Hybrid power system

Abstract

The hybrid power system comprises an engine, a first motor, a planetary gear mechanism and a controller, the planetary gear mechanism comprises a sun gear, a planet carrier, a gear ring and a plurality of planet gears, the planet gears are installed on the planet carrier, and the planet gears are engaged with the sun gear and the inner ring of the gear ring; the engine is connected with the planet carrier, a first motor shaft of the first motor is connected with the sun gear, and a braking mechanism used for locking or unlocking the gear ring is installed on the gear ring. The engine, the first motor and the brake mechanism are in communication connection with the controller. When the gear ring is locked, the motor can serve as a generator to generate electricity, due to the speed increasing ratio of the planetary gear, the motor and the engine both work in an efficient area, the energy-saving effect is improved, after the gear ring is unlocked, the engine can drive the vehicle while charging the first motor, and therefore one driving motor is omitted, and the overall space layout is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a hybrid power system. Background Art

[0002] For some existing hybrid power system vehicles, the engine and the motor are used for hybrid driving. There are two motors in the prior art. One motor is used as a generator, and the other motor is used as a driving motor. Specifically, the engine drives the generator to generate electricity, and then the generator supplies power to the driving motor to drive the vehicle.

[0003] However, in the prior art, the engine is directly connected to the generator. The high-efficiency area of the engine is in the low-speed medium-torque working condition area, while the high-efficiency area of the generator is generally in the medium-high speed working condition area. It is difficult to achieve overlap of the high-efficiency areas. Moreover, the generator is generally only used for power generation and cannot be reused for driving, or when reused for driving, most working conditions cannot be covered due to the low speed of the generator. Summary of the Invention

[0004] Based on this, in view of the technical problem that the prior art cannot make the engine and the generator work in the high-efficiency area at the same time and the overall space is too large, it is necessary to provide a hybrid power system.

[0005] The present invention provides a hybrid power system, including: an engine, a first motor, a planetary gear mechanism, and a controller. The planetary gear mechanism includes a sun gear, a planet carrier, a ring gear, and a plurality of planet gears. The plurality of planet gears are installed on the planet carrier, and the planet gears are respectively meshed with the sun gear and the inner ring of the ring gear;

[0006] The engine is connected to the planet carrier, the first motor shaft of the first motor is connected to the sun gear, and a braking mechanism for locking or unlocking the ring gear is installed on the ring gear;

[0007] The engine, the first motor, and the braking mechanism are communicatively connected to the controller.

[0008] Further, a locking mechanism for locking or unlocking the planet carrier is installed on the planet carrier, and the locking mechanism is communicatively connected to the controller.

[0009] Furthermore, it further includes a first front-wheel transmission gear set and a first differential. The first front-wheel transmission gear set includes a connected first front-wheel driving gear and a first front-wheel driven gear. The first front-wheel driving gear is meshed with the outer ring of the ring gear, the first front-wheel driven gear is meshed with the first differential, and the first differential is connected to the wheel axle of the front wheels of the vehicle.

[0010] Further, it further includes: a second motor, 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 meshes with a motor shaft gear on a second motor shaft of the second motor. The rear-wheel driven gear meshes with the second differential. The second differential is connected to a wheel axle of a rear wheel of the vehicle.

[0011] Further, a first disengaging mechanism is disposed between the first front-wheel transmission gear set and the wheel axle of the front wheel. The first disengaging mechanism is communicatively connected to the controller.

[0012] Further, a second disengaging mechanism is disposed between the second differential and the wheel axle of the rear wheel. The second disengaging mechanism is communicatively connected to the controller.

[0013] Further, 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 in D gear or P gear, a second parking power generation mode in N gear, 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 reverse mode, or a four-wheel reverse mode, where:

[0014] In the pure electric four-wheel drive mode, the first motor drives, the braking mechanism disengages, the first disengaging mechanism engages, and at the same time, the second motor drives and the engine stops, and the locking mechanism engages;

[0015] In the pure electric front-wheel drive mode, the first motor drives, the braking mechanism disengages, the first disengaging mechanism engages, and at the same time, the second motor idles or stops, the engine stops, and the locking mechanism engages;

[0016] In the pure electric rear-wheel drive mode, the first motor stops, the engine stops, the second motor drives, and at the same time, the braking mechanism engages, the locking mechanism disengages, and the first disengaging mechanism disengages;

[0017] In the extended-range rear-wheel drive mode, the engine is used to drive the first motor to generate electricity, the second motor drives, the braking mechanism engages, the locking mechanism disengages, and the first disengaging mechanism disengages;

[0018] In the first parking power generation mode, the engine is used to drive the first motor to generate electricity, the second motor stands by, the braking mechanism engages, the locking mechanism disengages, and the first disengaging mechanism disengages;

[0019] In the second parking power generation mode, the engine is used to drive the first motor to generate electricity, the second motor stands by, the braking mechanism engages, the locking mechanism disengages, and the first disengaging mechanism engages;

[0020] In the extended-range four-wheel drive mode, the braking mechanism is disengaged, the locking mechanism is disengaged, the first disengagement mechanism is engaged, the engine generates electricity while directly driving, the first motor generates electricity, and the second motor drives;

[0021] In the extended-range front-wheel drive mode, the braking mechanism is disengaged, the locking mechanism is disengaged, the first disengagement mechanism is engaged, the engine generates electricity while directly driving, the first motor generates electricity, and the second motor idles or stops;

[0022] In the parallel four-wheel drive mode, the braking mechanism is disengaged, the locking mechanism is disengaged, the first disengagement mechanism is engaged, the engine is used for direct drive, and at the same time, the first motor is controlled for stepless speed regulation, and the second motor drives;

[0023] In the engine direct drive mode, the braking mechanism is disengaged, the locking mechanism is disengaged, the first disengagement mechanism is engaged, the engine is used for direct drive, and at the same time, the first motor is controlled for stepless speed regulation, and the second motor idles or stops;

[0024] In the rear-wheel drive reverse mode, the braking mechanism is engaged, the locking mechanism is disengaged, the first disengagement mechanism is disengaged, the engine stops or is used for power generation, the first motor stops or generates electricity, and the second motor drives in reverse;

[0025] In the four-wheel drive reverse mode, the braking mechanism is disengaged, the locking mechanism is engaged, the first disengagement mechanism is engaged, the engine stops, the first motor drives in reverse, and the second motor drives in reverse.

