Drive system of double-motor double-shaft input speed changing box and gear shifting control method of drive system

Abstract

The invention belongs to the technical field of electric vehicle transmission, and specifically relates to a drive system of a double-motor double-shaft input speed changing box and a gear shifting control method of the drive system. The system comprises a drive motor I, a drive motor II and an electronic control mechanical automatic transmission. The electronic control mechanical automatic transmission comprises a first-gear gear set, a second-gear gear set, a third-gear gear set, a fourth-gear gear set, a coupling sleeve I, a coupling sleeve II, a transmission input shaft I, a transmission input shaft II and a transmission output shaft. The electronic control mechanical automatic transmission provides three gears for power output of the drive motor I and the drive motor II. By means of coupling of the drive motor I, the drive motor II and the electronic control mechanical automatic transmission and drive of the drive motor I and the drive motor II, shifting of three gears can be achieved. According to the system, the arrangement space of a finished vehicle is saved, the gears do not affect one another, the requirements for bearing and gear rotating speed are not high, and the life is long.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle transmission, and in particular relates to a drive system of a dual-motor dual-shaft input gearbox and a shift control method thereof. Background technique [0002] Environmental protection and energy saving are important issues facing the world in the 21st century. The Chinese government has also proposed the basic national policy of building a conservation-oriented society and the industrial development policy of encouraging the development of small-displacement energy-saving vehicles. Electric vehicles are the way to achieve this goal. One of the important means. [0003] At present, there are many pure electric drive systems in the market, mainly including: multi-speed transmission and traditional drive system with clutch; multi-speed transmission and drive system without clutch; two independent drive motors and drive shaft Fixed gear transmission; drive motor and primary reducer tra...

AI Technical Summary

Problems solved by technology

The traditional drive system with multi-speed transmission and clutch has better acceleration, but there is power interruption when shifting gears; multi-speed transmission and drive system without clutch have high transmission efficiency and no power interruption; the drive motor and primary reducer The transmission device can achieve stepless speed change, but the acceleration and climbing ability are poor, and the efficiency of the drive motor is not fully utilized

[0004] On the other hand, the car has different power requirements during the acceleration, low-speed and high-speed driving stages. If a single motor is used, it is difficult for the motor to work in the high-efficiency operating area all the time, which will easily cause waste of electric energy.

In the prior art, although there are also dual-motor drives, the layout is unreasonable, the weight of the whole system is heavy, and the gear exchange is not ideal, especially the high speed has high requirements on the speed of bearings and gears, which affects the service life

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