Longitudinal dual-motor hybrid power system, vehicle and control method of vehicle

Abstract

The invention provides a longitudinally-arranged dual-motor hybrid power system which comprises an engine, a first transmission shaft, a first motor, a second motor, a second transmission shaft and a third transmission shaft, the centers of the first transmission shaft, the first motor, the second motor, the second transmission shaft and the third transmission shaft are located on the same axis, and a fourth transmission shaft and a fifth transmission shaft are located on the same side of the axis and parallel to the axis; the engine is connected with the first motor through the first transmission shaft which is connected with the clutch. The clutch is sleeved with the second motor, arranged between the first transmission shaft and the second transmission shaft and connected with the second transmission shaft; the third transmission shaft sleeves the second transmission shaft and is connected with the clutch; the gear set is arranged on the same side of the axis close to the fourth transmission shaft; the fourth transmission shaft is connected with the gear set, and the second transmission shaft and the third transmission shaft transmit power to the fifth transmission shaft through the gear set and the fourth transmission shaft; and the fifth transmission shaft transmits power to wheels.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a longitudinal dual-motor hybrid power system, a vehicle, and a control method for the vehicle. Background Art

[0002] Currently, the dual-motor hybrid solutions for vehicle drive systems on the market are mostly arranged horizontally on the vehicle. Due to the limited lateral space of the vehicle, these solutions are often very compact, which increases the difficulty of corresponding component design and production, limits the torque increase space, leads to poor handling performance, and makes the transmission system more complex and the transmission efficiency relatively low. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a longitudinal dual-motor hybrid system, a vehicle and a control method for the vehicle, which are used to save vehicle axial space, improve power transmission efficiency, achieve diversified driving modes with a simpler structure and reduce energy consumption.

[0004] In a first aspect, an embodiment of the present application provides a longitudinal dual-motor hybrid power system, including: an engine, a first motor, a second motor, a first transmission shaft, a second transmission shaft, a third transmission shaft, a clutch, a gear set, a fourth transmission shaft, and a fifth transmission shaft; the centers of the engine, the first transmission shaft, the first motor, the second motor, the second transmission shaft, and the third transmission shaft are located on the same axis, and the fourth transmission shaft and the fifth transmission shaft are located on the same side of the axis and are parallel to the axis; the engine is connected to the first motor through the first transmission shaft, the rotor of the first motor is mounted on the first transmission shaft, and the first transmission shaft is connected to the clutch; the first Two motors are mounted on the clutch, the clutch is arranged between the first transmission shaft and the second transmission shaft, and the clutch is connected to the second transmission shaft; the third transmission shaft is mounted on the second transmission shaft and is connected to the clutch; the gear set is arranged on the same side of the axis close to the fourth transmission shaft, and is connected to the second transmission shaft and the third transmission shaft; the fourth transmission shaft is connected to the gear set, the second transmission shaft transmits power to the fifth transmission shaft through the gear set and the fourth transmission shaft, and the third transmission shaft transmits power to the fifth transmission shaft through the gear set and the fourth transmission shaft; the fifth transmission shaft transmits the power to the wheels.

[0005] In the above scheme, the generator, the first motor and the second motor are coaxially arranged longitudinally, which can save the vehicle's axial space to the maximum extent, reduce the pressure of corresponding component design and production, and create conditions for the layout of complex suspension systems. Furthermore, these suspension systems can better balance the front and rear weights of the vehicle, improve the vehicle's handling stability and comfort, and, through the simpler and more direct structural arrangement of the drive shaft and the gear set and the coordination of the two, it is possible to use fewer transmission elements to achieve diversified drive modes and improve transmission efficiency. Moreover, the first motor and the second motor can both be used as generators or drive motors, or both can not participate in the drive. The flexible speed regulation of the generator, the first motor and the second motor can achieve a greater reduction in fuel consumption while ensuring the wheel-end power demand, which is more economical and energy-saving.

[0006] As an optional method, the clutch includes: a clutch active end, a clutch first driven end and a clutch second driven end; the first transmission shaft is connected to the clutch first driven end, and the engine and the first motor can be selectively connected or disconnected with the second motor through the clutch first driven end; the third transmission shaft is connected to the clutch second driven end, and the third transmission shaft can be selectively connected or disconnected with the second motor through the clutch second driven end. In the above scheme, by controlling the disconnection and engagement of the clutch first driven end and the clutch second driven end, the generator, the first motor and the second motor can be selectively connected to the second transmission shaft or the third transmission shaft, so as to realize a variety of motor and engine coupling methods, and then the power transmission route can be selected, and there are more flexible drive mode options when dealing with different working conditions, so as to achieve better power and economy.

[0007] As an optional manner, the gear set includes a first gear pair, a second gear pair, a third gear pair, and a fourth gear pair; the first gear pair includes a first gear pair driving gear and a first gear pair driven gear, the first gear pair driving gear is connected to the third transmission shaft, the first gear pair driven gear is meshed with the first gear pair driving gear, and the first gear pair driven gear is loosely sleeved on the fourth transmission shaft; the second gear pair includes a second gear pair driving gear and a second gear pair driven gear, the second gear pair driving gear is connected to the second transmission shaft, the second gear pair driven gear is meshed with the second gear pair driving gear The driving gears are meshed with each other, and the driven gear of the second gear pair is loosely mounted on the fourth transmission shaft; the third gear pair includes a third gear pair driving gear and a third gear pair driven gear, the third gear pair driving gear is connected to the second transmission shaft, the third gear pair driven gear is meshed with the third gear pair driving gear, and the third gear pair driven gear is loosely mounted on the fourth transmission shaft; the fourth gear pair includes the second gear pair driven gear and the fourth gear pair driven gear, the second gear pair driven gear is meshed with the fourth gear pair driven gear, and the fourth gear pair driven gear is loosely mounted on the fifth transmission shaft.

[0008] In the above scheme, the gear set is provided with four sets of gear pairs, and the layout design of parallel and longitudinal arrangement between the transmission shafts, combined with the four sets of gear pairs, uses fewer transmission elements, reduces the conversion of transmission direction, reduces the energy loss in the power transmission process, and thus improves the power transmission efficiency. Among them, three sets of gear pairs provide three speed ratio driving modes, which always control the vehicle in the most economical working mode and achieve a greater reduction in fuel consumption.

[0009] As an optional method, it further includes: a synchronizer; the synchronizer is arranged on the second transmission shaft between the second gear pair and the third gear pair, and is used to connect the second transmission shaft with the second gear pair driving gear or the third gear pair driving gear. In the above scheme, by adjusting the position of the synchronizer, the second gear pair can be selected as the power transmission route or the third gear pair can be selected as the power transmission route, so as to realize switching different gears according to the power and driving conditions of the vehicle.

[0010] In a second aspect, the present application provides a vehicle, comprising a power battery and the longitudinal dual-motor hybrid system described in the first aspect, wherein the power battery is electrically connected to the longitudinal dual-motor hybrid system, and the power battery is used to store electricity generated by the longitudinal dual-motor hybrid system.

[0011] In a third aspect, the present application provides a vehicle control method, the control method is used to control the vehicle described in the second aspect, the method comprising: obtaining driving mode information and gear information of the vehicle, wherein the driving mode information includes at least one of the following: pure electric driving mode, series mode, engine direct drive mode, parallel power generation mode, parallel discharge mode, braking energy recovery mode, parking power generation mode, and the gear information includes at least one of the following gears: first gear, second gear, third gear; based on the driving mode information and the gear information, a control strategy set is generated, the control strategy set is used to control at least one of the engine, the first motor, and the second motor to be in a working or non-working state, and to control a target component to be in a target working state, wherein the target component at least includes a clutch.

[0012] As an optional manner, the control strategy set is generated according to the driving mode information and the gear information, including: if the driving mode information is a pure electric driving mode and the gear information is a first gear, a first target control strategy in the control strategy set is generated, the first target control strategy is used to control the engine to be in a non-working state, the first motor to be in a non-working state, the second motor to be in a working state, and to control the first driven end of the clutch to be disconnected, the second driven end of the clutch to be disconnected, and the synchronizer to be connected with the second gear pair driving gear, the second motor converts the electric energy provided by the power battery into driving force and transmits it to the second transmission shaft, the second gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; if the driving mode information is a pure electric driving mode and the gear information is a second gear, a second target control strategy in the control strategy set is generated, the second target control strategy is used to control the engine to be in a non-working state, the first motor to be in a non-working state, the second motor to be in a non-working state, the first motor is in a non-working state, the first motor is in a non-working state, the second motor is in a working state, and the first driven end of the clutch is disconnected, the second driven end of the clutch is disconnected, and the synchronizer is connected to the third gear pair driving gear, the second motor converts the electric energy provided by the power battery into a driving force and transmits it to the second transmission shaft, the third gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; if the driving mode information is a pure electric driving mode, and the gear information is a third gear, a third target control strategy in the control strategy set is generated, and the third target control strategy is used to control the engine to be in a non-working state, the first motor to be in a non-working state, and the second motor to be in a working state, and control the first driven end of the clutch to be disconnected, the second driven end of the clutch to be engaged, the second motor converts the electric energy provided by the power battery into a driving force and transmits it to the third transmission shaft, the first gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels.

