A hybrid transmission system for a vehicle

Abstract

The present invention provides a hybrid transmission transmission system for an automobile, belonging to the field of vehicle technology. It solves the problem that the existing transmission transmission system has insufficient working stability. The hybrid transmission transmission system for the automobile includes a first motor, a second motor, an engine clutch and a transmission, and also includes a first damper and a second damper. The output shaft of the engine, the first damper, the rotor of the first motor, the second damper, the engine clutch, the rotor of the second motor and the main input shaft of the transmission are connected in sequence. The transmission transmission system improves the working stability.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicles and relates to a hybrid power transmission system of an automobile. Background Art

[0002] Hybrid power refers to a vehicle that has both fuel and electric drive. Hybrid vehicles are valued because they have both electric and fuel drive and have the advantages of both fuel vehicles and pure electric vehicles. Common hybrid powertrain systems on the market include single-motor hybrid systems and dual-motor hybrid systems. Single-motor hybrid systems include an engine, a single motor and a transmission, while dual-motor hybrid systems include an engine, two motors and a transmission. Generally, the motor can be set in front of the engine, behind the engine, in front of the transmission, and in the transmission.

[0003] One of the hybrid power transmission systems includes a first motor, a second motor, a power battery, an engine, a clutch and a transmission, the power battery is connected to the first motor and the second motor, the engine, the first motor, the clutch and the transmission are connected in sequence, the second motor is directly connected to the transmission, and the second motor is also connected to the clutch. By controlling the separation and closure of the clutch and controlling the operation of the engine, three operating modes can be realized, namely, a pure motor drive mode, a charging series drive mode and a parallel hybrid mode. For example, when the engine is not working and the clutch is separated, the power battery supplies power to the second motor, and only the second motor drives the transmission to realize the pure motor drive mode; when the engine is working and the clutch is separated, the power battery supplies power to the second motor, and only the second motor drives the transmission, and at the same time the engine works to drive the first motor to rotate, and the first motor charges the power battery to increase the travel, realizing the charging series drive mode; when the engine is working and the clutch is closed, the engine and the second motor realize parallel connection and jointly drive the transmission to realize the parallel hybrid mode.

[0004] In the parallel hybrid mode, since the engine is connected to the rotor of the first motor, the vibration generated by the engine when it is working will be directly transmitted to the rotor of the first motor, causing the rotor of the first motor to vibrate. In addition, since the engine, the first motor, the clutch and the transmission are connected in sequence, the clutch is also connected to the second motor, and the second motor is directly connected to the transmission, when the clutch is closed, the vibration generated by the engine when it is working will also be transmitted to the transmission through the clutch and the second motor respectively. The superposition of vibrations will cause the vibration of the transmission to intensify, reducing the stability of the transmission system. Summary of the invention

[0005] The purpose of the present invention is to address the above problems existing in the prior art and to propose a hybrid transmission system for an automobile. The technical problem to be solved is: how to improve the working stability of the transmission system.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A hybrid transmission transmission system for an automobile, the automobile includes an engine, the hybrid transmission transmission system for the automobile includes a first motor, a second motor, an engine clutch and a transmission, and also includes a first shock absorber and a second shock absorber, wherein the output shaft of the engine, the first shock absorber, the rotor of the first motor, the second shock absorber, the engine clutch, the rotor of the second motor and the main input shaft of the transmission are connected in sequence.

[0008] Since the first shock absorber is connected between the output shaft of the engine and the rotor of the first motor, and the second shock absorber is connected between the rotor of the first motor and the engine clutch, the engine, the first motor and the second motor are separated by the first shock absorber and the second shock absorber, respectively, so that the vibrations generated by the engine, the first motor and the second motor when working will not be superimposed on each other, thereby improving the stability of the transmission system and reducing vibration noise. In addition, by controlling the power on and off of the first motor and the second motor and the clutch control of the engine clutch, the transmission system can form multiple working modes. During the process of switching the working mode, it is the moment of sudden change of power and motion. After the first shock absorber and the second shock absorber are set at the same time, the influence between the engine, the first motor and the second motor when the power and motion suddenly change can be reduced, which is conducive to improving the stability when the working mode is switched. Therefore, the transmission system of the transmission improves the stability of work.

[0009] In the above hybrid transmission transmission system of the automobile, the second damper is arranged in the inner hole of the first motor rotor, and the engine clutch is arranged in the inner hole of the second motor rotor. After such arrangement, while ensuring the smooth operation of the transmission system without affecting the functions of the second damper and the engine clutch, the axial length of the transmission system can also be shortened, making the transmission system compact.

