Control method of hybrid power system of vehicle and electronic equipment

Abstract

The invention discloses a control method of a hybrid power system of a vehicle and electronic equipment. The method comprises the steps of obtaining a current mode of the hybrid power system; monitoring a monitoring signal corresponding to the current mode, and when the monitoring signal meets a switching condition, controlling the hybrid power system to be switched to a next mode. According to the current mode of the hybrid power system, the monitoring signal to be monitored is determined, and when the monitoring signal meets the switching condition, the hybrid power system is controlled to switch the mode. The monitoring signals are determined according to the current mode, the number of the monitoring signals needing logic calculation is greatly reduced, the processing efficiency is improved, and therefore the user requirement can be quickly responded.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-related technology, and in particular to a control method of a hybrid power system of a vehicle, an electronic device, a storage medium, and a computer program product. Background Art

[0002] Vehicles with hybrid power systems are driven by a combination of an engine and an electric motor. The engine can drive the vehicle and can also drive the electric motor to generate electricity. There can be one or more electric motors, which can generate electricity or serve as a drive motor to drive the vehicle.

[0003] Therefore, the hybrid power system has multiple modes and needs to switch between the multiple modes. In the prior art, for the mode switching of the hybrid power system, it is necessary to monitor the monitoring signals of all modes, which leads to slow processing and difficulty in quickly responding to user needs. Summary of the invention

[0004] Based on this, it is necessary to provide a control method for a vehicle's hybrid power system, an electronic device, a storage medium, and a computer program product to address the technical problem that the prior art hybrid power system is difficult to quickly respond to user needs when switching between multiple modes.

[0005] The present invention provides a control method for a hybrid power system of a vehicle, comprising:

[0006] Get the current mode of the hybrid system;

[0007] A monitoring signal corresponding to the current mode is monitored, and when the monitoring signal satisfies a switching condition, the hybrid power system is controlled to switch to a next mode.

[0008] Further, the monitoring a monitoring signal corresponding to the current mode and controlling the hybrid power system to switch to the next mode when the monitoring signal satisfies a switching condition includes:

[0009] Get user selection;

[0010] The monitoring signal corresponding to the current mode selected by the user is monitored, and when the monitoring signal satisfies a switching condition, the hybrid power system is controlled to switch to a next mode.

[0011] Furthermore, the hybrid power system includes: an engine, a first motor, a planetary gear mechanism, a first front wheel transmission gear set, a first differential, and a second motor, the planetary gear mechanism includes a sun gear, a planet carrier, a ring gear, and a plurality of planetary gears, the plurality of planetary gears are mounted on the planet carrier, and the planetary gears are respectively meshed with the sun gear and the inner ring of the ring gear, the engine is connected to the planet carrier, the first motor shaft of the first motor is connected to the sun gear, a braking mechanism for locking or unlocking the ring gear is mounted on the ring gear, and a locking mechanism for locking or unlocking the planet carrier is mounted on the planet carrier;

[0012] The first front wheel transmission gear set includes a first front wheel driving gear and a first front wheel driven gear connected, the first front wheel driving gear is meshed with the outer ring of the gear ring, the first front wheel driven gear is meshed with the first differential, and the first differential is connected to the axle of the front wheel of the vehicle;

[0013] The second motor is connected to the axle of the rear wheel of the vehicle;

[0014] A first disengagement mechanism is provided between the first front wheel transmission gear set and the wheel axle of the front wheel;

[0015] The vehicle further comprises a second front wheel transmission gear set, wherein the second front wheel transmission gear set comprises a second front wheel driving gear, a third front wheel driving gear, a second front wheel driven gear and a shifting mechanism, wherein the end of the ring gear extending in the direction of the first motor is also connected to a ring gear, the second front wheel driving gear is meshed with the outer ring of the ring gear, the third front wheel driving gear is meshed with the ring gear, the shifting mechanism is connected to the second front wheel driven gear, the second front wheel driven gear is meshed with the first differential, the first differential is connected to the wheel axle of the front wheel of the vehicle, and the shifting mechanism comprises a first gear, a second gear and a neutral gear, wherein:

[0016] When the shift mechanism is in first gear, controlling the shift mechanism to mesh with the second front wheel driving gear;

[0017] When the shift mechanism is in the second gear, controlling the shift mechanism to mesh with the third front wheel driving gear;

[0018] When the shift mechanism is in neutral, the shift mechanism, the second front wheel driving gear, and the third front wheel driving gear are controlled to be separated.

[0019] Further, the monitoring of the monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to the next mode includes:

[0020] When the user selects the option of taking into account the four-wheel drive:

[0021] If the current mode is the pure electric rear-wheel drive mode, the accelerator pedal opening and the battery state of charge are monitored, and when the accelerator pedal opening is higher than the opening threshold, the first motor is controlled to adjust the speed to a speed difference between the first disengagement mechanism or the two sides of the shift mechanism that is lower than the speed threshold, and the hybrid power system is controlled to switch to the pure electric four-wheel drive mode; or when the battery state of charge is lower than the first state of charge threshold, the engine is controlled to start, and the hybrid power system is controlled to switch to the extended-range rear-wheel drive mode;

[0022] If the current mode is the extended-range rear-wheel drive mode, the accelerator pedal opening is monitored, and when the accelerator pedal opening is greater than an opening threshold, the brake mechanism is controlled to be disengaged, the first motor is controlled to adjust the speed to a speed difference between the first disengagement mechanism or the two sides of the shift mechanism that is less than a speed threshold, and the hybrid power system is controlled to switch to the extended-range four-wheel drive mode;

[0023] If the current mode is the pure electric four-wheel drive mode, the front-wheel drive efficiency and the rear-wheel drive efficiency are monitored, and when the front-wheel drive efficiency is higher than the rear-wheel drive efficiency, the hybrid power system is controlled to switch to the pure electric front-wheel drive mode.

[0024] Further, the monitoring of the monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to the next mode includes:

[0025] When the user selects four-wheel drive priority:

[0026] If the current mode is the pure electric four-wheel drive mode, the driving condition and the battery charge state are monitored, and when the driving condition is a stable cycle condition, the hybrid power system is controlled to switch to the pure electric front-wheel drive mode or the pure electric rear-wheel drive mode, or when the battery charge state is lower than a second charge state threshold, the locking mechanism is controlled to unlock the planetary carrier, the engine is controlled to start, and the hybrid power system is controlled to switch to the parallel four-wheel drive mode;

[0027] If the current mode is the parallel four-wheel drive mode, the driving condition and the battery state of charge are monitored, and when the driving condition is a stable cycle condition, the hybrid power system is controlled to switch to the engine direct drive mode, or when the battery state of charge is lower than a third state of charge threshold, the first motor is controlled to generate electricity, and the hybrid power system is controlled to switch to the extended-range four-wheel drive mode, wherein the third state of charge threshold is lower than the second state of charge threshold;

[0028] If the current mode is the extended-range four-wheel drive mode, the driving condition is monitored, and when the driving condition is a stable cycle condition, the hybrid power system is controlled to switch to the extended-range front-wheel drive mode.

[0029] Further, the monitoring of the monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to the next mode includes:

[0030] When the user selects the reverse option;

[0031] If the current mode is the rear-wheel drive reverse mode, the slip signal and the battery charge state are monitored, and when the slip signal is yes, the first motor is controlled to adjust the speed to a speed difference between the first disengagement mechanism or the two sides of the shift mechanism that is less than a speed threshold, and the hybrid power system is controlled to switch to the four-wheel drive reverse mode; or when the battery charge state is lower than a fourth charge state threshold, the engine is controlled to start, and the hybrid power system is controlled to switch to the extended-range rear-wheel drive reverse mode;

[0032] If the current mode is the extended-range rear-wheel drive reverse mode, the slip signal is monitored. When the slip signal is yes, the engine is controlled to stop, the locking mechanism is controlled to lock the planetary carrier, the first motor is controlled to adjust the speed to a speed difference on both sides of the first disengagement mechanism or the shift mechanism that is less than a speed threshold, and the hybrid power system is controlled to switch to the four-wheel drive reverse mode.

[0033] Further, the monitoring of the monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to the next mode includes:

[0034] When the user selects the parking power generation option;

[0035] If the current mode is the first parking power generation mode, the vehicle rolling downhill signal is monitored, and when the vehicle rolling downhill signal is yes, the hybrid power system is controlled to switch to the second parking power generation mode, wherein, in the first parking power generation mode, the first disengagement mechanism remains disengaged or the shift mechanism remains in neutral, and in the second parking power generation mode, the first disengagement mechanism is engaged or the shift mechanism is in first gear or second gear.

[0036] Further, the hybrid system further includes a rear wheel transmission gear set and a second differential, the rear wheel transmission gear set includes a connected rear wheel driving gear and a rear wheel driven gear, the rear wheel driving gear is meshed with a motor shaft gear on a second motor shaft of the second motor, the rear wheel driven gear is meshed with the second differential, the second differential is connected to the wheel axle of the rear wheel of the vehicle, and a second disengagement mechanism is provided between the second differential and the wheel axle of the rear wheel;

[0037] The monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to a next mode, includes:

[0038] When the user selects the pre-sensing intelligent four-wheel drive option:

[0039] If the current mode is the pure electric front-wheel drive mode, the road condition information is monitored, and when the road condition information is the road condition information requiring four-wheel drive intervention, the second motor is controlled to adjust the speed, and the second disengagement mechanism is kept separated, and after confirming the four-wheel drive intervention, the hybrid power system is controlled to switch to the pure electric four-wheel drive mode, and in the pure electric four-wheel drive mode, the second disengagement mechanism is controlled to engage;

[0040] If the current mode is the pure electric rear-wheel drive mode, the road condition information is monitored. When the road condition information requires four-wheel drive intervention, the first motor is controlled to adjust the speed, and the first disengagement mechanism remains disengaged or the shift mechanism remains in neutral. After confirming the four-wheel drive intervention, the hybrid power system is controlled to switch to the pure electric four-wheel drive mode. In the pure electric four-wheel drive mode, the first disengagement mechanism is controlled to engage or the shift mechanism is controlled to switch to the first gear or the second gear.

[0041] The present invention provides an electronic device, comprising:

[0042] at least one processor; and,

[0043] a memory communicatively connected to at least one of the processors; wherein,

[0044] The memory stores instructions that can be executed by at least one of the processors. The instructions are executed by at least one of the processors to enable the at least one of the processors to perform the control method of the hybrid power system of the vehicle as described above.

[0045] The present invention provides a storage medium, characterized in that the storage medium stores computer instructions, and when a computer executes the computer instructions, it is used to execute all steps of the control method of the hybrid power system of the vehicle as described above.

[0046] The present invention provides a computer program product, comprising a computer program / instruction, wherein the computer program / instruction, when executed by a processor, implements the control method of the hybrid power system of the vehicle as described above.

[0047] The present invention determines the monitoring signal to be monitored according to the current mode of the hybrid power system, and controls the hybrid power system to switch modes when the monitoring signal meets the switching condition. The present invention determines the monitoring signal according to the current mode, greatly reducing the number of monitoring signals that need to be logically calculated, improving processing efficiency, and thus being able to quickly respond to user needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A flowchart of a control method for a hybrid power system of a vehicle according to an embodiment of the present invention;

[0049] Figure 2 A working flow chart of a control method of a hybrid power system of a vehicle according to the present invention;

[0050] Figure 3 A system schematic diagram of a hybrid power system according to an embodiment of the present invention;

[0051] Figure 4 A system principle diagram of a hybrid power system according to another embodiment of the present invention;

[0052] Figure 5 An electrical topology diagram of a hybrid power system according to another embodiment of the present invention;

[0053] Figure 6 A control block diagram of a hybrid power system according to another embodiment of the present invention;

[0054] Figure 7a This is a system schematic diagram of the pure electric four-wheel drive mode of the best embodiment of the present invention;

[0055] Figure 7b A speed relationship diagram of a pure electric four-wheel drive mode of the best embodiment of the present invention;

[0056] Figure 8a This is a system schematic diagram of the pure electric front-drive mode of the best embodiment of the present invention;

[0057] Figure 8b A speed relationship diagram of a pure electric front-wheel drive mode of the best embodiment of the present invention;

[0058] Figure 9a This is a system schematic diagram of the pure electric rear-drive mode of the best embodiment of the present invention;

[0059] Figure 9b A speed relationship diagram of a pure electric rear-drive mode of the best embodiment of the present invention;

[0060] Fig.10a This is a system schematic diagram of the extended-range rear-wheel drive mode of the best embodiment of the present invention;

[0061] Fig.10b A speed relationship diagram of the extended-range rear-wheel drive mode of the best embodiment of the present invention;

[0062] Fig.11a A system schematic diagram of the parking power generation mode of the best embodiment of the present invention;

[0063] Fig.11bA speed relationship diagram of the parking power generation mode of the best embodiment of the present invention;

[0064] Fig.12a This is a system schematic diagram of the extended-range four-wheel drive mode of the best embodiment of the present invention;

