A front-wheel drive single-motor two-speed hybrid transmission

Abstract

This utility model relates to the field of hybrid power transmission technology, and in particular to a front-wheel drive single-motor two-speed hybrid power transmission. It is a front-wheel drive single-motor two-speed hybrid solution built upon a vehicle equipped with a rear-wheel pure electric drive system. It includes two power sources: an engine and a generator. It also includes a gear-clutch transmission system that performs power transmission, containing a clutch and a synchronizer. The clutch connects to the engine and determines whether the engine participates in operation; the synchronizer switches between the two gears and transmits power to the front wheels, determining whether the engine and generator participate in vehicle driving and the driving gear. On one hand, the generator can generate electricity to provide power to the vehicle and also participate in vehicle driving; on the other hand, the engine can drive the generator to generate electricity and also participate in vehicle driving. Combined with the rear-wheel pure electric drive system, it achieves two-speed four-wheel pure electric drive, range-extended drive, and two-speed four-wheel hybrid drive.

Description

Technical Field

[0001] This utility model relates to the field of hybrid transmission technology, and in particular to a front-wheel drive single-motor two-speed hybrid transmission. Background Technology

[0002] With the rapid growth of global car ownership, increasing pressure on energy, environment, and safety has accelerated the global trend towards energy conservation and electrification in the automotive industry. However, pure electric vehicles currently struggle to meet the demands of the market due to industry bottlenecks such as range anxiety, inadequate charging infrastructure, and the difficulty in achieving significant technological breakthroughs in power batteries in the short to medium term.

[0003] As a core component of the powertrain system of hybrid electric vehicles (HEV, PHEV), the hybrid transmission can improve the fuel economy and optimize the power performance of the vehicle under various operating conditions by controlling the power coupling between the engine and the electric motor in real time.

[0004] Many mid-to-large SUVs, MPVs, and pickup trucks, due to their size and weight, traditionally use a longitudinally mounted engine with rear-wheel drive or four-wheel drive. In the electrification process, these vehicles generally use a rear-wheel pure electric drive system, or combine it with a front-wheel pure electric drive system to form a four-wheel pure electric drive system. There are two ways to achieve hybridization: one is to retain the original rear-wheel or four-wheel pure electric drive system and add a range extender (comprising an engine and generator) independent of the vehicle's drive system to provide electricity for the vehicle's propulsion; the other is to retain the rear-wheel pure electric drive system and combine the front-wheel pure electric drive system and the range extender into a dual-motor front-wheel hybrid drive system. This type of dual-motor hybrid drive system includes dual-motor range-extended hybrid drive systems where neither the engine nor the generator participates in vehicle propulsion, as well as hybrid drive systems where the engine can participate in front-wheel drive in one or more gears.

[0005] Because the development and mass production of front-wheel drive hybrid transmissions with transverse engines were earlier and have become more widespread, some models with longitudinally mounted engines have been converted to a hybrid front-wheel drive system with transverse engines. However, it is more difficult to convert models with longitudinally mounted engines to a transverse engine system, so the longitudinal engine system needs to be retained.

[0006] Whether the engine is transverse or longitudinal, the implementation of dual-motor front-wheel hybrid drive involves three power sources: two motors and the engine. This results in a complex structure and high cost. If the two motors are combined into one, the generator can perform both power generation and drive functions, which can significantly reduce production costs and simplify the structure and control.

[0007] This hybrid transmission solution is a front-wheel drive single-motor two-speed hybrid transmission developed based on the above concept. Utility Model Content

[0008] The technical problem to be solved by this utility model is: in order to solve the problems existing in the prior art in the background art, a front-wheel drive single-motor two-speed hybrid transmission is provided, including two solutions: longitudinal engine and transverse engine.

[0009] Embodiment 1 of this utility model addresses the technical solution adopted for a front-wheel drive single-motor hybrid transmission with a longitudinally mounted engine: a front-wheel drive single-motor two-speed hybrid transmission, comprising:

[0010] Power source: consisting of an engine with shock absorbers and a generator (200); wherein the engine is longitudinally mounted;

[0011] Gear clutch transmission system: It includes an input flange and an input shaft coaxially arranged with the engine, a generator rotor shaft, a hybrid drive intermediate shaft and a front drive output shaft arranged parallel to the input shaft;

[0012] It also includes a front drive axle differential, which is located below the longitudinally mounted engine and is positioned perpendicular to the longitudinally mounted engine.

