Coaxial multi-gear front-drive hybrid power system

Abstract

The coaxial multi-gear front-drive hybrid power system comprises an engine, a generator, a driving motor, a gear speed change mechanism, a clutch and a differential mechanism, the clutch is arranged between an output shaft of the engine and the gear speed change mechanism, an output shaft of the gear speed change mechanism is connected with the differential mechanism, and the generator is electrically connected with the driving motor. A motor output shaft of the driving motor is of a hollow shaft structure, and an output shaft of the differential mechanism penetrates through the motor output shaft and then is connected with wheels. The system has four modes of pure electric drive, direct drive, series connection and parallel connection, the mechanical transmission efficiency is high, the wet clutch adopted by the system is good in gear shifting smoothness, the shafting arrangement is of a four-shafting structure, the arrangement position of the wet clutch and the arrangement position of a synchronizer are staggered, the size is small, a planetary gear is omitted, the cost is low, and the technical difficulty is small.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a coaxial multi-gear front-drive hybrid power system. Background technique [0002] With the gradual increase of the country's requirements for energy saving and consumption reduction of automobiles, new energy vehicles such as hybrid vehicles, pure electric vehicles, and hydrogen fuel vehicles have appeared on the market. Hybrid power systems usually consist of engines, generators, drive motors, controllers, hybrid The power-specific gearbox consists of several parts. It can replace the existing fuel vehicle gearbox technology and reduce fuel consumption. Real-time coupling of the engine and the motor through the control system to achieve multiple modes of driving, which not only has the advantages of strong power performance of fuel vehicles, but also has the advantages of high economy of pure electric vehicles. [0003] As disclosed in Chinese patent CN20560...

AI Technical Summary

Problems solved by technology

[0004] However, there are still some shortcomings in this power system. The motor shaft is installed separately, which takes up a large space, and there is a large idle space inside. As a result, the radial and axial dimensions of the electric drive axle are still large, and the torque and transmission ratio that can be transmitted are limited.

The engine and the generator are coaxially connected directly, and the working efficiency of the engine is not high

The engine drive mode has only one gear, and the engine drive efficiency is not high

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