CN113022294A - Single-planet-row type hybrid electric vehicle power coupling mechanism and dynamic coordination control method thereof - Google Patents

Single-planet-row type hybrid electric vehicle power coupling mechanism and dynamic coordination control method thereof Download PDF

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Publication number
CN113022294A
CN113022294A CN202110244120.6A CN202110244120A CN113022294A CN 113022294 A CN113022294 A CN 113022294A CN 202110244120 A CN202110244120 A CN 202110244120A CN 113022294 A CN113022294 A CN 113022294A
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motor
engine
clutch
gear
mode
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施德华
刘盛
沈华平
汪少华
蔡英凤
汪若尘
杨桃
陈龙
李春
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Jiangsu University
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Jiangsu University
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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
    • B60K6/38—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
    • B60K6/22—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
    • B60K6/387—Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/44—Series-parallel type
    • B60K6/442—Series-parallel switching type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • 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
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
    • B60W20/14—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion in conjunction with braking regeneration
    • 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
    • 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
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • 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 single-planet-row type hybrid electric vehicle power coupling mechanism and a dynamic coordination control method thereof, belonging to the field of hybrid electric vehicle structures and control. The mechanism comprises: the device comprises an engine, a planetary gear mechanism, a first motor, a second motor, clutches A and B, brakes A and B, gears A and B and a first transmission shaft and a second transmission shaft; the planetary gear mechanism consists of a sun gear, a planet carrier, a gear ring and a planet gear. The invention enables multiple working modes of the mechanism to meet the complex running condition requirement of the automobile by controlling the combination and the release of each clutch and each brake, thereby improving the working efficiency of the system and the fuel economy; and aiming at the torque fluctuation of the mechanism in the mode switching process, a coordinated control method for reducing the impact degree is disclosed, and the running smoothness of the automobile is improved.

Description

Single-planet-row type hybrid electric vehicle power coupling mechanism and dynamic coordination control method thereof
Technical Field
The invention relates to the technical field of hybrid electric vehicle structures and hybrid electric vehicle control, in particular to a single-planet-row power coupling mechanism and a dynamic coordination control method thereof.
Background
In addition, the development of new energy automobiles is also beneficial to solving the energy safety problem in China and reducing the dependence on imported fuel. However, up to now, the pure electric vehicle is limited in many aspects, for example, the safety of the battery and the energy density are improved, the battery management system is relatively complex, and the cost of the pure electric vehicle is also a factor, and the hybrid electric vehicle can be used as a transition form between the traditional fuel vehicle and the pure electric vehicle, and is worthy of research and development.
As a key technology of a hybrid electric vehicle, there are several common forms of power coupling: series hybrid vehicles, parallel hybrid vehicles, and series-parallel hybrid vehicles. Because the hybrid electric vehicle relates to a plurality of power sources, the power sources need to be coordinated and controlled to realize power output and the impact degree in the running process of the whole vehicle, and a corresponding power coupling mechanism needs to be designed to coordinate the torque and the rotating speed of the power sources. At present, the most common power coupling mechanism realizes the power coupling of a plurality of power sources through a planet row, and can realize multi-gear and multi-mode work through the opening and closing of different power sources and the combination and disconnection of various clutches, thereby effectively improving the fuel economy. The THS power coupling system of Toyota, the hybrid power system of the Richards GS and LS, the ZF series automatic transmission of the German Caifeifu company and the popular 09G 6 automatic transmission all adopt the combination of the planet rows to realize speed change and power coupling, and effectively improve the transmission efficiency of the system. Main vehicle enterprises, component companies, related research institutions and all colleges in China have relatively deep research on the power coupling mechanism of the planet row.
In the process of mode switching of the hybrid electric vehicle, output torque fluctuation is caused by nonlinearity in the process of combining the hysteresis of an engine and the separation of a clutch and a brake, and the fluctuation of the output torque can cause larger impact in the driving process of the whole vehicle. How to coordinate the torque of the power source and how to control the state of the clutch brake is an important research issue.