[0013] Furthermore, the input flange is splinedly connected to the shock absorber on the engine; the input shaft is connected to the input flange via a first clutch, and the input shaft is provided with a hybrid drive first drive gear and a hybrid drive second drive gear, which are fixed or splinedly connected to the input shaft.

[0014] Furthermore, a driven gear is provided on the generator rotor shaft. The driven gear is fixed to or splined to the generator rotor shaft, and the driven gear meshes with a hybrid drive second driving gear on the input shaft.

[0015] Furthermore, the hybrid drive intermediate shaft is provided with: a hybrid drive first driven gear, a hybrid drive second driven gear, a synchronous shifter, and a secondary transmission drive gear; the secondary transmission drive gear is fixedly connected to the hybrid drive intermediate shaft; the hybrid drive first driven gear and the hybrid drive second driven gear are connected to the hybrid drive intermediate shaft through the synchronous shifter; the hybrid drive first driven gear meshes with the hybrid drive first drive gear on the input shaft; the hybrid drive second driven gear meshes with the hybrid drive second drive gear on the input shaft.

[0016] Furthermore, the front drive output shaft is provided with: a secondary transmission driven gear and a spiral bevel gear main reduction drive gear; the secondary transmission driven gear is splinedly connected to the front drive output shaft and meshes with the secondary transmission drive gear on the hybrid drive intermediate shaft; the spiral bevel gear main reduction drive gear is fixedly connected to the front drive output shaft.

[0017] Furthermore, the front drive axle differential is provided with a spiral bevel gear for main reduction and driven gear, which meshes with the spiral bevel gear for main reduction and driven gear on the front drive output shaft.

[0018] Furthermore, when the first clutch is closed and the synchronous shifter is in neutral, the engine's power is transmitted sequentially through the shock absorber, input flange, first clutch, input shaft, hybrid drive second drive gear, and generator driven gear to the generator rotor shaft to drive the generator to generate electricity, which is the engine-driven generator power generation operating condition.

[0019] Furthermore, when the first clutch is open and the synchronous shifter engages with the first driven gear of the hybrid drive, the power of the generator sequentially passes through the generator rotor shaft, the generator driven gear, the second driving gear of the hybrid drive, the input shaft, the first driving gear of the hybrid drive, the first driven gear of the hybrid drive, the synchronous shifter, the hybrid drive intermediate shaft, the second-stage transmission driving gear, the second-stage transmission driven gear, the front drive output shaft, the spiral bevel gear main reduction driving gear and the spiral bevel gear main reduction driven gear front drive axle differential to drive the front wheels of the vehicle, which is the generator low-speed drive condition.

[0020] Furthermore, when the first clutch is disengaged and the synchronous shifter engages with the hybrid drive second driven gear, the generator's power sequentially passes through the generator rotor shaft, generator driven gear, hybrid drive second driving gear, hybrid drive second driven gear, synchronous shifter, hybrid drive intermediate shaft, secondary transmission driving gear, secondary transmission driven gear, front drive output shaft, spiral bevel gear main reduction driving gear, and spiral bevel gear main reduction driven gear front drive axle differential to drive the vehicle's front wheels, which is the generator's high-speed drive mode.

[0021] Furthermore, when the first clutch is closed, the synchronizer shifter engages with the hybrid drive first driven gear, and the engine power sequentially passes through the shock absorber, input flange, first clutch, input shaft, hybrid drive first driving gear, hybrid drive first driven gear, synchronizer shifter, hybrid drive intermediate shaft, secondary transmission driving gear, secondary transmission driven gear, front drive output shaft, spiral bevel gear main reducer driving gear, spiral bevel gear main reducer driven gear, and front drive axle differential to drive the front wheels of the vehicle, which is the engine low-speed drive mode.

[0022] Furthermore, when the first clutch is closed, the synchronizer shifter engages with the hybrid drive second driven gear, and the engine power sequentially passes through the shock absorber, input flange, first clutch, input shaft, hybrid drive second driving gear, hybrid drive second driven gear, synchronizer shifter, hybrid drive intermediate shaft, secondary transmission driving gear, secondary transmission driven gear, front drive output shaft, spiral bevel gear main reducer driving gear, spiral bevel gear main reducer driven gear, and front drive axle differential to drive the front wheels of the vehicle, which is the high-speed drive mode of the engine.

