CN109017264B - Hybrid power system and control method - Google Patents

Hybrid power system and control method Download PDF

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Publication number
CN109017264B
CN109017264B CN201810861961.XA CN201810861961A CN109017264B CN 109017264 B CN109017264 B CN 109017264B CN 201810861961 A CN201810861961 A CN 201810861961A CN 109017264 B CN109017264 B CN 109017264B
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motor
clutch
gear train
controlled
mode
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CN109017264A (en
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耿丽珍
顾存行
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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
    • 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
    • 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
    • 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
    • B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
    • 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/02—Clutches
    • B60W2710/021—Clutch engagement state
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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

Abstract

The invention discloses a hybrid power system and a control method, comprising the following steps: the double-clutch transmission comprises an engine, a double-clutch assembly, a first gear train, a second gear train, a mode switching clutch, a first motor, a second motor, a first main shaft, a second main shaft and a power supply assembly, wherein an output shaft of the engine is coaxially connected with a first rotating part of the mode switching clutch, a second rotating part of the mode switching clutch is in transmission connection with a rotating shaft of the first motor, the rotating shaft of the first motor is connected with the double-clutch assembly, the first gear train and the second gear train are in transmission connection with wheels, an output shaft of the second motor is in transmission connection with the wheels, and the double-clutch assembly is used for selectively coaxially connecting at most one of an input gear of the first gear train and an input gear of the second gear train with an output shaft of the first motor. The invention can avoid the influence of the rotation of the wheels when the motor drives the engine to start, and prevent the automobile from generating impact.

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 comprising: the motor, main shaft and clutch. The main shaft is coaxially connected with the wheels, the clutch is connected with an output shaft of the engine to control whether the output shaft of the engine is coaxially connected with the main shaft or not, and an output shaft of the motor is in transmission connection with the main shaft. When the electric vehicle works, the motor can directly drive the wheels to rotate, and the engine can drive the wheels only after the clutch is controlled to be closed.
In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:
for the existing hybrid power system, when the vehicle starts, the wheels are usually driven by the motor, and after the vehicle starts, the engine is dragged by the motor to complete the starting of the engine. However, when the motor drives the engine to start, the output shaft of the engine needs to be connected to the main shaft through the clutch, and the output shaft of the engine is impacted when being connected to the main shaft, which is not beneficial to starting the engine.
Disclosure of Invention
The embodiment of the invention provides a hybrid power system which can avoid the influence of wheel rotation when a motor-driven engine is started and prevent an automobile from generating impact. The technical scheme is as follows:
in one aspect, an embodiment of the present invention provides a hybrid system, including: the double-clutch transmission device comprises an engine, a double-clutch assembly, a first gear train, a second gear train, a mode switching clutch, a first motor, a second motor, a first main shaft, a second main shaft and a power supply assembly for supplying power to the first motor and the second motor, wherein an output shaft of the engine is coaxially connected with a first rotating part of the mode switching clutch, a second rotating part of the mode switching clutch is in transmission connection with a rotating shaft of the first motor, the rotating shaft of the first motor is connected with the double-clutch assembly, an input gear of the first gear train is coaxially connected onto the first main shaft, an input gear of the second gear train is sleeved on the first main shaft in a self-rotating manner, an output gear of the first gear train and an output gear of the second gear train are coaxially connected onto the second main shaft, and an output shaft of the second motor is coaxially connected with the first main shaft, the wheels are in driving connection with the second main shaft, and the dual clutch assembly is used for selectively connecting at most one of the input gears of the first gear train and the second gear train with the output shaft of the first motor in a coaxial mode.
In one implementation of the embodiment of the present invention, the dual clutch assembly includes: first clutch, second clutch and clutch supporting disk, the bottom surface of clutch supporting disk with the output shaft coaxial coupling of first motor, the second rotation portion of first clutch with the second rotation portion of second clutch sets up the inner wall of clutch supporting disk, the first rotation portion of first clutch with first main shaft coaxial coupling, the first rotation portion of second clutch with the input gear coaxial coupling of second gear train.
In another implementation manner of the embodiment of the invention, the hybrid power system further comprises a transmission gear train, an input gear of the transmission gear train is coaxially connected with the second spindle, and an output gear of the transmission gear train is coaxially connected with the wheel.
In another implementation manner of the embodiment of the present invention, the power supply module includes: a battery pack and two inverters, one of which is connected between the battery pack and the first motor and the other of which is connected between the battery pack and the second motor.