Disclosure of Invention
The invention aims to provide a hybrid power coupling mechanism, which enables a hybrid power automobile to have multiple driving modes by controlling the combination and the release of a clutch and a brake, and improves the dynamic property and the fuel economy of the hybrid power automobile under different working condition requirements. Meanwhile, a dynamic coordination control scheme is formulated for the designed power coupling mechanism, and the smoothness during mode switching is improved.
The invention solves the technical problem and adopts the technical scheme that the invention is a single planet row type hybrid electric vehicle power coupling mechanism which comprises an engine, a planet gear mechanism, a first motor, a second motor, a clutch A, a clutch B, a brake A, a brake B, a gear A, a gear B, a first transmission shaft and a second transmission shaft; the planetary gear mechanism comprises a sun gear, a planet carrier, a gear ring and a planet gear; the three planet gears with the same structure are uniformly distributed on the circumference with the same distance to the central axis of the planet carrier and are sleeved on the planet carrier in an empty way; the engine is connected with the gear ring through the clutch A, the first transmission shaft and the clutch B; an output shaft of the first motor is directly connected with the sun gear and is locked through a brake B; an output shaft of the second motor is connected with the first transmission shaft through a gear A and a gear B; a sun gear in the planetary gear mechanism is connected with a shell of the power coupling mechanism through a brake B; a gear ring in the planetary gear mechanism is connected with a shell of the power coupling mechanism through a brake A; the first motor comprises a motor rotor A and a motor stator A; the second motor comprises a motor rotor B and a motor stator B; the motor stator A and the motor stator B are fixed on a shell of the power coupling mechanism; the motor rotor A is coaxially and fixedly connected with the sun gear; the motor rotor B is coaxially and fixedly connected with the gear A; the fixed end of the brake A is connected with the device shell, the other end of the brake A is connected with the gear ring, the fixed end of the brake B is connected with the device shell, and the other end of the brake B is connected with the planet carrier sun gear; the gear A is meshed with the gear B, the radius of the gear A is smaller than that of the gear B, and the gear A is coaxially connected with a motor rotor B of the second motor; the clutch A and the clutch B are wet clutches, the brake A and the brake B are dry or wet brakes, and the connection and disconnection of the clutch and the brake are controlled through an electric control hydraulic system; the clutch A and the clutch B are integrated on a first transmission shaft; the gear B is fixed on a first transmission shaft in the clutch A and the clutch B, and a second transmission shaft is connected with the planet carrier and transmits power to a driving wheel or a speed reducer.
Preferably, the clutch A and the clutch B are wet clutches, the brake A and the brake B are dry or wet brakes, and the connection and disconnection of the clutch and the brake are controlled through an electric control hydraulic system;
preferably, the clutch a and the clutch B are integrated on a first transmission shaft; the gear B and the first transmission shaft are of an integrated structure;
the power coupling mechanism of the single-planet-row hybrid electric vehicle designed by the scheme can realize the following modes: the system comprises an electric-only mode 1, an electric-only mode 2, a hybrid mode 1, a hybrid mode 2, a hybrid mode 3, a parking charging mode, a regenerative braking mode 1, a regenerative braking mode 2, an engine driving mode and a driving charging mode;
according to the designed power coupling mechanism of the single-planet-row hybrid electric vehicle, when the vehicle is switched from an electric-only mode to a working mode involving participation of an engine, a dynamic coordination control method comprises the following steps according to the mode switching initial state:
(1) electric-only mode 1 switches to hybrid mode: the method comprises the following steps that a clutch A is combined, a second motor is rapidly started and drives an engine to an idle speed, the engine is ignited and started, a brake A is separated, a clutch B enters a sliding friction state, the clutch is combined when the difference of the rotating speeds of two ends of the clutch B is smaller than a certain numerical value, the second motor compensates the torque of the engine and adjusts the rotating speed of a first transmission shaft in the process, whether the first motor and the second motor still need to work or not is determined according to an energy management strategy after the working state of the engine is stable, the second motor is closed without working, the first motor does not need to be closed when the first motor works, and the brake B is combined at the same time, so that the mode switching;
