In this mode, the synchronizer 8 engages the output gear 722 of the second gear train 72, the power of the engine 1 is coupled with the power of the first motor 3 through the central gear 22 and the planet carrier 24, and then is transmitted to the output gear 722 of the second gear train 72 through the input gear 721 of the second gear train 72, the power of the second motor 4 is transmitted to the main shaft 6 through the third gear train 73, and then the three power are jointly transmitted to the wheels through the fourth gear train 74, so that the vehicle is driven to run.
In another two-motor hybrid driving mode of the present embodiment, the synchronizer 8 is controlled to switch to the third state, the engine 1 and the second motor 4 are controlled to operate, and the engine 1 is controlled to drive the first motor 3 to generate power. The brake 10 is disengaged, the clutch 93 is engaged, and the synchronizer 8 is in the third state, in which the synchronizer 8 is not engaged with the output gear 712 of the first gear train 71 or the output gear 722 of the second gear train 72. The engine 1 is in a working state, and controls the first motor 3 to enter a power generation mode. At this time, the second motor 4 obtains energy from the power supply assembly 5 and is in an electric state, and the power of the second motor 4 is transmitted to the main shaft 6 through the third gear train 73 and then transmitted to the wheels through the fourth gear train 74, thereby driving the vehicle to run.
In another implementation manner of the embodiment of the present invention, when the hybrid power system is controlled to be switched to the driving charging mode, the method includes:
in the single-motor charging mode, the second motor 4 is controlled not to work, the synchronizer 8 is controlled to be switched to the first state, the engine 1 is controlled to work, and the engine 1 is controlled to drive the first motor 3 to generate power. The engine 1 is in an operating state, the first electric machine 3 is in a power generating state, the brake 10 is disengaged, and the clutch 93 is engaged. In this mode, the synchronizer 8 engages the output gear 712 of the first gear train 71, the power of the engine 1 is transmitted sequentially through the sun gear 22, the carrier 24, and the ring gear 21, a part of the power is used for power generation of the first motor 3, a part of the power is transmitted from the input gear 711 of the first gear train 71 to the output gear 712 of the first gear train 71, and then the power is transmitted to the wheels through the fourth gear train 74, thereby driving the vehicle to run, and in this mode, the second motor 4 is in a follow-up state, and the second motor 4 does not output torque.
In another single-motor charging mode of the present embodiment, the second motor 4 is controlled not to operate, the synchronizer 8 is controlled to switch to the second state, the engine 1 is controlled to operate, and the engine 1 is controlled to drive the first motor 3 to generate power. The engine 1 is in an operating state, the first motor 3 is in a power generating state, the brake 10 is disengaged, the clutch 93 is engaged or disengaged, and when the synchronizer 8 engages the output gear 722 of the second gear train 72, the power of the engine 1 is transmitted sequentially through the sun gear 22 and the carrier 24. A part of the power is transmitted from the ring gear 21 to the first motor 3 for generating electricity, and a part of the power is transmitted from the input gear 721 of the second gear train 72 to the output gear 722 of the second gear train 72, and then the power is transmitted to the wheels through the fourth gear train 74, thereby driving the vehicle to run, in which the second motor 4 is in a follow-up state and the second motor 4 does not output torque.
When the clutch 93 is disengaged, it can be used in a starting mode of the vehicle. At this time, the engine 1 is in a working state and the vehicle is requested to start. When the vehicle starts using this mode, the clutch 93 can be protected without slipping.
In another single-motor charging mode of the present embodiment, the first motor 3 is controlled not to operate, the synchronizer 8 is controlled to switch to the first state, the engine 1 is controlled to operate, and the engine 1 is controlled to drive the second motor 4 to generate power. Wherein the engine 1 is in an operating state, the second motor 4 is in a power generating state, the brake 10 is disengaged, and the clutch 93 is engaged or disengaged. In this mode, the synchronizer 8 engages the output gear 712 of the first gear train 71, and the power of the engine 1 passes through the sun gear 22, the carrier 24, and the ring gear 21 in this order, and is transmitted from the input gear 711 of the first gear train 71 to the output gear 712 of the first gear train 71. A part of the power is transmitted to the main shaft 6 through the output gear 712 of the first gear train 71 and then transmitted to the second motor 4 through the third gear train 73 for generating electricity, and a part of the power is transmitted to the wheels through the fourth gear train 74, thereby driving the vehicle to run. In this mode, the first motor 3 is in a follow-up state and does not output torque.
