Hybrid power assembly, vehicle and vehicle control method

Abstract

The invention relates to a hybrid power assembly, a vehicle and a vehicle control method. The hybrid power assembly can comprise an engine; the first motor can generate electricity under the driving of the engine; the speed change device comprises an input shaft; the planet row comprises a sun gear, a planet carrier with a planet gear and a gear ring, one of the sun gear, the planet carrier and the gear ring is connected to the first motor, one of the sun gear, the planet carrier and the gear ring is connected to the input shaft, and the other of the sun gear, the planet carrier and the gear ring is connected to the engine and selectively connected to the input shaft through a first coupling device. The first motor can adjust the power generation rotating speed according to the running rotating speed requirement of the wheel end so that the engine can be maintained in the target running rotating speed interval.

Description

[0001] This is a divisional application, the original application number is 202410526914.5, and the original application date is April 26, 2024. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of vehicles, in particular, to a hybrid power assembly, a vehicle and a vehicle control method. BACKGROUND

[0003] The hybrid vehicle has the form of fuel driving and electric energy driving, wherein the engine can output power to the wheel end through the transmission device (or called the transmission, the reducer, etc.), and can also drive the generator to generate electricity. In the related technology, for the vehicle which can output power through the internal combustion engine (i.e. the engine) and the motor, the engine speed, torque and the wheel end speed, torque cannot be decoupled, that is, they are usually linearly related, which will make the engine unable to work in the high efficiency area for a long time. SUMMARY

[0004] The purpose of the present disclosure is to provide a hybrid power assembly, a vehicle and a vehicle control method to at least partially solve the problems existing in the above-mentioned related technology.

[0005] In order to achieve the above-mentioned purpose, the first aspect of the embodiment of the present disclosure provides a hybrid power assembly, comprising: an engine; a first motor capable of generating electricity under the driving of the engine; a transmission device comprising an input shaft; a planetary gear set comprising a sun gear, a planet carrier having a planet gear, and a ring gear, wherein one of the sun gear, the planet carrier and the ring gear is connected to the first motor, one is connected to the input shaft, and the other is connected to the engine and selectively connected to the input shaft through a first coupling device.

[0006] Optionally, it further comprises a second coupling device for connecting or disconnecting the engine and the planetary gear set.

[0007] Optionally, the planetary gear set is at least partially accommodated in the first motor.

[0008] Optionally, the first coupling device is at least partially accommodated in the first motor.

[0009] Optionally, the planet carrier is connected to the engine, the sun gear is connected to the first motor, the ring gear is connected to the input shaft, the first coupling device is arranged on the input shaft, and the planet carrier is selectively connected to the input shaft through the first coupling device.

[0010] Optionally, the first motor is coaxially arranged with the engine.

[0011] Optionally, the transmission device further comprises an output shaft, at least one gear pair and gear shifting devices, the at least one gear pair being between the input shaft and the output shaft through the respective gear shifting device to transmit power.

[0012] Optionally, the at least one gear pair comprises a plurality of drive gear pairs, through which the engine can realize multi-gear transmission.

[0013] Optionally, the at least one gear pair further comprises a reverse gear pair, through which the engine can realize reverse transmission.

[0014] Optionally, the gear shifting device is arranged in one of the input shaft or the output shaft.

[0015] Optionally, the at least one gear pair comprises: a low-speed gear with a gear ratio of 2.5-3.3; and a high-speed gear with a gear ratio of 5-8.

[0016] Optionally, the fixed gear ratio of the planetary gear set is 1.8-3.

[0017] Optionally, the engine and the first motor are arranged longitudinally.

[0018] Optionally, further comprising a second motor outputting power to the transmission device.

[0019] Optionally, the second motor is coaxially arranged with the engine.

[0020] Optionally, the second motor is arranged in the input shaft, and the second motor is located on a side of the at least one gear pair away from the planetary gear set, or the second motor is located between the first coupling device and the transmission device.

[0021] Optionally, the second motor is arranged non-coaxially with the engine.

[0022] Optionally, further comprising a first transmission gear pair, through which the second motor is connected with the input shaft.

[0023] Optionally, the second motor is located on a side of the first transmission gear pair close to the transmission device.

[0024] Optionally, further comprising an output shaft and a second transmission gear pair, through which the second motor is connected with the output shaft.

[0025] Optionally, the second motor is located on a side of the second transmission gear pair close to the transmission device.

[0026] Optionally, it further includes: an electric drive assembly; and a power battery, the power battery being connected to the electric drive assembly and the first motor respectively, wherein the motor is used to drive one of the front axle and the rear axle, and the electric drive assembly is used to drive the other of the front axle and the rear axle.

[0027] Optionally, the electric drive assembly further includes a wheel-end decoupler, wherein decoupling of the wheel-end decoupler achieves disengagement from the wheel end.

[0028] Optionally, the electric drive assembly further includes a differential lock, wherein synchronous rotation of the two wheel ends is achieved when the wheel end decoupler is coupled and the differential lock is locked.

[0029] Through the above technical solution, the engine can drive the first motor to generate electricity via a planetary gear set. It can also selectively connect to the input shaft of the transmission via the planetary gear set and the first coupling device. This allows the engine to directly drive the wheel ends when engaged with the transmission's input shaft. During this process, any energy exceeding the wheel end's power requirement can be diverted to the first motor for efficient utilization of the engine's output energy. When the wheel end's power requirement changes, the engine can be decoupled from the input shaft, and the proportion of energy diverted to the first motor can be adjusted to meet the wheel end's power demand. This allows the engine to maintain its high-efficiency operating range for extended periods, comprehensively improving the vehicle's overall energy utilization efficiency.

[0030] A second aspect of this disclosure provides a hybrid powertrain, comprising: an engine; a first motor capable of generating electricity when driven by the engine; a transmission device including an input shaft, an output shaft, a plurality of drive gear pairs disposed between the input shaft and the output shaft, and a gear shifting device, wherein the plurality of drive gear pairs transmit power between the input shaft and the output shaft through their respective gear shifting devices to achieve multi-speed transmission; and a planetary gear set including a sun gear, a planet carrier having planet gears, and a ring gear, wherein one of the sun gear, the planet carrier, and the ring gear is connected to the first motor, one is connected to the input shaft, and the other is connected to the engine.

[0031] Optionally, the engine is configured to operate in a high-efficiency operating range, and the transmission is configured to switch the plurality of drive gear pairs according to the different torque requirements of the vehicle.

[0032] Optionally, the engine is configured to operate in a high-efficiency operating range. When the SOC value of the power battery is less than a preset threshold, the first motor is configured to adjust its own speed according to the current speed requirement of the vehicle and the current speed of the engine.

[0033] Optionally, the transmission device is a parallel-shaft multi-speed transmission.

[0034] A third aspect of this disclosure provides a hybrid powertrain, comprising: an engine; a first electric motor capable of generating electricity when driven by the engine; a transmission device including an input shaft; and a planetary gear set including a sun gear, a planet carrier with planet gears, and a ring gear, wherein one of the sun gear, the planet carrier, and the ring gear is connected to the first electric motor, one is connected to the input shaft, and the other is connected to the engine.

[0035] The engine and the first motor are arranged longitudinally.

[0036] A fourth aspect of this disclosure provides a hybrid powertrain, comprising: a longitudinally mounted engine; a longitudinally mounted first motor capable of generating electricity when driven by the engine; a transmission; and a planetary gear set including a sun gear, a planet carrier having planet gears, and a ring gear, wherein one of the sun gear, the planet carrier, and the ring gear is connected to the first motor, one is connected to the input shaft, and the other is connected to the engine.

[0037] The assembly consisting of the first motor, the transmission device, and the planetary gear set has a width dimension of 500-600mm in the vehicle.