[0023] Embodiment 2 of this utility model addresses the technical solution adopted by a front-wheel drive single-motor hybrid transmission with a transversely mounted engine: a front-wheel drive single-motor two-speed hybrid transmission (transversely mounted engine), comprising:

[0024] Power source: Consists of an engine with shock absorbers and a generator; wherein the engine is transversely mounted;

[0025] Gear clutch transmission system: It includes an input flange and input shaft coaxial with the engine, a generator rotor shaft and a hybrid drive intermediate shaft parallel to the input shaft.

[0026] It also includes a front drive axle differential, which is arranged parallel to the input shaft and the transversely mounted engine;

[0027] The hybrid drive intermediate shaft is provided with a hybrid drive first driven gear, a hybrid drive second driven gear, a synchronous shifter, and a main reduction drive gear; the main reduction drive gear is fixedly connected to the hybrid drive intermediate shaft;

[0028] The front drive axle differential is provided with a main reducer driven gear, which meshes with a main reducer driving gear on the hybrid drive intermediate shaft;

[0029] After the power from the engine and generator is transmitted to the hybrid drive intermediate shaft, the front wheels of the vehicle are driven through the main reducer gear, the main reducer gear, and the front drive axle differential. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Figure 1 This is a schematic diagram of the structure of a front-wheel drive single-motor two-speed hybrid transmission (engine longitudinally mounted) according to Embodiment 1 of this utility model;

[0032] Figure 2 This is a schematic diagram of the structure of a front-wheel drive single-motor two-speed hybrid transmission (engine transversely mounted) according to Embodiment 1 of this utility model;

[0033] In the diagram: 1. Shock absorber; 2. Input flange; 3. Input shaft; 4. Hybrid drive first drive gear; 5. Hybrid drive second drive gear; 6. Generator driven gear; 7. Generator rotor shaft; 8. Hybrid drive intermediate shaft; 9. Hybrid drive first driven gear; 10. Hybrid drive second driven gear; 11. Secondary transmission drive gear; 12. Front drive output shaft; 13. Secondary transmission driven gear; 14. Spiral bevel gear main reducer drive gear; 15. Spiral bevel gear main reducer driven gear; 16. Front drive axle differential; 17. Main reducer drive gear; 18. Main reducer driven gear; C1. First clutch; G1. Synchronous shifter; 100. Engine; 200. Generator. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0035] Example 1: Front-wheel drive single-motor two-speed hybrid transmission (engine longitudinally mounted)

[0036] like Figure 1 The front-wheel drive single-motor two-speed hybrid transmission (engine longitudinally mounted) shown is a front-wheel drive single-motor two-speed hybrid transmission formed together with the longitudinally mounted engine on the basis that the vehicle already has a rear-wheel pure electric drive system. It can work with the rear-wheel pure electric drive system to realize the vehicle's two-speed four-wheel pure electric drive, range-extended drive and two-speed four-wheel hybrid drive.

[0037] Specifically, it includes:

[0038] Power source: Consists of an engine 100 with shock absorber 1 and a generator 200; wherein, the engine 100 is longitudinally mounted;

[0039] Gear clutch transmission system: It includes an input flange 2 and an input shaft 3 coaxially arranged with the engine 100, a generator rotor shaft 7, a hybrid drive intermediate shaft 8 and a front drive output shaft 12 arranged parallel to the input shaft 3;

[0040] It also includes a front drive axle differential 16, which is located below the longitudinally mounted engine 100 and is positioned perpendicular to the longitudinally mounted engine 100.

[0041] In this embodiment, the input flange 2 is splinedly connected to the shock absorber 1 on the engine 100; the input shaft 3 is connected to the input flange 2 via the first clutch C1, and the input shaft 3 is provided with a hybrid drive first drive gear 4 and a hybrid drive second drive gear 5, which are fixed or splinedly connected to the input shaft 3.

[0042] In this embodiment, a driven gear 6 is provided on the generator rotor shaft 7. The driven gear 6 is fixed or splined to the generator rotor shaft 7. The driven gear 6 meshes with the hybrid drive second driving gear 5 on the input shaft 3.

[0043] In this embodiment, the hybrid drive intermediate shaft 8 is equipped with: a hybrid drive first driven gear 9, a hybrid drive second driven gear 10, a synchronous shifter G1, and a secondary transmission drive gear 11. The secondary transmission drive gear 11 is fixedly connected to the hybrid drive intermediate shaft 8; the hybrid drive first driven gear 9 and the hybrid drive second driven gear 10 are connected to the hybrid drive intermediate shaft 8 via the synchronous shifter G1; the hybrid drive first driven gear 9 meshes with the hybrid drive first drive gear 4 on the input shaft 3. The hybrid drive second driven gear 10 meshes with the hybrid drive second drive gear 5 on the input shaft 3.

