Hybrid powertrain, vehicle, and vehicle control method

Abstract

A hybrid powertrain, comprising an engine (100), a first motor (200), a transmission device (400), a planetary gear set (300), and a first coupling device (340). The first motor (200) can generate power under the driving of the engine (100); the transmission device (400) comprises an input shaft (410); the planetary gear set (300) comprises a sun gear (310), a planet carrier (320) having planetary gears (321), and a ring gear (330); the sun gear (310) is connected to the first motor (200), the planet carrier (320) is connected to the input shaft (410), and the ring gear (330) is connected to the engine (100), and is selectively connected to the input shaft (410) by means of the first coupling device (340). Also provided are a vehicle and a vehicle control method.

Description

Hybrid powertrain, vehicle and vehicle control methods

[0001] This application claims priority to Chinese patent application No. 202410526914.5, filed on April 26, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of vehicle technology, and more particularly to a hybrid powertrain, a vehicle, and a vehicle control method. Background Technology

[0003] Hybrid vehicles can be powered by either gasoline or electricity. The engine can output power to the wheels via a transmission (or gearbox, reducer, etc.) and can also drive a generator to produce electricity. Summary of the Invention

[0004] The purpose of this disclosure is to provide a hybrid powertrain, a vehicle, and a vehicle control method to at least partially solve the problems existing in the related art.

[0005] To achieve the above objectives, in one respect, some embodiments of this disclosure provide a hybrid powertrain. The hybrid powertrain includes: an engine, a first electric motor, a transmission, a planetary gear set, and a first coupling device. The first electric motor is capable of generating electricity when driven by the engine. The transmission includes an input shaft. The planetary gear set includes a sun gear, a planet carrier with planet gears, and a ring gear. A first of the sun gear, the planet carrier, and the ring gear is connected to the first electric motor, a second is connected to the input shaft, and a third is connected to the engine and selectively connected to the input shaft via the first coupling device.

[0006] In some embodiments, the hybrid powertrain further includes a second coupling device for connecting or disconnecting the engine from the planetary gear set.

[0007] In some embodiments, at least a portion of the planetary gear set is housed within the first motor.

[0008] In some embodiments, at least a portion of the first coupling device is housed within the first motor.

[0009] In some embodiments, the planetary 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 disposed on the input shaft, and the planetary carrier is selectively connected to the input shaft through the first coupling device.

[0010] In some embodiments, the first motor is coaxially arranged with the engine.

[0011] In some embodiments, the transmission device further includes an output shaft, at least one gear pair and at least one gear shifting device, wherein the at least one gear pair transmits power between the input shaft and the output shaft through their respective gear shifting devices.

[0012] In some embodiments, the at least one gear pair includes multiple drive gear pairs, and the engine performs multi-gear transmission through the multiple drive gear pairs.

[0013] In some embodiments, the at least one gear pair includes a reverse gear pair, through which the engine performs reverse gear transmission.

[0014] In some embodiments, the gear shifting device is disposed on one of the input shaft and the output shaft.

[0015] In some embodiments, the at least one gear pair includes a low-speed gear and a high-speed gear. The gear ratio of the low-speed gear is 2.5-3.3. The gear ratio of the high-speed gear is 5-8.

[0016] In some embodiments, the fixed speed ratio of the planetary gear set is 1.8-3.

[0017] In some embodiments, the engine and the first motor are arranged along a first direction.

[0018] In some embodiments, the hybrid powertrain further includes a second motor that outputs power to the transmission.

[0019] In some embodiments, the second motor is coaxially arranged with the engine.

[0020] In some embodiments, the second motor is disposed on the input shaft. The second motor is located on the side of the gear pair away from the planetary gear set, or the second motor is located between the first coupling device and the transmission device.

[0021] In some embodiments, the second motor is arranged on a different axis from the engine.

[0022] In some embodiments, the hybrid powertrain further includes a first transmission gear pair, through which the second motor is connected to the input shaft.

[0023] In some embodiments, the second motor is located on the side of the first transmission gear pair closer to the speed change device.

[0024] In some embodiments, the hybrid powertrain further includes an output shaft and a second transmission gear pair, wherein the second motor is connected to the output shaft via the second transmission gear pair.

[0025] In some embodiments, the second motor is located on the side of the second transmission gear pair closer to the speed change device.

[0026] In some embodiments, the hybrid powertrain further includes an electric drive assembly and a power battery. The power battery is connected to the electric drive assembly and the first motor, respectively. The engine drives one of the front axle and the rear axle, and the electric drive assembly drives the other of the front axle and the rear axle.

[0027] In some embodiments, the electric drive assembly further includes a wheel-end decoupler, wherein when the wheel-end decoupler decouples, the electric drive assembly is disconnected from the wheel end.

[0028] In some embodiments, the electric drive assembly further includes a differential lock. When the wheel-end decouplers are coupled and the differential lock is engaged, the two wheel ends rotate synchronously.

[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] On the other hand, some embodiments of this disclosure also provide a hybrid powertrain. This hybrid powertrain includes: an engine, a first electric motor, a transmission, and a planetary gear set. The first electric motor is capable of generating electricity when driven by the engine. The transmission includes an input shaft, an output shaft, a plurality of drive gear pairs disposed between the input shaft and the output shaft, and a plurality of gear shifting devices. The plurality of drive gear pairs transmit power between the input shaft and the output shaft through their respective corresponding gear shifting devices to achieve multi-speed transmission. The planetary gear set includes a sun gear, a planet carrier with planet gears, and a ring gear. A first of the sun gear, the planet carrier, and the ring gear is connected to the first electric motor, a second is connected to the input shaft, and a third is connected to the engine.

[0031] In some embodiments, 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 different torque requirements of the vehicle.

[0032] In some embodiments, the first motor is configured to: when the state of charge (SOC) value of the power battery is less than a preset threshold, adjust its own speed according to the current speed requirement of the vehicle and the current speed of the engine.

[0033] In some embodiments, the transmission device is a parallel-shaft multi-speed transmission.

[0034] In another aspect, some embodiments of this disclosure also provide a hybrid powertrain. The hybrid powertrain includes: an engine, a first electric motor, a transmission, and a planetary gear set. The first electric motor is capable of generating electricity when driven by the engine. The transmission includes an input shaft. The planetary gear set includes a sun gear, a planet carrier with planet gears, and a ring gear. A first of the sun gear, the planet carrier, and the ring gear is connected to the first electric motor, a second is connected to the input shaft, and a third is connected to the engine. The engine and the first electric motor are arranged along a first direction.

[0035] In another aspect, some embodiments of this disclosure also provide a hybrid powertrain. The hybrid powertrain includes: an engine arranged along a first direction, a first motor arranged along the first direction, a transmission, and a planetary gear set. The first motor is capable of generating electricity when driven by the engine. The transmission includes an input shaft. The planetary gear set includes a sun gear, a planet carrier with planet gears, and a ring gear. A first of the sun gear, the planet carrier, and the ring gear is connected to the first motor, a second is connected to the input shaft, and a third is connected to the engine. The hybrid powertrain consisting of the first motor, the transmission, and the planetary gear set has a dimension of 500-600 mm in a second direction. The second direction is perpendicular to the first direction.

[0036] In some embodiments, at least a portion of the planetary gear set is housed within the first motor, and the hybrid powertrain consisting of the first motor, the transmission, and the planetary gear set has a dimension of 800-900 mm in the first direction.

[0037] In some embodiments, the hybrid powertrain further includes a first differential arranged along the second direction, the first differential being connected to the transmission, and a accommodating space between the engine, the planetary gear set, and the transmission. The connection portion 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 portion at least partially overlap in a third direction. This third direction is perpendicular to both the first direction and the second direction.

[0038] In some embodiments, the hybrid powertrain consisting of the first motor, the transmission, and the planetary gear set has a dimension of 550-630 mm in the third direction.