[0065] Figure 12b A speed relationship diagram of the extended-range four-wheel drive mode of the best embodiment of the present invention;

[0066] Fig.13a This is a system schematic diagram of the extended-range front-wheel drive mode of the best embodiment of the present invention;

[0067] Fig.13b A speed relationship diagram of the extended-range front-wheel drive mode of the best embodiment of the present invention;

[0068] Fig.14a A system schematic diagram of a parallel four-wheel drive mode of the best embodiment of the present invention;

[0069] Fig.14b A speed relationship diagram of the parallel four-wheel drive mode of the best embodiment of the present invention;

[0070] Fig.15a A system schematic diagram of an engine direct drive mode according to a preferred embodiment of the present invention;

[0071] Fig.15b A speed relationship diagram of the engine direct drive mode of the best embodiment of the present invention;

[0072] Fig.16a A system schematic diagram of a rear-wheel drive reverse mode according to a preferred embodiment of the present invention;

[0073] Fig.16b A speed relationship diagram of a rear-wheel drive reverse mode in the best embodiment of the present invention;

[0074] Fig.17a A system schematic diagram of the four-wheel drive reverse mode of the best embodiment of the present invention;

[0075] Fig.17b A speed relationship diagram of the four-wheel drive reverse mode of the best embodiment of the present invention;

[0076] Fig.18 This is a schematic diagram of the high efficiency area distribution of the first motor and the second motor in the best embodiment of the present invention;

[0077] Fig.19 A system schematic diagram of a hybrid power system according to another embodiment of the present invention;

[0078] Fig.20a A system schematic diagram of a pure electric four-wheel drive mode according to another embodiment of the present invention;

[0079] Fig.20bA speed relationship diagram of a pure electric four-wheel drive mode according to another embodiment of the present invention;

[0080] Fig.21a This is a system schematic diagram of a pure electric front-wheel drive mode of yet another embodiment of the present invention;

[0081] Figure 21b A speed relationship diagram of a pure electric front-wheel drive mode according to another embodiment of the present invention;

[0082] Fig.22a This is a system schematic diagram of a pure electric rear-drive mode of yet another embodiment of the present invention;

[0083] Figure 22b A speed relationship diagram of a pure electric rear-drive mode according to another embodiment of the present invention;

[0084] Fig.23a This is a system principle diagram of an extended-range rear-wheel drive mode according to yet another embodiment of the present invention;

[0085] Figure 23b A speed relationship diagram of an extended-range rear-wheel drive mode according to yet another embodiment of the present invention;

[0086] Fig.24a A system principle diagram of a parking power generation mode according to another embodiment of the present invention;

[0087] Figure 24b A speed relationship diagram of a parking power generation mode according to another embodiment of the present invention;

[0088] Fig.25a This is a system principle diagram of an extended-range four-wheel drive mode according to yet another embodiment of the present invention;

[0089] Fig.25b A speed relationship diagram of an extended-range four-wheel drive mode according to yet another embodiment of the present invention;

[0090] Fig.26a This is a system principle diagram of an extended-range front-wheel drive mode according to yet another embodiment of the present invention;

[0091] Figure 26b A speed relationship diagram of an extended-range front-wheel drive mode according to yet another embodiment of the present invention;

[0092] Fig.27a A system schematic diagram of a parallel four-wheel drive mode according to yet another embodiment of the present invention;

[0093] Figure 27b A rotation speed relationship diagram of a parallel four-wheel drive mode according to another embodiment of the present invention;

[0094] Fig.28a A system schematic diagram of an engine direct drive mode according to yet another embodiment of the present invention;

[0095] Fig.28bA speed relationship diagram of an engine direct drive mode according to another embodiment of the present invention;

[0096] Fig.29a A system schematic diagram of a rear-wheel drive reverse mode according to another embodiment of the present invention;

[0097] Fig.29b A speed relationship diagram of a rear-wheel drive reverse mode according to another embodiment of the present invention;

[0098] Fig.30a A system schematic diagram of a four-wheel drive reverse mode according to another embodiment of the present invention;

[0099] Fig.30b A speed relationship diagram of a four-wheel drive reverse mode according to another embodiment of the present invention;

[0100] Fig.31 This is a working diagram of a mode control method taking into account four-wheel drive selection in the best embodiment of the present invention;

[0101] Fig.32 This is a working diagram of the mode control method for four-wheel drive priority selection according to the best embodiment of the present invention;

[0102] Fig.33 This is a working diagram of the mode control method for four-wheel drive priority selection according to the best embodiment of the present invention;

[0103] Fig.34 A working diagram of a mode control method for parking selection according to a preferred embodiment of the present invention;

[0104] Fig.35 A flowchart of a mode control method for pre-sensing intelligent four-wheel drive selection according to a preferred embodiment of the present invention;

[0105] Fig.36 The figure is a schematic diagram of the hardware structure of an electronic device of the present invention.

[0106] Marking Description

[0107] 1. Engine; 2. First motor; 201. First motor shaft; 202. Housing; 3. Planetary gear mechanism; 31. Sun gear; 32. Planet carrier; 33. Ring gear; 331. Ring gear; 34. Planetary gear; 4. Braking mechanism; 5. Locking mechanism; 6. First front wheel transmission gear set; 61. First front wheel driving gear; 62. First front wheel driven gear; 7. First differential; 8. First disengagement mechanism; 9. Second motor; 901. Second motor shaft; 802. Motor shaft gear; 10. Front wheel; 11. Rear wheel; 12. Rear wheel transmission gear set; 121. Rear wheel driving gear; 122. Rear wheel driven gear; 13. Second differential; 14. Vehicle controller; 15. Engine controller; 16. First motor controller; 17. Second motor controller; 18. Second front wheel transmission gear set; 181. Second front wheel driving gear; 182. Third front wheel driving gear; 183. Second front wheel driven gear; 184. Shift mechanism; 19. High-voltage battery; 20. Battery management system; 100. Vehicle body. DETAILED DESCRIPTION

[0108] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. The same components are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0109] like Figure 1 The flowchart of a control method of a hybrid power system of a vehicle according to an embodiment of the present invention includes:

[0110] Step S101, obtaining the current mode of the hybrid power system;

[0111] Step S102, monitoring a monitoring signal corresponding to the current mode, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to a next mode.

[0112] Specifically, the present invention can be applied to electronic devices with processing capabilities, such as a controller of a vehicle, such as an electronic control unit (ECU) of a vehicle.

[0113] like Figure 3The figure shows a system principle diagram of a hybrid power system according to an embodiment of the present invention, comprising: an engine 1, a first motor 2, a planetary gear mechanism 3 and a controller, wherein the planetary gear mechanism 3 comprises a sun gear 31, a planet carrier 32, a ring gear 33 and a plurality of planetary gears 34, wherein the plurality of planetary gears 34 are mounted on the planet carrier 32, and the planetary gears 34 are respectively meshed with the sun gear 31 and the inner ring of the ring gear 33;

[0114] The engine 1 is connected to the planet carrier 32, the first motor shaft 201 of the first motor 2 is connected to the sun gear 31, and a brake mechanism 4 for locking or unlocking the ring gear 33 is installed on the ring gear 33;

[0115] The engine 1 , the first motor 2 , and the brake mechanism 4 are in communication connection with the controller.

[0116] Specifically, the engine 1 is connected to the planetary carrier 32 as power output.

[0117] In some embodiments, the engine input shaft of the engine 1 is connected to the planet carrier 32 .

[0118] In some embodiments, the planet carrier 32 serves as an engine input shaft and is connected to the engine.

[0119] The first motor shaft 201 of the first motor 2 is connected to the sun gear 31. Power output is achieved through the cooperation of the sun gear 31, the planet carrier 32, the ring gear 33 and the plurality of planetary gears 34. The sun gear 31 meshes with the planetary gears 34 to adjust the speed ratio between the engine 1 and the first motor 2. By controlling the brake mechanism 4 to lock or unlock the ring gear 33, and controlling the engine 1 and the first motor 2, multiple working modes are achieved.

[0120] In some embodiments, the first motor 2 is a high-speed motor, and the motor speed of the first motor 2 is higher than the speed of the engine 1 .

[0121] When the brake mechanism 4 locks the gear ring 33, the engine 1 drives the first motor 2 to generate electricity through the planetary carrier 32 and the sun gear 31. At the same time, due to the speed increase ratio of the planetary gear, the engine 1 and the first motor 2 both work in the high efficiency area, thereby improving the energy saving effect. At the same time, the unbalanced load problem of the speed increase gear can be improved, thereby achieving lower noise and longer durability.

[0122] When the brake mechanism 4 unlocks the ring gear 33, the ring gear 33 is used as power output. Therefore, part of the power of the engine 1 drives the sun gear 31 through the planetary carrier 32, thereby driving the first motor 2 to generate electricity. By controlling the speed of the first motor 2 and adjusting the speed ratio, stepless speed regulation is achieved. On the other hand, the power of the engine 1 drives the ring gear 33 through the planetary carrier 32, outputs driving torque, and drives the vehicle.

[0123] In some embodiments, the brake mechanism 4 is a drum brake mechanism or a friction plate brake mechanism. The brake mechanism 4 gradually locks the ring gear 33 from a moving state and can be disengaged with torque.

[0124] In some embodiments, the engine 1 is provided with a low-voltage starter, which can start the engine 1 quietly and smoothly when the first motor 2 is used for driving.

[0125] The present invention connects the engine and the first motor through a planetary gear mechanism, and locks or unlocks the ring gear of the planetary processing mechanism through a brake mechanism. When the ring gear is locked, the motor can be used as a generator to generate electricity. Due to the speed increase ratio of the planetary gear, the motor and the engine both work in the high-efficiency zone, thereby improving the energy-saving effect. After the ring gear is unlocked, the engine can drive the vehicle while charging the first motor, thereby realizing charging and driving, thereby saving a drive motor and reducing the overall space layout. It is also possible to adjust the engine's high-efficiency operating point by adjusting the generator speed according to the real-time vehicle speed, thereby bringing about the effect of saving fuel consumption.

[0126] In one embodiment, the controller includes: a vehicle controller 14, an engine controller 15 and a first motor controller 16, the vehicle controller 14 is respectively communicated with the engine controller 15 and the first motor controller 16, the engine controller 15 is respectively communicated with the engine 1, and the first motor controller 16 is respectively communicated with the first motor 2 and the braking mechanism 4.

[0127] Specifically, Figure 5 and Figure 6 As shown, the controller includes a vehicle controller 14, an engine controller 15 for controlling the engine, and a first motor controller 16 for controlling the first motor 2. The vehicle controller 14 receives a throttle pedal opening signal, a vehicle acceleration signal, a battery state of charge (SOC), a planetary gear ring speed signal, a left and right front wheel speed signal, and an environment and road condition identification signal, and then the vehicle controller 14 sends a torque command to the engine controller 15, and the engine controller 15 controls the engine 1. In addition, the vehicle controller 14 sends a torque command and a speed command to the first motor controller 16, and the first motor controller 16 controls the brake mechanism 4 to lock or unlock and controls the speed of the first motor 2 according to the received torque command, speed command, etc.

[0128] The hybrid powertrain includes multiple modes.

[0129] In some embodiments, the hybrid power system includes a pure electric four-wheel drive mode, a pure electric front-wheel drive mode, a pure electric rear-wheel drive mode, an extended-range rear-wheel drive mode, a first parking power generation mode, a second parking power generation mode, an extended-range four-wheel drive mode, an extended-range front-wheel drive mode, a parallel four-wheel drive mode, an engine direct drive mode, a rear-wheel drive reverse mode, an extended-range rear-wheel drive reverse mode, or a four-wheel drive reverse mode, wherein:

[0130] In pure electric four-wheel drive mode, the first motor driving the front wheels and the second motor driving the rear wheels are driven, the engine is stopped, and the vehicle is driven by the first motor and the second motor;

[0131] In pure electric front-wheel drive mode, the first motor drives, while the second motor idles or stops, and the engine stops;

[0132] In pure electric rear-drive mode, the first motor stops, the engine stops, and the second motor drives;

[0133] In the extended-range rear-drive mode, the engine is used to drive the first motor to generate electricity and the second motor to drive;

[0134] In the first parking power generation mode, the engine is used to drive the first motor to generate power, the second motor is on standby, and the differential connected to the motor for generating power is separated from the wheel end;

[0135] In the second parking power generation mode, the engine is used to drive the first motor to generate power, and the second motor is on standby and the differential connected to the motor for generating power is engaged with the wheel end;

[0136] In the extended-range four-wheel drive mode, the engine generates electricity while driving directly, the first motor generates electricity, and the second motor drives;

[0137] In the extended-range front-wheel drive mode, the engine generates electricity while driving directly, the first motor generates electricity, and the second motor idles or stops;

[0138] In parallel four-wheel drive mode, the engine is used for direct drive, while controlling the first motor for stepless speed regulation and the second motor for driving;

[0139] In the engine direct drive mode, the engine is used for direct drive, and the first motor is controlled to have stepless speed regulation, while the second motor is idling or stopped;

[0140] In the rear-drive reverse mode, the engine is stopped or used to generate electricity, the first motor is stopped or used to generate electricity, and the second motor is driven in reverse;

[0141] In the extended-range rear-wheel drive reverse mode, the engine is used to generate electricity, the first motor generates electricity, and the second motor drives in reverse;

[0142] In the four-wheel drive reverse mode, the engine stops, the first motor drives in reverse, and the second motor drives in reverse.