[0044] In this embodiment, the front drive output shaft 12 is provided with a secondary transmission driven gear 13 and a spiral bevel gear main reduction drive gear 14; the secondary transmission driven gear 13 is splined connected to the front drive output shaft 12 and meshes with the secondary transmission drive gear 11 on the hybrid drive intermediate shaft 8; the spiral bevel gear main reduction drive gear 14 is fixedly connected to the front drive output shaft 12.

[0045] In this embodiment, a spiral bevel gear main reducer driven gear 15 is provided on the front drive axle differential 16, and the spiral bevel gear main reducer driven gear 15 meshes with the spiral bevel gear main reducer drive gear 14 on the front drive output shaft 12.

[0046] In this embodiment, when the first clutch C1 is closed and the synchronous shifter G1 is in neutral, the power of the engine 100 is transmitted sequentially through the shock absorber 1, input flange 2, first clutch C1, input shaft 3, hybrid drive second driving gear 5, and generator driven gear 6 to the generator rotor shaft 7, driving the generator 200 to generate electricity, which is the engine-driven generator power generation operation mode.

[0047] In this embodiment, when the first clutch C1 is open and the synchronous shifter G1 is engaged with the hybrid drive first driven gear 9, the power of the generator 200 sequentially passes through the generator rotor shaft 7, generator driven gear 6, hybrid drive second driving gear 5, input shaft 3, hybrid drive first driving gear 4, hybrid drive first driven gear 9, synchronous shifter G1, hybrid drive intermediate shaft 8, secondary transmission driving gear 11, secondary transmission driven gear 13, front drive output shaft 12, spiral bevel gear main reduction driving gear 14 and spiral bevel gear main reduction driven gear 15, and front drive axle differential 16, driving the front wheels of the vehicle, which is the generator low-speed drive mode.

[0048] In this embodiment, the first clutch C1 is open, the synchronous shifter G1 is engaged with the hybrid drive second driven gear 10, and the power of the generator 200 is sequentially transmitted through the generator rotor shaft 7, generator driven gear 6, hybrid drive second driving gear 5, hybrid drive second driven gear 10, synchronous shifter G1, hybrid drive intermediate shaft 8, secondary transmission driving gear 11, secondary transmission driven gear 13, front drive output shaft 12, spiral bevel gear main reduction driving gear 14 and spiral bevel gear main reduction driven gear 15, and front drive axle differential 16 to drive the front wheels of the vehicle, which is the high-speed drive mode of the generator.

[0049] In this embodiment, the first clutch C1 is closed, the synchronous shifter G1 engages with the hybrid drive first driven gear 9, and the power from the engine 100 sequentially passes through the shock absorber 1, input flange 2, first clutch C1, input shaft 3, hybrid drive first driving gear 4, hybrid drive first driven gear 9, synchronous shifter G1, hybrid drive intermediate shaft 8, secondary transmission driving gear 11, secondary transmission driven gear 13, front drive output shaft 12, spiral bevel gear main reducer driving gear 14, spiral bevel gear main reducer driven gear 15, and front drive axle differential 16, driving the front wheels of the vehicle; this is the low-speed drive mode of the engine.

[0050] In this embodiment, the first clutch C1 is closed, the synchronous shifter G1 engages with the hybrid drive second driven gear 10, and the power from the engine 100 sequentially passes through the shock absorber 1, input flange 2, first clutch C1, input shaft 3, hybrid drive second driving gear 5, hybrid drive second driven gear 10, synchronous shifter G1, hybrid drive intermediate shaft 8, secondary transmission driving gear 11, secondary transmission driven gear 13, front drive output shaft 12, spiral bevel gear main reduction driving gear 14, spiral bevel gear main reduction driven gear 15, and front drive axle differential 16, driving the front wheels of the vehicle; this is the high-speed drive mode of the engine.

[0051] The operating mode of a front-wheel drive single-motor two-speed hybrid transmission in this embodiment is as follows:

[0052] Parking power generation: When the vehicle is stationary, the first clutch C1 is closed and the synchronous shifter G1 is in the neutral position; after starting the engine 100 with the power of the generator 200, the power of the engine 100 is transmitted through the shock absorber 1, input flange 2, first clutch C1, input shaft 3, hybrid drive second drive gear 5, generator driven gear 6, generator rotor shaft 7, and drives the generator 200 to generate electricity and charge the vehicle battery pack.