[0026] Furthermore, it further includes a second front-wheel transmission gear set and a first differential. The second front-wheel transmission gear set includes a second front-wheel driving gear, a third front-wheel driving gear, a second front-wheel driven gear, and a shifting mechanism. The end of the ring gear extending towards the first motor is also connected with a ring gear gear. The second front-wheel driving gear meshes with the outer ring of the ring gear, the third front-wheel driving gear meshes with the ring gear gear, the shifting mechanism is connected with the second front-wheel driven gear, the second front-wheel driven gear meshes with the first differential, the first differential is connected with the wheel axle of the front wheels of the vehicle, and the shifting mechanism includes a first gear, a second gear, and a neutral gear, where:

[0027] When the shifting mechanism is in the first gear, control the shifting mechanism to mesh with the second front-wheel driving gear; or

[0028] When the shifting mechanism is in the second gear, control the shifting mechanism to mesh with the third front-wheel driving gear; or

[0029] When the shifting mechanism is in the neutral gear, control the shifting mechanism, the second front-wheel driving gear, and the third front-wheel driving gear to be disengaged.

[0030] Furthermore, the hybrid power system includes: pure electric four-wheel drive mode, pure electric front-wheel drive mode, pure electric rear-wheel drive mode, range-extended rear-wheel drive mode, the first parking power generation mode in D gear braking or P gear, the second parking power generation mode in N gear, range-extended four-wheel drive mode, range-extended front-wheel drive mode, parallel four-wheel drive mode, engine direct drive mode, rear-wheel reverse mode, or four-wheel reverse mode, where:

[0031] In the pure electric four-wheel drive mode, the first motor drives, the braking mechanism disengages, the shifting mechanism engages the first or second gear, at the same time the second motor drives, the engine stops, and the locking mechanism engages;

[0032] In the pure electric front-wheel drive mode, the first motor drives, the braking mechanism disengages, the shifting mechanism engages the first or second gear, at the same time the second motor idles or stops, the engine stops, and the locking mechanism engages;

[0033] In the pure electric rear-wheel drive mode, the first motor stops, the engine stops, the second motor drives, at the same time, the braking mechanism engages, the locking mechanism disengages, and the shifting mechanism is in neutral;

[0034] In the range-extended rear-wheel drive mode, the engine is used to drive the first motor to generate electricity, the second motor drives, the braking mechanism engages, the locking mechanism disengages, and the shifting mechanism is in neutral;

[0035] In the first parking power generation mode, the engine is used to drive the first motor to generate electricity, the second motor stands by, the braking mechanism engages, the locking mechanism disengages, and the shifting mechanism is in neutral;

[0036] In the second parking power generation mode, the engine is used to drive the first motor to generate electricity, the second motor stands by, the braking mechanism engages, the locking mechanism disengages, and the shifting mechanism is in the first or second gear;

[0037] In the range-extended four-wheel drive mode, the braking mechanism disengages, the locking mechanism disengages, the shifting mechanism engages the first or second gear, the engine drives directly and generates electricity at the same time, the first motor generates electricity, and the second motor drives;

[0038] In the range-extended front-wheel drive mode, the braking mechanism disengages, the locking mechanism disengages, the shifting mechanism engages the first or second gear, the engine drives directly and generates electricity at the same time, the first motor generates electricity, and the second motor idles or stops;

[0039] In the parallel four-wheel drive mode, the braking mechanism disengages, the locking mechanism disengages, the shifting mechanism engages the first or second gear, the engine is used for direct drive, at the same time the first motor is controlled for stepless speed regulation, and the second motor drives;

[0040] In the engine direct drive mode, the braking mechanism disengages, the locking mechanism disengages, the shifting mechanism engages the first or second gear, the engine is used for direct drive, at the same time the first motor is controlled for stepless speed regulation, and the second motor idles or stops;

[0041] In the rear-wheel drive reverse mode, the braking mechanism is engaged, the locking mechanism is disengaged, the shifting mechanism is in neutral, the engine stops or is used for power generation, the first motor stops or generates power, and the second motor drives in reverse;

[0042] In the four-wheel drive reverse mode, the braking mechanism is disengaged, the locking mechanism is engaged, the shifting mechanism is engaged in the first or second gear, the engine stops, the first motor drives in reverse, and the second motor drives in reverse.

[0043] Furthermore, the controller includes: a vehicle controller, an engine controller, a first motor controller, and a second motor controller. The vehicle controller is communicatively connected to the engine controller, the first motor controller, and the second motor controller respectively. The engine controller is communicatively connected to the engine. The first motor controller is communicatively connected to the first motor and the braking mechanism respectively. The second motor controller is communicatively connected to the second motor.

[0044] Furthermore, it further includes a ring gear speed sensor for detecting the speed of the ring gear. The ring gear speed sensor is communicatively connected to the vehicle controller.

[0045] In the present invention, the engine is connected to the first motor through a planetary gear mechanism, and the ring gear of the planetary processing mechanism is locked or unlocked through a braking mechanism. When the ring gear is locked, the motor can generate power as a generator. Due to the speed increasing ratio of the planetary gear, both the motor and the engine work in the high-efficiency area, improving the energy-saving effect. After the ring gear is unlocked, the engine can charge the first motor while driving the vehicle, realizing charging while driving, thus saving a driving motor and reducing the overall space layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a system schematic diagram of a hybrid power system according to an embodiment of the present invention;

[0047] Figure 2 It is a system schematic diagram of a hybrid power system according to another embodiment of the present invention;

[0048] Figure 3 It is an electrical topology diagram of a hybrid power system according to another embodiment of the present invention;

[0049] Figure 4 It is a control block diagram of a hybrid power system according to another embodiment of the present invention;

[0050] Figure 5a It is a system schematic diagram of the pure electric four-wheel drive mode according to the best embodiment of the present invention;

[0051] Figure 5b It is a speed relationship diagram of the pure electric four-wheel drive mode according to the best embodiment of the present invention;

[0052] Figure 6a System schematic diagram of the pure electric front-wheel drive mode of the best embodiment of the present invention;

[0053] Figure 6b Revolution speed relationship diagram of the pure electric front-wheel drive mode of the best embodiment of the present invention;

[0054] Figure 7a System schematic diagram of the pure electric rear-wheel drive mode of the best embodiment of the present invention;

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

[0056] Figure 8a System schematic diagram of the range-extended rear-wheel drive mode of the best embodiment of the present invention;