[0143] In this embodiment, step S101 is first performed to obtain the current mode of the hybrid power system.

[0144] Specifically, since the hybrid power system has multiple modes, the monitoring signals required to be monitored when switching between different modes are not the same.

[0145] The controller receives the accelerator pedal opening signal, the vehicle acceleration signal, the battery state of charge (SOC), the planetary gear ring speed signal, the left and right front wheel speed signals, and the environment and road condition identification signal, and determines the monitoring signal according to the accelerator pedal opening signal, the vehicle acceleration signal, the battery state of charge, the planetary gear ring speed signal, the left and right front wheel speed signals, and the environment and road condition identification signal.

[0146] For different modes, the monitoring signal to be monitored in the mode is recorded, and only the monitoring signal is monitored. The monitoring signals in other modes only need to be received without performing logical calculations, thereby improving processing efficiency.

[0147] Then, step S102 is executed to monitor a monitoring signal corresponding to the current mode, and when the monitoring signal satisfies a switching condition, the hybrid power system is controlled to switch to a next mode.

[0148] Specifically, the monitoring signal is monitored, and when the monitoring signal meets the switching condition, the controller controls the engine, the first motor, the second motor and other related components of the hybrid power system to switch to the next mode.

[0149] The present invention determines the monitoring signal to be monitored according to the current mode of the hybrid power system, and controls the hybrid power system to switch modes when the monitoring signal meets the switching condition. The present invention determines the monitoring signal according to the current mode, greatly reducing the number of monitoring signals that need to be logically calculated, improving processing efficiency, and thus being able to quickly respond to user needs.

[0150] like Figure 2 The flowchart of the control method of the hybrid power system of a vehicle of the present invention is shown, comprising:

[0151] Step S210, obtaining the current mode of the hybrid power system;

[0152] Step S220, obtaining user selection;

[0153] Step S230, monitoring a monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to a next mode.

[0154] Specifically, step S210 is first performed to obtain the current mode of the hybrid power system.

[0155] Among them, the modes of the hybrid power system include but are not limited to: pure electric four-wheel drive mode, pure electric front-wheel drive mode, pure electric rear-wheel drive mode, extended-range rear-wheel drive mode, first parking power generation mode, second parking power generation mode, extended-range four-wheel drive mode, extended-range front-wheel drive mode, parallel four-wheel drive mode, engine direct drive mode, rear-wheel drive reverse mode, or four-wheel drive reverse mode.

[0156] After the current mode is determined, step S220 is executed to obtain the user selection.

[0157] Among them, the user selection can be made by the user by clicking the screen, operating the gear shift, etc.

[0158] User options include but are not limited to: four-wheel drive selection, four-wheel drive priority selection, reverse selection, parking power generation selection, and pre-sensing intelligent four-wheel drive selection.

[0159] Finally, step S230 is executed to monitor a monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, control the hybrid power system to switch to a next mode.

[0160] This embodiment determines the corresponding monitoring signal based on the user selection and the current mode, so that the monitoring is more accurate and can be changed according to the user selection to better meet the user's needs.

[0161] In one embodiment, the hybrid system includes: an engine 1, a first motor 2, a planetary gear mechanism 3, a first front wheel transmission gear set 6, a first differential 7, and a second motor 9. The planetary gear mechanism 3 includes a sun gear 31, a planet carrier 32, a ring gear 33, and a plurality of planetary gears 34. The plurality of planetary gears 34 are mounted on the planet carrier 32, and the planetary gears 34 are respectively meshed with the sun gear 31 and the inner ring of the ring gear 33. The engine 1 is connected to the planet carrier 32, and the first motor shaft 201 of the first motor 2 is connected to the sun gear 31. A braking mechanism 4 for locking or unlocking the ring gear 33 is installed on the ring gear 33, and a locking mechanism 5 for locking or unlocking the planet carrier 32 is installed on the planet carrier 32.

[0162] The first front wheel transmission gear set 6 includes a first front wheel driving gear 61 and a first front wheel driven gear 62 connected, the first front wheel driving gear 61 is meshed with the outer ring of the ring gear 33, the first front wheel driven gear 62 is meshed with the first differential 7, and the first differential 7 is connected to the axle of the front wheel 10 of the vehicle;

[0163] The second motor 9 is connected to the axle of the rear wheel 11 of the vehicle;

[0164] A first disengagement mechanism 8 is provided between the first front wheel transmission gear set 6 and the axle of the front wheel 10 or;

[0165] The vehicle further comprises a second front wheel transmission gear set 18, the second front wheel transmission gear set 18 comprises a second front wheel driving gear 181, a third front wheel driving gear 182, a second front wheel driven gear 183 and a shift mechanism 184, the end of the ring gear 33 extending in the direction of the first motor 2 is also connected with a ring gear 331, the second front wheel driving gear 181 is meshed with the outer ring of the ring gear 33, the third front wheel driving gear 182 is meshed with the ring gear 331, the shift mechanism 184 is connected with the second front wheel driven gear 183, the second front wheel driven gear 183 is meshed with the first differential 7, the first differential 7 is connected with the axle of the front wheel 10 of the vehicle, and the shift mechanism 184 comprises a first gear, a second gear and a neutral gear, wherein:

[0166] When the shift mechanism 184 is in the first gear, the shift mechanism 184 is controlled to mesh with the second front wheel driving gear 181;

[0167] When the shift mechanism 184 is in the second gear, the shift mechanism 184 is controlled to mesh with the third front wheel driving gear 182;

[0168] When the shift mechanism 184 is in neutral, the shift mechanism 184 , the second front wheel driving gear 181 , and the third front wheel driving gear 182 are controlled to be separated.

[0169] A first disengagement mechanism 8 may be provided between the first front wheel transmission gear set 6 and the wheel axle of the front wheel 10, and the first disengagement mechanism 8 controls the first front wheel transmission gear set 6 to engage or disengage with the wheel axle of the front wheel 10. Alternatively, a second front wheel transmission gear set 18 is provided, and the gear shift mechanism 184 controls the engagement or disengagement with the front wheel 10 in the first gear, the second gear, and the neutral gear.

[0170] like Figure 4 , Figure 5 and Figure 6 As shown, another embodiment of the present invention is a hybrid power system, comprising: an engine 1, a first motor 2, a planetary gear mechanism 3, a first front wheel transmission gear set 6, a first differential 7, a second motor 9, a rear wheel transmission gear set 12, a second differential 13 and a controller, wherein the planetary gear mechanism 3 comprises a sun gear 31, a planet carrier 32, a ring gear 33 and a plurality of planetary gears 34, wherein the plurality of planetary gears 34 are mounted on the planet carrier 32, and the planetary gears 34 are respectively meshed with the sun gear 31 and the inner ring of the ring gear 33;

[0171] The engine 1 is connected to the planet carrier 32, the first motor shaft 201 of the first motor 2 is connected to the sun gear 31, and a brake mechanism 4 for locking or unlocking the ring gear 33 is installed on the ring gear 33;

[0172] The engine 1, the first motor 2 and the brake mechanism 4 are in communication connection with the controller;

[0173] The planet carrier 32 is provided with a locking mechanism 5 for locking or unlocking the planet carrier 32 , and the locking mechanism 5 is in communication connection with the controller;

[0174] The first front wheel transmission gear set 6 includes a first front wheel driving gear 61 and a first front wheel driven gear 62 connected, the first front wheel driving gear 61 is meshed with the outer ring of the ring gear 33, the first front wheel driven gear 62 is meshed with the first differential 7, and the first differential 7 is connected to the axle of the front wheel 10 of the vehicle;

[0175] A first disengagement mechanism 8 is provided between the first front wheel transmission gear set 6 and the axle of the front wheel 10, and the first disengagement mechanism 8 is in communication connection with the controller;

[0176] The hybrid power system further includes a ring gear speed sensor for detecting the speed of the ring gear 33, wherein the ring gear speed sensor is communicatively connected to the vehicle controller 14;

[0177] The second motor 9 is connected to the rear wheel 11 of the vehicle, and the rear wheel transmission gear set 12 includes a connected rear wheel driving gear 121 and a rear wheel driven gear 122, the rear wheel driving gear 121 is meshed with the motor shaft gear 902 on the second motor shaft 901 of the second motor 9, and the rear wheel driven gear 122 is meshed with the second differential 13, and the second differential 13 is connected to the wheel axle of the rear wheel 11 of the vehicle;

[0178] The controller includes: a vehicle controller 14, an engine controller 15, a first motor controller 16 and a second motor controller 17. The vehicle controller 14 is communicatively connected to the engine controller 15, the first motor controller 16 and the second motor controller 17 respectively. The engine controller 15 is communicatively connected to the engine 1. The first motor controller 16 is communicatively connected to the first motor 2 and the brake mechanism 4 respectively. The second motor controller 17 is communicatively connected to the second motor 9.

[0179] Specifically, the hybrid system of the present invention includes a front drive unit for driving the front wheels 10 of the vehicle body 100 and a rear drive unit for driving the rear wheels 11 of the vehicle body 100, wherein the front drive unit includes an engine 1 and a first motor 2, and the rear drive unit includes a second motor 9. The engine 1 and the first motor 2 are connected through a planetary gear mechanism 3, the brake mechanism 4 locks or unlocks the ring gear 33, and the locking mechanism 5 locks or unlocks the planet carrier 32. By controlling the brake mechanism 4, the locking mechanism 5, the first motor 2, the engine 1 and the second motor 9, a variety of working modes can be achieved.

[0180] In some embodiments, the locking mechanism 5 for locking or unlocking the planet carrier 32 is a clutch with forward and reverse locking or unlocking functions. The locking mechanism 5 can be implemented by using an existing clutch with a control function, such as an electromagnetic clutch, a hydraulic clutch, or a one-way clutch that can change the locking direction.

[0181] Among them, the locking mechanism 5 locks or unlocks the planet carrier 32. Different from ordinary one-way clutches and ordinary clutches. The locking mechanism 5 can lock the planet carrier 32 in both forward and reverse directions. By locking the planet carrier 32, the engine can be stopped, and the front wheels are driven by the first motor 2. Compared with the one-way clutch control between the planet carrier and the engine. However, since the one-way clutch can only be locked in a single direction. Therefore, when the one-way clutch can only be locked in the forward direction and cannot be locked in the reverse direction, it cannot be locked when reversing, resulting in the inability to reverse through the first motor 2. It is impossible to achieve four-wheel drive motor driven reversing. However, the present embodiment adopts a locking mechanism, and the locking mechanism does not limit forward or reverse locking. Therefore, when reversing is required, the planet carrier 32 can be locked and the first motor 2 can be driven to reverse, thereby achieving four-wheel drive motor reversing.

[0182] The ring gear 33 is connected to the first differential 7 through the first front wheel transmission gear set 6, specifically, the ring gear 33 is meshed with the first front wheel driving gear 61 of the first front wheel transmission gear set 6, and the first front wheel driven gear 62 of the first front wheel transmission gear set 6 is meshed with the first differential 7. The first front wheel driving gear 61 and the first front wheel driven gear 62 rotate together.

[0183] A first disengagement mechanism 8 is provided between the first front wheel transmission gear set 6 and the axle of the front wheel 10 .

[0184] Specifically, a first disengagement mechanism 8 is provided between the first front wheel transmission gear set 6 and the first differential 7; or

[0185] A first disengagement mechanism 8 is provided between the first differential 7 and the axle of the front wheel 10 .

[0186] In some embodiments, a first disengagement mechanism 8 is provided between the first differential 7 and the front wheel 10, and the first disengagement mechanism 8 controls the separation or engagement of the first differential 7 and the front wheel 10. The first disengagement mechanism 8 reduces the oil stirring loss of the reducer and the drag loss of the permanent magnet motor. The first disengagement mechanism 8 controls the engagement or disengagement of the first front wheel transmission gear set 6 with the first differential 7. Or the first disengagement mechanism 8 controls the engagement or disengagement of the first differential 7 with the front wheel 10. The first disengagement mechanism 8 is an existing disengagement mechanism capable of achieving engagement or disengagement of the differential with the wheel end; or the first disengagement mechanism 8 is an existing disengagement mechanism capable of achieving engagement or disengagement of the differential with the transmission gear.

[0187] In some embodiments, a second disengagement mechanism is provided between the second differential 13 and the axle of the rear wheel 11, and the second disengagement mechanism is communicatively connected with the controller. The second disengagement mechanism controls the engagement or disengagement of the second differential 13 with the rear wheel 11. The second disengagement mechanism is an existing disengagement mechanism capable of achieving engagement or disengagement between the differential and the wheel end.

