CN107662485B - Hybrid power driving system - Google Patents

Hybrid power driving system Download PDF

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Publication number
CN107662485B
CN107662485B CN201710880409.0A CN201710880409A CN107662485B CN 107662485 B CN107662485 B CN 107662485B CN 201710880409 A CN201710880409 A CN 201710880409A CN 107662485 B CN107662485 B CN 107662485B
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China
Prior art keywords
clutch
motor
gear
engine
planetary gear
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CN201710880409.0A
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CN107662485A (en
Inventor
张恒先
王旭刚
周伟强
周之光
景枫
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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
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—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
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/44—Series-parallel type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Abstract

The invention discloses a hybrid power driving system, and belongs to the field of hybrid power automobiles. The hybrid drive system includes: the engine, first motor, second motor, first clutch, planetary gear train. The first motor and the second motor are electrically connected in parallel. The engine, the first clutch and the planetary gear train are in sequential transmission connection through a first transmission shaft. The first motor is sleeved on the first transmission shaft between the first clutch and the planetary gear train, is fixed on the automobile body of the automobile and is in transmission connection with the planetary gear train. The second motor is in transmission connection with the wheels. The planetary gear train is used for enabling the rotating speed of the engine and the rotating speed of the first motor to form a preset speed ratio. The system provided by the invention can reduce the oil consumption and save the cost, and through the design of the double motors, even if the power of the engine is insufficient due to the overlarge oil consumption of the automobile, the insufficient power can be supplemented through the second motor and further matched with the first motor to drive the wheels to rotate, so that the normal running of the automobile is ensured.

Description

Hybrid power driving system
Technical Field
The invention relates to the field of hybrid electric vehicles, in particular to a hybrid power driving system.
Background
The traditional automobile relies on burning fossil fuel (such as gasoline, diesel oil and the like) to provide power for an engine, and the exhaust gas of the traditional automobile can pollute the environment and does not meet the requirements of energy conservation and environmental protection. Therefore, it is necessary to provide power to an automobile by replacing fossil fuel with new pollution-free energy such as electric energy. However, the pure electric vehicle using electric energy as energy has short endurance mileage, and the supporting facilities are still incomplete, so that the travel requirements of people cannot be met. The fossil fuel and the electric energy are combined for use, so that the crisis of the fossil fuel can be relieved, and the defects of a pure electric vehicle can be overcome, therefore, the hybrid power driving system capable of utilizing the fossil fuel and the electric energy is very necessary.
The prior art provides a hybrid drive system comprising: the engine, clutch, speed change gear, motor. The engine is connected with the motor through a clutch which can be jointed or separated, the other end of the motor is connected with the input end of a speed change device, the output end of the speed change device is connected with a driving shaft of the automobile wheel, and the speed change device is used for transmitting power and automatically changing the transmission ratio. When the hybrid power driving system is applied, the hybrid power driving system can be in a hybrid power mode by adjusting the separation and connection states of the clutch, so that the hybrid use of fossil fuel and electric energy is ensured, and the energy utilization rate is improved. Specifically, when the hybrid power driving system is in a hybrid power mode, the clutch is engaged, and the engine and the motor jointly drive the automobile to run.
The inventor finds that the prior art has at least the following technical problems:
when an engine and a motor drive an automobile to run together, a clutch is engaged, and the rotating speed of the engine changes along with the change of the rotating speed of wheels, so that the engine cannot always work in a rotating speed area with the lowest oil consumption, the oil consumption of the automobile is increased, and the resource waste is caused. In addition, the increase of the fuel consumption of the automobile easily causes the power shortage of the engine, thereby influencing the normal running of the automobile.
Disclosure of Invention
In order to solve the above technical problem, an embodiment of the present invention provides a hybrid drive system. The specific technical scheme is as follows:
an embodiment of the present invention provides a hybrid drive system, including: an engine;
the system further comprises: the first motor and the second motor are electrically connected in parallel, and the first clutch and the planetary gear train are connected in parallel;
the engine, the first clutch and the planetary gear train are in sequential transmission connection through a first transmission shaft;
the first motor is sleeved on the first transmission shaft between the first clutch and the planetary gear train, is fixed on the automobile body of the automobile and is in transmission connection with the planetary gear train;
the second motor is in transmission connection with the wheels;
the planetary gear train is used for enabling the rotating speed of the engine and the rotating speed of the first motor to form a preset speed ratio.
Specifically, preferably, the hybrid drive system further includes: an inverter and a battery pack electrically connected;
the inverter is electrically connected to the first motor and the second motor.
Specifically, preferably, the planetary gear train includes: the planetary gear comprises a sun gear, a first planetary gear, a second planetary gear, a gear ring and a planetary gear carrier, wherein the first planetary gear and the second planetary gear are sequentially meshed with the outer gear teeth of the sun gear;
the sun wheel is sleeved at the end part of the first transmission shaft;
the gear ring is sleeved on the second transmission shaft and is in transmission connection with the wheels through the second transmission shaft, and a first locking clutch for realizing the connection or the separation of the gear ring and the body of the automobile is arranged between the gear ring and the body of the automobile;
the planet wheel carrier is sleeved on the first transmission shaft and is in transmission connection with the first motor, and a second locking clutch used for realizing the engagement or the separation of the planet wheel carrier and the automobile body of the automobile is arranged between the planet wheel carrier and the automobile body.