(2) electric-only mode 2 switches to hybrid mode: when the clutch A drives the engine to an idle speed through sliding friction, the engine is ignited and started, and the difference of the rotating speeds of two ends of the clutch A is smaller than a certain value, the clutch A and the second motor are combined to compensate the torque of the engine and adjust the rotating speed of the first transmission shaft, after the engine is in a stable state, whether the first motor and the second motor still need to work is determined according to an energy management strategy, the second motor is closed without working, the first motor does not need to be closed when the first motor works, and the brake B is combined when the first motor needs to be closed, so that the mode switching process is completed;
(3) electric only mode 1 switches to engine drive mode: the clutch A is combined, the second motor is quickly started and drives the engine to idle speed, the engine is ignited and started, the brake A is separated, the clutch B enters a friction sliding state, the clutch B is combined when the difference of the rotating speeds of two ends of the clutch B is smaller than a certain numerical value, the second motor compensates the torque of the engine and adjusts the rotating speed of the first transmission shaft, the first motor and the second motor are closed after the working state of the engine is stable, the brake B is combined until the starting process of the engine is finished, and the automobile enters an engine driving mode;
(4) switching from the pure electric mode 2 to an engine driving mode: and the clutch A rubs, and the second motor outputs power to drive the engine to rapidly reach the idling speed and ignite for starting. After the engine reaches the idle speed, the clutch A is combined, the first motor and the second motor stop working after the working state of the engine is stable, the brake B is locked, the starting process of the engine is finished, and the automobile enters an engine driving mode;
(5) the pure electric mode 1 is switched to a driving charging mode: the process is firstly directly combined with the clutch A, and the second motor is used for providing power to quickly start the engine. When the engine speed is driven to the idling speed and the ignition is started, the brake A is disconnected, the clutch B enters a friction sliding stage, when the rotating speed of the clutch B main driving disc and the rotating speed of the clutch B main driving disc are smaller than a small value, the clutch B is combined, and after the engine working state is stable, the engine further provides torque to enable the second motor to rotate reversely, so that power generation is achieved.
The invention can realize the input of different power sources and the stepless speed change function by independently controlling each clutch and brake, and the engine can work in a high-efficiency region according to the driving requirement of the automobile. For example, when the engine is driven, the engine can directly drive wheels by disconnecting the brake A, connecting the brake B, connecting the clutch A and the clutch B, and when the second motor works together with the engine, the rotating speed and the torque of the engine can be compensated, so that the engine can work in a high-efficiency region. The torque insufficiency in the mode switching process is compensated by coordinately controlling the torque and the rotating speed of the motor and the engine, so the invention has the following advantages:
1) the working mode is various: aiming at different working conditions, various pure electric modes and various hybrid power modes are realized by controlling the three power sources, the brake and the clutch.
2) Under the mode of motor independent drive, engine independent drive or the combination drive of the motor and the engine, the power coupling mechanism can have better dynamic property and economy by controlling the clutch and the brake, thereby avoiding the engine working in an inefficient interval and reducing the capacity requirement on the motor.
3) The power compensation of the motor to the engine can be realized, and the working efficiency of the engine is improved.
4) According to the braking force requirement when the automobile is braked, the power coupling mechanism works in a braking energy recovery mode, and the energy utilization efficiency of the system is improved.
5) The engine torque can be compensated in the mode switching process by compensating the engine torque through the motors, and the torque and the rotating speed are respectively compensated by coordinating the two motors, so that the running smoothness of the automobile is improved, and the impact is reduced.
Drawings
FIG. 1 is a structural diagram of a single planetary row type power coupling mechanism;
FIG. 2 is a power transmission route diagram of electric-only mode 1;
FIG. 3 is a pure electric mode 2 power transmission route diagram;
FIG. 4 is a hybrid mode 1 power transmission route diagram;
FIG. 5 is a hybrid mode 2 power transmission route diagram;
FIG. 6 is a hybrid mode 3 power transmission route diagram;
fig. 7 is a diagram of a parking charge mode power transmission route;
fig. 8 is a power transmission route map of the regenerative braking mode 1;
fig. 9 is a power transmission route map of the regenerative braking mode 2;
fig. 10 is a diagram of an engine drive mode power transmission route;
FIG. 11 is a power transmission route diagram for a charging mode of driving;
FIG. 12 is a diagram of mode switch control logic.