[0010] In the above-mentioned hybrid transmission transmission system of the automobile, the first motor and the second motor are electrically connected to the power battery respectively, and the hybrid transmission transmission system of the automobile has any one or more of the following working modes:

[0011] In the motor drive mode, the engine clutch is in a disengaged state, the engine and the first motor are in a stopped state, the power battery discharges the second motor to make the second motor work, and the transmission is in a working state;

[0012] In series mode, the engine clutch is in a disengaged state, the engine works to make the first motor work and charge the power battery through the first motor, the power battery discharges the second motor to make the second motor work, and the transmission is in a working state;

[0013] In parallel mode, the engine clutch is in a closed state, the first motor is stopped, the engine is running and transmits power to the rotor of the second motor through the rotor of the first motor and the engine clutch, and at the same time, the power battery discharges the second motor to make the second motor work, and the transmission is in a working state;

[0014] In the all-wheel drive mode, the engine clutch is in a closed state, the engine is working and transmits power to the rotor of the second motor through the rotor of the first motor and the engine clutch, and at the same time, the power battery discharges the first motor and the second motor to make the first motor and the second motor work, and the transmission is in a working state;

[0015] In charging mode, the engine clutch is in a closed state, the second motor is stopped, the engine is running to make the first motor work and charge the power battery through the first motor, and at the same time, the engine transmits power to the transmission through the rotor of the first motor, the engine clutch and the rotor of the second motor, and the transmission is in a working state;

[0016] In idle charging mode, the engine clutch is in a disengaged state, the second motor and the transmission are in a stopped state, the engine is running to make the first motor work and charge the power battery through the first motor;

[0017] In energy recovery mode, the engine clutch is in a disengaged state, the engine and the first motor are in a stopped state, the transmission works to make the second motor work and charge the power battery through the second motor.

[0018] The hybrid transmission drive system can realize seven working modes, so that the drive system can better adapt to various working conditions and ensure the smooth operation. At the same time, it can reduce energy waste and help improve the fuel economy of the vehicle.

[0019] In the above-mentioned hybrid transmission drive system of the automobile, the transmission includes a first planetary gear train, a second planetary gear train, a third planetary gear train and a fourth planetary gear train which are coaxially arranged in sequence.

[0020] The planetary gear train has a compact structure and a small size. The transmission consists of the first planetary gear train, the second planetary gear train, the third planetary gear train and the fourth planetary gear train which are coaxially arranged in sequence, which can make the transmission structure more reasonable and compact and reduce the overall volume of the transmission system. At the same time, the transmission is a multi-speed transmission, which improves the power of the vehicle and the smoothness of gear shifting.

[0021] In the above-mentioned hybrid transmission transmission system of the automobile, the transmission also includes a first clutch, a second clutch and a third clutch, the first planetary gear train includes a first sun gear, a first planet carrier and a first outer ring gear, the second planetary gear train includes a second sun gear, a second planet carrier and a second outer ring gear, the third planetary gear train includes a third sun gear, a third planet carrier and a third outer ring gear, the fourth planetary gear train includes a fourth sun gear, a fourth planet carrier and a fourth outer ring gear, the first sun gear is connected to a first brake, the first outer ring gear is connected to a second brake, the first planet carrier is fixedly connected to the fourth outer ring gear, the second sun gear is fixedly connected to the first sun gear, the second outer ring gear is fixedly connected to the third sun gear, the second planet carrier is fixedly connected to the main input shaft of the transmission, the third sun gear is connected to the third outer ring gear through the third clutch, the fourth sun gear is connected to the main input shaft of the transmission through the first clutch, the third outer ring gear is fixedly connected to the fourth sun gear, and the third planet carrier is connected to the fourth planet carrier through the second clutch.

[0022] By controlling the separation and closing of the first brake, the second brake, the first clutch, the second clutch, and the third clutch, eight forward gears and one reverse gear can be achieved, which improves the power of the vehicle and the smoothness of gear shifting. The main output shaft of the transmission is only connected to the fourth planetary carrier and can be separated by the second clutch, which reduces the rotational inertia of the main output shaft of the transmission, reduces the no-load torque, and improves the transmission efficiency. The first clutch, the second clutch, and the third clutch are close to the main output shaft of the transmission to reduce the drag torque of the transmission. At the same time, such a structure and layout can also improve the stability and reliability of the transmission system.

[0023] In the hybrid transmission system of the automobile, the first brake is arranged between the second motor and the first planetary gear train, and the second brake is arranged outside the first planetary gear train. This can make the transmission structure compact, reduce the influence of the sudden change of the braking torque during the gear shifting process, and make the gear shifting process smooth.

[0024] In the hybrid transmission system of the automobile, the first clutch, the second clutch and the third clutch are all arranged between the third planetary gear train and the fourth planetary gear train, the third clutch is close to the third planetary gear train, and the second clutch is close to the fourth planetary gear train. This can make the transmission structure compact and reduce the drag torque of the transmission.

[0025] In the above-mentioned hybrid transmission system of the automobile, the first sun gear, the second sun gear, the third sun gear and the fourth sun gear are all mounted on the main input shaft of the transmission, and the main input shaft of the transmission is an integrated structure.

[0026] The first sun gear, the second sun gear, the third sun gear and the fourth sun gear are all mounted on the main input shaft of the transmission, so that the installation of the first planetary gear train, the second planetary gear train, the third planetary gear train and the fourth planetary gear train are all positioned through the main input shaft of the transmission, making the transmission structure compact. At the same time, the main input shaft of the transmission is an integrated structure, which can not only improve the rigidity of the main input shaft of the speed reducer, but also accurately position the first planetary gear train, the second planetary gear train, the third planetary gear train and the fourth planetary gear train, which is beneficial to the stability and reliability of the operation of the transmission system.