[0057] Figure 8b Revolution speed relationship diagram of the range-extended rear-wheel drive mode of the best embodiment of the present invention;

[0058] Figure 9a System schematic diagram of the parking power generation mode of the best embodiment of the present invention;

[0059] Figure 9b Revolution speed relationship diagram of the parking power generation mode of the best embodiment of the present invention;

[0060] Figure 10a System schematic diagram of the range-extended four-wheel drive mode of the best embodiment of the present invention;

[0061] Figure 10b Revolution speed relationship diagram of the range-extended four-wheel drive mode of the best embodiment of the present invention;

[0062] Figure 11a System schematic diagram of the range-extended front-wheel drive mode of the best embodiment of the present invention;

[0063] Figure 11b Revolution speed relationship diagram of the range-extended front-wheel drive mode of the best embodiment of the present invention;

[0064] Figure 12a System schematic diagram of the parallel four-wheel drive mode of the best embodiment of the present invention;

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

[0066] Figure 13a System schematic diagram of the engine direct drive mode of the best embodiment of the present invention;

[0067] Figure 13b Revolution speed relationship diagram of the engine direct drive mode of the best embodiment of the present invention;

[0068] Figure 14a System schematic diagram of the rear-wheel drive reverse mode for the best embodiment of the present invention;

[0069] Figure 14b Revolution speed relationship diagram of the rear-wheel drive reverse mode for the best embodiment of the present invention;

[0070] Figure 15a System schematic diagram of the four-wheel drive reverse mode for the best embodiment of the present invention;

[0071] Figure 15b Revolution speed relationship diagram of the four-wheel drive reverse mode for the best embodiment of the present invention;

[0072] Figure 16 Schematic diagram of the efficient area distribution of the first motor and the second motor for the best embodiment of the present invention;

[0073] Figure 17 System schematic diagram of a hybrid power system for another embodiment of the present invention;

[0074] Figure 18a System schematic diagram of the pure electric four-wheel drive mode for another embodiment of the present invention;

[0075] Figure 18b Revolution speed relationship diagram of the pure electric four-wheel drive mode for another embodiment of the present invention;

[0076] Figure 19a System schematic diagram of the pure electric front-wheel drive mode for another embodiment of the present invention;

[0077] Figure 19b Revolution speed relationship diagram of the pure electric front-wheel drive mode for another embodiment of the present invention;

[0078] Figure 20a System schematic diagram of the pure electric rear-wheel drive mode for another embodiment of the present invention;

[0079] Figure 20b Revolution speed relationship diagram of the pure electric rear-wheel drive mode for another embodiment of the present invention;

[0080] Figure 21a System schematic diagram of the range-extended rear-wheel drive mode for another embodiment of the present invention;

[0081] Figure 21b Revolution speed relationship diagram of the range-extended rear-wheel drive mode for another embodiment of the present invention;

[0082] Figure 22a System schematic diagram of the parking power generation mode for another embodiment of the present invention;

[0083] Figure 22b Revolution speed relationship diagram of the parking power generation mode for another embodiment of the present invention;

[0084] Figure 23a System schematic diagram of the range-extended four-wheel drive mode for another embodiment of the present invention;

[0085] Figure 23b Rotational speed relationship diagram of the range-extended four-wheel drive mode for another embodiment of the present invention;

[0086] Figure 24a System schematic diagram of the range-extended front-wheel drive mode for another embodiment of the present invention;

[0087] Figure 24b Rotational speed relationship diagram of the range-extended front-wheel drive mode for another embodiment of the present invention;

[0088] Figure 25a System schematic diagram of the parallel four-wheel drive mode for another embodiment of the present invention;

[0089] Figure 25b Rotational speed relationship diagram of the parallel four-wheel drive mode for another embodiment of the present invention;

[0090] Figure 26a System schematic diagram of the engine direct drive mode for another embodiment of the present invention;

[0091] Figure 26b Rotational speed relationship diagram of the engine direct drive mode for another embodiment of the present invention;

[0092] Figure 27a System schematic diagram of the rear-wheel drive reverse mode for another embodiment of the present invention;

[0093] Figure 27b Rotational speed relationship diagram of the rear-wheel drive reverse mode for another embodiment of the present invention;

[0094] Figure 28a System schematic diagram of the four-wheel drive reverse mode for another embodiment of the present invention;

[0095] Figure 28b Rotational speed relationship diagram of the four-wheel drive reverse mode for another embodiment of the present invention.

[0096] Marking description

[0097] 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 gear; 34. Planet gear; 4. Braking mechanism; 5. Locking mechanism; 6. First front-wheel drive gear set; 61. First front-wheel driving gear; 62. First front-wheel driven gear; 7. First differential; 8. First disengaging mechanism; 9. Second motor; 901. Second motor shaft; 802. Motor shaft gear; 10. Front wheel; 11. Rear wheel; 12. Rear-wheel drive 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 drive gear set; 181. Second front-wheel driving gear; 182. Third front-wheel driving gear; 183. Second front-wheel driven gear; 184. Shifting mechanism; 19. High-voltage battery; 20. Battery management system; 100. Vehicle body. Detailed implementation manners

[0098] The following further describes the detailed implementation manners of the present invention with reference to the drawings. The same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0099] As Figure 1 shown in the system schematic diagram of a hybrid power system according to an embodiment of the present invention, which includes: an engine 1, a first motor 2, a planetary gear mechanism 3 and a controller. The planetary gear mechanism 3 includes a sun gear 31, a planet carrier 32, a ring gear 33 and a plurality of planet gears 34. The plurality of planet gears 34 are installed on the planet carrier 32, and the planet gears 34 are respectively meshed with the sun gear 31 and the inner ring of the ring gear 33;

[0100] 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 braking mechanism 4 for locking or unlocking the ring gear 33 is installed on the ring gear 33;

[0101] The engine 1, the first motor 2 and the braking mechanism 4 are communicatively connected to the controller.

[0102] Specifically, the engine 1 is connected to the planet carrier 32 as a power output.

[0103] In some embodiments, the engine input shaft of the engine 1 is connected to the planet carrier 32.

[0104] In some embodiments, the carrier 32 serves as the engine input shaft and is connected to the engine.

[0105] The first motor shaft 201 of the first motor 2 is connected to the sun gear 31. Through the cooperation of the sun gear 31, the carrier 32, the ring gear 33 and multiple planet gears 34, power output is achieved. Among them, the sun gear 31 meshes with the planet 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 by controlling the engine 1 and the first motor 2, multiple working modes are realized.