Specifically, preferably, the hybrid drive system further includes: the second clutch, the third clutch and the transmission gear;
the transmission gear and the third clutch are respectively sleeved at two ends of the second transmission shaft, and the transmission gear is in transmission connection with the second planet gear;
the second clutch is sleeved on the second transmission shaft, and the transmission gear, the second clutch and the third clutch are sequentially in transmission connection.
Specifically, preferably, the hybrid drive system further includes: and the brake is arranged on the first transmission shaft between the first clutch and the sun gear.
Specifically, preferably, the hybrid drive system further includes: a driving gear and a driven gear engaged with each other;
the driving gear is in transmission connection with the third clutch;
the driven gear is in transmission connection with the wheel.
Specifically, the operation modes of the system preferably include: electric only mode, engine only drive mode, hybrid drive mode, energy recovery mode.
Specifically, preferably, the electric-only mode includes: a single motor mode and a dual motor mode;
in the single-motor mode, the engine and the second motor do not work, the battery pack supplies power to the first motor, and the wheels are driven to rotate by the first motor;
the first locking clutch, the third clutch and the brake are engaged, and the first clutch, the second clutch and the second locking clutch are disengaged;
or the second locking clutch, the second clutch and the brake are engaged, and the first clutch, the third clutch and the first locking clutch are disengaged;
or the second clutch, the third clutch and the brake are engaged, and the first clutch, the first locking clutch and the second locking clutch are disengaged;
or in the single-motor mode, the engine and the first motor do not work, the first locking clutch, the third clutch, the first clutch, the second clutch, the brake and the second locking clutch are all separated, the battery pack supplies power to the second motor, and the wheels are driven to rotate by the second motor;
in the dual-motor mode, the engine is not operated, the first locking clutch and the third clutch are engaged, the first clutch, the second clutch, the brake and the second locking clutch are disengaged, the battery pack supplies power to the first motor and the second motor at the same time, and the wheels are driven to rotate by the first motor and the second motor together.
Specifically, preferably, in the engine-only drive mode, the first clutch, the third clutch, and the first lock-up clutch are engaged, and the second clutch, the brake, and the second lock-up clutch are disengaged;
or the first clutch, the second clutch and the second locking clutch are engaged, and the third clutch, the brake and the first locking clutch are disengaged;
or the first clutch, the second lock-up clutch, the third clutch are engaged, and the second clutch, the brake and the first lock-up clutch are disengaged;
the wheels are driven to rotate by the engine.
Specifically, it is preferable that, in the hybrid drive mode, the first clutch, the third clutch, and the first lock-up clutch are engaged, and the second clutch, the brake, and the second lock-up clutch are disengaged;
or the first clutch, the second clutch and the second locking clutch are engaged, and the third clutch, the brake and the first locking clutch are disengaged;
or the first clutch, the second locking clutch and the third clutch are engaged, and the second clutch, the brake and the first locking clutch are disengaged;
the wheel is driven to rotate by the engine, the first motor and the second motor together, or the wheel is driven to rotate by the engine and the first motor together, or the wheel is driven to rotate by the engine and the second motor together.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the hybrid power driving system provided by the embodiment of the invention is provided with the engine, the first motor, the second motor, the first clutch and the planetary gear train, wherein the engine, the first clutch and the planetary gear train are sequentially in transmission connection through the first transmission shaft, the first motor is in transmission connection with the planetary gear train, the second motor is in transmission connection with the wheels, and the engine, the first motor and the second motor can respectively or jointly drive the wheels to rotate. Because the planetary gear train enables the rotating speed of the engine and the rotating speed of the first motor to form a preset speed ratio, the engine can always work in a rotating speed area with the lowest oil consumption by continuously adjusting the rotating speed of the first motor, so that the oil consumption is reduced, and the cost is saved. Through the design of double motors, the first motor is sleeved on the first transmission shaft between the first clutch and the planetary gear train, when the engine, the first motor and the second motor drive the automobile to run together, even if the power of the engine is insufficient due to overlarge oil consumption of the automobile, the insufficient power can be supplemented through the second motor, and then the second motor is matched with the first motor to drive wheels to rotate, so that the normal running of the automobile is ensured. In addition, the first motor is sleeved on the first transmission shaft between the first clutch and the planetary gear train, so that the space in the automobile occupied by the first motor is reduced, and the integration design of the engine and the first motor is facilitated.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a hybrid drive system provided in an embodiment of the present invention;
FIG. 2 is a schematic energy transfer diagram of a hybrid drive system in an electric-only mode according to an embodiment of the present invention;
FIG. 3 is a schematic energy transfer diagram of a hybrid drive system in a pure engine drive mode according to an embodiment of the present invention;
FIG. 4 is a schematic energy transfer diagram of a hybrid drive system in a hybrid drive mode, according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of energy transfer of the hybrid drive system in an energy recovery mode according to an embodiment of the invention.