[0027] In the hybrid transmission transmission system of the above-mentioned automobile, the hybrid transmission transmission system also includes a housing, the stator of the first motor and the stator of the second motor are both located in the housing and fixed to the housing, the first brake and the second brake are both located in the housing and fixed to the housing, and the first planetary gear train, the second planetary gear train, the third planetary gear train and the fourth planetary gear train are all installed in the housing.

[0028] The first motor, the second motor, the first brake, the second brake, the first planetary gear train, the second planetary gear train, the third planetary gear train and the fourth planetary gear train are all integrated and installed in one housing, which can reduce the overall volume of the transmission system and make the internal structure of the transmission compact. At the same time, the main input shaft of the transmission, the main output shaft of the transmission, the first motor and the second motor can form a unified installation positioning standard with the same housing, so that the main input shaft of the transmission, the main output shaft of the transmission, the first motor and the second motor are accurately installed, reducing the working vibration caused by the installation position deviation, which is conducive to ensuring the stability and reliability of the transmission system.

[0029] In the above-mentioned hybrid transmission transmission system of the automobile, an intermediate input shaft is connected between the first shock absorber and the rotor of the first motor, and the intermediate input shaft, the main input shaft of the transmission and the main output shaft of the transmission are coaxially arranged. The intermediate input shaft can form a spline connection or a single key connection with the rotor of the first motor. The arrangement of the intermediate input shaft makes it easy to install the first shock absorber and the rotor of the first motor, and can also reduce the transmission of radial vibration, which is conducive to ensuring the stability of the operation. The coaxial arrangement of the intermediate input shaft, the main input shaft of the transmission and the main output shaft of the transmission is conducive to ensuring the stability and reliability of the operation of the transmission system.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] The first shock absorber and the second shock absorber are arranged at the same time, and the output shaft of the engine, the first shock absorber, the rotor of the first motor, the second shock absorber, the engine clutch, the rotor of the second motor and the main input shaft of the transmission are connected in sequence, which can improve the stability and reliability of the transmission system and reduce noise. It has seven working modes, can adapt to more working conditions, and improve the riding comfort and fuel economy of the vehicle. It has eight forward gears and one reverse gear, realizes multiple speed ratios, improves the smoothness of gear shifting, improves the power of the whole vehicle, and meets the driving power requirements of the driver. The arrangement and position relationship of all parts make the internal space layout of the transmission system compact and reasonable, with high reliability and simple control. In short, the transmission system has a simple structure, a compact and reasonable internal space layout, high reliability, simple control, and will be greatly improved in terms of the working stability of the transmission system, the riding comfort of the vehicle, the smoothness of gear shifting and the fuel economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a transmission relationship diagram of the transmission system;

[0033] Figure 2 This is the energy flow diagram when the transmission system is in motor drive mode;

[0034] Figure 3 This is the energy flow diagram when the transmission system is in series mode;

[0035] Figure 4 This is the energy flow diagram when the transmission system is in parallel mode;

[0036] Figure 5 It is the energy flow diagram when the transmission system is in the all-wheel drive mode;

[0037] Figure 6 is the energy flow diagram of the transmission system when it is in charging mode;

[0038] Figure 7 It is the energy flow diagram when the transmission system is in idle charging mode;

[0039] Figure 8 This is the energy flow diagram when the transmission system is in energy recovery mode.

[0040] In the figure, 1, power battery; 2, PCM circuit protection module; 3, differential; 10, engine; 10a, output shaft; TD1, first shock absorber; 100, intermediate input shaft; EM1, first motor; EM2, second motor; C0, engine clutch; TD2, second shock absorber; 20, transmission; 200, main input shaft; 300, main output shaft; 400, housing; B1, first brake; B2, second brake; 201, first planetary gear train; S1, first sun gear; Z1, first planetary gear; R1, The first outer ring gear; P1, the first planetary carrier; 202, the second planetary gear train; S2, the second sun gear; Z2, the second planetary gear; R2, the second outer ring gear; P2, the second planetary carrier; 203, the third planetary gear train; S3, the third sun gear; Z3, the third planetary gear; R3, the third outer ring gear; P3, the third planetary carrier; 204, the fourth planetary gear train; S4, the fourth sun gear; Z4, the fourth planetary gear; R4, the fourth outer ring gear; P4, the fourth planetary carrier; C1, the first clutch; C2, the second clutch; C3, the third clutch. DETAILED DESCRIPTION

[0041] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0042] Embodiment 1

[0043] like Figure 1-Figure 8 As shown, the automobile includes an engine 10, a hybrid transmission transmission system of the automobile, including a first shock absorber TD1, an intermediate input shaft 100, a first motor EM1, a second shock absorber TD2, an engine clutch C0, a second motor EM2, a transmission 20 and a housing 400. The first motor EM1 and the second motor EM2 are electrically connected to the power battery 1 respectively, that is, the power battery 1 is connected to the first motor EM1 and the second motor EM2 respectively through wires. The power battery 1 is installed outside the housing 400, the first motor EM1 and the second motor EM2 are arranged in the housing 400, and the stator of the first motor EM1 and the stator of the second motor EM2 are fixed to the housing 400. A PCM circuit protection module 2 is installed on the power battery 1 to ensure the stability and safety of the use of the power battery 1. The PCM circuit protection module 2 is connected to the controller of the vehicle, and the controller of the vehicle can control the charging and discharging of the power battery 1 through the PCM circuit protection module 2. The charging and discharging between the power battery 1 and the first motor EM1 and the charging and discharging between the power battery 1 and the second motor EM2 can be performed independently.