[0038] Optionally, the planetary gear set is at least partially housed within the first motor, and the assembly consisting of the first motor, the transmission device, and the planetary gear set has a longitudinal dimension of 800-900 mm in the vehicle.

[0039] Optionally, it further includes a laterally arranged first differential, which is connected to the transmission, and there is a accommodating space between the engine, the planetary gear set, and the transmission.

[0040] The connection between the engine and the planetary gear set, and the first differential are located within the accommodating space, and the first differential and the connection at least partially overlap along the height direction of the vehicle.

[0041] Optionally, the assembly consisting of the first motor, the transmission device, and the planetary gear set has a dimension of 550-630 mm in the height direction of the vehicle.

[0042] A fifth aspect of this disclosure provides a hybrid powertrain, comprising: a longitudinally mounted engine; a longitudinally mounted first motor capable of generating electricity when driven by the engine; a transmission; and a planetary gear set, including a sun gear, a planet carrier having planet gears, and a ring gear, wherein one of the sun gear, the planet carrier, and the ring gear is connected to the first motor, one is connected to the input shaft, and the other is connected to the engine, wherein the assembly consisting of the first motor, the transmission, and the planetary gear set has a longitudinal dimension of 800-900 mm in the vehicle.

[0043] A sixth aspect of this disclosure provides a hybrid powertrain, comprising: a longitudinally mounted engine; a longitudinally mounted first motor capable of generating electricity when driven by the engine; a transmission; and a planetary gear set, including a sun gear, a planet carrier having planet gears, and a ring gear, wherein one of the sun gear, the planet carrier, and the ring gear is connected to the first motor, one is connected to the input shaft, and the other is connected to the engine, wherein the assembly consisting of the first motor, the transmission, and the planetary gear set has a dimension of 550-630 mm in the height direction of the vehicle.

[0044] A seventh aspect of this disclosure provides a hybrid powertrain, comprising: an engine longitudinally mounted in the longitudinal direction of a vehicle; a first motor longitudinally mounted in the longitudinal direction of the vehicle, capable of generating electricity when driven by the engine; a transmission; and a planetary gear set, including a sun gear, a planet carrier having planet gears, and a ring gear, wherein one of the sun gear, the planet carrier, and the ring gear is connected to the first motor, one is connected to the input shaft, and the other is connected to the main shaft, wherein the dimension of the assembly consisting of the first motor, the transmission, and the planetary gear set in the width direction of the vehicle is: the width of the vehicle body = 0.25-0.35:1.

[0045] An eighth aspect of this disclosure provides a hybrid powertrain, comprising: an engine longitudinally mounted in the longitudinal direction of a vehicle; a first motor longitudinally mounted in the longitudinal direction of the vehicle, capable of generating electricity when driven by the engine; a transmission; and a planetary gear set, including a sun gear, a planet carrier having planet gears, and a ring gear, wherein one of the sun gear, the planet carrier, and the ring gear is connected to the first motor, one is connected to the input shaft, and the other is connected to the main shaft, wherein the dimensions of the assembly consisting of the first motor, the transmission, and the planetary gear set in the longitudinal direction of the vehicle are: the length of the vehicle body = 0.15-0.2:1.

[0046] A ninth aspect of this disclosure provides a hybrid powertrain, comprising: an engine longitudinally mounted in the longitudinal direction of a vehicle; a first motor longitudinally mounted in the longitudinal direction of the vehicle, capable of generating electricity when driven by the engine; a transmission; and a planetary gear set, including a sun gear, a planet carrier having planet gears, and a ring gear, wherein one of the sun gear, the planet carrier, and the ring gear is connected to the first motor, one is connected to the input shaft, and the other is connected to the main shaft, wherein the dimension of the assembly consisting of the first motor, the transmission, and the planetary gear set in the height direction of the vehicle is: the height of the vehicle body = 0.25-0.35:1.

[0047] A tenth aspect of this disclosure provides a hybrid powertrain, comprising: an engine; a first motor capable of generating electricity when driven by the engine; and a planetary gear set including a sun gear, a planet carrier having planet gears, and a ring gear, wherein one of the sun gear, the planet carrier, and the ring gear is connected to the first motor, one is connected to the input shaft, and the other is connected to the engine and selectively connected to the input shaft via a first coupling device.

[0048] The first motor is configured to adjust the power generation speed according to the operating speed requirement of the wheel end, so that the engine is maintained within the target operating speed range.

[0049] Optionally, the engine is configured to operate in a high-efficiency speed range. When the SOC value of the power battery is less than a preset threshold, the first motor is configured to adjust its own speed according to the current speed requirements of the vehicle and the engine speed.

[0050] The eleventh aspect of this disclosure provides a vehicle including any of the hybrid powertrains described above.

[0051] A twelfth aspect of this disclosure provides a vehicle control method applied to a vehicle having a hybrid powertrain, the hybrid powertrain including an engine, a first electric motor, and a planetary gear set; the control method includes:

[0052] When the engine distributes power through the planetary gear set, the speed of the first motor is regulated according to the wheel end speed requirement so that the engine is maintained within the target operating speed range.

[0053] Optionally, the control method further includes obtaining the SOC value of the power battery, and when the SOC value of the power battery is less than a preset threshold, controlling the first motor to adjust the speed according to the current speed requirement of the vehicle and the engine speed.

[0054] Optionally, the hybrid powertrain has: a pure electric mode in which the first motor drives the wheel end; a direct drive mode in which the engine drives the wheel end; a hybrid mode in which the engine drives the wheel end and the engine drives the first motor to generate electricity; and a parking power generation mode in which the engine drives the first motor to generate electricity.

[0055] A thirteenth aspect of this disclosure provides a vehicle control method applied to a vehicle having a hybrid powertrain, the hybrid powertrain including an engine, a first electric motor, a planetary gear set, and a multi-speed transmission, the control method comprising:

[0056] When the engine distributes power through the planetary gear set, the speed of the first motor is adjusted according to the wheel end speed requirement to keep the engine in the target operating speed range, and the gear of the transmission is adjusted according to the wheel end torque requirement to keep the engine in the target operating torque range.

[0057] Through the above technical solution, the first motor can adjust the generator speed according to the operating speed requirement of the wheel end, so as to keep the engine in the target operating speed range; the multi-speed transmission device can adjust the torque according to the operating torque requirement of the wheel end, so as to keep the engine in the target operating torque range.

[0058] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0059] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0060] Figure 1 This is a schematic diagram of a hybrid powertrain according to an exemplary embodiment;

[0061] Figure 2 This is a schematic diagram of a hybrid powertrain according to an exemplary embodiment;

[0062] Figure 3 This is a schematic diagram of a hybrid powertrain according to an exemplary embodiment;

[0063] Figure 4 This is a schematic diagram of a hybrid powertrain according to an exemplary embodiment;

[0064] Figure 5 This is a schematic diagram of a hybrid powertrain according to an exemplary embodiment;

[0065] Figure 6This is a schematic diagram of a hybrid powertrain according to an exemplary embodiment;

[0066] Figure 7 This is a schematic diagram of a hybrid powertrain according to an exemplary embodiment;

[0067] Figure 8 This is a schematic diagram of a hybrid powertrain according to an exemplary embodiment;

[0068] Figure 9 This is a schematic diagram of a hybrid powertrain according to an exemplary embodiment;

[0069] Figure 10 This is a schematic diagram of a hybrid powertrain according to an exemplary embodiment;

[0070] Figure 11 This is a schematic diagram of a hybrid powertrain according to an exemplary embodiment;

[0071] Figure 12 This is a schematic diagram of a hybrid powertrain according to an exemplary embodiment;

[0072] Figure 13 This is a block diagram illustrating a vehicle control method according to an exemplary embodiment;

[0073] Figure 14 This is a block diagram illustrating a vehicle control method according to an exemplary embodiment.