In the figure: 1-first electric machine, 2-sun gear, 3-brake a, 4-ring gear, 5-gear a, 6-second electric machine, 7-engine, 8-clutch a, 9-first transmission shaft, 10-gear B, 11-clutch B, 12-planet carrier, 13-brake B, 14-second transmission shaft.
Detailed Description
The invention is illustrated by the accompanying drawings and the detailed description. The functions and advantages of the present invention will be understood by those skilled in the relevant art from the description of the present specification, and the following description is a description of some of the key points of the present invention and should not be construed as an exhaustive design of the present invention.
Referring now to FIG. 1, wherein reference numerals 1-14 represent: the hybrid power transmission comprises a first motor 1, a sun gear 2, a brake A3, a ring gear 4, a gear A5, a second motor 6, an engine 7, a clutch A8, a first transmission shaft 9, a gear B10, a clutch B11, a planet carrier 12, a brake B13 and a second transmission shaft 14.
The invention designs a single-planet-row power coupling mechanism, wherein a planet gear mechanism comprises a sun gear, a planet carrier, a gear ring and a planet gear; the rotor of the first motor 1 is connected with the sun gear 2 of the planetary gear mechanism through an output shaft, so that the input and the output of power are realized; the rotor of the second motor 6 is connected with the gear A5 through an output shaft, further connected with the first transmission shaft 9 through the gear B10, and further transmits power through the gear ring 4; the engine 7 is connected to the clutch A8 via an output shaft, and further connected to the ring gear 4 of the planetary gear mechanism via the first transmission shaft 9 and the clutch B11, thereby realizing power output.
Through the technical scheme description, the brake A3 and the brake B13 are dry or wet brakes, and the clutch A8 and the clutch B11 are wet clutches; the three power sources are coaxially arranged, so that the axial size of the power coupling mechanism is reduced.
When the automobile works in a pure electric mode, the automobile can be driven by the first motor 1 alone or by the combination of the two motors; when the automobile works in a hybrid power mode, two motors can be respectively and independently driven by the engine 7 in a combined manner, and three power sources can be driven simultaneously; when regenerative braking is carried out, the first motor 1 reversely rotates to generate electricity, and energy recovery is realized; when the automobile works in a driving charging mode, the engine 7 drives the second motor 6 to reversely rotate to generate electricity, so that the electric quantity of the battery is kept within a specified range. Due to the design scheme of the double motors, even if one motor fails, the automobile can also realize a pure electric mode, a hybrid power mode and a braking energy recovery mode.
The states of the clutches and brakes in the different modes are listed below by table 1:
Figure BDA0002963436910000051
● denotes a clutch or brake engagement,
Figure BDA0002963436910000052
indicating that the clutch or brake is disconnected;
the specific mode of operation of the invention is described below with reference to figures 2-11:
1. pure electric mode 1:
in the mode, the automobile is driven to run by only the first motor 1 alone, the brake B13 is disconnected by combining the brake A3 and the two clutches, the first motor 1 realizes torque and rotating speed transmission through the planetary gear train, the automobile starts to run mainly, the automobile runs under the urban idle working condition, the engine can be prevented from working in a low-efficiency region, and the fuel economy of the automobile is improved, and the power transmission route of the mode refers to the attached figure 2.
2. Electric-only mode 2:
in the mode, the first motor 1 and the second motor 6 jointly drive the automobile to run, other clutches and brakes are disconnected by combining the clutch B11, the first motor 1 and the second motor 6 realize torque and rotating speed transmission through a planet row, the automobile mainly works in automobile starting, city idling working conditions, abrupt slope starting and running under the condition that the automobile needs to be accelerated in a pure electric mode, the engine can be prevented from working in an inefficient region, the fuel economy of the automobile is improved, and a power transmission route in the mode refers to the attached figure 3.