[0044] like Figure 1As shown, the transmission 20 is arranged in the housing 400, and the transmission 20 includes a main input shaft 200, a first planetary gear train 201, a second planetary gear train 202, a third planetary gear train 203, a fourth planetary gear train 204 and a main output shaft 300. The main input shaft 200 is an integrated structure and the main output shaft 300 is coaxially arranged with the main input shaft 200. The first planetary gear train 201, the second planetary gear train 202, the third planetary gear train 203 and the fourth planetary gear train 204 are coaxially arranged and arranged in sequence. The rear end of the main output shaft 300 is also drivingly connected to the differential 3, and the wheels are drivingly connected to the differential 3.

[0045] The first planetary gear train 201 includes a first sun gear S1, a first planetary gear Z1, a first planetary carrier P1 and a first outer gear ring R1. The first sun gear S1 is mounted on the main input shaft 200, the first outer gear ring R1 is mounted on the outside of the first sun gear S1, the first planetary gear Z1 is rotatably mounted on the first planetary carrier P1, the first planetary gear Z1 is located between the first sun gear S1 and the first outer gear ring R1 and meshes with both. The second planetary gear train 202 includes a second sun gear S2, a second planetary gear Z2, a second planetary carrier P2 and a second outer gear ring R2. The second sun gear S2 is mounted on the main input shaft 200, the second outer gear ring R2 is mounted on the outside of the second sun gear S2, the second planetary gear Z2 is rotatably mounted on the second planetary carrier P2, the second planetary gear Z2 is located between the second sun gear S2 and the second outer gear ring R2 and meshes with both. The third planetary gear train 203 includes a third sun gear S3, a third planetary gear Z3, a third planetary carrier P3 and a third outer gear ring R3. The third sun gear S3 is mounted on the main input shaft 200, the third outer gear ring R3 is mounted on the outer side of the second sun gear S2, the third planet gear Z3 is rotatably mounted on the third planet carrier P3, and the third planet gear Z3 is located between the third sun gear S3 and the third outer gear ring R3 and meshes with both. The fourth planetary gear train 204 includes a fourth sun gear S4, a fourth planet gear Z4, a fourth planet carrier P4 and a fourth outer gear ring R4. The fourth sun gear S4 is mounted on the main input shaft 200, the fourth outer gear ring R4 is mounted on the outer side of the fourth sun gear S4, the fourth planet gear Z4 is rotatably mounted on the fourth planet carrier P4, the fourth planet gear Z4 is located between the fourth sun gear S4 and the fourth outer gear ring R4 and meshes with both. Since the main input shaft 200 is an integrated structure, and the first sun gear S1, the second sun gear S2, the third sun gear S3 and the fourth sun gear S4 are all mounted on the main input shaft 200, the first planetary gear train 201, the second planetary gear train 202, the third planetary gear train 203 and the fourth planetary gear train 204 are coaxially arranged.

[0046] The transmission 20 further includes a first brake B1, a second brake B2, a first clutch C1, a second clutch C2 and a third clutch C3. The first brake B1 is arranged between the second motor EM2 and the first planetary gear train 201, the outer hub of the first brake B1 is fixedly connected to the housing 400, and the inner hub of the first brake B1 is fixedly connected to the first sun gear S1. The second brake B2 is arranged on the outer side of the first outer gear ring R1, the outer hub of the second brake B2 is fixedly connected to the housing 400, and the inner hub of the second brake B2 is fixedly connected to the first outer gear ring R1. The first planetary carrier P1 is fixedly connected to the fourth outer gear ring R4. The connecting member arranged between the first planetary carrier P1 and the fourth outer gear ring R4 is located on the outer side of the second planetary gear train 202, the third planetary gear train 203, the fourth planetary gear train 204, the first brake B1, the second brake B2 and the third brake. The second sun gear S2 is fixedly connected to the first sun gear S1, that is, the first sun gear S1 and the second sun gear S2 are both controlled by the first brake B1. The second outer gear ring R2 is fixedly connected to the third sun gear S3, and the second planetary carrier P2 is fixedly connected to the main input shaft 200 of the transmission 20. The third sun gear S3 is connected to the third outer gear ring R3 through the third clutch C3, the fourth sun gear S4 is connected to the main input shaft 200 of the transmission 20 through the first clutch C1, the third outer gear ring R3 is fixedly connected to the fourth sun gear S4, and the third planetary carrier P3 is connected to the fourth planetary carrier P4 through the second clutch C2. Specifically, the third sun gear S3 is fixedly connected to the inner hub of the third clutch C3, the third outer gear ring R3 is fixedly connected to the outer hub of the third clutch C3, and the third planetary carrier P3 is fixedly connected to the inner hub of the second clutch C2; the fourth sun gear S4 is fixedly connected to the outer hub of the first clutch C1, the outer hub of the first clutch C1 is also fixedly connected to the outer hub of the third clutch C3, and the inner hub of the first clutch C1 is fixedly connected to the main input shaft 200 of the transmission 20; the fourth planetary carrier P4 is fixedly connected to the outer hub of the second clutch C2, and the fourth planetary carrier P4 is also fixedly connected to the main output shaft 300 of the transmission 20. The first clutch C1, the second clutch C2 and the third clutch C3 are all arranged between the third planetary gear train 203 and the fourth planetary gear train 204, the third clutch C3 is close to the third planetary gear train 203, and the second clutch C2 is close to the fourth planetary gear train 204. The connecting piece arranged between the third planet carrier P3 and the inner hub of the second brake B2 is located outside the third planetary gear train 203, the first brake B1 and the third brake.