In another single-motor charging mode of the present embodiment, the first motor 3 is controlled not to operate, the synchronizer 8 is controlled to switch to the second state, the engine 1 is controlled to operate, and the engine 1 is controlled to drive the second motor 4 to generate power. Wherein the engine 1 is in an operating state, the second motor 4 is in a power generating state, the brake 10 is disengaged, and the clutch 93 is engaged or disengaged. At this time, the synchronizer 8 engages the output gear 722 of the second gear train 72, and the power of the engine 1 is input to the carrier 24 through the sun gear 22 in order, and is transmitted to the output gear 722 of the second gear train 72 from the input gear 721 of the second gear train 72. A part of the power is transmitted to the main shaft 6 through the output gear 712 of the first gear train 71 and then transmitted to the second motor 4 through the third gear train 73 for generating electricity, and a part of the power is transmitted to the wheels through the fourth gear train 74, thereby driving the vehicle to run. In this mode, the first motor 3 is in a follow-up state and does not output torque.
In the dual-motor charging mode, the synchronizer 8 is controlled to be switched to the first state, the engine 1 is controlled to work, and the engine 1 is controlled to drive the first motor 3 and the second motor 4 to generate power. Wherein the engine 1 is in an operating state, the first motor 3 and the second motor 4 are both in a power generating state, the brake 10 is disengaged, and the clutch 93 is engaged. At this time, the synchronizer 8 engages the output gear 712 of the first gear train 71, and the power of the engine 1 is transmitted through the sun gear 22, the carrier 24, and the ring gear 21 in this order. Part of the power is used for power generation of the first motor 3, part of the power is transmitted to an output gear 712 of the first gear train 71 from an input gear 711 of the first gear train 71, part of the remaining power is transmitted to the second motor 4 for power generation from a third gear train 73, and part of the remaining power transmits the power to wheels through a fourth gear train 74, so that the vehicle is driven to run.
In another two-motor charging mode of the present embodiment, the synchronizer 8 is controlled to switch to the second state, the engine 1 is controlled to operate, and the engine 1 is controlled to drive the first motor 3 and the second motor 4 to generate power. Wherein the engine 1 is in a working state, the first motor 3 and the second motor 4 are both in a power generation state, the brake 10 is disengaged, and the clutch 93 is engaged or disengaged. At this time, the synchronizer 8 engages the output gear 722 of the second gear train 72, and the power of the engine 1 is transmitted through the sun gear 22 and the carrier 24 in this order. A part of the power is transmitted from the ring gear 21 to the first motor 3 for generating electricity, a part of the power is transmitted from the input gear 721 of the second gear train 72 to the output gear 722 of the second gear train 72, a part of the remaining power is transmitted from the third gear train 73 to the second motor 4 for generating electricity, and a part of the remaining power transmits the power to the wheels through the fourth gear train 74, thereby driving the vehicle to run.
In another implementation manner of the embodiment of the invention, when the hybrid power system is controlled to be switched to the energy recovery mode, the method includes:
in the energy recovery mode, the engine 1 is controlled not to work, the synchronizer 8 is controlled to be switched to the first state or the second state, and the first motor 3 or/and the second motor 4 are controlled to generate electricity.
The brake 10 is engaged, the clutch 93 is disengaged, and the engine 1 is stopped.
When the synchronizer 8 engages the output gear 712 of the first gear train 71, the kinetic energy of the vehicle is transmitted to the fourth gear train 74 through the wheels at the time of deceleration or braking, and then transmitted to the first motor 3 through the synchronizer 8, the output gear 712 of the first gear train 71, and the input gear 711 of the first gear train 71 in order, so that the first motor 3 is energized, and the first motor 3 is controlled to enter the power generation mode.