[0074] Explanation of reference numerals in the attached figures

[0075] 100-Engine, 200-First motor, 300-Planetary gear set, 310-Sun gear, 320-Planet carrier, 321-Planet gear, 330-Ring gear, 340-First coupling device, 350-Second coupling device, 400-Transmission device, 410-Input shaft, 420-Output shaft, 450-First differential, 430-Gear pair, 431-First drive gear pair, 432-Second drive gear pair, 433-Third drive gear pair, 434-Reverse gear pair, 440-Gear shifter, 441-First gear shifter, 442-Second gear shifter, 443-Third gear shifter, 444-Fourth gear shifter, 500-Second motor, 510-First transmission gear pair, 520-Second transmission gear pair, 600-Electric drive assembly, 700-Front axle, 800-Rear axle. Detailed Implementation

[0076] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0077] In this disclosure, unless otherwise stated, directional terms such as "front" and "rear" are defined according to the normal driving direction of the vehicle. Furthermore, the modifiers "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not imply sequentiality or importance. The term "connection" in the embodiments of this disclosure, unless explicitly stated or contradictory, can refer to a direct connection or an indirect connection (i.e., a connection through another intermediate component).

[0078] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0079] First, it should be noted that the technical solutions of the embodiments of this disclosure are described in several aspects below. In the absence of contradiction, the embodiments of different aspects can be combined with each other.

[0080] A first aspect of this disclosure provides a hybrid powertrain, with reference to... Figures 1-3 The system includes an engine 100, a first motor 200, a planetary gear set 300, and a transmission device 400. The first motor 200 generates electricity driven by the engine 100. The transmission device 400 may include an input shaft 410. The planetary gear set 300 may include a sun gear 310, a planet carrier 320 with planet gears 321, and a ring gear 330. One of the sun gear 310, planet carrier 320, and ring gear 330 can be connected to the first motor 200, one to the input shaft 410, and the other to the engine 100. Thus, the engine 100, the first motor 200, and the input shaft 410 (which can represent the wheel ends) are each connected to a transmission component of the planetary gear set structure. This means that the power transmitted from the engine 100 to the input shaft 410 is also constrained by the first motor 200, achieving decoupling between the engine 100 and the input shaft 410.

[0081] In this design, one of the sun gear 310, planet carrier 320, and ring gear 330 that connects to the engine 100 is also selectively connected to the input shaft 410 via a first coupling device 340.

[0082] In the above embodiment, the engine 100 can be selectively connected to the input shaft 410 via the planetary gear set 300 and the first coupling device 340, so that when the engine 100 is engaged with the input shaft 410, it can directly drive the wheel end to rotate. At this time, part of the power output by the engine 100 can be transmitted to the first motor 200 through the planetary gear set 300 for shunt. The first motor 200 can generate electricity at a certain speed to reduce power loss during transmission. When the speed requirement of the wheel end changes, the engine 100 and the input shaft 410 can be decoupled, and the speed of the first motor 200 can be adaptively adjusted to change the output power distribution ratio of the engine 100. Thus, while meeting the speed requirement of the wheel end, the engine 100 can still maintain a high-efficiency operating range for a long time, thereby comprehensively improving the overall energy utilization efficiency of the vehicle.

[0083] It should be noted that when the engine 100 outputs power through the planetary gear set 300, the transmission structure of the planetary gear set 300 inevitably results in power loss. This power loss can be effectively utilized by the power diversion of the first motor 200. Simultaneously, during actual vehicle operation, various factors such as road conditions or weather may cause changes in the wheel speed requirements. In such cases, the portion of the engine 100's output power diverted to the first motor 200 can be adjusted accordingly based on the wheel speed requirements. This allows the engine 100's output power to remain within its high-efficiency operating range while meeting the wheel speed demands, eliminating the need for active power adjustments based on wheel speed requirements. Consequently, the engine 100 achieves optimal performance in terms of fuel economy, emissions, and power.

[0084] According to some embodiments, refer to Figures 1-3 The hybrid powertrain may further include a second coupling device 350, which can be used to connect or disconnect the engine 100 from the planetary gear set 300. The second coupling device 350 may be disposed between the engine 100 and the planetary gear set 300, and may be positioned close to either the engine 100 or the planetary gear set 300 depending on the actual spatial arrangement. The second coupling device 350 may be, for example, any type of clutch, disposed on the output shaft of the engine 100.

[0085] In some embodiments, refer to Figures 1-3 The planetary gear 300 can be at least partially housed within the first motor 200, and part of the structure of the planetary gear 300 can be hidden within the first motor 200 to reduce the overall volume of the planetary gear 300. This is beneficial for the rational arrangement of the hybrid powertrain in the vehicle's interior space, thereby improving the driving and riding experience of the occupants.

[0086] For example, refer to Figures 1-3The first coupling device 340 can be at least partially housed within the first motor 200, and part of the structure of the first coupling device 340 can be hidden within the first motor 200 to reduce the volume occupied by the first coupling device 340 in the vehicle interior space, improve the utilization rate of the vehicle interior space, and provide better comfort for drivers and passengers.

[0087] The first motor 200 may have a housing to accommodate the planetary gear set 300, the first coupling device 340, and other related components, thereby making the overall structure more compact.

[0088] According to some embodiments, refer to Figures 1-3 The planetary carrier 320 can be connected to the engine 100, the sun gear 310 can be connected to the first motor 200, the ring gear 330 can be connected to the input shaft 410, and the first coupling device 340 can be set on the input shaft 410. The planetary carrier 320 can be selectively connected to the input shaft 410 through the first coupling device 340.

[0089] In the above embodiment, the engine 100 is connected to the planetary carrier 320 and can output power to the planetary gear set 300 through the planetary carrier 320. The first motor 200 is connected to the sun gear 310 and can be driven to rotate by the planetary carrier 320. The first motor 200 can generate electricity at a certain speed using part of the power transmitted by the engine 100. The input shaft 410 is connected to the ring gear 330 and can rotate under the drive of the planetary carrier 320, transmitting part of the power of the engine 100 to the wheel ends via the input shaft 410 to drive the vehicle. Simultaneously, the first coupling device 340 provided on the input shaft 410 can selectively connect the planetary carrier 320 and the input shaft 410, allowing the engine 100 to directly drive the wheel ends when the first coupling device 340 engages the planetary carrier 320 with the input shaft 410, and to decouple from the wheel ends when the first coupling device 340 disconnects the planetary carrier 320 from the input shaft 410. This effectively improves the linear correlation between the engine 100 and the wheel ends, allowing the engine 100 to maintain its high-efficiency operating range for extended periods.

[0090] According to other embodiments, the correspondence between the engine 100, the first motor 200, and the input shaft 410 and the transmission components of the planetary gear set can be adaptively adjusted. For example, in Figure 12 In the illustrated embodiment, the planetary carrier 320 can be connected to the engine 100, the ring gear 330 can be connected to the first motor 200, the sun gear 310 can be connected to the input shaft 410, and the first coupling device 340 can be disposed on the input shaft 410. This embodiment also has the effects of the above embodiments, which will not be repeated here.

[0091] For example, refer to Figures 1-3The first motor 200 can be coaxially mounted with the engine 100, achieving a coaxial integrated design. This effectively reduces energy conversion losses between the two, improves energy utilization efficiency, optimizes their cooperation, and makes the vehicle's power output more efficient, achieving faster acceleration and smoother speed changes, providing the driver with a smoother driving experience. Simultaneously, the coaxial mounting also reduces the transmission connection structure between the engine 100 and the first motor 200, rationally improving the utilization of interior space.