3. Hybrid mode 1:
in the mode, the second motor 6 and the engine 7 jointly drive the automobile to run, the brake A3 is separated, and the second motor 6 is combined with other clutches and brakes, so that the engine speed is dragged by the second motor 6 through the clutch A8 to quickly reach the idle speed, the smoothness and the fuel economy of the automobile when the engine is started are improved, and the power interruption is avoided. Mainly works in a high-speed cruising mode and a combined driving mode when the first motor 1 fails, and the second motor 6 compensates the torque of the engine to ensure that the engine works in a high-efficiency region, and the power transmission route of the mode refers to the attached figure 4.
4. Hybrid mode 2:
in this mode, the first electric machine 1 and the engine jointly drive the vehicle to run, and two brakes are separated and two clutches are combined. The first electric machine 1 transmits torque and regulates the rotational speed via the sun gear 2. The engine mainly works in a high-speed cruising mode, so that the engine works in an ideal rotating speed range, and a power transmission route of the mode refers to the attached figure 5.
5. Hybrid mode 3:
in the mode, the automobile is driven by three power sources in a combined mode, the two brakes are separated, the two clutches are combined, the second motor 6 drags the rotating speed of the engine to quickly reach the idling rotating speed through the clutch A8, the smoothness and the fuel economy of the automobile when the engine is started are improved, and the power interruption is avoided; the first electric machine 1 transmits torque and regulates the rotational speed via the sun gear 2. Mainly used in the high-speed cruising mode, the second electric machine 6 compensates the torque of the engine to make the engine work in the high-efficiency region, and the power transmission route of the mode refers to the attached figure 6.
6. Parking charging mode:
in this mode, the engine is started and torque is transferred by engaging clutch A8, and engaging brake A3, disengaging clutch B11 and brake B13. The engine 7 drives the second motor 6 to rotate reversely to realize power generation. The method is mainly used for converting mechanical energy into electric energy by using an engine and a motor when an automobile stops and the SOC of a battery is lower than a specified value, so that the battery keeps a certain electric quantity, and a power transmission route in the mode refers to the attached figure 7.
7. Regenerative braking mode 1:
in the mode, the automobile needs to be decelerated, the brake A3 and the two clutches are combined, the brake B13 is disconnected, the first motor 1 is driven to rotate reversely by the rotation of the wheels to realize power generation, and a braking effect is achieved on a transmission system. This mode requires a battery SOC less than 1 and combined braking by mechanical braking if rapid deceleration is required, see fig. 8 for power transmission routes.
8. Regenerative braking mode 2:
in the mode, the automobile needs to be decelerated, the clutch A8 and the brake A3 are disconnected by combining the brake B13 and the clutch B11, and the second motor 6 is driven to rotate reversely by utilizing the rotation of wheels to realize power generation, so that a transmission system is braked. This mode requires a SOC value of the battery less than 1 and is a second option for recovering braking energy when the first electric machine 1 fails, and if a sudden deceleration is required, combined braking is performed by mechanical braking, and the power transmission route in this mode is shown in fig. 9.
9. An engine drive mode:
in this mode, the torque-rotation speed demand of the vehicle is just an efficient operating region of the engine 7, and the battery SOC is in an ideal region. The engine is driven by disengaging brake a3, combining with the other clutches and brakes, and turning off both motors. This mode is primarily for mid-high cruise mode, and the power transmission path is shown in FIG. 10.
10. The driving charging mode is as follows:
in the mode, the automobile works under the working condition that the SOC of the battery is less than the specified value and the requirement of the automobile for running is not high. By combining the two clutches, the two brakes are disconnected, the engine 7 drives the second motor 6 to rotate reversely to generate power, so that the SOC of the battery is kept in an ideal interval, the first motor 1 and the engine 7 provide power for the running of the automobile, and the automobile can run normally, and the power transmission route in the mode refers to the attached drawing 11.
Aiming at the delayed reaction when the engine is started in the mode switching process, the second motor 6 is required to compensate the insufficient torque of the engine 7, and the first motor 1 is coordinated, so that the rotating speed and the torque of the first motor 1 can meet the automobile requirement, the fluctuation of the transmission torque is reduced, and the running smoothness of the automobile is improved.
