CN106976390A - A kind of planet series parallel type bimodulus drive system of hybrid power vehicle - Google Patents

Abstract

The invention discloses a kind of planet series parallel type bimodulus drive system of hybrid power vehicle; it is related to automobile technical field, including engine, preceding planet row, rear planet row, clutch, No. two clutches, freewheel clutch, holdback, brake, a motor and No. two motors；The switching of different working modes can be realized with separating by the engagement of clutch and brake.Structure design of the present invention is compact, is effectively reduced the power grade of motor, reduces motor size, improves the climbable gradient performance of vehicle under electric-only mode, improves the low-speed performance under vehicle electric-only mode；Solve between the shortcoming that automobile produces parasitic power when high velocity is run, the high efficient area for improving hybrid power system, improve the economy of vehicle；Automobile is solved the problem of low regime acceleration difference and limited climbing capacity, the dynamic property and economy of vehicle is improved.

Description

A planetary hybrid dual-mode hybrid vehicle drive system

technical field

The invention relates to the technical field of automobiles, in particular to a drive system for a planetary hybrid dual-mode hybrid vehicle.

Background technique

With the continuous aggravation of the energy crisis and the deterioration of the ecological environment, energy conservation and environmental protection have become two major themes that the international community has focused on. Governments of various countries have introduced relevant policies to encourage and promote the research and development of new energy vehicles. Among them, fuel cell vehicles and pure electric vehicles are difficult to popularize in the short term due to technical reasons. Therefore, as a transitional product, hybrid vehicles are getting more and more attention. As the most effective energy-saving vehicle solution at present, the driving system of hybrid electric vehicles has three forms: series connection, parallel connection and hybrid connection. Series connection can realize the optimal control of the engine, but all the energy will be converted twice, and the loss is relatively large; parallel connection can achieve better transmission efficiency, but the mechanical connection between the engine and the output shaft cannot ensure that the engine is always in a better working area ; Hybrid connection can combine the advantages of series connection and parallel connection, and avoid the disadvantages of both. It is the most optimized configuration scheme among the three.

The current hybrid hybrid vehicles mainly use planetary mechanisms as power splitting devices. Typical structures include Toyota's THS system and general-purpose AHS system. Among them, Toyota's THS system can only realize the input power split mode, and the drive motor is directly connected to the output ring gear, which requires high performance. In order to meet good power performance, it is necessary to select a motor with a higher power level, which is very common. To a large extent, the cost of the whole vehicle and the difficulty of installation are increased. In addition, because the THS system can only realize the input power split mode, its transmission efficiency in the high-speed area is relatively small. Although GM's AHS system can realize dual-mode control, most of them use a three-row planetary gear mechanism for power splitting, and at the same time need to control multiple clutches and locks for mode switching, resulting in complex structure and difficult control.

At present, most of the existing patents of the planetary hybrid dual-mode hybrid vehicle drive system can only realize the traditional power split mode, and the high efficiency range of the hybrid system is small; at the same time, the output torque of this type of patented hybrid system is small , there are fewer pure electric modes. In order to meet the power requirements such as climbing performance, it is necessary to select a motor with a higher power level and a larger size. For example, Chinese Patent Publication No. CN104960407A, published on 2015-10-07, discloses an integrated planetary gear oil-electric hybrid dual-mode hybrid power system. The transmission efficiency is small, and a large magnetic field weakening loss will be generated in the pure electric mode; and the output torque of the system is small, in order to meet the requirements of climbing performance, it is necessary to match a motor with a higher power level. A planetary series dual-mode hybrid vehicle drive system combines five pure motor sub-modes, two input power-split sub-modes, a composite power-split mode, and five regenerative braking sub-modes. In the pure electric mode, the present invention effectively reduces the power level of the motor, reduces the size of the motor; and improves the gradeability performance of the complete vehicle in the pure electric mode, and improves the low-speed performance of the complete vehicle in the pure electric mode. In the power split mode, on the one hand, the present invention increases the high-efficiency range of the hybrid power system, effectively avoids the generation of parasitic power, and improves the economy of the vehicle; The acceleration performance and climbing performance of the vehicle on a straight road. In the regenerative braking mode, the present invention effectively improves the braking energy recovery ratio of the whole vehicle.

Contents of the invention

The present invention provides a planetary hybrid dual-mode vehicle to overcome the problems of limited climbing ability and poor low-speed performance of the vehicle in the pure electric mode, as well as the problem of parasitic power generated by the vehicle in the high-speed area and the reduction of the overall efficiency of the vehicle. Hybrid vehicle drive system.