[0092] In some embodiments, refer to Figures 1-3 The transmission device 400 may further include an output shaft 420, at least one gear pair 430, and a gear shifting device 440. The at least one gear pair 430 can transmit power between the input shaft 410 and the output shaft 420 through its corresponding gear shifting device 440. In this embodiment, the transmission device 400 may have gear pairs 430 and gear shifting devices 440 for adjusting torque and speed. Any gear pair 430 and its corresponding gear shifting device 440 can transmit different power between the input shaft 410 and the output shaft 420 to adjust the torque demand at the wheel ends under different driving conditions such as vehicle starting, acceleration, driving, and overcoming various road obstacles.

[0093] Meanwhile, the gear shifting device 440 can be either a synchronizer or a clutch, and it can be mounted on the input shaft 410 or the output shaft 420. When the gear shifting device 440 is a clutch, it can be a wet clutch, an electromagnetic clutch, or any other suitable type of clutch. According to some embodiments, to improve structural compactness, adjacent gear shifting devices 440 can also be integrated. For example, with... Figure 1 For example, the first gear shifting device 441 and the second gear shifting device 442 are integrated into one unit and installed on the output shaft 420 in the form of a dual synchronizer or a dual clutch.

[0094] According to some embodiments, refer to Figures 1-3 The gear pair 430 can be located on the side of the first coupling device 340 away from the planetary gear set 300, so that the entire transmission device 400 with shifting function can be coupled or decoupled from the engine 100 through the first coupling device 340. The gear pair 430 is closer to the wheel end than the planetary gear set 300, so that the response is timely and the operation is smooth when shifting gears according to the torque demand of the wheel end, while making reasonable use of the interior space.

[0095] In some embodiments, refer to Figures 1-11At least one gear pair 430 may include multiple drive gear pairs, and the engine 100 can achieve multi-gear transmission through multiple drive gear pairs, wherein the multiple drive gear pairs may be arranged sequentially between the input shaft 410 and the output shaft 420. Figure 1 For example, the multiple drive gear pairs may include a first drive gear pair 431, a second drive gear pair 432, and a third drive gear pair 433. This arrangement allows the transmission device 400 to have multiple transmission ratios to meet the power output requirements of different operating conditions. Accordingly, the first drive gear pair 431 transmits power through a first gear shifting device 441, the second drive gear pair 432 transmits power through a second gear shifting device 442, and the third drive gear pair 433 transmits power through a third gear shifting device 443.

[0096] For example, refer to Figure 1 At least one gear pair 430 may also include a reverse gear pair 434, through which the engine 100 can achieve reverse gear transmission. The reverse gear pair 434 can be positioned on the side of the multiple drive gear pairs away from the planetary gear set 300, which facilitates a rational arrangement of interior space and allows for easy installation or disassembly according to actual reverse gear transmission requirements. Power transmission can be achieved through a fourth gear shifting device 444.

[0097] According to some embodiments, refer to Figures 1-3 The gear shifting device 440 can be set on either the input shaft 410 or the output shaft 420. The shaft setting of the gear shifting device 440 can be adaptively changed according to the actual structural layout of the input shaft 410, the output shaft 420 and the related components between them, thereby improving the utilization of vehicle interior space and having more flexible assembly applicability.

[0098] For example, at least one gear pair 430 may include a low gear and a high gear, such as... Figure 3 For example, this embodiment sets up a first drive gear pair 431 and a second drive gear pair 432, one of which is a low-speed gear and the other is a high-speed gear. The gear ratio of the low-speed gear can be 2.5-3.3, and the gear ratio of the high-speed gear can be 5-8. This allows different gear pairs 430 to operate within their respective corresponding speed output ranges, resulting in smoother gear shifting for the vehicle as a whole, improving the driving experience for passengers, and ensuring good fuel economy for the engine 100 at different speed outputs in different gears.

[0099] In some embodiments, the fixed speed ratio of the planetary gear set can be 1.8-3, so that the output power distribution of the engine 100 is close to the optimal transmission efficiency ratio, further optimizing the power distribution of the engine 100 and reducing energy loss and fuel consumption. It should be noted that the fixed speed ratio of the planetary gear set refers to the ratio of the number of teeth of the ring gear 330 to the number of teeth of the sun gear 310.

[0100] According to some embodiments, refer to Figures 8-9 The engine 100 and the first motor 200 can be arranged longitudinally, meaning that the output shaft of the engine 100 and the axis of the first motor 200 both extend towards the front-rear direction of the vehicle, thereby reducing the space occupied by the overall structure of the hybrid powertrain in the lateral direction of the vehicle. Since the longitudinal length of a vehicle is usually greater than its lateral length, the structural layout of the vehicle's interior space can be optimized by arranging the engine 100 and the first motor 200 along the longitudinal direction (i.e., the length direction) of the vehicle, providing more space for the wheel arrangement along the lateral direction (i.e., the width direction).

[0101] In some embodiments, refer to Figures 1-3 The hybrid powertrain may also include a first differential 450 arranged in the lateral direction of the vehicle for converting the power output from the engine 100 and the first motor 200 from longitudinal drive to lateral drive to drive the wheel ends arranged in the lateral direction of the vehicle.

[0102] For example, refer to Figures 4-7 The hybrid powertrain may also include a second motor 500 for outputting power to the transmission 400.

[0103] In some embodiments, refer to Figures 4-5 The second motor 500 can be coaxially mounted with the engine 100, achieving a coaxial integrated design. This improves the efficiency of energy utilization between the two motors, optimizes their cooperation, and makes the vehicle's power output efficient and smooth, enhancing the driving experience. Simultaneously, the coaxial mounting reduces the transmission connection structure between the engine 100 and the second motor 500, thus improving the utilization of interior space.

[0104] According to some embodiments, refer to Figures 4-5 The second motor 500 can be located on the input shaft 410. The second motor 500 can be located on the side of at least one gear pair 430 away from the planetary gear set 300, or the second motor 500 can be located between the first coupling device 340 and the transmission device 400. The engagement position of the second motor 500 can be adjusted according to the specific requirements of the vehicle interior volume to reasonably allocate the spatial structure layout of the hybrid powertrain in the vehicle.

[0105] For example, refer to Figures 6-7The second motor 500 can be set off-axis from the engine 100, so that the second motor 500 can be reasonably set in a relatively spacious space in the vehicle when the overall structure of the transmission device 400 is relatively compact and the space structure layout of the hybrid powertrain in the vehicle is relatively tight. The second motor 500 can be set off-axis from the engine 100 through a related structure that is connected to the input shaft 410.

[0106] In some embodiments, refer to Figures 6-7 The hybrid powertrain may also include a first transmission gear pair 510, through which the second motor 500 can be connected to the input shaft 410, and the first transmission gear pair 510 can transmit the output power of the second motor 500 to the input shaft 410.

[0107] According to some embodiments, refer to Figures 6-7 The second motor 500 can be located on the side of the first transmission gear pair 510 near the transmission device 400, and the first transmission gear pair 510 can also be set between the first coupling device 340 and the transmission device 400. The engagement position of the first transmission gear pair 510 can be adjusted according to the specific requirements of the vehicle interior volume in order to reasonably allocate the spatial structure layout of the hybrid powertrain in the vehicle.

[0108] For example, refer to Figures 10-11 The hybrid powertrain may also include a second transmission gear pair 520, through which the second motor 500 can be connected to the output shaft 420, wherein the second transmission gear pair 520 can transmit the output power of the second motor 500 to the output shaft 420.

[0109] In some embodiments, refer to Figures 10-11 The second motor 500 can be located on the side of the second transmission gear pair 520 closer to the transmission 400, so that the spatial layout of the second motor 500 and the transmission 400 is more compact, reducing the volume occupied by the hybrid powertrain in the vehicle interior. At the same time, the second transmission gear pair 520 can also be located on the side of the output shaft 420 away from the transmission 400, so that the engagement position of the second transmission gear pair 520 can be adjusted according to the specific requirements of the vehicle interior volume, and the spatial structure layout of the hybrid powertrain in the vehicle interior can be rationally allocated.