Referring to fig. 12, the mode switching control logic is described as follows:
when the pure electric mode is switched to the hybrid power mode:
when the pure electric mode 1 is switched to the hybrid power mode:
the clutch A8 is directly combined firstly, the second electric machine 6 is used to quickly start the output power, and the rotation speed and the torque output by the second electric machine 6 are reduced by the gear A5 and the gear B10 so as to quickly start the engine 7. When the rotating speed of the engine 7 is driven to the idling rotating speed for ignition starting, the brake A3 is disconnected, the clutch B11 enters a slipping stage, and when the rotating speed of the clutch B11 of a main driving disc is smaller than a small value, the clutch B11 is combined, and the rotating speed of the engine is subjected to PI control adjustment through the second motor 6 before the engine 7 reaches the stable rotating speed, so that the engine reaches the stable rotating speed as soon as possible.
If the target mode is the hybrid mode 1, when the engine 7 reaches a stable working rotating speed, the first motor 1 is turned off, meanwhile, the brake B13 is combined, the hybrid mode 1 is driven by the second motor 6 and the engine 7 in a combined mode, the second motor 6 is utilized to compensate the engine torque, and the engine 7 can work in a high-efficiency region while the driving requirement of the automobile is met; if the target mode is the hybrid power mode 2, when the engine 7 reaches the stable working rotating speed, the second motor 6 is turned off, the hybrid power mode 2 is driven by the first motor 1 and the engine 7 in a combined mode, the speed of the first motor 1 is regulated, torque is provided, and the engine 7 works in a high-efficiency interval; if switching to hybrid mode 3, the three power sources are working simultaneously and still speed regulated and providing torque by the first electric machine 1, the second electric machine 6 compensates the engine torque. In the mode switching process, the motor 1 needs to meet the torque requirement of automobile running, the speed is regulated through the first motor 1, and the power can meet the required speed through the planet row mechanism.
When the pure electric mode 2 is switched to the hybrid power mode:
firstly, slipping is needed through the clutch A8, the rotational speed of the engine 7 is driven by the output power of the second motor 6 to rapidly reach the idle rotational speed, and ignition is started, and the torque and the rotational speed output by the second motor 6 can meet the torque and rotational speed relationship of the planet row when the automobile runs through the gear A5 and the gear B10. After the engine 7 reaches idle speed, clutch A8 is engaged. The second motor 6 is used for PI control to regulate the rotating speed of the engine before the engine reaches the stable rotating speed so that the engine reaches the stable rotating speed as soon as possible,
if the target mode is the hybrid mode 1, when the engine 7 reaches a stable working rotating speed, the first motor 1 is turned off, meanwhile, the brake B13 is combined, the hybrid mode 1 is driven by the second motor 6 and the engine 7 in a combined mode, the second motor 6 is utilized to compensate the engine torque, and the engine 7 can work in a high-efficiency region while the driving requirement of the automobile is met; if the target mode is the hybrid power mode 2, when the engine 7 reaches the stable working rotating speed, the second motor 6 is turned off, the hybrid power mode 2 is driven by the first motor 1 and the engine in a combined mode, the speed of the first motor 1 is regulated, torque is provided, and the engine 7 works in a high-efficiency range; if switched to hybrid mode 3, the three power sources are operating simultaneously and still are governed by the first electric machine 1 and providing torque, and the second electric machine compensates for the engine 7 torque. In the mode switching process, the motor 1 needs to meet the torque requirement of automobile running, the speed is regulated through the motor 1, and the power can meet the required speed through the planet row mechanism. In the mode switching process, the first motor 1 needs to meet the torque requirement of automobile running, the speed is regulated through the first motor 1, and the power can meet the required speed through the planet row mechanism.