[0013] In the above scheme, the pure electric drive mode is suitable for vehicle starting, low-speed driving conditions, and the power battery is fully charged. In this mode, the generator and the first motor do not participate in the drive. The second motor converts the electrical energy of the power battery into driving force to supply the vehicle. By switching the power transmission route of the drive shaft and the gear set, the pure electric drive mode can provide three speed ratios.

[0014] As an optional manner, the control strategy set is generated according to the driving mode information and the gear information, including: if the driving mode information is a series mode and the gear information is a first gear, a first target control strategy in the control strategy set is generated, the first target control strategy is used to control the driving force of the engine to be transmitted to the first motor, the first motor converts the driving force into electrical energy, and controls the first driven end of the clutch to be disconnected, the second driven end of the clutch to be disconnected, and the synchronizer to be connected with the second gear pair driving gear, the second motor converts the electrical energy into driving force and transmits it to the second transmission shaft, the second gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; if the driving mode information is a series mode and the gear information is a second gear, a second target control strategy in the control strategy set is generated, the second target control strategy is used to control the driving force of the engine to be transmitted to the first motor, the first motor converts the driving force into electrical energy, and controls the first driven end of the clutch to be disconnected, the second driven end of the clutch to be disconnected, and the synchronizer to be connected with the second gear pair driving gear, the second motor converts the electrical energy into driving force and transmits it to the second transmission shaft, the second gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels. The driving force is converted into electric energy, and the first driven end of the clutch is controlled to be disconnected, the second driven end of the clutch is controlled to be disconnected, and the synchronizer is connected to the third gear pair driving gear, the second motor converts the electric energy into driving force and transmits it to the second transmission shaft, the third gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; if the driving mode information is the series mode and the gear information is the third gear, a third target control strategy in the control strategy set is generated, and the third target control strategy is used to control the driving force of the engine to be transmitted to the first motor, the first motor converts the driving force into electric energy, and the first driven end of the clutch is controlled to be disconnected, the second driven end of the clutch is engaged, the second motor converts the electric energy into driving force and transmits it to the third transmission shaft, the first gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels.

[0015] In the above scheme, the series mode is suitable for the vehicle's low-speed driving condition and the battery feeding state. In this mode, the engine transmits the driving force to the first motor, and the first motor is used as a generator to convert the engine's driving force into electrical energy. Then, according to the driving power required for the vehicle's driving, it is determined whether part or all of the electrical energy converted by the first motor will be provided to the second motor for driving the vehicle. By switching the power transmission route of the drive shaft and the gear set, the series mode can provide three speed ratios.

[0016] As an optional manner, the control strategy set is generated according to the driving mode information and the gear information, including: if the driving mode information is the engine direct drive mode, and the gear information is the first gear, a first target control strategy in the control strategy set is generated, the first target control strategy is used to control the engine to be in a working state, the first motor does not work when driven by the engine, and the first driven end of the clutch is engaged, the second driven end of the clutch is disconnected, and the synchronizer is connected to the second gear pair driving gear, the driving force of the engine is transmitted to the second transmission shaft, the second gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; if the driving mode information is the engine direct drive mode, and the gear information is the second gear, a second target control strategy in the control strategy set is generated, the second target control strategy is used to control the engine to be in a working state, the first motor is in the The engine rotates and does not work, and the first driven end of the clutch is controlled to engage, the second driven end of the clutch is disconnected, and the synchronizer is connected to the driving gear of the third gear pair, the driving force of the engine is transmitted to the second transmission shaft, the second gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; if the driving mode information is the engine direct drive mode, and the gear information is the third gear, a third target control strategy in the control strategy set is generated, and the third target control strategy is used to control the engine to be in a working state, the first motor rotates and does not work when driven by the engine, and the first driven end of the clutch is controlled to engage, the second driven end of the clutch is engaged, the driving force of the engine is transmitted to the third transmission shaft, the first gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels.

[0017] In the above scheme, the engine direct drive mode is suitable for high-speed driving conditions of the vehicle. In this mode, the first motor and the second motor do not participate in the driving, and the driving force of the engine is directly transmitted to the second transmission shaft or the third transmission shaft to drive the vehicle. By switching the power transmission route of the transmission shaft and the gear set, the engine direct drive mode can provide three speed ratios.

[0018] As an optional manner, the control strategy set is generated according to the driving mode information and the gear information, including: if the driving mode information is a parallel power generation mode and the gear information is a first gear, a first target control strategy in the control strategy set is generated, the first target control strategy is used to control the clutch to engage, the engine to be connected to the first motor and / or the second motor, the first motor and / or the second motor to be used as a generator, and to control the first driven end of the clutch to engage, the second driven end of the clutch to be disconnected, and the synchronizer to be connected to the second gear pair driving gear, the driving force of the engine is transmitted to the second transmission shaft, the second gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; if the driving mode information is a parallel power generation mode and the gear information is a second gear, a second target control strategy in the control strategy set is generated, the second target control strategy is used to control the clutch to engage, the engine to be connected to the first motor and / or the second motor , the first motor and / or the second motor are used as generators, and the first driven end of the clutch is controlled to be engaged, the second driven end of the clutch is disconnected, and the synchronizer is connected to the third gear pair driving gear, the driving force of the engine is transmitted to the second transmission shaft, the third gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; if the driving mode information is the parallel power generation mode, and the gear information is the third gear, a third target control strategy in the control strategy set is generated, and the third target control strategy is used to control the clutch to engage, the engine is connected to the first motor and / or the second motor, the first motor and / or the second motor are used as generators, and the first driven end of the clutch is controlled to be engaged, the second driven end of the clutch is engaged, the driving force of the engine is transmitted to the third transmission shaft, the first gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels.

[0019] In the above scheme, in the parallel power generation mode, the driving force of the engine is directly transmitted to the second transmission shaft or the third transmission shaft to provide power for the vehicle. At the same time, according to the power demand of the whole vehicle, the first motor and / or the second motor is used as a generator, and the driving force of the engine is used to charge the power battery. By switching the power transmission route of the transmission shaft and the gear set to select different speed ratios, the power generation efficiency is greatly improved.

[0020] As an optional manner, the control strategy set is generated according to the driving mode information and the gear information, including: if the driving mode information is a parallel discharge mode and the gear information is a first gear, a first target control strategy in the control strategy set is generated, the first target control strategy is used to control the first motor and / or the second motor as a drive motor, and control the first driven end of the clutch to engage, the second driven end of the clutch to disconnect, and the synchronizer to be connected to the second gear pair driving gear, the driving force of the engine, the first motor and / or the second motor is transmitted to the second transmission shaft, the second gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; if the driving mode information is a parallel discharge mode and the gear information is a second gear, a second target control strategy in the control strategy set is generated, the second target control strategy is used to control the first motor and / or the second motor as a drive motor, and The first driven end of the clutch is controlled to engage, the second driven end of the clutch is disconnected, and the synchronizer is connected to the driving gear of the third gear pair, the driving force of the engine, the first motor and / or the second motor is transmitted to the second transmission shaft, the third gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; if the driving mode information is the parallel discharge mode and the gear information is the third gear, a third target control strategy in the control strategy set is generated, and the third target control strategy is used to control the first motor and / or the second motor as a driving motor, and control the first driven end of the clutch to engage, the second driven end of the clutch to engage, the driving force of the engine, the first motor and / or the second motor is transmitted to the third transmission shaft, the first gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels.

[0021] In the above scheme, the first motor and the second motor are both used as drive motors in the parallel discharge mode. According to the power requirements and fuel economy requirements of the whole vehicle, the first motor and / or the second motor converts the electrical energy into driving force and then superimposes it with the driving force of the engine to drive the vehicle together and improve the driving force. This can maximize economic energy saving while ensuring the wheel-end power requirements, and maximize the wheel-end power output while ensuring economic energy saving.