[0110] For example, the second motor 500 can be offset from the transmission 400 to make reasonable use of the space between the two, save vehicle interior space, and make the spatial layout of the second motor 500 relative to the transmission 400 more compact. The second motor 500 can be at least partially hidden in the transmission 400.

[0111] According to some embodiments, refer to Figures 8-9The hybrid powertrain may further include an electric drive assembly 600 and a power battery, wherein the power battery may be connected to the electric drive assembly 600 and the first motor 200 respectively. The engine 100 may be used to drive one of the front axle 700 and the rear axle 800, and the electric drive assembly 600 may be used to drive the other of the front axle 700 and the rear axle 800.

[0112] In the above embodiments, the electric drive assembly 600 and the power battery constitute the power source for the electric drive of the vehicle. This electric drive power source, along with the engine 100, can drive the front axle 700 and rear axle 800 of the vehicle respectively, thus forming a four-wheel drive mode. Simultaneously, the first motor 200 can also be connected to the power battery, allowing the first motor 200 to convert a portion of the power output from the engine 100 into electrical energy and store it in the power battery. Alternatively, in necessary driving modes, the power battery can output electrical energy in reverse to the first motor 200, enabling the first motor 200 to function as a drive motor. This power output from the first motor 200 can be used as the driving force for vehicle movement, driving the wheels via the planetary gear set 300, or to start the engine 100 or assist in its operation. This allows the first motor 200 to be flexibly applied to energy conversion during vehicle operation.

[0113] In some embodiments, the electric drive assembly 600 may further include a wheel-end decoupler, which decouples the electric drive assembly 600 from the wheel end when the wheel-end decoupler is decoupled. When the engine 100 and the first motor 200 are used as front drive and the electric drive assembly 600 is used as rear drive, if the power of the front drive is sufficient, the electric drive assembly 600 can be decoupled from the wheel end, thereby avoiding dragging losses, that is, avoiding the reaction of the wheel end's movement to the electric drive assembly 600.

[0114] For example, the electric drive assembly 600 may also include a differential lock, which enables synchronous rotation of both wheel ends when the wheel-end decoupler is coupled and the differential lock is locked, thereby assisting the vehicle in achieving the function of getting out of trouble.

[0115] The aforementioned wheel-end decoupler and differential lock, in conjunction with the differential gear set, can constitute the second differential of the electric drive assembly 600. The wheel-end decoupler and differential lock can be arranged on both sides or the same side of the differential gear set. The wheel-end decoupler and differential lock can be used to couple or decouple the electric drive assembly 600 from the wheel ends, and can also be used to achieve differential or synchronous rotation of the two wheel ends. Specifically, when the wheel-end decoupler is coupled and the differential lock is not locked, differential transmission at the wheel ends can be achieved.

[0116] In some embodiments, the differential lock and wheel-end decoupler can be integrated and disposed on the same side of the differential gear set to achieve coupling or decoupling with the wheel end and coupling or decoupling with the differential housing. Taking the electric drive assembly 600 driving the rear axle 800 as an example, the first end of the wheel-end decoupler can be connected to the first half-shaft of the rear axle 800, and the second end of the wheel-end decoupler can be selectively connected to the differential gear set. The differential lock can be used to connect or disconnect the differential housing from the second half-shaft of the same rear axle 800. By integrating the wheel-end decoupler and differential lock on the same side of the differential gear set, the space on one side of the first differential 450 can be fully utilized, resulting in a simple structure and a small footprint.

[0117] A second aspect of this disclosure provides a hybrid powertrain, with reference to... Figure 1 The system includes an engine 100, a first motor 200, a planetary gear set 300, and a transmission device 400. The first motor 200 generates electricity when driven by the engine 100. The transmission device 400 includes an input shaft 410, an output shaft 420, multiple drive gear pairs disposed between the input shaft 410 and the output shaft 420, and a gear shifting device 440. The multiple drive gear pairs can transmit power between the input shaft 410 and the output shaft 420 through their respective gear shifting devices 440 to achieve multi-speed transmission. The planetary gear set 300 includes a sun gear 310, a planet carrier 320 with planet gears 321, and a ring gear 330. One of the sun gear 310, the planet carrier 320, and the ring gear 330 can be connected to the first motor 200, one can be connected to the input shaft 410, and the other can be connected to the engine 100.

[0118] In the above embodiment, the engine 100 can be connected to the input shaft 410 via the planetary gear set 300 to drive the wheel end to rotate. At this time, part of the power output by the engine 100 can be transmitted to the first motor 200 via the planetary gear set 300 for shunt. The first motor 200 can generate electricity at a certain speed to reduce power loss during transmission. When the speed requirement of the wheel end changes, the speed of the first motor 200 can be adaptively adjusted to change the output power distribution ratio of the engine 100, so that the engine 100 can maintain operation within the high-efficiency operating range.

[0119] Meanwhile, the multiple drive gear pairs and corresponding gear shifting devices 440 in the transmission device 400 can realize multi-gear power transmission between the input shaft 410 and the output shaft 420. When the torque demand at the wheel end changes, the torque demand at the wheel end can be met by switching different gears of the transmission device 400, so that the engine 100 can maintain operation in the high-efficiency torque range. Thus, while meeting the speed and torque demands at the wheel end, the engine 100 can still maintain in the high-efficiency operating range for a long time, thereby comprehensively improving the overall energy utilization efficiency of the vehicle.

[0120] According to some embodiments, the engine 100 can be configured to operate in a high-efficiency operating range, and the transmission 400 can be configured to switch between multiple drive gear pairs according to the different torque requirements of the vehicle. In this embodiment, the torque requirement of the vehicle is the torque requirement at the wheel ends. The torque output by the engine 100 or other power sources in the same power circuit is transmitted to the wheel ends through the transmission structure, which is the actual torque at the wheel ends. To ensure that the torque output by the engine 100 remains in the high-efficiency operating range while meeting the torque requirements at the wheel ends, the output torque of the engine 100 can be adjusted by switching the gears of multiple drive gear pairs in the transmission 400, so that the adjusted torque meets the torque requirements at the wheel ends.

[0121] In some embodiments, the engine 100 can be configured to operate in a high-efficiency operating range. When the SOC value of the power battery is less than a preset threshold, the first motor 200 can be configured to adjust its own speed according to the current speed requirement of the vehicle and the current speed of the engine 100. In this embodiment, the vehicle's speed requirement is the wheel-end speed requirement. The preset threshold for the power battery SOC value can be set according to the optimal efficiency of the actual energy output. When the SOC value of the power battery is lower than the preset threshold, the first motor 200 can adjust its own speed according to the wheel-end speed requirement and the current speed at the output of the engine 100, so that the wheel-end speed is satisfied without affecting the actual speed output by the engine 100 when operating in the high-efficiency operating range.

[0122] For example, the transmission 400 can be a parallel-shaft multi-speed transmission, which provides smooth shifting and high transmission efficiency, effectively improving the driver's driving experience. At the same time, this parallel-shaft multi-speed transmission has low manufacturing costs, stable shifting, and a long service life.

[0123] A third aspect of this disclosure provides a hybrid powertrain, with reference to... Figures 8-9 The system includes an engine 100, a first motor 200, a planetary gear set 300, and a transmission device 400. The first motor 200 can generate electricity driven by the engine 100. The transmission device 400 may include an input shaft 410. The planetary gear set 300 may include a sun gear 310, a planet carrier 320 with planet gears 321, and a ring gear 330. One of the sun gear 310, the planet carrier 320, and the ring gear 330 may be connected to the first motor 200, one may be connected to the input shaft 410, and the other may be connected to the engine 100. The engine 100 and the first motor 200 are arranged longitudinally.