In another aspect, an embodiment of the present invention provides a control method of a hybrid system, the control method is used for controlling the hybrid system to switch to an electric-only mode, an engine-only mode, a hybrid driving mode, an energy recovery mode or a parking power generation mode, where the electric-only mode includes: a single-motor electric-only mode and a dual-motor electric-only mode, the hybrid drive mode comprising: a single motor hybrid driving mode and a dual motor hybrid driving 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 mode switching clutch to be disconnected, controlling the double-clutch assembly to coaxially connect the input gear of the first gear train or the input gear of the second gear train with the output shaft of the first motor, and controlling the first motor to work; or controlling the engine and the first motor to be out of work, controlling the mode switching clutch to be disconnected, controlling the double-clutch assembly to enable the input gear of the first gear train or the input gear of the second gear train not to be coaxially connected with the output shaft of the first motor, and controlling the second motor to work; in the double-motor pure electric mode, the engine is controlled not to work, the mode switching clutch is controlled to be disconnected, the double-clutch assembly is controlled to coaxially connect the input gear of the first gear train with the output shaft of the first motor, and the first motor and the second motor are controlled to work.
Further, when the hybrid power system is controlled to be switched to the engine-only mode, the method comprises the following steps: controlling the engine to work, controlling the first motor and the second motor to work, controlling the mode switching clutch to be closed, and controlling the double-clutch assembly to coaxially connect the input gear of the first gear train or the input gear of the second gear train with the output shaft of the first motor; or controlling the engine to work, controlling the mode switching clutch to be closed, and controlling the double-clutch assembly to coaxially connect the input gear of the first gear train or the input gear of the second gear train with the output shaft of the first motor, so that the engine drives the first motor or the second motor to generate power.
Further, when the hybrid system is controlled to switch to the hybrid drive mode, the method includes: in the dual-motor hybrid driving mode, the engine is controlled to work, the mode switching clutch is controlled to be closed, the dual-clutch assembly is controlled to coaxially connect an input gear of the first gear train with an output shaft of the first motor, and the first motor and the second motor are controlled to work; in the single-motor hybrid driving mode, the engine is controlled to work, the second motor is controlled not to work, the mode switching clutch is controlled to be closed, the double-clutch assembly is controlled to coaxially connect the input gear of the first gear train or the input gear of the second gear train with the output shaft of the first motor, and the first motor is controlled to work; or, the engine is controlled to work, the first motor is controlled not to work, the mode switching clutch is controlled to be closed, the double-clutch assembly is controlled to coaxially connect the input gear of the first gear train with the output shaft of the first motor, and the second motor is controlled to work; or, the engine is controlled to work, the mode switching clutch is controlled to be closed, the double-clutch assembly is controlled to enable the input gear of the first gear train or the input gear of the second gear train not to be coaxially connected with the output shaft of the first motor, and the power supply assembly is controlled to supply power to the second motor.
Further, when the hybrid power system is controlled to be switched to the energy recovery mode, the method comprises the following steps: and controlling the engine and the first motor not to work, controlling the mode switching clutch to be disconnected, and controlling the double-clutch assembly to enable the input gear of the first gear train or the input gear of the second gear train not to be coaxially connected with the output shaft of the first motor.
Further, when the hybrid power system is controlled to be switched to the parking power generation mode, the method includes: and controlling the engine to work, controlling the second motor to work, controlling the mode switching clutch to be closed, and controlling the double-clutch assembly to enable the input gear of the first gear train or the input gear of the second gear train not to be coaxially connected with the output shaft of the first motor.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a hybrid power system which is provided with an engine, a mode switching clutch, a first motor, a second motor, a power supply set, a double clutch assembly, a first gear train and a second gear train. According to the invention, the output shaft of the engine is connected with the mode switching clutch, the mode switching clutch is in transmission connection with the rotating shaft of the first motor, the rotating shaft of the first motor is connected with the double clutch assembly, and the double clutch assembly realizes power transmission with the wheels through the first gear train or the second gear train.
