阅读说明：本技术 一种两段式双电机混合动力自动变速器 (Two segmentation bi-motor hybrid automatic gearbox ) 是由 李吉元 石彦辉 卜树峰 丁桂杰 张海全 程鑫 巍然 柳泓蛰 于 2020-05-13 设计创作，主要内容包括：本发明提供了一种两段式双电机混合动力自动变速器,包括输入轴、输出轴、两个动力电机、三个行星排、两个离合器和两个制动器；动力电机具备驱动、发电模式；输入轴通过第一离合器与第一行星排框架连接,同时第一行星排框架通过第一制动器与变速器箱体连接实现制动,第一行星排齿圈与第二行星排框架连接,并通过第二离合器和第三行星排框架连接；第一行星排太阳轮和第二行星排齿圈均连接到第一动力电机；第二行星排太阳轮与第三行星太阳轮连接,并连接到第二动力电机；第三行星排框架与输出轴连接,第三行星排齿圈通过第二制动器和箱体相连实现制动。本发明能够实现在变速器运行过程中发动机停机节能。(The invention provides a two-section double-motor hybrid automatic transmission which comprises an input shaft, an output shaft, two power motors, three planet rows, two clutches and two brakes, wherein the input shaft is connected with the output shaft through the two power motors; the power motor has a driving mode and a power generation mode; the input shaft is connected with the first planet row frame through a first clutch, meanwhile, the first planet row frame is connected with the transmission box body through a first brake to realize braking, and the first planet row gear ring is connected with the second planet row frame and is connected with the third planet row frame through a second clutch; the first planet row sun gear and the second planet row gear ring are both connected to a first power motor; the second planet row sun gear is connected with the third planet sun gear and is connected to a second power motor; the third planet row frame is connected with the output shaft, and the third planet row gear ring is connected with the box body through a second brake to realize braking. The invention can realize the engine stop and energy saving in the running process of the transmission.)

1. A two-section double-motor hybrid automatic transmission is characterized by comprising an input shaft, an output shaft, two power motors, three planet rows, two clutches and two brakes; the power motor is provided with a driving mode and a power generation mode;

the input shaft is connected with the first planet row frame through a first clutch, meanwhile, the first planet row frame is connected with the transmission box body through a first brake to realize braking, and the first planet row gear ring is connected with the second planet row frame and is connected with the third planet row frame through a second clutch; the first planet row sun gear and the second planet row gear ring are both connected to a first power motor; the second planet row sun gear is connected with the third planet sun gear and is connected to a second power motor; the third planet row frame is connected with the output shaft, and the third planet row gear ring is connected with the box body through a second brake to realize braking;

seventeen working states of the automatic transmission are realized by combining or separating a brake and a clutch, and the third planetary row has two different output transmission ratios.

2. The two-stage dual-motor hybrid automatic transmission of claim 1, wherein the two power motors, the input shaft, and the output shaft are arranged on a same center line.

Technical Field

The invention relates to the technical field of machinery and vehicle transmission, in particular to a two-section type double-motor hybrid automatic transmission.

Background

A hydromechanical automatic transmission for a wheeled vehicle includes a planetary gear set, a clutch, a housing, and a hydraulic control system. The transmission may have a plurality of planetary rows, clutches, and internal rotating components.

Different speed ratios of the transmission are realized by controlling different clutches so as to adapt to the working speed ratio requirements of the transmission under different load conditions. The continuous change of the output speed can be realized through the coordination control of the internal combustion engine and the power motor, and the economical efficiency of the vehicle is improved.

The existing automatic transmission has no engine stop function in the operation process, part of mechanical energy absorbed from the whole machine can be consumed by the engine during energy recovery, and the engine belongs to a fuel consumption part. The existing automatic transmission can not realize the function of stopping and saving energy.

Disclosure of Invention

In view of this, the invention provides a two-stage dual-motor hybrid automatic transmission, which can realize engine stop and energy saving in the running process of the transmission.