[0124] In the above embodiment, the engine 100 can be connected to the input shaft 410 via the planetary gear set 300 to drive the wheel end to rotate. At this time, part of the power output by the engine 100 can be transmitted to the first motor 200 through the planetary gear set 300 for shunt. The first motor 200 can generate electricity at a certain speed to reduce power loss during transmission. When the speed requirement of the wheel end changes, the speed of the first motor 200 can be adaptively adjusted to change the output power distribution ratio of the engine 100. Thus, while meeting the speed requirement of the wheel end, the engine 100 can still maintain a high-efficiency operating range for a long time, thereby comprehensively improving the overall energy utilization efficiency of the vehicle.

[0125] Meanwhile, arranging the engine 100 and the first motor 200 longitudinally can reduce the space occupied by the overall structure of the hybrid powertrain in the lateral direction of the vehicle. Since the longitudinal length of a vehicle is usually greater than its lateral length, arranging the engine 100 and the first motor 200 along the longitudinal direction of the vehicle can optimize the structural layout of the vehicle's interior space, providing more space for the wheel layout along the lateral direction of the vehicle.

[0126] A fourth aspect of this disclosure provides a hybrid powertrain, with reference to Figures 8-9 The system includes a longitudinally mounted engine 100, a longitudinally mounted first motor 200, a planetary gear set 300, and a transmission 400. The longitudinally mounted first motor 200 generates electricity driven by the longitudinally mounted engine 100. The planetary gear set 300 may include a sun gear 310, a planet carrier 320 with planet gears 321, and a ring gear 330. One of the sun gear 310, planet carrier 320, and ring gear 330 can be connected to the first motor 200, another to the input shaft 410, and the third to the engine 100. The assembly consisting of the first motor 200, the transmission 400, and the planetary gear set 300 can have a width of 500-600 mm in the vehicle's width direction to ensure a compact layout and reduce space occupation.

[0127] For example, refer to Figures 8-9 The planetary gear set 300 can be at least partially housed within the first motor 200. The assembly consisting of the first motor 200, the transmission device 400, and the planetary gear set 300 can have a longitudinal dimension of 800-900 mm in the vehicle. Since the longitudinal length of the vehicle in the longitudinal direction is usually greater than the lateral length of the vehicle in the width direction, the spatial layout of the hybrid power assembly along the longitudinal direction of the vehicle is more reasonable. This length setting can optimize the internal space structure of the vehicle.

[0128] In some embodiments, refer to Figures 8-9The hybrid powertrain may further include a laterally arranged first differential 450, which can be connected to the transmission 400. A space exists between the engine 100, the planetary gear set 300, and the transmission 400. The connection point between the engine 100 and the planetary gear set 300, and the first differential 450 are located within this space. The first differential 450 and the connection point may at least partially overlap along the height direction of the vehicle. In this embodiment, the laterally arranged first differential 450 can transmit longitudinally transmitted power laterally to the wheel ends on both sides of the vehicle. The space between the engine 100, the planetary gear set 300, and the transmission 400 forms a space capable of accommodating a certain volume. The connection point between the engine 100 and the planetary gear set 300, and the first differential 450, can be located within this space to make the spatial arrangement of the hybrid powertrain more compact and reduce its volume percentage within the vehicle's interior space. Meanwhile, the first differential 450 and the connecting part can at least partially overlap along the height direction of the vehicle, which can reduce the volume height in the height direction of the vehicle and form a composite space structure, providing more activity space for the driver and passengers and improving the driving experience.

[0129] For example, the assembly consisting of the first motor 200, the transmission device 400, and the planetary gear set 300 has a height dimension of 550-630mm in the vehicle to make full use of the space layout in the height direction, adapt to the space requirements of various vehicle models in the height direction, and improve the comfort of the driver and passengers.

[0130] In some embodiments, the dimensions of the assembly consisting of the first motor 200, the transmission 400, and the planetary gear set 300 in the width direction of the vehicle can be 0.25-0.35:1 compared to the width of the vehicle body. Here, the width direction of the vehicle refers to the lateral direction of the vehicle. By setting the lateral dimension of the hybrid powertrain in the vehicle body to a ratio of 0.25-0.35:1, the lateral space volume inside the vehicle can be fully utilized, thereby achieving a reasonable spatial layout of the hybrid powertrain in the width direction of the vehicle.

[0131] According to some embodiments, the dimensions of the assembly consisting of the first motor 200, the transmission device 400, and the planetary gear set 300 in the longitudinal direction of the vehicle are approximately 0.15-0.2:1 compared to the length of the vehicle body. Here, the longitudinal direction of the vehicle is the same as the longitudinal direction of the vehicle. By setting the longitudinal dimension of the hybrid powertrain to a ratio of 0.15-0.2:1 to the length of the vehicle body, the longitudinal space volume inside the vehicle can be fully utilized, thereby achieving a reasonable spatial layout of the hybrid powertrain in the longitudinal direction of the vehicle.

[0132] For example, the dimensions of the assembly consisting of the first motor 200, the transmission 400, and the planetary gear set 300 in the height direction of the vehicle are: the height of the vehicle body = 0.25-0.35:1. By setting the dimensions of this hybrid powertrain in the height direction of the vehicle to a ratio of 0.25-0.35:1 to the height of the vehicle body, the space volume in the height direction of the vehicle interior can be fully utilized, thereby achieving a reasonable spatial layout of the hybrid powertrain in the height direction of the vehicle.

[0133] A fifth aspect of this disclosure provides a hybrid powertrain, with reference to Figures 8-9 The system includes a longitudinally mounted engine 100, a longitudinally mounted first motor 200, a planetary gear set 300, and a transmission 400. The longitudinally mounted first motor 200 generates electricity driven by the longitudinally mounted engine 100. The planetary gear set 300 may include a sun gear 310, a planet carrier 320 with planet gears 321, and a ring gear 330. One of the sun gear 310, planet carrier 320, and ring gear 330 can be connected to the first motor 200, another to the input shaft 410, and the third to the engine 100. The assembly consisting of the first motor 200, the transmission 400, and the planetary gear set 300 has a longitudinal dimension of 800-900 mm in the vehicle's longitudinal direction. This arrangement of the hybrid powertrain along the vehicle's longitudinal direction provides a reasonable spatial layout, and this length setting optimizes the vehicle's internal space structure.

[0134] Other arrangements in this embodiment can be the same as those in the fourth aspect described above, and will not be repeated here.

[0135] A sixth aspect of this disclosure provides a hybrid powertrain, with reference to Figures 8-9 The system includes a longitudinally mounted engine 100, a longitudinally mounted first motor 200, a planetary gear set 300, and a transmission 400. The longitudinally mounted first motor 200 generates electricity driven by the longitudinally mounted engine 100. The planetary gear set 300 may include a sun gear 310, a planet carrier 320 with planet gears 321, and a ring gear 330. One of the sun gear 310, planet carrier 320, and ring gear 330 can be connected to the first motor 200, one to the input shaft 410, and the other to the engine 100. The assembly consisting of the first motor 200, the transmission 400, and the planetary gear set 300 has a height dimension of 550-630mm in the vehicle's height direction to fully utilize the space layout in the height direction, adapt to the space requirements of various vehicle models in the height direction, and improve the comfort of passengers.

[0136] Other arrangements in this embodiment can be the same as those in the fourth aspect described above, and will not be repeated here.

[0137] A seventh aspect embodiment of this disclosure provides a hybrid powertrain, with reference to Figures 8-9 The system includes: an engine longitudinally mounted along the front-rear direction of the vehicle; a first motor longitudinally mounted along the front-rear direction of the vehicle, capable of generating electricity when driven by the engine; a transmission; and a planetary gear set, including a sun gear, a planet carrier with planet gears, and a ring gear, wherein one of the sun gear, the planet carrier, and the ring gear is connected to the first motor, one is connected to the input shaft, and the other is connected to the main shaft. The assembly consisting of the first motor, the transmission, and the planetary gear set has a width ratio of 0.25-0.35:1 in the vehicle's width direction, which fully utilizes the lateral space within the vehicle, thereby achieving a reasonable spatial layout of the hybrid powertrain in the vehicle's width direction.