[0188] In some embodiments, the controller includes: a vehicle controller 14, an engine controller 15, a first motor controller 16 and a second motor controller 17, the vehicle controller 14 is respectively communicated with the engine controller 15, the first motor controller 16 and the second motor controller 17, the engine controller 15 is communicated with the engine 1, the first motor controller 16 is respectively communicated with the first motor 2 and the braking mechanism 4, and the second motor controller 17 is communicated with the second motor 9.

[0189] Specifically, the controller includes: a vehicle controller 14, an engine controller 15, a first motor controller 16 and a second motor controller 17. The vehicle controller 14 receives an accelerator pedal signal, a vehicle acceleration signal, a battery charge state, a ring gear speed signal, a front wheel speed signal and other diagnostic signals, and then the vehicle controller 14 sends a torque command to the engine controller 15, and the engine controller 15 controls the engine 1. In addition, the vehicle controller 14 sends a torque command and a speed branch to the first motor controller 16, and sends a torque command to the second motor controller 17. The first motor controller 16 controls the locking or unlocking of the brake mechanism 4, controls the locking or unlocking of the locking mechanism 5, controls the position of the first disengagement mechanism 8, and realizes separation or engagement according to the received torque command and speed command, and also controls the speed of the first motor 2, and receives the speed and temperature signal of the first motor 2 and the position signal of the first disengagement mechanism 8. The second motor controller 17 controls the speed of the second motor 9 according to the received torque command, and receives the speed and temperature signal of the second motor 9. At the same time, the engine controller 15 , the first motor controller 16 and the second motor controller 17 return diagnostic signals to the vehicle controller 14 .

[0190] The hybrid power system also includes a ring gear speed sensor for detecting the rotational speed of the ring gear 33. The ring gear speed sensor is communicatively connected to the vehicle controller 14. The ring gear speed sensor provides the rotational speed of the ring gear 33 to the control strategy. On the one hand, it can be used to calculate the rotational speed of the engine, and on the other hand, it can be used as a reference for adjusting the speed difference when the disengagement mechanism is engaged.

[0191] In some embodiments, the hybrid power system further includes a position sensor for detecting the position of the first disengagement mechanism 8 , and the position sensor is communicatively connected to the controller.

[0192] Meanwhile, the first motor controller 16 and the second motor controller 17 are powered by a high-voltage battery 19 , and the high-voltage battery 19 is controlled by a battery management system 20 .

[0193] By setting the front drive unit and the rear drive unit, various combination working modes of the vehicle including front drive, electric rear drive and four-wheel drive can be established.

[0194] In one embodiment, the hybrid power system includes: pure electric four-wheel drive mode, pure electric front-wheel drive mode, pure electric rear-wheel drive mode, extended-range rear-wheel drive mode, vehicle D gear braking or the first parking power generation mode in vehicle P gear (wherein D gear is the forward gear and P gear is the parking gear), the second parking power generation mode in vehicle N gear (N gear is neutral), extended-range four-wheel drive mode, extended-range front-wheel drive mode, parallel four-wheel drive mode, engine direct drive mode, rear-wheel drive reverse mode, extended-range rear-wheel drive reverse mode, or four-wheel drive reverse mode.

[0195] The specific mode is as follows:

[0196]

[0197]

[0198] Among them, stop means stopping and not rotating, and restarting requires time to engage. Standby means that the vehicle can be started at any time in the parking state. Idle means that torque can continue to be supplied at any time.

[0199] In one embodiment, the hybrid power system includes: pure electric four-wheel drive mode, pure electric front-wheel drive mode, pure electric rear-wheel drive mode, extended-range rear-wheel drive mode, D gear braking or the first parking power generation mode in P gear, the second parking power generation mode in N gear, extended-range four-wheel drive mode, extended-range front-wheel drive mode, parallel four-wheel drive mode, engine direct drive mode, rear-wheel drive reverse mode, or four-wheel drive reverse mode, wherein:

[0200] In the pure electric four-wheel drive mode, the first motor 2 is driven, the brake mechanism 4 is disengaged, the first disengagement mechanism 8 is engaged, and at the same time the second motor 9 is driven, the engine 1 is stopped, and the locking mechanism 5 is engaged;

[0201] In the pure electric front-drive mode, the first motor 2 is driven, the brake mechanism 4 is disengaged, the first disengagement mechanism 8 is engaged, and at the same time, the second motor 9 is idling or stopped, the engine 1 is stopped, and the locking mechanism 5 is engaged;

[0202] In the pure electric rear-drive mode, the first motor 2 stops, the engine 1 stops, the second motor 9 drives, and at the same time, the brake mechanism 4 is engaged, the locking mechanism 5 is disengaged, and the first disengagement mechanism 8 is disengaged;

[0203] In the extended-range rear-drive mode, the engine 1 is used to drive the first motor 2 to generate electricity, the second motor 9 is driven, the brake mechanism 4 is engaged, the locking mechanism 5 is disengaged, and the first disengagement mechanism 8 is disengaged;

[0204] In the first parking power generation mode, the engine 1 is used to drive the first motor 2 to generate electricity, the second motor 9 is on standby, the brake mechanism 4 is engaged, the locking mechanism 5 is disengaged, and the first disengagement mechanism 8 is disengaged;

[0205] In the second parking power generation mode, the engine 1 is used to drive the first motor 2 to generate electricity, the second motor 9 is on standby, the brake mechanism 4 is engaged, the locking mechanism 5 is disengaged, and the first disengagement mechanism 8 is engaged;

[0206] In the extended-range four-wheel drive mode, the brake mechanism 4 is disengaged, the locking mechanism 5 is disengaged, the first disengagement mechanism 8 is engaged, the engine 1 generates electricity while driving directly, the first motor 2 generates electricity, and the second motor 9 drives;

[0207] In the extended-range front-drive mode, the brake mechanism 4 is disengaged, the locking mechanism 5 is disengaged, the first disengagement mechanism 8 is engaged, the engine 1 generates electricity while driving directly, the first motor 2 generates electricity, and the second motor 9 idles or stops;

[0208] In the parallel four-wheel drive mode, the brake mechanism 4 is disengaged, the locking mechanism 5 is disengaged, the first disengagement mechanism 8 is engaged, the engine 1 is used for direct drive, and the first motor 2 is controlled to be infinitely speed-regulated, and the second motor 9 is driven;

[0209] In the engine direct drive mode, the brake mechanism 4 is disengaged, the locking mechanism 5 is disengaged, the first disengagement mechanism 8 is engaged, the engine 1 is used for direct drive, and the first motor 2 is controlled to be infinitely speed-regulated, and the second motor 9 is idle or stopped;

[0210] In the rear-drive reverse mode, the brake mechanism 4 is engaged, the locking mechanism 5 is disengaged, the first disengagement mechanism 8 is disengaged, the engine 1 is stopped, the first motor 2 is stopped, and the second motor 9 is driven in reverse;

[0211] In the extended-range rear-drive reverse mode, the brake mechanism 4 is engaged, the locking mechanism 5 is disengaged, the first disengagement mechanism 8 is disengaged, the engine 1 is used to generate electricity, the first motor 2 generates electricity, and the second motor 9 drives in reverse;

[0212] In the four-wheel drive reverse mode, the brake mechanism 4 is disengaged, the locking mechanism 5 is engaged, the first disengaging mechanism 8 is engaged, the engine 1 is stopped, the first motor 2 is driven in reverse, and the second motor 9 is driven in reverse.

[0213] like Figure 7a and Figure 7b As shown, in the pure electric four-wheel drive mode, the first motor 2 drives the sun gear 31, the brake mechanism 4 is disengaged, the ring gear 33 is unlocked, the first disengagement mechanism 8 is engaged, the ring gear 33 rotates to drive the front wheel 10, and the second motor 9 drives to drive the rear wheel 11 to achieve four-wheel drive. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged. At this time, the engine 1 stops, the locking mechanism 5 is engaged, and the planet carrier 32 is locked.

[0214] like Figure 8a and Figure 8b As shown, in the pure electric front-drive mode, the first motor 2 drives the sun gear 31, the brake mechanism 4 is disengaged, the ring gear 33 is unlocked, the first disengagement mechanism 8 is engaged, the ring gear 33 rotates to drive the front wheel 10, and the second motor 9 idles or stops, so as to realize the front drive. If a second disengagement mechanism is provided, the second disengagement mechanism is disengaged. At this time, the engine 1 stops, the locking mechanism 5 is engaged, and the planet carrier 32 is locked.

[0215] like Figure 9a and Figure 9bAs shown, in the pure electric rear-drive mode, the first motor 2 stops, the engine 1 stops, and the second motor 9 is driven to drive the rear wheel 11 to achieve rear-drive. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged. At the same time, the brake mechanism 4 engages the locking gear ring 33, the locking mechanism 5 is disengaged, and the first disengagement mechanism 8 is also disengaged. Since the first disengagement mechanism 8 is disengaged, the loss caused by the towing of the first motor 2 can be reduced, thereby achieving the effect of saving power consumption.

[0216] like Fig.10a and Fig.10b As shown, in the extended-range rear-drive mode, the engine 1 is used to drive the first motor 2 to generate electricity, and the second motor 9 drives the rear wheel 11. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged. At this time, the brake mechanism 4 is engaged, the ring gear 33 is locked, the locking mechanism 5 is disengaged, and the first disengagement mechanism 8 is also disengaged. When the battery power is low, the first motor 2 is mainly used for power generation. At the same time, because of the speed increase ratio of the planetary gear, the engine 1 and the first motor 2 can work in the high-efficiency zone at the same time, achieving the effect of saving fuel consumption.

[0217] like Fig.11a and Fig.11b As shown, in the first parking power generation mode (D gear brake or P gear), the engine 1 is used to drive the first motor 2 to generate electricity, and the second motor 9 is on standby. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged. At this time, the brake mechanism 4 is engaged, the gear ring 33 is locked, the locking mechanism 5 is disengaged, and the first disengagement mechanism 8 is also disengaged.

[0218] In addition, in the second parking power generation mode (vehicle N gear), the engine 1 is used to drive the first motor 2 to generate electricity, and the second motor 9 is on standby. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged. At this time, the brake mechanism 4 is engaged, the ring gear 33 is locked, the locking mechanism 5 is disengaged, and the first disengagement mechanism 8 is engaged, which can be used as N gear parking. At this time, since the ring gear 33 is locked, a locking force is provided for the vehicle, which is equivalent to P gear parking.

[0219] like Fig.12a and Figure 12b As shown, in the extended-range four-wheel drive mode, the brake mechanism 4 is disengaged, the gear ring 33 is unlocked, the locking mechanism 5 is disengaged, the first disengagement mechanism 8 is engaged, the engine 1 is directly driven while generating electricity, the first motor 2 generates electricity, and the second motor 9 drives, thereby realizing four-wheel drive. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged. Direct drive means that the engine 1 directly drives the vehicle.

[0220] like Fig.13a and Fig.13bAs shown, in the extended-range front-drive mode, the brake mechanism 4 is disengaged, the gear ring 33 is unlocked, the locking mechanism 5 is disengaged, the first disengagement mechanism 8 is engaged, the engine 1 generates electricity while driving directly, the first motor 2 generates electricity, and the second motor 9 idles or stops, thereby realizing front-drive. If a second disengagement mechanism is provided, the second disengagement mechanism is disengaged.

[0221] like Fig.14a and Fig.14b As shown, in the parallel four-wheel drive mode, the brake mechanism 4 is disengaged, the gear ring 33 is unlocked, the locking mechanism 5 is disengaged, the first disengagement mechanism 8 is engaged, the engine 1 is used for direct drive, and the first motor 2 is controlled to be infinitely speed-regulated, and the second motor 9 is driven to realize four-wheel drive. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged.

[0222] like Fig.15a and Fig.15b As shown, in the engine direct drive mode, the brake mechanism 4 is disengaged, the gear ring 33 is unlocked, the locking mechanism 5 is disengaged, the first disengagement mechanism 8 is engaged, the engine 1 is used for direct drive, and the first motor 2 is controlled to be infinitely variable in speed, the second motor 9 is idle or stopped, and the vehicle is driven only by the engine. If a second disengagement mechanism is provided, the second disengagement mechanism is disengaged.

[0223] like Fig.16a and Fig.16b As shown, in the rear-drive reverse mode, the brake mechanism 4 is engaged, the ring gear 33 is locked, the locking mechanism 5 is disengaged, the first disengagement mechanism 8 is disengaged, the engine 1 is stopped or used for power generation, the first motor 2 is stopped or used for power generation, the second motor 9 is driven in reverse, and the vehicle is reversed through the rear wheels 11. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged.