In order to solve the above-mentioned technical problems, the present invention is realized by adopting the following technical solutions, in conjunction with the accompanying drawings: The drive system of a planetary hybrid dual-mode hybrid vehicle includes an engine 1, a front planetary row and a rear planetary row, the The system also includes No. 1 motor 4, No. 1 clutch 8, No. 2 clutch 10, overrunning clutch 11, No. 2 motor 12, brake 17 and backstop 21; The frame 7 is an integral structure, the driven part of the No. 1 clutch 8 is fixedly connected to the left end of the rear planetary ring gear 16, and rotates together with the rear planetary ring gear 16; the active part of the No. 2 clutch 10 is connected with the front planetary ring gear 9 As an integral structure, the driven part of the No. 2 clutch 10 is fixedly connected to the left end of the rear planetary carrier 15 and rotates together with the rear planetary carrier 15; Connected together, the inner race is fixedly connected with the rear planetary sun gear 13; the outer race of the backstop 21 is fixed on the vehicle frame or load-bearing body, and the inner race is fixedly connected with the power input shaft 3; the active part of the brake 17 Part of the structure is integrated with the rear planetary gear ring gear 16, and the driven part of the brake 17 is fixed on the vehicle frame; the front planetary row is sleeved on the power input shaft 3 for rotational connection, and the front planetary row carrier 7 is connected to the power input shaft 3. Spline connection; the rear planetary row set on the output shaft of No. 2 motor 12 is a rotational connection, and the rear planetary row sun gear 13 and the output shaft of No. 2 motor 12 are connected by spline pair; the shell of No. 1 motor 4 is fixed On the frame or load-bearing body, the rotor of the No. 1 motor 4 is set on the right end of the power input shaft 3, and is connected with the front planetary sun gear 5 as a spline pair; the casing of the No. 2 motor 12 is fixed on the frame or load-bearing. On the type vehicle body, the output shaft of No. 2 motor 12 is connected with the rear planetary sun gear 13 by a spline pair.

According to a planetary series dual-mode hybrid vehicle drive system provided by the present invention, the power input shaft 3, the front planetary row, the rear planetary row, the first clutch 8, the second clutch 10, the overrunning clutch 11, and the brake 17 , the backstop 21, the axis of rotation of the No. 1 motor 4 and the No. 2 motor 12 are collinear.

According to a planetary series dual-mode hybrid vehicle drive system provided by the present invention, the active part of the No. 1 clutch 8 is integrated with the front planetary carrier 7, and the driven part is fixedly connected to the rear planetary ring gear the left end of 16; the active part of the No. 2 clutch 10 is integrated with the front planetary ring gear 9, and the driven part of the No. 2 clutch 10 is fixedly connected to the left end of the rear planetary carrier 15; the overrunning clutch 11 is a one-way clutch, The outer race of the overrunning clutch 11 is fixedly connected with the active part of the second clutch 10, and the inner race is fixedly connected with the rear planetary sun gear 13; the backstop 21 is a one-way clutch, and the outer race of the backstop 21 Fixed on the frame or load-bearing body, the inner race is fixedly connected with the power input shaft 3; by controlling the engagement or separation of the first clutch 8 and the second clutch 10, and through the automatic engagement or overrunning of the overrunning clutch 11, multiple According to the different ways of power splitting, the power splitting mode is divided into input power splitting mode and composite power splitting mode, and the input power splitting mode also includes input power splitting mode I and input power splitting mode II. Seed mode: through the automatic backstop function of the backstop 21, the reverse rotation of the engine 1 is prevented.

According to a planetary series dual-mode hybrid vehicle drive system provided by the present invention, the brake 17 includes an active part and a driven part, the active part and the rear planetary ring gear 16 are integrally structured, and the driven part is fixed on On the frame or load-bearing body; by engaging the active part and the driven part of the brake 17, the pure electric mode and the regenerative braking mode are realized.

According to a planetary hybrid dual-mode hybrid vehicle drive system provided by the present invention, the No. 1 motor 4 is a permanent magnet synchronous motor, and the housing of the No. 1 motor 4 is fixed on the vehicle frame or load-bearing body. The output shaft is a hollow shaft, supported on the optical axis of the power input shaft 3 through bearings, and the motor rotor is splined to the front planetary sun gear 5; the No. 1 motor 4 is used to decouple the engine under different working conditions 1 and the rotation speed between the wheels, so that the rotation speed of the engine 1 is independent of the rotation speed of the wheels, and cooperate with the second motor 12 to decouple the torque between the engine 1 and the wheels; the second motor 12 is a permanent magnet synchronous motor, The housing of No. 2 motor 12 is fixed on the automobile frame or the load-bearing body, the motor output shaft is supported on the groove part of the rear planetary sun gear 13 through bearings, and the motor rotor is connected with the rear planetary sun gear 13 by splines; The No. 2 motor 12 has a high torque output characteristic, which can increase or supplement the torque from the engine 1 on the drive axle of the whole vehicle to meet the road torque requirement.

According to a planetary series dual-mode hybrid vehicle drive system provided by the present invention, the front planetary row includes a front planetary row sun gear 5, a front planetary row planetary wheel 6, a front planetary row carrier 7, and a front planetary row gear ring 9; the front planetary row sun gear 5, the front planetary row planetary gear 6, and the front planetary row ring gear 9 are meshed in turn, and the front planetary row carrier 7 is rotationally connected with the front planetary row planetary gear 6; The planetary carrier 7 is integrated with the active part of the No. 1 clutch 8, and the front planetary ring gear 9 is integrated with the active part of the No. 2 clutch 10.

