Hybrid driving device

Abstract

The utility model provides a hybrid driving device, which belongs to driving devices and comprises an engine, a wet clutch, a single motor, a planet row assembly, a main speed reducer assembly and a dual-mass flywheel, and an output shaft of the engine is connected with an input shaft of the wet clutch through the dual-mass flywheel. An output shaft of the wet clutch is connected with an input shaft of the planet row assembly, an output shaft of the planet row assembly is connected with an input shaft of the main speed reducer assembly, and an output shaft of the main speed reducer assembly is connected with tires. And an output shaft of the single motor is in transmission connection with an input shaft of the planet row assembly. The single motor is arranged between the planet row assembly and the engine, and a set of wet clutch (replacing two sets of locking devices) is adopted, so that the axial size of the hybrid power box is greatly shortened, and a front cabin of the passenger car can be conveniently and transversely arranged; due to the adoption of the wet clutch, the loss of a hydraulic system is lower, the driving of a single motor is more efficient, and the transmission efficiency is improved.

Description

Technical Field

[0001] This utility model pertains to drive devices, and particularly relates to a hybrid drive device. Background Technology

[0002] Nowadays, due to increased environmental awareness and high fuel prices, electric vehicles are favored by many users. However, for long-distance driving or in low-temperature areas, there are issues with battery life and low battery efficiency, which seriously affect the user experience. Therefore, hybrid vehicles are the best choice for some users. Hybrid vehicles have both an electric motor and an engine. The electric motor works to reduce fuel consumption at low speeds and in congested traffic, and it also recovers energy when the vehicle brakes. In long-distance driving or in colder areas, the engine's intervention allows the car to travel further.

[0003] However, the connection point between the motor and engine in hybrid vehicles is crucial for energy recovery. Existing technology involves a single motor located at the rear of the planetary gear set with two sets of locking devices. This structure is complex and has too much axial space, which is not conducive to the transverse layout of front-wheel drive passenger cars. Therefore, a motor arrangement scheme that is compact, simple in structure, and highly efficient is needed. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a hybrid drive device, comprising an engine, a wet clutch, a single motor, a planetary gear set assembly, a main reducer assembly, and a dual-mass flywheel. The output shaft of the engine is connected to the input shaft of the wet clutch via the dual-mass flywheel. The output shaft of the wet clutch is connected to the input shaft of the planetary gear set assembly. The output shaft of the planetary gear set assembly is connected to the input shaft of the main reducer assembly. The output shaft of the main reducer assembly is connected to the tires. The output shaft of the single motor is drive-connected to the input shaft of the planetary gear set assembly.

[0005] Furthermore, the hybrid drive unit also includes a motor controller, which is electrically connected to the single motor.

[0006] Furthermore, the motor controller is connected to the single motor via a three-phase line and a communication harness.

[0007] Furthermore, both the wet clutch and the planetary gear assembly are electrically connected to the motor controller.

[0008] Furthermore, the motor controller integrates a TCU.

[0009] Furthermore, the planetary gear assembly includes a sun gear, a planet carrier, an internal gear ring, and planet gears. A plurality of the planet gears are rotatably mounted on a first shaft of the planet carrier. The sun gear is drive-connected to the output shaft of the wet clutch. The sun gear is rotatably mounted on a second shaft of the planet carrier and is located between the planet gears. The sun gear meshes with all of the planet gears. The internal gear ring is mounted outside the planet gears and meshes with all of them. The internal gear ring is connected to the input shaft of the main reducer assembly via an output shaft.

[0010] Furthermore, the planetary gears are three in number.

[0011] Furthermore, the hybrid drive unit also includes a housing accessory mounted on the outer surface of the single motor and planetary gear assembly.

[0012] Furthermore, the hybrid drive unit also includes a battery, which is electrically connected to a single motor.

[0013] Furthermore, the engine is a hybrid-specific engine, DHE.

[0014] The beneficial effects of this utility model are:

[0015] 1. The hybrid drive device of this utility model includes a wet clutch. The input shaft of the wet clutch is connected to the output shaft of the engine through a dual-mass flywheel. The output shaft of the wet clutch is connected to the input shaft of the planetary gear assembly. The output shaft of the single motor is driven by the input shaft of the planetary gear assembly. By arranging the single motor between the planetary gear assembly and the engine and using a single wet clutch (replacing two sets of locks), the axial dimension of the hybrid gearbox is greatly shortened, which is convenient for transverse arrangement in the front compartment of passenger cars. Due to the use of a single wet clutch, the hydraulic system loss is lower, the single motor drive is more efficient, and the transmission efficiency is improved.