When the synchronizer 8 engages the output gear 722 of the second gear train 72, the kinetic energy of the vehicle is transmitted to the fourth gear train 74 through the wheels at the time of deceleration or braking, and then transmitted to the first motor 3 sequentially through the synchronizer 8, the output gear 722 of the second gear train 72, the input gear 721 of the second gear train 72, the carrier 24, and the ring gear 21, so that the first motor 3 is energized, and the first motor 3 is controlled to enter the power generation mode.
In this mode, the energy transmitted from the kinetic energy of the vehicle through the wheels during deceleration or braking may be controlled to enter the power generation mode to generate power together with the first motor 3. As described above, the second motor 4 may be in the follow-up state and the torque is not output, and the first motor 3 may be caused to generate power alone, or both the engine 1 and the first motor 3 may be caused to stop and the second motor 4 may be caused to generate power alone.
In another energy recovery mode of the embodiment, the engine 1 is controlled to operate, the synchronizer 8 is controlled to switch to the first state or the second state, and the first motor 3 or/and the second motor 4 are controlled to generate electricity.
The brake 10 is disengaged, the clutch 93 is disengaged, and the engine 1 is in an operating state.
When the synchronizer 8 engages the output gear 712 of the first gear train 71, the kinetic energy of the vehicle is transmitted to the fourth gear train 74 through the wheels at the time of deceleration or braking, and then transmitted to the first motor 3 through the synchronizer 8, the output gear 712 of the first gear train 71, and the input gear 711 of the first gear train 71 in order, so that the first motor 3 is energized, and the motors are controlled to enter the power generation mode.
When the synchronizer 8 engages the output gear 722 of the second gear train 72, the kinetic energy of the vehicle is transmitted to the fourth gear train 74 through the wheels at the time of deceleration or braking, and then transmitted to the first electric machine 3 through the synchronizer 8, the output gear 722 of the second gear train 72, the input gear 721 of the second gear train 72, the carrier 24, and the ring gear 21 in this order, so that the first electric machine 3 obtains energy, and the electric machine is controlled to enter the power generation mode.
In this mode, the energy transmitted from the kinetic energy of the vehicle through the wheels during deceleration or braking may be controlled to enter the power generation mode to generate power together with the first motor 3. As described above, the second motor 4 may be in the follow-up state and the first motor 3 may be caused to generate power alone without outputting torque. It is also possible to cause the first motor 3 to be in the follow-up state without outputting the torque, and to cause the second motor 4 to generate the power alone.
In another implementation manner of the embodiment of the invention, when the hybrid power system is controlled to be switched to the reverse mode, the method includes:
in one implementation of the reverse mode, the engine 1 is in a stopped state, the first electric machine 3 reverses output power, the brake 10 is engaged or disengaged, and the clutch 93 is disengaged.
When the synchronizer 8 engages the output gear 712 of the first gear train 71, the power of the motor is transmitted to the output gear 712 of the first gear train 71 through the input gear 711 of the first gear train 71 and then to the wheels through the fourth gear train 74, thereby driving the vehicle to reverse the vehicle
When the synchronizer 8 engages the output gear 722 of the second gear train 72, the brake 10 is engaged, the clutch 93 is disengaged, and the power of the motor is transmitted to the output gear 722 of the second gear train 72 through the ring gear 21, the carrier 24, the input gear 721 of the second gear train 72 in order, and then transmitted to the wheels through the fourth gear train 74, thereby driving the vehicle to reverse.
In this mode, the second motor 4 can drive the vehicle in reverse with the first motor 3 by reversing the output power. The second motor 4 can also be in a follow-up state and does not output torque, so that the first motor 3 alone drives the vehicle to reverse. It is also possible to deactivate both the engine 1 and the first electric machine 3 and to drive the vehicle in reverse solely by the second electric machine 4.
In another implementation of the reverse mode, the engine 1 outputs a positive torque in an operating state, the first motor 3 outputs a positive torque in a reverse rotation state in a power generation state, the brake 10 is disengaged, and the clutch 93 is disengaged.