The technical scheme adopted by the invention is as follows:

a two-section dual-motor hybrid automatic transmission comprises an input shaft, an output shaft, two power motors, three planet rows, two clutches and two brakes; the power motor is provided with a driving mode and a power generation mode;

the input shaft is connected with the first planet row frame through a first clutch, meanwhile, the first planet row frame is connected with the transmission box body through a first brake to realize braking, and the first planet row gear ring is connected with the second planet row frame and is connected with the third planet row frame through a second clutch; the first planet row sun gear and the second planet row gear ring are both connected to a first power motor; the second planet row sun gear is connected with the third planet sun gear and is connected to a second power motor; the third planet row frame is connected with the output shaft, and the third planet row gear ring is connected with the box body through a second brake to realize braking;

seventeen working states of the automatic transmission are realized by combining or separating a brake and a clutch, and the third planetary row has two different output transmission ratios.

Further, the two power motors, the input shaft and the output shaft are arranged on the same central line.

Has the advantages that:

the invention realizes the continuous change adjustment of three power inputs, namely the input of the engine and the input of the two power motors, so that the vehicle has the functions of energy output, energy recovery and pure electric drive of engine shutdown; after the engine is stopped, the transmission electric driving mode and the energy recovery mode do not affect the engine stop energy saving after the engine is stopped by operating the first brake connected with the first planet row frame. The third planet row has two different output transmission ratios, so that the two-stage power output function can be realized;

secondly, because the rotating speed of the power motor is high, the speed of the generator is low, the rotating speed ranges are different, and the rotating speed is limited, the power motor is connected with the first planet row sun gear, and the engine is connected with the first planet row frame, so that the power motor and the first planet row frame have good rotating speed matching performance and small volume, and can exert the advantages of respective working areas.

Drawings

FIG. 1 is a schematic diagram of the connection of the various parts of the two-section dual motor hybrid automatic transmission of the present invention;

the two-section type double-motor hybrid power automatic transmission comprises a 200-two-section type double-motor hybrid power automatic transmission body, a 201-transmission input shaft, a 202-transmission output shaft, a 205-first planet row, a 206-second planet row, a 207-third planet row, a 208-first power motor, a 209-second power motor, a 212-first planet row sun gear, a 213-first planet row frame, a 214-first planet row ring gear, a 216-second planet row sun gear, a 217-second planet row frame, a 218-second planet row ring gear, a 220-third planet row sun gear, a 221-third planet row frame, a 222-third planet row ring gear, a C1-first clutch, a C2-second clutch, a B1-first brake and a B2-second brake.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

The embodiment provides a two-stage dual-motor hybrid automatic transmission 200, as shown in fig. 1, which includes an input shaft 201 connected with an internal combustion engine, an output shaft 202 used for power output, a first planetary row 205, a second planetary row 206, a third planetary row 207, a first power motor 208, a second power motor 209, a first clutch C1, a second clutch C2, a first brake B1 and a second brake B2. The first power motor 208 and the second power motor 209 have a drive mode and a power generation mode, and have functions of both power input and power recovery.

One end of the input shaft is connected with a power source engine, the other end of the input shaft is connected with the first planet row frame through a first clutch, and meanwhile, the first planet row frame is connected with the transmission box body through a first brake to realize braking and become a first motor torque output fulcrum; the first planet row gear ring is connected with the second planet row frame and is connected with the third planet row frame through a second clutch; the first planet row sun gear and the second planet row gear ring are both connected to a first power motor to receive the energy output of the first motor or output the energy to the first motor to generate electricity; the second planet row sun gear is connected with the third planet row sun gear and is connected with a second power motor, and the second power motor can transmit energy to the second planet row and the third planet row; the third planet row frame is connected with the output shaft to complete the functions of energy confluence and power output, and the third planet row gear ring is connected with the box body through a second brake to realize braking. The first power motor 208, the second power motor 209, the input shaft and the output shaft are arranged on the same central line.

The two-stage dual-motor hybrid automatic transmission 200 can receive energy input in multiple ways, has an energy recovery function, and has a function of converting the energy of an internal combustion engine into electric energy to output. Under different running demand states of the vehicle, the vehicle has six driving modes of internal combustion engine driving, internal combustion engine motor coupling driving, internal combustion engine driving one power motor to generate power and the other power motor to drive output, double-power motor driving internal combustion engine stopping, single-power motor driving internal combustion engine stopping, one power motor generating power and the other power motor driving output internal combustion engine stopping. The engagement or disengagement of the first clutch C1 and the first brake B1 determines whether the internal combustion engine is operating, and determines the driving mode of the two-stage two-motor hybrid automatic transmission 200 under the control of an external controller.