[0039] In another aspect, some embodiments of this disclosure also provide a hybrid powertrain. The hybrid powertrain includes: an engine arranged along a first direction, a first motor arranged along the first direction, a transmission, and a planetary gear set. The first motor is capable of generating electricity when driven by the engine. The transmission includes an input shaft. The planetary gear set includes a sun gear, a planet carrier with planet gears, and a ring gear. A first of the sun gear, the planet carrier, and the ring gear is connected to the first motor, a second is connected to the input shaft, and a third is connected to the engine. The hybrid powertrain consisting of the first motor, the transmission, and the planetary gear set has a dimension of 800-900 mm in the first direction.

[0040] In another aspect, some embodiments of this disclosure also provide a hybrid powertrain. The hybrid powertrain includes: an engine arranged along a first direction, a first motor arranged along the first direction, a transmission, and a planetary gear set. The first motor is capable of generating electricity when driven by the engine. The transmission includes an input shaft. The planetary gear set includes a sun gear, a planet carrier with planet gears, and a ring gear. A first of the sun gear, the planet carrier, and the ring gear is connected to the first motor, a second is connected to the input shaft, and a third is connected to the engine. The hybrid powertrain consisting of the first motor, the transmission, and the planetary gear set has a dimension of 550-630 mm in a third direction. The first direction is perpendicular to the third direction.

[0041] Furthermore, some embodiments of this disclosure also provide a hybrid powertrain. This hybrid powertrain includes: an engine arranged along a first direction, a first motor arranged along the first direction, a transmission, and a planetary gear set. The first motor is capable of generating electricity when driven by the engine. The transmission includes an input shaft. The planetary gear set includes a sun gear, a planet carrier with planet gears, and a ring gear. A first of the sun gear, the planet carrier, and the ring gear is connected to the first motor, a second is connected to the input shaft, and a third is connected to the engine. The ratio of the dimension of the hybrid powertrain consisting of the first motor, the transmission, and the planetary gear set in a second direction to the width of the vehicle body is 0.25-0.35. The second direction is perpendicular to the first direction.

[0042] In another aspect, some embodiments of this disclosure also provide a hybrid powertrain. The hybrid powertrain includes: an engine arranged along a first direction, a first motor arranged along the first direction, a transmission, and a planetary gear set. The first motor is capable of generating electricity when driven by the engine. The transmission includes an input shaft. The planetary gear set includes a sun gear, a planet carrier with planet gears, and a ring gear. A first of the sun gear, the planet carrier, and the ring gear is connected to the first motor, a second is connected to the input shaft, and a third is connected to the engine. The ratio of the dimension of the hybrid powertrain consisting of the first motor, the transmission, and the planetary gear set in the first direction to the length of the vehicle body is 0.15-0.2.

[0043] Furthermore, some embodiments of this disclosure also provide a hybrid powertrain. This hybrid powertrain includes: an engine arranged along a first direction, a first motor arranged along the first direction, a transmission, and a planetary gear set. The first motor is capable of generating electricity when driven by the engine. The transmission includes an input shaft. The planetary gear set includes a sun gear, a planet carrier with planet gears, and a ring gear. A first of the sun gear, the planet carrier, and the ring gear is connected to the first motor, a second is connected to the input shaft, and a third is connected to the engine. The ratio of the dimension of the hybrid powertrain consisting of the first motor, the transmission, and the planetary gear set in a third direction to the height of the vehicle body is 0.25-0.35. The third direction is perpendicular to the first direction.

[0044] In another aspect, some embodiments of this disclosure also provide a hybrid powertrain. The hybrid powertrain includes an engine, a first electric motor, a planetary gear set, and a first coupling device. The first electric motor is capable of generating electricity when driven by the engine. The planetary gear set includes a sun gear, a planet carrier with planetary gears, and a ring gear. A first of the sun gear, the planet carrier, and the ring gear is connected to the first electric motor, a second is connected to an input shaft, and a third is connected to the engine and selectively connected to the input shaft via the first coupling device. The first electric motor is configured to adjust the power generation speed according to the operating speed requirements at the wheel ends, so that the engine is maintained within a target operating speed range.

[0045] In some embodiments, the engine is configured to operate in a high-efficiency speed range, and the first motor is configured to adjust its own speed according to the vehicle's current speed requirement and the engine speed when the SOC value of the power battery is less than a preset threshold.

[0046] In another aspect, some embodiments of this disclosure also provide a vehicle. This vehicle includes the aforementioned hybrid powertrain.

[0047] Furthermore, some embodiments of this disclosure also provide a vehicle control method. This method is 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:

[0048] 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 so that the engine is maintained in the target operating speed range.

[0049] In some embodiments, the control method further includes: 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 to adjust its speed according to the current speed requirement of the vehicle and the speed of the engine.

[0050] In some embodiments, the hybrid powertrain includes: a pure electric mode, a direct drive mode, a hybrid mode, and a parking power generation mode. In the pure electric mode, the first motor drives the wheel ends. In the direct drive mode, the engine drives the wheel ends. In the hybrid mode, the engine drives the wheel ends, and the engine also drives the first motor to generate electricity. In the parking power generation mode, the engine drives the first motor to generate electricity.

[0051] Furthermore, some embodiments of this disclosure also provide a vehicle control method. This method is 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-gear transmission. The control method includes:

[0052] 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 device is adjusted according to the wheel end torque requirement to keep the engine in the target operating torque range.

[0053] 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.

[0054] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0055] 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:

[0056] Figure 1 is a schematic diagram of a hybrid powertrain according to some embodiments;

[0057] Figure 2 is a schematic diagram of another hybrid powertrain according to some embodiments;

[0058] Figure 3 is a schematic diagram of yet another hybrid powertrain according to some embodiments;

[0059] Figure 4 is a schematic diagram of yet another hybrid powertrain according to some embodiments;

[0060] Figure 5 is a schematic diagram of yet another hybrid powertrain according to some embodiments;

[0061] Figure 6 is a schematic diagram of yet another hybrid powertrain according to some embodiments;

[0062] Figure 7 is a schematic diagram of yet another hybrid powertrain according to some embodiments;

[0063] Figure 8 is a schematic diagram of yet another hybrid powertrain according to some embodiments;

[0064] Figure 9 is a schematic diagram of yet another hybrid powertrain according to some embodiments;

[0065] Figure 10 is a schematic diagram of yet another hybrid powertrain according to some embodiments;

[0066] Figure 11 is a schematic diagram of yet another hybrid powertrain according to some embodiments;

[0067] Figure 12 is a schematic diagram of yet another hybrid powertrain according to some embodiments;

[0068] Figure 13 is a block diagram of a vehicle according to some embodiments;

[0069] Figure 14 is a block diagram of a vehicle control method according to some embodiments;

[0070] Figure 15 is a block diagram of a vehicle control method according to some embodiments.

[0071] Figure label:

[0072] 1000 - Hybrid powertrain, 2000 - Vehicle

[0073] 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

[0074] 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.

[0075] 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 some embodiments of this disclosure, unless explicitly stated or contradictory, can refer to a direct connection or an indirect connection (i.e., a connection via another intermediate component).

[0076] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0077] First, it should be noted that the technical solutions of some embodiments of this disclosure are described in the following text from multiple aspects. In the absence of contradiction, embodiments from different aspects can be combined with each other.

[0078] In related technologies, for vehicles that can output power through both an internal combustion engine (i.e., an engine) and an electric motor, the engine speed and torque cannot be decoupled from the wheel-end speed and torque; that is, the two are usually linearly related. This prevents the engine from operating in its high-efficiency range for extended periods.