[0022] As an optional manner, the generating of a control strategy set according to the driving mode information and the gear information includes: if the driving mode information is a braking energy recovery mode, generating a fourth target control strategy in the control strategy set, the fourth target control strategy being used to control the engine to be in a non-working state, the first motor to be in a non-working state, the second motor to be in a working state and to serve as a generator, and controlling the first driven end of the clutch to be disconnected, the second driven end of the clutch to be disconnected, the braking force of the vehicle to be transmitted to the second transmission shaft through the wheels, the second motor to convert the braking force into electrical energy, and to store it in the power battery; or, if the driving mode information is a braking energy recovery mode, generating a fourth target control strategy in the control strategy set, the fourth target control strategy being used to control the engine to be in a non-working state, the first motor to be in a non-working state, the second motor to be in a working state and to serve as a generator, and controlling the first driven end of the clutch to be disconnected, the second driven end of the clutch to be engaged, the braking force of the vehicle to be transmitted to the third transmission shaft through the wheels, the second motor to convert the braking force into electrical energy, and to store it in the power battery.

[0023] In the above scheme, the braking energy recovery mode is suitable for vehicle deceleration or braking energy recovery conditions. The braking power is recovered as electrical energy according to the power transmission route opposite to that of driving. By switching the power transmission route of the drive shaft and the gear set, different speed ratios are selected according to the driving conditions of the vehicle, thereby greatly improving the recovery efficiency.

[0024] As an optional manner, the generating a control strategy set according to the driving mode information and the gear information includes: if the driving mode information is the parking power generation mode, generating a fifth target control strategy in the control strategy set, the fifth target control strategy is used to control the engine to be in a working state, the first motor to be in a working state and serve as a generator, and the second motor to be in a non-working state, and control the first driven end of the clutch to be disconnected, the second driven end of the clutch to be disconnected, the driving force of the engine is transmitted to the first motor, the first motor converts the driving force into electrical energy and stores it in the power battery; or, if the driving mode information is the parking power generation mode, generating a fifth target control strategy in the control strategy set, the fifth target control strategy is used to control the engine to be in a working state, the first motor to be in a working state and serve as a generator, the second motor to be in a working state and serve as a generator, and control the first driven end of the clutch to be engaged, the second driven end of the clutch to be disconnected, the driving force of the engine is transmitted to the first motor and the second motor, the first motor and the second motor convert the driving force into electrical energy and store it in the power battery.

[0025] In the above scheme, the parking power generation mode is applicable to the vehicle parking and stopping conditions and the battery feeding state. In this mode, the driving force of the engine is transmitted to the first motor and / or the second motor, and the first motor and / or the second motor are used as generators.

[0026] Other features and advantages of the present application will be described in the subsequent description, and in part will become apparent from the description, or will be understood by implementing the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the structure of a first longitudinal dual-motor drive system provided in an embodiment of the present application is shown;

[0029] Figure 2 A schematic diagram of the structure of a second longitudinal dual-motor drive system provided in an embodiment of the present application is shown;

[0030] Figure 3 The figure shows the transmission route of driving force of the vehicle provided by the embodiment of the present application when it is in the first gear of the pure electric driving mode;

[0031] Figure 4 The figure shows the transmission route of driving force of the vehicle provided by the embodiment of the present application when the vehicle is in the third gear of the pure electric driving mode;

[0032] Figure 5 The figure shows the transmission route of driving force of the vehicle provided by the embodiment of the present application when it is in the first gear of the series mode;

[0033] Figure 6 The figure shows the transmission route of driving force of the vehicle provided by the embodiment of the present application when the vehicle is in the third gear of the series mode;

[0034] Figure 7 The transmission route of driving force of the vehicle provided by the embodiment of the present application in the first gear of the engine direct drive mode is shown;

[0035] Figure 8 The transmission route of driving force of the vehicle provided by the embodiment of the present application in the third gear of the engine direct drive mode is shown;

[0036] Fig. 9 The figure shows the transmission route of driving force of the vehicle provided by the embodiment of the present application when it is in the first gear of the parallel power generation mode;

[0037] Fig.10 The figure shows the transmission route of driving force of the vehicle provided by the embodiment of the present application when it is in the third gear of the parallel power generation mode;

[0038] Fig.11 The transmission route of driving force of the vehicle provided by the embodiment of the present application in the first gear of the parallel discharge mode is shown;

[0039] Fig.12 The transmission route of driving force of the vehicle provided by the embodiment of the present application in the third gear of the parallel discharge mode is shown;

[0040] Fig.13 The first transmission route of the braking force of the vehicle in the braking energy recovery mode provided by the embodiment of the present application is shown;

[0041] Fig.14 The third transmission route of the braking force of the vehicle in the braking energy recovery mode provided by the embodiment of the present application is shown;

[0042] Fig.15 The first transmission route of driving force of a vehicle in parking power generation mode provided by an embodiment of the present application is shown;

[0043] Fig.16 A second transmission route of driving force when the vehicle is in parking power generation mode provided by an embodiment of the present application is shown. DETAILED DESCRIPTION

[0044] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0045] It should be noted that all technical and scientific terms used in this document have the same meanings as those generally understood by technicians in the technical field to which this application belongs; the terms used in this document are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0046] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0047] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0048] Reference Figure 1 , Figure 1 A schematic diagram of the structure of the first longitudinal dual-motor drive system provided in an embodiment of the present application.

[0049] A longitudinal dual-motor drive system includes: an engine 1, a first motor 5, a second motor 6, a first transmission shaft 4, a second transmission shaft 8, a third transmission shaft 9, a clutch 7, a gear set 100, a fourth transmission shaft 15, and a fifth transmission shaft 16; the centers of the engine 1, the first transmission shaft 4, the first motor 5, the second motor 6, the second transmission shaft 8, and the third transmission shaft 9 are located on the same axis, and the fourth transmission shaft 15 and the fifth transmission shaft 16 are located on the same side of the axis and are parallel to the axis; the engine 1 is connected to the first motor 5 through the first transmission shaft 4, the rotor of the first motor 5 is installed on the first transmission shaft 4, and the first transmission shaft 4 is connected to the clutch 7; the second motor 6 is sleeved On the clutch 7, the clutch 7 is arranged between the first transmission shaft 4 and the second transmission shaft 8, and the clutch 7 is connected to the second transmission shaft 4; the third transmission shaft 9 is sleeved on the second transmission shaft 8 and connected to the clutch 7; the gear set 100 is arranged on the same side of the axis close to the fourth transmission shaft 15, and is connected to the second transmission shaft 8 and the third transmission shaft 9; the fourth transmission shaft 15 is connected to the gear set 100, the second transmission shaft 8 transmits power to the fifth transmission shaft 16 through the gear set 100 and the fourth transmission shaft 15, and the third transmission shaft 9 transmits power to the fifth transmission shaft 16 through the gear set 100 and the fourth transmission shaft 15; the fifth transmission shaft 16 transmits power to the wheels 2.

[0050] In this embodiment, the generator, the first motor 5, and the second motor 6 are arranged longitudinally in sequence along the vehicle space and are on the same axis. The engine 1 is connected to the first motor 5 and the second motor 6 through the first transmission shaft 4, which reduces the conversion of transmission direction and is beneficial to improving power transmission efficiency.

[0051] The first motor 5 and the second motor 6 are flexible in use and can be used as generators or drive motors. The working states of the first motor 5 and the second motor 6 can be flexibly switched according to the working conditions and driving status of the vehicle, so that the first motor 5 and the second motor 6 can work in a more appropriate working range, thereby realizing diversified driving modes and better power and economy.

[0052] The clutch 7 is connected to the second transmission shaft 8, and the third transmission shaft 9 is sleeved on the second transmission shaft 8. Therefore, by controlling the state of the clutch 7, the driving force can be selected to be transmitted along the second transmission shaft 8 to the gear set 100, or, transmitted to the gear set 100 along the third transmission shaft 9.

[0053] The driving force on the second transmission shaft 8 or the third transmission shaft 9 is transmitted to the fourth transmission shaft 15 through the gear set 100. One end of the gear set 100 is connected to the second transmission shaft 8 and the third transmission shaft 9, and the other end of the gear set 100 is connected to the fifth transmission shaft 16. Therefore, the driving force on the fourth transmission shaft 15 is also transmitted to the fifth transmission shaft 16 through the gear set 100. Finally, the fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0054] The gear set 100 includes at least three groups of gear pairs. On this basis, the embodiment of the present application does not specifically limit the number of gear pairs included in the gear set 100. Those skilled in the art can adjust it according to actual conditions, for example, three groups, four groups or five groups.

[0055] As an implementation manner, the fifth transmission shaft 16 transmits the driving force to the wheels 2 via the front wheel differential device 3 .