According to a planetary series dual-mode hybrid vehicle drive system provided by the present invention, the rear planetary row includes a rear planetary row sun gear 13, a rear planetary row planetary wheel 14, a rear planetary row carrier 15, a rear planetary row gear ring 16; the rear planetary row sun gear 13, the rear planetary row planetary gear 14, and the rear planetary row ring gear 16 are meshed sequentially, and the rear planetary row carrier 15 is rotationally connected with the rear planetary row planetary gear 14; The planetary sun gear 13 is fixedly connected to the inner race of the overrunning clutch 11, the rear planetary planet carrier 15 and the driven part of the No. It has an integral structure with the active part of the brake 17.

The drive system of a planetary series dual-mode hybrid vehicle is divided into a pure electric mode, an input power split mode, a compound power split mode and a regenerative braking mode. Among them, the pure electric mode is divided into five sub-modes according to the power source and input mode: pure electric mode I, pure electric mode II, pure electric mode III, pure electric mode IV and pure electric mode V; Different transmission paths are divided into two sub-modes: input power split mode I and input power split mode II; similarly, the regenerative braking mode is divided into five regenerative braking sub-modes corresponding to the pure electric mode.

Compared with the prior art, the present invention has the beneficial effects as follows:

1. A planetary series dual-mode hybrid vehicle drive system according to the present invention can realize five pure electric sub modes through different engagement states of clutches and brakes, eliminate the idling fuel consumption of the engine, and improve the fuel economy of the whole vehicle , reduce harmful gas emissions, and reduce environmental pollution; at the same time, effectively reduce the power level and size of the motor, improve the gradeability of the vehicle in pure electric mode, and improve the low-speed performance of the vehicle.

2. The drive system of a planetary hybrid dual-mode hybrid vehicle according to the present invention can realize the input power splitting mode I by engaging the No. 2 clutch and brake. The best fuel economy zone, reducing the fuel consumption of the vehicle.

3. The drive system of a planetary hybrid dual-mode hybrid vehicle according to the present invention can realize the input power split mode II by engaging the overrunning clutch and the brake. Driving torque provides better vehicle dynamics.

4. A planetary hybrid dual-mode hybrid vehicle drive system according to the present invention can realize the composite power split mode by engaging the No. 1 clutch and the No. 2 clutch. In the best fuel economy zone.

5. A planetary series dual-mode hybrid vehicle drive system according to the present invention can realize five regenerative braking sub-modes through different engagement states of clutches and brakes. According to the different braking requirements and operating status of the vehicle, the braking energy can be effectively recovered to ensure that the braking strength meets the braking requirements, and the fuel economy of the vehicle can be significantly improved.

6. The drive system of a planetary hybrid dual-mode hybrid vehicle according to the present invention can reduce the frequency and strength of mechanical brakes, prolong their service life, and reduce their repair and maintenance costs.

7. The drive system of a planetary series dual-mode hybrid vehicle according to the present invention can use a relatively small power engine to meet the normal driving requirements of the vehicle, reduce harmful gas emissions, and reduce environmental pollution.

8. A planetary series dual-mode hybrid vehicle drive system according to the present invention can select the No. 2 motor with a smaller peak torque under the condition of outputting the same driving force, which reduces the dependence of the system on the motor .

9. The driving system of a planetary hybrid dual-mode hybrid vehicle described in the present invention has a wide range of applications, not only for passenger cars, but also for commercial vehicles, especially city buses, Buses and large trucks.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing:

Fig. 1 is a structural principle diagram of a planetary hybrid dual-mode hybrid vehicle drive system according to the present invention;

Fig. 2 is a rod model diagram of a planetary hybrid dual-mode hybrid vehicle drive system according to the present invention;

Fig. 3 is a structural principle diagram of a planetary hybrid dual-mode hybrid vehicle drive system in pure electric mode I according to the present invention;

Fig. 4 is a rod model diagram of a planetary hybrid dual-mode hybrid vehicle drive system in pure electric mode I according to the present invention;

Fig. 5 is a structural principle diagram of a planetary hybrid dual-mode hybrid vehicle drive system in pure electric mode II according to the present invention;

6 is a rod model diagram of a planetary hybrid dual-mode hybrid vehicle drive system in pure electric mode II according to the present invention;

Fig. 7 is a structural principle diagram of a planetary hybrid dual-mode hybrid vehicle drive system in pure electric mode III according to the present invention;

Fig. 8 is a rod model diagram of a planetary hybrid dual-mode hybrid vehicle drive system in pure electric mode III according to the present invention;

Fig. 9 is a structural principle diagram of a planetary hybrid dual-mode hybrid vehicle drive system in pure electric mode IV according to the present invention;

Fig. 10 is a rod model diagram of a planetary hybrid dual-mode hybrid vehicle drive system in pure electric mode IV according to the present invention;

Fig. 11 is a structural principle diagram of a planetary hybrid dual-mode hybrid vehicle drive system in pure electric mode V according to the present invention;