The reference numerals denote:
1 an engine of a vehicle, wherein the engine comprises a power unit,
2 a first motor for driving the motor to rotate,
3 a second motor for driving the motor to rotate,
4 a first clutch which is connected with the first clutch,
5 a planetary gear train,
501 a sun wheel of a sun wheel,
502 a first one of the planet wheels,
503 a second planet wheel which is provided with a second planet wheel,
504 the number of teeth of the ring gear,
505 of the planetary wheel carrier, and a planetary wheel carrier,
6 a first transmission shaft is arranged on the first transmission shaft,
7 an inverter for converting the voltage of the AC power supply into DC power,
8 of the battery pack, wherein the battery pack,
9 a first one-way clutch is provided,
10 a second lock-up clutch is provided,
11 a second clutch which is connected to the first clutch,
12 a third clutch which is connected with the first clutch,
13 the transmission gear is driven by the gear wheel,
14 a second drive shaft for the second drive shaft,
15 the brake is used for braking the motor,
16 the drive gear of the motor, 16,
17 a driven gear is driven by the driving gear,
and (4) X vehicle wheels.
In the drawings, arrows with broken lines indicate the direction of transmission of electric energy, and arrows with solid lines indicate the direction of transmission of mechanical energy.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
An embodiment of the present invention provides a hybrid drive system, as shown in fig. 1 to 5, including: the hybrid power system comprises an engine 1, a first motor 2, a second motor 3, a first clutch 4 and a planetary gear train 5. Wherein the first electric machine 2 and the second electric machine 3 are electrically connected in parallel. The engine 1, the first clutch 4 and the planetary gear train 5 are in sequential transmission connection through a first transmission shaft 6. The first motor 2 is sleeved on a first transmission shaft 6 between the first clutch 4 and the planetary gear train 5, is fixed on the automobile body of the automobile and is in transmission connection with the planetary gear train 5. The second motor 3 is in transmission connection with the wheel X. The planetary gear train 5 is used to set the rotation speed of the engine 1 and the rotation speed of the first motor 2 to a preset speed ratio.
The following explains the working principle of the hybrid drive system provided by the embodiment of the present invention:
the hybrid drive system can operate in a hybrid drive mode, specifically, in the hybrid drive mode, the first clutch 4 is engaged, the engine 1, the first motor 2 and/or the second motor 3 jointly output power, and the power is transmitted to the wheels X after passing through the planetary gear train 5 to drive the wheels X to rotate. In the process, the second motor 3 is used for complementing or increasing the driving force to the wheel X, that is, the second motor 3 can output power to the wheel and can rotate idly so as to meet the actual driving requirement of the automobile.
According to the hybrid power driving system provided by the embodiment of the invention, the engine 1, the first motor 2, the second motor 3, the first clutch 4 and the planetary gear train 5 are arranged, the engine 1, the first clutch 4 and the planetary gear train 5 are sequentially in transmission connection through the first transmission shaft 6, the first motor 2 is in transmission connection with the planetary gear train 5, the second motor 3 is in transmission connection with the wheel X, and the engine 1, the first motor 2 and the second motor 3 can respectively or jointly drive the wheel X to rotate. Because the planetary gear train 5 enables the rotating speed of the engine 1 and the rotating speed of the first motor 2 to form a preset speed ratio, the engine 1 can always work in a rotating speed area with the lowest oil consumption by continuously adjusting the rotating speed of the first motor 2, so that the oil consumption is reduced, and the cost is saved. Through the design of the double motors, the first motor 2 is sleeved on the first transmission shaft 6 between the first clutch 4 and the planetary gear train 5, when the engine 1, the first motor 2 and the second motor 3 drive the automobile to run together, even if the power of the engine 1 is insufficient due to overlarge oil consumption of the automobile, the insufficient power can be supplemented through the second motor 3, and then the first motor 2 is matched with the second motor to drive the wheel X to rotate, so that the normal running of the automobile is ensured. In addition, the first motor 2 is sleeved on the first transmission shaft 6 between the first clutch 4 and the planetary gear train 5, so that the space in the automobile occupied by the first motor 2 is reduced, and the integration design of the engine 1 and the first motor 2 is facilitated.
Wherein, the "preset speed ratio" means: the proportional relationship between the rotational speed of the engine 1 and the rotational speed of the first electric machine 2.
The first electric machine 2 is sleeved on the first transmission shaft 6 between the first clutch 4 and the planetary gear train 5, which means that the first transmission shaft 6 passes through the first electric machine 2, but the first transmission shaft 6 is not fixedly connected with the first electric machine 2, that is, the first transmission shaft 6 does not rotate along with the rotation of the first electric machine 2, and the sleeving of one component on the other component has the same meaning in the following description.
The number of the planetary gear trains 5 may be multiple, for example, several sets of planetary gear trains may be provided between the engine 1 and the planetary gear trains 5 or between the planetary gear trains 5 and the wheels X in the embodiment of the present invention.