[0056] In the above scheme, the generator, the first motor 5, and the second motor 6 are coaxially arranged longitudinally, which can save the vehicle's axial space to the maximum extent, reduce the pressure of corresponding component design and production, and create conditions for the arrangement of complex suspension systems. Furthermore, these suspension systems can better balance the front and rear weights of the vehicle, improve the vehicle's handling stability and comfort, and through the simpler and more direct structural arrangement of the drive shaft and the gear set 100 and the cooperation between the two, it is possible to use fewer transmission elements to achieve diversified driving modes and improve transmission efficiency. In addition, the first motor 5 and the second motor 6 can both be used as generators or drive motors, or both can not participate in the drive. The flexible speed regulation of the generator, the first motor 5, and the second motor 6 can achieve a greater reduction in fuel consumption while ensuring the wheel-end power demand, which is more economical and energy-saving.

[0057] In some embodiments, the clutch 7 includes: a clutch active end 71, a clutch first driven end 72 and a clutch second driven end 73; the first transmission shaft 4 is connected to the clutch first driven end 72, and the engine 1 and the first motor 5 can be selectively connected or disconnected with the second motor 6 through the clutch first driven end 72; the third transmission shaft 9 is connected to the clutch second driven end 73, and the third transmission shaft 9 can be selectively connected or disconnected with the second motor 6 through the clutch second driven end 73.

[0058] If the first driven end 72 of the clutch is in the engaged state, the engine 1 and the first motor 5 are connected to the second transmission shaft 8 ; if the second driven end 73 of the clutch is in the engaged state, the engine 1 , the first motor 5 , and the second motor 6 are connected to the third transmission shaft 9 .

[0059] In the above scheme, by controlling the disconnection and engagement of the first driven end 72 of the clutch and the second driven end 73 of the clutch, the generator, the first motor 5 and the second motor 6 can be selectively connected to the second transmission shaft 8 or the third transmission shaft 9, thereby realizing a variety of coupling modes between the motor and the engine 1, and then the power transmission route can be selected, so that there is a more flexible driving mode selection when dealing with different working conditions, thereby achieving better power and economy.

[0060] In some embodiments, the gear set 100 includes a first gear pair 10, a second gear pair 11, a third gear pair 12, and a fourth gear pair 13; the first gear pair 10 includes a first gear pair driving gear 10a and a first gear pair driven gear 10b, the first gear pair driving gear 10a is connected to the third transmission shaft 9, the first gear pair driven gear 10b is meshed with the first gear pair driving gear 10a, and the first gear pair driven gear 10b is loosely sleeved on the fourth transmission shaft 15; the second gear pair 11 includes a second gear pair driving gear 11a and a second gear pair driven gear 11b, the second gear pair driving gear 11a is connected to the second transmission shaft 8, and the second gear pair driven gear 11b is meshed with the second gear pair driving gear 11a. The third gear pair 12 comprises a third gear pair driving gear 12a and a third gear pair driven gear 12b, the third gear pair driving gear 12a is connected to the second transmission shaft 8, the third gear pair driven gear 12b is meshed with the third gear pair driving gear 12a, and the third gear pair driven gear 12b is loosely mounted on the fourth transmission shaft 15; the fourth gear pair 13 comprises a second gear pair driven gear 11b and a fourth gear pair driven gear 11c, the second gear pair driven gear 11b is meshed with the fourth gear pair driven gear 11c, and the fourth gear pair driven gear 11c is loosely mounted on the fifth transmission shaft 16.

[0061] like Figure 2 As shown, Figure 2 A structural schematic diagram of the second longitudinal dual-motor drive system provided in an embodiment of the present application is shown, wherein the gear set 100 includes four gear pairs, wherein the active ends of three gear pairs are connected to the second transmission shaft 8 or the third transmission shaft 9, and the driven ends are connected to the fourth transmission shaft 15, for transmitting the driving force of the second transmission shaft 8 or the third transmission shaft 9 to the fourth transmission shaft 15, and the active end of the remaining fourth gear pair 13 is connected to the fourth transmission shaft 15, and the driven end is connected to the fifth transmission shaft 16, for transmitting the driving force of the fourth transmission shaft 15 to the fifth transmission shaft 16.

[0062] In the above scheme, the gear set 100 is provided with four sets of gear pairs, and the layout design of parallel and longitudinal arrangement between the transmission shafts, with the four sets of gear pairs, uses fewer transmission elements, reduces the conversion of transmission direction, reduces the energy loss in the power transmission process, and thus improves the power transmission efficiency. Among them, three sets of gear pairs provide three speed ratio driving modes, which always control the vehicle in the most economical working mode and achieve a greater reduction in fuel consumption.

[0063] In some embodiments, the system further includes: a synchronizer 14; the synchronizer 14 is disposed on the second transmission shaft 8 between the second gear pair 11 and the third gear pair 12, and is used to connect the second transmission shaft 8 with the second gear pair driving gear 11a or the third gear pair driving gear 12a.

[0064] If the position of the synchronizer 14 is adjusted so that the second transmission shaft 8 is connected to the second gear pair driving gear 11a, the driving force of the second transmission shaft 8 is then transmitted to the fourth transmission shaft 15 through the second gear pair 11. If the position of the synchronizer 14 is adjusted so that the second transmission shaft 8 is connected to the third gear pair driving gear 12a, the driving force of the second transmission shaft 8 is then transmitted to the fourth transmission shaft 15 through the third gear pair 12.

[0065] In the above scheme, by adjusting the position of the synchronizer 14, the second gear pair 11 or the third gear pair 12 can be selected as the power transmission route to achieve switching of different gears according to the vehicle power and driving conditions.

[0066] The present application also provides a vehicle, comprising a power battery and the longitudinal dual-motor hybrid system described in any of the above embodiments, wherein the vehicle comprises a power battery, the power battery is electrically connected to the longitudinal dual-motor hybrid system, and the power battery is used to store electricity generated by the longitudinal dual-motor hybrid system.

[0067] The present application also provides a vehicle control method, the control method is used to control the vehicle provided in the embodiment of the present application, the method comprises the following steps:

[0068] Step S10: Obtain the vehicle's driving mode information and gear information, wherein the driving mode information includes at least one of the following: pure electric driving mode, series mode, engine direct drive mode, parallel power generation mode, parallel discharge mode, braking energy recovery mode, and parking power generation mode; the gear information includes at least one of the following gears: first gear, second gear, and third gear.

[0069] Step S20: Generate a control strategy set based on the driving mode information and the gear information, the control strategy set is used to control at least one of the engine 1, the first motor 5, and the second motor 6 to be in a working or non-working state, and to control the target component to be in a target working state, wherein the target component includes at least the clutch 7.

[0070] In some embodiments, step S20 includes:

[0071] Step S201: If the driving mode information is a pure electric driving mode, and the gear information is the first gear, a first target control strategy in the control strategy set is generated, and the first target control strategy is used to control the engine 1 to be in a non-working state, the first motor 5 to be in a non-working state, and the second motor 6 to be in a working state, and to control the first driven end 72 of the clutch to be disconnected, the second driven end 73 of the clutch to be disconnected, and the synchronizer 14 to be connected to the second gear pair driving gear 11a, the second motor 6 converts the electric energy provided by the power battery into driving force and transmits it to the second transmission shaft 8, the second gear pair 11 transmits the driving force to the fourth transmission shaft 15, the fourth gear pair 13 transmits the driving force to the fifth transmission shaft 16, and the fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0072] For example, Figure 3 As shown, Figure 3 The figure shows the driving force transmission route of the vehicle provided by the embodiment of the present application in the first gear of the pure electric driving mode. The power transmission route is: second motor 6 → second transmission shaft 8 → second gear pair 11 → fourth transmission shaft 15 → fourth gear pair 13 → fifth transmission shaft 16.

[0073] Step S202: If the driving mode information is a pure electric driving mode, and the gear information is the second gear, a second target control strategy in the control strategy set is generated, and the second target control strategy is used to control the engine 1 to be in a non-working state, the first motor 5 to be in a non-working state, and the second motor 6 to be in a working state, and to control the first driven end 72 of the clutch to be disconnected, the second driven end 73 of the clutch to be disconnected, and the synchronizer 14 to be connected to the third gear pair driving gear 12a, the second motor 6 converts the electric energy provided by the power battery into driving force and transmits it to the second transmission shaft 8, the third gear pair 12 transmits the driving force to the fourth transmission shaft 15, the fourth gear pair 13 transmits the driving force to the fifth transmission shaft 16, and the fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0074] Will Figure 3 The route of the second gear pair 11 is replaced by the third gear pair 12, which is the transmission route of the driving force when the vehicle is in the second gear of the pure electric drive mode, and will not be repeated here. The power transmission route is: second motor 6 → second transmission shaft 8 → third gear pair 12 → fourth transmission shaft 15 → fourth gear pair 13 → fifth transmission shaft 16.