[0053] Range-extended drive: When the vehicle is in motion, the vehicle's drive is entirely provided by the rear-wheel pure electric drive system. At this time, the working state of this embodiment is basically the same as that of parking generator. The difference is that the power generated by the generator can be directly used for the rear-wheel pure electric drive system, and the surplus power can be used to charge the vehicle battery pack. When the vehicle needs a larger driving power, it can also work with the vehicle battery pack to provide power for the rear-wheel pure electric drive system.

[0054] Generator low-speed drive: Under conditions of low to medium vehicle speed and a high battery charge, the first clutch C1 opens, and the synchronizer shifter G1 engages with the first driven gear 9 of the hybrid drive. The power from the generator 200 drives the vehicle through the generator rotor shaft 7, generator driven gear 6, second driving gear 5 of the hybrid drive, input shaft 3, first driving gear 4 of the hybrid drive, first driven gear 9 of the hybrid drive, synchronizer shifter G1, intermediate shaft 8 of the hybrid drive, second-stage transmission driving gear 11, second-stage transmission driven gear 13, front drive output shaft 12, spiral bevel gear main reduction driving gear 14, spiral bevel gear main reduction driven gear 15, and front drive axle differential 16. The power used by the generator 200 is derived from the vehicle's battery pack. Combined with the rear-wheel pure electric drive system, this achieves low-speed four-wheel pure electric drive in low to medium gear conditions.

[0055] High-speed generator drive: Under medium-to-high vehicle speeds and with a high battery charge, the first clutch C1 opens, and the synchronizer shifter G1 engages with the hybrid drive second driven gear 10. Power from the generator 200 is transmitted through the generator rotor shaft 7, generator driven gear 6, hybrid drive second driving gear 5, hybrid drive second driven gear 10, synchronizer shifter G1, hybrid drive intermediate shaft 8, secondary transmission driving gear 11, secondary transmission driven gear 13, front drive output shaft 12, spiral bevel gear main reduction driving gear 14, spiral bevel gear main reduction driven gear 15, and front drive axle differential 16 to drive the vehicle. The generator 200 uses electricity from the vehicle's battery pack. Combined with the rear-wheel pure electric drive system, this achieves high-speed four-wheel pure electric drive in medium-to-high-speed gears.

[0056] Engine low-gear drive: Under the premise that the vehicle is traveling at low to medium speeds and has efficient engine low-gear drive capability, the first clutch C1 is closed, the synchronizer shifter G1 engages with the hybrid drive first driven gear 9, and the power from the engine 100 drives the vehicle through the shock absorber 1, input flange 2, first clutch C1, input shaft 3, hybrid drive first driving gear 4, hybrid drive first driven gear 9, synchronizer shifter G1, hybrid drive intermediate shaft 8, secondary transmission driving gear 11, secondary transmission driven gear 13, front drive output shaft 12, spiral bevel gear main reducer driving gear 14, spiral bevel gear main reducer driven gear 15, and front drive axle differential 16. This is the engine low-gear drive mode, which, in conjunction with the rear-wheel pure electric drive system, achieves low-gear four-wheel hybrid drive for the vehicle.

[0057] Engine High-Gear Drive: Under the premise that the vehicle is traveling at medium to high speeds and the engine has high-efficiency high-gear drive capability, the first clutch C1 is closed, and the synchronous shifter G1 engages with the hybrid drive second driven gear 10. The power from the engine 100 drives the vehicle through the shock absorber 1, input flange 2, first clutch C1, input shaft 3, hybrid drive second driving gear 5, hybrid drive second driven gear 10, synchronous shifter G1, hybrid drive intermediate shaft 8, secondary transmission driving gear 11, secondary transmission driven gear 13, front drive output shaft 12, spiral bevel gear main reduction driving gear 14, spiral bevel gear main reduction driven gear 15, and front drive axle differential 16. This is the engine high-gear drive mode, which, in conjunction with the rear-wheel pure electric drive system, achieves high-gear four-wheel hybrid drive for the vehicle.

[0058] When the engine is driven in low and high gears, the generator / drive motor can idle, or be in generator or drive mode, depending on the vehicle's driving needs and engine operating conditions. This allows the longitudinally mounted engine 100 to always work in a higher efficiency range, improving vehicle performance while reducing fuel consumption.