In order to facilitate the supply of electric power to the first electric machine 2 and the second electric machine 3, as shown in fig. 1 to 5, the hybrid drive system further includes: an inverter 7 and a battery pack 8 electrically connected. The inverter 7 is electrically connected to the first motor 2 and the second motor 3. The battery pack 8 is used to supply the first and second electric machines 2 and 3 with electric energy, but the electric energy supplied by the battery pack 8 is generally direct current, which needs to be converted into alternating current by the inverter 7 to ensure the normal operation of the first and second electric machines 2 and 3. Meanwhile, the first motor 2 and the second motor 3 are electrically connected to the inverter 7, and the ac power output from the inverter 7 can supply electric power to the first motor 2 and the second motor 3. When the first motor 2 and the second motor 3 receive the mechanical energy, the mechanical energy can also be converted into electric energy, and the electric energy is transmitted to the inverter 7 and then stored in the battery pack 8 through the inverter 7, so that the recovery and storage of the energy are realized.
In the embodiment of the present invention, as shown in fig. 1 to 5, the planetary gear train 5 includes: the planetary gear set comprises a sun gear 501, a first planetary gear 502 and a second planetary gear 503 which are sequentially meshed with outer gear teeth of the sun gear 501, a gear ring 504 of which the inner gear teeth are meshed with the second planetary gear 503, and a planetary gear carrier 505 which is in transmission connection with the first planetary gear 502 and the second planetary gear 503. The sun gear 501 is fitted around the end of the first transmission shaft 6. The gear ring 504 is sleeved on the second transmission shaft 14 and is in transmission connection with the wheels X through the second transmission shaft 14, and a first locking clutch 9 for realizing the connection or disconnection of the gear ring 504 and the body of the automobile is arranged between the gear ring and the body of the automobile. The planet carrier 505 is sleeved on the first transmission shaft 6 and is in transmission coupling with the first motor 2, and a second locking clutch 10 for realizing the engagement or the separation of the planet carrier 505 and the automobile body is arranged between the planet carrier and the automobile body.
By arranging the sun gear 501, the first planet gear 502, the second planet gear 503, the gear ring 504, the planet gear carrier 505, the first lock-up clutch 9 and the second lock-up clutch 10, the first planet gear 502 and the second planet gear 503 are sequentially meshed with the external gear teeth of the sun gear 501, the internal gear teeth of the gear ring 504 are meshed with the second planet gear 503, the rotating speed of the engine 1 and the rotating speed of the first motor 2 form a preset speed ratio, and the rotating speed of the engine 1 is adjustable. And the preset speed ratio of the engine 1 and the first motor 2 can be adjusted, which is equivalent to increasing gears for the automobile and improving the service performance of the automobile.
Specifically, when the first lock-up clutch 9 is engaged and the second lock-up clutch 10 is disengaged, the ring gear 504 is locked, and the power transmitted by the engine 1 and the first electric machine 2 can be transmitted to the wheel X via the carrier 505 and the second planetary gear 503, in the process, the preset speed ratio of the engine 1 and the first electric machine 2 can be regarded as the first speed ratio, and can be regarded as the first gear of the automobile.
When the second lock-up clutch 10 is engaged and the first lock-up clutch 9 is disengaged, the carrier 505 is locked, and the power transmitted by the engine 1 can be transmitted to the wheels X via the sun gear 501, the first planetary gear 502, the second planetary gear 503, and the ring gear 504. Because the external gear teeth of the sun gear 501 are sequentially meshed with the first planet gear 502 and the second planet gear 503, and the planet gear carrier 505 is in a locking state, when the sun gear 501 rotates, the second planet gear 503 rotates and is consistent with the rotating direction of the sun gear 501, so that the rotating direction of the wheel X is consistent with the rotating direction of the sun gear 501 (namely the wheel X is consistent with the rotation direction of the engine 1), and the gear added for the automobile is not a reverse gear. In the process, the preset speed ratio of the engine 1 and the first electric machine 2 can be regarded as a second speed ratio, and in this case, can be regarded as a second gear of the vehicle.
Furthermore, the above-mentioned "preset speed ratio is adjustable" can be understood as: a transition between the first speed ratio and the second speed ratio. In addition, the first lock-up clutch 9 and the second lock-up clutch 10 can be simultaneously disengaged, at this time, neither the ring gear 504 nor the carrier 505 is in the locked state, and the power transmitted by the engine 1 and the first motor 2 can be directly transmitted to the wheels X, which is equivalent to a third gear of the automobile.
As shown in fig. 1 to 5, the hybrid drive system further includes: a second clutch 11, a third clutch 12 and a transmission gear 13. The transmission gear 13 and the third clutch 12 are respectively sleeved at two ends of the second transmission shaft 14, and the transmission gear 13 is in transmission connection with the second planet wheel 503. The second clutch 11 is sleeved on the second transmission shaft 14, and the transmission gear 13, the second clutch 11 and the third clutch 12 are in transmission connection in sequence.
