CN111619331B - Hybrid powertrain system and control method - Google Patents

Hybrid powertrain system and control method Download PDF

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Publication number
CN111619331B
CN111619331B CN202010451473.9A CN202010451473A CN111619331B CN 111619331 B CN111619331 B CN 111619331B CN 202010451473 A CN202010451473 A CN 202010451473A CN 111619331 B CN111619331 B CN 111619331B
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clutch
controlled
motor
brake
controlling
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CN111619331A (en
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张恒先
耿丽珍
顾存行
李亚南
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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
    • B60K6/36—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
    • B60K6/22—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
    • B60K2006/381—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 characterized by driveline brakes

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

Abstract

The present disclosure provides a hybrid power system and control method, comprising an engine, a main shaft, a first clutch, a second clutch, a third clutch, a fourth clutch, a first planetary gear train, the output shaft of the engine is coaxially connected with the spindle, the rotor of the first motor is coaxially connected with the spindle, the first connecting cylinder is connected with the first planet carrier and the second gear ring, the second connecting cylinder is connected with the first gear ring and the second planet carrier, the first planet carrier is in transmission connection with the wheel, the first clutch is connected with the spindle and the first central wheel, the second clutch is connected with the spindle and the second planet carrier, the third clutch is connected with the spindle and the second central wheel, the fourth clutch is located on the second connecting cylinder, the first brake can brake the first gear ring, and the second brake can brake the second central wheel. The multi-gear switching method and the multi-gear switching device can realize multi-gear switching of the hybrid power system and enhance the adaptability of the system.

Description

Hybrid powertrain system and control method
Technical Field
The disclosure relates to the technical field of automobiles, in particular to a hybrid power system and a control method.
Background
Vehicles, as a fast-paced, efficient means of transportation in life, have increased in number year after year in recent years. Most of traditional vehicles use fossil fuels (such as gasoline, diesel oil and the like) to provide power for engines, and exhaust tail gas of the traditional vehicles can pollute the environment and does not meet the requirements of energy conservation and environmental protection. Therefore, there is a need to power vehicles using new energy sources (e.g., electrical energy) without pollution instead of fossil fuels. At present, a hybrid electric vehicle adopting new energy and fossil fuel as energy is provided, and the hybrid electric vehicle can greatly improve the dynamic property and the fuel economy of the whole vehicle and reduce the emission.
The transmission mechanism in the hybrid system of the hybrid vehicle in the related art is generally a transmission, and the transmission generally includes a manual transmission and an automatic transmission. The manual gearbox adopts a synchronizer to switch power to different gear trains, and gear shifting is completed to realize speed change; most of automatic gearboxes are planetary gear trains, and gear shifting is realized by restraining different parts in the planetary gear trains.
However, in the related art, to realize multi-gear shifting, multiple sets of gear trains need to be arranged in the manual transmission, which undoubtedly increases the space occupation ratio of the hybrid power system; for an automatic transmission, a power source is usually fixedly connected with a certain component in a planetary gear train, and when the certain component is used as a driving component in the planetary gear train, at most two gears can be changed, but multi-gear (for example, 4 gears) cannot be switched. Therefore, the hybrid power system in the related art has poor adaptability of switching different gears according to different working condition requirements, so that the working efficiency of the power source is low.
Disclosure of Invention
The embodiment of the disclosure provides a hybrid power system and a control method, which can realize the switching of 4 gears of the hybrid power system according to different working condition requirements, enhance the adaptability of the hybrid power system and improve the working efficiency of a power source. The technical scheme is as follows:
an embodiment of the present disclosure provides a hybrid system, including: the hybrid system includes: engine, main shaft, first clutch, second clutch, third clutch, one way clutch, first planetary gear train, second planetary gear train, first connecting cylinder, second connecting cylinder, first stopper, second stopper, first motor and power supply unit spare, the output shaft of engine with main shaft coaxial coupling, the rotor of first motor with main shaft coaxial coupling, first planetary gear train includes: first centre wheel, first star gear, first planet carrier and first ring gear, first centre wheel suit is in on the main shaft, first centre wheel with main shaft clearance fit, first centre wheel is located in the first ring gear, first star gear sets up first centre wheel with between the first ring gear and with first centre wheel with first ring gear meshing, first star gear rotationally sets up on the first planet carrier, first planet carrier is connected with wheel drive, the second planetary gear train includes: the first clutch, the second clutch and the third clutch respectively comprise a driving part and a driven part, the driving part of the first clutch is connected with the main shaft, the driven part of first clutch with first centre wheel is connected, the initiative portion of second clutch with the main shaft is connected, the driven part of second clutch with the second planet carrier is connected, the initiative portion of third clutch with the main shaft is connected, the driven part of third clutch with the second centre wheel is connected, one way clutch is located on the second connecting cylinder, first stopper is used for the braking first ring gear, the second stopper is used for the braking the second centre wheel, the power supply subassembly with first motor is connected.
In an implementation manner of the embodiment of the present disclosure, the hybrid system further includes a second motor and a fourth clutch, a rotor of the second motor is coaxially connected to the main shaft, the second motor is located between the engine and the first motor, the first clutch is mounted on the main shaft, and the fourth clutch is located between the first motor and the second motor.
In another implementation of the disclosed embodiment, the power supply assembly includes: the electric vehicle further includes a battery and two inverters, one of the two inverters being connected between the battery and the first motor, and the other of the two inverters being connected between the battery and the second motor.
The disclosed embodiment provides a control method of a hybrid system, which is used for controlling the hybrid system, and comprises the following steps: and controlling the hybrid power system to operate in any one of power modes, wherein the power modes comprise a pure electric mode, a pure engine mode, a hybrid driving mode, an energy recovery mode and a parking power generation mode.
In another implementation manner of the embodiment of the present disclosure, the hybrid system further includes a second motor and a fourth clutch, a rotor of the second motor is coaxially connected to the main shaft, the second motor is located between the engine and the first motor, the first clutch is mounted on the main shaft, and the fourth clutch is located between the first motor and the second motor.
In one implementation manner of the embodiment of the present disclosure, when the hybrid power system is in the electric-only mode, the engine-only mode, the hybrid driving mode, or the energy recovery mode, the hybrid power system is controlled to operate in any one of power gears, where the power gears include: the control method comprises the following steps of: when the hybrid power systems are controlled to be switched to the first gear, the first clutch is controlled to be in a combined state, the second clutch and the third clutch are controlled to be in a separated state, the first brake is controlled to brake, and the second brake is controlled not to brake; when the hybrid power systems are controlled to be switched to the second gear, the first clutch is controlled to be in a combined state, the second clutch and the third clutch are controlled to be in a separated state, the first brake is controlled not to brake, and the second brake is controlled to brake; when the hybrid power systems are controlled to be switched to the third gear, the first clutch and the second clutch are controlled to be in a combined state, the third clutch is controlled to be in a separated state, and the first brake and the second brake are controlled not to brake; when the hybrid power systems are controlled to be switched to the fourth gear, the first clutch and the third clutch are controlled to be in a separated state, the second clutch is controlled to be in a combined state, the first brake is controlled not to brake, and the second brake is controlled to brake; and when the hybrid power system is controlled to be switched to the reverse gear, the first clutch and the second clutch are controlled to be in a separation state, the third clutch is controlled to be in a combination state, the first brake is controlled to brake, and the second brake is controlled not to brake.