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 of energy transfer in a single-motor electric-only mode of a hybrid powertrain according to an embodiment of the present invention;
FIG. 3 is a schematic energy transfer diagram of another hybrid powertrain system in a single-motor electric-only mode, according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of energy transfer in a single-motor electric-only mode of yet another hybrid powertrain provided by an embodiment of the present invention;
FIG. 5 is a schematic diagram of energy transfer in a dual-motor electric-only mode of a hybrid power system according to an embodiment of the present invention;
FIG. 6 is a schematic engine-only power transfer diagram of the hybrid powertrain provided in accordance with an embodiment of the present invention;
FIG. 7 is a schematic engine-only power transfer diagram of another hybrid powertrain provided in accordance with an embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating energy transfer in a dual-motor hybrid drive mode of a hybrid powertrain system provided in accordance with an embodiment of the present invention;
FIG. 9 is a schematic diagram of energy transfer in a single motor hybrid propulsion mode of a hybrid powertrain according to an embodiment of the present invention;
FIG. 10 is a schematic energy transfer diagram illustrating a single-motor hybrid propulsion mode of another hybrid powertrain provided by an embodiment of the present invention;
FIG. 11 is a schematic energy transfer diagram illustrating a single motor hybrid propulsion mode of yet another hybrid powertrain provided in accordance with an embodiment of the present invention;
FIG. 12 is a schematic energy transfer diagram illustrating a single motor hybrid propulsion mode of yet another hybrid powertrain provided by an exemplary embodiment of the present invention;
FIG. 13 is a schematic energy transfer diagram illustrating an energy recovery mode of a hybrid powertrain system provided in accordance with an embodiment of the present invention;
fig. 14 is a schematic diagram of energy transfer in a parking power generation mode of another hybrid power system according to an embodiment of the 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 power system according to an embodiment of the present invention, and as shown in fig. 1, the system includes: the dual-clutch transmission comprises an engine 1, a dual-clutch assembly 2, a first gear train 3, a second gear train 4, a mode switching clutch 5, a first motor 6, a second motor 7, a first main shaft 11, a second main shaft 12 and a power supply assembly 8 for supplying power to the first motor 6 and the second motor 7. An output shaft of the engine 1 is coaxially connected with a first rotating part of the mode switching clutch 5, a second rotating part of the mode switching clutch 5 is in transmission connection with a rotating shaft of the first motor 6, and the rotating shaft of the first motor 6 is connected with the double clutch assembly 2. In the embodiment of the invention, the clutches comprise the second rotating part and the first rotating part, the first rotating part and the second rotating part can rotate relatively when the clutches are disconnected, and the first rotating part and the second rotating part rotate synchronously when the clutches are closed. The second rotating part of the mode switching clutch 5 is arranged on the inner wall of the rotor of the first motor 6, rotates along with the rotor, and the rotor is coaxially connected with the rotating shaft of the first motor 6, so that the transmission connection of the pneumatic clutch 5 and the rotating shaft of the first motor 6 is realized.
The input gear of the first gear train is coaxially connected to the first spindle, the input gear of the second gear train is rotatably fitted to the first spindle, and the output gear of the first gear train and the output gear of the second gear train are coaxially connected to the second spindle. The input gear of the first gear train is coaxially connected with the first spindle, and the input gear of the second gear train is sleeved on the first spindle in a rotatable manner, so that the phenomenon that when any one of the first gear train and the second gear train works and rotates, the other gear train is driven to rotate to generate interference can be avoided.
As shown in fig. 1, the output shaft of the second motor 7 is coaxially connected with the first spindle 11, and the wheel 10 is in transmission connection with the second spindle 12. This enables the second motor 7 to drive the wheels. And completing the multi-motor driving working mode.
In an embodiment of the invention, the dual clutch assembly 2 is adapted to selectively connect at most one of the input gear 31 of the first gear train 3 and the input gear 41 of the second gear train 4 coaxially with the output shaft of the first electric machine 6. That is, the transmission clutch assembly 2 may coaxially connect the input gear 31 of the first gear train 3 with the output shaft of the first electric motor 6, coaxially connect the input gear 41 of the second gear train 4 with the output shaft of the first electric motor 6, or coaxially connect neither the input gear 31 of the first gear train 3 nor the input gear 41 of the second gear train 4 with the output shaft of the first electric motor 6.
The embodiment of the invention provides a hybrid power system which is provided with an engine, a mode switching clutch, a first motor, a second motor, a power supply set, a double clutch assembly, a first gear train and a second gear train. According to the invention, the output shaft of the engine is connected with the mode switching clutch, the mode switching clutch is in transmission connection with the rotating shaft of the first motor, the rotating shaft of the first motor is connected with the double clutch assembly, and the double clutch assembly realizes power transmission with the wheels through the first gear train or the second gear train. Meanwhile, the double-clutch assembly is arranged and used for selectively connecting at most one of the first gear train and the second gear train with the output shaft of the first motor in a coaxial mode, so that the use of speed changing devices such as a gearbox is avoided, and the structure of the hybrid power system is simplified. In addition, the hybrid system can realize multiple working modes of multiple hybrid systems, fully play the roles of the engine, the first motor and the second motor and improve the working efficiency of the hybrid system.
In one implementation of the present invention, as shown in fig. 1, a dual clutch assembly 2 includes: the first clutch 21, the second clutch 22 and the clutch support plate 23, the bottom surface of the clutch support plate 23 is coaxially connected with the rotating shaft of the first motor 6, the second rotating part of the first clutch 21 and the second rotating part of the second clutch 22 are arranged on the inner wall of the clutch support plate 23, the first rotating part of the first clutch 21 is coaxially connected with the first spindle 11, and the first rotating part of the second clutch 22 is connected with the input gear 41 of the second gear train 4. In the embodiment of the present invention, the rotating shaft of the first motor 6 is disposed at the center of the outer bottom surface of the clutch support plate 23, and two clutches, i.e., the first clutch 21 and the second clutch 22, are disposed on the inner wall of the clutch support plate 23 at an interval. The first clutch 21 is used for controlling the connection or disconnection between the input gear 31 of the first gear train 3 and the rotating shaft of the first motor 6, and the second clutch 22 is used for controlling the connection or disconnection between the input gear 41 of the second gear train 4 and the rotating shaft of the first motor 6. In the embodiment of the invention, the transmission ratio of the first gear train 3 and the second gear train 4 is different, so that the vehicle speed can be changed by switching and connecting the first gear train 3 or the second gear train 4. The invention avoids using speed changing devices such as a gearbox and the like, and simplifies the structure of the hybrid power system. And shift gears are switched through the clutch, so that the gear shifting can be smoother without impact.