Fig. 12 is a rod model diagram of a planetary hybrid dual-mode hybrid vehicle drive system in pure electric mode V according to the present invention;

Fig. 13 is a structural principle diagram of a planetary hybrid dual-mode hybrid vehicle drive system in input power split mode I according to the present invention;

Fig. 14 is a rod model diagram of a planetary hybrid dual-mode hybrid vehicle drive system in input power split mode I according to the present invention;

Fig. 15 is a structural principle diagram of a planetary hybrid dual-mode hybrid vehicle drive system in input power split mode II according to the present invention;

Fig. 16 is a rod model diagram of a planetary hybrid dual-mode hybrid vehicle drive system in input power split mode II according to the present invention;

Fig. 17 is a structural principle diagram of a planetary hybrid dual-mode hybrid vehicle drive system in the compound power split mode according to the present invention;

Fig. 18 is a rod model diagram of a planetary hybrid dual-mode hybrid vehicle drive system in the composite power split mode according to the present invention;

In the figure: 1. engine, 2. torsional shock absorber, 3. power input shaft, 4. No. 1 motor, 5. front planetary row sun gear, 6. front planetary row planetary gear, 7. front planetary row carrier, 8. No. 1 clutch, 9. Front planetary ring gear, 10. No. 2 clutch, 11. Overrunning clutch, 12. No. 2 motor, 13. Rear planetary sun gear, 14. Rear planetary planetary gear, 15. Rear Planetary planet carrier, 16. rear planetary ring gear, 17. brake, 18. output gear, 19. power output shaft, 20. drive axle, 21. backstop.

detailed description

The present invention is described in detail below in conjunction with accompanying drawing:

Referring to Fig. 1 and Fig. 2, the present invention provides a planetary series dual-mode hybrid vehicle drive system, the planetary series dual-mode hybrid vehicle drive system mainly includes an engine, a front planetary row, a rear planetary row , No. 1 clutch, No. 2 clutch, overrunning clutch, backstop, brake, No. 1 motor and No. 2 motor.

Referring to FIG. 1 and FIG. 2 , the front planetary row includes a power input shaft 3 , a front planetary row sun gear 5 , a front planetary row planetary wheel 6 , a front planetary row carrier 7 , and a front planetary row ring gear 9 .

Referring to Fig. 1 and Fig. 2, the power input shaft 3 is a stepped shaft structure, the left end has an external spline for transmitting power from the engine 1 through the torsional damper 2 and the backstop 21, and the right end is passed through the spline or Other forms transmit power to the front planetary planet carrier 7; the front planetary sun gear 5 is a cylindrical gear structure; the front planetary planetary gear 6 is a cylindrical gear structure; the front planetary planetary carrier 7 It is a ring structure, integrated with the active part of the No. 1 clutch 8; the front planetary gear ring 9 is a cylindrical internal gear structure, integrated with the active part of the No. The race or inner race is fixedly connected.

Referring to Fig. 1 and Fig. 2, the left end of the power input shaft 3 is supported on the output end of the torsional shock absorber 2 through a bearing, the right end is supported in the groove of the front planetary carrier 7 through a bearing, and the inner part of the backstop 21 is passed through the key. The seat ring is fixedly connected; the front planetary row sun gear 5 is supported on the optical axis of the power input shaft 3 through bearings, and is in constant mesh with the front planetary row planetary gear 6; the front planetary row planetary gear 6 is respectively connected to the front planetary row sun gear 5 and the front The planetary ring gear 9 is in constant mesh; the front planetary planet carrier 7 is connected with the front planetary planetary gear 6 through a pin shaft, and revolves around the front planetary sun gear 5 .

Referring to FIG. 1 and FIG. 2 , the rear planetary row includes a rear planetary row sun gear 13 , a rear planetary row planetary wheel 14 , a rear planetary row carrier 15 , and a rear planetary row ring gear 16 .

Referring to Fig. 1 and Fig. 2, the described rear planetary row sun gear 13 is a cylindrical gear structure, which is fixedly connected with the inner race or outer race of the overrunning clutch 11, and an inner spline is arranged inside for transmitting transmission from the second motor 12. The power; the rear planetary planetary gear 14 is a cylindrical gear structure; the rear planetary planetary carrier 15 is a ring structure, and the driven part of the second clutch 10 is an integral structure, and the rear planetary planetary carrier 15 The right end is a cylindrical external gear structure; the rear planetary ring gear 16 is a cylindrical internal gear structure, which is integrated with the driven part of the No. 1 clutch 8 and the active part of the brake 17.

Referring to Fig. 1 and Fig. 2, the rear planetary row sun gear 13 is supported on the optical axis portion of the output shaft of No. 2 motor 12 through bearings, and is in constant mesh with the rear planetary row planetary gear 14; The wheel 13 is in constant mesh with the rear planetary ring gear 16; the rear planetary planet carrier 15 is connected with the rear planetary planetary gear 14 through a pin shaft, and revolves around the rear planetary sun gear 13, and the right end external gear of the rear planetary planetary carrier 15 It is constantly meshed with the output gear 18 and transmits the power to the drive axle 20 through the output gear 18 .