[0016] 2. This utility model improves the transmission efficiency of the hybrid transmission assembly by using an innovative structural design of a single motor + planetary gearbox assembly, thus solving the problem of low transmission efficiency in hybrid drive systems of new energy passenger vehicles.

[0017] 3. This utility model also includes a motor controller, which is electrically connected to the single motor. The motor controller is used to control the single motor and the engine to switch between working or work simultaneously, thereby realizing different working modes and adapting to different driving environments.

[0018] 4. The wet clutch and planetary gear assembly of this utility model are both electrically connected to the motor controller. The motor controller controls the engagement and disengagement of the wet clutch, thereby controlling whether power is transmitted to the planetary gear assembly, thus improving working efficiency. The motor controller monitors the status of the planetary gear assembly to determine whether the planetary gear assembly needs to drive a single motor to generate electricity.

[0019] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the hybrid drive device in an embodiment of this utility model is shown.

[0022] Figure 2 A schematic diagram showing the positions of the single-motor hybrid gearbox and engine in the hybrid drive device of this utility model embodiment is shown.

[0023] Figure 3 A schematic diagram of the planetary gear assembly of the single hybrid drive device in an embodiment of this utility model is shown.

[0024] In the diagram, 1. Engine; 2. Wet clutch; 3. Single motor; 4. Motor controller; 5. Planetary gear assembly; 51. Sun gear; 52. Planetary carrier; 53. Internal gear ring; 54. Planetary gears; 6. Main reducer assembly; 7. Dual-mass flywheel. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] refer to Figure 1 , Figure 1A schematic diagram of the hybrid drive device in an embodiment of this utility model is shown. A hybrid drive device includes an engine 1, a wet clutch 2, a single motor 3, a planetary gear set 5, a main reducer assembly 6, and a dual-mass flywheel 7. The output shaft of the engine 1 is connected to the input shaft of the wet clutch 2, the output shaft of the wet clutch 2 is connected to the input shaft of the planetary gear set 5, the output shaft of the planetary gear set 5 is connected to the input shaft of the main reducer assembly 6, and the output shaft of the main reducer assembly 6 is connected to the tires. The output shaft of the single motor 3 is drively connected to the input shaft of the planetary gear set 5.

[0027] This utility model patent simplifies the existing technical solution by arranging a single motor 3 between the planetary gear assembly 5 and the engine 1 and using a set of wet clutches 2 (replacing two sets of lock-up devices), which greatly shortens the axial dimension of the hybrid gearbox and facilitates transverse arrangement in the front compartment of passenger vehicles. Due to the use of a set of wet clutches 2, hydraulic system losses are low, the single motor 3 drive is more efficient and direct, and there is no power interruption; the motor power loss is small, greatly improving the transmission efficiency of the hybrid gearbox assembly.

[0028] This patented technical solution mainly addresses the problem of low transmission efficiency in hybrid transmissions for new energy passenger vehicles. Through an innovative structural design of a single motor 3 + planetary gear set 5, it improves the transmission efficiency of the hybrid transmission assembly, solves the current problems of power depletion and high fuel consumption in new energy vehicles, enhances vehicle driving comfort, and saves energy and reduces emissions.

[0029] The wet clutch 2 controls the engagement and disengagement of the clutch internally through hydraulic control, thereby controlling whether the power of the engine 1 participates in driving. When the wet clutch 2 is engaged by hydraulic control, the engine 1 drives the wet clutch 2 through the dual-mass flywheel 7, which in turn drives the planetary gear assembly 5 to rotate, thus driving the vehicle. When the wet clutch 2 is disengaged by hydraulic control, the engine 1 does not participate in driving, and the motor controller 4 controls the single motor 3 to drive the vehicle.

[0030] refer to Figure 2 , Figure 2 The present invention relates to an engine 1 and a single-motor hybrid transmission. The single-motor hybrid transmission includes a wet clutch 2, a single motor 3, a motor controller 4, a planetary gearbox assembly 5, a main reducer assembly 6, and a dual-mass flywheel 7.