By providing the transmission gear 13, the transmission coupling between the second planet gear 502 and the wheel X is facilitated. Through the arrangement, the automobile gear can be adjusted by only controlling the connection or the disconnection of the second clutch 11, the third clutch 12, the first locking clutch 9 and the second locking clutch 10 under different running modes of the hybrid power driving system, so that the requirements of the torque and the rotating speed of the hybrid power driving system under different running modes are met.
In order to ensure that the sun gear 501 is in a locked state when the first electric machine 2 alone provides power for the vehicle, and the vehicle can normally run, as shown in fig. 1 to 5, the hybrid drive system further includes: the brake 15 is provided on the first transmission shaft 6 between the first clutch 4 and the sun gear 501.
In an embodiment of the present invention, as shown in fig. 1 to 5, the hybrid drive system further includes: a driving gear 16 and a driven gear 17 engaged with each other. The driving gear 16 is in transmission connection with the third clutch 12. The driven gear 17 is in transmission connection with the wheel X. Through the arrangement, the transmission connection between the planetary gear train 5 and the wheel X is realized, and the normal power transmission between the planetary gear train 5 and the wheel X is ensured.
By adjusting the engaging or disengaging states of the first clutch 4, the second clutch 11, the third clutch 12, the first lock-up clutch 9 and the second lock-up clutch 10, the hybrid power driving system can be in different operation modes, and the hybrid power driving system is always in a state capable of efficiently utilizing energy through different operation modes, so that the energy consumption is reduced, the energy is saved, and the cost is reduced. Specifically, the operation modes of the system include: electric only mode, engine only drive mode, hybrid drive mode, energy recovery mode. Based on the above, in the above modes, the following three cases are: the second clutch 11 is engaged and the third clutch 12 is disengaged; the second clutch 11 is disengaged and the third clutch 12 is engaged; the second clutch 11 and the third clutch 12 are simultaneously separated, so that different gears of the automobile can be realized.
The pure electric mode only consumes electric energy and provides power for the automobile through the first motor 2 and the second motor 3. The pure electric mode includes: single motor mode and dual motor mode.
The single motor mode is to provide power for the vehicle by only one motor. In the single-motor mode, when the first motor 2 works alone, the engine 1 and the second motor 3 do not work, and the wheel X is driven to rotate by the first motor 2, at this time, the first motor 2 has 3 gears, which is as follows:
as shown in fig. 2, when the first electric machine 2 is in 1 st gear, the first lock-up clutch 9, the third clutch 12, and the brake 15 are engaged, and the first clutch 4, the second clutch 11, and the second lock-up clutch 10 are disengaged. The battery pack 8 discharges, the inverter 7 converts direct current discharged from the battery pack 8 into alternating current, the alternating current is transmitted to the first motor 2, the first motor 2 converts electric energy into mechanical energy, the mechanical energy is transmitted to the driven gear 17 after sequentially passing through the planet carrier 505, the second planet wheel 503, the transmission gear 13, the second transmission shaft 14, the third clutch 12 and the driving gear 16, and the driven gear 17 drives the wheel X to rotate through the transmission shaft.
When the first electric machine 2 is in the 2-speed gear, the second lock-up clutch 10, the second clutch 11, and the brake 15 are engaged, the first clutch 4, the third clutch 12 are disengaged, and the first lock-up clutch 9 is disengaged. The battery pack 8 discharges, the inverter 7 converts direct current discharged from the battery pack 8 into alternating current, the alternating current is transmitted to the first motor 2, the first motor 2 converts electric energy into mechanical energy, the mechanical energy is transmitted to the driven gear 17 after sequentially passing through the planet carrier 505, the second planet wheel 503, the ring gear 504, the second clutch 11 and the driving gear 16, and the driven gear 17 drives the wheel X to rotate through the transmission shaft.
When the first electric machine 2 is in 3 th gear, the second clutch 11, the third clutch 12, and the brake 15 are engaged, and the first clutch 4, the first lock-up clutch 9, and the second lock-up clutch 10 are disengaged. The battery pack 8 discharges, the dc power discharged from the battery pack 8 is converted into ac power by the inverter 7, the ac power is transmitted to the first motor 2, the electric energy is converted into mechanical energy by the first motor 2, the mechanical energy is transmitted to the drive gear 16 through the carrier 505, the second planetary gear 503, the ring gear 504, and the second clutch 11 in this order, and the mechanical energy is also transmitted to the drive gear 16 through the carrier 505, the second planetary gear 503, the transmission gear 13, the second transmission shaft 14, and the third clutch 12. At this time, the mechanical energy transmitted to the driving gear 16 is transmitted to the wheel X through the driven gear 17, thereby rotating the wheel X.
When the second motor 3 works alone, the engine 1 and the first motor 2 do not work, the first lock clutch 9, the third clutch 12, the first clutch 4, the second clutch 11, the brake 15 and the second lock clutch 10 are all separated, the battery pack 8 discharges, direct current discharged from the battery pack 8 is converted into alternating current through the inverter 7, the alternating current is transmitted to the second motor 3, electric energy is converted into mechanical energy through the second motor 3, the mechanical energy is transmitted to the driven gear 17 through another driving gear meshed with the driven gear 17, and then the driven gear 17 drives the wheel X to rotate through the transmission shaft.