[0059] The transition from range-extended drive mode to engine low-speed or high-speed drive mode depends on the vehicle's speed. When the vehicle speed reaches the efficient drive range of engine low-speed or high-speed mode, the engine speed of 100 is adjusted to be close to the suitable engine low-speed or high-speed drive speed. Then, the synchronizer shifter G1 is engaged with the first driven gear 9 of the hybrid drive to execute engine low-speed drive, or the synchronizer shifter G1 is engaged with the second driven gear 10 of the hybrid drive to execute engine high-speed drive.

[0060] The control process for transitioning from generator low-speed or high-speed drive mode to engine low-speed or high-speed drive mode is more complex. A hydraulic clutch can directly engage the first clutch C1, using the vehicle's driving force to start the engine 100 and enter engine low-speed or high-speed drive mode. However, an electromagnetic clutch cannot directly engage engine drive mode. It requires first transferring vehicle driving control to the rear-wheel electric drive system, placing the synchronizer G1 in neutral, and simultaneously controlling the generator 200 to reduce its speed to near zero. Then, the first clutch C1 is engaged, and the generator 200 starts the engine 100, driving the generator to generate electricity and entering range-extended drive mode. Subsequent control methods are the same as transitioning from range-extended drive mode to engine low-speed or high-speed drive mode.

[0061] The switching of high and low speed gears of the generator and the engine requires first handing over the driving power of the vehicle to the rear wheel pure electric drive system and reducing the working torque of the first driven gear 9 or the second driven gear (10) of the hybrid drive to near zero. Then, the synchronous shifter G1 is switched from the geared state to the intermediate neutral state, and then from the neutral state to the target gear. Finally, the switching of high and low speed gears is completed by adjusting the generating torque of the generator 200 and the driving torque of the rear wheel pure electric drive system.

[0062] Vehicle start-up: In situations where the vehicle is starting slowly or the power requirement is not high, the rear-wheel pure electric drive system performs the pure electric drive function. In this embodiment, it does not participate in the operation, and the power required by the rear-wheel pure electric drive system comes from the vehicle's battery pack. When a larger starting torque is required, and the vehicle's battery pack has sufficient charge, this embodiment can drive the front wheels of the vehicle in a low-speed mode using a generator, achieving four-wheel pure electric drive start-up.

[0063] Engine start-stop: The start and stop of the engine 200 in parking power generation or vehicle driving state requires the synchronous shifter G1 on the hybrid drive intermediate shaft 8 to be in the intermediate neutral position, the first clutch C1 to be closed, and the generator 200 to drive and control the start and stop of the engine 100.

[0064] When the vehicle is parked, the engine starts and stops with the synchronizer G1 in neutral, the first clutch C1 engaged, and the generator 200 drives and controls the engine 100 to start and stop. When the vehicle is in motion, the hydraulic clutch only needs to engage the first clutch C1 to start the engine using the vehicle's driving power. The electromagnetic clutch needs to transfer the vehicle's driving power to the rear-wheel pure electric drive system, and the synchronizer G1 needs to be in neutral to reduce the speed of the generator 200 to near zero. Then, the first clutch C1 is engaged, and the generator 200 is used to start the engine 100. When the vehicle speed is too low to operate in low-speed gears, the engine needs to be stopped. The fuel supply to the engine 100 can be stopped and the first clutch C1 can be disengaged, allowing the engine to stop automatically.

[0065] Reversing: The vehicle reverses via the reverse drive motor of the rear wheel pure electric drive system. If necessary, in this embodiment, the reverse drive can be initiated by the generator in low gear.

[0066] Regenerative braking: Regenerative braking during vehicle operation is achieved by the drive motor of the rear-wheel pure electric drive system switching to a generator state. In this embodiment, the generator 200 can also participate in regenerative braking under both generator-driven and engine-driven two-speed conditions.

[0067] Example 2: Front-wheel drive single-motor two-speed hybrid transmission (engine transversely mounted)

[0068] like Figure 2 The front-wheel drive single-motor two-speed hybrid transmission (with transverse engine) shown is a front-wheel drive single-motor two-speed hybrid transmission that is formed together with the transverse engine on the basis that the vehicle already has a rear-wheel pure electric drive system. It can work with the rear-wheel pure electric drive system to realize two-speed four-wheel pure electric drive, range-extended drive and two-speed four-wheel hybrid drive of the whole vehicle.