In another implementation manner of the embodiment of the present disclosure, when the hybrid power system is controlled to be switched to the electric-only mode, the control method includes: controlling the engine and the second motor not to work, controlling the fourth clutch to be in a separation state, and controlling the first motor to work; or controlling the engine and the first motor not to work, controlling the fourth clutch to be in a combined state, and controlling the second motor to work.
In another implementation manner of the embodiment of the present disclosure, when the hybrid system is controlled to be switched to the engine-only mode, the control method includes: and controlling the first motor and the second motor not to work, controlling the fourth clutch to be in a combined state, and controlling the engine to work.
In another implementation manner of the embodiment of the present disclosure, when the hybrid system is controlled to switch to the hybrid driving mode, the control method includes: controlling the first motor, the second motor and the engine to work, and controlling the fourth clutch to be in a combined state; or the first motor and the engine are controlled to work, the fourth clutch is controlled to be in a combined state, and the second motor is controlled not to work; or the second motor and the engine are controlled to work, the fourth clutch is controlled to be in a combined state, and the first motor is controlled not to work; or controlling the engine to work, controlling the fourth clutch to be in a combined state, and controlling the engine to drive the first motor to generate power; or controlling the engine to work, controlling the fourth clutch to be in a combined state, and controlling the engine to drive the second motor to generate power.
In another implementation manner of the embodiment of the present disclosure, when the hybrid power system is controlled to be switched to the energy recovery mode, the control method includes: and controlling the engine and the second motor not to work, controlling the fourth clutch to be in a separation state, and controlling the first motor to generate power.
In another implementation manner of the embodiment of the present disclosure, when the hybrid system is controlled to be switched to the parking power generation mode, the control method includes: controlling the engine to work, controlling the first motor to stop working, controlling the fourth clutch to be in a separation state, and controlling the engine to drive the second motor to generate power; or controlling the engine to work, controlling the second motor to stop working, controlling the fourth clutch to be in a combined state, controlling the first clutch to be in a separated state, and controlling the engine to drive the first motor to generate power.
The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:
the hybrid power system comprises two planetary gear trains which are arranged at intervals, wherein one end of a first connecting cylinder is coaxially and fixedly connected with a first planet carrier, the other end of the first connecting cylinder is coaxially and fixedly connected with a second gear ring, one end of a second connecting cylinder is coaxially and fixedly connected with the first gear ring, and the other end of the second connecting cylinder is coaxially and fixedly connected with a second planet carrier. The first connecting cylinder is connected with the first planet carrier and the second gear ring, and the second connecting cylinder is connected with the first gear ring and the second planet carrier, so that the first planet carrier and the second gear ring are integrated, and the first gear ring and the second planet carrier are integrated. That is, when the first carrier of the first planetary gear train rotates, the second ring gear of the second planetary gear train also rotates together; when the first gear ring of the first planetary gear train rotates, the second planet carrier of the second planetary gear train also rotates together. Therefore, when the hybrid power system works, the hybrid power system can be switched to any one of the first gear, the second gear, the third gear, the fourth gear and the reverse gear by combining the control of the clutch and the brake.
And when the first gear is in the first gear, the first clutch is controlled to be in a combined state, the second clutch and the third clutch are controlled to be in a separated state, the first brake is controlled to brake, and the second brake is controlled not to brake. At this time, power is transmitted from the center wheel of the first planetary gear train to the carrier, the speed ratio of the first center wheel to the first carrier is 2.5 to 5, and the speed ratio is large, so that the vehicle can be in a high-speed running state.
And when the second gear is in the second gear, the first clutch is controlled to be in a combined state, the second clutch and the third clutch are controlled to be in a separated state, the first brake is controlled not to brake, and the second brake is controlled to brake. At this time, power is transmitted from the first center wheel to the first planetary gear, where it is transmitted in two paths. Because the one-way clutch is arranged on the second connecting cylinder, the one-way clutch only allows the second connecting cylinder to rotate in one way, when power is transmitted from the first planet wheel to the first gear ring, the one-way clutch brakes the first gear ring, and 1 of the two paths is directly transmitted to the first planet carrier through the first planet wheel so as to drive the wheels to rotate; and the other 1 of the two paths is from the first planet carrier to the second ring gear and is transmitted from the second ring gear to the second planet wheel and the second planet carrier, and the one-way clutch only allows the second connecting cylinder to rotate in one direction, so that the one-way clutch allows power to be transmitted from the second planet carrier to the first ring gear and to be transmitted to the first planet wheel and the first planet carrier again. In this case, the speed ratio is reduced on the basis of the first gear, so that the wheels are in a medium-high speed running state, and the running mode in the second gear is realized.
And in the third gear, the first clutch and the second clutch are controlled to be in a combined state, the third clutch is controlled to be in a separated state, and the first brake and the second brake are controlled not to brake. At the moment, the main shaft drives the first central wheel and the second planet carrier to rotate simultaneously, the second planet carrier and the first gear ring are connected into a whole through the second connecting cylinder, namely the first central wheel and the first gear ring rotate together, the whole first planet gear train is a whole, power is directly transmitted to the first planet carrier through the first central wheel, the speed ratio of the first central wheel and the first planet carrier is 1, the speed ratio is moderate, and the vehicle can be in a medium-speed running state.
And in the fourth gear, the first clutch and the third clutch are controlled to be in a separation state, the second clutch is controlled to be in a combination state, the first brake is controlled not to brake, and the second brake is controlled to brake. At this time, power is transmitted to the second planet carrier of the second planetary gear train from the main shaft and is transmitted to the first planet carrier by the second gear ring, the speed ratio of the second planet carrier and the second gear ring is 0.6-0.8, the speed ratio is small, and therefore the vehicle can be in a low-speed running state.
And when the reverse gear is performed, the first clutch and the second clutch are controlled to be in a separation state, the third clutch is controlled to be in a combination state, the first brake is controlled to brake, and the second brake is controlled not to brake. At the moment, power is transmitted to the second central wheel of the second planetary gear train from the main shaft and is transmitted to the second gear ring from the second central wheel, and the rotation directions of the second central wheel and the second gear ring are opposite, so that the vehicle can reverse and reverse gear running is realized.