In the dual motor mode, the engine 1 is not operated, the first and third lock clutches 9 and 12 are engaged, the first clutch 4, the second clutch 11, the brake 15, and the second lock clutch 10 are disengaged, the battery pack 8 is discharged, direct current discharged from the battery pack 8 is converted into alternating current by the inverter 7, and the alternating current is transmitted to the first and second motors 2 and 3. The electric energy is converted into mechanical energy through the first motor 2 and the second motor 3, the mechanical energy transmitted by the first motor 2 is transmitted to the driven gear 17 after the planet carrier 505, the second planet wheel 503, the transmission gear 13, the second transmission shaft 14, the third clutch 12 and the driving gear 16 are transmitted, meanwhile, the mechanical energy transmitted by the second motor 3 is transmitted to the driven gear 17 through another driving gear engaged with the driven gear 17, and the driven gear 17 drives the wheel X to rotate through the transmission shaft. In this mode, the first electric machine 2 has 3 gears and its energy transfer path is the same as that of the first electric machine 2 in the single-motor mode described above.
The engine only drive mode is to power the vehicle only via the engine 1. When the automobile is cruising at a high speed, the engine 1 directly drives the automobile to move, so that the oil consumption of the automobile is reduced, and the operation mode is not limited by the electric quantity of the battery pack 8.
In the pure electric mode, the first electric machine 2 and the second electric machine 3 do not work, the engine 1 provides power for the wheel X, and the engine 1 has 3 gears, as follows:
as shown in fig. 3, when the engine 1 is in 1 st gear, the first clutch 4, the third clutch 12, and the first lock clutch 9 are engaged; the second clutch 11, the brake 15, and the second lock-up clutch 10 are disengaged. The engine 1 outputs power, so that the power is transmitted to the driven gear 17 through the first transmission shaft 6, the sun gear 501, the first planet gear 502, the second planet gear 503, the transmission gear 13, the second transmission shaft 14, the third clutch 12 and the driving gear 16, and then the driven gear 17 drives the wheel X to rotate through the transmission shaft.
When the engine 1 is in the 2 nd gear, the first clutch 4, the second clutch 11, and the second lock-up clutch 10 are engaged, and the third clutch 12, the brake 15, and the first lock-up clutch 9 are disengaged. The engine 1 outputs power, so that the power is transmitted to the driven gear 17 through the first transmission shaft 6, the sun gear 501, the first planet gear 502, the second planet gear 503, the ring gear 504, the second clutch 11 and the driving gear 16, and the driven gear 17 drives the wheel X to rotate through the transmission shaft.
When the engine 1 is in 3 th gear, the first clutch 4, the second clutch 11, and the third clutch 12 are engaged, and the brake 15, the first lock-up clutch 9, and the second lock-up clutch 10 are disengaged. The engine 1 outputs power, and the power is transmitted to the driving gear 16 through the first transmission shaft 6, the sun gear 501, the first planet gear 502, the second planet gear 503, the ring gear 504, and the second clutch 11, and is also transmitted to the driving gear 16 through the transmission gear 13, the second transmission shaft 14, and the third clutch 12. At this time, the power transmitted to the driving gear 16 is transmitted to the wheel X through the driven gear 17, thereby rotating the wheel X.
In the hybrid driving mode, the wheel X is driven to rotate by the engine 1, the first motor 2 and the second motor 3 together, or the wheel X is driven to rotate by the engine 1 and the first motor 2 together, or the wheel X is driven to rotate by the engine 1 and the second motor 3 together. The engine 1 and the first electric machine 2 have 3 gears, as follows:
as shown in fig. 4, when the engine 1 and the first electric machine 2 are in 1 st gear, the first clutch 4, the third clutch 12, and the first lock clutch 9 are engaged; the second clutch 11, the brake 15, and the second lock-up clutch 10 are disengaged. The engine 1 outputs power, and transmits the power to the sun gear 501, the first planet gear 402 and the second planet gear 403, at the same time, the battery pack 8 discharges, the dc power discharged from the battery pack 8 is converted into ac power by the inverter 7, and the ac power is transmitted to the first motor 2 and/or the second motor 3, the electric energy is converted into mechanical energy by the first motor 2 and/or the second motor 3, so that the mechanical energy converted by the first motor 2 is transmitted to the second planet gear 403 after passing through the planet carrier 505, the power output by the engine 1 and the mechanical energy output by the first motor 2 are coupled at the second planet gear 403 and are output to the driven gear 17 after passing through the transmission gear 13 and the driving gear 16, and further the driven gear 17 drives the wheel X to rotate through the transmission shaft. In this process, the second motor 3 may also determine whether to transmit the mechanical energy output by the second motor to the driven gear 17 according to the actual working condition, so that the driven gear 17 drives the wheel X to rotate through the transmission shaft. When the second motor 3 and the engine 1 are driven in a hybrid manner, the first motor 2 is simply stopped.