[0031] Based on the existing parallel shaft gear set structure hybrid transmission design, through internal structure optimization, an innovative structural design of single motor 3 + planetary gear set 5 is adopted to improve the transmission efficiency of the hybrid transmission assembly, solve the current problems of power depletion and high fuel consumption in new energy vehicles, improve vehicle driving comfort and save energy and reduce emissions.

[0032] In the above embodiments, another optional implementation is a hybrid drive device, including an engine 1, the output shaft of the engine 1 and the input shaft of the wet clutch 2 are connected through a dual-mass flywheel 7, the output shaft of the wet clutch 2 is connected to the input shaft of the planetary gear assembly 5 through a coupling, the output shaft of the planetary gear assembly 5 is connected to the input shaft of the main reducer assembly 6 through a coupling, and the output shaft of the main reducer assembly 6 is connected to a tire; the output shaft of the single motor 3 is connected to the input shaft of the planetary gear assembly 5 through a coupling.

[0033] This invention reduces vibration and noise by setting a dual-mass flywheel 7. When the engine 1 is running, it will generate periodic vibrations (especially at low speeds or under high loads). The dual-mass flywheel 7 absorbs and buffers these vibrations through internal elastic elements (such as springs or rubber damping devices), preventing the vibrations from being directly transmitted to the planetary gear assembly 5, thereby reducing in-vehicle noise and improving ride comfort.

[0034] Furthermore, the hybrid drive unit also includes a motor controller 4, which is electrically connected to the single motor 3.

[0035] The motor controller 4 is used to control the single motor 3 and the engine 1 to switch or work simultaneously, and at the same time monitors the status of the wet clutch and planetary gear assembly 5, thereby improving the overall working status and efficiency of this utility model.

[0036] In this embodiment of the invention, the single motor 3 and the motor controller 4 are connected via three-phase wires and a communication harness. Specifically, the single motor 3 is directly connected to the planetary gear assembly 5, and can be used for driving the vehicle and for reclamation of coasting energy, idling, and power generation during driving.

[0037] Furthermore, both the wet clutch 2 and the planetary gear set 5 are electrically connected to the motor controller 4. This enables the motor controller 4 to control the engagement and disengagement of the wet clutch 2, thereby controlling whether power is transmitted to the planetary gear set 5, thus improving working efficiency. By monitoring the status of the planetary gear set 5, the motor controller 4 can determine whether the planetary gear set 5 needs to drive the single motor 3 to generate electricity.

[0038] In the above embodiments, another optional implementation is that the motor controller 4 integrates a TCU (Transmission Control Unit). The motor controller 4 is an MCU (Micro Control Unit), which integrates the TCU (Transmission Control Unit) control function and is connected to the single motor 3 via a three-phase line and a communication harness for monitoring and controlling the single motor 3.

[0039] refer to Figure 3 The planetary gear set 5 includes a sun gear 51, a planet carrier 52, an internal gear ring 53, and planet gears 54. Several planet gears 54 are rotatably mounted on the first shaft (eccentric shaft) of the planet carrier 52. The sun gear 51 is connected to the output shaft of the wet clutch 2. The sun gear 51 is rotatably mounted on the second shaft (central shaft) of the planet carrier 52, and is located between the planet gears 54. The sun gear 51 meshes with all the planet gears 54. The internal gear ring 53 is mounted on the outside of the planet gears 54 and meshes with all the planet gears 54. The internal gear ring 53 is connected to the input shaft of the main reducer assembly 6 via the output shaft. Specifically, the planetary gear set 5 transmits power from the engine 1 and the single motor 3, and then transmits it to the tires via the main reducer assembly 6 to drive the vehicle.

[0040] Furthermore, there are three planetary gears 54. Specifically, the three planetary gears 54 are arranged in an equilateral triangle, which improves the meshing degree between the planetary gears 54 and the internal gear ring 53 and the sun gear 51.

[0041] In one alternative embodiment described above, the hybrid drive device further includes a housing accessory mounted on the outer surface of the single motor 3 and the planetary gear assembly 5. Specifically, the housing accessory is used to secure and protect the single motor 3 and the planetary gear assembly 5.

[0042] Furthermore, it also includes a battery, which is electrically connected to the single motor 3. Specifically, the battery is a secondary battery, used to store the electricity generated by the single motor 3 and provide power to drive the single motor 3 to work, thereby driving the planetary gear assembly 5, the main reducer assembly 6, and ultimately the tires to drive the vehicle.