[0224] like Fig.17a and Fig.17b As shown, in the four-wheel drive reverse mode, the brake mechanism 4 is disengaged, the gear ring 33 is unlocked, the locking mechanism 5 is engaged, the first disengagement mechanism 8 is engaged, the engine 1 is stopped, the first motor 2 is driven in reverse, and the second motor 9 is driven in reverse to achieve four-wheel reverse. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged.

[0225] Among them, in each speed relationship diagram, the arrow indicates that the speed is the active speed. Indicates that the speed is locked.

[0226] The mode switching principles are as follows:

[0227] When stronger power is needed or when getting out of trouble, the four-wheel drive intervenes. When the battery power is low, the front driving force is mainly provided by the engine 1, and when the battery power is high, the front driving force is mainly provided by the first motor 2.

[0228] When the battery power is high, the first motor 2 is mainly used for driving.

[0229] The engine direct drive mode is mainly used for working conditions with better engine direct drive efficiency. At this time, the first motor 2 is mainly used for stepless speed regulation of the engine 1 power, adjusting the engine 1 working point to an efficient speed to achieve the effect of saving fuel consumption. Specifically, the first motor is controlled to be adjusted according to the characteristics of the planetary gear. After the vehicle speed is determined, the speed of the engine can be adjusted to always be in the optimal fuel consumption range by adjusting the speed of the first motor. By using the speed increase ratio of the planetary gear, the power generation working point of the first motor 2 can be moved to the high-efficiency zone.

[0230] like Fig.18 As shown, in some embodiments, the high efficiency zones of the first motor 2 and the second motor 9 are designed to be distributed differently. Thus, pure electric front drive or pure electric rear drive can be switched according to the vehicle working condition, ensuring efficient operation in more working condition ranges.

[0231] When driving on flat roads, you can match a more efficient power source according to the load conditions and choose front-wheel drive or rear-wheel drive mode to save electricity.

[0232] In addition, since the motor takes into account both power generation and driving functions, the motor design speed of this embodiment is relatively high. In order to increase power generation efficiency, the power generation speed ratio of this embodiment is γ<1, so as to cooperate with the high-speed motor. Due to the high motor speed, the speed of the pure electric four-wheel drive vehicle is not limited. And the motor speed is high and the speed adjustment range is wide, allowing low-speed and high-power running.

[0233] like Fig.19 As shown, another embodiment of the present invention is a hybrid power system, comprising: an engine 1, a first motor 2, a planetary gear mechanism 3, a second front wheel transmission gear set 18, a first differential 7, a second motor 9, a rear wheel transmission gear set 12, a second differential 13 and a controller, wherein the planetary gear mechanism 3 comprises a sun gear 31, a planet carrier 32, a ring gear 33 and a plurality of planetary gears 34, wherein the plurality of planetary gears 34 are mounted on the planet carrier 32, and the planetary gears 34 are respectively meshed with the sun gear 31 and the inner ring of the ring gear 33;

[0234] The engine 1 is connected to the planet carrier 32, the first motor shaft 201 of the first motor 2 is connected to the sun gear 31, and a brake mechanism 4 for locking or unlocking the ring gear 33 is installed on the ring gear 33;

[0235] The engine 1, the first motor 2 and the brake mechanism 4 are in communication connection with the controller;

[0236] The planet carrier 32 is provided with a locking mechanism 5 for locking or unlocking the planet carrier 32 , and the locking mechanism 5 is in communication connection with the controller;

[0237] The second front wheel transmission gear set 18 includes a second front wheel driving gear 181, a third front wheel driving gear 182, a second front wheel driven gear 183 and a shift mechanism 184. The end of the ring gear 33 extending in the direction of the first motor 2 is also connected to a ring gear 331. The second front wheel driving gear 181 is meshed with the outer ring of the ring gear 33. The third front wheel driving gear 182 is meshed with the ring gear 331. The shift mechanism 184 is connected to the second front wheel driven gear 183. The second front wheel driven gear 183 is meshed with the first differential 7. The first differential 7 is connected to the axle of the front wheel 10 of the vehicle. The shift mechanism 184 includes a first gear, a second gear and a neutral gear, wherein:

[0238] When the shift mechanism 184 is in the first gear, the shift mechanism 184 is controlled to mesh with the second front wheel driving gear 181; or

[0239] When the shift mechanism 184 is in the second gear, the shift mechanism 184 is controlled to mesh with the third front wheel driving gear 182; or

[0240] When the shift mechanism 184 is in neutral, the shift mechanism 184, the second front wheel driving gear 181, and the third front wheel driving gear 182 are controlled to be separated;

[0241] The hybrid power system further includes a ring gear speed sensor for detecting the speed of the ring gear 33 , and the ring gear speed sensor is communicatively connected to the vehicle controller 14 .

[0242] The second motor 9 is connected to the rear wheel 11 of the vehicle, and the rear wheel transmission gear set 12 is respectively meshed with the second motor shaft 901 of the second motor 9 and the second differential 13;

[0243] The controller includes: a vehicle controller 14, an engine controller 15, a first motor controller 16 and a second motor controller 17. The vehicle controller 14 is communicatively connected to the engine controller 15, the first motor controller 16 and the second motor controller 17 respectively. The engine controller 15 is communicatively connected to the engine 1. The first motor controller 16 is communicatively connected to the first motor 2 and the brake mechanism 4 respectively. The second motor controller 17 is communicatively connected to the second motor 9.

[0244] Specifically, the second front wheel transmission gear set 18 is used in this embodiment, and the end of the ring gear 33 extending toward the first motor 2 is connected with a ring gear 331. In order to reduce the overall volume, the first motor 2 can be reduced in size by using an axial flux motor.

[0245] The second front wheel transmission gear set 18 includes a second front wheel driving gear 181, a third front wheel driving gear 182, a second front wheel driven gear 183 and a shifting mechanism 184, wherein the second front wheel driving gear 181 and the third front wheel driving gear 182 are loosely mounted on the shaft, and the second front wheel driving gear 181 is meshed with the outer ring of the ring gear 33, the third front wheel driving gear 182 is meshed with the ring gear 331, the shifting mechanism 184 is connected to the second front wheel driven gear 183, the second front wheel driven gear 183 is meshed with the first differential 7, and the first differential 7 is connected to the axle of the front wheel 10 of the vehicle.

[0246] When the shift mechanism 184 is in the first gear, the shift mechanism 184 is controlled to mesh with the second front wheel driving gear 181; or

[0247] When the shift mechanism 184 is in the second gear, the shift mechanism 184 is controlled to mesh with the third front wheel driving gear 182; or

[0248] When the shift mechanism 184 is in neutral, the shift mechanism 184 , the second front wheel driving gear 181 , and the third front wheel driving gear 182 are controlled to be separated.

[0249] like Fig.19 As shown, the controller controls the shift mechanism 184 to move left and right. When the shift mechanism 184 moves to the left, it meshes with the third front wheel driving gear 182, driving the second front wheel driven gear 183 to achieve a low gear (i.e., first gear). When the shift mechanism 184 moves to the right and meshes with the second front wheel driving gear 181, it drives the second front wheel driven gear 183 to achieve a high gear (i.e., second gear). When the shift mechanism 184 is in the middle position, the second front wheel driving gear 181, the third front wheel driving gear 182, and the shift mechanism 184 are separated into neutral gear.

[0250] The shift mechanism 184 may adopt a synchronizer or a clutch, and the neutral position may be used as a disengagement mechanism, so the disengagement mechanism between the first differential 7 and the front wheels 10 may be omitted.

[0251] The speed ratio between the third front wheel driving gear 182 and the ring gear 331 is greater than the speed ratio between the second front wheel driving gear 181 and the outer ring of the ring gear 33 .

[0252] This embodiment provides two gears with different speed ratios, and the neutral gear can replace the differential disengagement mechanism. The low gear achieves high torque output of the engine and expands the use range of the engine, especially in hybrid four-wheel drive, engine direct drive and other modes. The high gear is used at high speed to increase the maximum vehicle speed driven by the engine. At the same time, while achieving two gears, the number of shaft systems remains unchanged and the axial dimensions are equivalent.

[0253] By setting the front drive unit and the rear drive unit, various combination working modes of the vehicle including front drive, electric rear drive and four-wheel drive can be established.

[0254] In one embodiment, the hybrid power system includes: pure electric four-wheel drive mode, pure electric front-wheel drive mode, pure electric rear-wheel drive mode, extended-range rear-wheel drive mode, D gear braking or the first parking power generation mode in P gear, the second parking power generation mode in N gear, extended-range four-wheel drive mode, extended-range front-wheel drive mode, parallel four-wheel drive mode, engine direct drive mode, rear-wheel drive reverse mode, or four-wheel drive reverse mode.

[0255] The specific mode is as follows:

[0256]

[0257]

[0258] In one embodiment, the hybrid power system includes: pure electric four-wheel drive mode, pure electric front-wheel drive mode, pure electric rear-wheel drive mode, extended-range rear-wheel drive mode, D gear braking or the first parking power generation mode in P gear, the second parking power generation mode in N gear, extended-range four-wheel drive mode, extended-range front-wheel drive mode, parallel four-wheel drive mode, engine direct drive mode, rear-wheel drive reverse mode, extended-range rear-wheel drive reverse mode, or four-wheel drive reverse mode, wherein:

[0259] In the pure electric four-wheel drive mode, the first motor 2 is driven, the brake mechanism 4 is disengaged, the shift mechanism 184 is engaged in the first gear or the second gear, and at the same time the second motor 9 is driven, the engine 1 is stopped, and the locking mechanism 5 is engaged;

[0260] In the pure electric front-drive mode, the first motor 2 is driven, the brake mechanism 4 is disengaged, the shift mechanism 184 is engaged in the first gear or the second gear, and at the same time, the second motor 9 is idling or stopped, the engine 1 is stopped, and the locking mechanism 5 is engaged;

[0261] In the pure electric rear-drive mode, the first motor 2 stops, the engine 1 stops, the second motor 9 drives, and at the same time, the brake mechanism 4 is engaged, the locking mechanism 5 is disengaged, and the shift mechanism 184 is in neutral;

[0262] In the extended-range rear-drive mode, the engine 1 is used to drive the first motor 2 to generate electricity, the second motor 9 is driven, the brake mechanism 4 is engaged, the locking mechanism 5 is disengaged, and the shift mechanism 184 is in neutral;

[0263] In the first parking power generation mode, the engine 1 is used to drive the first motor 2 to generate power, the second motor 9 is on standby, the brake mechanism 4 is engaged, the locking mechanism 5 is disengaged, and the shift mechanism 184 is in neutral;

[0264] In the second parking power generation mode, the engine 1 is used to drive the first motor 2 to generate electricity, the second motor 9 is on standby, the brake mechanism 4 is engaged, the locking mechanism 5 is disengaged, and the shift mechanism 184 is in the first gear or the second gear;

[0265] In the extended-range four-wheel drive mode, the brake mechanism 4 is disengaged, the locking mechanism 5 is disengaged, the shift mechanism 184 is engaged in the first gear or the second gear, the engine 1 directly drives and generates electricity, the first motor 2 generates electricity, and the second motor 9 drives;

[0266] In the extended-range front-drive mode, the brake mechanism 4 is disengaged, the locking mechanism 5 is disengaged, the shift mechanism 184 is engaged in the first gear or the second gear, the engine 1 is directly driven and generates electricity, the first motor 2 generates electricity, and the second motor 9 is idling or stopped;

[0267] In the parallel four-wheel drive mode, the brake mechanism 4 is disengaged, the locking mechanism 5 is disengaged, the shift mechanism 184 is engaged in the first gear or the second gear, the engine 1 is used for direct drive, and the first motor 2 is controlled to be infinitely speed-regulated, and the second motor 9 is driven;

[0268] In the engine direct drive mode, the brake mechanism 4 is disengaged, the locking mechanism 5 is disengaged, the shift mechanism 184 is engaged in the first gear or the second gear, the engine 1 is used for direct drive, and the first motor 2 is controlled to be infinitely speed-regulated, and the second motor 9 is idle or stopped;

[0269] In the rear-drive reverse mode, the brake mechanism 4 is engaged, the locking mechanism 5 is disengaged, the shift mechanism 184 is in neutral, the engine 1 is stopped, the first motor 2 is stopped, and the second motor 9 is driven in reverse;

[0270] In the rear-drive reverse mode, the brake mechanism 4 is engaged, the locking mechanism 5 is disengaged, the shift mechanism 184 is in neutral, the engine 1 is used to generate electricity, the first motor 2 generates electricity, and the second motor 9 drives in reverse;

[0271] In the four-wheel drive reverse mode, the brake mechanism 4 is disengaged, the locking mechanism 5 is engaged, the shift mechanism 184 is engaged in the first gear or the second gear, the engine 1 is stopped, the first motor 2 is driven in reverse, and the second motor 9 is driven in reverse.

[0272] like Fig.20a As shown in FIG. 1 , another embodiment of the present invention is Fig.19 The schematic diagram of the hybrid system shown in FIG.