As shown in fig. 1, the hybrid system further includes a transmission gear train 9, an input gear 91 of the transmission gear train 9 is coaxially connected with the second main shaft 12, and an output gear 92 of the transmission gear train 9 is coaxially connected with the wheel 10. In the embodiment of the invention, the transmission gear train 9 is arranged to transmit the torque of the second main shaft 12 to the wheels 10, so that the transmission of the power is facilitated.
In the embodiment of the present invention, the power supply unit 8 includes: a battery pack, and two inverters, one of which is connected between the battery pack and the first motor 6 and the other of which is connected between the battery pack and the second motor 7. The battery pack is a rechargeable battery pack, and the inverter is arranged on an output circuit of the battery pack and used for converting direct current output by the battery pack into three-phase alternating current and then driving the first motor 6 or the second motor 7. In addition, the two inverters 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, an energy recovery mode or a parking power generation mode, wherein the pure electric mode comprises the following steps: the single-motor pure electric mode and the double-motor pure electric mode, and the hybrid driving mode comprises the following steps: a single motor hybrid driving mode and a dual motor hybrid driving 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. 2, in the single-motor electric-only mode, the engine 1 and the second motor 7 are controlled not to operate, the mode switching clutch 5 is controlled to be off, and the dual clutch assembly 2 is controlled to coaxially connect the input gear 31 of the first gear train 3 and the output shaft of the first motor, thereby controlling the first motor to operate. The power supply assembly 8 supplies power to the first motor 6, so that the first motor 6 drives the wheel 10 to rotate. The pure electric mode is suitable for the working condition that the engine is lack of fuel or runs at low speed. In the single-motor electric-only mode, the engine 1 is not operated, the mode switching clutch 5 is opened, the engine 1 does not output power, the first clutch 21 is closed, the second motor 7 is not operated, and the vehicle is driven to run only by the first motor 6. The power supply assembly 8 discharges, the released electric energy is only supplied to the first motor 6 to work, the first motor 6 converts the electric energy into mechanical energy and transmits the mechanical energy to the mode switching clutch 5 fixedly connected with the first motor 6, the mode switching clutch 5 is connected with the first clutch 21, the first clutch 21 is closed at the moment, the mechanical energy is transmitted to the input gear 31 of the first gear train 3, the output gear of the first gear train 3 is connected with the input gear of the transmission gear train 9 through the second spindle 12, the output gear of the transmission gear train 9 transmits the mechanical energy to the wheel 10, the working mode of independently driving the vehicle under the condition that the first motor 6 is matched with the first gear train 3 is realized, in the embodiment of the invention, the transmission ratios of the first gear train 3 and the second gear train 4 are different, when the first gear train 3 is used for transmitting power, the vehicle is in a first gear state, when the second gear train 4 is used for transmitting power, the vehicle is in a second gear state. Namely, the mode is the working mode of the single-motor driven vehicle when the vehicle is in the first gear state.
Wherein. The first motor 6 can rotate forward or backward, and the vehicle moves forward when rotating forward and backs when rotating backward.
As shown in fig. 3, in the single-motor electric-only mode, the engine 1 and the second motor 7 are controlled not to operate, the mode switching clutch 5 is controlled to be off, and the dual clutch assembly 2 is controlled to coaxially connect the input gear 41 of the second gear train 4 and the output shaft of the first motor, thereby controlling the operation of the first motor. The power supply assembly 8 supplies power to the first motor 6, so that the first motor 6 drives the wheel 10 to rotate. At this time, the first clutch 21 is opened and the second clutch 22 is closed, which enables the first motor 6 to drive the vehicle alone with the vehicle in the second gear state.