[0047] The first brake B1, the second brake B2, the first clutch C1, the second clutch C2 and the third clutch C3 are all connected to the vehicle controller. As shown in Table 1, the vehicle controller can achieve multi-speed shifting by controlling the closing and separation of the first brake B1, the second brake B2, the first clutch C1, the second clutch C2 and the third clutch C3. As shown in Table 1, the transmission 20 has eight forward gears and one reverse gear. Among them, the D1 gear is the first forward gear, the D2 gear is the second forward gear, the D3 gear is the third forward gear, the D4 gear is the fourth forward gear, the D5 gear is the fifth forward gear, the D6 gear is the sixth forward gear, the D7 gear is the seventh forward gear, the D8 gear is the eighth forward gear, and the R gear is the reverse gear; the speed ratio is the ratio between the speed of the main input shaft 200 and the speed of the main output shaft 300; the gradient is the ratio between the speed ratios of two adjacent gears, see the remarks column in Table 1 for details, such as D1 / D2 refers to the gradient as the ratio between the speed ratio of the D1 gear and the speed ratio of the D2 gear.

[0048] like Figure 1 As shown in Table 1, when in the D1 gear, the first brake B1, the second brake B2 and the first clutch C1 are in a closed state, and the second clutch C2 and the third clutch C3 are in a disengaged state. When in the D2 gear, the first brake B1, the second brake B2 and the third clutch C3 are in a closed state, and the first clutch C1 and the second clutch C2 are in a disengaged state. When in the D3 gear, the second brake B2, the first clutch C1 and the third clutch C3 are in a closed state, and the first brake B1 and the second clutch C2 are in a disengaged state. When in the D4 gear, the second brake B2, the second clutch C2 and the third clutch C3 are in a closed state, and the first brake B1 and the first clutch C1 are in a disengaged state. When in the D5 gear, the second brake B2, the first clutch C1 and the second clutch C2 are in a closed state, and the first brake B1 and the third clutch C3 are in a disengaged state. When in the D6 gear, the first clutch C1, the second clutch C2 and the third clutch C3 are in a closed state, and the first brake B1 and the second brake B2 are in a disengaged state. In the D7 gear, the first brake B1, the first clutch C1 and the second clutch C2 are in the closed state, and the second brake B2 and the third clutch C3 are in the disengaged state. In the D8 gear, the first brake B1, the second clutch C2 and the third clutch C3 are in the closed state, and the second brake B2 and the first clutch C1 are in the disengaged state. In the R gear, the first brake B1, the second brake B2 and the second clutch C2 are in the closed state, and the first clutch C1 and the third clutch C3 are in the disengaged state.

[0049] Table 1 Working status of clutch and brake corresponding to each gear in the transmission

[0050]

[0051] (● indicates closed state, ○ indicates optional closure)

[0052] like Figure 1 As shown, the engine 10 is located outside the housing 400, and the engine 10 has an output shaft 10a. The output shaft 10a of the engine 10, the first damper TD1, the rotor of the first motor EM1, the second damper TD2, the engine clutch C0, the rotor of the second motor EM2 and the main input shaft 200 of the transmission 20 are connected in sequence. The first damper TD1 and the second damper TD2 are torsion dampers that can be directly purchased on the market, and their specific structures are not described in detail. The first damper TD1 is located outside the housing 400, and an intermediate shaft is connected between the first damper TD1 and the rotor of the first motor EM1, and the intermediate shaft is coaxially arranged with the main input shaft 200 of the transmission 20. The intermediate shaft can form a spline connection or a single key connection with the rotor of the first motor EM1, which is easy to install. The second damper TD2 is arranged in the inner hole of the rotor of the first motor EM1, the engine clutch C0 is arranged in the inner hole of the rotor of the second motor EM2, the inner hub of the engine clutch C0 is connected to the second damper TD2, and the outer hub of the engine clutch C0 is fixedly connected to the rotor of the second motor EM2. The engine 10 and the engine clutch C0 are also connected to a controller of the vehicle, and the controller of the vehicle can control the operating state of the engine 10 and can control the closing and release of the engine clutch C0.