The internal combustion engine is connected directly to the two-stage two-motor hybrid automatic transmission 200 or is connected to the input shaft 201 of the two-stage two-motor hybrid automatic transmission 200 through a torque converter; the input shaft 201 is connected to the first planetary row frame 213 of the first planetary row 205 through a first clutch C1. When the engine works, the first clutch C1 is engaged, and power is transmitted to the two-stage dual-motor hybrid automatic transmission 200 through the first clutch C1, at this time, a part of input mechanical energy can be transmitted to the first power motor M1 to be converted into electric energy, or all of the input mechanical energy can be transmitted to the first planet row ring gear 214 through the first planet row frame 213 and through the conversion of the first planet row 205, and is transmitted to the inside of the two-stage dual-motor hybrid automatic transmission 200 to be transmitted backwards; the two energy transfer modes are controllable and selectable by an external controller.

When the engine stops working in the running process, the first clutch C1 is released, the first brake B1 is combined, and the two power motors can convert electric energy into mechanical energy, output the mechanical energy to the first planet row ring gear 214 through the conversion of the first planet row 205 and transmit the mechanical energy into the two-segment double-motor hybrid automatic transmission 200. The first power motor M1 can also absorb the mechanical energy of the first planetary row 205, and the mechanical energy is converted into electric energy through the first planetary row sun gear 212, and the electric energy is output to the power system by the power motor M1 to be stored and generate electricity.

When the engine stops operating during operation, the first clutch C1 and the first brake B1 are released, the first planetary row 205 does not transmit power, and the two power motors output power to the second planetary row 206 through the second planetary row ring gear 218. The two power motors can also absorb mechanical energy through the second planet row ring gear 218 and convert the mechanical energy into electric energy.

When the first clutch C1 is engaged, the second clutch C2, the first brake B1 and the second brake B2 are released, the two-stage two-motor hybrid automatic transmission 200 is in a neutral state (for example, when the vehicle is started), and the first power motor M1 and the second power motor M2 work together to start the engine.

The first power motor M1 and the second power motor M2 have four working modes: the first power motor M1 and the second power motor M2 output mechanical energy together, and the mechanical energy is called a DD mode; the first power motor M1 outputs electric energy, and the second power motor M2 outputs mechanical energy, namely a GD mode; the first power motor M1 outputs mechanical energy, and the second power motor M2 outputs electric energy, which is called a DG mode; the first power motor M1 and the second power motor M2 output electric energy together, which is called GG mode.

Under different driving modes of the double motors, the third planetary row 207 can be in two different output transmission ratios, so the invention is called a two-stage hybrid transmission; when both the second brake B2 and the second clutch C2 are released, the two-stage two-motor hybrid automatic transmission 200 is in a neutral state; the second brake B2 is engaged and the second clutch C2 is released when the vehicle is running in a low speed state; the second brake B2 is released and the second clutch C2 is engaged while the vehicle is operating at a high speed. The engagement or disengagement of the second brake B2 and the second clutch C2 determines the output gear ratio.

In cooperation with the two-segment dual-motor hybrid automatic transmission 200, the third planetary gear set 207 can be in two different output transmission ratios, and the first power motor 208 and the second power motor 209 can selectively work in four modes, namely a DD mode, a GD mode, a DG mode and a GG mode, so that eight working states of the two-segment dual-motor hybrid automatic transmission 200 occur. And combining two conditions of whether the engine is stopped or not, sixteen working states of the transmission are realized, and seventeen working states are realized in addition to a neutral state.

To further illustrate the different operating states of the two-stage, two-motor hybrid automatic transmission 200, the K values of the first planetary row 205, the second planetary row 206, and the third planetary row 207 are exemplified as: 1.7, 2.5, 1.9; this results in a gear ratio of the third planet carrier sun gear 220 input to the third planet carrier frame 221 output to the output shaft 202 with the third planet carrier 207 braked as by the second clutch B2, i.e., a speed ratio of the third planet carrier sun gear 220 to the third planet carrier frame 221 of 2.9.