[0273] like Fig.20a and Fig.20bAs shown, in the pure electric four-wheel drive mode, the first motor 2 drives the sun gear 31, the brake mechanism 4 is disengaged, the ring gear 33 is unlocked, the shift mechanism 184 engages the first gear or the second gear, the ring gear 33 and the ring gear 331 rotate to drive the front wheel 10, and the second motor 9 drives to drive the rear wheel 11 to achieve four-wheel drive. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged. At this time, the engine 1 stops, the locking mechanism 5 is engaged, and the planet carrier 32 is locked.

[0274] like Fig.21a and Figure 21b As shown, in the pure electric front-drive mode, the first motor 2 drives the sun gear 31, the brake mechanism 4 is disengaged, the ring gear 33 is unlocked, the shift mechanism 184 engages the first gear or the second gear, the ring gear 33 and the ring gear gear 331 rotate to drive the front wheel 10, and the second motor 9 idles or stops, so as to realize the front drive. If a second disengagement mechanism is provided, the second disengagement mechanism is disengaged. At this time, the engine 1 stops, the locking mechanism 5 engages, and the planet carrier 32 is locked.

[0275] like Fig.22a and Figure 22b As shown, in the pure electric rear-drive mode, the first motor 2 stops, the engine 1 stops, and the second motor 9 is driven to drive the rear wheel 11 to achieve rear-drive. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged. At the same time, the brake mechanism 4 engages the locking gear ring 33, the locking mechanism 5 is disengaged, and the shift mechanism 184 is in neutral. Since the shift mechanism 184 is in neutral, the loss caused by the dragging of the first motor 2 can be reduced, thereby achieving the effect of saving power consumption.

[0276] like Fig.23a and Figure 23b As shown, in the extended-range rear-drive mode, the engine 1 is used to drive the first motor 2 to generate electricity, and the second motor 9 drives the rear wheel 11. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged. At this time, the brake mechanism 4 is engaged, the ring gear 33 is locked, the locking mechanism 5 is disengaged, and the shift mechanism 184 is in neutral. When the battery power is low, the first motor 2 is mainly used for power generation. At the same time, because of the speed increase ratio of the planetary gear, the engine 1 and the first motor 2 can work in the high-efficiency zone at the same time, achieving the effect of saving fuel consumption.

[0277] like Fig.24a and Figure 24b As shown, in the first parking power generation mode (D gear brake or P gear), the engine 1 is used to drive the first motor 2 to generate electricity, and the second motor 9 stops rotating. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged. At this time, the brake mechanism 4 is engaged, the ring gear 33 is locked, the locking mechanism 5 is disengaged, and the shift mechanism 184 is in neutral.

[0278] In addition, in the second parking power generation mode (vehicle N gear), the engine 1 is used to drive the first motor 2 to generate electricity, and the second motor 9 stops rotating. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged. At this time, the brake mechanism 4 is engaged, the ring gear 33 is locked, the locking mechanism 5 is disengaged, and the shift mechanism 184 is in the first gear or the second gear, which can be used as N gear parking. At this time, since the ring gear 33 is locked, a locking force is provided for the vehicle, which is equivalent to P gear parking.

[0279] like Fig.25a and Fig.25b As shown, in the extended-range four-wheel drive mode, the brake mechanism 4 is disengaged, the ring gear 33 is unlocked, the locking mechanism 5 is disengaged, the shift mechanism 184 is engaged in the first gear or the second gear, the engine 1 is directly driven and generates electricity, the first motor 2 generates electricity, and the second motor 9 drives, so as to realize the four-wheel drive. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged.

[0280] like Fig.26a and Figure 26b As shown, in the extended-range front-drive mode, the brake mechanism 4 is disengaged, the ring gear 33 is unlocked, the locking mechanism 5 is disengaged, the shift mechanism 184 is engaged in the first gear or the second gear, the engine 1 is directly driven and generates electricity, the first motor 2 generates electricity, and the second motor 9 is idle or stopped, so as to realize the front-drive. If a second disengagement mechanism is provided, the second disengagement mechanism is disengaged.

[0281] like Fig.27a and Figure 27b As shown, in the parallel four-wheel drive mode, the brake mechanism 4 is disengaged, the gear ring 33 is unlocked, the locking mechanism 5 is disengaged, the shift mechanism 184 is engaged in the first gear or the second gear, the engine 1 is used for direct drive, and the first motor 2 is controlled to be infinitely variable in speed, and the second motor 9 is driven to realize four-wheel drive. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged.

[0282] like Fig.28a and Fig.28b As shown, in the engine direct drive mode, the brake mechanism 4 is disengaged, the ring gear 33 is unlocked, the locking mechanism 5 is disengaged, the shift mechanism 184 is engaged in the first gear or the second gear, the engine 1 is used for direct drive, and the first motor 2 is controlled to be infinitely variable in speed, the second motor 9 is idle or stopped, and the vehicle is driven only by the engine. If a second disengagement mechanism is provided, the second disengagement mechanism is disengaged.

[0283] like Fig.29a and Fig.29b As shown, in the rear-drive reverse mode or the extended-range rear-drive reverse mode, the brake mechanism 4 is engaged, the ring gear 33 is locked, the locking mechanism 5 is disengaged, the shift mechanism 184 is in neutral, the engine 1 is stopped or used for power generation, the first motor 2 is stopped or used for power generation, the second motor 9 is driven in reverse, and the vehicle is reversed through the rear wheels 11. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged.

[0284] like Fig.30a and Fig.30b As shown, in the four-wheel drive reverse mode, the brake mechanism 4 is disengaged, the ring gear 33 is unlocked, the locking mechanism 5 is engaged, the shift mechanism 184 is engaged in the first gear or the second gear, the engine 1 is stopped, the first motor 2 is driven in reverse, and the second motor 9 is driven in reverse to achieve four-wheel reverse. If a second disengagement mechanism is provided, the second disengagement mechanism is engaged.

[0285] Among them, in each speed relationship diagram, the arrow indicates that the speed is the active speed. Indicates that the speed is locked.

[0286] In one embodiment, the monitoring of the monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to the next mode includes:

[0287] When the user selects the option of taking into account the four-wheel drive:

[0288] If the current mode is the pure electric rear-wheel drive mode, the accelerator pedal opening and the battery charge state are monitored, and when the accelerator pedal opening is higher than the opening threshold, the first motor 2 is controlled to adjust the speed to the first disengagement mechanism 8 or the speed difference between the two sides of the shift mechanism 184 is less than the speed threshold, and the hybrid power system is controlled to switch to the pure electric four-wheel drive mode; or when the battery charge state is lower than the first charge state threshold, the engine 1 is controlled to start, and the hybrid power system is controlled to switch to the extended-range rear-wheel drive mode;

[0289] If the current mode is the extended-range rear-wheel drive mode, the accelerator pedal opening is monitored, and when the accelerator pedal opening is greater than the opening threshold, the brake mechanism 4 is controlled to be disengaged, the first motor 2 is controlled to adjust the speed to the first disengagement mechanism 8 or the speed difference between the two sides of the shift mechanism 184 is less than the speed threshold, and the hybrid power system is controlled to switch to the extended-range four-wheel drive mode;

[0290] If the current mode is the pure electric four-wheel drive mode, the front-wheel drive efficiency and the rear-wheel drive efficiency are monitored, and when the front-wheel drive efficiency is higher than the rear-wheel drive efficiency, the hybrid power system is controlled to switch to the pure electric front-wheel drive mode.

[0291] In some embodiments, controlling the engine 1 to start includes starting the engine 1 by using the first motor 2 .

[0292] In this embodiment, when the user selects to take all-wheel drive into consideration, the logic of this embodiment is executed.

[0293] like Fig.31 The flowchart of the mode control method taking into account the four-wheel drive selection in the best embodiment of the present invention is shown, including:

[0294] Step S3101, if the current mode is the pure electric rear-drive mode, monitor the accelerator pedal opening and the battery charge state;

[0295] Step S3102: if the accelerator pedal opening is higher than the opening threshold, the hybrid power system is controlled to switch to the pure electric four-wheel drive mode, otherwise it remains in the pure electric rear-wheel drive mode;

[0296] Step S3103, if the battery state of charge is lower than the first state of charge threshold, the hybrid power system is controlled to switch to the extended-range rear-wheel drive mode, otherwise it remains in the pure electric rear-wheel drive mode;

[0297] Step S3104, if the current mode is the pure electric four-wheel drive mode, monitor the front-wheel drive efficiency and the rear-wheel drive efficiency;

[0298] Step S3105: If the front drive efficiency is higher than the rear drive efficiency, the hybrid power system is controlled to switch to the pure electric front drive mode; otherwise, the pure electric four-wheel drive mode is maintained;

[0299] Step S3106, if the current mode is the extended-range rear-wheel drive mode, monitoring the accelerator pedal opening;

[0300] Step S3107: If the accelerator pedal opening is greater than the opening threshold, the hybrid power system is controlled to switch to the extended-range four-wheel drive mode, otherwise it remains in the extended-range rear-wheel drive mode.

[0301] Specifically, for the aforementioned hybrid system, in the pure electric rear-drive mode, the monitoring signals are the accelerator pedal opening and the battery charge state. When the battery SOC is lower than the first SOC threshold, the engine needs to be started to generate electricity, so the engine can be started by the first motor to enter the extended-range rear-drive mode. When the accelerator pedal opening is higher than the opening threshold, it means that the user wants to accelerate or climb, etc., and the four-wheel drive force is stronger. Therefore, the first motor adjusts the speed so that the speed difference on both sides of the first disengagement mechanism or the shifting mechanism is less than the speed threshold, for example, close to 0, and smoothly engages to enter the pure electric four-wheel drive mode.

[0302] In the extended-range rear-wheel drive mode, the monitoring signal is the accelerator pedal opening. When the accelerator pedal opening is higher than the opening threshold, the ring gear brake mechanism 4 is disengaged, and the first motor is speed-regulated so that the speed difference on both sides of the first disengagement mechanism or the shift mechanism is less than the speed threshold, for example, close to 0, and the vehicle engages smoothly to enter the extended-range four-wheel drive mode.

[0303] In the four-wheel drive pure electric mode, the monitoring signals are the front-wheel drive efficiency and the rear-wheel drive efficiency. When the front-wheel drive efficiency is higher than the rear-wheel drive efficiency, the rear-wheel torque distribution is 0 and the second disengagement mechanism is disengaged.

[0304] Specifically, the speed and torque of the first motor can be calculated by collecting the front wheel speed and pedal opening signal, and then the corresponding front drive efficiency can be obtained by looking up the table. The speed and torque of the second motor can be calculated by collecting the rear wheel speed and pedal opening signal, and then the corresponding front drive efficiency can be obtained by looking up the table.

[0305] This embodiment takes into account the four-wheel drive selection, can save energy consumption, and takes into account the mode switching response speed.

[0306] In one embodiment, the monitoring of the monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to the next mode includes:

[0307] When the user selects four-wheel drive priority:

[0308] If the current mode is the pure electric four-wheel drive mode, the driving condition and the battery charge state are monitored, and when the driving condition is a stable cycle condition, the hybrid power system is controlled to switch to the pure electric front drive mode or the pure electric rear drive mode, or when the battery charge state is lower than a second charge state threshold, the locking mechanism 5 is controlled to unlock the planetary carrier 32, the engine 1 is controlled to start, and the hybrid power system is controlled to switch to the parallel four-wheel drive mode;

[0309] If the current mode is the parallel four-wheel drive mode, the driving condition and the battery state of charge are monitored, and when the driving condition is a stable cycle condition, the hybrid power system is controlled to switch to the engine direct drive mode, or when the battery state of charge is lower than a third state of charge threshold, the first motor 2 is controlled to generate electricity, and the hybrid power system is controlled to switch to the extended-range four-wheel drive mode, wherein the third state of charge threshold is lower than the second state of charge threshold;

[0310] If the current mode is the extended-range four-wheel drive mode, the driving condition is monitored, and when the driving condition is a stable cycle condition, the hybrid power system is controlled to switch to the extended-range front-wheel drive mode.

[0311] In some embodiments, controlling the engine 1 to start includes: starting the engine 1 via a low-voltage starter.

[0312] In this embodiment, when the user selects four-wheel drive priority, the logic of this embodiment is executed.