[0106] 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 engine speed of the engine 1.

[0107] Among them, when the brake mechanism 4 locks the ring gear 33, the engine 1 drives the first motor 2 to generate electricity through the carrier 32 and the sun gear 31. At the same time, due to the speed increasing ratio of the planetary gears, both the engine 1 and the first motor 2 operate in the high-efficiency region, improving the energy-saving effect. At the same time, it can also improve the problem of uneven load of the speed increasing gears, achieving lower noise and longer durability life.

[0108] When the brake mechanism 4 unlocks the ring gear 33, the ring gear 33 serves as the power output. Therefore, part of the power of the engine 1 drives the sun gear 31 through the carrier 32, thereby driving the first motor 2 to generate electricity. By controlling the speed of the first motor 2, the speed ratio is adjusted to achieve stepless speed regulation. On the other hand, the power of the engine 1 drives the ring gear 33 through the carrier 32 to output driving torque and drive the vehicle.

[0109] 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 the moving state and can disengage with torque.

[0110] In some embodiments, the engine 1 is equipped with a low-voltage starter. The low-voltage starter can quietly and smoothly start the engine 1 when the first motor 2 is used for driving.

[0111] 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 generate electricity as a generator. Due to the speed increasing ratio of the planetary gears, both the motor and the engine operate in the high-efficiency region, improving the energy-saving effect. After the ring gear is unlocked, the engine can charge the first motor while driving the vehicle, realizing charging while driving, thereby saving a driving motor and reducing the overall space layout. It can also adjust the high-efficiency working point of the engine according to the real-time vehicle speed by using the generator speed regulation, thereby bringing the effect of fuel consumption saving.

[0112] 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 communicatively connected to the engine controller 15 and the first motor controller 16 respectively. The engine controller 15 is connected to the engine 1, and the first motor controller 16 is connected to the first motor 2 and the braking mechanism 4 respectively.

[0113] Specifically, as Figure 3 and Figure 4 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. Among them, the vehicle controller 14 receives the throttle pedal opening signal, the vehicle acceleration signal, the state of charge (SOC) of the battery, the planetary gear ring speed signal, the left and right front wheel speed signals, and the environment and road condition recognition signal. 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. The first motor controller 16 controls the braking mechanism 4 to lock or unlock and controls the speed of the first motor 2 according to the received torque command, speed command, etc.

[0114] As Figure 2 , Figure 3 and Figure 4 shown, another embodiment of the present invention provides a hybrid power system, including: an engine 1, a first motor 2, a planetary gear mechanism 3, a first front wheel drive gear set 6, a first differential 7, a second motor 9, a rear wheel drive gear set 12, a second differential 13, and a controller. The planetary gear mechanism 3 includes a sun gear 31, a planet carrier 32, a ring gear 33, and a plurality of planet gears 34. The plurality of planet gears 34 are installed on the planet carrier 32, and the planet gears 34 are respectively meshed with the sun gear 31 and the inner ring of the ring gear 33;

[0115] 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 braking mechanism 4 for locking or unlocking the ring gear 33 is installed on the ring gear 33;

[0116] The engine 1, the first motor 2, and the braking mechanism 4 are communicatively connected to the controller;

[0117] A locking mechanism 5 for locking or unlocking the planet carrier 32 is installed on the planet carrier 32, and the locking mechanism 5 is communicatively connected to the controller;

[0118] The first front-wheel drive gear set 6 includes a connected first front-wheel driving gear 61 and a first front-wheel driven gear 62. The first front-wheel driving gear 61 meshes with the outer ring of the ring gear 33. The first front-wheel driven gear 62 meshes with the first differential 7, and the first differential 7 is connected to the axle of the vehicle's front wheels 10;

[0119] A first disengaging mechanism 8 is provided between the first front-wheel drive gear set 6 and the axle of the front wheels 10. The first disengaging mechanism 8 is communicatively connected to the controller;

[0120] The hybrid power system further includes a ring gear speed sensor for detecting the speed of the ring gear 33. The ring gear speed sensor is communicatively connected to the vehicle controller 14;

[0121] The second motor 9 is connected to the rear wheels 11 of the vehicle. The rear-wheel drive gear set 12 includes a connected rear-wheel driving gear 121 and a rear-wheel driven gear 122. The rear-wheel driving gear 121 meshes with the motor shaft gear 902 on the second motor shaft 901 of the second motor 9. The rear-wheel driven gear 122 meshes with the second differential 13, and the second differential 13 is connected to the axle of the vehicle's rear wheels 11;

[0122] 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 connected to the engine 1. The first motor controller 16 is communicatively connected to the first motor 2 and the braking mechanism 4 respectively. The second motor controller 17 is connected to the second motor 9.

[0123] Specifically, the hybrid power 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. 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 by a planetary gear mechanism 3. The braking mechanism 4 locks or unlocks the ring gear 33, and the locking mechanism 5 locks or unlocks the planet carrier 32. By controlling the braking mechanism 4, the locking mechanism 5, the first motor 2, the engine 1, and the second motor 9, multiple working modes can be achieved.

[0124] 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 an existing clutch with control functions. For example, an electromagnetic clutch, a hydraulic clutch, or a one-way clutch that can change the locking direction, etc.

[0125] 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 both in the forward and reverse directions. By locking the planet carrier 32, the engine can be stopped, and the front wheels can be driven by the first motor 2. Compared with using a one-way clutch to control between the planet carrier and the engine, however, since the one-way clutch can only lock in a single direction. Therefore, when the one-way clutch can only lock in the forward direction and cannot lock in the reverse direction, it cannot lock when reversing, resulting in the inability to reverse through the first motor 2. The four-wheel drive motor cannot drive in reverse. And the locking mechanism adopted in this embodiment is used. The locking mechanism does not limit locking in the forward or reverse direction. Therefore, when reverse is needed, the planet carrier 32 can be locked, and the first motor 2 can be used to drive in reverse, thus realizing four-wheel drive motor reverse.

[0126] Among them, 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 meshes 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 meshes with the first differential 7. The first front-wheel driving gear 61 and the first front-wheel driven gear 62 rotate together.

[0127] A first disengaging mechanism 8 is provided between the first front-wheel transmission gear set 6 and the axle of the front wheel 10.

[0128] Specifically, a first disengaging mechanism 8 is provided between the first front-wheel transmission gear set 6 and the first differential 7; or

[0129] A first disengaging mechanism 8 is provided between the first differential 7 and the axle of the front wheel 10.