Because this embodiment of this disclosure need not to adopt the mode that sets up multiunit gear train and realize many fender position variable speeds among the correlation technique, just can realize the switching that four fender position of hybrid power system and reverse gear according to different operating mode demands, when reducing hybrid power system's space occupation ratio, still strengthened hybrid power system's adaptability, and improve the work efficiency of power supply.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a hybrid powertrain system provided by an embodiment of the present disclosure;
FIG. 2 is a power transmission schematic diagram of a hybrid powertrain provided by an embodiment of the present disclosure;
FIG. 3 is a power transmission schematic diagram of a hybrid powertrain provided by an embodiment of the present disclosure;
FIG. 4 is a power transmission schematic diagram of a hybrid powertrain provided by an embodiment of the present disclosure;
FIG. 5 is a power transmission schematic diagram of a hybrid powertrain provided by an embodiment of the present disclosure;
FIG. 6 is a power transmission schematic diagram of a hybrid powertrain provided by an embodiment of the present disclosure;
FIG. 7 is a power transmission schematic diagram of a hybrid powertrain provided by an embodiment of the present disclosure;
FIG. 8 is a power transmission schematic diagram of a hybrid powertrain provided by an embodiment of the present disclosure;
FIG. 9 is a power transmission schematic diagram of a hybrid powertrain provided by an embodiment of the present disclosure;
FIG. 10 is a power transmission schematic diagram of a hybrid powertrain provided by an embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a hybrid power system provided in an embodiment of the present disclosure. As shown in fig. 1, the hybrid system includes: the hybrid vehicle comprises an engine 1, a main shaft 10, a first clutch 21, a second clutch 22, a third clutch 23, a one-way clutch 24, a first planetary gear train 60, a second planetary gear train 70, a first connecting cylinder 81, a second connecting cylinder 82, a first brake 31, a second brake 32, a first motor 41 and a power supply assembly 50.
As shown in fig. 1, the output shaft of the engine 1 is coaxially connected to the main shaft 10, the rotor of the first motor 41 is coaxially connected to the main shaft 10, and the first carrier 63 is drivingly connected to the wheel.
As shown in fig. 1, the first planetary gear train 60 includes: the first central wheel 61 is sleeved on the main shaft 10, the first central wheel 61 is in clearance fit with the main shaft 10, the first central wheel 61 is arranged in the first gear ring 64, the first planetary wheel 62 is arranged between the first central wheel 61 and the first gear ring 64 and meshed with the first central wheel 61 and the first gear ring 64, the first planetary wheel 62 is rotatably arranged on the first planet carrier 63, and the first planet carrier 63 is in transmission connection with wheels.
As shown in fig. 1, the second planetary gear train 70 includes: the planetary gear transmission mechanism comprises a second central gear 71, a second planetary gear 72, a second planet carrier 73 and a second gear ring 74, wherein one end of a first connecting cylinder 81 is coaxially and fixedly connected with the first planet carrier 63, the other end of the first connecting cylinder 81 is coaxially and fixedly connected with the second gear ring 74, the second central gear 71 is arranged in the second gear ring 74, the second planetary gear 72 is arranged between the second central gear 71 and the second gear ring 74 and meshed with the second central gear 71 and the second gear ring 74, the second planetary gear 72 is rotatably arranged on the second planet carrier 73, one end of a second connecting cylinder 82 is coaxially and fixedly connected with the first gear ring 64, and the other end of the second connecting cylinder 82 is coaxially and fixedly connected with the second planet carrier 73.
The first clutch 21, the second clutch 22, and the third clutch 23 each include a driving portion 26 and a driven portion 27. As shown in fig. 1, the driving portion 26 of the first clutch 21 is connected to the main shaft 10, the driven portion 27 of the first clutch 21 is connected to the first center gear 61, the driving portion 26 of the second clutch 22 is connected to the main shaft 10, the driven portion 27 of the second clutch 22 is connected to the second carrier 73, the driving portion 26 of the third clutch 23 is connected to the main shaft 10, and the driven portion 27 of the third clutch 23 is connected to the second center gear 71. As shown in fig. 1, the one-way clutch 24 is located on the second connector barrel 82.
The first brake 31 is used for braking the first ring gear 64, the second brake 32 is used for braking the second center wheel 71, the power supply assembly 50 is connected with the first motor 41, and the power supply assembly 51 is used for supplying power to the first motor 41.
The hybrid power system comprises two planetary gear trains which are arranged at intervals, wherein one end of a first connecting cylinder is coaxially and fixedly connected with a first planet carrier, the other end of the first connecting cylinder is coaxially and fixedly connected with a second gear ring, one end of a second connecting cylinder is coaxially and fixedly connected with the first gear ring, and the other end of the second connecting cylinder is coaxially and fixedly connected with a second planet carrier. The first connecting cylinder is connected with the first planet carrier and the second gear ring, and the second connecting cylinder is connected with the first gear ring and the second planet carrier, so that the first planet carrier and the second gear ring are integrated, and the first gear ring and the second planet carrier are integrated. That is, when the first carrier 63 of the first planetary gear train 60 rotates, the second ring gear 74 of the second planetary gear train 70 also rotates together; when the first ring gear 64 of the first planetary gear train 60 rotates, the second carrier 73 of the second planetary gear train 70 also rotates together. Therefore, when the hybrid power system works, the hybrid power system can be switched to any one of the first gear, the second gear, the third gear, the fourth gear and the reverse gear by combining the control of the clutch and the brake.
In the first gear, the first clutch 21 is controlled to be engaged, the second clutch 22 and the third clutch 23 are controlled to be disengaged, the first brake 31 is controlled to brake, and the second brake 32 is controlled not to brake. At this time, power is transmitted from the center wheel of the first planetary gear train 60 to the carrier, and the first center wheel 61 and the first carrier 63 have a speed ratio of 2.5 to 5, which is large, so that the vehicle can be in a high-speed running state.
In the second gear, the first clutch 21 is controlled to be engaged, the second clutch 22 and the third clutch 23 are controlled to be disengaged, the first brake 31 is controlled not to brake, and the second brake 32 is controlled to brake. At this time, the power first center wheel 61 is transmitted to the first planetary wheel 62, and the power is transmitted in two paths at the first planetary wheel 62. Since the one-way clutch 24 is provided on the second connecting cylinder 82, the one-way clutch 24 allows only one-way rotation of the second connecting cylinder 82, and when power is transmitted from the first planetary gear 62 to the first ring gear 64 and the second connecting cylinder 82, the one-way clutch 24 brakes the first ring gear 64 and the second connecting cylinder 82, so that 1 of the two paths is directly transmitted to the first carrier 63 via the first planetary gear 62 to drive the wheels to rotate; and the other 1 of the two paths is from the first planet carrier 63 to the second ring gear 74, and the second ring gear 74 is transmitted to the second planet gears 72 and the second planet carrier 73, the one-way clutch 24 only allows the second connecting cylinder 82 to rotate in one direction, so that the one-way clutch 24 allows power to be transmitted from the second planet carrier 73 to the first ring gear 64 and transmitted to the first planet gears 62 and the first planet carrier 63 again. In this case, the speed ratio is reduced on the basis of the first gear, so that the wheels are in a medium-high speed running state, and the running mode in the second gear is realized.