At this time, the synchronizer 8 engages with the output gear 722 of the second gear train 72, the power of the engine 1 is input to the carrier 24 through the center gear 22 in sequence, the power of the first motor 3 is input to the carrier 24 through the ring gear 21, the power of the engine 1 is coupled with the power of the first motor 3, then is transmitted to the output gear 722 of the second gear train 72 through the input gear 721 of the second gear train 72, and then is transmitted to the wheels through the fourth gear train 74 to drive the vehicle to realize reverse. In this mode, the second motor 4 is in a follow-up state, and the second motor 4 does not output torque.
In another implementation manner of the embodiment of the invention, when the hybrid power system is controlled to be switched to the parking power generation mode, the method comprises the following steps:
in one implementation of the parking power generation, the vehicle is stationary, the brake 10 is disengaged, the clutch 93 is engaged, the synchronizer 8 is in the third position, at this time, the synchronizer 8 is not engaged with the output gear 712 of the first gear train 71 and the output gear 722 of the second gear train 72, the engine 1 is in the working state, and the first motor 3 is driven to enter the power generation mode, so that the parking power generation is realized.
In another implementation of park power generation, the brake 10 is disengaged, the clutch 93 is disengaged, and the synchronizer 8 engages the output gear 722 of the second gear train 72, while the output gear 722 of the second gear train 72, the input gear 721 of the second gear train 72, and the carrier 24 are stationary. The engine 1 drives the central wheel 22 to be in a forward rotation state, the planet carrier 24 is static, the gear ring 21 rotates reversely, and at the moment, the first motor 3 enters a power generation mode to realize power generation in a parking mode.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A hybrid system, characterized by comprising:
an engine (1), a planetary gear train (2), a first motor (3), a second motor (4), a main shaft (6), a first gear train (71), a second gear train (72), a synchronizer (8), a clutch (93) and a power supply component (5) for supplying power to the first motor (3) and the second motor (4),
the planetary gear train (2) includes: an annulus (21), a sun gear (22), planet gears (23) and a planet carrier (24), the sun gear (22) being arranged in the annulus (21), the planet gears (23) being rotatably arranged on the planet carrier (24), the planet gears (23) being located between the sun gear (22) and the annulus (21) and being in engagement with the sun gear (22) and the annulus (21), the planetary gear train (2) being located in the rotor (30) of the first electrical machine (3), the annulus (21) being fixedly connected to the rotor (30) of the first electrical machine (3), the sun gear (22) being coaxially connected to the output shaft of the engine (1), the planet carrier (24) being coaxially connected to the input gear (721) of the second gear train (72), the rotor (30) of the first electrical machine (3) being in driving connection with the input gear (711) of the first gear train (71),
an output gear (712) of the first gear train (71) and an output gear (722) of the second gear train (72) are both rotatably sleeved on the spindle (6) relative to the spindle (6), the spindle (6) is in transmission connection with an output shaft of the second motor (4), the spindle (6) is in transmission connection with wheels,
the synchronizer (8) is sleeved on the main shaft (6), the synchronizer (8) can be switched among a first state, a second state and a third state, and when the synchronizer (8) is switched to the first state, the synchronizer (8) is in transmission connection with the main shaft (6) and an output gear (712) of the first gear train (71); when the synchronizer (8) is switched to the second state, the synchronizer (8) drivingly connects the main shaft (6) and an output gear (722) of the second gear train (72); when the synchronizer (8) is switched to the third state, the output gear (712) of the first gear train (71), the output gear (722) of the second gear train (72) are both disconnected from the main shaft (6),
the transmission part of the clutch (93) is coaxially connected with the central wheel (22), and the locking part of the clutch (93) is fixedly connected with the rotor (30) of the first motor (3).
2. The hybrid system according to claim 1, characterized in that it further comprises a flywheel damper, the damper disc (91) of which is coaxially connected to the output shaft of the engine (1), the hub (92) of which is coaxially connected to the central wheel (22).