[0079] Therefore, this disclosure provides a hybrid powertrain in some embodiments. As shown in Figures 1 to 3, the hybrid powertrain 1000 includes an engine 100, a first motor 200, a planetary gear set 300, and a transmission 400. The first motor 200 generates electricity driven by the engine 100. The transmission 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. The sun gear 310, planet carrier 320, and ring gear 330 can be connected to the first motor 200, the second to the input shaft 410, and the third to the engine 100. In this way, the engine 100, the first motor 200, and the input shaft 410 (which may represent a part of the wheel end) are each connected to a transmission component of the planetary gear set 300. That is, the power transmitted from the engine 100 to the input shaft 410 is also constrained by the first motor 200, i.e., decoupling is achieved between the engine 100 and the input shaft 410.

[0080] In this configuration, the hybrid powertrain 1000 also includes a first coupling device 340. A third party connecting the sun gear 310, planet carrier 320, and ring gear 330 to the engine 100 is also selectively connected to the input shaft 410 via the first coupling device 340.

[0081] 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 as to directly drive the wheel end to rotate when the engine 100 is engaged with the input shaft 410. At this time, part of the power output by the engine 100 can be transmitted to the first motor 200 for shunt through the planetary gear set 300. 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 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.

[0082] 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 generates power loss. However, this power loss can be effectively utilized by the power diversion through the first motor 200. Furthermore, since various factors such as road conditions or weather may cause changes in the wheel speed requirements during actual vehicle operation, 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 requirements, eliminating the need for active power adjustment based on wheel speed demands. Consequently, this improves the engine 100's performance in terms of fuel economy, emissions, and power.

[0083] In some embodiments, as shown in Figures 1 to 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 closer to the engine 100 or closer to 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.

[0084] In some embodiments, as shown in Figures 1 to 3, the planetary gear set 300 may be at least partially housed within the first motor 200. For example, a portion of the structure of the planetary gear set 300 may be hidden within the first motor 200 to reduce the overall volume of the planetary gear set 300, which facilitates the rational arrangement of the hybrid powertrain within the vehicle's interior space and thereby improves the driving and riding experience for occupants.

[0085] In some embodiments, as shown in Figures 1 to 3, the first coupling device 340 may be at least partially housed within the first motor 200. For example, a portion of the structure of the first coupling device 340 may be hidden within the first motor 200 to reduce the volume occupied by the first coupling device 340 in the vehicle's interior space, improve the utilization rate of the vehicle's interior space, and provide better comfort for the occupants.

[0086] In some embodiments, 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.

[0087] In some embodiments, as shown in Figures 1 to 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 disposed on the input shaft 410. The planetary carrier 320 can be selectively connected to the input shaft 410 through the first coupling device 340.

[0088] 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 through the sun gear 310, so that 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 be driven to rotate by the planetary carrier 320 through the ring gear 330, so that part of the power of the engine 100 can be transmitted to the wheel ends through the input shaft 410 to drive the vehicle. Furthermore, the first coupling device 340 provided on the input shaft 410 can selectively connect the planetary carrier 320 to the input shaft 410, so that the engine 100 directly drives the wheel end when the first coupling device 340 engages the planetary carrier 320 with the input shaft 410, and decouples from the wheel end when the first coupling device 340 disconnects the planetary carrier 320 from the input shaft 410, thereby effectively improving the linear correlation effect between the engine 100 and the wheel end, so that the engine 100 can maintain in the high-efficiency operating range for a long time.

[0089] In some 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, the planet 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. The solution shown in Figure 12 also has the effects of the above embodiments, which will not be elaborated here.

[0090] In some embodiments, the first motor 200 can be coaxially arranged 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, thus providing the driver with a smoother driving experience. Furthermore, the coaxial arrangement can reduce the transmission connection structure between the engine 100 and the first motor 200, reasonably improving the utilization of interior space.

[0091] In some embodiments, as shown in Figures 1 to 3, the transmission device 400 may further include an output shaft 420, at least one gear pair 430, and at least one 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.

[0092] Furthermore, the gear shifting device 440 can be either a synchronizer or a clutch. The gear shifting device 440 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. In some embodiments, to improve structural compactness, adjacent gear shifting devices 440 can be integrated. For example, taking the hybrid powertrain shown in FIG1 as an example, the first gear shifting device 441 and the second gear shifting device 442 are integrated into one unit and mounted on the output shaft 420 in the form of dual synchronizers or dual clutches. The first gear shifting device 441 and the second gear shifting device 442 will be described later.

[0093] In some embodiments, as shown in Figures 1 to 3, the gear pair 430 may 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. Furthermore, the gear pair 430 is closer to the wheel ends relative to the planetary gear set 300, thus ensuring timely response and smooth operation when shifting gears according to the torque requirements at the wheel ends, and also improving the rationality of the interior space layout.

[0094] In some embodiments, as shown in Figures 1 to 11, at least one gear pair 430 may include multiple drive gear pairs, and the engine 100 can achieve multi-gear transmission through these multiple drive gear pairs. The multiple drive gear pairs may be arranged sequentially between the input shaft 410 and the output shaft 420. For example, as shown in Figure 1, 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. Correspondingly, at least one gear shifting device 440 includes a first gear shifting device 441, a second gear shifting device 442, and a third gear shifting device 443. The first drive gear pair 431 transmits power through the first gear shifting device 441, the second drive gear pair 432 transmits power through the second gear shifting device 442, and the third drive gear pair 433 transmits power through the third gear shifting device 443.

[0095] In some embodiments, as shown in FIG1, at least one gear pair 430 may further include a reverse gear pair 434, through which the engine 100 can achieve reverse gear transmission. The reverse gear pair 434 may be located on the side of the plurality of drive gear pairs away from the planetary gear set 300, which is beneficial for the rational arrangement of interior space and facilitates the installation or disassembly of the structure according to the actual reverse gear transmission usage requirements. In this case, at least one gear shifting device 440 further includes a fourth gear shifting device 444, through which the reverse gear pair 434 can achieve power transmission.

[0096] In some embodiments, as shown in Figures 1 to 3, the gear shifting device 440 may be disposed on one of the input shaft 410 and the output shaft 420. The inter-shaft arrangement of the gear shifting device 440 can be adaptively changed according to the structural layout of the input shaft 410, the output shaft 420 and the related components between them, thereby improving the utilization rate of vehicle interior space and giving the gear shifting device 440 a more flexible assembly applicability.

[0097] In some embodiments, at least one gear pair 430 may include a low-speed gear and a high-speed gear. For example, as shown in FIG3, at least one gear pair 430 includes 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. For example, the gear ratio of the low-speed gear is 2.5, 2.7, 2.9, 3.1, or 3.3, etc., and the gear ratio of the high-speed gear is 5, 6, 7, or 8, etc. In this way, the different gear pairs 430, within their respective corresponding speed output ranges, provide a smoother gear shifting effect for the vehicle as a whole, improving the driving experience for passengers and ensuring that the engine 100 has good fuel economy in different gear speed output ranges.

[0098] In some embodiments, the fixed speed ratio of the planetary gear set can be 1.8-3. For example, the fixed speed ratio of the planetary gear set can be 1.8, 2, 2.2, 2.4, 2.6, 2.8, or 3, etc. In this way, the output power distribution of the engine 100 is close to a higher transmission efficiency ratio, further optimizing the power distribution of the engine 100 and reducing energy loss and fuel consumption. It should be explained 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.

[0099] In some embodiments, as shown in Figures 8 and 9, the engine 100 and the first motor 200 can be arranged longitudinally (i.e., in the first direction), meaning that the output shaft of the engine 100 and the axis of the first motor 200 both extend in the longitudinal direction of the vehicle, thereby reducing the space occupied by the overall structure of the hybrid powertrain in the lateral direction of the vehicle (i.e., in the second direction). Since the longitudinal length of a vehicle is generally 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 of the vehicle (i.e., the length direction), thus allowing for more space in the wheel arrangement along the lateral direction of the vehicle (i.e., the width direction). It should be noted that the first direction is perpendicular to the second direction.

