A motor system and control method for a vehicle, and the vehicle

Abstract

The invention discloses a motor system for a vehicle, a control method and the vehicle, and relates to the technical field of vehicles. The motor system for the vehicle comprises a motor, and the motor comprises a motor output shaft, wherein the motor shaft is provided with at least one spline. The system also comprises a speed reducer spline shaft sleeve which covers the outer part of the motor output shaft and is matched with a spline of the motor output shaft through a key groove, wherein at least part of the splines are internally provided with movable buffering sliding blocks, and the buffering sliding blocks are configured to be controlled to stretch out of the splines in the torque reversing process of the motor and make contact with the inner walls of the key grooves before the splines make contact with the inner walls of the key grooves so as to buffer the contact between the splines and the key groove. The invention further provides a corresponding control method. Meanwhile,the invention further provides the vehicle which comprises the motor system. The silence and comfort of the passenger compartment and the dynamic response of the motor can be considered at the same time.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a motor system and control method for a vehicle and the vehicle. Background technique [0002] With the national and worldwide advocacy of energy conservation and emission reduction, more and more new energy vehicles have been launched and put on the market in batches. [0003] However, in hybrid and pure electric vehicles, the motor torque is involved in the zero-crossing problem. From positive torque to negative torque or from negative torque to positive torque, due to the backlash between the motor output shaft and the reducer spline sleeve, the motor torque changes During the reversing process, the spline shaft sleeve of the reducer and the spline of the motor output shaft collide rigidly, causing abnormal noise and impact. In the low-speed section of the pure electric mode, because there is no high-decibel noise coverage of the engine, the abnormal noise problem is particul...

AI Technical Summary

Problems solved by technology

[0003] However, in hybrid and pure electric vehicles, the motor torque is involved in the zero-crossing problem. From positive torque to negative torque or from negative torque to positive torque, due to the backlash between the motor output shaft and the reducer spline sleeve, the motor torque changes During the reversing process, the spline shaft sleeve of the reducer and the spline of the motor output shaft collide rigidly, causing abnormal noise and impact. In the low-speed section of the pure electric mode, because there is no high-decibel noise coverage of the engine, the abnormal noise problem is particularly prominent and serious. Affect passenger ride comfort

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