Referring to FIG. 1 and FIG. 2 , the clutch system includes a No. 1 clutch 8 , a No. 2 clutch 10 , an overrunning clutch 11 , and a backstop 21 .

Referring to Fig. 1 and Fig. 2, the No. 1 clutch 8 is a multi-plate friction clutch, its active part is integrated with the front planetary carrier 7, and the driven part is fixedly connected with the rear planetary ring gear 16. The No. 1 clutch 8 is engaged by friction; the No. 2 clutch 10 is a multi-plate friction clutch, its active part is integrated with the front planetary ring gear 9, and the driven part is fixedly connected with the rear planetary carrier 15. The No. 2 clutch 10 is engaged by friction; the overrunning clutch 11 is a one-way clutch, and the outer race and the inner race are respectively fixed to the shaft extension at the right end of the front planetary ring gear 9 and the shaft extension at the left end of the rear planetary sun gear 13 Connection, the engagement and overrunning state of the overrunning clutch 11 is realized by adjusting the rotational speed and rotation direction of the front planetary ring gear 9 and the rear planetary sun gear 13; the backstop 21 is a one-way clutch, and the outer race is fixed on the outer box Or on the vehicle frame, the inner race is fixedly connected with the power input shaft 3 through a key connection, and the reverse stop and separation state of the backstop 21 are realized by changing the rotation direction of the power input shaft 3 .

Referring to Fig. 1 and Fig. 2, the brake 17 is a multi-disc friction brake, its active part is integrated with the rear planetary gear ring 16, and the driven part is fixed on the vehicle frame or load-bearing body, through friction to engage the brake 17.

Referring to FIG. 1 , FIG. 9 , and FIG. 11 , the motor system includes a No. 1 motor 4 and a No. 2 motor 12 .

Referring to Fig. 1, Fig. 9, Fig. 11, described No. 1 motor 4 is a permanent magnet synchronous motor, and the housing of No. 1 motor 4 is fixed on the vehicle frame or the load-bearing body, and the output shaft of the motor is a hollow shaft. Supported on the optical axis of the power input shaft 3, the motor rotor is connected to the front planetary sun gear 5 through splines or other forms; the No. 1 motor 4 is used for decoupling between the engine 1 and the wheels under different working conditions The rotation speed of the engine 1 is independent of the rotation speed of the wheels. Cooperating with the second motor 12 to decouple the torque between the engine 1 and the wheels, the engine 1 can be ensured to work in a high-efficiency area, so as to improve the fuel economy of the vehicle. The No. 2 motor 12 is a permanent magnet synchronous motor. The housing of the No. 2 motor 12 is fixed on the vehicle frame or the load-bearing body, and the output shaft of the motor is supported on the groove part of the rear planetary sun gear 13 through bearings. The rotor is connected to the rear planetary sun gear 13 through splines or other forms; the second motor 12 has high torque output characteristics and can increase or supplement the torque from the engine 1 on the drive axle of the vehicle to meet the road torque demand, that is, Decoupling the torque output of the engine 1 from the road surface demand torque removes the limitation of the engine 1 torque by the road surface demand torque caused by the mechanical connection between the engine 1 and the drive shaft of the vehicle.

Working principle and working mode division

Referring to Fig. 1, Fig. 2, described a kind of planetary series dual-mode hybrid electric vehicle driving system has three power inputs, is engine 1, No. 1 electric machine 4 and No. 2 electric machine 12 respectively; The power of engine passes power input shaft 3 input, the power of the No. 1 motor 4 is input through the front planetary sun gear 5, and the power of the No. 2 motor 12 is input through the rear planetary sun gear 13.

1. Pure electric mode

Referring to Figures 1 to 12, in the pure electric mode, the engine 1 is in the off state, the brake 17 is in the engaged state, the No. 1 clutch 8 is in the disengaged state, and the No. 1 motor 4 and the No. 2 motor 12 are in the electric or off state; The different engagement states of the first clutch 10, the overrunning clutch 11 and the backstop 21, as well as the working state of the motor system, thereby realizing five pure rotor modes.

Pure electric mode Ⅰ

Referring to Figure 3 and Figure 4, the pure electric mode I can be called the second motor alone driving mode, which is mainly used for starting the vehicle and cruising at low speed. In the pure electric mode I, only the No. 2 motor 12 is in the electric state, and the power is input by the rear planetary sun gear 13, and finally output by the output gear 18 through the rear planetary planet carrier 15; The clutches 10 are all in the disengaged state, and the overrunning clutch 11 is in the overrunning state, preventing the power from being output to the front planetary row, and avoiding the large magnetic field weakening loss of the No. 1 motor 4 .