[0053] As shown in Table 2 and Figure 2-Figure 8 As shown in Table 2, according to the different working states of the various components of the hybrid transmission system, the hybrid transmission system of the car has seven working modes: Electric Drive Mode, Series Hybrid Mode, Parallel Hybrid Drive Mode, All Power Drive Mode, Charging Mode, Idling Charging Mode, and Energy Recovery Mode. Figure 2-Figure 8In the embodiment, the power battery 1 discharges means that the power battery 1 discharges and transmits electric energy to the first motor EM1 and / or the second motor EM2; the power battery 1 discharges and charges means that the first motor EM1 and / or the second motor EM2 transmits electric energy to the power battery 1; the engine 10 is stopped means that the engine 10 is not working and does not output kinetic energy, that is, the output shaft 10a of the engine 10 does not rotate; the engine 10 is working means that the engine 10 outputs kinetic energy, that is, the output shaft 10a of the engine 10 rotates; the first motor EM1 is stopped means that the first motor EM1 is not powered on or does not generate electric energy, that is, there is no electric energy transmission between the power battery 1 and the first motor EM1; the first motor EM 1 working means that the first motor EM1 is powered on or generates electric energy, that is, there is electric energy transmission between the power battery 1 and the first motor EM1; the second motor EM2 is shut down means that the second motor EM2 is not powered on or does not generate electric energy, that is, there is no electric energy transmission between the power battery 1 and the second motor EM2; the second motor EM2 is working means that the second motor EM2 is powered on or generates electric energy, that is, there is electric energy transmission between the power battery 1 and the second motor EM2; the transmission 20 is working means that power is transmitted between the main input shaft 200 and the main output shaft 300 of the transmission 20; the transmission 20 is shut down means that no power is transmitted between the main input shaft 200 and the main output shaft 300 of the transmission 20.

[0054] As shown in Table 2 and Figure 2 As shown, the first working mode is the motor drive mode, at which the engine clutch C0 is in a disengaged state, the engine 10 and the first motor EM1 are in a stopped state, the power battery 1 discharges the second motor EM2 to make the second motor EM2 work, and the transmission 20 is in a working state. The driving power of the vehicle comes from the second motor EM2, the power battery 1 provides electrical energy to the second motor EM2, the rotor of the second motor EM2 rotates and drives the wheels to rotate through the transmission 20. It is more suitable when the power battery 1 is fully charged and the vehicle is driving at medium and low speeds, and can also be used in other suitable working conditions.

[0055] As shown in Table 2 and Figure 3 As shown, the second working mode is the series mode, at this time, the engine clutch C0 is in a disengaged state, the engine 10 works to make the first motor EM1 work and charge the power battery 1 through the first motor EM1, the power battery 1 discharges the second motor EM2 to make the second motor EM2 work, and the transmission 20 is in a working state. The driving power of the vehicle comes from the second motor EM2, the engine 10 drives the rotor of the first motor EM1 to rotate, the first motor EM1 is used as a generator and charges the power battery 1, the power battery 1 then provides electrical energy to the second motor EM2, the rotor of the second motor EM2 rotates and drives the wheels to rotate through the transmission 20. It is more suitable when the power battery 1 is insufficient and driving at medium and low speeds, and can also be used in other suitable working conditions.

[0056] As shown in Table 2 and Figure 4As shown, the third working mode is the parallel mode, the engine clutch C0 is in a closed state, the first motor EM1 is stopped, the engine 10 is working and transmits power to the rotor of the second motor EM2 through the rotor of the first motor EM1 and the engine clutch C0, and at the same time, the power battery 1 discharges the second motor EM2 to make the second motor EM2 work, and the transmission 20 is in a working state. The driving power of the vehicle comes from the engine 10 and the second motor EM2. The engine 10 drives the rotor of the first motor EM1 and the rotor of the second motor EM2 to rotate in sequence. At the same time, the power battery 1 provides electrical energy to the second motor EM2, and the power battery 1 also drives the rotor of the second motor EM2 to rotate. The driving force is superimposed on the rotor of the second motor EM2 and drives the wheels to rotate through the transmission 20. It is more suitable when the power battery 1 is fully charged and driving at high speed, and can also be used in other suitable working conditions.

[0057] As shown in Table 2 and Figure 5 As shown, the fourth working mode is the all-wheel drive mode, the engine clutch C0 is in a closed state, the engine 10 is working and transmits power to the rotor of the second motor EM2 through the rotor of the first motor EM1 and the engine clutch C0, and at the same time, the power battery 1 discharges the first motor EM1 and the second motor EM2 to make the first motor EM1 and the second motor EM2 work, and the transmission 20 is in a working state. The driving power of the vehicle comes from the engine 10, the first motor EM1 and the second motor EM2. The engine 10 drives the rotor of the first motor EM1 and the rotor of the second motor EM2 to rotate in sequence, and at the same time, the power battery 1 provides electrical energy to the first motor EM1 and the second motor EM2. The power battery 1 drives the rotor of the first motor EM1 and the rotor of the second motor EM2 to rotate, and the driving force is superimposed on the rotor of the second motor EM2 to drive the wheels to rotate through the transmission 20. It is more suitable when the power battery 1 is fully charged and accelerating, and can also be used in other suitable working conditions.