[0130] In some embodiments, a first disengaging mechanism 8 is provided between the first differential 7 and the front wheel 10. The first disengaging mechanism 8 controls the separation or engagement of the first differential 7 and the front wheel 10. Through the first disengaging mechanism 8, the oil churning loss of the reducer and the drag loss of the permanent magnet motor are reduced. Among them, the first disengaging mechanism 8 controls the engagement or separation of the first front-wheel transmission gear set 6 and the first differential 7. Or the first disengaging mechanism 8 controls the engagement or separation of the first differential 7 and the front wheel 10. The first disengaging mechanism 8 is an existing disengaging mechanism that can realize the engagement or separation of the differential and the wheel end; or the first disengaging mechanism 8 is an existing disengaging mechanism that can realize the engagement or separation of the differential and the transmission gear.

[0131] In some embodiments, a second disengaging mechanism is provided between the second differential 13 and the axle of the rear wheel 11. The second disengaging mechanism is communicatively connected to the controller. The second disengaging mechanism controls the engagement or separation of the second differential 13 and the rear wheel 11. The second disengaging mechanism is an existing disengaging mechanism that can realize the engagement or separation of the differential and the transmission gear set.

[0132] The controller includes: a vehicle controller 14, an engine controller 15, a first motor controller 16, and a second motor controller 17. Among them, the vehicle controller 14 receives the throttle pedal signal, vehicle acceleration signal, state of charge of the battery, ring gear speed signal, front wheel speed signal, and other diagnostic signals. 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 braking mechanism 4, the locking or unlocking of the locking mechanism 5, and the position of the first disconnecting mechanism 8 according to the received torque command and speed command, etc., to achieve separation or engagement. At the same time, it also controls the speed of the first motor 2 and receives the speed and temperature signals of the first motor 2 and the position signal of the first disconnecting 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 signals 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.

[0133] The hybrid system further includes a ring gear speed sensor for detecting the 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 speed of the ring gear 33 for use in the control strategy. On the one hand, it can be used to calculate the speed of the engine, and on the other hand, it can be used as a reference for adjusting the speed difference when the disconnecting mechanism is engaged.

[0134] In some embodiments, the hybrid system further includes a position sensor for detecting the position of the first disconnecting mechanism 8. The position sensor is communicatively connected to the controller.

[0135] At the same time, 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.

[0136] By setting up a front-wheel drive unit and a rear-wheel drive unit, multiple combined working modes of front-wheel drive, electric rear-wheel drive, and four-wheel drive of the vehicle can be established.

[0137] In one of the embodiments, the hybrid 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 when the vehicle is in D gear braking or P gear (where D gear is the forward gear and P gear is the parking gear), a second parking power generation mode when the vehicle is in N gear (N gear is the neutral gear), 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, or a four-wheel drive reverse mode.

[0138] The specific modes are as follows:

[0139]

[0140]

[0141] Among them, stopping means the machine stops rotating, and restarting requires time for engagement. Standby means the state where it can be started at any time in the parked state. Idling means that torque can be continuously applied at any time.

[0142] As Figure 5a and Figure 5b shown, in the pure electric four-wheel drive mode, the first motor 2 drives, driving the sun gear 31, the braking mechanism 4 disengages, unlocking the ring gear 33, the first disengagement mechanism 8 engages, the ring gear 33 rotates to drive the front wheels 10, and at the same time the second motor 9 drives, driving the rear wheels 11 to achieve four-wheel drive. If a second disengagement mechanism is set, the second disengagement mechanism engages. At this time, the engine 1 stops rotating, and the locking mechanism 5 engages, locking the planetary carrier 32.

[0143] As Figure 6a and Figure 6b shown, in the pure electric front-wheel drive mode, the first motor 2 drives, driving the sun gear 31, the braking mechanism 4 disengages, unlocking the ring gear 33, the first disengagement mechanism 8 engages, the ring gear 33 rotates to drive the front wheels 10, and at the same time the second motor 9 idles or stops rotating to achieve front-wheel drive. If a second disengagement mechanism is set, the second disengagement mechanism disengages. At this time, the engine 1 stops rotating, and the locking mechanism 5 engages, locking the planetary carrier 32.

[0144] As Figure 7a and Figure 7b shown, in the pure electric rear-wheel drive mode, the first motor 2 stops rotating, the engine 1 stops rotating, the second motor 9 drives, driving the rear wheels 11 to achieve rear-wheel drive. If a second disengagement mechanism is set, the second disengagement mechanism engages. At the same time, the braking mechanism 4 engages to lock the ring gear 33, the locking mechanism 5 disengages, and the first disengagement mechanism 8 also disengages. Since the first disengagement mechanism 8 disengages, the loss caused by the first motor 2 being dragged can be reduced, achieving the effect of saving power consumption.

[0145] As Figure 8a and Figure 8b shown, in the range-extended rear-wheel drive mode, the engine 1 is used to drive the first motor 2 to generate electricity, and the second motor 9 drives the rear wheels 11. If a second disengagement mechanism is set, the second disengagement mechanism engages. At this time, the braking mechanism 4 engages to lock the ring gear 33, the locking mechanism 5 disengages, and the first disengagement mechanism 8 also disengages. When the battery power is low, the first motor 2 mainly generates electricity. At the same time, due to the speed increase ratio of the planetary gear, the engine 1 and the first motor 2 can work in the high-efficiency area at the same time, achieving the effect of saving fuel consumption.

[0146] AsFigure 9a and Figure 9b As shown in Figure 9b , in the first parking power generation mode (D gear braking or P gear), the engine 1 is used to drive the first motor 2 to generate electricity, the second motor 9 is on standby, and if the second disengaging mechanism is set, the second disengaging mechanism engages. At this time, the braking mechanism 4 engages to lock the ring gear 33, the locking mechanism 5 disengages, and the first disengaging mechanism 8 also disengages.

[0147] In addition, in the second parking power generation mode (vehicle in N gear), the engine 1 is used to drive the first motor 2 to generate electricity, the second motor 9 is on standby, and if the second disengaging mechanism is set, the second disengaging mechanism engages. At this time, the braking mechanism 4 engages to lock the ring gear 33, the locking mechanism 5 disengages, and the first disengaging mechanism 8 engages, which can be used for parking in N gear. At this time, due to the locking of the ring gear 33, locking force is provided for the vehicle, which is equivalent to parking in P gear.