In the third gear, the first clutch 21 and the second clutch 22 are controlled to be in the engaged state, the third clutch 23 is controlled to be in the disengaged state, and the first brake 31 and the second brake 32 are controlled not to brake. At this time, the main shaft 10 drives the first central wheel 61 and the second planet carrier 73 to rotate simultaneously, the second planet carrier 73 and the first gear ring 64 are connected into a whole through the second connecting cylinder 82, that is, the first central wheel 61 and the first gear ring 64 rotate together, the whole first planetary gear train 60 is a whole, power is directly transmitted to the first planet carrier 63 through the first central wheel 61, the speed ratio of the first central wheel 61 and the first planet carrier 63 is 1, and the speed ratio is moderate, so that the vehicle can be in a medium-speed running state.
In the fourth gear, the first clutch 21 and the third clutch 23 are controlled to be in a disengaged state, the second clutch 22 is controlled to be in an engaged state, the first brake 31 is controlled not to brake, and the second brake 32 is controlled to brake. At this time, power is transmitted from the main shaft 10 to the second carrier 73 of the second planetary gear train 70 and is transmitted from the second ring gear 74 to the first carrier 63, and the speed ratio of the second carrier 73 and the second ring gear 74 is 0.6 to 0.8, which is small, so that the vehicle can be in a low-speed running state.
During reverse gear, the first clutch 21 and the second clutch 22 are controlled to be in a disengaged state, the third clutch 23 is controlled to be in an engaged state, the first brake 31 is controlled to brake, and the second brake 32 is controlled not to brake. At this time, power is transmitted from the main shaft 10 to the second sun gear 71 of the second planetary gear train 70 and is transmitted from the second sun gear 71 to the second ring gear 74, and at this time, the rotation directions of the second sun gear 71 and the second ring gear 74 are reversed, thereby allowing the vehicle to reverse and realize reverse running.
Because this embodiment of this disclosure need not to adopt the mode that sets up multiunit gear train and realize many fender position variable speeds among the correlation technique, just can realize the switching that four fender position of hybrid power system and reverse gear according to different operating mode demands, when reducing hybrid power system's space occupation ratio, still strengthened hybrid power system's adaptability, and improve the work efficiency of power supply.
In the disclosed embodiment, the hybrid system may be installed in a housing to protect various components in the hybrid system. The brake and the one-way clutch can be fixed on the housing by using the housing as a mounting base. The housing may be a casing of a transmission case in a vehicle, or the like.
For example, the first brake 31 and the second brake 32 may each be a disc brake. Wherein the rotating element in the disc brake is a brake disc working at the end face, the disc brake generating braking by clamping the brake disc from both sides using friction elements.
As shown in fig. 1, the brake disc of the first brake 31 is connected to the first ring gear 64, and the friction element of the first brake 31 is fixed to the housing a, so that the first brake 31 is fixedly mounted to the housing a. The brake disc of the second brake 32 is connected to the second center wheel 71, and the friction elements of the second brake 32 are fixed to the housing a, thereby fixedly mounting the second brake 32 to the housing a.
As shown in FIG. 1, the one-way clutch 24 may include an inner race 24a and an outer race 24b, the inner race 24a of the one-way clutch 24 being coaxially mounted on the second connector barrel 82, and the outer race 24b of the one-way clutch 24 being mounted on the housing A. The one-way clutch allows only one-way rotation of the second connector barrel 82. For example, power is transmitted from the second connecting cylinder 82 to the first ring gear 64, while the second connecting cylinder 82 rotates in the direction allowed by the one-way clutch 24, and the inner race 24a and the outer race 24b of the one-way clutch 24 are separated from each other without braking the second connecting cylinder 82, thereby allowing power to be transmitted from the second connecting cylinder 82 to the first ring gear 64. Since the power is transmitted from the first ring gear 64 to the second connecting cylinder 82, the second connecting cylinder 82 rotates in a direction not allowed by the one-way clutch 24, and the inner race 24a and the outer race 24b of the one-way clutch 24 are coupled to each other to brake the second connecting cylinder 82, the first ring gear 64 is braked, and the power cannot be transmitted from the first ring gear 64 to the second connecting cylinder 82.
In the embodiment of the present disclosure, each of the first clutch 21, the second clutch 22 and the third clutch 23 includes a driving portion 26 and a driven portion 27, wherein the driven portion 27 is used to output the power transmitted from the driving portion 26 to a member connected to the driven portion 27. For example, the driving portion 26 may be a flywheel of a clutch, and the driven portion 27 may be a driven plate of the clutch. When the clutch is in a separation state, a flywheel of the clutch and a driven plate of the clutch are separated from each other, so that a part connected with the flywheel and a part connected with the driven plate cannot transmit power; when the clutch is in a combined state, the flywheel of the clutch and the driven disc of the clutch are combined with each other, and the flywheel can drive the driven disc to rotate, so that power on a part connected with the flywheel can be transmitted to the part connected with the driven disc.
As shown in fig. 1, the hybrid system further includes a second motor 42 and a fourth clutch 25, a rotor of the second motor 42 is coaxially connected with the main shaft 10, the second motor 42 is located between the engine 1 and the first motor 41, the first clutch 21 is mounted on the main shaft 10, and the fourth clutch 25 is located between the first motor 41 and the second motor 42. In the embodiment of the disclosure, the vehicle is driven by two motors together, so that the power performance of the hybrid power system is improved, and the two motors can be mutually standby, so that the reliability is improved. And a fourth clutch 25 is arranged between the two motors, and the four clutches 25 separate the two motors, so that when only a single motor is needed for driving, the power of the first motor 41 can be prevented from being transmitted to the second motor 42 and being lost, and the power can be completely transmitted to the wheels.
As shown in fig. 1, the power supply assembly 50 includes: a battery 51 and two inverters 52, one of the two inverters 52 being connected between the battery 51 and the first motor 41, and the other of the two inverters 52 being connected between the battery 51 and the second motor 42. In the embodiment of the present invention, two inverters 52 are provided, one for connecting the battery 51 and the first motor 41, and the other for connecting the battery 51 and the second motor 42. The battery 51 is a rechargeable battery 51, and the inverter 52 is disposed on an output circuit of the battery 51, and is configured to convert a direct current output by the battery 51 into a three-phase alternating current to drive the first motor 41 or the second motor 42. In addition, the inverter 52 and the transformer are integrated together in the embodiment of the invention, so that the installation is convenient and the installation space is saved.
The disclosed embodiment provides a control method of a hybrid system, which is used for controlling the hybrid system, and comprises the following steps: and controlling the hybrid power system to operate in any one of power modes, wherein the power modes comprise a pure electric mode, a pure engine mode, a hybrid driving mode, an energy recovery mode and a parking power generation mode.
Alternatively, the hybrid power system is controlled to operate in any one of the power gears when the hybrid power system is in an electric-only mode, an engine-only mode, a hybrid driving mode or an energy recovery mode. Wherein, power keeps off the position and includes: the first gear, the second gear, the third gear, the fourth gear and the reverse gear.
The four gears have different speed ratios, so that when power on the power source can be transmitted to the wheels, the wheels can have different rotating speeds, and the running modes of different conditions are realized.