[0075] Step S203: If the driving mode information is a pure electric driving mode and the gear information is the third gear, a third target control strategy in the control strategy set is generated. The third target control strategy is used to control the engine 1 to be in a non-working state, the first motor 5 to be in a non-working state, the second motor 6 to be in a working state, and to control the first driven end 72 of the clutch to be disconnected and the second driven end 73 of the clutch to be engaged. The second motor 6 converts the electric energy provided by the power battery into driving force and transmits it to the third transmission shaft 9. The first gear pair 10 transmits the driving force to the fourth transmission shaft 15. The fourth gear pair 13 transmits the driving force to the fifth transmission shaft 16. The fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0076] For example, Figure 4 As shown, Figure 4 The figure shows the transmission route of driving force of the vehicle provided by the embodiment of the present application in the third gear of the pure electric driving mode. The power transmission route is: second motor 6 → third transmission shaft 9 → first gear pair 10 → fourth transmission shaft 15 → fourth gear pair 13 → fifth transmission shaft 16.

[0077] In the above scheme, the pure electric drive mode is suitable for vehicle starting, low-speed driving conditions, and the power battery is fully charged. In this mode, the generator and the first motor 5 do not participate in the drive, and the second motor 6 converts the electric energy of the power battery into driving force to supply the vehicle. By switching the power transmission route of the drive shaft and the gear set 100, the pure electric drive mode can provide three speed ratios.

[0078] In some embodiments, step S20 includes:

[0079] Step S201: If the driving mode information is a series mode and the gear information is a first gear, a first target control strategy in the control strategy set is generated, and the first target control strategy is used to control the driving force of the engine 1 to be transmitted to the first motor 5, the first motor 5 converts the driving force into electrical energy, and controls the first driven end 72 of the clutch to be disconnected, the second driven end 73 of the clutch to be disconnected, and the synchronizer 14 to be connected to the second gear pair driving gear 11a, the second motor 6 converts the electrical energy into driving force and transmits it to the second transmission shaft 8, the second gear pair 11 transmits the driving force to the fourth transmission shaft 15, the fourth gear pair 13 transmits the driving force to the fifth transmission shaft 16, and the fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0080] For example, Figure 5 As shown, Figure 5 The figure shows the transmission route of driving force of the vehicle provided by the embodiment of the present application in the first gear of the series mode. The power transmission route is: engine 1 → power battery → second motor 6 → second transmission shaft 8 → second gear pair 11 → fourth transmission shaft 15 → fourth gear pair 13 → fifth transmission shaft 16.

[0081] Step S202: If the driving mode information is the series mode and the gear information is the second gear, a second target control strategy in the control strategy set is generated, and the second target control strategy is used to control the driving force of the engine 1 to be transmitted to the first motor 5, the first motor 5 converts the driving force into electrical energy, and controls the first driven end 72 of the clutch to be disconnected, the second driven end 73 of the clutch to be disconnected, and the synchronizer 14 to be connected to the third gear pair driving gear 12a, the second motor 6 converts the electrical energy into driving force and transmits it to the second transmission shaft 8, the third gear pair 12 transmits the driving force to the fourth transmission shaft 15, the fourth gear pair 13 transmits the driving force to the fifth transmission shaft 16, and the fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0082] Will Figure 5 The route of the second gear pair 11 is replaced by the third gear pair 12, which is the transmission route of the driving force when the vehicle is in the second gear of the series mode, and will not be repeated here. The power transmission route is: engine 1→power battery→second motor 6→second transmission shaft 8→third gear pair 12→fourth transmission shaft 15→fourth gear pair 13→fifth transmission shaft 16.

[0083] Step S203: If the driving mode information is the series mode and the gear information is the third gear, a third target control strategy in the control strategy set is generated. The third target control strategy is used to control the transmission of the driving force of the engine 1 to the first motor 5, the first motor 5 converts the driving force into electrical energy, and controls the first driven end 72 of the clutch to be disconnected, the second driven end 73 of the clutch to be engaged, the second motor 6 converts the electrical energy into driving force and transmits it to the third transmission shaft 9, the first gear pair 10 transmits the driving force to the fourth transmission shaft 15, the fourth gear pair 13 transmits the driving force to the fifth transmission shaft 16, and the fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0084] For example, Figure 6 As shown, Figure 6 The figure shows the transmission route of driving force of the vehicle provided by the embodiment of the present application in the third gear of the series mode. The power transmission route is: engine 1 → power battery → second motor 6 → third transmission shaft 9 → first gear pair 10 → fourth transmission shaft 15 → fourth gear pair 13 → fifth transmission shaft 16.

[0085] When the first motor 5 is used as a generator, the series mode is further divided into a series power generation mode and a series discharge mode according to the power supply and demand relationship. If the power generation of the first motor 5 is greater than the driving power of the vehicle, the extra electric energy will be stored in the power battery, and the power battery will provide part of the electric energy to the second motor 6. This operating condition is the series power generation mode. If the power generation of the first motor 5 is less than the driving power of the vehicle, the power battery will also need to provide part of the electric energy to the second motor 6 to meet the power demand. This operating condition is the series discharge mode.

[0086] In the above scheme, the series mode is suitable for the vehicle's low-speed driving condition and the battery feeding state. In this mode, the engine 1 transmits the driving force to the first motor 5. The first motor 5 is used as a generator to convert the driving force of the engine 1 into electrical energy. Then, according to the driving power required for the vehicle's driving, it is determined whether part or all of the electrical energy converted by the first motor 5 is provided to the second motor 6 for driving the vehicle. By switching the power transmission route of the drive shaft and the gear set 100, the series mode can provide three speed ratios.

[0087] In some embodiments, step S20 includes:

[0088] Step S201: If the driving mode information is the engine direct drive mode, and the gear information is the first gear, generate the first target control strategy in the control strategy set, the first target control strategy is used to control the engine 1 to be in a working state, the first motor 5 rotates without working under the drive of the engine 1, and controls the first driven end 72 of the clutch to engage, the second driven end 73 of the clutch to disconnect, and the synchronizer 14 is connected to the second gear pair driving gear 11a, the driving force of the engine 1 is transmitted to the second transmission shaft 8, the second gear pair 11 transmits the driving force to the fourth transmission shaft 15, the fourth gear pair 13 transmits the driving force to the fifth transmission shaft 16, and the fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0089] For example, Figure 7 As shown, Figure 7 The driving force transmission route of the vehicle provided by the embodiment of the present application in the first gear of the engine direct drive mode is shown. The power transmission route is: engine 1 → second transmission shaft 8 → second gear pair 11 → fourth transmission shaft 15 → fourth gear pair 13 → fifth transmission shaft 16.

[0090] Step S202: If the driving mode information is the engine direct drive mode, and the gear information is the second gear, a second target control strategy in the control strategy set is generated, and the second target control strategy is used to control the engine 1 to be in a working state, the first motor 5 rotates with the engine 1 and does not work, and to control the first driven end 72 of the clutch to engage, the second driven end 73 of the clutch to disconnect, and the synchronizer 14 to be connected to the third gear pair driving gear 12a, the driving force of the engine 1 is transmitted to the second transmission shaft 8, the second gear pair 11 transmits the driving force to the fourth transmission shaft 15, the fourth gear pair 13 transmits the driving force to the fifth transmission shaft 16, and the fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0091] Will Figure 7 The route of the second gear pair 11 is replaced by the third gear pair 12, which is the transmission route of the driving force when the vehicle is in the second gear of the engine direct drive mode, and will not be repeated here. The power transmission route is: engine 1→second transmission shaft 8→third gear pair 12→fourth transmission shaft 15→fourth gear pair 13→fifth transmission shaft 16.

[0092] Step S203: If the driving mode information is the engine direct drive mode, and the gear information is the third gear, a third target control strategy in the control strategy set is generated. The third target control strategy is used to control the engine 1 to be in a working state, the first motor 5 rotates without working under the drive of the engine 1, and controls the first driven end 72 of the clutch to engage, the second driven end 73 of the clutch to engage, the driving force of the engine 1 is transmitted to the third transmission shaft 9, the first gear pair 10 transmits the driving force to the fourth transmission shaft 15, the fourth gear pair 13 transmits the driving force to the fifth transmission shaft 16, and the fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0093] For example, Figure 8 As shown, Figure 8 The driving force transmission route of the vehicle provided by the embodiment of the present application in the third gear of the engine direct drive mode is shown. The power transmission route is: engine 1→third transmission shaft 9→first gear pair 10→fourth transmission shaft 15→fourth gear pair 13→fifth transmission shaft 16.