[0148] As Figure 10a and Figure 10b shown in Figure 10b , in the range-extended four-wheel drive mode, the braking mechanism 4 disengages to unlock the ring gear 33, the locking mechanism 5 disengages, the first disengaging mechanism 8 engages, the engine 1 generates electricity while directly driving, the first motor 2 generates electricity, and the second motor 9 drives to achieve four-wheel drive. If the second disengaging mechanism is set, the second disengaging mechanism engages. Among them, direct drive means that the engine 1 directly drives the vehicle.

[0149] As Figure 11a and Figure 11b shown in Figure 11b , in the range-extended front-wheel drive mode, the braking mechanism 4 disengages to unlock the ring gear 33, the locking mechanism 5 disengages, the first disengaging mechanism 8 engages, the engine 1 generates electricity while directly driving, the first motor 2 generates electricity, and the second motor 9 idles or stops to achieve front-wheel drive. If the second disengaging mechanism is set, the second disengaging mechanism disengages.

[0150] As Figure 12a and Figure 12b shown in Figure 12b , in the parallel four-wheel drive mode, the braking mechanism 4 disengages to unlock the ring gear 33, the locking mechanism 5 disengages, the first disengaging mechanism 8 engages, the engine 1 is used for direct drive, and at the same time, the first motor 2 is controlled for stepless speed regulation, and the second motor 9 drives to achieve four-wheel drive. If the second disengaging mechanism is set, the second disengaging mechanism engages.

[0151] As Figure 13a and Figure 13b shown in Figure 13b , in the engine direct drive mode, the braking mechanism 4 disengages to unlock the ring gear 33, the locking mechanism 5 disengages, the first disengaging mechanism 8 engages, the engine 1 is used for direct drive, and at the same time, the first motor 2 is controlled for stepless speed regulation, and the second motor 9 idles or stops, and the vehicle is only driven by the engine. If the second disengaging mechanism is set, the second disengaging mechanism disengages.

[0152] As Figure 14a and Figure 14bAs shown, in the rear-wheel drive reverse mode, the braking mechanism 4 engages to lock the ring gear 33, the locking mechanism 5 disengages, the first disengagement mechanism 8 disengages, the engine 1 shuts down or is used for power generation, the first motor 2 shuts down or generates power, the second motor 9 drives in reverse, and the vehicle reverses through the rear wheels 11. If a second disengagement mechanism is provided, the second disengagement mechanism engages.

[0153] As Figure 15a and Figure 15b shown, in the four-wheel drive reverse mode, the braking mechanism 4 disengages to unlock the ring gear 33, the locking mechanism 5 engages, the first disengagement mechanism 8 engages, the engine 1 shuts down, the first motor 2 drives in reverse, the second motor 9 drives in reverse, and four-wheel reverse is achieved. If a second disengagement mechanism is provided, the second disengagement mechanism engages.

[0154] Among them, in each rotational speed relationship diagram, the arrow indicates that the rotational speed is the driving rotational speed, indicating that the rotational speed is locked.

[0155] The mode switching principle is as follows:

[0156] When strong power or getting out of trouble is required, 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.

[0157] When the battery power is high, the first motor 2 is mainly used for driving.

[0158] The engine direct drive mode is mainly used in working conditions where the engine direct drive efficiency is relatively good. At this time, the first motor 2 is mainly used for continuously variable speed regulation of the power of the engine 1, adjusting the working point of the engine 1 to a high-efficiency rotational speed, and achieving the effect of fuel consumption savings. Specifically, the first motor is controlled to make adjustments according to the characteristics of the planetary gear. After the vehicle speed is determined, the rotational speed of the engine can be kept within the optimal fuel consumption range by adjusting the rotational speed of the first motor. 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 area.

[0159] As Figure 16 shown, in some embodiments, the high-efficiency area distributions of the first motor 2 and the second motor 9 are designed differently. Thus, pure electric front-wheel drive or pure electric rear-wheel drive can be switched according to the vehicle working conditions, ensuring high-efficiency operation in a wider range of working conditions.

[0160] When driving on a flat road, a more efficient power source can be matched according to the load working conditions, and the front-wheel drive or rear-wheel drive mode can be selected to achieve the purpose of saving power consumption.

[0161] In addition, since the motor serves both as a generator and a driver, the designed rotational speed of the motor in this embodiment is relatively high. For efficient power generation, the power generation speed ratio γ of this embodiment is less than 1 to cooperate with the high-speed motor. Due to the high rotational speed of the motor, the pure electric four-wheel drive vehicle speed is not limited. Moreover, with a high rotational speed and a wide speed regulation range, the motor allows for low-speed high-power running.

[0162] As Figure 17 shown, another embodiment of the present invention provides a hybrid power system, including: an engine 1, a first motor 2, a planetary gear mechanism 3, a second front-wheel drive gear set 18, a first differential 7, a second motor 9, a rear-wheel drive gear set 12, a second differential 13, and a controller. The planetary gear mechanism 3 includes a sun gear 31, a planet carrier 32, a ring gear 33, and a plurality of planet gears 34. The plurality of planet gears 34 are installed on the planet carrier 32, and the planet gears 34 are respectively meshed with the sun gear 31 and the inner ring of the ring gear 33.

[0163] 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 braking mechanism 4 for locking or unlocking the ring gear 33 is installed on the ring gear 33.

[0164] The engine 1, the first motor 2, and the braking mechanism 4 are communicatively connected to the controller.

[0165] A locking mechanism 5 for locking or unlocking the planet carrier 32 is installed on the planet carrier 32, and the locking mechanism 5 is communicatively connected to the controller.

[0166] The second front-wheel drive 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. An end of the ring gear 33 extending towards the first motor 2 is further connected with a ring gear 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 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. The first differential 7 is connected to the axle of the front wheels 10 of the vehicle. The shifting mechanism 184 includes a first gear, a second gear, and a neutral gear, where:

[0167] When the shifting mechanism 184 is in the first gear, control the shifting mechanism 184 to be meshed with the second front-wheel driving gear 181; or

[0168] When the shifting mechanism 184 is in the second gear, control the shifting mechanism 184 to be meshed with the third front-wheel driving gear 182; or

[0169] When the shift mechanism 184 is in neutral, control the separation of the shift mechanism 184, the second front-wheel drive gear 181, and the third front-wheel drive gear 182;

[0170] 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.