When the pure electric mode is switched to the driving charging mode:
when the battery power is insufficient, a pure electric mode that two motors are driven simultaneously does not occur, so the process can only be switched from the pure electric mode 1 to a driving charging mode. The process is directly combined with the clutch A8 to use the second motor 6 to provide power to rapidly start the engine 7, and the mode switching process ensures that the rotational speed of the second motor 6 is reduced through the gear A5 and the gear B10 to rapidly start the engine 7. When the rotating speed of the engine 7 is driven to the idling rotating speed and the ignition is started, the brake A3 is switched off, the clutch B11 enters a friction sliding stage, and when the rotating speed of the clutch B11 of a driving disc and a driven disc is smaller than a small value, the clutch B11 is combined, the rotating speed of the engine is subjected to PI control adjustment through the second motor 6, so that the engine reaches a stable rotating speed as soon as possible, and the working state of the engine 7 is stable. Further, the torque supplied from the engine 7 causes the second electric machine 6 to rotate in reverse, thereby generating electric power. In the process, the first motor 1 needs to regulate the speed so that the rotating speed output by the planet row can meet the driving requirement, and simultaneously, the torque output by the first motor 1 also meets the driving requirement. The driving charging mode can keep the engine 7 in an efficient operation range, and redundant mechanical energy is converted into electric energy through the second motor 6 and stored in the battery.
When the pure electric mode is switched to the engine driving mode:
when the pure electric mode 1 is switched to the engine driving mode:
the clutch A8 is directly combined to utilize the second motor 6 to quickly start the output power, and the rotation speed and the torque output by the second motor 6 are reduced by the gear A5 and the gear B10 to enable the engine 7 to quickly start. When the rotating speed of the engine 7 is driven to the idling rotating speed for ignition starting, the brake A3 is disconnected, the clutch B11 enters a friction sliding stage, when the rotating speed of the clutch B11 of a driving disc and a driven disc is smaller than a small value, the clutch B11 is combined, the rotating speed of the engine is regulated through PI control of the second motor 6 before the engine 7 reaches the stable rotating speed, the engine 7 reaches the stable rotating speed as soon as possible, after the working state of the engine 7 is stable, the first motor 1 and the second motor 6 stop working, the brake B13 is locked, and the mode switching process is finished. In the mode switching process, the first motor 1 needs to meet the torque requirement of automobile running, the speed is regulated through the first motor 1, and the power can meet the required speed through the planet row mechanism.
When the pure electric mode 2 is switched to the engine driving mode:
firstly, slipping is needed through the clutch A8, the rotational speed of the engine 7 is driven by the output power of the second motor 6 to rapidly reach the idle rotational speed, and ignition is started, and the torque and the rotational speed output by the second motor 6 can meet the torque and rotational speed relation of the planetary row through the gear A5 and the gear B10. After the engine 7 reaches the idle speed, the clutch A8 is combined, the engine speed is regulated through the second motor 6 by PI control before the engine 7 reaches the stable speed, so that the engine 7 reaches the stable speed as soon as possible, after the working state of the engine 7 is stable, the first motor 1 and the second motor 6 stop working, the brake B13 is locked, and the mode switching process is completed. In the mode switching process, the first motor 1 needs to meet the torque requirement of automobile running, the speed is regulated through the first motor 1, and the power can meet the required speed through the planet row mechanism.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (6)

1. A single planet row type hybrid electric vehicle power coupling mechanism is characterized by comprising an engine (7), a planet gear mechanism, a first motor (1), a second motor (6), a clutch A (8), a clutch B (11), a brake A (3), a brake B (13), a gear A (5) and a gear B (10);
an output shaft of the engine (7) is connected with a gear ring of the planet carrier sequentially through a clutch A (8), a first transmission shaft (9) and a clutch B (11); the planetary gear mechanism comprises a sun gear (2), a planet carrier (12), a gear ring (4) and a planet gear; the three planet gears with the same structure are uniformly distributed on the circumference with the same distance to the central axis of the planet carrier (12) and are sleeved on the planet carrier (12) in an empty way; a sun gear (2) in the planetary gear mechanism is connected with a shell of the power coupling mechanism through a brake B (13); a gear ring (4) in the planetary gear mechanism is connected with a shell of the power coupling mechanism through a brake A (3); the first motor (1) comprises a motor rotor A and a motor stator A; the second motor (6) comprises a motor rotor B and a motor stator B; the motor rotor A is coaxially and fixedly connected with the sun gear (2); the motor rotor B is coaxially and fixedly connected with the gear A (5); the brake A (3) is connected with the gear ring (4); the brake B (13) is connected with the planet carrier sun gear (2); the gear A (5) is meshed with the gear B (10), and the radius of the gear A (5) is smaller than that of the gear B (10); the gear A (5) is coaxially connected with a motor rotor B of the second motor (6); the gear B (10) is fixed on a first transmission shaft (9) between the clutch A (8) and the clutch B (11), and a second transmission shaft (14) is connected with the planet carrier and transmits power to the speed reducer or the speed reducing mechanism.
