A shift control method for a double-motor transverse electric drive axle assembly system

Abstract

The invention discloses a double-motor horizontal electric drive axle assembly system and a shift control method. The system includes: drive motor I, input shaft I, input shaft I gear, coupling sleeve I, intermediate shaft, intermediate shaft gear I, intermediate shaft gear II, intermediate shaft gear III, three-axis gear, coupling sleeve II, input shaft Ⅱ gear, driving motor Ⅱ, input shaft Ⅱ, three shafts, driving half shaft, differential, differential gear, driving wheel, spline connection A, spline connection B. The method comprises the following steps: Step 1, the dual-motor low-speed gear changes to the dual-motor high-speed gear; Step 2, changes from the dual-motor high-speed gear to the dual-motor low-speed gear; Braking control in the gear mode; the advantages of the present invention are: the power output can be allocated reasonably, the power is saved, the effect of energy saving and environmental protection is achieved, the waste of electric energy is avoided, and the battery cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to a dual-motor transverse electric drive axle assembly system and a shift control method. Background technique [0002] At present, pure electric drive systems with more applications in the market include multi-speed transmissions and traditional drive systems with clutches, multi-speed transmissions and drive systems without clutches; two independent drive motors and fixed gears with drive shafts Transmission device; drive motor and primary reducer transmission device. [0003] The patent application with the publication number CN108501765A provides a shift control method, device and vehicle for an electric vehicle, wherein the method includes: detecting the vehicle speed; Control the vehicle to coast, wherein the predetermined vehicle speed is greater than 0 km / h; control the gear state to the first intermediate state until the vehicle speed drops to the pr...

AI Technical Summary

Problems solved by technology

[0005] To sum up, 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 higher transmission efficiency and no power interruption; the drive motor The transmission device with the first-stage reducer can realize stepless speed change, but the acceleration and climbing ability are poor, so that the efficiency of the drive motor is not fully utilized

In addition, 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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