The following describes a control method for different gears with reference to different power modes of the hybrid power system:
in some embodiments of the present disclosure, when controlling the hybrid system to switch to the electric-only mode, the control method includes:
as shown in fig. 2, the mode is the first gear state of the electric-only mode, and the specific control process is as follows: the first clutch 21 is controlled to be in an engaged state, the second clutch 22 and the third clutch 23 are controlled to be in a disengaged state, the first brake 31 is controlled to brake, and the second brake 32 is controlled not to brake. The engine 1 and the second motor 42 are controlled not to operate, the fourth clutch 25 is controlled to be in a separated state, and the first motor 41 is controlled to operate.
In this power mode, only the first motor 41 is operated to drive the wheels, the engine 1 and the second motor 42 are not operated, the first clutch 21 is in an engaged state and the first brake 31 is braked, the second clutch 22, the third clutch 23 and the fourth clutch 25 are all in a disengaged state, and the second brake 32 is not braked. The fourth clutch 25 cuts off the power transmission among the engine 1, the second motor 42, and the wheels, and the first motor 41 drives the vehicle to travel. The power supply assembly 50 discharges, the inverter 52 converts direct current into three-phase alternating current and then drives a rotor of the first motor 41 to rotate, the first motor 41 converts electric energy into mechanical energy and transmits the mechanical energy to the spindle 10, and power is finally transmitted to wheels through the first clutch 21, the first central wheel 61, the first planet wheel 62, the first planet carrier 63 and a differential mounted on a wheel driving shaft, so that the first motor 41 can independently drive the vehicle to run in a first gear state.
As shown in fig. 3, the mode is the second gear state of the pure electric mode, and the specific control process is as follows: when the hybrid power system is controlled to be switched to the second gear, the first clutch 21 is controlled to be in an engaged state, the second clutch 22 and the third clutch 23 are controlled to be in a disengaged state, the first brake 31 is controlled not to brake, and the second brake 32 is controlled to brake.
In this power mode, the wheels are driven with only the first motor 41 operating, and the engine 1 and the first motor 41 are not operated, the first clutch 21 is in the engaged state and the second brake 32 is braked, the second clutch 22, the third clutch 23 and the fourth clutch 25 are in the disengaged state, and the first brake 31 is not braked. The fourth clutch 25 cuts off the power transmission among the engine 1, the second motor 42, and the wheels, and the first motor 41 drives the vehicle to travel. The power supply assembly 50 discharges, converts direct current into three-phase alternating current through the inverter 52, and then drives the rotor of the first motor 41 to rotate, the first motor 41 converts electric energy into mechanical energy to be transmitted to the spindle 10, and power is transmitted from the spindle 10 to the first center wheel 61 and the first planet wheel 62, and at the first planet wheel 62, power is transmitted in two paths. Since the fourth clutch 24 is disposed on the second connecting cylinder 82, and the fourth clutch 24 is a one-way clutch, the one-way clutch 24 only allows the second connecting cylinder 82 to rotate in one direction, when power is transmitted from the first planetary gear 62 to the first ring gear 64, the fourth clutch 24 brakes the second connecting cylinder 82, so that 1 of the two paths is directly transmitted to the first carrier 63 via the first planetary gear 62 to drive the wheels to rotate; and the other 1 of the two paths, namely the first planet carrier 63, the first connecting cylinder 81 to the second ring gear 74, and the second ring gear 74 is transmitted to the second planet gears 72 and the second planet carrier 73, the one-way clutch 24 only allows the second connecting cylinder 82 to rotate in one direction, so that the one-way clutch 24 allows power to be transmitted to the first ring gear 64 from the second planet carrier 73 and the second connecting cylinder 82, and then to be transmitted to the first planet gears 62 and the first planet carrier 63 again, at this time, the speed ratio is reduced on the basis of the first gear, and the speed ratio is greater than 1, so that the wheels are in a medium-high speed running state, and the running mode of the second gear is realized.
As shown in fig. 4, the mode is the third gear state of the electric-only mode, and the specific control process is as follows: when the hybrid system is controlled to be switched to the third gear, the first clutch 21 and the second clutch 22 are controlled to be in the engaged state, the third clutch 23 is controlled to be in the disengaged state, and the first brake 31 and the second brake 32 are controlled not to brake.
In the power mode, only the first motor 41 is used for driving the wheels, the engine 1 and the second motor 42 are not operated, the first clutch 21 and the second clutch 22 are in a combined state, at this time, the main shaft 10 drives the first central wheel 61 and the second planet carrier 73 to rotate simultaneously, the second planet carrier 73 and the first ring gear 64 are connected into a whole through the second connecting cylinder 82, that is, the first central wheel 61 and the first ring gear 64 rotate together, and the whole first planetary gear train 60 is a whole. Namely, the relative operation between the two planetary gear trains is locked, and the whole structure operates as 1 whole. The fourth clutch 25 cuts off the power transmission among the engine 1, the second motor 42, and the wheels, and the first motor 41 drives the vehicle to travel. The power supply assembly 50 discharges, the inverter 52 converts direct current into three-phase alternating current and then drives a rotor of the first motor 41 to rotate, the first motor 41 converts electric energy into mechanical energy and transmits the mechanical energy to the main shaft 10, power is directly transmitted to the first planet carrier 63 through the first central wheel 61, the speed ratio of the first central wheel 61 and the first planet carrier 63 is 1, the speed ratio is moderate, and therefore the vehicle can be in a medium-speed running state.
As shown in fig. 5, the mode is the fourth gear state of the electric-only mode, and the specific control process is as follows: when the hybrid power system is controlled to be switched to the fourth gear, the first clutch 21 and the third clutch 23 are controlled to be in a separated state, the second clutch 22 is controlled to be in a combined state, the first brake 31 is controlled not to brake, and the second brake 32 is controlled to brake.
In the power mode, the wheels are driven only by the operation of the first motor 41, that is, the engine 1 and the second motor 42 are not operated, the second clutch 22 is in the engaged state and the second brake 32 is braked, the first clutch 21, the third clutch 23 and the fourth clutch 25 are all in the disengaged state, and the first brake 31 is not braked. The fourth clutch 25 cuts off the power transmission among the engine 1, the second motor 42, and the wheels, and the first motor 41 drives the vehicle to travel. The power supply assembly 50 discharges, the inverter 52 converts direct current into three-phase alternating current and then drives a rotor of the first motor 41 to rotate, the first motor 41 converts electric energy into mechanical energy and transmits the mechanical energy to the spindle 10, and power is finally transmitted to wheels through the second clutch 22, the second planet carrier 73, the second planet wheel 72, the second gear ring 74, the first connecting cylinder 81, the first planet carrier 63 and the differential mounted on the wheel driving shaft. Since the power is transmitted from the main shaft 10 to the second carrier 73 of the second planetary gear train 70 and is transmitted from the second ring gear 74 to the first carrier 63 at this time, the speed ratio of the second carrier 73 and the second ring gear 74 is 0.6 to 0.8, and the speed ratio is small, so that the vehicle can be in a low-speed running state.