3. Hybrid system according to claim 1, characterized in that it further comprises a brake (10) for braking the output shaft of the engine (1).
4. A control method of a hybrid system, characterized in that the control method is used for controlling the hybrid system according to any one of claims 1 to 3 to switch to an electric-only mode, an engine-only mode, a hybrid driving mode, a vehicle charging mode or an energy recovery mode, the hybrid driving mode includes a single-motor hybrid driving mode and a two-motor hybrid driving mode, and the vehicle charging mode includes a single-motor charging mode and a two-motor charging mode.
5. The control method according to claim 4, wherein when controlling the hybrid system to switch to the electric-only mode, the method includes:
controlling the engine and the second motor not to work, controlling the synchronizer to be switched to the first state, and controlling the first motor to work;
controlling the engine and the second motor not to work, controlling the synchronizer to be switched to the second state, and controlling the first motor to work;
controlling the engine and the first motor not to work, controlling the synchronizer to be switched to the third state, and controlling the second motor to work;
controlling the engine not to work, controlling the synchronizer to be switched to the first state, and controlling the first motor and the second motor to work;
and controlling the engine not to work, controlling the synchronizer to be switched to the second state, and controlling the first motor and the second motor to work.
6. The control method according to claim 4, characterized in that when controlling the hybrid system to switch to the engine-only mode, the method includes:
controlling the first motor and the second motor not to work, controlling the synchronizer to be switched to the first state, and controlling the engine to work;
and controlling the first motor and the second motor not to work, controlling the synchronizer to be switched to the second state, and controlling the engine to work.
7. The control method according to claim 4, characterized in that when controlling the hybrid system to switch to the hybrid drive mode, the method includes:
in the single-motor hybrid driving mode, the second motor is controlled not to work, the synchronizer is controlled to be switched to the first state, and the engine and the first motor are controlled to work;
or controlling the second motor not to work, controlling the synchronizer to be switched to the second state, and controlling the engine and the first motor to work;
or controlling the first motor not to work, controlling the synchronizer to be switched to the first state, and controlling the engine and the second motor to work;
or controlling the first motor not to work, controlling the synchronizer to be switched to the second state, and controlling the engine and the second motor to work;
in the dual-motor hybrid driving mode, the synchronizer is controlled to be switched to the first state, and the engine, the first motor and the second motor are controlled to work;
or controlling the synchronizer to switch to the second state, and controlling the engine, the first motor and the second motor to work;
or controlling the synchronizer to switch to the third state, controlling the engine and the second motor to work, and controlling the engine to drive the first motor to generate power.
8. The control method according to claim 4, characterized in that when controlling the hybrid system to switch to the drive charging mode, the method includes:
in the single-motor charging mode, the second motor is controlled not to work, the synchronizer is controlled to be switched to the first state, the engine is controlled to work, and the engine is controlled to drive the first motor to generate power;
or controlling the second motor not to work, controlling the synchronizer to be switched to the second state, controlling the engine to work, and controlling the engine to drive the first motor to generate power;
or controlling the first motor not to work, controlling the synchronizer to be switched to the first state, controlling the engine to work, and controlling the engine to drive the second motor to generate power;
or controlling the first motor not to work, controlling the synchronizer to be switched to the second state, controlling the engine to work, and controlling the engine to drive the second motor to generate power;
in the dual-motor charging mode, the synchronizer is controlled to be switched to the first state, the engine is controlled to work, and the engine is controlled to drive the first motor and the second motor to generate power;
or controlling the synchronizer to switch to the second state, controlling the engine to work, and controlling the engine to drive the first motor and the second motor to generate power.
9. The control method according to claim 4, characterized in that when controlling the hybrid system to switch to the energy recovery mode, the method includes:
controlling the engine not to work, controlling the synchronizer to be switched to the first state or the second state, and controlling the first motor or/and the second motor to generate power;
or controlling the engine to work, controlling the synchronizer to be switched to the first state or the second state, and controlling the first motor or/and the second motor to generate power.
CN201811433079.1A 2018-11-28 2018-11-28 Hybrid power system and control method Active CN109305029B (en)

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