[0100] In some embodiments, as shown in Figures 1 to 3, the hybrid powertrain may further include a first differential 450. The first differential 450 is arranged in the lateral direction of the vehicle and is used to convert 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.

[0101] In some embodiments, as shown in Figures 4 to 7, the hybrid powertrain may further include a second motor 500 for outputting power to the transmission 400.

[0102] In some embodiments, as shown in Figures 4 and 5, the second motor 500 can be coaxially arranged with the engine 100, achieving a coaxial integrated configuration. This improves the utilization efficiency of the output energy of both motors, optimizes their cooperation, and makes the power output of the entire vehicle efficient and smooth, thus enhancing the driving experience. Furthermore, the coaxial arrangement can reduce the transmission connection structure between the engine 100 and the second motor 500, thereby reasonably improving the utilization rate of the vehicle's interior space.

[0103] In some embodiments, as shown in Figures 4 and 5, the second motor 500 may be disposed on the input shaft 410. The second motor 500 may be located on the side of at least one gear pair 430 away from the planetary gear set 300, or the second motor 500 may 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 rationally allocate the spatial structure layout of the hybrid powertrain within the vehicle.

[0104] In some embodiments, as shown in Figures 6 and 7, the second motor 500 may be configured off-axis from the engine 100. In this way, when the overall structure of the transmission 400 is relatively compact and the space layout of the hybrid powertrain in the vehicle is relatively tight, the second motor 500 can be reasonably placed in a relatively spacious area inside the vehicle. The second motor 500 can be configured off-axis from the engine 100 through a related structure that is connected to the input shaft 410 for transmission.

[0105] In some embodiments, as shown in Figures 6 and 7, the hybrid powertrain may further include a first transmission gear pair 510. The second motor 500 can be connected to the input shaft 410 via the first transmission gear pair 510, and the first transmission gear pair 510 can transmit the output power of the second motor 500 to the input shaft 410.

[0106] In some embodiments, as shown in Figures 6 and 7, the second motor 500 may be located on the side of the first transmission gear pair 510 closer to the transmission device 400, and the first transmission gear pair 510 may also be disposed 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 to reasonably allocate the spatial structure layout of the hybrid powertrain in the vehicle.

[0107] In some embodiments, as shown in Figures 10 and 11, the hybrid powertrain may further include a second transmission gear pair 520. The second motor 500 can be connected to the output shaft 420 via the second transmission gear pair 520. The second transmission gear pair 520 can transmit the output power of the second motor 500 to the output shaft 420.

[0108] In some embodiments, as shown in Figures 10 and 11, the second motor 500 may be located on the side of the second transmission gear pair 520 closer to the transmission 400, so that the spatial arrangement of the second motor 500 and the transmission 400 is more compact, reducing the volume occupied by the hybrid powertrain in the vehicle interior. Furthermore, the second transmission gear pair 520 may also be located on the side of the output shaft 420 away from the transmission 400. The engagement position of the second transmission gear pair 520 can be adjusted according to the specific requirements of the vehicle interior volume, thus rationally allocating the spatial structure layout of the hybrid powertrain within the vehicle.

[0109] In some embodiments, the second motor 500 may be offset from the transmission 400 to make reasonable use of the space between them, saving interior space and making the spatial layout of the second motor 500 relative to the transmission 400 more compact. The second motor 500 may be at least partially hidden in the transmission 400.

[0110] In some embodiments, as shown in Figures 8 and 9, the hybrid powertrain may further include an electric drive assembly 600 and a power battery. The power battery may be connected to both the electric drive assembly 600 and the first motor 200. 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.

[0111] 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. Furthermore, 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 some drive 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, allowing the first motor 200 to be flexibly used for energy conversion during vehicle operation.

[0112] In some embodiments, the electric drive assembly 600 may further include a wheel-end decoupler. When the wheel-end decoupler decouples, the electric drive assembly 600 can be disconnected from the wheel ends. Taking the engine 100 and the first motor 200 as front-drive and the electric drive assembly 600 as rear-drive as an example, when the power of the front-drive is sufficient, the electric drive assembly 600 can be decoupled from the wheel ends, thereby avoiding drag losses, that is, preventing the wheel-end's movement from reacting to the electric drive assembly 600.

[0113] In some embodiments, the electric drive assembly 600 may also include a differential lock. When the wheel-end decouplers are coupled and the differential lock is engaged, synchronous rotation of both wheel ends is achieved, thereby assisting the vehicle in achieving off-road capability.

[0114] 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. When the wheel-end decoupler is coupled and the differential lock is not locked, differential transmission at the wheel ends can be achieved.

[0115] In some embodiments, the differential lock and wheel-end decoupler can be integrated and disposed on the same side of the differential gear set, for coupling or decoupling the electric drive assembly 600 from the wheel end, and coupling or decoupling the half-shaft from 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 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 differential can be fully utilized, resulting in a simple structure and a small footprint.

[0116] This disclosure also provides a hybrid powertrain in some embodiments. As shown in FIG1, the hybrid powertrain includes an engine 100, a first motor 200, a planetary gear set 300, and a transmission 400. The first motor 200 generates electricity when driven by the engine 100. The transmission 400 may include an input shaft 410, an output shaft 420, and multiple drive gear pairs disposed between the input shaft 410 and the output shaft 420, as well as multiple gear shifting devices 440. The multiple drive gear pairs can transmit power between the input shaft 410 and the output shaft 420 through their respective corresponding gear shifting devices 440 to perform multi-gear transmission. The planetary gear set 300 may include a sun gear 310, a planet carrier 320 having planet gears 321, and a ring gear 330. A first of the sun gear 310, the planet carrier 320, and the ring gear 330 may be connected to the first motor 200, a second may be connected to the input shaft 410, and a third may be connected to the engine 100.

[0117] 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 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 power distribution ratio of the engine 100, so that the engine 100 can operate within its high-efficiency operating range.

[0118] Furthermore, the multiple drive gear pairs and corresponding gear shifting devices 440 in the transmission 400 can achieve multi-gear power transmission between the input shaft 410 and the output shaft 420. When the wheel-end torque demand changes, the different gears of the transmission 400 can be switched to meet the wheel-end torque demand, so that the engine 100 can operate in the high-efficiency torque range. Thus, while simultaneously meeting the wheel-end speed and torque demands, the engine 100 can still maintain its high-efficiency operating range for a long time, thereby comprehensively improving the overall energy utilization efficiency of the vehicle.

[0119] In 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 different torque requirements of the vehicle. In this embodiment, the vehicle's torque requirement is the wheel-end torque requirement. When the torque output by the engine 100 or other power sources in the same power circuit is transmitted to the wheel-end via the transmission structure, this torque is the actual wheel-end torque. To ensure that the torque output by the engine 100 remains in the high-efficiency operating range while meeting the wheel-end torque requirement, 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 wheel-end torque requirement.

[0120] In some embodiments, the engine 100 can be configured to operate in a high-efficiency operating range. When the state of charge (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, and the preset threshold for the power battery SOC value can be set according to 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 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 output speed of the engine 100 operating in a high-efficiency operating range.

[0121] In some embodiments, the transmission 400 can be a parallel-shaft multi-speed transmission. This results in smooth gear shifting and high transmission efficiency, effectively improving the driver's driving experience. Furthermore, this parallel-shaft multi-speed transmission has lower manufacturing costs, more stable gear shifting, and a longer service life.