As shown in fig. 6, the mode is a reverse gear state of the electric-only mode, and the specific control process is as follows: when the hybrid system is controlled to be switched to the reverse gear, the first clutch 21 and the second clutch 22 are controlled to be in a separated state, the third clutch 23 is controlled to be in an engaged state, the first brake 31 is controlled to brake, and the second brake 32 is controlled not to brake.
In this power mode, only the first motor 41 is operated to drive the wheels, the engine 1 and the second motor 42 are not operated, the third clutch 23 is in an engaged state and the first brake 31 is braked, the first clutch 21, the second clutch 22 and the fourth clutch 25 are all in a disengaged state, and the second brake 32 is not braked. The fourth clutch 25 cuts off the power transmission among the engine 1, the second motor 42, and the wheels, and the first motor 41 drives the vehicle to travel. The power supply assembly 50 discharges, the direct current is converted into three-phase alternating current through the inverter 52, then the rotor of the first motor 41 is driven to rotate, the first motor 41 converts the electric energy into mechanical energy and transmits the mechanical energy to the spindle 10, the power is transmitted to the second sun gear 71 of the second planetary gear train 70 from the spindle 10 and is transmitted to the second ring gear 74 through the second sun gear 71, and at the moment, the rotation directions of the second sun gear 71 and the second ring gear 74 are opposite, so that the vehicle can reverse and reverse driving is realized.
In other implementations of the electric-only power mode, the engine 1 and the first motor 41 may also be controlled not to work, the fourth clutch 25 is controlled to be in a combined state, and the second motor 42 is controlled to work. That is, the second motor 42 is controlled to drive the vehicle, which is different from the foregoing driving of the vehicle by the first motor 41 in that: the fourth clutch 25 is engaged to ensure that the power of the second motor 42 can be transmitted to the wheels to realize the mode for driving the vehicle. In each power gear driven by the second motor 42, the control modes of each clutch and the brake are the same, and the first gear, the second gear, the third gear, the fourth gear and the reverse gear can be realized, so as to realize the operation modes of different vehicle speeds, which is not described in detail in the embodiment of the present disclosure.
In still other implementations of the electric-only power mode, the engine 1 may also be controlled not to work, the fourth clutch 25 is controlled to be in a combined state, and the first electric machine 41 and the second electric machine 42 are controlled to work together. That is, the first motor 41 and the second motor 42 are controlled to drive the vehicle together, which is different from the foregoing driving of the vehicle by the first motor 41: the fourth clutch 25 is engaged at this time, so that the power of the second motor 42 can be transmitted to the wheels, thereby implementing the running mode of the two-motor vehicle. In each power gear driven by the first motor 41 and the second motor 42, the control modes of each clutch and the brake are the same, and the first gear, the second gear, the third gear, the fourth gear and the reverse gear can be realized, so as to realize the operation modes of different vehicle speeds, which is not described in detail in the embodiment of the present disclosure.
In some embodiments of the present disclosure, when controlling the hybrid system to switch to the engine-only mode, the control method includes:
as shown in fig. 7, the first motor 41 and the second motor 42 are controlled not to operate, the fourth clutch 25 is controlled to be in a coupled state, and the engine 1 is controlled to operate. In this power mode, the first motor 41 and the second motor 42 are controlled not to be operated, and the fourth clutch 25 is controlled to be in the engaged state, so that the power of the engine 1 can be transmitted to the wheels. I.e. to drive the vehicle with the engine 1. The pure engine mode and the pure electric mode are adopted to drive the vehicle, the switching of five power gears can be realized, the control modes of the clutches and the brakes are consistent with the control mode of the pure electric mode, and the first gear, the second gear, the third gear, the fourth gear and the reverse gear can be realized, so that the running modes of different vehicle speeds can be realized.
The embodiment of the present disclosure is described by taking only the first gear state of the engine only mode as an example, and the specific control process is as follows: the first clutch 21 and the fourth clutch 25 are controlled to be engaged, the second clutch 22 and the third clutch 23 are controlled to be disengaged, the first brake 31 is controlled to brake, and the second brake 32 is controlled not to brake. The first motor 41 and the second motor 42 are controlled not to work, and the engine 1 is controlled to work.
In the power mode, only the engine 1 is used for driving the wheels, the power output by the engine 1 is transmitted to the main shaft 10, and the power is finally transmitted to the wheels through the first clutch 21, the first central wheel 61, the first planet wheel 62, the first planet carrier 63 and the differential mounted on the wheel driving shaft, so that the first motor 41 is used for driving the vehicle to run in the first gear state alone.
It should be noted that, in the engine only mode, the control manners of the clutches and the brakes in the second gear, the third gear, the fourth gear, and the reverse gear states are all the same as those of the control manners in the electric only mode, and details of the embodiment of the present disclosure are not repeated.
In some embodiments of the present disclosure, when the hybrid power system is controlled to switch to the hybrid driving mode, the control method includes the following five control modes:
first, the engine 1 and the first and second electric machines 41 and 42 are operated simultaneously to drive the wheels to rotate. That is, the first motor 41, the second motor 42 and the engine 1 are controlled to operate, and the fourth clutch 25 is controlled to be in the engaged state.
Secondly, only the engine 1 and the first electric machine 41 are operated, and both drive the wheels to rotate. That is, the first motor 41 and the engine 1 are controlled to operate, the fourth clutch 25 is controlled to be in a coupled state, and the second motor 42 is controlled not to operate.
Thirdly, only the engine 1 and the second electric machine 42 are operated, and both drive the wheels to rotate. That is, the second motor 42 and the engine 1 are controlled to operate, the fourth clutch 25 is controlled to be in a coupled state, and the first motor 41 is controlled not to operate.
Fourthly, only the engine 1 works, the engine 1 drives wheels to rotate, and the engine 1 works and drives one motor to generate electricity at the same time. That is, the engine 1 is controlled to operate, the fourth clutch 25 is controlled to be in the engaged state, and the engine 1 is controlled to drive the first motor 41 to generate power.
Fifthly, only the engine 1 works, the engine 1 drives wheels to rotate, and the engine 1 works and drives one motor to generate electricity at the same time. That is, the engine 1 is controlled to operate, the fourth clutch 25 is controlled to be in the engaged state, and the engine 1 is controlled to drive the second motor 42 to generate power.
In the above five hybrid drive modes, the hybrid drive mode and the pure electric mode in the foregoing are used to drive the vehicle, and the switching of the five power gears can be realized, and the control modes of each clutch and each brake are identical to the control mode in the pure electric mode in the foregoing, and the first gear, the second gear, the third gear, the fourth gear and the reverse gear can be realized, so as to realize the operation modes of different vehicle speeds.
