Driving anti-slip control system of shaft-driven electric vehicle and control method thereof

Abstract

The invention relates to a driving anti-slip control system of a shaft-driven electric vehicle, belonging to the technical field of a vehicle control system. The invention is characterized in that the speed interval of a vehicle is judged according to the instant vehicle speed. At the high-speed stage, a motor moment is adopted to carry out independent control, so as to ensure the driving stability of the vehicle; at the medium / low-speed stage, the road surface condition of the vehicle is judged according to the slippage rate of two driving wheels, so as to adopt different control methods to the vehicle. Aiming at the bisectional road surface, the motor moment and a braking moment are adopted to carry out coordination control, namely the motor moment is adopted to carry out high-selection control and the braking moment is applied on the driving wheel at the low-adhered side for intervention, thereby ensuring the accelerating capacity of the vehicle; aiming at the single road surface, the motor moment is adopted to carry out independent control, namely the motor moment is adopted to carry out low-selection control, thereby ensuring the accelerating smoothness of the vehicle.

Description

technical field [0001] The invention relates to a vehicle control system and a control method, in particular to a drive anti-slip control system and a control method for a shaft-driven electric vehicle. Background technique [0002] The driving anti-skid control system (ASR, Acceleration Slip Regulation and TCS, Traction Control System) of the car is to prevent the driving wheel from slipping or idling during the start or acceleration of the car, especially to prevent the driving wheel from slipping when the car is on an asymmetric road surface, thereby A vehicle control system that improves the stability and maneuverability of the vehicle, and can improve the traction capacity of the vehicle by adjusting the slip rate of the drive wheels. [0003] Since the slip rate of the wheel has the following relationship with the ground adhesion coefficient, such as figure 1 shown. With the increase of the wheel slip rate, the longitudinal adhesion coefficient of the ground increase...

AI Technical Summary

Problems solved by technology

U.S. Patent US6321154B1 proposes a device and method for controlling the slippage of the driving wheels of a vehicle, which is mainly aimed at the start-up stage of the vehicle, and controls the engine drive torque according to the reference value of the engine speed, and only performs braking torque intervention on the wheel that starts to slip first. , also lacks the content of coordinated control of motor drive torque and braking torque

Images