Double input shaft transmission system and control method thereof

Abstract

The invention discloses a double input shaft transmission system and a control method thereof. The system comprises a first input shaft, a second input shaft, an output shaft, an intermediate shaft, a first coupling cover, a second coupling cover, a first gear set, a second gear set, a third gear set and a fourth gear set. By adopting the double input shaft transmission system, the space of a transmission is fully and reasonably used to provide a plurality of shifts to power output of a motor; moreover, the speed characteristic and an efficient operating region of the motor can be effectively used by converting various operating modes. The device is simple in structure and relatively low in cost. Furthermore, during shifting, active synchronous speed regulation and passive interrupted control can be realized, so that the dynamic property and the economical benefit of an automobile are improved.

Description

technical field [0001] The invention relates to the technical field of electric vehicle transmission, in particular to a dual-input-shaft gearbox system and a 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 transmission. [0004] For example, the Ch...

AI Technical Summary

Problems solved by technology

[0006] The problems in the above-mentioned prior art are: the traditional drive system with multi-gear transmission and clutch has better acceleration, but there is power interruption when shifting gears; the multi-gear transmission and the drive system without clutch have higher transmission efficiency and no power Interruption; the driving motor and the primary reducer transmission can realize stepless speed change, but the acceleration and climbing ability are poor, and the efficiency of the driving motor is not fully utilized

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.

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