[0138] Other arrangements in this embodiment can be the same as those in the fourth aspect described above, and will not be repeated here.

[0139] An eighth aspect embodiment of this disclosure provides a hybrid powertrain, with reference to Figures 8-9 The system includes: an engine longitudinally mounted along the front-rear direction of the vehicle; a first motor longitudinally mounted along the front-rear direction of the vehicle, capable of generating electricity when driven by the engine; a transmission; and a planetary gear set, including a sun gear, a planet carrier with planet gears, and a ring gear, wherein one of the sun gear, the planet carrier, and the ring gear is connected to the first motor, one is connected to the input shaft, and the other is connected to the main shaft. The assembly consisting of the first motor, the transmission, and the planetary gear set has a front-rear dimension of 0.15-0.2:1 compared to the length of the vehicle body, allowing for full utilization of the longitudinal space within the vehicle and thus achieving a reasonable spatial layout of the hybrid powertrain in the front-rear direction.

[0140] Other arrangements in this embodiment can be the same as those in the fourth aspect described above, and will not be repeated here.

[0141] A ninth aspect embodiment of this disclosure provides a hybrid powertrain, with reference to Figure 13The system includes: an engine longitudinally mounted along the front-rear direction of the vehicle; a first motor longitudinally mounted along the front-rear direction of the vehicle, capable of generating electricity when driven by the engine; a transmission; and a planetary gear set, including a sun gear, a planet carrier with planet gears, and a ring gear, wherein one of the sun gear, the planet carrier, and the ring gear is connected to the first motor, one is connected to the input shaft, and the other is connected to the main shaft. The assembly consisting of the first motor, the transmission, and the planetary gear set has a height-to-body ratio of 0.25-0.35:1, which fully utilizes the interior space in the height direction of the vehicle, thereby achieving a reasonable spatial layout of the hybrid powertrain in the height direction of the vehicle.

[0142] Other arrangements in this embodiment can be the same as those in the fourth aspect described above, and will not be repeated here.

[0143] An embodiment of the tenth aspect of this disclosure provides a hybrid powertrain, including an engine 100, a first motor 200, and a planetary gear set 300. The first motor 200 generates electricity driven by the engine 100. The planetary gear set 300 may include a sun gear 310, a planet carrier 320 having planet gears 321, and a ring gear 330. One of the sun gear 310, planet carrier 320, and ring gear 330 may be connected to the first motor 200, another to an input shaft 410, and the third to the engine 100. The one of the sun gear 310, planet carrier 320, and ring gear 330 connected to the engine 100 is also selectively connected to the input shaft 410 via a first coupling device 340. The first motor 200 is configured to adjust its power generation speed according to the operating speed requirements of its gear ends, so that the engine 100 can be maintained within a target operating speed range, which is the high-efficiency operating range of the engine 100.

[0144] In the above embodiment, the engine 100 can be selectively connected to the input shaft 410 via a transmission component in the planetary gear set 300 and a first coupling device 340. This allows the engine 100 to directly drive the wheel ends to rotate when engaged with the input shaft 410. At this time, a portion of the power output by the engine 100 can be transferred to the first motor 200 via the planetary gear set 300 for shunt operation. The first motor 200 can generate electricity at a certain speed to reduce power loss during transmission. When the wheel end speed requirement changes, the speed of the first motor 200 can be adaptively adjusted to change the output power distribution ratio of the engine 100. This ensures that the engine 100 can maintain its high-efficiency operating range for an extended period while still meeting the wheel end speed requirements, thereby comprehensively improving the overall energy utilization efficiency of the vehicle.

[0145] In some embodiments, the engine 100 can be configured to operate in a high-efficiency speed range. When the SOC value of the power battery is less than a preset threshold, the first motor 200 is configured to adjust its own speed according to the current speed requirement of the vehicle and the speed of the engine 100. The preset threshold for the SOC value of the power battery can be set based on the optimal efficiency of actual electrical energy output. When the SOC value of the power battery is lower than the preset threshold, the first motor 200 can adjust its actual speed according to the current speed requirement of the vehicle (i.e., the speed requirement at the wheel ends) and the actual speed provided by the engine 100, to ensure that the engine 100 can still operate within the high-efficiency speed range while meeting the current speed requirement of the vehicle.

[0146] An embodiment of the eleventh aspect of this disclosure provides a vehicle including any of the above-described hybrid powertrains, and thus possesses all the technical features of any of the above-described hybrid powertrains, which will not be elaborated here.

[0147] An embodiment of the twelfth aspect of this disclosure provides a vehicle control method, referring to... Figure 14 This method is applied to the aforementioned vehicles equipped with a hybrid powertrain, which may include an engine 100, a first electric motor 200, and a planetary gear set 300. The control method may include: when the engine 100 is power-splitting through the planetary gear set 300, adjusting the speed of the first electric motor 200 based on the wheel-end speed requirements to maintain the engine 100 within a target operating speed range.

[0148] In the above embodiment, the engine 100, the first motor 200, and the input shaft 410 (which can be considered as a wheel end) can each be connected to a transmission component of the planetary gear set 300. Part of the power output by the engine 100 can be transmitted to the first motor 200 through the planetary gear set 300 to achieve power splitting. When the speed requirement of the wheel end changes, the first motor 200 can adjust its speed to change the proportion of power output from the engine 100 through the planetary gear set 300, thereby maintaining the engine 100 in the target operating speed range (i.e., the high-efficiency speed operating range) while meeting the speed requirement of the wheel end.

[0149] For example, the control method may further include acquiring the SOC value of the power battery, and when the SOC value of the power battery is less than a preset threshold, controlling the first motor 200 to adjust its speed according to the current speed requirement of the vehicle and the speed of the engine 100. In this embodiment, when the SOC value of the power battery is lower than the preset threshold, the first motor 200 can adjust its actual speed according to the current speed requirement of the vehicle (i.e., the speed requirement at the wheel end) and the actual speed provided by the engine 100, so as to ensure that the engine 100 can still operate in the high-efficiency speed operating range while meeting the current speed requirement of the vehicle, and the preset threshold can be set according to the optimal efficiency of the actual output of electrical energy.

[0150] In some embodiments, the hybrid powertrain may have a pure electric mode, a direct drive mode, a hybrid mode, and a parking power generation mode. Specifically, when the hybrid powertrain is in pure electric mode, the first motor 200 can drive the wheel ends; when the hybrid powertrain is in direct drive mode, the engine 100 can drive the wheel ends; when the hybrid powertrain is in hybrid mode, the engine 100 can drive the wheel ends and also drive the first motor 200 to generate electricity; and when the hybrid powertrain is in parking power generation mode, the engine 100 can drive the first motor 200 to generate electricity.

[0151] An embodiment of the thirteenth aspect of this disclosure provides a vehicle control method, referring to... ​ This method is applied to the aforementioned vehicles equipped with a hybrid powertrain, which may include an engine 100, a first electric motor 200, a planetary gear set 300, and a multi-gear transmission 400. The control method may include: when the engine 100 receives power through the planetary gear set 300, adjusting the speed of the first electric motor 200 based on the wheel-end speed demand to maintain the engine 100 within a target operating speed range; and adjusting the gear ratios of the transmission 400 based on the wheel-end torque demand to maintain the engine 100 within a target operating torque range.