As shown in fig. 4, in the single-motor electric-only mode, the engine and the first motor 6 are controlled not to operate, the mode switching clutch 5 is controlled to be off, and the dual clutch assembly 2 is controlled to control the input gear 31 of the first gear train 3 or the input gear 41 of the second gear train 4 not to be coaxially connected with the output shaft of the first motor 6, and the second motor 7 is controlled to operate. The power supply assembly 8 supplies power to the second motor 7, so that the second motor 7 drives the wheel 10 to rotate. In the single-motor electric-only mode, the engine 1 and the first motor 6 are not operated, and the mode switching clutch 5, the first clutch 21, and the second clutch 22 are all disengaged, and at this time, the vehicle is driven to run by only the second motor 7. The power supply assembly 8 discharges, the electric energy released by the power supply assembly is only supplied to the second motor 7 to work, the second motor 7 converts the electric energy into mechanical energy and transmits the mechanical energy to the input gear of the first gear train 3 fixedly connected with the second motor 7, the input gear of the first gear train 3 is meshed with the output gear of the first gear train 3, the output gear of the first gear train 3 is fixedly connected with the input gear of the transmission gear train 9, the mechanical energy is transmitted to the wheels 10, and the working mode that the vehicle is driven by the second motor 7 in the first gear state of the vehicle is realized.
The second motor 7 may be rotated forward or backward, and the vehicle moves forward when rotated forward or backward.
As shown in fig. 5, in the dual-motor electric-only mode, the engine 1 is controlled not to be operated, the mode switching clutch 5 is controlled to be disconnected, the dual clutch assembly 2 is controlled to coaxially connect the input gear 31 of the first gear train 3 with the output shaft of the first motor 1, and the first motor 6 and the second motor 7 are controlled to be operated. The power supply assembly 8 supplies power to the first motor 6 and the second motor 7, so that the first motor 6 and the second motor 7 drive the wheel 10 to rotate. In the dual-motor pure electric mode, the first clutch 21 is closed, and the power supply assembly 8 simultaneously supplies power to the first motor 6, so that the dual-motor pure electric operating mode, as shown in fig. 5, in which the vehicle is driven by the first motor 6 and the second motor 7 in a combined manner can be realized, and in this mode, the vehicle has stronger power.
In some embodiments of the invention, when controlling the hybrid system to switch to the engine-only 1 mode, the method comprises:
as shown in fig. 6, in the engine-only mode 1, the engine 1 is controlled to operate, the first electric machine 6 and the second electric machine 7 are controlled to be not operated, the mode switching clutch 5 is controlled to be closed, and the dual clutch assembly 2 is controlled to coaxially connect the input gear 31 of the first gear train 3 with the output shaft of the first electric machine 6. The engine-only mode is suitable for the working condition that the fuel oil of the engine is sufficient or the vehicle runs at high speed, in the engine-only mode, the engine 1 works, the first electric machine 6 and the second electric machine 7 are driven to be not operated, and the vehicle is driven to start and run only by the power provided by the engine 1. At this time, the mode switching clutch 5 is closed to transmit the power of the engine 1, the first clutch 21 is closed, and the second clutch 22 is opened. The engine 1 outputs mechanical energy, the mechanical energy is transmitted to the mode switching clutch 5, the mode switching clutch 5 is connected with the first clutch 21, the mechanical energy is transmitted to the input gear of the first gear train 3, the output gear of the first gear train 3 is fixedly connected with the input gear of the transmission gear train 9, the mechanical energy is transmitted to the output gear of the transmission gear train 9, the mechanical energy is transmitted to the wheels 10, and the working mode that the vehicle drives the vehicle independently in a first gear state is achieved.
As shown in fig. 7, in the engine only mode, the engine 1 is controlled to operate, the first motor 6 and the second motor 7 are controlled to be not operated, the mode switching clutch 5 is controlled to be closed, and the dual clutch assembly 2 is controlled to coaxially connect the input gear 41 of the second gear train 4 with the output shaft of the first motor 6. In this engine-only 1 mode, when the mode switching clutch 5 is closed to transmit the power of the engine 1, the first clutch 21 is opened, and the second clutch 22 is closed, so that the operating mode in which the vehicle is driven alone in the second gear state is realized.
In another engine only mode of the embodiment of the present invention, the engine 1 is controlled to operate, the mode switching clutch 5 is controlled to close, and the dual clutch assembly 2 is controlled to coaxially connect the input gear 31 of the first gear train 3 or the input gear 41 of the second gear train 4 with the output shaft of the first electric machine 6, so that the engine 1 drives the first electric machine 6 or the second electric machine 7 to generate electricity. In the mode, the power generation function of the first motor 6 or the second motor 7 is started, a part of mechanical energy output by the engine 1 is divided and provided for the first motor 6 and the second motor 7, and the mechanical energy is converted into electric energy by the first motor 6 or the second motor 7 and stored in the power supply assembly 8 for later use.