When the engine 1 and the first electric machine 2 are in the 2-speed gear, the first clutch 4, the second clutch 11, and the second lock-up clutch 10 are engaged, and the third clutch 12, the brake 15, and the first lock-up clutch 9 are disengaged. When the engine 1 and the first electric machine 2 are in 3-speed gear, the first clutch 4 and the third clutch 12 are engaged, and the second clutch 11, the brake 15, the first lock-up clutch 9, and the second lock-up clutch 10 are disengaged.
When the engine 1 and the first electric machine 2 are in the 2 nd gear and the 3 rd gear, the energy transmission paths of the engine 1 and the first electric machine 2 can refer to the energy transmission paths of the engine 1 and the first electric machine 2 in the electric-only mode and the engine-only mode.
Based on the above, in the hybrid driving mode, the engine 1, the first motor 2 and/or the second motor 3 can jointly drive the automobile to run, so that the power performance of the automobile is improved. Moreover, by coupling the power output by the engine 1 and the mechanical energy output by the first electric machine 2 at the second planet wheels 403, the power between the first electric machine 2 and the engine 1 can be supplemented with each other to ensure that the engine 1 operates in an optimal fuel region (the optimal fuel region refers to a region providing the maximum power with the lowest fuel consumption). For the mutual power supplement between the first electric machine 2 and the engine 1, for example, when the power output of the engine 1 is insufficient or too high, the first electric machine 2 may be made to supplement the insufficient power, or the surplus power may be converted into electric energy to charge the battery pack 8.
In the energy recovery mode, namely when the automobile slides or brakes, the mechanical energy generated by the rotation of the wheels X is converted into electric energy (namely alternating current) through the first motor 2 and/or the second motor 3, and the alternating current is converted into direct current through the inverter 7 to charge the battery pack 8, so that the energy recovery is realized, and the oil saving rate is improved.
In the energy recovery mode, as shown in fig. 5, the engine 1 is not operated, and when the first electric machine 2 is in 1 st gear, the third clutch 12, the brake 15, and the first lock clutch 9 are engaged; the first clutch 4, the second clutch 11, and the second lock-up clutch 10 are disengaged. The first electric machine 2 and the second electric machine 3 can perform energy recovery separately or simultaneously. When the first electric machine 2 is in the 2 nd gear and the 3 rd gear, the energy transmission path is the same as that of the first electric machine 2 in the pure electric machine mode, and the transmission direction is opposite.
When energy is recovered by the first electric machine 2, mechanical energy generated by the vehicle during sliding or braking is transmitted from the wheel X to the first electric machine 2 after passing through the driven gear 17, the driving gear 16, the third clutch 12, the second transmission shaft 14, the transmission gear 13, the second planetary gear 403, and the planetary carrier 505 in sequence, the mechanical energy is converted into electric energy (i.e., alternating current) by the first electric machine 2, and the alternating current is converted into direct current by the inverter 7 to charge the battery pack 8.
When energy is recovered by the second electric machine 3, mechanical energy generated when the automobile is coasting or braking is transmitted from the wheels X to the second electric machine 3 through the driven gear 17, the mechanical energy is converted into electric energy (i.e., alternating current) by the second electric machine 3, and the alternating current is converted into direct current by the inverter 7 to charge the battery pack 8.
When energy recovery is carried out jointly through the first motor 2 and the second motor 3, mechanical energy generated when the automobile slides or brakes is only required to be transmitted to the first motor 2 and the second motor 3 simultaneously, then the mechanical energy is converted into electric energy (namely alternating current) through the first motor 2 and the second motor 3 respectively, the alternating current is converted into direct current through the inverter 7, and the battery pack 8 is charged.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (8)

1. A hybrid drive system comprising: an engine (1);
characterized in that the system further comprises: a first motor (2) and a second motor (3) which are electrically connected in parallel, a first clutch (4) and a planetary gear train (5);
the engine (1), the first clutch (4) and the planetary gear train (5) are sequentially in transmission connection through a first transmission shaft (6);
the first motor (2) is sleeved on the first transmission shaft (6) between the first clutch (4) and the planetary gear train (5), is fixed on the automobile body of the automobile and is in transmission connection with the planetary gear train (5);
the second motor (3) is in transmission connection with a wheel (X);
the planetary gear train (5) is used for enabling the rotating speed of the engine (1) and the rotating speed of the first motor (2) to form a preset speed ratio, and the planetary gear train (5) comprises: the planetary gear set comprises a sun gear (501), a first planetary gear (502) and a second planetary gear (503) which are sequentially meshed with outer gear teeth of the sun gear (501), a gear ring (504) of which the inner gear teeth are meshed with the second planetary gear (503), and a planetary gear carrier (505) in transmission connection with the first planetary gear (502) and the second planetary gear (503); the sun wheel (501) is sleeved at the end part of the first transmission shaft (6); the gear ring (504) is sleeved on a second transmission shaft (14) and is in transmission connection with the wheels (X) through the second transmission shaft (14), and a first locking clutch (9) for realizing the engagement or the disengagement of the gear ring (504) and the body of the automobile is arranged between the gear ring and the body of the automobile; the planet carrier (505) is sleeved on the first transmission shaft (6) and is in transmission coupling with the first motor (2), and a second locking clutch (10) for realizing engagement or separation of the planet carrier (505) and the automobile body is arranged between the planet carrier and the automobile body;
the hybrid drive system further includes: an inverter (7) and a battery pack (8) which are electrically connected;
the operation modes of the system comprise an energy recovery mode, in which the engine (1) is not operated, when energy recovery is carried out jointly by the first electric machine (2) and the second electric machine (3), mechanical energy generated by the vehicle during sliding or braking is simultaneously transmitted to the first electric machine (2) and the second electric machine (3), then the mechanical energy is converted into alternating current by the first electric machine (2) and the second electric machine (3), and the alternating current is converted into direct current by the inverter (7) to charge the battery pack (8);
the hybrid drive system further includes: a second clutch (11), a third clutch (12) and a transmission gear (13);
the transmission gear (13) and the third clutch (12) are respectively sleeved at two ends of a second transmission shaft (14), and the transmission gear (13) is in transmission connection with the second planet gear (503);
the second clutch (11) is sleeved on the second transmission shaft (14), and the transmission gear (13), the second clutch (11) and the third clutch (12) are in transmission connection in sequence.