The embodiment of the present disclosure takes the first gear state of the first hybrid driving mode and the fifth hybrid driving mode as an example, and the specific control process is as follows:
as shown in fig. 8, the procedure of the control method for the first gear state in the first hybrid drive mode is as follows: the engine 1, the first motor 41 and the second motor 42 work together to jointly drive the vehicle to run, so that larger power can be output, and the dynamic property of the whole vehicle is improved. The first clutch 21 and the fourth clutch 25 are controlled to be engaged, the second clutch 22 and the third clutch 23 are controlled to be disengaged, the first brake 31 is controlled to brake, and the second brake 32 is controlled not to brake. The vehicle is driven by the engine 1, the first motor 41 and the second motor 42 together. The power supply assembly 50 discharges, the inverter 52 converts direct current into three-phase alternating current to drive the rotor of the first motor 41 to rotate, the first motor 41 converts electric energy into mechanical energy to be transmitted to the spindle 10, and the second motor 42 can be in a power generation or electric state according to the vehicle speed and torque requirements. The torque of the engine 1 is rigidly connected with the rotor of the first electric machine 41 through the fourth clutch 25, and is coupled with the torque provided by the first electric machine 41, and the main shaft 10, the first clutch 21 and the first planetary gear train 60 are transmitted to the wheels, so that the vehicle driven by the 3 power sources jointly is switched into the first gear running mode.
It should be noted that the control manners of the clutches and the brakes in the second gear, the third gear, the fourth gear and the reverse gear state in the first hybrid driving mode are all the same as those of the control manners in the pure electric mode, and details of the embodiment of the present disclosure are not repeated. And the work at the second gear, the third gear, the fourth gear and the reverse gear is realized, the aim of ensuring the efficient operation of the engine 1 at the full-speed section of the vehicle is fulfilled, and the dynamic property of the whole vehicle is also ensured by multiple gears.
As shown in fig. 9, the process of the control method for the first gear state in the fifth hybrid driving mode is as follows: the engine 1 and the first motor 41 are operated, the second motor 42 is not operated, the vehicle is driven to start and run by the power supplied by the engine 1, and the first motor 41 operates in a power generation or electric mode according to the vehicle speed and the torque demand. The first clutch 21 and the fourth clutch 25 are controlled to be engaged, the second clutch 22 and the third clutch 23 are controlled to be disengaged, the first brake 31 is controlled to brake, and the second brake 32 is controlled not to brake. The vehicle is driven by the engine 1 and the first motor 41 together. The power supply assembly 50 discharges, the inverter 52 converts direct current into three-phase alternating current to drive the rotor of the first motor 41 to rotate, the first motor 41 converts electric energy into mechanical energy to be transmitted to the spindle 10, and the first motor 41 is in a power generation or electric state according to the vehicle speed and torque requirements. The torque of the engine 1 is rigidly connected with the rotor of the first electric machine 41 through the fourth clutch 25, and is coupled with the torque provided by the first electric machine 41, and the main shaft 10, the first clutch 21 and the first planetary gear train 60 are transmitted to the wheels, so that the vehicle driven by the two power sources jointly is switched into the first gear running mode.
When the battery 51 of the power supply assembly 50 is low, the first motor 41 can be in the power generation state to charge the battery 51 of the power supply assembly 50.
It should be noted that, the control manners of the clutches and the brakes in the second gear, the third gear, the fourth gear, and the reverse gear states in the fifth hybrid driving mode are all the same as those in the pure electric mode, and details of the embodiment of the present disclosure are not repeated. And the work at the second gear, the third gear, the fourth gear and the reverse gear is realized, the aim of ensuring the efficient operation of the engine 1 at the full-speed section of the vehicle is fulfilled, and the dynamic property of the whole vehicle is also ensured by multiple gears.
In some embodiments of the present disclosure, when controlling the hybrid system to switch to the energy recovery mode, the control method includes:
as shown in fig. 10, the engine 1 and the second motor 42 are controlled not to operate, the fourth clutch 25 is controlled to be in a disengaged state, and the first motor 41 is controlled to generate power. The energy recovery mode and the pure electric mode are adopted to drive the vehicle, the five power gears can be switched, the control modes of the clutches and the brakes are consistent with the control mode of the pure electric mode, and the first gear, the second gear, the third gear, the fourth gear and the reverse gear can be achieved, so that energy recovery is achieved.
The first gear state of the energy recovery mode is taken as an example for explanation in the embodiment of the present disclosure, and the specific control process is as follows: when the vehicle is coasting or braking, the hybrid system provides a reverse torque to the vehicle, converting a portion of the kinetic energy of the vehicle into electrical energy via the first electrical machine 41, and storing the electrical energy in the battery 51 of the power supply assembly 50 for later use. The first clutch 21 is controlled to be in an engaged state, the second clutch 22, the third clutch 23 and the fourth clutch 25 are controlled to be in a disengaged state, the first brake 31 is controlled to brake, and the second brake 32 is controlled not to brake. Under the working conditions of sliding and braking, the first motor 41 starts a power generation working mode, the engine 1 and the second motor 42 do not work, the whole vehicle kinetic energy drives the first motor 41 to generate power through wheels, the first planetary gear train 60 and the main shaft 10, and the electric energy is stored into a battery 51 in the power supply assembly 50 through the inverter 52, so that the energy recovery function of the first motor 41 in the first gear state is realized.
It should be noted that the control manners of the clutches and the brakes in the second gear, the third gear, the fourth gear and the reverse gear states in the energy recovery mode are the same as those in the pure electric mode, and details of the embodiment of the present disclosure are not repeated.
In some embodiments of the present disclosure, when controlling the hybrid system to switch to the parking power generation mode, the control method includes:
the first method comprises the following steps: the engine 1 is controlled to work, the first motor 41 is controlled not to work, the fourth clutch 25 is controlled to be in a separation state, and the engine 1 is controlled to drive the second motor 42 to generate electricity.
Secondly, the engine 1 is controlled to operate, the second motor 42 is controlled not to operate, the fourth clutch 25 is controlled to be in a combined state, the first clutch 21 is controlled to be in a separated state, and the engine 1 is controlled to drive the first motor 41 to generate electricity.
In the parking power generation mode, the engine 1 may be used to drive the first motor 41 or the second motor 42 to generate power, and the power transmission direction in this mode may be as follows: the output power of the engine 1 is transmitted to the first motor 41 or the second motor 42 through the main shaft 10 in sequence, at this time, the first motor 41 or the second motor 42 is in a power generation state, and the electric energy is stored in the power supply assembly 50.
The above description is meant to be illustrative of the principles of the present disclosure and not to be taken in a limiting sense, and any modifications, equivalents, improvements and the like that are within the spirit and scope of the present disclosure are intended to be included therein.