In some embodiments of the present invention, when controlling the hybrid system to switch to the hybrid drive mode, the method includes:
as shown in fig. 8, in the two-motor hybrid driving mode, the engine 1 is controlled to operate, the mode switching clutch 5 is controlled to be closed, the dual clutch assembly 2 is controlled to coaxially connect the input gear 31 of the first gear train 3 with the output shaft of the first motor 6, and the first motor 6 and the second motor 7 are controlled to operate. The power supply assembly 8 supplies power to the first motor 6 and the second motor 7, so that the engine 1, the first motor 6 and the second motor 7 drive the wheels 10 to rotate together. The driving mode is suitable for the working condition that the automobile needs to output larger power, and under the double-motor hybrid driving mode, the engine 1, the first motor 6 and the second motor 7 work together to jointly drive the automobile to run, so that larger power can be output, and the power of the whole automobile is stronger at the moment. The mode switching clutch 5 and the first clutch 21 are closed, the second clutch 22 is opened, the power supply assembly 8 discharges to the first motor 6 and the second motor 7 simultaneously, the mechanical energy output by the engine 1 and the first motor 6 is transmitted to the first clutch 21 fixedly connected with the mode switching clutch 5, the mechanical energy output by the engine 1 and the first motor 6 is transmitted to the input gear 31 of the first gear train 3, the output gear 32 of the first gear train 3 is connected with the input gear 91 of the transmission gear train 9 through the second spindle 12, the mechanical energy is transmitted to the output gear 92 of the transmission gear train 9, and the mechanical energy is transmitted to the wheels 10, so that the working mode of driving the vehicle under the state that the engine 1, the first motor 6 and the second motor 7 work simultaneously is realized.
As shown in fig. 9, in the single-motor hybrid driving mode, the engine 1 is controlled to operate, the second motor 7 is controlled to be not operated, the mode switching clutch 5 is controlled to be closed, the dual clutch assembly 2 is controlled to coaxially connect the input gear 31 of the first gear train 3 with the output shaft of the first motor 6, and the first motor 7 is controlled to operate. The power supply assembly 8 supplies power to the first motor 6, so that the engine 1 and the first motor 6 drive the wheels 10 to rotate together. In the single-motor hybrid driving mode, the vehicle is driven by the first motor 6 and the engine 1, at the moment, the second motor 7 idles, the hybrid power system can turn off or on the power generation function of the second motor 7 according to requirements, and redundant mechanical energy can be converted into electric energy to be stored in the power supply assembly 8.
As shown in fig. 10, in the single-motor hybrid driving mode, the engine 1 is controlled to operate, the second motor 6 is controlled to be not operated, the mode switching clutch 5 is controlled to be closed, the dual clutch assembly 2 is controlled to coaxially connect the input gear 31 of the first gear train 3 with the output shaft of the second motor 7, and the first motor 6 is controlled to operate. The power supply assembly 8 supplies power to the first motor 6, so that the engine 1 and the first motor 6 drive the wheels 10 to rotate together. In this single-motor hybrid drive mode, the vehicle is driven by the first motor 6 in combination with the engine 1 at this time.
As shown in fig. 11, in the single-motor hybrid drive mode, the engine 1 is controlled to operate, the first motor 6 is controlled not to operate, the mode switching clutch 5 is controlled to be closed, the dual clutch assembly 2 is controlled to coaxially connect the input gear 31 of the first gear train 3 with the output shaft of the first motor 6, and the second motor 7 is controlled to operate. The power supply assembly 8 supplies power to the second motor 7, so that the engine 1 and the second motor 7 jointly drive the wheels 10 to rotate. Under the single-motor hybrid driving mode, the vehicle is driven by the second motor 7 and the engine 1 together, the first motor 6 does not work, the hybrid power system can close or open the power generation function of the first motor 6 according to requirements, and redundant mechanical energy can be converted into electric energy to be stored in the power supply assembly 8.
As shown in fig. 12, in the single-motor hybrid driving mode, the engine 1 is controlled to operate, the mode switching clutch 5 is controlled to be closed, the dual clutch assembly 2 is controlled to connect neither the input gear 31 of the first gear train 3 nor the input gear 41 of the second gear train 4 coaxially with the output shaft of the first motor 6, and the power supply assembly 8 is controlled to supply power to the second motor 7. The power supply assembly 8 supplies power to the second motor 7, so that the second motor 7 drives the wheel 10 to rotate. Under the single-motor hybrid driving mode, the engine 1 does not participate in driving the vehicle to run, can work under the working condition with better fuel economy, transmits mechanical energy to the first motor 6, the first motor 6 converts the mechanical energy into electric energy, one part of the generated electric energy is provided for the second motor 7 to drive the vehicle to run, and the redundant part of the generated electric energy is stored in the power supply assembly 8 for later use. The mode switching clutch 5 is closed, the first clutch 21 and the second clutch 22 are disconnected, mechanical energy output by the engine 1 is transmitted to the first motor 6 through the mode switching clutch 5, the first motor 6 converts the mechanical energy into electric energy, the electric energy is transmitted to the power supply assembly 8 to be converted and distributed, and partial electric energy is transmitted to the second motor 7 by the power supply assembly 8 to be converted into mechanical energy, and the mechanical energy is transmitted to the wheels 10.