[0313] like Fig.32 The flowchart of the mode control method for four-wheel drive priority selection according to the best embodiment of the present invention is shown, including:

[0314] Step S3201, if the current mode is the pure electric four-wheel drive mode, monitor the driving condition and battery charge state;

[0315] Step S3202, when the driving condition is a stable cycle condition, control the hybrid power system to switch to a pure electric front-wheel drive mode or a pure electric rear-wheel drive mode, otherwise maintain the pure electric four-wheel drive mode;

[0316] Step S3203, when the battery state of charge is lower than the second state of charge threshold, control the hybrid power system to switch to the parallel four-wheel drive mode, otherwise maintain the pure electric four-wheel drive mode;

[0317] Step S3204, if the current mode is the parallel four-wheel drive mode, monitoring the driving condition and the battery charge state;

[0318] Step S3205, when the driving condition is a stable cycle condition, control the hybrid power system to switch to the engine direct drive mode, otherwise maintain the parallel four-wheel drive mode;

[0319] Step S3206, when the battery state of charge is lower than the third state of charge threshold, that is, when the battery needs to maintain power, control the hybrid power system to switch to the extended-range four-wheel drive mode, wherein the third state of charge threshold is lower than the second state of charge threshold, otherwise maintain the parallel four-wheel drive mode;

[0320] Step S3207, if the current mode is the extended-range four-wheel drive mode, monitoring the driving conditions;

[0321] Step S3208, when the driving condition is a stable cycle condition, control the hybrid power system to switch to the extended-range front-wheel drive mode, otherwise maintain the extended-range four-wheel drive mode.

[0322] Specifically, for the aforementioned hybrid system, in the pure electric four-wheel drive mode, the monitoring signal is the driving condition and the battery charge state. When the battery SOC is lower than the second SOC threshold, the user still needs a relatively strong power or four-wheel drive to get out of trouble, and the battery power is not high, so the engine locking mechanism 5 is separated, the planetary carrier 32 is unlocked, and the engine 1 is started by the low-voltage starter to enter the parallel four-wheel drive mode, which is more power-saving. When the driving condition is a stable cycle condition, the torque is distributed, the first disengagement mechanism 8 or the shift mechanism 184 switches to neutral, and enters the pure electric rear drive mode, or the second disengagement mechanism is disengaged to enter the pure electric front drive mode. The first SOC threshold can be the same as the second SOC threshold, and the third SOC threshold is less than the second SOC threshold. Specifically, when the vehicle speed of the driving condition is relatively stable and no obvious acceleration or deceleration occurs for a period of time, it is judged as a stable cycle condition. Specifically, it can be determined according to the vehicle acceleration, that is, the absolute value of the vehicle acceleration within the preset time is less than the preset acceleration threshold, and it is judged as a stable cycle condition. Switch to pure electric front-wheel drive or rear-wheel drive mode to reduce power consumption.

[0323] In some embodiments, controlling the hybrid power system to switch to a pure electric front drive mode or a pure electric rear drive mode includes:

[0324] The front drive efficiency and the rear drive efficiency are detected. When the front drive efficiency is higher than the rear drive efficiency, the hybrid power system is controlled to switch to the pure electric front drive mode. When the front drive efficiency is lower than the rear drive efficiency, the hybrid power system is controlled to switch to the pure electric rear drive mode.

[0325] In parallel four-wheel drive mode, the monitoring signal is the driving condition and the battery charge state. When the battery SOC is lower than the third SOC threshold, the battery needs to be charged, the first motor speed is adjusted to generate electricity, and the extended-range four-wheel drive mode is entered. In stable cycle conditions, the rear wheel torque distribution is 0, the second disengagement mechanism is disengaged, and the engine direct drive mode is entered. Among them, the engine of the extended-range four-wheel drive is mainly used for power generation, and driving is supplemented, while the parallel four-wheel drive engine is mainly used for driving, and power generation is supplemented.

[0326] This embodiment implements four-wheel drive priority, quickly switches between four-wheel drive modes, and appropriately enters two-wheel drive mode in steady-state conditions.

[0327] In one embodiment, the monitoring of the monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to the next mode includes:

[0328] When the user selects the reverse option;

[0329] If the current mode is the rear-wheel drive reverse mode, the slip signal and the battery charge state are monitored. When the slip signal is yes, the first motor 2 is controlled to adjust the speed to the first disengagement mechanism 8 or the speed difference between the two sides of the shift mechanism 184 is less than the speed threshold, and the hybrid power system is controlled to switch to the four-wheel drive reverse mode; or when the battery charge state is lower than the fourth charge state threshold, the engine 1 is controlled to start, and the hybrid power system is controlled to switch to the extended-range rear-wheel drive reverse mode;

[0330] If the current mode is the extended-range rear-wheel drive reverse mode, the slip signal is monitored. When the slip signal is yes, the engine 1 is controlled to stop, the locking mechanism 5 is controlled to lock the planetary carrier 32, the first motor 2 is controlled to adjust the speed to the first disengagement mechanism 8 or the speed difference on both sides of the shift mechanism 184 is less than the speed threshold, and the hybrid power system is controlled to switch to the four-wheel drive reverse mode.

[0331] In some embodiments, controlling the engine 1 to start includes: controlling the first motor 2 to control the engine 1 to start.

[0332] This embodiment is executed when the vehicle is reversing. When the user shifts gears to the reverse gear, the logic of this embodiment is executed.

[0333] like Fig.33 The flowchart of the mode control method for four-wheel drive priority selection according to the best embodiment of the present invention is shown, including:

[0334] Step S3301, if the current mode is rear-wheel drive reverse, monitor the slip signal and battery charge state;

[0335] Step S3302, when the left and right wheel speeds are abnormal and the slip signal is triggered, the hybrid power system is controlled to switch to the four-wheel drive reverse mode, otherwise the rear-wheel drive reverse mode is maintained;

[0336] Step S3303, when the battery state of charge is lower than the fourth state of charge threshold, control the hybrid power system to switch to the extended-range rear-wheel drive reverse mode, otherwise maintain the rear-wheel drive reverse mode;

[0337] Step S3304, if the current mode is the extended-range rear-wheel drive reverse mode, monitoring the slip signal;

[0338] Step S3305, when the left and right wheel speeds are abnormal and the slip signal is triggered, the hybrid power system is controlled to switch to the four-wheel drive reverse mode, otherwise the extended-range rear-wheel drive reverse mode is maintained.

[0339] Specifically, for the aforementioned hybrid power system, in the rear-wheel drive reverse mode, the monitoring signals are the slip signal and the battery charge state. When the battery SOC is lower than the fourth SOC threshold, the user still needs a relatively strong power or four-wheel drive to get out of trouble, but the battery power is not high, so the first motor starts the engine and enters the extended-range rear-wheel drive reverse mode, which is more power-saving. When the left and right wheel speeds are abnormal and the slip signal is yes, the first motor adjusts the speed so that the speed difference on both sides of the first disengagement mechanism or the shifting mechanism is less than the speed threshold, for example, close to 0, and smoothly engages to enter the four-wheel drive reverse mode. The first SOC threshold can be the same as the fourth SOC threshold.

[0340] In the extended-range rear-wheel drive reverse mode, the monitoring signal is a slip signal. When the left and right wheel speeds are abnormal and the slip signal is yes, the engine is turned off, the locking mechanism 5 is controlled to lock the planetary carrier 32, and the first motor 2 is adjusted to make the speed of both sides of the first disengagement mechanism or the shift mechanism close to 0, and smoothly engage to enter the four-wheel drive reverse mode.

[0341] This embodiment simultaneously monitors whether there is slippage when reversing, and switches to the four-wheel drive reverse mode when there is slippage, so as to take into account the four-wheel drive escape.

[0342] In one embodiment, the monitoring of the monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to the next mode includes:

[0343] When the user selects the parking power generation option;

[0344] If the current mode is the first parking power generation mode, the vehicle rolling downhill signal is monitored, and when the vehicle rolling downhill signal is yes, the hybrid power system is controlled to switch to the second parking power generation mode, wherein, in the first parking power generation mode, the first disengagement mechanism 8 remains disengaged or the shift mechanism 184 remains in neutral, and in the second parking power generation mode, the first disengagement mechanism 8 is engaged or the shift mechanism 184 is in first gear or second gear.

[0345] This embodiment executes the logic of this embodiment when the user selects to generate electricity for parking.

[0346] like Fig.34 The flowchart of the mode control method for parking selection according to the best embodiment of the present invention is shown, which includes:

[0347] Step S3401, if the current mode is the extended-range rear-drive mode, when it is detected that the parking power generation mode needs to be entered, the hybrid power system is controlled to switch to the first parking power generation mode, otherwise the extended-range rear-drive mode is maintained, and the vehicle slope slip signal is monitored. In the first parking power generation mode, the differential connected to the motor for power generation is separated from the wheel end;

[0348] Step S3402, if the vehicle rolling downhill signal is yes, control the hybrid power system to switch to the second parking power generation mode, otherwise maintain the first parking power generation mode, wherein in the second parking power generation mode, the differential connected to the motor for power generation is engaged with the wheel end.

[0349] Specifically, for the aforementioned hybrid power system, if it is detected that parking power generation is required, the first parking power generation mode is entered. Fig.34 The extended-range rear-drive mode in FIG. 1 is an example. In fact, in any mode, as long as the user chooses to generate power for parking, the first parking power generation mode is entered. In the first parking power generation mode, the first disengagement mechanism remains disengaged or the shift mechanism is in neutral.

[0350] In the first parking power generation mode, the monitoring signal is a slope sliding signal. When it is recognized that the vehicle is sliding down the slope, the second parking power generation mode is entered, the first disengagement mechanism is engaged or the shift mechanism is adjusted to the first gear or the second gear, and the second parking power generation mode is used to assist parking.

[0351] This embodiment uses parking power generation and also takes into account the hill-holding assist mode to avoid rolling down the slope.

[0352] In one embodiment, the hybrid system further includes a rear wheel transmission gear set 12 and a second differential 13, the rear wheel transmission gear set 12 includes a connected rear wheel driving gear 121 and a rear wheel driven gear 122, the rear wheel driving gear 121 is meshed with a motor shaft gear 902 on a second motor shaft 901 of the second motor 9, the rear wheel driven gear 122 is meshed with the second differential 13, the second differential 13 is connected to the axle of the rear wheel 11 of the vehicle, and a second disengagement mechanism is provided between the second differential 13 and the axle of the rear wheel 11;

[0353] The monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to a next mode, includes:

[0354] When the user selects the pre-sensing intelligent four-wheel drive option:

[0355] If the current mode is the pure electric front-wheel drive mode, the road condition information is monitored, and when the road condition information is the road condition information requiring four-wheel drive intervention, the second motor 9 is controlled to adjust the speed, and the second disengagement mechanism is kept separated, and after confirming the four-wheel drive intervention, the hybrid power system is controlled to switch to the pure electric four-wheel drive mode, and in the pure electric four-wheel drive mode, the second disengagement mechanism is controlled to engage;

[0356] If the current mode is the pure electric rear-wheel drive mode, the road condition information is monitored. When the road condition information requires four-wheel drive intervention, the first motor 2 is controlled to adjust the speed, and the first disengagement mechanism 8 remains disengaged or the shift mechanism 184 remains in neutral. After confirming the four-wheel drive intervention, the hybrid power system is controlled to switch to the pure electric four-wheel drive mode. In the pure electric four-wheel drive mode, the first disengagement mechanism 8 is controlled to engage or the shift mechanism 184 is controlled to switch to the first gear or the second gear.

[0357] In this embodiment, when the user selects the pre-sensing intelligent four-wheel drive option, the logic of this embodiment is executed.

[0358] like Fig.35 The flowchart of the mode control method for pre-sensing intelligent four-wheel drive selection according to the best embodiment of the present invention is shown, including:

[0359] Step S3501, if the current mode is a pure electric front-wheel drive mode or a two-wheel drive mode of a pure electric rear-wheel drive mode, then monitor the road condition information;

[0360] Step S3502, when the road condition information is road condition information requiring four-wheel drive intervention, controlling the speed of the non-involved driving motor, and separating the differential connected to the non-involved driving motor from the wheel end, otherwise keeping the mode unchanged;

[0361] Step S3503, monitoring four-wheel drive intervention confirmation information;

[0362] Step S3504, when the four-wheel drive intervention confirmation information is yes, control the hybrid power system to switch to the pure electric four-wheel drive mode, otherwise it remains unchanged. In the pure electric four-wheel drive mode, all differentials connected to the driving motors are engaged with the wheel ends.

[0363] Specifically, for the aforementioned hybrid power system, if the current mode is a pure electric front drive mode or a pure electric rear drive mode, the detection signal is road condition information. The road condition information can be obtained through the environment and road condition recognition signal.

[0364] When a road condition that may require four-wheel drive intervention is identified, the first or second motor that is not involved in the drive is adjusted in speed to wait for the disengagement mechanism to engage, that is, the motor speed is adjusted to make the disengagement mechanism follow the wheel speed and be ready to engage the disengagement mechanism at any time. Among them, the road condition that may require four-wheel drive intervention includes: identifying that an emergency lane change or emergency braking is required ahead, etc. This working condition requires four-wheel drive to improve the driving comfort and peace of mind.

[0365] When it is confirmed that four-wheel drive intervention is required, the disengagement mechanism engages or the shift mechanism is in first gear or second gear, entering the pure electric four-wheel drive mode.

[0366] Specifically, when the driver makes an emergency pedal or steering wheel action under road conditions that may require four-wheel drive intervention, it confirms the need for four-wheel drive intervention and enters pure electric four-wheel drive mode.