When the second clutch C2 is engaged and the second brake B2 is released, the same rotational speed of the first planet carrier 213 and the first planet sun gear 212 can obtain the speed ratio of 1.0 between the third planet carrier 221 and the third planet sun gear 220, i.e. the three planet carriers rotate integrally, and the output rotational speed of the two-stage dual-motor hybrid automatic transmission 200 is the same as that of the internal combustion engine, which is equivalent to the direct gear of the hydromechanical automatic transmission.

In the example, for illustrating the working mode of the invention, the working range of the engine is set within 600r/min to 2100r/min, and the working rotating speed ranges of the two power motors M1 and M2 are set within the reverse direction 16000r/min to the forward direction 16000 r/min.

When the first clutch C1 is engaged, the second clutch C2, the first brake B1 and the second brake B2 are released, and the transmission is in a neutral state. The vehicle is stopped by the entire vehicle brake and the third planetary row 207 does not transmit torque. When the second power motor M2 is in the power generation mode, the power generation rotation speed of the second power motor M2 affects the rotation speed of the first power motor M1. For example, when the internal combustion engine is operated at 1500r/min, the power generation rotation speed of the second power motor M2 is controlled to be 5600r/min in the forward direction, the first power motor M1 is operated at 600r/min in the forward direction, and is in a steady state, mechanical energy provided by the internal combustion engine is absorbed by the two power motors to generate power, and when the torque input to the input shaft 201 by the internal combustion engine is operated at 1000Nm, the first power motor M1 is operated in a power generation state, at the moment, the second power motor M2 is operated in a power generation state, and the power generation power of the second power motor M2 is about 2 times of the power generation power of the first power motor M1.

When the first clutch C1 and the second brake B2 are combined and the second clutch C2 and the first brake B1 are released, the transmission is in a low gear state, and the output shaft 202 of the two-section double-motor hybrid automatic transmission 200 needs to meet the requirement of starting and running of the whole vehicle. The third planetary row 207 begins to transmit torque. For example, when the engine works at 1500r/min, the rotating speed of the output shaft 202 is from 0 to 2100r/min, which corresponds to the driving rotating speed of the second power motor M2 being from 0 to 6090r/min, the second power motor M2 is in a driving state in the range, and the first power motor M1 is gradually transited from a driving state in the forward direction 1829r/min to a driving state in the forward direction 493 r/min.

When the first clutch C1 and the second clutch C2 are combined, the first brake B1 and the second brake B2 are released, the transmission is in a high gear state, and the output shaft of the hybrid power transmission needs to meet the requirement of high-speed running of the whole vehicle. The third planetary row 207 does not transmit torque. For example, when the engine works at 1500r/min, the rotating speed of the output shaft 202 is from 1500r/min to 2600r/min, which corresponds to the driving rotating speed of the second power motor M2, is from 1500 to 10025r/min, the first power motor M1 is from 1500r/min to 370r/min in the reverse direction, and by adjusting the state of the second power motor M2 in the range, the first power motor M1 can be in a power generation or driving state, so that the requirement of the whole vehicle is met.

When the first brake B1 and the second brake B2 are combined and the first clutch C1 and the second clutch C2 are released, the transmission is in a low gear state. The third planetary row 207 transmits torque. For example, the engine can be in a stop state at this time, and the transmission is in a pure electric state. The rotating speed of the output shaft 202 is from 0r/min to 1500r/min, the driving rotating speed of the second power motor M2 is from 0 to 4350r/min, the second power motor M2 can be in a driving state or a power generation state in the range, the first power motor M1 can be from 0r/min to 954r/min in the reverse direction, and the first power motor M1 can be in a driving state or a power generation state in the range.

When the first brake B1 and the second clutch C2 are engaged and the first clutch C1 and the second brake B2 are released, the transmission is in a high gear state. The third planetary row 207 does not transmit torque. For example, the engine is in a stop state at this time, and the transmission is in a pure electric state. The rotating speed of the output shaft 202 is from 1500r/min to 3500r/min, which corresponds to the driving rotating speed of the second power motor M2, from 11625r/min to 27125r/min, the second power motor M2 can be in a driving state or a power generation state in the range, the first power motor M1 can be in a reverse direction 2550r/min to a reverse direction 5950r/min, and the first power motor M1 can be in a driving state or a power generation state in the range.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.