2. The system according to claim 1, characterized in that the inverter (7) is electrically connected with the first electric machine (2) and the second electric machine (3).
3. The system of claim 1, wherein the hybrid drive system further comprises: a brake (15) arranged on the first transmission shaft (6) between the first clutch (4) and the sun gear (501).
4. The system of claim 3, wherein the hybrid drive system further comprises: a driving gear (16) and a driven gear (17) which are meshed with each other;
the driving gear (16) is in transmission connection with the third clutch (12);
the driven gear (17) is in transmission connection with the wheel (X).
5. The hybrid drive system of claim 4, wherein the operating modes of the system further comprise: electric only mode, engine only drive mode, hybrid drive mode.
6. The system of claim 5, wherein the electric-only mode comprises: a single motor mode and a dual motor mode;
in the single-motor mode, the engine (1) and the second motor (3) are not operated, the battery pack (8) supplies power to the first motor (2), and the wheels (X) are driven to rotate by the first motor (2);
the first locking clutch (9) and the third clutch (12), the brake (15) are engaged, and the first clutch (4), the second clutch (11), the second locking clutch (10) are disengaged;
or the second locking clutch (10), the second clutch (11) and the brake (15) are engaged, and the first clutch (4), the third clutch (12) and the first locking clutch (9) are disengaged;
or the second clutch (11), the third clutch (12) and the brake (15) are engaged, and the first clutch (4), the first locking clutch (9) and the second locking clutch (10) are disengaged;
or, in the single-motor mode, the engine (1) and the first motor (2) do not work, the first locking clutch (9), the third clutch (12), the first clutch (4), the second clutch (11), the brake (15) and the second locking clutch (10) are all separated, the battery pack (8) supplies power to the second motor (3), and the wheels (X) are driven to rotate by the second motor (3);
in the dual-motor mode, the engine (1) does not work, the first locking clutch (9) and the third clutch (12) are connected, the first clutch (4), the second clutch (11), the brake (15) and the second locking clutch (10) are separated, the battery pack (8) supplies power to the first motor (2) and the second motor (3) at the same time, and the wheels (X) are driven to rotate together by the first motor (2) and the second motor (3).
7. The system according to claim 5, characterized in that in the engine-only driving mode the first clutch (4), the third clutch (12), the first lock-up clutch (9) are engaged, the second clutch (11), the brake (15), the second lock-up clutch (10) are disengaged;
or the first clutch (4), the second clutch (11) and the second locking clutch (10) are engaged, and the third clutch (12), the brake (15) and the first locking clutch (9) are disengaged;
or the first clutch (4), the second clutch (11) and the third clutch (12) are engaged, and the second clutch (11), the brake (15), the first locking clutch (9) and the second locking clutch (10) are disengaged;
the wheel (X) is driven to rotate by the engine (1).
8. System according to claim 5, characterized in that in the hybrid drive mode the first clutch (4), the third clutch (12), the first lock-up clutch (9) are engaged, the second clutch (11), the brake (15), the second lock-up clutch (10) are disengaged;
or the first clutch (4), the second clutch (11) and the second locking clutch (10) are engaged, and the third clutch (12), the brake (15) and the first locking clutch (9) are disengaged;
or the first clutch (4), the second clutch (11) and the third clutch (12) are engaged, and the brake (15), the first locking clutch (9) and the second locking clutch (10) are disengaged;
the wheel (X) is driven to rotate by the engine (1), the first motor (2) and the second motor (3) together, or the wheel (X) is driven to rotate by the engine (1) and the first motor (2) together, or the wheel (X) is driven to rotate by the engine (1) and the second motor (3) together.
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