[0122] This disclosure also provides a hybrid powertrain in some embodiments. As shown in Figures 8 and 9, the hybrid powertrain includes an engine 100, a first electric motor 200, a planetary gear set 300, and a transmission 400. The first electric motor 200 generates electricity when driven by the engine 100. The transmission 400 may include an input shaft 410. The planetary gear set 300 may include a sun gear 310, a planet carrier 320 having planet gears 321, and a ring gear 330. A first of the sun gear 310, planet carrier 320, and ring gear 330 may be connected to the first electric motor 200, a second may be connected to the input shaft 410, and a third may be connected to the engine 100. The engine 100 and the first electric motor 200 are arranged longitudinally.

[0123] 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, 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 power distribution ratio of the engine 100, thereby ensuring that the engine 100 can maintain its high-efficiency operating range for an extended period while still meeting the wheel end speed requirements, thus comprehensively improving the overall energy utilization efficiency of the vehicle.

[0124] Furthermore, 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, 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 of the vehicle, allowing for more space to be accommodated in the wheel-to-wheel layout along the lateral direction of the vehicle.

[0125] This disclosure also provides a hybrid powertrain in some embodiments. As shown in Figures 8 and 9, the hybrid powertrain includes: a longitudinally arranged engine 100, a longitudinally arranged first motor 200, a planetary gear set 300, and a transmission 400. The longitudinally arranged first motor 200 generates electricity when driven by the longitudinally arranged 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. A first of the sun gear 310, planet carrier 320, and ring gear 330 may be connected to the first motor 200, a second may be connected to the input shaft 410, and a third may be connected to the engine 100. Furthermore, the hybrid powertrain consisting of the first motor 200, the transmission 400, and the planetary gear set 300 has a width dimension of 500-600 mm in the vehicle's width direction. For example, the hybrid powertrain consisting of the first motor 200, the transmission 400, and the planetary gear set 300 has dimensions of 500mm, 525mm, 550mm, 575mm, or 600mm in the width direction of the vehicle. This allows the hybrid powertrain to be arranged compactly in the width direction of the vehicle, reducing its space occupation.

[0126] In some embodiments, as shown in Figures 8 and 9, the planetary gear set 300 may be at least partially housed within the first motor 200. The hybrid powertrain consisting of the first motor 200, the transmission 400, and the planetary gear set 300 may have a longitudinal dimension of 800-900 mm in the vehicle's longitudinal direction. For example, the longitudinal dimension of the hybrid powertrain consisting of the first motor 200, the transmission 400, and the planetary gear set 300 may be 800 mm, 825 mm, 850 mm, 875 mm, or 900 mm, etc. Since the longitudinal length of a vehicle in the longitudinal direction is generally greater than its lateral length in the width direction, arranging the hybrid powertrain longitudinally along the vehicle's longitudinal direction results in a more rational spatial layout, and this length setting optimizes the vehicle's internal space structure.

[0127] In some embodiments, as shown in Figures 8 and 9, the hybrid powertrain may further include a laterally arranged first differential 450, which can be connected to the transmission 400. An accommodating space exists between the engine 100, the planetary gear set 300, and the transmission 400. The connection portion between the engine 100 and the planetary gear set 300, and the first differential 450 are located within this accommodating space. The first differential 450 and the connection portion may at least partially overlap along the vehicle's height direction (i.e., the third direction). Here, the third direction is perpendicular to the first and second directions. 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 engine 100, the planetary gear set 300, and the transmission 400 form an accommodating space capable of accommodating a certain volume. The connection portion between the engine 100 and the planetary gear set 300, and the first differential 450, can be disposed within this accommodating space to make the spatial arrangement of the hybrid powertrain more compact and reduce its volume percentage within the vehicle's interior space. Furthermore, 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 of the hybrid powertrain in the height direction of the vehicle, forming a composite space structure, providing more activity space for the driver and passengers, and improving the driving experience of the driver and passengers.

[0128] For example, the hybrid powertrain 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. For instance, the hybrid powertrain consisting of the first motor 200, the transmission 400, and the planetary gear set 300 may have height dimensions of 550mm, 570mm, 590mm, 610mm, or 630mm in the vehicle. This allows for full utilization of the vehicle's height-direction space layout, adapting to the height-direction space requirements of various vehicle models and improving passenger comfort.

[0129] In some embodiments, the ratio of the dimension of the hybrid powertrain consisting of the first motor 200, the transmission 400, and the planetary gear set 300 in the width direction of the vehicle to the width of the vehicle body can be 0.25-0.35. For example, this ratio can be 0.25, 0.27, 0.29, 0.31, 0.33, or 0.35. Here, the width direction of the vehicle refers to the lateral direction of the vehicle. By setting the dimension of the hybrid powertrain in the lateral direction of the vehicle to a ratio of 0.25-0.35 to the width of the vehicle body, 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.

[0130] In some embodiments, the ratio of the dimension of the hybrid powertrain consisting of the first motor 200, the transmission 400, and the planetary gear set 300 in the longitudinal direction of the vehicle to the length of the vehicle body can be 0.15-0.2. For example, this ratio can be 0.15, 0.17, 0.18, 0.19, or 0.2. Here, the longitudinal direction of the vehicle is the same as the longitudinal direction of the vehicle. By setting the dimension of the hybrid powertrain in the longitudinal direction of the vehicle to a ratio of 0.15-0.2 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.

[0131] In some embodiments, the ratio of the dimension of the hybrid powertrain consisting of the first motor 200, the transmission 400, and the planetary gear set 300 in the height direction of the vehicle to the height of the vehicle body can be 0.25-0.35. For example, this ratio can be 0.25, 0.27, 0.29, 0.31, 0.33, or 0.35. By setting the dimension of the hybrid powertrain in the height direction of the vehicle to a ratio of 0.25-0.35 to the height of the vehicle body, the interior space volume in the height direction of the vehicle can be fully utilized, thereby achieving a reasonable spatial layout of the hybrid powertrain in the height direction of the vehicle.

[0132] This disclosure also provides a hybrid powertrain in some embodiments. As shown in Figures 8 and 9, the hybrid powertrain includes: a longitudinally arranged engine 100, a longitudinally arranged first motor 200, a planetary gear set 300, and a transmission 400. The longitudinally arranged first motor 200 can generate electricity driven by the longitudinally arranged engine 100. The transmission 400 may include an input shaft 410. The planetary gear set 300 may include a sun gear 310, a planet carrier 320 having planet gears 321, and a ring gear 330. The first of the sun gear 310, planet carrier 320, and ring gear 330 can be connected to the first motor 200, the second can be connected to the input shaft 410, and the third can be connected to the engine 100. Furthermore, the hybrid powertrain 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. In this way, the spatial layout of the hybrid powertrain along the longitudinal direction of the vehicle is more reasonable, and this length setting can optimize the vehicle's internal space structure.

[0133] Other arrangements in this embodiment can be the same as those in the above embodiments, and will not be described again here.

[0134] This disclosure also provides a hybrid powertrain in some embodiments. As shown in Figures 8 and 9, the hybrid powertrain includes: a longitudinally arranged engine 100, a longitudinally arranged first motor 200, a planetary gear set 300, and a transmission 400. The longitudinally arranged first motor 200 can generate electricity driven by the longitudinally arranged engine 100. The transmission 400 may include an input shaft 410. The planetary gear set 300 may include a sun gear 310, a planet carrier 320 having planet gears 321, and a ring gear 330. The first of the sun gear 310, planet carrier 320, and ring gear 330 can be connected to the first motor 200, the second can be connected to the input shaft 410, and the third can be connected to the engine 100. Furthermore, the hybrid powertrain consisting of the first motor 200, the transmission 400, and the planetary gear set 300 has a dimension of 550-630 mm in the height direction of the vehicle. In this way, the space in the height direction of the vehicle can be fully utilized for layout, adapting to the space requirements of various vehicle models in the height direction and improving the comfort of the driver and passengers.

[0135] Other arrangements in this embodiment can be the same as those in the above embodiments, and will not be described again here.