Pure electric mode Ⅱ

Referring to Fig. 5 and Fig. 6, the pure electric mode II can be called the low-speed single-drive mode of the No. 1 motor, which is mainly used for pure electric starting and climbing conditions. In the pure electric mode II, the No. 1 motor 4 is in the electric state, the No. 1 clutch 8 and the No. 2 clutch 10 are both in the disengaged state, the overrunning clutch 11 is in the engaged state, and the backstop 21 is in the backstop state. The power is input by the front planetary row sun gear 5, and after two times of deceleration and torque increase by the front planetary row and the rear planetary row, the power is finally output by the rear planetary row carrier 15.

Pure electric mode Ⅲ

Referring to Fig. 7 and Fig. 8, the pure electric mode III can be called the high-speed single-drive mode of the No. 1 motor, which is mainly used in pure electric high-speed cruising conditions. In pure electric mode III, the No. 1 motor 4 is in the electric state, the No. 1 clutch 8 is in the disengaged state, the No. 2 clutch 10 is in the engaged state, the overrunning clutch 11 is in the overrunning state, and the backstop 21 is in the backstop state. Power is input by the front planetary row sun gear 5, and after the deceleration and torque increase of the front planetary row, the power is directly output by the rear planetary row carrier 15.

Pure electric mode Ⅳ

Referring to Fig. 9 and Fig. 10, the pure electric mode IV can be called the dual-motor low-speed combined drive mode, which is mainly used for high-torque pure electric starting conditions and large gradient conditions. In pure electric mode IV, the No. 1 motor 4 and the No. 2 motor 12 are both in the electric state, the No. 1 clutch 8 and the No. 2 clutch 10 are both in the disengaged state, the overrunning clutch 11 is in the engaged state, and the backstop 21 is in the backstop state . The power of the front row is provided by the No. 1 motor 4, which is input by the front planetary row sun gear 5, and is output to the rear planetary row sun gear 13 after the deceleration and torque increase of the front planetary row; the output power of the front planetary row is output by the No. 2 motor 12 The power is superimposed in parallel at the rear planetary row sun gear 13, and after the deceleration and torque increase of the rear planetary row, the power is directly output from the rear planetary row carrier 15.

Pure electric mode Ⅴ

Referring to Fig. 11 and Fig. 12, the pure electric mode V can be called the dual-motor high-speed combined drive mode, which is mainly used for pure electric mid-to-high speed cruising conditions. In the pure electric mode V, the No. 1 motor 4 and the No. 2 motor 12 are both in the electric state, the No. 1 clutch 8 is in the disengaged state, the No. 2 clutch 10 is in the engaged state, the overrunning clutch 11 is in the overrunning state, and the backstop 21 is in the reverse state. stop state. The power of the front row is provided by the No. 1 motor 4, which is input by the front planetary row sun gear 5, and is output to the rear planetary row carrier 15 after the deceleration and torque increase of the front planetary row; the output power of the No. 2 motor 12 is provided by the rear planetary row sun gear 5. The input of wheel 13 is output to the rear planetary carrier 15 after the deceleration and torque increase of the rear planetary row.

2. Input power split mode

Referring to Fig. 1, Fig. 2, Fig. 13 and Fig. 15, in the input power split mode, the engine 1 is in the working state, the No. 1 motor 4 is in the generating state, and the No. 2 motor 12 is in the electric state; The brake 17 is engaged; the input power split sub-mode can be divided into input power split mode I and input power split mode II according to the engagement of the second clutch 10 and the overrunning clutch 11 .

Input Power Split Mode I

Referring to Fig. 1, Fig. 2, Fig. 13, and Fig. 14, the input power split mode I can be called the conventional low-speed mode, which is generally used in conventional low-speed working conditions with low power requirements. In the input power splitting mode I, the No. 2 clutch 10 and the brake 17 are in the engaged state, the No. 1 clutch 8 is in the disengaged state, and the overrunning clutch 11 is in the overrunning state. The output power of the engine 1 is divided into two parts, one part is output to the rear planetary carrier 15 through the front planetary ring gear 9; the other part is output to the No. 1 motor 4 through the front planetary sun gear 5. The No. 1 motor 4 is in the power generation state, and converts the power transmitted by the engine 1 into electric energy, and the electric energy is transmitted to the No. 2 motor 12 and the battery through the electric path. No. 2 motor 12 is in the electric state, converts the power transmitted by No. 1 motor 4 and the battery into mechanical energy, passes through the rear planetary row sun gear 13, and finally outputs to the rear planetary row planet carrier 15; the mechanical energy output by engine 1 and No. 2 motor 12 Combined in parallel at the rear planet carrier 15 , and finally output to the drive axle 20 through the output gear 18 .

