Double-motor hybrid driving and speed changing device

Abstract

The invention discloses a double-motor hybrid driving and speed changing device, which is characterized in that: an internal-combustion engine takes a solid rotating shaft as an output shaft; a front section of the solid rotating shaft is coaxially provided with a sleeve shaft; a first clutch device and a second clutch device are arranged on the solid rotating shaft; a rotor of a second motor is fixed on the sleeve shaft; a rotor of a first motor is fixed on the solid rotating shaft; and a first gear is fixedly connected to the sleeve shaft, wherein the first clutch device, the first motor, the second motor, the second clutch device, and a change gear set consisting of the first gear, a second gear and a transmission gear are respectively arranged in respectively independent cavities. Thedouble-motor hybrid driving and speed changing device can be converted in a plurality of working modes, can effectively prevent the influence of heat transfer and splashing of lubricating oil on the motors, ensures the stable working state of the motors, has compact structure and reasonable layout, and improves fuel economy of the complete vehicle.

Description

technical field [0001] The invention relates to a dual-motor hybrid driving and transmission device used in a hybrid vehicle. Background technique [0002] Faced with the scarcity of resources and the deterioration of the environment, people have higher and higher requirements for the safety, energy saving and environmental protection of automobiles. However, due to the constraints of fuel cells, charging stations, motors, controls, etc., mass production of pure electric vehicles and fuel cell vehicles cannot be achieved. Therefore, hybrid electric vehicles (HEV) have become a more suitable choice to solve the above problems. A hybrid vehicle is a vehicle that is jointly driven by an engine and an electric motor system. The engine uses a traditional internal combustion engine; the motor can be a permanent magnet motor or an excitation motor, a synchronous motor or an asynchronous motor. [0003] The current existing dual-motor hybrid electric vehicle power drive device is ...

AI Technical Summary

Problems solved by technology

[0003] The current existing dual-motor hybrid electric vehicle power drive device is composed of basic power modules such as engine, motor, battery pack, clutch and their respective control units. It has three basic modes: series connection, parallel connection and hybrid connection, but most of them belong to weak hybrid The power form, that is, the engine is used as the main power output, and the motor is used as the power auxiliary equipment, so the engine cannot work stably in the economic area

In addition, the unreasonable layout of each power module leads to excessive heat dissipation and motor failure, which eventually leads to a short time in the motor driving mode and poor overall fuel economy; and the structure is not compact, which affects the design of the whole vehicle

Foreign hybrid drive devices with planetary gear transmission generally have more gears and high technical content, but the manufacturing is difficult and the cost is high

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