[0136] This disclosure also provides a hybrid powertrain in some embodiments. As shown in Figures 8 and 9, the hybrid powertrain includes: an engine arranged in the longitudinal direction of the vehicle, a first motor arranged in the longitudinal direction of the vehicle, a transmission, and a planetary gear set. The first motor is capable of generating electricity when driven by the engine. The transmission may include an input shaft. The planetary gear set includes a sun gear, a planet carrier with planet gears, and a ring gear. The sun gear, the planet carrier, and the ring gear are first connected to the first motor, second connected to the input shaft, and third connected to the engine. The ratio of the dimension of the hybrid powertrain consisting of the first motor, the transmission, and the planetary gear set in the width direction of the vehicle to the width of the vehicle body is 0.25-0.35. This allows for full utilization of the lateral space volume inside the vehicle, thereby achieving a reasonable spatial layout of the hybrid powertrain in the width direction of the vehicle.

[0137] Other arrangements in this embodiment can be the same as those in the above embodiments, and will not be described again here.

[0138] This disclosure also provides a hybrid powertrain in some embodiments. As shown in Figures 8 and 9, the hybrid powertrain includes: an engine arranged in the longitudinal direction of the vehicle, a first motor arranged in the longitudinal direction of the vehicle, a transmission, and a planetary gear set. The first motor is capable of generating electricity when driven by the engine. The transmission may include an input shaft. The planetary gear set includes a sun gear, a planet carrier with planet gears, and a ring gear. The sun gear, the planet carrier, and the ring gear are first connected to the first motor, second connected to the input shaft, and third connected to the engine. The ratio of the dimension of the hybrid powertrain consisting of the first motor, the transmission, and the planetary gear set in the longitudinal direction of the vehicle to the length of the vehicle body is 0.15-0.2. This allows for full utilization of the longitudinal space volume inside the vehicle, thereby achieving a reasonable spatial layout of the hybrid powertrain in the longitudinal direction of the vehicle.

[0139] Other arrangements in this embodiment can be the same as those in the above embodiments, and will not be described again here.

[0140] This disclosure also provides a hybrid powertrain in some embodiments. As shown in Figures 8 and 9, the hybrid powertrain includes: an engine arranged in the longitudinal direction of the vehicle, a first motor arranged in the longitudinal direction of the vehicle, a transmission, and a planetary gear set. The first motor is capable of generating electricity when driven by the engine. The transmission may include an input shaft. The planetary gear set includes a sun gear, a planet carrier with planet gears, and a ring gear. The sun gear, the planet carrier, and the ring gear are first connected to the first motor, second connected to the input shaft, and third connected to the engine. The ratio of the dimension of the hybrid powertrain consisting of the first motor, the transmission, and the planetary gear set in the height direction of the vehicle to the height of the vehicle body is 0.25-0.35. In this way, the interior space volume in the height direction of the vehicle can be fully utilized, thereby achieving a reasonable spatial layout of the hybrid powertrain in the height direction of the vehicle.

[0141] Other arrangements in this embodiment can be the same as those in the above embodiments, and will not be described again here.

[0142] This disclosure also provides a hybrid powertrain in some embodiments. The hybrid powertrain includes an engine 100, a first electric motor 200, a planetary gear set 300, and a first coupling device 340. The first electric motor 200 generates electricity driven by the 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. A first of the sun gear 310, planet carrier 320, and ring gear 330 may be connected to the first electric motor 200, a second to an input shaft 410, and a third to the engine 100. Furthermore, the third 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 the first coupling device 340. The first electric 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. This target operating speed range is the high-efficiency operating range of the engine 100.

[0143] 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, so as to directly drive the wheel end to rotate when the engine 100 is engaged with the input shaft 410. 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 wheel end speed requirement changes, the speed of the first motor 200 can be adaptively adjusted to change the distribution ratio of the engine 100's output power, thereby allowing the engine 100 to maintain a high-efficiency operating range for a long time while meeting the wheel end speed requirement, thus comprehensively improving the overall energy utilization efficiency of the vehicle.

[0144] In some embodiments, the engine 100 can be configured to operate in a high-efficiency speed operating 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 according to the highest 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, so that when the engine 100 operates in the high-efficiency speed operating range, it can meet the current speed requirement of the vehicle.

[0145] This disclosure also provides a vehicle 2000 according to some embodiments. As shown in FIG13, the vehicle includes the above-described hybrid powertrain 1000, and therefore the vehicle possesses all the technical features of the above-described hybrid powertrain, which will not be described in detail here.

[0146] This disclosure also provides a vehicle control method in some embodiments. The method is applied to the vehicle described above that has a hybrid powertrain, which may include an engine 100, a first electric motor 200, and a planetary gear set 300. As shown in FIG14, the control method may include the following steps:

[0147] In step 101, when the engine 100 performs power splitting through the planetary gear set 300, the speed of the first motor 200 is adjusted according to the wheel end speed requirements so that the engine 100 is maintained in the 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 for power distribution. When the wheel end speed requirement changes, the first motor 200 can adjust its speed to change the proportion of the output power output by the engine 100 through the planetary gear set 300, thereby enabling the engine 100 to operate in the target operating speed range (i.e., the high-efficiency speed operating range) while meeting the wheel end speed requirement.

[0149] In some embodiments, 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 ends) and the actual speed provided by the engine 100, so that the engine 100 can meet the current speed requirement of the vehicle while operating in the high-efficiency speed range. The preset threshold can be set according to the highest efficiency of the actual electrical energy output.

[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. 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 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] This disclosure also provides a vehicle control method in some embodiments, applicable to the aforementioned vehicle with a hybrid powertrain. The hybrid powertrain may include an engine 100, a first electric motor 200, a planetary gear set 300, and a multi-gear transmission 400. As shown in FIG15, the control method may include the following steps:

[0152] In step 201, when the engine 100 performs power splitting through the planetary gear set 300, the speed of the first motor 200 is adjusted according to the wheel end speed requirement so that the engine 100 is maintained in the target operating speed range, and the gear of the transmission device 400 is adjusted according to the wheel end torque requirement so that the engine 100 is maintained in the target operating torque range.

[0153] 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. The first portion of the power output by the engine 100 can be transmitted to the first motor 200 via the planetary gear set 300 for power distribution. The second portion of the power output by the engine 100 can be transmitted to the wheel end via the input shaft 410 and the transmission device 400. When the speed requirement at the wheel end changes, the first motor 200 can adjust its speed to change the proportion of the output power output by the engine 100 through the planetary gear set 300, thereby ensuring that the engine 100 operates within the target operating speed range (i.e., the high-efficiency speed operating range) while meeting the speed requirement at the wheel end. Furthermore, when the torque requirement at the wheel end changes, the transmission device 400 can adjust the gear position to change the output torque of the engine 100, thereby ensuring that the engine 100 operates within the target operating torque range (i.e., the high-efficiency torque operating range) while meeting the torque requirement at the wheel end.

[0154] 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.

[0155] Furthermore, the vehicle control method provided in some embodiments of this disclosure can also be referred to the vehicle control method shown in the above embodiments of this disclosure, which will not be repeated here.

[0156] The hybrid powertrain provided in some embodiments of this disclosure can have multiple operating modes depending on the specific embodiment (whether or not it has a second motor 500 and an electric drive assembly 600). Depending on the engagement of the engine and motor, it can 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.

[0157] In an architecture that includes an engine 100 and a first electric motor 200, the hybrid powertrain can have a hybrid mode, a direct drive mode, a pure electric mode, and a parking power generation mode.

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

[0159] For example, when the vehicle speed is higher than 30km / h and the driving power demand is within the range of engine output power corresponding to the vehicle's efficient operating range, the hybrid powertrain is controlled to enter direct drive mode.

[0160] 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.

[0161] 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.