[0069] Specifically, it includes:

[0070] Power source: Consists of an engine 100 with shock absorber 1 and a generator 200; wherein, the engine 100 is horizontally mounted;

[0071] The gear clutch transmission system includes an input flange 2 and an input shaft 3 coaxially mounted with the engine 100, a generator rotor shaft 7 and a hybrid drive intermediate shaft 8 parallel to the input shaft 3.

[0072] It also includes a front drive axle differential 16, which is arranged parallel to the input shaft 3 and the transversely mounted engine 100.

[0073] The hybrid drive intermediate shaft 8 is provided with a hybrid drive first driven gear 9, a hybrid drive second driven gear 10, a synchronous shifter G1, and a main reduction drive gear 17; the main reduction drive gear 17 is fixedly connected to the hybrid drive intermediate shaft 8.

[0074] The front drive axle differential 16 is provided with a main reduction driven gear 18, which meshes with the main reduction drive gear 17 on the hybrid drive intermediate shaft 8.

[0075] After the power from the engine 100 and generator 200 is transmitted to the hybrid drive intermediate shaft 8, the front wheels of the vehicle are driven by the main reducer drive gear 17, the main reducer driven gear 18, and the front drive axle differential 16.

[0076] The functions and control methods of Example 2 are completely consistent with those of Example 1.

[0077] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A front-wheel drive single-motor two-speed hybrid transmission, characterized in that, include: Power source: consisting of an engine (100) with a shock absorber (1) and a generator (200); wherein the engine (100) is longitudinally mounted; Gear clutch transmission system: It includes an input flange (2) and an input shaft (3) coaxially arranged with the engine (100), a generator rotor shaft (7), a hybrid drive intermediate shaft (8) and a front drive output shaft (12) arranged parallel to the input shaft (3); It also includes a front drive axle differential (16), which is located below the longitudinally mounted engine (100) and is positioned perpendicular to the longitudinally mounted engine (100).

2. The front-wheel drive single-motor two-range hybrid transmission according to claim 1, characterized by, The input flange (2) is splined to the shock absorber (1) on the engine (100); the input shaft (3) is connected to the input flange (2) via a first clutch (C1); the input shaft (3) is provided with a hybrid drive first drive gear (4) and a hybrid drive second drive gear (5); the hybrid drive first drive gear (4) and the hybrid drive second drive gear (5) are fixed or splined to the input shaft (3).

3. The front-wheel drive single-motor two-range hybrid transmission according to claim 2, characterized by, A driven gear (6) is provided on the generator rotor shaft (7). The driven gear (6) is fixed or splined to the generator rotor shaft (7). The driven gear (6) meshes with the hybrid drive second driving gear (5) on the input shaft (3).

4. The front-wheel drive single-motor two-range hybrid transmission according to claim 2, characterized by, The hybrid drive intermediate shaft (8) is provided with: a hybrid drive first driven gear (9), a hybrid drive second driven gear (10), a synchronous shifter (G1) and a secondary transmission drive gear (11). The secondary transmission drive gear (11) is fixedly connected to the hybrid drive intermediate shaft (8). The hybrid drive first driven gear (9) and the hybrid drive second driven gear (10) are connected to the hybrid drive intermediate shaft (8) through the synchronous shifter (G1). The hybrid drive first driven gear (9) meshes with the hybrid drive first drive gear (4) on the input shaft (3), and the hybrid drive second driven gear (10) meshes with the hybrid drive second drive gear (5) on the input shaft (3).

5. The front-wheel drive single-motor two-range hybrid transmission according to claim 4, characterized by The front drive output shaft (12) is provided with a secondary transmission driven gear (13) and a spiral bevel gear main reduction drive gear (14); the secondary transmission driven gear (13) is splinedly connected to the front drive output shaft (12) and meshes with the secondary transmission drive gear (11) on the hybrid drive intermediate shaft (8); the spiral bevel gear main reduction drive gear (14) is fixedly connected to the front drive output shaft (12).

6. The front-wheel drive single-motor two-range hybrid transmission according to claim 5, characterized by The front drive axle differential (16) is provided with a spiral bevel gear main reducer driven gear (15), which meshes with the spiral bevel gear main reducer drive gear (14) on the front drive output shaft (12).