[0094] In the above scheme, the direct drive mode of engine 1 is suitable for high-speed driving conditions of the vehicle. In this mode, the first motor 5 and the second motor 6 do not participate in the driving. The driving force of the engine 1 is directly transmitted to the second transmission shaft 8 or the third transmission shaft 9 and then used to drive the vehicle. By switching the power transmission route of the transmission shaft and the gear set 100, the direct drive mode of engine 1 can provide three speed ratios.

[0095] In some embodiments, step S20 includes:

[0096] Step S201: If the driving mode information is the parallel power generation mode, and the gear information is the first gear, a first target control strategy in the control strategy set is generated, and the first target control strategy is used to control the clutch 7 to engage, the engine 1 to be connected to the first motor 5 and / or the second motor 6, the first motor 5 and / or the second motor 6 to act as generators, and to control the first driven end 72 of the clutch to engage, the second driven end 73 of the clutch to be disconnected, and the synchronizer 14 to be connected to the second gear pair driving gear 11a, the driving force of the engine 1 is transmitted to the second transmission shaft 8, the second gear pair 11 transmits the driving force to the fourth transmission shaft 15, the fourth gear pair 13 transmits the driving force to the fifth transmission shaft 16, and the fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0097] For example, Fig. 9 As shown, Fig. 9 The driving force transmission route of the vehicle provided by the embodiment of the present application in the first gear of the parallel power generation mode is shown. The power transmission route is: engine 1 → second transmission shaft 8 → second gear pair 11 → fourth transmission shaft 15 → fourth gear pair 13 → fifth transmission shaft 16.

[0098] Step S202: If the driving mode information is the parallel power generation mode, and the gear information is the second gear, a second target control strategy in the control strategy set is generated, and the second target control strategy is used to control the clutch 7 to engage, the engine 1 to be connected to the first motor 5 and / or the second motor 6, the first motor 5 and / or the second motor 6 to act as generators, and to control the first driven end 72 of the clutch to engage, the second driven end 73 of the clutch to be disconnected, and the synchronizer 14 to be connected to the third gear pair driving gear 12a, the driving force of the engine 1 is transmitted to the second transmission shaft 8, the third gear pair 12 transmits the driving force to the fourth transmission shaft 15, the fourth gear pair 13 transmits the driving force to the fifth transmission shaft 16, and the fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0099] Will Fig. 9 The route of the second gear pair 11 is replaced by the third gear pair 12, which is the transmission route of the driving force when the vehicle is in the second gear of the parallel power generation mode, and will not be repeated here. The power transmission route is: engine 1→second transmission shaft 8→third gear pair 12→fourth transmission shaft 15→fourth gear pair 13→fifth transmission shaft 16.

[0100] Step S203: If the driving mode information is the parallel power generation mode, and the gear information is the third gear, a third target control strategy in the control strategy set is generated, and the third target control strategy is used to control the clutch 7 to engage, the engine 1 to be connected to the first motor 5 and / or the second motor 6, the first motor 5 and / or the second motor 6 to act as generators, and to control the first driven end 72 of the clutch to engage, the second driven end 73 of the clutch to engage, the driving force of the engine 1 is transmitted to the third transmission shaft 9, the first gear pair 10 transmits the driving force to the fourth transmission shaft 15, the fourth gear pair 13 transmits the driving force to the fifth transmission shaft 16, and the fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0101] For example, Fig.10 As shown, Fig.10 The driving force transmission route of the vehicle provided by the embodiment of the present application in the third gear of the parallel power generation mode is shown. The power transmission route is: engine 1→third transmission shaft 9→first gear pair 10→fourth transmission shaft 15→fourth gear pair 13→fifth transmission shaft 16.

[0102] In the above scheme, in the parallel power generation mode, the driving force of the engine 1 is directly transmitted to the second transmission shaft 8 or the third transmission shaft 9 to provide power for the vehicle. At the same time, according to the power demand of the whole vehicle, the first motor 5 and / or the second motor 6 are used as generators, and the driving force of the engine 1 is used to charge the power battery. By switching the power transmission route of the transmission shaft and the gear set 100 to select different speed ratios, the power generation efficiency is greatly improved.

[0103] In some embodiments, step S20 includes:

[0104] Step S201: If the driving mode information is the parallel discharge mode, and the gear information is the first gear, a first target control strategy in the control strategy set is generated, and the first target control strategy is used to control the first motor 5 and / or the second motor 6 as a driving motor, and control the first driven end 72 of the clutch to engage, the second driven end 73 of the clutch to disconnect, and the synchronizer 14 to be connected to the second gear pair driving gear 11a, the driving force of the engine 1, the first motor 5 and / or the second motor 6 is transmitted to the second transmission shaft 8, the second gear pair 11 transmits the driving force to the fourth transmission shaft 15, the fourth gear pair 13 transmits the driving force to the fifth transmission shaft 16, and the fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0105] For example, Fig.11 As shown, Fig.11The figure shows the transmission route of the driving force of the vehicle provided by the embodiment of the present application in the first gear of the parallel discharge mode. The red arrow indicates the driving force of the first motor 5 and / or the second motor 6 superimposed on the engine driving force, and the green arrow indicates the engine driving force. The power transmission route is: engine 1, first motor 5 and / or second motor 6 → second transmission shaft 8 → second gear pair 11 → fourth transmission shaft 15 → fourth gear pair 13 → fifth transmission shaft 16.

[0106] Step S202: If the driving mode information is the parallel discharge mode, and the gear information is the second gear, a second target control strategy in the control strategy set is generated, and the second target control strategy is used to control the first motor 5 and / or the second motor 6 as a driving motor, and control the first driven end 72 of the clutch to engage, the second driven end 73 of the clutch to disconnect, and the synchronizer 14 to be connected to the third gear pair driving gear 12a, the driving force of the engine 1, the first motor 5 and / or the second motor 6 is transmitted to the second transmission shaft 8, the third gear pair 12 transmits the driving force to the fourth transmission shaft 15, the fourth gear pair 13 transmits the driving force to the fifth transmission shaft 16, and the fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0107] Will Fig.11 The route of the second gear pair 11 is replaced by the third gear pair 12, which is the transmission route of the driving force when the vehicle is in the second gear of the parallel discharge mode, and will not be repeated here. The power transmission route is: engine 1, first motor 5 and / or second motor 6→second transmission shaft 8→third gear pair 12→fourth transmission shaft 15→fourth gear pair 13→fifth transmission shaft 16.

[0108] Step S203: If the driving mode information is the parallel discharge mode, and the gear information is the third gear, a third target control strategy in the control strategy set is generated, and the third target control strategy is used to control the first motor 5 and / or the second motor 6 as a driving motor, and control the first driven end 72 of the clutch to engage, the second driven end 73 of the clutch to engage, and the driving force of the engine 1, the first motor 5 and / or the second motor 6 is transmitted to the third transmission shaft 9, the first gear pair 10 transmits the driving force to the fourth transmission shaft 15, the fourth gear pair 13 transmits the driving force to the fifth transmission shaft 16, and the fifth transmission shaft 16 outputs the driving force to the wheel 2.

[0109] For example, Fig.12 As shown, Fig.12The figure shows the transmission route of the driving force of the vehicle provided by the embodiment of the present application in the third gear of the parallel discharge mode. The red arrow indicates the driving force of the first motor 5 and / or the second motor 6 superimposed on the engine driving force, and the green arrow indicates the engine driving force. The power transmission route is: engine 1, first motor 5 and / or second motor 6 → third transmission shaft 9 → first gear pair 10 → fourth transmission shaft 15 → fourth gear pair 13 → fifth transmission shaft 16.

[0110] In the above scheme, in the parallel discharge mode, the first motor 5 and the second motor 6 are both used as drive motors. According to the power requirements and fuel economy requirements of the whole vehicle, the first motor 5 and / or the second motor 6 convert the electrical energy into driving force and then add it to the driving force of the engine 1 to drive the vehicle together and improve the driving force. Under the premise of ensuring the wheel-end power requirements, it can maximize economic energy saving and maximize the wheel-end power output under the premise of ensuring economic energy saving.

[0111] In some embodiments, step 20 includes:

[0112] Step 201: If the driving mode information is a braking energy recovery mode, a fourth target control strategy in the control strategy set is generated, and the fourth target control strategy is used to control the engine 1 to be in a non-working state, the first motor 5 to be in a non-working state, the second motor 6 to be in a working state and serve as a generator, and to control the first driven end 72 of the clutch to be disconnected, the second driven end 73 of the clutch to be disconnected, and the braking force of the vehicle is transmitted to the second transmission shaft 8 through the wheel 2, and the second motor 6 converts the braking force into electrical energy and stores it in the power battery.