[0058] As shown in Table 2 and Figure 6 As shown, the fifth working mode is the charging mode, the engine clutch C0 is in a closed state, the second motor EM2 is stopped, the engine 10 works to make the first motor EM1 work and charge the power battery 1 through the first motor EM1, and at the same time, the engine 10 transmits power to the transmission 20 through the rotor of the first motor EM1, the engine clutch C0 and the rotor of the second motor EM2, and the transmission 20 is in a working state. The driving power of the vehicle comes from the engine 10, which drives the rotor of the first motor EM1 and the rotor of the second motor EM2 to rotate in turn, and the rotor of the second motor EM2 rotates to drive the wheels to rotate through the transmission 20, and at the same time, the first motor EM1 is used as a generator and charges the power battery 1. It is more suitable when the power battery 1 is insufficient and driving at high speed, and can also be used in other suitable working conditions.

[0059] As shown in Table 2 and Figure 7 As shown, the sixth working mode is the idle charging mode, the engine clutch C0 is in a disengaged state, the second motor EM2 and the transmission 20 are in a stopped state, the engine 10 works to make the first motor EM1 work and charge the power battery 1 through the first motor EM1. At this time, the vehicle is in neutral, the engine 10 drives the first motor EM1 to rotate, and the first motor EM1 is used as a generator to charge the power battery 1. It is more suitable for charging the power battery 1 when parking at a traffic light or temporarily waiting for parking, reducing energy waste, and can also be used for other suitable working conditions.

[0060] As shown in Table 2 and Figure 8 As shown, the seventh working mode is the energy recovery mode, the engine clutch C0 is in a disengaged state, the engine 10 and the first motor EM1 are in a stopped state, the transmission 20 works to make the second motor EM2 work and the power battery 1 is charged through the second motor EM2. At this time, the wheels rotate to drive the transmission 20 to work in reverse, and the transmission 20 works to drive the rotor of the second motor EM2 to rotate in reverse, and the second motor EM2 is used as a generator and charges the power battery 1. It is more suitable for vehicles going downhill, and can also be used in other suitable working conditions.

[0061] Table 2 Working status of each component of the transmission system in seven working modes

[0062]

[0063] The hybrid transmission transmission system can realize seven working modes, so that the transmission system can be better adapted to various working conditions, ensure the working stability, and reduce energy waste, which is conducive to achieving the fuel economy of the vehicle. The first shock absorber TD1 and the second shock absorber TD2 are set to separate the engine 10, the first motor EM1 and the second motor EM2 respectively, so that the vibrations generated by the engine 10, the first motor EM1 and the second motor EM2 during operation will not be superimposed on each other, thereby improving the working stability and reliability of the transmission system and reducing vibration noise. Moreover, the setting of the first shock absorber TD1 and the second shock absorber TD2 can also reduce the influence between the engine 10, the first motor EM1 and the second motor EM2 when the power and motion suddenly change, thereby facilitating the improvement of the stability when the working mode is switched. In addition, the hybrid transmission transmission system has multiple gear ratios, and the interval and gradient distribution of each gear ratio are more reasonable. The seven working modes of the dual motor can better play the vehicle's riding comfort, gear shifting smoothness and fuel economy. The maximum speed requirement of the dual motor of the transmission system is significantly lower than that of the single-stage hybrid motor. The motor speed range is equivalent to the engine 10 speed range, and the noise of the whole machine is significantly reduced. At the same time, due to the intervention of multiple gear ratios, the power of the whole vehicle is improved to meet the driver's driving power requirements. The overall layout of the first motor EM1, the second shock absorber TD2, the engine clutch C0, the second motor EM2, the first brake B1, the second brake B2, the first planetary gear train 201, the second planetary gear train 202, the third planetary gear train 203, the third clutch C3, the second clutch C2, the first clutch C1 and the fourth planetary gear train 204 in the housing 400 makes the transmission system have the advantages of relatively simple structure, compact and reasonable internal space layout, high reliability, simple control, etc.

[0064] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A hybrid transmission transmission system for an automobile, the automobile comprising an engine (10), the hybrid transmission transmission system for the automobile comprising a first motor (EM1), a second motor (EM2), an engine clutch (C0) and a transmission (20), characterized in that: The vehicle further comprises a first shock absorber (TD1) and a second shock absorber (TD2); the output shaft (10a) of the engine (10), the first shock absorber (TD1), the rotor of the first motor (EM1), the second shock absorber (TD2), the engine clutch (C0), the rotor of the second motor (EM2) and the main input shaft (200) of the transmission (20) are connected in sequence; the first motor (EM1) and the second motor (EM2) are electrically connected to the power battery (1) respectively; and the hybrid transmission drive system of the vehicle has the following multiple working modes: In the motor drive mode, the engine clutch (C0) is in a disengaged state, the engine (10) and the first motor (EM1) are in a stopped state, the power battery (1) discharges the second motor (EM2) to make the second motor (EM2) work, and the transmission (20) is in a working state; In the series mode, the engine clutch (C0) is in a disengaged state, the engine (10) is in operation to operate the first motor (EM1) and charge the power battery (1) through the first motor (EM1), the power battery (1) discharges the second motor (EM2) to operate the second motor (EM2), and the transmission (20) is in an operating state; In the parallel mode, the engine clutch (C0) is in a closed state, the first motor (EM1) is stopped, the engine (10) is working and transmits power to the rotor of the second motor (EM2) through the rotor of the first motor (EM1) and the engine clutch (C0), and at the same time, the power battery (1) discharges the second motor (EM2) to make the second motor (EM2) work, and the transmission (20) is in a working state; In the all-wheel drive mode, the engine clutch (C0) is in a closed state, the engine (10) is operating and transmits power to the rotor of the second motor (EM2) through the rotor of the first motor (EM1) and the engine clutch (C0), while the power battery (1) discharges the first motor (EM1) and the second motor (EM2) to operate the first motor (EM1) and the second motor (EM2), and the transmission (20) is in an operating state; In the charging mode, the engine clutch (C0) is in a closed state, the second motor (EM2) is stopped, the engine (10) is in operation to operate the first motor (EM1) and charge the power battery (1) through the first motor (EM1), and at the same time, the engine (10) transmits power to the transmission (20) through the rotor of the first motor (EM1), the engine clutch (C0) and the rotor of the second motor (EM2), and the transmission (20) is in an operating state; In an idle charging mode, the engine clutch (C0) is in a disengaged state, the second motor (EM2) and the transmission (20) are in a stopped state, and the engine (10) is operating to cause the first motor (EM1) to operate and charge the power battery (1) through the first motor (EM1); In the energy recovery mode, the engine clutch (C0) is in a disengaged state, the engine (10) and the first motor (EM1) are in a stopped state, the transmission (20) operates to operate the second motor (EM2) and charge the power battery (1) through the second motor (EM2).