7. The front-wheel drive single-motor two-range hybrid transmission according to claim 4, characterized by When the first clutch (C1) is closed and the synchronous shifter (G1) is in neutral, the power of the engine (100) is transmitted sequentially through the shock absorber (1), the input flange (2), the first clutch (C1), the input shaft (3), the hybrid drive second drive gear (5), and the generator driven gear (6) to the generator rotor shaft (7) to drive the generator (200) to generate electricity.

8. The front-wheel drive single-motor two-range hybrid transmission according to claim 6, characterized by, When the first clutch (C1) is open and the synchronous shifter (G1) is engaged with the hybrid drive first driven gear (9), the power of the generator (200) passes sequentially through the generator rotor shaft (7), generator driven gear (6), hybrid drive second drive gear (5), input shaft (3), hybrid drive first drive gear (4), hybrid drive first driven gear (9), synchronous shifter (G1), hybrid drive intermediate shaft (8), secondary transmission drive gear (11), secondary transmission driven gear (13), front drive output shaft (12), spiral bevel gear main reduction drive gear (14) and spiral bevel gear main reduction driven gear (15) front drive axle differential (16) to drive the front wheels of the vehicle.

9. The front-wheel drive single-motor two-range hybrid transmission of claim 6, wherein, The first clutch (C1) is open, the synchronous shifter (G1) is engaged with the hybrid drive second driven gear (10), and the power of the generator (200) is sequentially transmitted through the generator rotor shaft (7), generator driven gear (6), hybrid drive second driving gear (5), hybrid drive second driven gear (10), synchronous shifter (G1), hybrid drive intermediate shaft (8), secondary transmission driving gear (11), secondary transmission driven gear (13), front drive output shaft (12), spiral bevel gear main reduction driving gear (14) and spiral bevel gear main reduction driven gear (15) front drive axle differential (16) to drive the front wheels of the vehicle.

10. The front-wheel drive single-motor two-range hybrid transmission of claim 6, wherein, When the first clutch (C1) is closed, the synchronous shifter (G1) engages with the hybrid drive first driven gear (9), and the power of the engine (100) passes sequentially through the shock absorber (1), input flange (2), first clutch (C1), input shaft (3), hybrid drive first driving gear (4), hybrid drive first driven gear (9), synchronous shifter (G1), hybrid drive intermediate shaft (8), secondary transmission driving gear (11), secondary transmission driven gear (13), front drive output shaft (12), spiral bevel gear main reduction driving gear (14), spiral bevel gear main reduction driven gear (15), and front drive axle differential (16) to drive the front wheels of the vehicle.

11. The front-wheel drive single-motor two-speed hybrid transmission according to claim 6, characterized in that, When the first clutch (C1) is closed, the synchronous shifter (G1) engages with the hybrid drive second driven gear (10), and the power of the engine (100) passes sequentially through the shock absorber (1), input flange (2), first clutch (C1), input shaft (3), hybrid drive second driving gear (5), hybrid drive second driven gear (10), synchronous shifter (G1), hybrid drive intermediate shaft (8), secondary transmission driving gear (11), secondary transmission driven gear (13), front drive output shaft (12), spiral bevel gear main reduction driving gear (14), spiral bevel gear main reduction driven gear (15), and front drive axle differential (16) to drive the front wheels of the vehicle.

12. A front wheel drive single motor two range hybrid transmission characterized by, include: Power source: consisting of an engine (100) with a shock absorber (1) and a generator (200); wherein the engine (100) is horizontally mounted; Gear clutch transmission system: It includes an input flange (2) and an input shaft (3) coaxially arranged with the engine (100), a generator rotor shaft (7) and a hybrid drive intermediate shaft (8) arranged parallel to the input shaft (3). It also includes a front drive axle differential (16), which is arranged parallel to the input shaft (3) and the transversely mounted engine (100); The hybrid drive intermediate shaft (8) is provided with a hybrid drive first driven gear (9), a hybrid drive second driven gear (10), a synchronous shifter (G1) and a main reduction drive gear (17); the main reduction drive gear (17) is fixedly connected to the hybrid drive intermediate shaft (8); The front drive axle differential (16) is provided with a main reducer driven gear (18), which meshes with the main reducer drive gear (17) on the hybrid drive intermediate shaft (8); After the power from the engine (100) and generator (200) is transmitted to the hybrid drive intermediate shaft (8), the front wheels of the vehicle are driven by the main reducer drive gear (17), the main reducer driven gear (18), and the front drive axle differential (16).

Images