[0171] The second motor 9 is connected to the rear wheels 11 of the vehicle, and the rear-wheel drive gear set 12 meshes with the second motor shaft 901 of the second motor 9 and the second differential 13 respectively;

[0172] 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 connected to the engine 1. The first motor controller 16 is communicatively connected to the first motor 2 and the braking mechanism 4 respectively. The second motor controller 17 is connected to the second motor 9.

[0173] Specifically, in this embodiment, a second front-wheel drive gear set 18 is adopted, and a ring gear gear 331 is connected to the end of the ring gear 33 extending towards the first motor 2. In order to reduce the overall volume, the first motor 2 can adopt an axial-flux motor to reduce the size.

[0174] The second front-wheel drive gear set 18 includes a second front-wheel drive gear 181, a third front-wheel drive gear 182, a second front-wheel driven gear 183, and a shift mechanism 184. The second front-wheel drive gear 181 and the third front-wheel drive gear 182 are sleeved on the shaft, and the second front-wheel drive gear 181 meshes with the outer ring of the ring gear 33, the third front-wheel drive gear 182 meshes with the ring gear gear 331. The shift mechanism 184 is connected to the second front-wheel driven gear 183. The second front-wheel driven gear 183 meshes with the first differential 7. The first differential 7 is connected to the axle of the front wheels 10 of the vehicle.

[0175] When the shift mechanism 184 is in the first gear, control the shift mechanism 184 to mesh with the second front-wheel drive gear 181; or

[0176] When the shift mechanism 184 is in the second gear, control the shift mechanism 184 to mesh with the third front-wheel drive gear 182; or

[0177] When the shift mechanism 184 is in neutral, control the separation of the shift mechanism 184, the second front-wheel drive gear 181, and the third front-wheel drive gear 182.

[0178] As Figure 17 shown, the controller controls the left - right movement of the shift mechanism 184. 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., the 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., the 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 disengaged to be in neutral.

[0179] The shift mechanism 184 can adopt a synchronizer or a clutch, and the neutral position can be regarded as a disengaging mechanism. Therefore, the disengaging mechanism between the first differential 7 and the front wheels 10 can be omitted.

[0180] Among them, the speed ratio of the third front - wheel driving gear 182 to the ring - gear gear 331 is greater than the speed ratio of the second front - wheel driving gear 181 to the outer ring 33 of the ring - gear.

[0181] This embodiment provides speed ratios of two gears with different sizes, and the neutral gear can replace the differential disengaging mechanism. The low gear realizes the large - torque output of the engine, expanding the application range of the engine, especially in hybrid four - wheel drive, engine direct - drive and other modes. The high gear is used at high speeds to increase the maximum vehicle speed driven by the engine. At the same time, when realizing two gears, the number of shaft systems remains unchanged and the axial dimension is comparable.

[0182] By setting the front - drive unit and the rear - drive unit, multiple combined working modes of the vehicle's front - drive, electric rear - drive, and four - wheel drive can be established.

[0183] In one of the embodiments, the hybrid power system includes: pure - electric four - wheel drive mode, pure - electric front - drive mode, pure - electric rear - drive mode, range - extender rear - drive mode, first parking power - generation mode in D - gear braking or P - gear, second parking power - generation mode in N - gear, range - extender four - wheel drive mode, range - extender front - drive mode, parallel four - wheel drive mode, engine direct - drive mode, rear - drive reverse mode, or four - wheel drive reverse mode.

[0184] The specific modes are as follows:

[0185]

[0186]

[0187] As Figure 18a to shown is a schematic diagram of the mode of the hybrid power system according to another embodiment of the present invention as Figure 17 shown. Specifically:

[0188] As Figure 18a and Figure 18bAs shown, in the pure electric four-wheel drive mode, the first motor 2 drives, driving the sun gear 31, the braking mechanism 4 disengages, unlocking the ring gear 33, the shifting mechanism 184 engages the first or second gear, the ring gear 33 and the ring gear gear 331 rotate to drive the front wheels 10, and at the same time the second motor 9 drives, driving the rear wheels 11 to achieve four-wheel drive. If the second disengagement mechanism is provided, the second disengagement mechanism engages. At this time, the engine 1 stops rotating, the locking mechanism 5 engages, locking the planet carrier 32.

[0189] As Figure 19a and Figure 19b shown, in the pure electric front-wheel drive mode, the first motor 2 drives, driving the sun gear 31, the braking mechanism 4 disengages, unlocking the ring gear 33, the shifting mechanism 184 engages the first or second gear, the ring gear 33 and the ring gear gear 331 rotate to drive the front wheels 10, and at the same time the second motor 9 idles or stops rotating to achieve front-wheel drive. If the second disengagement mechanism is provided, the second disengagement mechanism disengages. At this time, the engine 1 stops rotating, the locking mechanism 5 engages, locking the planet carrier 32.

[0190] As Figure 20a and Figure 20b shown, in the pure electric rear-wheel drive mode, the first motor 2 stops rotating, the engine 1 stops rotating, the second motor 9 drives, driving the rear wheels 11 to achieve rear-wheel drive. If the second disengagement mechanism is provided, the second disengagement mechanism engages. At the same time, the braking mechanism 4 engages to lock the ring gear 33, the locking mechanism 5 disengages, and the shifting mechanism 184 is in neutral. Since the shifting mechanism 184 is in neutral, the loss caused by the first motor 2 being dragged can be reduced, achieving the effect of saving power consumption.

[0191] As Figure 21a and Figure 21b shown, in the range-extended rear-wheel drive mode, the engine 1 is used to drive the first motor 2 to generate electricity, the second motor 9 drives the rear wheels 11, if the second disengagement mechanism is provided, the second disengagement mechanism engages. At this time, the braking mechanism 4 engages, locking the ring gear 33, the locking mechanism 5 disengages, and the shifting mechanism 184 is in neutral. When the battery power is low, the first motor 2 mainly generates electricity. At the same time, due to the speed increase ratio of the planetary gear, the engine 1 and the first motor 2 can work in the high-efficiency area at the same time, achieving the effect of saving fuel consumption.

[0192] As Figure 22a and Figure 22b shown, in the first parking power generation mode (D gear braking or P gear), the engine 1 is used to drive the first motor 2 to generate electricity, the second motor 9 stops rotating, if the second disengagement mechanism is provided, the second disengagement mechanism engages. At this time, the braking mechanism 4 engages, locking the ring gear 33, the locking mechanism 5 disengages, and the shifting mechanism 184 is in neutral.