In some embodiments of the invention, when controlling the hybrid system to switch to the energy recovery mode, the method comprises:
as shown in fig. 13, the engine 1 and the first electric machine 6 are controlled not to operate, the mode switching clutch 5 is controlled to be off, and the dual clutch assembly 2 is controlled not to connect the input gear 31 of the first gear train 3 or the input gear 41 of the second gear train 4 coaxially with the output shaft of the first electric machine 6. The energy recovery mode is suitable for the working condition that the fuel or the electric quantity stored by the power supply assembly of the vehicle is insufficient. In the energy recovery mode, the wheels 10 provide a counter torque to the vehicle, while part of the kinetic energy of the brake is converted into electrical energy via the second electrical machine 7, which is stored in the power supply assembly 8 for later use. Under the coasting and braking conditions of the vehicle, the engine 1 and the first electric machine 6 are not operated, the mode switching clutch 5, the first clutch 21 and the second clutch 22 are all disconnected, and the second electric machine 7 starts the power generation operation mode. Wherein, a part of kinetic energy reduced by vehicle braking can be converted into mechanical energy through the wheel 10 and transmitted to the output gear of the transmission gear train 9, the input gear of the transmission gear train 9 is connected with the output gear of the first gear train 3 through the second spindle, the first gear train 3 transmits the mechanical energy to the second motor 7, the second motor 7 converts the mechanical energy into electric energy and stores the electric energy into the power supply assembly 8 for standby, and the recovered electric energy can provide energy for the operation of the vehicle, thereby reducing the oil consumption of the vehicle and improving the fuel economy.
In some embodiments of the present invention, when controlling the hybrid system to switch to the parking power generation mode, the method includes:
as shown in fig. 14, the engine 1 is controlled to operate, the second electric machine 7 is controlled to be not operated, the mode switching clutch 5 is controlled to be closed, and the dual clutch assembly 2 is controlled to coaxially connect neither the input gear 31 of the first gear train 3 nor the input gear 41 of the second gear train 4 with the output shaft of the first electric machine 6. The parking power generation mode is suitable for the working condition that the electric quantity stored by the power supply assembly is insufficient. When the battery pack is low in charge, the battery pack can be charged through the parking power generation mode. At this time, the first clutch 21 and the second clutch 22 are disconnected, the second motor 7 does not work, the mode switching clutch 5 is closed, the first motor 6 is driven by the engine 1 after the engine 1 is started, and the mechanical energy transmitted by the engine 1 is converted into electric energy by the first motor 6 and stored in the power supply assembly 8, so that the parking power generation mode is realized.
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 double clutch assembly (2), a first gear train (3), a second gear train (4), a mode switching clutch (5), a first motor (6), a second motor (7), a first main shaft (11), a second main shaft (12) and a power supply assembly (8) for supplying power to the first motor (6) and the second motor (7),
the mode switching clutch (5) comprises a second rotating part and a first rotating part, the output shaft of the engine (1) is coaxially connected with the first rotating part of the mode switching clutch (5), the second rotating part of the mode switching clutch (5) is arranged on the inner wall of the rotor of the first motor (6) and rotates along with the rotor of the first motor (6), the first rotating part of the mode switching clutch (5) and the second rotating part of the mode switching clutch (5) are both positioned in the rotor of the first motor (6), and the rotating shaft of the first motor (6) is connected with the double clutch assembly (2),
the input gear (31) of the first gear train (3) is coaxially connected to the first spindle (11), the input gear (41) of the second gear train (4) is rotatably sleeved on the first spindle (11), the output gear (32) of the first gear train (3) and the output gear (42) of the second gear train (4) are coaxially connected to the second spindle (12),
the output shaft of the second motor (7) is coaxially connected with the first main shaft (11), the second main shaft (12) is in transmission connection with a wheel (10),
the dual clutch assembly (2) for selectively connecting at most one of an input gear (31) of the first gear train (3) and an input gear (41) of the second gear train (4) coaxially with an output shaft of the first electrical machine (6),
the double clutch assembly (2) is further configured to, when the engine (1) is started, connect neither the input gear (31) of the first gear train (3) nor the input gear (41) of the second gear train (4) coaxially with the output shaft of the first electric machine (6) so that the output shaft of the engine (1) is not in driving connection with the wheels (10), the double clutch assembly (2) comprising: first clutch (21), second clutch (22) and clutch supporting disk (23), clutch supporting disk (23) with the pivot coaxial coupling of first motor (6), the second rotation portion of first clutch (21) with the second rotation portion of second clutch (22) sets up the inside of clutch supporting disk (23), the first rotation portion of first clutch (21) with first main shaft (11) coaxial coupling, the first rotation portion of second clutch (22) with input gear (41) coaxial coupling of second gear train (4),
when the hybrid power system starts, a first rotating part and a second rotating part of the mode switching clutch (5) are separated, the first rotating part and the second rotating part of the first clutch (21) are combined or the first rotating part and the second rotating part of the second clutch are combined, and the first motor (6) works to drive the automobile to start;
after starting, the first rotating part and the second rotating part of the mode switching clutch (5) are combined, the first rotating part and the second rotating part of the first clutch (21) are separated, the first rotating part and the second rotating part of the second clutch are separated, and the first motor (6) works to enable the first motor (6) to drive the output shaft of the engine (1) to rotate.