[0152] In the above embodiment, the engine 100, the first motor 200, and the input shaft 410 (which can be considered as a wheel end) can be connected to a transmission component of the planetary gear set 300. Part of the power output by the engine 100 can be transmitted to the first motor 200 through the planetary gear set 300 to achieve power splitting, while another part of the power can be transmitted to the wheel end through the input shaft 410 and the transmission device 400. When the speed demand of the wheel end changes, the first motor 200 can adjust its speed to change the proportion of power output from the engine 100 through the planetary gear set 300, thereby keeping the engine 100 operating in the target operating speed range (i.e., the high-efficiency speed operating range) while meeting the speed demand of the wheel end. When the torque demand of the wheel end changes, the transmission device 400 can adjust the gear to change the output torque of the engine 100, thereby keeping the engine 100 operating in the target operating torque range (i.e., the high-efficiency torque operating range) while meeting the torque demand of the wheel end.

[0153] The target operating speed range and target operating torque range of engine 100 both belong to the high-efficiency operating range of engine 100. This control method can independently satisfy that engine 100 is in the target operating speed range or the target operating torque range, or it can simultaneously satisfy that engine 100 is in the high-efficiency operating range.

[0154] Furthermore, the vehicle control method provided in the thirteenth aspect of this disclosure can also refer to the vehicle control method shown in the twelfth aspect of this disclosure, which will not be described in detail here.

[0155] The hybrid powertrain provided in this disclosure, depending on different embodiments (whether or not it has a second motor 500 and whether or not it has an electric drive assembly 600), can have multiple operating modes. Depending on the engagement of the engine and motor, these modes may include direct drive mode (engine outputs power only), pure electric mode (motor outputs power only), hybrid mode (engine outputs power, motor outputs power or generates electricity), and parking generator mode (engine drives a generator to generate electricity). The first motor 200 can be a GM motor, and the second motor 500 can be a TM motor.

[0156] In the architecture that includes an engine 100 and a first electric motor 200, the assembly can have a hybrid mode, a direct drive mode, a pure electric mode, and a parking power generation mode.

[0157] For example, when the vehicle speed is higher than 30 km / h and the driving power demand is less than the engine output power corresponding to the vehicle's high-efficiency operating range, the hybrid powertrain is controlled to enter hybrid mode.

[0158] For example, when the vehicle speed is higher than 30 km / h and the driving power demand is within the engine output power range corresponding to the vehicle's efficient operating range, the hybrid powertrain is controlled to enter direct drive mode.

[0159] For example, when the vehicle speed is below 30 km / h and the SOC value of the power battery is greater than 50%, the hybrid powertrain is controlled to enter pure electric mode.

[0160] For example, when the vehicle speed is 0 and the SOC value of the power battery is less than 10%, the hybrid powertrain is controlled to enter the parking power generation mode.

[0161] II. In the architecture of the engine 100, the first motor 200 and the second motor 500, taking front-wheel drive as an example (of course, it can also be rear-wheel drive), the assembly can have a hybrid mode (only the first motor 200 is working, or both the first motor 200 and the second motor 500 are working), a direct drive mode (neither motor is working, or the second motor 500 is working), a GM pure electric mode (the first motor 200 is working, the second motor 500 is not working, or both the first motor 200 and the second motor 500 are working), and a parking generator mode (the second motor 500 is working or not working). The parking generator mode in which the second motor 500 is working can also be called the series mode.

[0162] III. In the configuration of engine 100, first motor 200, second motor 500 and electric drive assembly 600, taking engine 100, first motor 200 and second motor 500 acting on the front drive and electric drive assembly 600 acting on the rear drive as an example, this assembly can have front drive hybrid mode, front drive hybrid + rear drive mode, front drive direct drive mode, front drive direct drive + rear drive mode, front drive pure electric mode, front drive pure electric - rear drive mode, front drive parking generator mode, and front drive parking generator + rear drive mode (also known as series mode).

[0163] The various front-wheel drive modes in the third scenario can be referenced from the first and second scenarios above, and will not be elaborated further here.

[0164] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0165] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0166] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A hybrid powertrain, characterized in that, include: Engine (100); The first motor (200) is capable of generating electricity when driven by the engine (100); The speed change device (400) includes an input shaft (410); as well as A planetary gear set (300), at least partially housed within the first motor (200), the planetary gear set (300) comprising a sun gear (310), a planet carrier (320) having planet gears (321), and a ring gear (330). Among them, one of the sun gear (310), the planet carrier (320), and the gear ring (330) is connected to the first motor (200), one is connected to the input shaft (410), and the other is connected to the engine (100).

2. The hybrid powertrain according to claim 1, characterized in that, The planetary gear set (300) further includes a first coupling device (340) for selectively connecting one of the sun gear (310), the planet carrier (320), or the ring gear (330) that connects to the engine (100) to the input shaft (410).

3. The hybrid powertrain according to claim 1, characterized in that, The planetary gear set (300) also includes a second coupling device (350) for connecting or disconnecting the engine (100) from the planetary gear set (300).

4. The hybrid powertrain according to claim 2, characterized in that, The first coupling device (340) is at least partially housed within the first motor (200).

5. The hybrid powertrain according to claim 1, characterized in that, The first motor (200) is coaxially arranged with the engine (100).

6. The hybrid powertrain according to claim 1, characterized in that, The transmission device (400) further includes an output shaft (420), at least one gear pair (430), and a gear shifting device (440). The at least one gear pair (430) transmits power between the input shaft (410) and the output shaft (420) through their respective gear shifting devices (440).

7. The hybrid powertrain according to claim 6, characterized in that, The at least one gear pair (430) includes multiple drive gear pairs, and the engine (100) can achieve multi-gear transmission through the multiple drive gear pairs.

8. The hybrid powertrain according to claim 6, characterized in that, The at least one gear pair (430) further includes a reverse gear pair (434), through which the engine (100) can achieve reverse gear transmission.

9. The hybrid powertrain according to claim 6, characterized in that, The gear shifting device (440) is disposed on one of the input shaft (410) or the output shaft (420).

10. The hybrid powertrain according to claim 6, characterized in that, The at least one gear pair (430) includes: Low gear; and High gear, gear ratio is 5-8.

11. The hybrid powertrain according to claim 1, characterized in that, The fixed speed ratio of the planetary gear set (300) is 1.8-3.

12. The hybrid powertrain according to claim 1, characterized in that, The engine (100) and the first motor (200) are arranged longitudinally.

13. The hybrid powertrain according to claim 6, characterized in that, The gear shifting device (440) is one of a synchronizer and a clutch.

14. The hybrid powertrain according to claim 1, characterized in that, The assembly consisting of the first motor (200), the transmission device (400), and the planetary gear set (300) has a width dimension of 500-600mm in the vehicle.

15. The hybrid powertrain according to claim 1, characterized in that, The hybrid powertrain also includes a laterally arranged first differential (450) connected to the transmission (400), and there is a space between the engine (100), the planetary gear set (300), and the transmission (400). The connection between the engine (100) and the planetary gear set (300) and the first differential (450) are located within the accommodating space, and the first differential (450) and the connection at least partially overlap along the height direction of the vehicle.

16. The hybrid powertrain according to claim 1, characterized in that, The assembly consisting of the first motor (200), the transmission device (400), and the planetary gear set (300) has a height dimension of 550-630 mm in the vehicle.

17. The hybrid powertrain according to claim 12, characterized in that, The engine (100) and the first electric motor (200) are arranged longitudinally along the front-rear direction of the vehicle.

18. The hybrid powertrain according to claim 1, characterized in that, The dimensions of the assembly consisting of the first motor (200), the transmission device (400), and the planetary gear set (300) in the width direction of the vehicle are: vehicle width = 0.25-0.35:

1.

19. The hybrid powertrain according to claim 1, characterized in that, The dimensions of the assembly consisting of the first motor (200), the transmission device (400), and the planetary gear set (300) in the height direction of the vehicle are: vehicle height = 0.25-0.35:

1.

20. The hybrid powertrain according to claim 1, characterized in that, The transmission device (400) is a parallel shaft multi-speed transmission.

21. A vehicle, characterized in that, The hybrid powertrain includes any one of claims 1-20.

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