2. The hybrid transmission drive system of a vehicle according to claim 1, characterized in that: The second damper (TD2) is arranged in the inner hole of the rotor of the first motor (EM1), and the engine clutch (C0) is arranged in the inner hole of the rotor of the second motor (EM2).

3. The hybrid transmission drive system of a vehicle according to claim 1 or 2, characterized in that: The transmission (20) comprises a first planetary gear train (201), a second planetary gear train (202), a third planetary gear train (203) and a fourth planetary gear train (204) which are coaxially arranged in sequence.

4. The hybrid transmission drive system of a vehicle according to claim 3, characterized in that: The transmission (20) further comprises a first clutch (C1), a second clutch (C2) and a third clutch (C3); the first planetary gear train (201) comprises a first sun gear (S1), a first planet carrier (P1) and a first outer gear ring (R1); the second planetary gear train (202) comprises a second sun gear (S2), a second planet carrier (P2) and a second outer gear ring (R2); the third planetary gear train (203) comprises a third sun gear (S3), a third planet carrier (P3) and a third outer gear ring (R3); the fourth planetary gear train (204) comprises a fourth sun gear (S4), a fourth planet carrier (P4) and a fourth outer gear ring (R4); the first sun gear (S1) is connected to a first brake (B1); the first outer gear ring (R1) is connected to a second brake (B2); A second brake (B2) is provided, the first planet carrier (P1) is fixedly connected to the fourth outer ring gear (R4), the second sun gear (S2) is fixedly connected to the first sun gear (S1), the second outer ring gear (R2) is fixedly connected to the third sun gear (S3), the second planet carrier (P2) is fixedly connected to the main input shaft (200) of the transmission (20), the third sun gear (S3) is connected to the third outer ring gear (R3) through a third clutch (C3), the fourth sun gear (S4) is connected to the main input shaft (200) of the transmission (20) through the first clutch (C1), the third outer ring gear (R3) is fixedly connected to the fourth sun gear (S4), and the third planet carrier (P3) is connected to the fourth planet carrier (P4) through the second clutch (C2).

5. The hybrid transmission drive system of a vehicle according to claim 4, characterized in that: The first brake (B1) is arranged between the second motor (EM2) and the first planetary gear train (201), and the second brake (B2) is arranged outside the first planetary gear train (201).

6. The hybrid transmission drive system for an automobile according to claim 4, characterized in that: The first clutch (C1), the second clutch (C2) and the third clutch (C3) are all arranged between the third planetary gear train (203) and the fourth planetary gear train (204); the third clutch (C3) is close to the third planetary gear train (203), and the second clutch (C2) is close to the fourth planetary gear train (204).

7. The hybrid transmission drive system for an automobile according to claim 4, characterized in that: The first sun gear (S1), the second sun gear (S2), the third sun gear (S3) and the fourth sun gear (S4) are all mounted on a main input shaft (200) of the transmission (20), and the main input shaft (200) of the transmission (20) is an integrated structure.

8. The hybrid transmission drive system for an automobile according to claim 4, characterized in that: The hybrid transmission drive system further comprises a housing (400), the stator of the first motor (EM1) and the stator of the second motor (EM2) are both located in the housing (400) and fixed to the housing (400), the first brake (B1) and the second brake (B2) are both located in the housing (400) and fixed to the housing (400), and the first planetary gear train (201), the second planetary gear train (202), the third planetary gear train (203) and the fourth planetary gear train (204) are all installed in the housing (400).

9. The hybrid transmission drive system of an automobile according to claim 1 or 2, characterized in that: An intermediate input shaft (100) is connected between the first damper (TD1) and the rotor of the first motor (EM1), and the intermediate input shaft (100), the main input shaft (200) of the transmission (20) and the main output shaft (300) of the transmission (20) are coaxially arranged.

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