[0193] In addition, in the second parking power generation mode (vehicle in N gear), the engine 1 is used to drive the first motor 2 to generate electricity, the second motor 9 stops rotating, and if the second disengagement mechanism is provided, the second disengagement mechanism engages. At this time, the braking mechanism 4 engages, locking the ring gear 33, and the locking mechanism 5 disengages. The shifting mechanism 184 is in the first or second gear and can be used for parking in N gear. At this time, since the ring gear 33 is locked, a locking force is provided for the vehicle, which is equivalent to parking in P gear.

[0194] As Figure 23a and Figure 23b shown, in the range-extended four-wheel drive mode, the braking mechanism 4 disengages, unlocking the ring gear 33, the locking mechanism 5 disengages, the shifting mechanism 184 engages the first or second gear, the engine 1 directly drives and generates electricity at the same time, the first motor 2 generates electricity, and the second motor 9 drives to achieve four-wheel drive. If the second disengagement mechanism is provided, the second disengagement mechanism engages.

[0195] As Figure 24a and Figure 24b shown, in the range-extended front-wheel drive mode, the braking mechanism 4 disengages, unlocking the ring gear 33, the locking mechanism 5 disengages, the shifting mechanism 184 engages the first or second gear, the engine 1 directly drives and generates electricity at the same time, the first motor 2 generates electricity, and the second motor 9 idles or stops rotating to achieve front-wheel drive. If the second disengagement mechanism is provided, the second disengagement mechanism disengages.

[0196] As Figure 25a and Figure 25b shown, in the parallel four-wheel drive mode, the braking mechanism 4 disengages, unlocking the ring gear 33, the locking mechanism 5 disengages, the shifting mechanism 184 engages the first or second gear, the engine 1 is used for direct drive, and at the same time, the first motor 2 is controlled for stepless speed regulation, and the second motor 9 drives to achieve four-wheel drive. If the second disengagement mechanism is provided, the second disengagement mechanism engages.

[0197] As Figure 26a and Figure 26b shown, in the engine direct drive mode, the braking mechanism 4 disengages, unlocking the ring gear 33, the locking mechanism 5 disengages, the shifting mechanism 184 engages the first or second gear, the engine 1 is used for direct drive, and at the same time, the first motor 2 is controlled for stepless speed regulation, and the second motor 9 idles or stops rotating, and the vehicle is only driven by the engine. If the second disengagement mechanism is provided, the second disengagement mechanism disengages.

[0198] As Figure 27a and Figure 27b shown, in the rear-wheel drive reverse mode, the braking mechanism 4 engages, locking the ring gear 33, the locking mechanism 5 disengages, the shifting mechanism 184 is in neutral, the engine 1 stops rotating or is used for power generation, the first motor 2 stops rotating or generates electricity, and the second motor 9 drives in reverse to reverse through the rear wheels 11. If the second disengagement mechanism is provided, the second disengagement mechanism engages.

[0199] As Figure 28a andFigure 28b As shown, in the four-wheel drive reverse mode, the braking mechanism 4 disengages, unlocking the ring gear 33, the locking mechanism 5 engages, the shifting mechanism 184 engages the first or second gear, the engine 1 stops running, the first motor 2 drives in reverse, and the second motor 9 drives in reverse to achieve four-wheel reverse. If a second disengagement mechanism is provided, the second disengagement mechanism engages.

[0200] Among them, in each rotational speed relationship diagram, the arrow indicates that the rotational speed is the driving rotational speed. It indicates that the rotational speed is locked.

[0201] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. A hybrid power system, characterized in that: include: 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); 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); The engine (1), the first motor (2) and the brake mechanism (4) are communicatively connected to the controller.

2. The hybrid power system according to claim 1, characterized in that: A locking mechanism (5) for locking or unlocking the planetary carrier (32) is installed on the planetary carrier (32), and the locking mechanism (5) is communicatively connected with the controller.

3. The hybrid power system according to claim 2, characterized in that: The vehicle further comprises a first front wheel transmission gear set (6) and a first differential (7), wherein 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, wherein the first front wheel driving gear (61) is meshed with the outer ring of the ring gear (33), and 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.

4. The hybrid power system according to claim 3, characterized in that: Also includes: A second motor (9), 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), and the second differential (13) is connected to the wheel axle of the rear wheel (11) of the vehicle.

5. The hybrid power system according to claim 4, characterized in that: 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), and the first disengagement mechanism (8) is communicatively connected with the controller.

6. The hybrid power system according to claim 4, characterized in that: 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 in communication connection with the controller.

7. The hybrid power system according to claim 5, characterized in that: 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: 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; 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; 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) engages, the locking mechanism (5) disengages, and the first disengagement mechanism (8) disengages; 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; 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 first disengagement mechanism (8) is disengaged; 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; 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; 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; 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; 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, while the second motor (9) is idling or stopped; 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 or used for generating electricity, the first motor (2) is stopped or used for generating electricity, and the second motor (9) is driven in reverse; In the four-wheel drive reverse mode, the brake mechanism (4) is disengaged, 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.

8. The hybrid power system according to claim 4, characterized in that: The vehicle further comprises a second front wheel transmission gear set (18) and a first differential (7), 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), wherein 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) meshes with the outer ring of the ring gear (33), the third front wheel driving gear (182) meshes 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) meshes with the first differential (7), the first differential (7) is connected to the wheel 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: 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); or When the gear shift mechanism (184) is in the second gear, controlling the gear shift mechanism (184) to mesh with the third front wheel driving gear (182); or 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.

9. The hybrid power system according to claim 8, characterized in that: 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: 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; 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; 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; 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; 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; In the second 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 first gear or second gear; 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) generates electricity while driving directly, the first motor (2) generates electricity, and the second motor (9) drives; 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) generates electricity while driving directly, the first motor (2) generates electricity, and the second motor (9) is idling or stopped; 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; 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 idling or stopped; 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 or used for generating electricity, the first motor (2) is stopped or used for generating electricity, and the second motor (9) is driven in reverse; 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.

10. The hybrid power system according to claim 4, characterized in that: The controller comprises: 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 connected in communication with the engine controller (15), the first motor controller (16) and the second motor controller (17); the engine controller (15) is connected in communication with the engine (1); the first motor controller (16) is respectively connected in communication with the first motor (2) and the brake mechanism (4); and the second motor controller (17) is connected in communication with the second motor (9).

11. The hybrid power system according to claim 10, characterized in that: It also 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).

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