[0043] Engine 1 is a dedicated hybrid engine (DHE). It utilizes advanced technologies such as turbocharging, direct injection, and Miller cycle to efficiently output power.

[0044] The specific working process of this novel hybrid drive device is as follows:

[0045] 1. Pure electric drive mode: When the battery is fully charged (e.g., the battery SOC (State of Charge) is higher than 50%), the single motor 3 starts, and the power is output through the planetary gear assembly 5 and the main reducer assembly 6 to drive the wheels.

[0046] 2. Parallel drive mode of engine 1 and single motor 3: When engine 1 starts, wet clutch 2 engages, and single motor 3 works at the same time. The power of engine 1 and single motor 3 is simultaneously output to the wheels to drive the vehicle through planetary gear assembly 5 and main reducer assembly 6.

[0047] 3. Engine 1 direct drive mode: Engine 1 starts and wet clutch 2 is engaged. Engine 1 power is output to the wheels through planetary gear assembly 5 and main reducer assembly 6 to drive the vehicle.

[0048] 4. Parking power generation mode: When the vehicle is in P gear parking mode, engine 1 is working, wet clutch 2 is engaged, and the power of engine 1 drives single motor 3 through planetary gear assembly 5 to charge the power battery.

[0049] 5. Energy recovery mode: When the vehicle is coasting or braking, the vehicle generates electricity through the planetary gear assembly 5 driven by the wheels, which in turn drives the single motor 3 to replenish the power battery.

[0050] Hybrid drive system drive mode diagram:

[0051]

[0052] The table above shows HEV (Hybrid Electric Vehicle).

[0053] The advantages of this utility model are: it simplifies the internal structure based on the existing hybrid dedicated transmission, and innovatively adopts a planetary gearbox structure, which improves the transmission efficiency of the hybrid gearbox without reducing the hybrid driving mode, solves the problems of vehicle power loss and high fuel consumption, and enhances the driving comfort of customers.

[0054] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hybrid drive device characterized by comprising: The hybrid drive device comprises an engine (1), a wet clutch (2), a single motor (3), a planetary gear assembly (5), a main reducer assembly (6) and a dual mass flywheel (7), the output shaft of the engine (1) is connected with the input shaft of the wet clutch (2) through the dual mass flywheel (7), the output shaft of the wet clutch (2) is connected with the input shaft of the planetary gear assembly (5), the output shaft of the planetary gear assembly (5) is connected with the input shaft of the main reducer assembly (6), the output shaft of the main reducer assembly (6) is connected with a tire, and the output shaft of the single motor (3) is drivingly connected with the input shaft of the planetary gear assembly (5).

2. The hybrid drive device according to claim 1, characterized by The hybrid drive device further comprises a motor controller (4) which is electrically connected with the single motor (3).

3. The hybrid drive device according to claim 2, characterized by The motor controller (4) is connected with the single motor (3) through three-phase wires and a communication wire harness.

4. The hybrid drive device according to claim 2, characterized by The wet clutch (2) and the planetary gear assembly (5) are electrically connected with the motor controller (4).

5. The hybrid drive device according to any one of claims 2 to 4, characterized by, The motor controller (4) is integrated with a TCU.

6. The hybrid drive device according to claim 1, characterized by The planetary gear assembly (5) comprises a sun gear (51), a planet carrier (52), an inner ring gear (53) and a plurality of planet gears (54), the plurality of planet gears (54) are rotatably installed on a first shaft of the planet carrier (52), the sun gear (51) is drivingly connected with the output shaft of the wet clutch (2), the sun gear (51) is rotatably installed on a second shaft of the planet carrier (52) and is located between the plurality of planet gears (54), the sun gear (51) is engaged with the plurality of planet gears (54), the inner ring gear (53) is installed on the outer side of the plurality of planet gears (54) and is engaged with the plurality of planet gears (54), and the inner ring gear (53) is connected with the input shaft of the main reducer assembly (6) through an output shaft.

7. The hybrid drive device according to claim 6, characterized by The planet gear (54) has three.

8. The hybrid drive device according to claim 1, characterized by The hybrid drive device further comprises a housing accessory which is installed on the outer surface of the single motor (3) and the planetary gear assembly (5).

9. The hybrid drive device according to claim 1, characterized by The hybrid drive device further comprises a battery which is electrically connected with the single motor (3).

10. The hybrid drive device according to claim 1, characterized by The engine (1) is a hybrid engine DHE.

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