2. A single planetary row hybrid vehicle coupling as claimed in claim 1, wherein the clutch a (8) and the clutch B (11) are wet clutches, the brake a (3) and the brake B (13) are dry or wet brakes, and the engagement and disengagement of the clutches and the brakes are controlled by an electrically controlled hydraulic system.
3. A single planetary row hybrid vehicle coupling according to claim 1, wherein the clutch a (8) and the clutch B (11) are integrated on the first transmission shaft (9).
4. A single planetary row hybrid vehicle coupling as claimed in claim 1, wherein the gear B (10) is of one-piece construction with the first drive shaft (9).
5. The power coupling mechanism of a single planetary row hybrid electric vehicle according to claim 1, wherein the motor stator a and the motor stator B are fixed on a housing of the power coupling mechanism; stopper A (3) stiff end is connected with the device casing, stopper B (13) stiff end is connected with the device casing.
6. A method for controlling the dynamic coordination of the power coupling mechanism of a single planetary row hybrid electric vehicle according to any one of claims 1 to 5, characterized in that the method comprises:
1) electric-only mode 1 switches to hybrid mode: the method comprises the following steps that a clutch A (8) is combined, a second motor (6) is rapidly started and drives an engine to an idle speed, an engine (7) is ignited and started, a brake A (3) is separated, a clutch B (11) enters a sliding friction state, the clutch is combined when the speed difference between two ends of the clutch B (11) is smaller than a certain value, the second motor (6) compensates the torque of the engine and adjusts the speed of a first transmission shaft (9) in the process, whether the first motor (1) and the second motor (6) need to work or not is determined according to an energy management strategy after the working state of the engine is stable, the second motor (6) is closed without working, and the brake B (13) is combined when the first motor (1) needs to be closed without working;
2) electric-only mode 2 switches to hybrid mode: when the clutch A (8) drives the engine (7) to an idle speed through sliding friction, the engine (7) is ignited and started, and the difference of the rotating speeds of the two ends of the clutch A (8) is smaller than a certain value, the clutch A (8) and the second motor (6) are combined to compensate the engine torque and adjust the rotating speed of the first transmission shaft (9), after the engine (7) is stable in state, whether the first motor (1) and the second motor (6) still need to work is determined according to an energy management strategy, the second motor (6) is closed without working, and the first motor (1) does not need to be closed when working, and the brake B (13) is combined;
3) electric only mode 1 switches to engine drive mode: the clutch A (8) is combined, the second motor (6) is quickly started and drives the engine (7) to idle speed, the engine (7) is ignited and started, the brake A (3) is separated, the clutch B (11) enters a friction state, the second motor (6) is combined when the speed difference between the two ends of the clutch B (11) is smaller than a certain value, the second motor (6) compensates the torque of the engine and adjusts the speed of the first transmission shaft (9), the first motor (1) and the second motor (6) are closed after the working state of the engine (7) is stable, and the brake B (13) is combined;
4) switching from the pure electric mode 2 to an engine driving mode: the clutch A (8) is used for friction sliding, the second motor (6) is used for outputting power to drive the engine to rapidly reach the idling speed and start ignition, after the engine (7) reaches the idling speed, the clutch A (8) is combined, after the working state of the engine (7) is stable, the first motor (1) and the second motor (6) stop working, and the brake B (13) is locked;
5) the pure electric mode 1 is switched to a driving charging mode: the process includes the steps that firstly, the clutch A (8) is directly combined, the second motor (6) is used for providing power to enable the engine (7) to be started quickly, when the engine is driven to the idling speed and ignited to start, the brake A (3) is disconnected, the clutch B (11) enters a friction sliding stage, when the rotating speed of the clutch B (11) and the rotating speed of the driving disc of the driving.
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