[0162] In an architecture comprising an engine 100, a first electric motor 200, and a second electric motor 500, taking front-wheel drive as an example (rear-wheel drive is also possible), the hybrid powertrain can have the following modes: hybrid mode (only the first electric motor 200 operates, or both the first electric motor 200 and the second electric motor 500 operate), direct drive mode (neither motor operates, or the second electric motor 500 operates), GM pure electric mode (the first electric motor 200 operates, the second electric motor 500 does not operate, or both the first electric motor 200 and the second electric motor 500 operate), and parking generator mode (the second electric motor 500 operates or does not operate). The parking generator mode in which the second electric motor 500 operates can also be called the series mode.

[0163] In an architecture comprising an engine 100, a first electric motor 200, a second electric motor 500, and an electric drive assembly 600, taking the engine 100, first electric motor 200, and second electric motor 500 operating in front-wheel drive, and the electric drive assembly 600 operating in rear-wheel drive as an example, this hybrid powertrain can have the following modes: front-wheel drive hybrid mode, front-wheel drive hybrid plus rear-wheel drive mode, front-wheel drive direct drive mode, front-wheel drive direct drive plus rear-wheel drive mode, front-wheel drive pure electric mode, front-wheel drive pure electric plus rear-wheel drive mode, front-wheel drive parking generator mode, and front-wheel drive parking generator plus rear-wheel drive mode (also known as series mode). The various front-wheel drive modes can be referenced in the above descriptions and will not be elaborated upon further here.

[0164] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present 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 (1000), comprising: 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); Planetary gear (300), including a sun gear (310), a planet carrier (320) with planet gears (321), and a ring gear (330); and First coupling device (340); The sun gear (310), the planet carrier (320), and the ring gear (330) are connected in the following ways: the first one is connected to the first motor (200), the second one is connected to the input shaft (410), and the third one is connected to the engine (100) and selectively connected to the input shaft (410) through the first coupling device (340).

2. The hybrid powertrain (1000) according to claim 1 further includes a second coupling device (350) configured to connect or disconnect the engine (100) from the planetary gear set (300).

3. The hybrid powertrain (1000) according to claim 1, wherein, At least a portion of the planetary gear set (300) is housed within the first motor (200).

4. The hybrid powertrain (1000) according to claim 1, wherein, At least a portion of the first coupling device (340) is housed within the first motor (200).

5. The hybrid powertrain (1000) according to claim 1, wherein, The planetary carrier (320) is connected to the engine (100), the sun gear (310) is connected to the first motor (200), the ring gear (330) is connected to the input shaft (410), the first coupling device (340) is disposed on the input shaft (410), and the planetary carrier (320) is selectively connected to the input shaft (410) through the first coupling device (340).

6. The hybrid powertrain (1000) according to claim 1, wherein, The first motor (200) is coaxially arranged with the engine (100).

7. The hybrid powertrain (1000) according to claim 1, wherein, The transmission device (400) further includes an output shaft (420), at least one gear pair (430), and at least one gear shifting device (440), wherein 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).

8. The hybrid powertrain (1000) according to claim 7, wherein, The at least one gear pair (430) includes multiple drive gear pairs, and the engine (100) can perform multi-gear transmission through the multiple drive gear pairs.

9. The hybrid powertrain (1000) according to claim 7, wherein, The at least one gear pair (430) includes a reverse gear pair (434), through which the engine (100) can be driven in reverse gear.

10. The hybrid powertrain (1000) according to claim 7, wherein, The at least one gear shifting device (440) is disposed on one of the input shaft (410) and the output shaft (420).

11. The hybrid powertrain (1000) according to claim 7, wherein, The at least one gear pair (430) includes: A low-speed gear, wherein the gear ratio of the low-speed gear is 2.5-3.3; and High-speed gear, the gear ratio of which is 5-8.

12. The hybrid powertrain (1000) according to claim 1, wherein, The fixed speed ratio of the planetary gear set (300) is 1.8-3.

13. The hybrid powertrain (1000) according to claim 1, wherein, The engine (100) and the first motor (200) are arranged along a first direction.

14. The hybrid powertrain (1000) according to claim 1 further includes a second motor (500) that outputs power to the transmission (400).

15. The hybrid powertrain (1000) according to claim 14, wherein, The second motor (500) is coaxially arranged with the engine (100).

16. The hybrid powertrain (1000) according to claim 14, wherein, The second motor (500) is disposed on the input shaft (410), and the second motor (500) satisfies one of the following: The second motor (500) is located on the side of the gear pair (430) away from the planetary gear set (300); or The second motor (500) is located between the first coupling device (340) and the speed change device (400).

17. The hybrid powertrain (1000) according to claim 14, wherein, The second motor (500) is arranged on a different axis from the engine (100).

18. The hybrid powertrain (1000) according to claim 17 further includes a first transmission gear pair (510), wherein the second motor (500) is connected to the input shaft (410) via the first transmission gear pair (510).

19. The hybrid powertrain (1000) according to claim 18, wherein, The second motor (500) is located on the side of the first transmission gear pair (510) closer to the speed change device (400).

20. The hybrid powertrain (1000) according to claim 17 further includes an output shaft (420) and a second transmission gear pair (520), wherein the second motor (500) is connected to the output shaft (420) via the second transmission gear pair (520).

21. The hybrid powertrain (1000) according to claim 20, wherein, The second motor (500) is located on the side of the second transmission gear pair (520) closer to the speed change device (400).

22. The hybrid powertrain (1000) according to claim 1, further comprising: Electric drive assembly (600); as well as The power battery is connected to the electric drive assembly (600) and the first motor (200) respectively. The engine (100) is configured to drive one of the front axle (700) and the rear axle (800), and the electric drive assembly (600) is configured to drive the other of the front axle (700) and the rear axle (800).

23. The hybrid powertrain (1000) according to claim 22, wherein, The electric drive assembly (600) also includes a wheel-end decoupler, which decouples the electric drive assembly (600) from the wheel end when the wheel-end decoupler is decoupled.

24. The hybrid powertrain (1000) according to claim 23, wherein, The electric drive assembly (600) also includes a differential lock, which allows the two wheel ends to rotate synchronously when the wheel end decoupler is coupled and the differential lock is locked.

25. A hybrid powertrain (1000), comprising: Engine (100); The first motor (200) is capable of generating electricity when driven by the engine (100); A transmission device (400) includes an input shaft (410), an output shaft (420), a plurality of drive gear pairs disposed between the input shaft (410) and the output shaft (420), and a plurality of gear shifting devices (440). The plurality of drive gear pairs transmit power between the input shaft (410) and the output shaft (420) through their respective gear shifting devices (440) to perform multi-gear transmission; and The planetary gear (300) includes a sun gear (310), a planet carrier (320) with planet gears (321), and a gear ring (330); The sun gear (310), the planet carrier (320), and the ring gear (330) are connected to the first motor (200), the second to the input shaft (410), and the third to the engine (100).

26. The hybrid powertrain (1000) according to claim 25, wherein, The engine (100) is configured to operate in a high-efficiency operating range, and the transmission (400) is configured to switch the plurality of drive gear pairs according to different torque requirements of the vehicle.

27. The hybrid powertrain (1000) according to claim 26, wherein, The first motor (200) is configured to adjust its own speed according to the current speed requirement of the vehicle and the current speed of the engine (100) when the state of charge (SOC) value of the power battery is less than a preset threshold.

28. The hybrid powertrain (1000) according to claim 25, wherein, The transmission device (400) is a parallel shaft multi-speed transmission.

29. A hybrid powertrain (1000), comprising: 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 The planetary gear (300) includes a sun gear (310), a planet carrier (320) with planet gears (321), and a gear ring (330); The sun gear (310), the planet carrier (320), and the ring gear (330) are connected in the following ways: the first one is connected to the first motor (200), the second one is connected to the input shaft (410), and the third one is connected to the engine (100). The engine (100) and the first motor (200) are arranged along a first direction.