[0113] For example, Fig.13 As shown, Fig.13 The first transmission route of the braking force of the vehicle in the braking energy recovery mode provided by the embodiment of the present application is shown. The braking force transmission route is: fifth transmission shaft 16 → fourth gear pair 13 → fourth transmission shaft 15 → second gear pair 11 → second transmission shaft 8 → second motor 6 → power battery.

[0114] Will Fig.13 The route of the second gear pair 11 is replaced by the third gear pair 12, which is the second transmission route of the braking force when the vehicle is in the braking energy recovery mode, which will not be repeated here. The braking force transmission route is: the fifth transmission shaft 16 → the fourth gear pair 13 → the fourth transmission shaft 15 → the third gear pair 12 → the second transmission shaft 8 → the second motor 6 → the power battery.

[0115] Step S202: Alternatively, if the driving mode information is a braking energy recovery mode, a fourth target control strategy in the control strategy set is generated, and the fourth target control strategy is used to control the engine 1 to be in a non-working state, the first motor 5 to be in a non-working state, the second motor 6 to be in a working state and serve as a generator, and to control the first driven end 72 of the clutch to be disconnected, and the second driven end 73 of the clutch to be engaged, and the braking force of the vehicle is transmitted to the third transmission shaft 9 through the wheel 2, and the second motor 6 converts the braking force into electrical energy and stores it in the power battery.

[0116] For example, Fig.14 As shown, Fig.14 The third transmission route of the braking force of the vehicle in the braking energy recovery mode provided by the embodiment of the present application is shown. The braking force transmission route is: fifth transmission shaft 16 → fourth gear pair 13 → fourth transmission shaft 15 → first gear pair 10 → third transmission shaft 9 → second motor 6 → power battery.

[0117] In the above scheme, the braking energy recovery mode is suitable for vehicle deceleration or braking energy recovery conditions. The braking power is recovered as electrical energy according to the power transmission route opposite to that of driving. By switching the power transmission route of the drive shaft and the gear set 100, different speed ratios are selected according to the driving conditions of the vehicle, thereby greatly improving the recovery efficiency.

[0118] In some embodiments, step S20 includes:

[0119] Step S201: If the driving mode information is the parking power generation mode, the fifth target control strategy in the control strategy set is generated, and the fifth target control strategy is used to control the engine 1 to be in a working state, the first motor 5 to be in a working state and serve as a generator, and the second motor 6 to be in a non-working state, and to control the first driven end 72 of the clutch to be disconnected, and the second driven end 73 of the clutch to be disconnected, and the driving force of the engine 1 is transmitted to the first motor 5, and the first motor 5 converts the driving force into electrical energy and stores it in the power battery.

[0120] For example, Fig.15 As shown, Fig.15 The first transmission route of driving force provided by the embodiment of the present application in the parking power generation mode of the vehicle is shown. The driving force transmission route is: generator→first motor 5→power battery.

[0121] Step S202: Alternatively, if the driving mode information is a parking power generation mode, a fifth target control strategy in the control strategy set is generated, and the fifth target control strategy is used to control the engine 1 to be in a working state, the first motor 5 to be in a working state and act as a generator, the second motor 6 to be in a working state and act as a generator, and to control the first driven end 72 of the clutch to engage, and the second driven end 73 of the clutch to be disconnected, and the driving force of the engine 1 is transmitted to the first motor 5 and the second motor 6, and the first motor 5 and the second motor 6 convert the driving force into electrical energy and store it in the power battery.

[0122] For example, Fig.16 As shown, Fig.16 The second transmission route of driving force provided by the embodiment of the present application in the parking power generation mode of the vehicle is shown. The driving force transmission route is: generator → first motor 5 → second motor 6 → power battery.

[0123] In the above scheme, the parking power generation mode is applicable to the vehicle parking stop condition and the battery feeding state. In this mode, the driving force of the engine 1 is transmitted to the first motor 5 and / or the second motor 6, and the first motor 5 and / or the second motor 6 are used as generators.

[0124] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A longitudinal dual-motor hybrid power system, characterized in that: include: An engine, a first motor, a second motor, a first transmission shaft, a second transmission shaft, a third transmission shaft, a clutch, a gear set, a fourth transmission shaft, and a fifth transmission shaft; The centers of the engine, the first transmission shaft, the first motor, the second motor, the second transmission shaft, and the third transmission shaft are located on the same axis, and the fourth transmission shaft and the fifth transmission shaft are located on the same side of the axis and are parallel to the axis; The engine is connected to the first motor via the first transmission shaft, the rotor of the first motor is mounted on the first transmission shaft, and the first transmission shaft is connected to the clutch; The second motor is sleeved on the clutch, the clutch is arranged between the first transmission shaft and the second transmission shaft, and the clutch is connected to the second transmission shaft; The third transmission shaft is sleeved on the second transmission shaft and connected to the clutch; The gear set is arranged on the same side of the axis close to the fourth transmission shaft, and is connected to the second transmission shaft and the third transmission shaft; The fourth transmission shaft is connected to the gear set, the second transmission shaft transmits power to the fifth transmission shaft through the gear set and the fourth transmission shaft, and the third transmission shaft transmits power to the fifth transmission shaft through the gear set and the fourth transmission shaft; The fifth transmission shaft transmits the power to wheels.

2. The system according to claim 1, characterized in that The clutch comprises: a clutch driving end, a clutch first driven end and a clutch second driven end; The first transmission shaft is connected to the first driven end of the clutch, and the engine and the first motor can be selectively connected or disconnected with the second motor through the first driven end of the clutch; The third transmission shaft is connected to the second driven end of the clutch, and the third transmission shaft can be selectively connected to or disconnected from the second motor through the second driven end of the clutch.

3. The system according to claim 1, characterized in that The gear set includes a first gear pair, a second gear pair, a third gear pair, and a fourth gear pair; The first gear pair comprises a first gear pair driving gear and a first gear pair driven gear, the first gear pair driving gear is connected to the third transmission shaft, the first gear pair driven gear is meshed with the first gear pair driving gear, and the first gear pair driven gear is loosely sleeved on the fourth transmission shaft; The second gear pair comprises a second gear pair driving gear and a second gear pair driven gear, the second gear pair driving gear is connected to the second transmission shaft, the second gear pair driven gear is meshed with the second gear pair driving gear, and the second gear pair driven gear is loosely sleeved on the fourth transmission shaft; The third gear pair comprises a third gear pair driving gear and a third gear pair driven gear, the third gear pair driving gear is connected to the second transmission shaft, the third gear pair driven gear is meshed with the third gear pair driving gear, and the third gear pair driven gear is loosely sleeved on the fourth transmission shaft; The fourth gear pair includes the second gear pair driven gear and the fourth gear pair driven gear, the second gear pair driven gear is meshed with the fourth gear pair driven gear, and the fourth gear pair driven gear is loosely mounted on the fifth transmission shaft.

4. The system according to claim 3, characterized in that Also includes: Synchronizer; The synchronizer is disposed on the second transmission shaft between the second gear pair and the third gear pair, and is used to connect the second transmission shaft with the driving gear of the second gear pair or the driving gear of the third gear pair.

5. A vehicle, characterized in that: It comprises a power battery and the longitudinal dual-motor hybrid system as described in any one of claims 1 to 4, wherein the power battery is electrically connected to the longitudinal dual-motor hybrid system, and the power battery is used to store the electricity generated by the longitudinal dual-motor hybrid system.

6. A vehicle control method, characterized in that: The control method is used to control the vehicle according to claim 5, and the method comprises: Acquiring driving mode information and gear information of the vehicle, wherein the driving mode information includes at least one of the following: pure electric driving mode, series mode, engine direct drive mode, parallel power generation mode, parallel discharge mode, brake energy recovery mode, and parking power generation mode, and the gear information includes at least one of the following gears: first gear, second gear, and third gear; A control strategy set is generated based on the driving mode information and the gear information, wherein the control strategy set is used to control at least one of the engine, the first motor, and the second motor to be in a working or non-working state, and to control a target component to be in a target working state, wherein the target component includes at least a clutch.

7. The control method according to claim 6, characterized in that: The generating a control strategy set according to the driving mode information and the gear information comprises: If the driving mode information is a pure electric driving mode, and the gear information is a first gear, a first target control strategy in the control strategy set is generated, wherein the first target control strategy is used to control the engine to be in a non-working state, the first motor to be in a non-working state, the second motor to be in a working state, and to control the first driven end of the clutch to be disconnected, the second driven end of the clutch to be disconnected, and the synchronizer to be connected to the second gear pair driving gear, the second motor converts the electric energy provided by the power battery into driving force and transmits it to the second transmission shaft, the second gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; If the driving mode information is a pure electric driving mode, and the gear information is a second gear, a second target control strategy in the control strategy set is generated, wherein the second target control strategy is used to control the engine to be in a non-working state, the first motor to be in a non-working state, the second motor to be in a working state, and to control the first driven end of the clutch to be disconnected, the second driven end of the clutch to be disconnected, and the synchronizer to be connected to the driving gear of the third gear pair, the second motor converts the electric energy provided by the power battery into driving force and transmits it to the second transmission shaft, the third gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; If the driving mode information is a pure electric driving mode and the gear information is the third gear, a third target control strategy in the control strategy set is generated, and the third target control strategy is used to control the engine to be in a non-working state, the first motor to be in a non-working state, and the second motor to be in a working state, and to control the first driven end of the clutch to be disconnected and the second driven end of the clutch to be engaged, the second motor converts the electric energy provided by the power battery into driving force and transmits it to the third transmission shaft, the first gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels.