Claims (10)

1. A hybrid system, characterized by comprising: an engine (1), a main shaft (10), a first clutch (21), a second clutch (22), a third clutch (23), a one-way clutch (24), a first planetary gear train (60), a second planetary gear train (70), a first connecting cylinder (81), a second connecting cylinder (82), a first brake (31), a second brake (32), a first motor (41) and a power supply component (50),
the output shaft of the engine (1) is coaxially connected with the main shaft (10), the rotor of the first motor (41) is coaxially connected with the main shaft (10),
the first planetary gear train (60) comprises: first centre wheel (61), first star gear (62), first planet carrier (63) and first ring gear (64), first centre wheel (61) suit is in on main shaft (10), first centre wheel (61) with main shaft (10) clearance fit, first centre wheel (61) are located in first ring gear (64), first star gear (62) set up first centre wheel (61) with between first ring gear (64) and with first centre wheel (61) with first ring gear (64) meshing, first star gear (62) rotationally set up on first planet carrier (63), first planet carrier (63) are connected with wheel drive,
the second planetary gear train (70) includes: a second central wheel (71), a second planet wheel (72), a second planet carrier (73) and a second gear ring (74), wherein one end of the first connecting cylinder (81) is coaxially and fixedly connected with the first planet carrier (63), the other end of the first connecting cylinder (81) is coaxially and fixedly connected with the second gear ring (74), the second central wheel (71) is arranged in the second gear ring (74), the second planet wheel (72) is arranged between the second central wheel (71) and the second gear ring (74) and is meshed with the second central wheel (71) and the second gear ring (74), the second planet wheel (72) is rotatably arranged on the second planet carrier (73), one end of the second connecting cylinder (82) is coaxially and fixedly connected with the first gear ring (64), and the other end of the second connecting cylinder (82) is coaxially and fixedly connected with the second planet carrier (73),
the first clutch (21), the second clutch (22) and the third clutch (23) comprise a driving part (26) and a driven part (27), the driving part (26) of the first clutch (21) is connected with the main shaft (10), the driven part (27) of the first clutch (21) is connected with the first central wheel (61), the driving part (26) of the second clutch (22) is connected with the main shaft (10), the driven part (27) of the second clutch (22) is connected with the second planet carrier (73), the driving part (26) of the third clutch (23) is connected with the main shaft (10), and the driven part (27) of the third clutch (23) is connected with the second central wheel (71),
the one-way clutch (24) being located on the second connecting cylinder (82), the first brake (31) being for braking the first ring gear (64), the second brake (32) being for braking the second centre wheel (71),
the power supply assembly (50) is connected with the first motor (41).
2. Hybrid system according to claim 1, characterized in that it further comprises a second electric machine (42) and a fourth clutch (25), the rotor of said second electric machine (42) being coaxially connected with said main shaft (10), said second electric machine (42) being located between said engine (1) and said first electric machine (41), said first clutch (21) being mounted on said main shaft (10), and said fourth clutch (25) being located between said first electric machine (41) and said second electric machine (42).
3. The hybrid system according to claim 2, wherein the power supply assembly (50) includes: a battery (51) and two inverters (52), one of the two inverters (52) being connected between the battery (51) and the first motor (41), the other of the two inverters (52) being connected between the battery (51) and the second motor (42).
4. A control method of a hybrid system for controlling the hybrid system according to claim 1, the control method comprising:
controlling the hybrid power system to operate in any one of power modes, wherein the power modes comprise a pure electric mode, a pure engine mode, a hybrid driving mode, an energy recovery mode and a parking power generation mode,
the hybrid power system further comprises a second motor and a fourth clutch, a rotor of the second motor is coaxially connected with the main shaft, the second motor is located between the engine and the first motor, the first clutch is mounted on the main shaft, and the fourth clutch is located between the first motor and the second motor.
5. The method of claim 4, wherein the hybrid system is controlled to operate in any one of power gears when the hybrid system is in the electric-only mode, the engine-only mode, the hybrid drive mode, or the energy recovery mode, the power gears including: the control method comprises the following steps of:
when the hybrid power systems are controlled to be switched to the first gear, the first clutch is controlled to be in a combined state, the second clutch and the third clutch are controlled to be in a separated state, the first brake is controlled to brake, and the second brake is controlled not to brake;
when the hybrid power systems are controlled to be switched to the second gear, the first clutch is controlled to be in a combined state, the second clutch and the third clutch are controlled to be in a separated state, the first brake is controlled not to brake, and the second brake is controlled to brake;
when the hybrid power systems are controlled to be switched to the third gear, the first clutch and the second clutch are controlled to be in a combined state, the third clutch is controlled to be in a separated state, and the first brake and the second brake are controlled not to brake;
when the hybrid power systems are controlled to be switched to the fourth gear, the first clutch and the third clutch are controlled to be in a separated state, the second clutch is controlled to be in a combined state, the first brake is controlled not to brake, and the second brake is controlled to brake;
and when the hybrid power system is controlled to be switched to the reverse gear, the first clutch and the second clutch are controlled to be in a separation state, the third clutch is controlled to be in a combination state, the first brake is controlled to brake, and the second brake is controlled not to brake.
6. The control method of the hybrid system according to claim 5, characterized in that when controlling the hybrid system to switch to the electric-only mode, the control method includes:
controlling the engine and the second motor not to work, controlling the fourth clutch to be in a separation state, and controlling the first motor to work;
or controlling the engine and the first motor not to work, controlling the fourth clutch to be in a combined state, and controlling the second motor to work.
7. The control method of a hybrid system according to claim 5, characterized in that when controlling the hybrid system to switch to the engine-only mode, the control method includes:
and controlling the first motor and the second motor not to work, controlling the fourth clutch to be in a combined state, and controlling the engine to work.
8. The control method of the hybrid system according to claim 5, characterized in that when controlling the hybrid system to switch to the hybrid drive mode, the control method includes:
controlling the first motor, the second motor and the engine to work, and controlling the fourth clutch to be in a combined state;
or the first motor and the engine are controlled to work, the fourth clutch is controlled to be in a combined state, and the second motor is controlled not to work;
or the second motor and the engine are controlled to work, the fourth clutch is controlled to be in a combined state, and the first motor is controlled not to work;
or controlling the engine to work, controlling the fourth clutch to be in a combined state, and controlling the engine to drive the first motor to generate power;
or controlling the engine to work, controlling the fourth clutch to be in a combined state, and controlling the engine to drive the second motor to generate power.
9. The control method of the hybrid system according to claim 5, characterized in that when controlling the hybrid system to switch to the energy recovery mode, the control method includes:
and controlling the engine and the second motor not to work, controlling the fourth clutch to be in a separation state, and controlling the first motor to generate power.
10. The control method of a hybrid system according to claim 5, characterized in that when controlling the hybrid system to switch to the parking power generation mode, the control method includes:
controlling the engine to work, controlling the first motor to stop working, controlling the fourth clutch to be in a separation state, and controlling the engine to drive the second motor to generate power;
or controlling the engine to work, controlling the second motor to stop working, controlling the fourth clutch to be in a combined state, controlling the first clutch to be in a separated state, and controlling the engine to drive the first motor to generate power.
CN202010451473.9A 2020-05-25 2020-05-25 Hybrid powertrain system and control method Active CN111619331B (en)

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CN112406507B (en) * 2020-10-29 2024-04-16 东风汽车集团有限公司 Hybrid power driving method and device, power system, vehicle and related equipment
CN113978237B (en) * 2021-10-22 2023-09-26 奇瑞汽车股份有限公司 Hybrid power system

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