2. Hybrid system according to claim 1, characterized in that it further comprises a transmission gear train (9), the input gear (91) of said transmission gear train (9) being coaxially connected with said second main shaft (12), the output gear (92) of said transmission gear train (9) being coaxially connected with said wheel (10).
3. Hybrid system according to claim 1 or 2, characterized in that said power supply assembly (8) comprises: a battery pack and two inverters, one of which is connected between the battery pack and the first electric machine (6) and the other of which is connected between the battery pack and the second electric machine (7).
4. A control method of a hybrid system for controlling the hybrid system according to any one of claims 1 to 3 to be switched into an electric-only mode, an engine-only mode, a hybrid drive mode, an energy recovery mode, or a parking power generation mode, the electric-only mode including: a single-motor electric-only mode and a dual-motor electric-only mode, the hybrid drive mode comprising: a single motor hybrid driving mode and a dual motor hybrid driving mode.
5. The control method according to claim 4, characterized in that when the hybrid system is controlled to switch to the electric-only mode, the method includes:
controlling the engine and the second motor not to work, controlling the mode switching clutch to be disconnected, controlling the double-clutch assembly to coaxially connect the input gear of the first gear train or the input gear of the second gear train with the output shaft of the first motor, and controlling the first motor to work;
or controlling the engine and the first motor to be out of work, controlling the mode switching clutch to be disconnected, controlling the double-clutch assembly to enable the input gear of the first gear train or the input gear of the second gear train not to be coaxially connected with the output shaft of the first motor, and controlling the second motor to work;
in the double-motor pure electric mode, the engine is controlled not to work, the mode switching clutch is controlled to be disconnected, the double-clutch assembly is controlled to coaxially connect the input gear of the first gear train with the output shaft of the first motor, and the first motor and the second motor are controlled to work.
6. The control method according to claim 4, characterized in that when the hybrid system is controlled to switch to the engine-only mode, the method includes:
controlling the engine to work, controlling the first motor and the second motor to work, controlling the mode switching clutch to be closed, and controlling the double-clutch assembly to coaxially connect the input gear of the first gear train or the input gear of the second gear train with the output shaft of the first motor;
or controlling the engine to work, controlling the mode switching clutch to be closed, and controlling the double-clutch assembly to coaxially connect the input gear of the first gear train or the input gear of the second gear train with the output shaft of the first motor, so that the engine drives the first motor or the second motor to generate power.
7. The control method according to claim 4, characterized in that when the hybrid system is controlled to switch to the hybrid drive mode, the method includes:
in the dual-motor hybrid driving mode, the engine is controlled to work, the mode switching clutch is controlled to be closed, the dual-clutch assembly is controlled to coaxially connect an input gear of the first gear train with an output shaft of the first motor, and the first motor and the second motor are controlled to work;
in the single-motor hybrid driving mode, the engine is controlled to work, the second motor is controlled not to work, the mode switching clutch is controlled to be closed, the double-clutch assembly is controlled to coaxially connect the input gear of the first gear train or the input gear of the second gear train with the output shaft of the first motor, and the first motor is controlled to work;
or, the engine is controlled to work, the first motor is controlled not to work, the mode switching clutch is controlled to be closed, the double-clutch assembly is controlled to coaxially connect the input gear of the first gear train with the output shaft of the first motor, and the second motor is controlled to work;
or, the engine is controlled to work, the mode switching clutch is controlled to be closed, the double-clutch assembly is controlled to enable the input gear of the first gear train or the input gear of the second gear train not to be coaxially connected with the output shaft of the first motor, and the power supply assembly is controlled to supply power to the second motor.
8. The control method according to claim 4, characterized in that when the hybrid system is controlled to be switched to the energy recovery mode, the method includes:
and controlling the engine and the first motor not to work, controlling the mode switching clutch to be disconnected, and controlling the double-clutch assembly to enable the input gear of the first gear train or the input gear of the second gear train not to be coaxially connected with the output shaft of the first motor.
9. The control method according to claim 4, characterized in that when the hybrid system is controlled to switch to the parking power generation mode, the method includes: and controlling the engine to work, controlling the second motor to work, controlling the mode switching clutch to be closed, and controlling the double-clutch assembly to enable the input gear of the first gear train or the input gear of the second gear train not to be coaxially connected with the output shaft of the first motor.
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CN114987189A (en) * 2022-06-10 2022-09-02 中国第一汽车股份有限公司 Dual-motor hybrid power system, control method and vehicle
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