30. A hybrid powertrain (1000), comprising: An engine (100) is arranged along a first direction; The first motor (200) arranged along the first direction is capable of generating electricity under the drive of the engine (100); The speed change device (400) includes an input shaft (410); as well as The planetary gear (300) includes a sun gear (310), a planet carrier (320) with planet gears (321), and a gear ring (330); Among them, the sun gear (310), the planet carrier (320), and the ring gear (330) are connected to the first motor (200), the second to the input shaft (410), and the third to the engine (100); The hybrid power assembly (1000) consisting of the first motor (200), the transmission device (400), and the planetary gear set (300) has a dimension of 500-600 mm in the second direction, which is perpendicular to the first direction.

31. The hybrid powertrain (1000) according to claim 30, wherein, At least a portion of the planetary gear set (300) is housed within the first motor (200), and the hybrid power assembly (1000) consisting of the first motor (200), the transmission (400), and the planetary gear set (300) has a dimension of 800-900 mm in the first direction.

32. The hybrid powertrain (1000) according to claim 30, further comprising a first differential (450) arranged along the second direction, the first differential (450) being connected to the transmission (400), and having a accommodating space between the engine (100), the planetary gear set (300), and the transmission (400). in, The connection between the engine (100) and the planetary gear set (300) and the first differential (450) are located within the accommodating space. The first differential (450) and the connection at least partially overlap in a third direction, which is perpendicular to the first direction and the second direction.

33. The hybrid powertrain (1000) according to claim 32, wherein, The hybrid powertrain (1000) consisting of the first motor (200), the transmission device (400), and the planetary gear set (300) has a dimension of 550-630 mm in the third direction.

34. A hybrid powertrain (1000), comprising: An engine (100) is arranged along a first direction; The first motor (200) arranged along the first direction is capable of generating electricity under the drive of the engine (100); The speed change device (400) includes an input shaft (410); as well as The planetary gear (300) includes a sun gear (310), a planet carrier (320) with planet gears (321), and a gear ring (330); Among them, the sun gear (310), the planet carrier (320), and the ring gear (330) are connected to the first motor (200), the second to the input shaft (410), and the third to the engine (100); The hybrid power assembly (1000) consisting of the first motor (200), the transmission device (400), and the planetary gear set (300) has a dimension of 800-900 mm in the first direction.

35. A hybrid powertrain (1000), comprising: An engine (100) is arranged along a first direction; The first motor (200) arranged along the first direction is capable of generating electricity under the drive of the engine (100); The speed change device (400) includes an input shaft (410); as well as The planetary gear (300) includes a sun gear (310), a planet carrier (320) with planet gears (321), and a gear ring (330); Among them, the sun gear (310), the planet carrier (320), and the ring gear (330) are connected to the first motor (200), the second to the input shaft (410), and the third to the engine (100); The hybrid power assembly (1000) consisting of the first motor (200), the transmission device (400), and the planetary gear set (300) has a dimension of 550-630 mm in the third direction, and the first direction is perpendicular to the third direction.

36. A hybrid powertrain (1000), comprising: Engines (100) arranged along the first direction; The first motor (200) arranged along the first direction is capable of generating electricity under the drive of the engine (100); The speed change device (400) includes an input shaft (410); as well as The planetary gear (300) includes a sun gear (310), a planet carrier (320) with planet gears (321), and a gear ring (330); Among them, the sun gear (310), the planet carrier (320), and the ring gear (330) are connected to the first motor (200), the second to the input shaft (410), and the third to the engine (100); The hybrid powertrain (1000) consisting of the first motor (200), the transmission device (400), and the planetary gear set (300) has a dimension in the second direction that is 0.25-0.35 the width of the vehicle body, and the second direction is perpendicular to the first direction.

37. A hybrid powertrain (1000), comprising: Engines (100) arranged along the first direction; The first motor (200) arranged along the first direction is capable of generating electricity under the drive of the engine (100); The speed change device (400) includes an input shaft (410); as well as The planetary gear (300) includes a sun gear (310), a planet carrier (320) with planet gears (321), and a gear ring (330); Among them, the sun gear (310), the planet carrier (320), and the ring gear (330) are connected to the first motor (200), the second to the input shaft (410), and the third to the engine (100); The ratio of the dimension of the hybrid powertrain (1000) consisting of the first motor (200), the transmission device (400), and the planetary gear set (300) in the first direction to the length of the vehicle body is 0.15-0.

2.

38. A hybrid powertrain (1000), comprising: Engines (100) arranged along the first direction; The first motor (200) arranged along the first direction is capable of generating electricity under the drive of the engine (100); The speed change device (400) includes an input shaft (410); as well as The planetary gear (300) includes a sun gear (310), a planet carrier (320) with planet gears (321), and a gear ring (330); Among them, the sun gear (310), the planet carrier (320), and the ring gear (330) are connected to the first motor (200), the second to the input shaft (410), and the third to the engine (100); The hybrid powertrain (1000), consisting of the first motor (200), the transmission device (400), and the planetary gear set (300), has a dimension in the third direction that is 0.25-0.35 to the height of the vehicle body, and the third direction is perpendicular to the first direction.

39. A hybrid powertrain (1000), comprising: Engine (100); The first motor (200) is capable of generating electricity when driven by the engine (100); Planetary gear (300), including a sun gear (310), a planet carrier (320) with planet gears (321), and a ring gear (330); and First coupling device (340); Among them, the sun gear (310), the planet carrier (320), and the ring gear (330) are connected to the first motor (200), the second to the input shaft (410), and the third to the engine (100) and selectively connected to the input shaft (410) through the first coupling device (340); The first motor (200) is configured to adjust the power generation speed according to the operating speed requirement of the wheel end, so that the engine (100) is maintained in the target operating speed range.

40. The hybrid powertrain (1000) according to claim 39, wherein, The engine (100) is configured to operate in a high-efficiency speed range, and 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) when the SOC value of the power battery is less than a preset threshold.

41. A vehicle (2000) comprising a hybrid powertrain (1000) according to any one of claims 1 to 40.

42. A vehicle control method applied to a vehicle (2000) having a hybrid powertrain (1000), wherein, The hybrid powertrain (1000) includes an engine (100), a first electric motor (200), and a planetary gear set (300); the control method includes: When the engine (100) distributes power through the planetary gear set (300), the speed of the first motor (200) is adjusted according to the wheel end speed requirement so that the engine (100) is maintained in the target operating speed range.

43. The vehicle control method according to claim 42, further comprising: The SOC value of the power battery is obtained. When the SOC value of the power battery is less than a preset threshold, the first motor (200) is controlled to adjust the speed according to the current speed requirement of the vehicle and the speed of the engine (100).

44. The vehicle control method according to claim 42, wherein, The hybrid powertrain (1000) has: In pure electric mode, the first motor (200) drives the wheel ends; In direct drive mode, the engine (100) drives the wheel ends; In a hybrid mode, the engine (100) drives the wheel ends, and the engine (100) drives the first motor (200) to generate electricity; and In the parking power generation mode, the engine (100) drives the first motor (200) to generate electricity.

45. A vehicle control method applied to a vehicle having a hybrid powertrain (1000), wherein, The hybrid powertrain (1000) includes an engine (100), a first electric motor (200), a planetary gear set (300), and a multi-speed transmission (400), and the control method includes: When the engine (100) performs power splitting through the planetary gear set (300), the speed of the first motor (200) is adjusted according to the wheel end speed requirement so that the engine (100) is maintained in the target operating speed range, and the gear of the transmission device (400) is adjusted according to the wheel end torque requirement so that the engine (100) is maintained in the target operating torque range.

Images