[0367] In this embodiment, the four-wheel drive standby state is set, and the motor adjusts the speed in advance, ready to engage and disengage the mechanism at any time, thereby speeding up the response speed.

[0368] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0369] like Fig.36 The figure shows a hardware structure diagram of an electronic device of the present invention, including:

[0370] at least one processor 3601; and,

[0371] A memory 3602 is communicatively connected to at least one of the processors 3601; wherein:

[0372] The memory 3602 stores instructions that can be executed by at least one of the processors, and the instructions are executed by at least one of the processors to enable the at least one processor to execute the control method of the hybrid power system of the vehicle as described above.

[0373] Fig.36A processor 3601 is taken as an example.

[0374] The electronic device may further include: an input device 3603 and a display device 3604 .

[0375] The processor 3601, the memory 3602, the input device 3603 and the display device 3604 may be connected via a bus or other means, and the figure takes the connection via a bus as an example.

[0376] The memory 3602 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions / modules corresponding to the control method of the hybrid power system of the vehicle in the embodiment of the present application, for example, Figure 1 , Figure 2 The processor 3601 executes various functional applications and data processing by running the non-volatile software programs, instructions and modules stored in the memory 3602, that is, implements the control method of the hybrid power system of the vehicle in the above embodiment.

[0377] The memory 3602 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created according to the use of the control method of the hybrid power system of the vehicle, etc. In addition, the memory 3602 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 3602 may optionally include a memory remotely arranged relative to the processor 3601, and these remote memories may be connected to a device for executing the control method of the hybrid power system of the vehicle via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0378] The input device 3603 may receive a user click input, and generate a signal input related to a user setting of a control method of a hybrid power system of a vehicle and a function control. The display device 3604 may include a display device such as a display screen.

[0379] The one or more modules are stored in the memory 3602 and, when executed by the one or more processors 3601, execute the control method of the hybrid power system of the vehicle in any of the above method embodiments.

[0380] The present invention determines the monitoring signal to be monitored according to the current mode of the hybrid power system, and controls the hybrid power system to switch modes when the monitoring signal meets the switching condition. The present invention determines the monitoring signal according to the current mode, greatly reducing the number of monitoring signals that need to be logically calculated, improving processing efficiency, and thus being able to quickly respond to user needs.

[0381] An embodiment of the present invention provides a storage medium, wherein the storage medium stores computer instructions. When a computer executes the computer instructions, the storage medium is used to execute all steps of the control method of the hybrid power system of the vehicle as described above.

[0382] In the context of the present disclosure, a storage medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or apparatus. The storage medium may be a machine-readable signal medium or a machine-readable storage medium. Alternatively, the storage medium may be a non-temporary computer-readable storage medium, for example, a non-temporary computer-readable storage medium may be a ROM, a random access memory (Random Access Memory, RAM), a compact disc read-only memory (Compact Disc ROM, CD-ROM), a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0383] An embodiment of the present invention provides a computer program product, including a computer program / instruction, which implements the control method of the hybrid power system of the vehicle as described above when executed by a processor.

[0384] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for controlling a hybrid power system of a vehicle, characterized in that: include: Get the current mode of the hybrid system; A monitoring signal corresponding to the current mode is monitored, and when the monitoring signal satisfies a switching condition, the hybrid power system is controlled to switch to a next mode.

2. The control method of the hybrid power system of a vehicle according to claim 1, characterized in that: The monitoring signal corresponding to the current mode is monitored, and when the monitoring signal satisfies a switching condition, the hybrid power system is controlled to switch to a next mode, including: Get user selection; The monitoring signal corresponding to the current mode selected by the user is monitored, and when the monitoring signal satisfies a switching condition, the hybrid power system is controlled to switch to a next mode.

3. The control method of the hybrid power system of a vehicle according to claim 2, characterized in that: The hybrid system comprises: an engine (1), a first motor (2), a planetary gear mechanism (3), a first front wheel transmission gear set (6), a first differential (7), and a second motor (9); the planetary gear mechanism (3) comprises a sun gear (31), a planet carrier (32), a ring gear (33), and a plurality of planetary gears (34); the plurality of planetary gears (34) are mounted on the planet carrier (32), and the planetary gears (34) are respectively meshed with the sun gear (31) and the inner ring of the ring gear (33); the engine (1) is connected to the planet carrier (32); the first motor shaft (201) of the first motor (2) is connected to the sun gear (31); a brake mechanism (4) for locking or unlocking the ring gear (33) is mounted on the ring gear (33); and a locking mechanism (5) for locking or unlocking the planet carrier (32) is mounted on the planet carrier (32); The first front wheel transmission gear set (6) comprises a first front wheel driving gear (61) and a first front wheel driven gear (62) connected to each other, the first front wheel driving gear (61) meshing with the outer ring of the ring gear (33), the first front wheel driven gear (62) meshing with the first differential (7), and the first differential (7) connected to the axle of the front wheel (10) of the vehicle; The second motor (9) is connected to the axle of the rear wheel (11) of the vehicle; A first disengagement mechanism (8) is provided between the first front wheel transmission gear set (6) and the wheel axle of the front wheel (10); or; The vehicle further comprises a second front wheel transmission gear set (18), wherein the second front wheel transmission gear set (18) comprises a second front wheel driving gear (181), a third front wheel driving gear (182), a second front wheel driven gear (183) and a shift mechanism (184); the end of the ring gear (33) extending in the direction of the first motor (2) is also connected to a ring gear (331); the second front wheel driving gear (181) is meshed with the outer ring of the ring gear (33); the third front wheel driving gear (182) is meshed with the ring gear (331); the shift mechanism (184) is connected to the second front wheel driven gear (183); the second front wheel driven gear (183) is meshed with the first differential (7); the first differential (7) is connected to the wheel axle of the front wheel (10) of the vehicle; the shift mechanism (184) comprises a first gear, a second gear and a neutral gear, wherein: When the gear shift mechanism (184) is in first gear, controlling the gear shift mechanism (184) to mesh with the second front wheel driving gear (181); When the shift mechanism (184) is in the second gear, controlling the shift mechanism (184) to mesh with the third front wheel driving gear (182); When the shift mechanism (184) is in neutral, the shift mechanism (184), the second front wheel driving gear (181), and the third front wheel driving gear (182) are controlled to be separated.

4. The control method of the hybrid power system of a vehicle according to claim 3, characterized in that: The monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to a next mode, includes: When the user selects the option of taking into account the four-wheel drive: If the current mode is the pure electric rear-wheel drive mode, the accelerator pedal opening and the battery charge state are monitored, and when the accelerator pedal opening is higher than the opening threshold, the first motor (2) is controlled to adjust the speed to the first disengagement mechanism (8) or the speed difference between the two sides of the shift mechanism (184) is less than the speed threshold, and the hybrid power system is controlled to switch to the pure electric four-wheel drive mode; or when the battery charge state is lower than the first charge state threshold, the engine (1) is controlled to start, and the hybrid power system is controlled to switch to the extended-range rear-wheel drive mode; If the current mode is the extended-range rear-wheel drive mode, the throttle pedal opening is monitored, and when the throttle pedal opening is greater than an opening threshold, the brake mechanism (4) is controlled to be disengaged, the first motor (2) is controlled to adjust the speed to a speed difference between the first disengagement mechanism (8) or the two sides of the shift mechanism (184) less than a speed threshold, and the hybrid power system is controlled to switch to the extended-range four-wheel drive mode; If the current mode is the pure electric four-wheel drive mode, the front-wheel drive efficiency and the rear-wheel drive efficiency are monitored, and when the front-wheel drive efficiency is higher than the rear-wheel drive efficiency, the hybrid power system is controlled to switch to the pure electric front-wheel drive mode.

5. The control method of the hybrid power system of a vehicle according to claim 3, characterized in that: The monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to a next mode, includes: When the user selects four-wheel drive priority: If the current mode is a pure electric four-wheel drive mode, the driving condition and the battery charge state are monitored, and when the driving condition is a stable cycle condition, the hybrid power system is controlled to switch to a pure electric front drive mode or a pure electric rear drive mode, or when the battery charge state is lower than a second charge state threshold, the locking mechanism (5) is controlled to unlock the planet carrier (32), the engine (1) is controlled to start, and the hybrid power system is controlled to switch to a parallel four-wheel drive mode; If the current mode is the parallel four-wheel drive mode, the driving condition and the battery state of charge are monitored, and when the driving condition is a stable cycle condition, the hybrid power system is controlled to switch to the engine direct drive mode, or when the battery state of charge is lower than a third state of charge threshold, the first motor (2) is controlled to generate electricity, and the hybrid power system is controlled to switch to the extended-range four-wheel drive mode, wherein the third state of charge threshold is lower than the second state of charge threshold; If the current mode is the extended-range four-wheel drive mode, the driving condition is monitored, and when the driving condition is a stable cycle condition, the hybrid power system is controlled to switch to the extended-range front-wheel drive mode.

6. The control method of the hybrid power system of a vehicle according to claim 3, characterized in that: The monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to a next mode, includes: When the user selects the reverse option; If the current mode is the rear-wheel drive reverse mode, the slip signal and the battery charge state are monitored, and when the slip signal is yes, the first motor (2) is controlled to adjust the speed to the first disengagement mechanism (8) or the speed difference between the two sides of the shift mechanism (184) is less than the speed threshold, and the hybrid power system is controlled to switch to the four-wheel drive reverse mode; or when the battery charge state is lower than the fourth charge state threshold, the engine (1) is controlled to start, and the hybrid power system is controlled to switch to the extended-range rear-wheel drive reverse mode; If the current mode is the extended-range rear-wheel drive reverse mode, a slip signal is monitored. When the slip signal is yes, the engine (1) is controlled to stop, the locking mechanism (5) is controlled to lock the planetary carrier (32), the first motor (2) is controlled to adjust the speed to the first disengagement mechanism (8) or the speed difference on both sides of the shift mechanism (184) is less than a speed threshold, and the hybrid power system is controlled to switch to the four-wheel drive reverse mode.

7. The control method of the hybrid power system of a vehicle according to claim 3, characterized in that: The monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to a next mode, includes: When the user selects the parking power generation option; If the current mode is the first parking power generation mode, the vehicle rolling downhill signal is monitored, and when the vehicle rolling downhill signal is yes, the hybrid power system is controlled to switch to the second parking power generation mode, wherein in the first parking power generation mode, the first disengagement mechanism (8) remains disengaged or the shift mechanism (184) remains in neutral, and in the second parking power generation mode, the first disengagement mechanism (8) is engaged or the shift mechanism (184) is in first gear or second gear.

8. The control method of the hybrid power system of a vehicle according to claim 3, characterized in that: The hybrid system further comprises a rear wheel transmission gear set (12) and a second differential (13), wherein the rear wheel transmission gear set (12) comprises a connected rear wheel driving gear (121) and a rear wheel driven gear (122), wherein the rear wheel driving gear (121) is meshed with a motor shaft gear (902) on a second motor shaft (901) of the second motor (9), and the rear wheel driven gear (122) is meshed with the second differential (13), wherein the second differential (13) is connected to the wheel axle of the rear wheel (11) of the vehicle, and a second disengagement mechanism is provided between the second differential (13) and the wheel axle of the rear wheel (11); The monitoring signal corresponding to the current mode selected by the user, and when the monitoring signal satisfies a switching condition, controlling the hybrid power system to switch to a next mode, includes: When the user selects the pre-sensing intelligent four-wheel drive option: If the current mode is the pure electric front-wheel drive mode, the road condition information is monitored, and when the road condition information is road condition information requiring four-wheel drive intervention, the second motor (9) is controlled to adjust the speed, and the second disengagement mechanism is kept separated, and after confirming the four-wheel drive intervention, the hybrid power system is controlled to switch to the pure electric four-wheel drive mode, and in the pure electric four-wheel drive mode, the second disengagement mechanism is controlled to engage; If the current mode is the pure electric rear-wheel drive mode, the road condition information is monitored. When the road condition information is the road condition information that requires four-wheel drive intervention, the first motor (2) is controlled to adjust the speed, and the first disengagement mechanism (8) is kept disengaged or the shift mechanism (184) is kept in neutral. After confirming the four-wheel drive intervention, the hybrid power system is controlled to switch to the pure electric four-wheel drive mode. In the pure electric four-wheel drive mode, the first disengagement mechanism (8) is controlled to engage or the shift mechanism (184) is controlled to switch to the first gear or the second gear.

9. An electronic device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to at least one of the processors; wherein, The memory stores instructions that can be executed by at least one of the processors, and the instructions are executed by at least one of the processors to enable at least one of the processors to execute the control method of the hybrid power system of the vehicle as described in any one of claims 1 to 8.

10. A storage medium, characterized in that: The storage medium stores computer instructions, and when a computer executes the computer instructions, it is used to execute all steps of the control method of the hybrid power system of a vehicle as described in any one of claims 1 to 8.

11. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the control method of the hybrid power system of the vehicle as claimed in any one of claims 1 to 8 is implemented.

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