Input Power Split Mode II

Referring to Fig. 1, Fig. 2, Fig. 15, and Fig. 16, the input power split mode II can be called the torque-increasing low-speed mode, which is generally used in high power requirements, especially in climbing or rapid acceleration conditions with a large slope. In the input power split mode II, the overrunning clutch 11 and the brake 17 are in the engaged state, and the first clutch 8 and the second clutch 10 are both in the disengaged state. The output power of the engine 1 is divided into two parts, one part is output to the rear planetary sun gear 11 through the front planetary ring gear 9; the other part is output to the No. 1 motor 4 through the front planetary sun gear 5. The No. 1 motor 4 is in the power generation state, and converts the power transmitted by the engine 1 into electric energy, and the electric energy is transmitted to the No. 2 motor 12 and the battery through the electric path. No. 2 motor 12 is in electric state, converts the power transmitted by No. 1 motor 4 and the battery into mechanical energy, and outputs it to the rear planetary sun gear 13; the mechanical energy output by engine 1 and No. 2 motor 12 passes through the rear planetary sun gear 13 Combined in a parallel manner, after the deceleration and torque increase of the rear planetary row, the output is output from the rear planetary row carrier 15 , and finally output to the drive axle 20 through the output gear 18 .

3. Composite power split mode

Referring to Fig. 1, Fig. 2, Fig. 17, and Fig. 18, the compound power split mode can be called a high-speed mode. Under high-speed conditions, the No. 1 clutch 8 and the No. 2 clutch 10 are engaged, the overrunning clutch 11 is in the overrunning state, and the brake 17 is in the overrunning state. Separated state, so as to realize the compound power split mode, the system can obtain higher comprehensive efficiency of the whole vehicle. In the composite power split mode, the engine is in the working state, the No. 1 motor 4 is in the power generation or electric power state, and the No. 2 motor 12 is in the electric power generation or power generation state. The output power of the engine 1 and the output power of the No. 1 motor 4 are coupled in the front planetary row, and are transmitted to the rear planetary ring gear 16 and the rear planetary carrier 15 of the rear planetary row through the No. 1 clutch 8 and the No. 2 clutch 10 The output power of the second motor 12 and the power transmitted by the front planetary row are coupled at the rear planetary row, and finally output to the drive axle 20 through the engagement of the right end external gear part of the rear planetary row carrier 15 and the output gear 18. In the composite power splitting mode, the output power of the No. 1 motor 4 and the No. 2 motor 12 can be divided into positive power and negative power. No. 1 motor 4 and No. 2 motor 12 are controlled by a motor controller.

4. Regenerative braking mode

Referring to Figures 1 to 12, in the regenerative braking mode, the engine 1 is in the shutdown state, the brake 17 is in the engaged state, the No. 1 clutch 8 is in the disengaged state, and the No. 1 motor 4 and the No. 2 motor 12 are in the power generation or shutdown state; The different engagement states of the second clutch 10, the overrunning clutch 11, and the backstop 21, as well as the working state of the motor system, realize five sub-modes of regenerative braking.

Referring to Figures 1 to 12, under regenerative braking conditions, the vehicle controller calculates, judges and arbitrates factors such as braking strength, state of charge, and vehicle speed information to determine which regenerative braking mode the vehicle is in. model. If the car is in a non-emergency braking situation, the vehicle speed is higher than a certain limit value, and the required torque at this time is less than the maximum braking torque that the motor system can provide, all the braking force is provided by the motor system, which converts mechanical energy into electrical energy and store it in the battery; if the car is in a non-emergency braking situation, the vehicle speed is higher than a certain limit value, and the required torque at this time is greater than the maximum braking torque that the motor system can provide, Part of the braking force is provided by the electric motor system, which converts mechanical energy into electrical energy and stores it in the battery, and the other part of the braking force is provided by traditional mechanical brakes.

Claims (7)