8. The control method according to claim 6, characterized in that: The generating a control strategy set according to the driving mode information and the gear information comprises: If the driving mode information is a series mode, and the gear information is a first gear, a first target control strategy in the control strategy set is generated, wherein the first target control strategy is used to control the driving force of the engine to be transmitted to the first motor, the first motor converts the driving force into electrical energy, and controls the first driven end of the clutch to be disconnected, the second driven end of the clutch to be disconnected, and the synchronizer to be connected with the second gear pair driving gear, the second motor converts the electrical energy into driving force and transmits it to the second transmission shaft, the second gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; If the driving mode information is a series mode, and the gear information is a second gear, a second target control strategy in the control strategy set is generated, wherein the second target control strategy is used to control the driving force of the engine to be transmitted to the first motor, the first motor converts the driving force into electrical energy, and controls the first driven end of the clutch to be disconnected, the second driven end of the clutch to be disconnected, and the synchronizer to be connected to the driving gear of the third gear pair, the second motor converts the electrical energy into driving force and transmits it to the second transmission shaft, the third gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; If the driving mode information is a series mode and the gear information is the third gear, a third target control strategy in the control strategy set is generated, and the third target control strategy is used to control the driving force of the engine to be transmitted to the first motor, and the first motor converts the driving force into electrical energy, and controls the first driven end of the clutch to be disconnected, the second driven end of the clutch to be engaged, the second motor converts the electrical energy into driving force and transmits it to the third transmission shaft, the first gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels.

9. The control method according to claim 6, characterized in that: The generating a control strategy set according to the driving mode information and the gear information comprises: If the driving mode information is the engine direct drive mode, and the gear information is the first gear, a first target control strategy in the control strategy set is generated, wherein the first target control strategy is used to control the engine to be in a working state, the first motor does not work when driven by the engine, and the first driven end of the clutch is engaged, the second driven end of the clutch is disconnected, and the synchronizer is connected to the second gear pair driving gear, the driving force of the engine is transmitted to the second transmission shaft, the second gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; If the driving mode information is the engine direct drive mode, and the gear information is the second gear, a second target control strategy in the control strategy set is generated, wherein the second target control strategy is used to control the engine to be in a working state, the first motor does not work when driven by the engine, and the first driven end of the clutch is engaged, the second driven end of the clutch is disconnected, and the synchronizer is connected to the driving gear of the third gear pair, the driving force of the engine is transmitted to the second transmission shaft, the second gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; If the driving mode information is the engine direct drive mode, and the gear information is the third gear, a third target control strategy in the control strategy set is generated, and the third target control strategy is used to control the engine to be in a working state, the first motor rotates without working under the drive of the engine, and the first driven end of the clutch is controlled to engage, the second driven end of the clutch is controlled to engage, the driving force of the engine is transmitted to the third transmission shaft, the first gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels.

10. The control method according to claim 6, characterized in that: The generating a control strategy set according to the driving mode information and the gear information comprises: If the driving mode information is the parallel power generation mode, and the gear information is the first gear, a first target control strategy in the control strategy set is generated, wherein the first target control strategy is used to control the clutch to engage, the engine to be connected to the first motor and / or the second motor, the first motor and / or the second motor to be used as a generator, and to control the first driven end of the clutch to engage, the second driven end of the clutch to be disconnected, and the synchronizer to be connected to the second gear pair driving gear, the driving force of the engine is transmitted to the second transmission shaft, the second gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; If the driving mode information is the parallel power generation mode, and the gear information is the second gear, a second target control strategy in the control strategy set is generated, the second target control strategy is used to control the clutch to engage, the engine to be connected to the first motor and / or the second motor, the first motor and / or the second motor to be used as a generator, and to control the first driven end of the clutch to engage, the second driven end of the clutch to be disconnected, and the synchronizer to be connected to the driving gear of the third gear pair, the driving force of the engine is transmitted to the second transmission shaft, the third gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; If the driving mode information is a parallel power generation mode, and the gear information is the third gear, a third target control strategy in the control strategy set is generated, and the third target control strategy is used to control the engagement of the clutch, the engine is connected to the first motor and / or the second motor, the first motor and / or the second motor are used as generators, and the first driven end of the clutch is controlled to engage, the second driven end of the clutch is engaged, the driving force of the engine is transmitted to the third transmission shaft, the first gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels.

11. The control method according to claim 6, characterized in that: The generating a control strategy set according to the driving mode information and the gear information comprises: If the driving mode information is the parallel discharge mode, and the gear information is the first gear, a first target control strategy in the control strategy set is generated, wherein the first target control strategy is used to control the first motor and / or the second motor as a driving motor, and to control the first driven end of the clutch to be engaged, the second driven end of the clutch to be disconnected, and the synchronizer to be connected to the second gear pair driving gear, the driving force of the engine, the first motor and / or the second motor is transmitted to the second transmission shaft, the second gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; If the driving mode information is the parallel discharge mode, and the gear information is the second gear, a second target control strategy in the control strategy set is generated, wherein the second target control strategy is used to control the first motor and / or the second motor as a driving motor, and to control the first driven end of the clutch to be engaged, the second driven end of the clutch to be disconnected, and the synchronizer to be connected to the driving gear of the third gear pair, the driving force of the engine, the first motor and / or the second motor is transmitted to the second transmission shaft, the third gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels; If the driving mode information is a parallel discharge mode, and the gear information is the third gear, a third target control strategy in the control strategy set is generated, and the third target control strategy is used to control the first motor and / or the second motor as a driving motor, and to control the first driven end of the clutch to engage, the second driven end of the clutch to engage, the driving force of the engine, the first motor and / or the second motor is transmitted to the third transmission shaft, the first gear pair transmits the driving force to the fourth transmission shaft, the fourth gear pair transmits the driving force to the fifth transmission shaft, and the fifth transmission shaft outputs the driving force to the wheels.

12. The control method according to claim 6, characterized in that: The generating a control strategy set according to the driving mode information and the gear information comprises: If the driving mode information is a braking energy recovery mode, a fourth target control strategy in the control strategy set is generated, wherein the fourth target control strategy is used to control the engine to be in a non-operating state, the first motor to be in a non-operating state, the second motor to be in an operating state and to serve as a generator, and to control the first driven end of the clutch to be disconnected, the second driven end of the clutch to be disconnected, the braking force of the vehicle is transmitted to the second transmission shaft through the wheels, and the second motor converts the braking force into electrical energy and stores it in the power battery; Alternatively, if the driving mode information is a braking energy recovery mode, a fourth target control strategy in the control strategy set is generated, and the fourth target control strategy is used to control the engine to be in a non-working state, the first motor to be in a non-working state, the second motor to be in a working state and serve as a generator, and to control the first driven end of the clutch to be disconnected and the second driven end of the clutch to be engaged, the braking force of the vehicle is transmitted to the third transmission shaft through the wheels, and the second motor converts the braking force into electrical energy and stores it in the power battery.

13. The control method according to claim 6, characterized in that: The generating a control strategy set according to the driving mode information and the gear information comprises: If the driving mode information is the parking power generation mode, a fifth target control strategy in the control strategy set is generated, wherein the fifth target control strategy is used to control the engine to be in a working state, the first motor to be in a working state and serve as a generator, the second motor to be in a non-working state, and to control the first driven end of the clutch to be disconnected, the second driven end of the clutch to be disconnected, the driving force of the engine to be transmitted to the first motor, and the first motor to convert the driving force into electrical energy and store it in the power battery; Alternatively, if the driving mode information is a parking power generation mode, a fifth target control strategy in the control strategy set is generated, and the fifth target control strategy is used to control the engine to be in a working state, the first motor to be in a working state and serve as a generator, the second motor to be in a working state and serve as a generator, and to control the first driven end of the clutch to engage and the second driven end of the clutch to disconnect, and the driving force of the engine is transmitted to the first motor and the second motor, and the first motor and the second motor convert the driving force into electrical energy and store it in the power battery.

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