1. A planetary hybrid dual-mode hybrid vehicle drive system, comprising an engine (1), a front planetary row and a rear planetary row, characterized in that the planetary hybrid dual-mode hybrid vehicle drive system also includes No. 1 motor (4), No. 1 clutch (8), No. 2 clutch (10), overrunning clutch (11), No. 2 motor (12), brake (17) and backstop (21); The active part of the No. 1 clutch (8) is integrally structured with the front planetary carrier (7), and the driven part of the No. 1 clutch (8) is fixedly connected to the left end of the rear planetary ring gear (16). The rear planetary ring gear (16) rotates together; the active part of the No. 2 clutch (10) is integrally structured with the front planetary ring gear (9), and the driven part of the No. 2 clutch (10) is fixedly connected to the rear planetary row The left end of the frame (15) rotates with the rear planetary carrier (15); the outer race of the overrunning clutch (11) is fixedly connected with the active part of the No. 2 clutch (10), and the inner race is connected with the rear planetary The sun gear (13) is fixedly connected; the outer race of the backstop (21) is fixed on the vehicle frame or load-bearing body, and the inner race is fixedly connected with the power input shaft (3); the active part of the brake (17) is connected with the rear The planetary ring gear (16) has an integrated structure, and the driven part of the brake (17) is fixed on the vehicle frame or load-bearing body; the front planetary row is set on the power input shaft (3) for rotational connection, and the front planetary row planetary carrier (7) It is fixedly connected with the power input shaft (3); the rear planetary row is sleeved on the output shaft of the No. The shaft is fixedly connected; the housing of the No. 1 motor (4) is fixed on the vehicle frame or the load-bearing body, and the rotor of the No. 1 motor (4) is sleeved on the right end of the power input shaft (3), and the front planetary sun gear ( 5) It is fixedly connected; the housing of the No. 2 motor (12) is fixed on the vehicle frame or the load-bearing body, and the output shaft of the No. 2 motor (12) is fixedly connected with the rear planetary row sun gear (13). 2. According to claim 1, a planetary series dual-mode hybrid vehicle drive system is characterized in that the power input shaft (3), the front planetary row, the rear planetary row, and the No. 1 clutch (8 ), No. two clutch (10), overrunning clutch (11), brake (17), backstop (21), No. one motor (4) and the axis of revolution of No. two motor (12) are collinear. 3. A planetary series dual-mode hybrid vehicle drive system according to claim 1, characterized in that the active part of the No. 1 clutch (8) is integrated with the front planetary carrier (7) structure, the driven part is fixedly connected to the left end of the rear planetary ring gear (16); the active part of the second clutch (10) is integrated with the front planetary ring gear (9), and the driven part of the second clutch (10) The part is fixedly connected to the left end of the rear planetary row carrier (15); the overrunning clutch (11) is a one-way clutch, and the outer race of the overrunning clutch (11) is fixedly connected with the driving part of the No. 2 clutch (10), and the inner The seat ring is fixedly connected with the rear planetary row sun gear (13); the backstop (21) is a one-way clutch, and the outer race of the backstop (21) is fixed on the vehicle frame or the load-bearing body, and the inner race is connected with the power The input shaft (3) is fixedly connected; by controlling the engagement or disengagement of the No. 1 clutch (8) and No. 2 clutch (10), and through the automatic engagement or overrun of the overrunning clutch (11), the power splitting mode among various modes is realized. Conversion; according to the different ways of power splitting, the power splitting mode is divided into input power splitting mode and composite power splitting mode, and the input power splitting mode also includes two sub-modes: input power splitting mode I and input power splitting mode II; through the backstop The automatic backstop function of (21) prevents the reverse rotation of the engine (1). 4. A planetary series dual-mode hybrid vehicle drive system according to claim 1, characterized in that said brake (17) includes a driving part and a driven part, and the driving part and the rear planetary gear The ring (16) is an integral structure, and the driven part is fixed on the vehicle frame or load-bearing body; by engaging the active part and the driven part of the brake (17), pure electric mode and regenerative braking mode are realized. 5. According to the drive system of a kind of planetary series dual-mode hybrid vehicle according to claim 1, it is characterized in that, the No. 1 motor (4) is a permanent magnet synchronous motor, and the shell of the No. 1 motor (4) The body is fixed on the vehicle frame or load-bearing body, the output shaft of the motor is a hollow shaft, and is supported on the optical axis part of the power input shaft (3) through a bearing, and the motor rotor is fixedly connected with the front planetary row sun gear (5); The No. 1 motor (4) is used to decouple the rotation speed between the engine (1) and the wheels under different working conditions, so that the rotation speed of the engine (1) is independent of the rotation speed of the wheels, and cooperates with the No. 2 motor (12) to control the engine ( 1) Torque decoupling between the wheels; the No. 2 motor (12) is a permanent magnet synchronous motor, and the housing of the No. 2 motor (12) is fixed on the automobile frame or the load-bearing body, and the output shaft of the motor The motor rotor is fixedly connected with the rear planetary sun gear (13) through bearing support on the groove part of the rear planetary sun gear (13); the No. 2 motor (12) has high torque output characteristics and can be added or supplemented The torque from the engine (1) on the drive axle of the whole vehicle meets the torque requirement of the road surface. 6. A planetary series dual-mode hybrid vehicle drive system according to claim 1, wherein said front planetary row comprises a front planetary row sun gear (5), a front planetary row planetary wheel (6 ), the front planetary row planet carrier (7), the front planetary row ring gear (9); the front planetary row sun gear (5), the front planetary row planetary gear (6), the front planetary row ring gear (9) in turn meshing, the front planetary planet carrier (7) is rotationally connected with the front planetary planetary wheel (6); the front planetary planetary carrier (7) and the active part of the No. 1 clutch (8) are integrally structured, and the front planetary planetary The active part of row ring gear (9) and No. 2 clutch (10) is integral structure. 7. A planetary series dual-mode hybrid vehicle drive system according to claim 1, wherein said rear planetary row comprises a rear planetary row sun gear (13), a rear planetary row planetary wheel (14 ), rear planetary row carrier (15), rear planetary ring gear (16); described rear planetary row sun gear (13), rear planetary row planetary gear (14), rear planetary row ring gear (16) in turn meshing, the rear planetary row carrier (15) is rotationally connected with the rear planetary row planetary gear (14); the rear planetary row sun gear (13) is fixedly connected with the inner race of the overrunning clutch (11), and the rear planetary row The driven part of the star carrier (15) and the No. 2 clutch (10) is fixedly connected together, and the driven part of the rear planetary ring gear (16) and the No. 1 clutch (8) and the active part of the brake (17) are One structure.