A vehicle torque distribution device and method

Abstract

The invention belongs to the field of vehicle drive control and provides a vehicle torque distribution device and method. The device and method are adopted in order to solve the problems that when a vehicle travels or crosses an obstacle on an uneven road surface or a low-adhesion road surface, the rotation speeds of all wheels can difficultly collaborate to be consistent, thus tire wear is sped up, the vehicle travels unstably, the wheels slip too much, and the power performance of the vehicle is reduced. The device comprises a calculation module used for calculating the slippage rate of the wheels, a prediction module used for predicting the optimal slippage rate of the wheels, an initial torque distribution module used for distributing the total torque to each wheel motor, and a torque output module used for conducting a proportional-integral operation on the difference value of the slippage rate and the optimal slippage rate to obtain the torque corrected value and superposing the torque corrected value and the initial torque distributed to the wheel motors to obtain the output torque value. By the adoption of the device and method, slippage of the wheels is reduced, and the safety and the stability of hub motors driving the vehicle to travel and the power performance of the whole vehicle are improved.

Description

technical field [0001] The invention relates to the field of vehicle drive control, in particular to a vehicle torque distribution device and method. Background technique [0002] Driving safety and stability are two important performance indicators of wheeled vehicles. In order to improve driving performance, it is necessary to adopt effective means to improve vehicle driving safety and stability. For vehicles driven by in-wheel motors, such as six-wheel independently driven electric vehicles, each wheel is driven independently. It is difficult to coordinate and unanimously. On the one hand, this will accelerate the wear of the tires, on the other hand, it will cause the vehicle to run unstable, and at the same time, it will cause the wheels to slip excessively and reduce the dynamic performance of the vehicle. Contents of the invention [0003] The invention provides a vehicle torque distribution device and method to solve the problem that when the vehicle is running on...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a vehicle torque distribution device and method to solve the problem that when the vehicle is running on uneven roads, low-adhesion roads or overturning obstacles, it is difficult for the speeds of the wheels to be coordinated. On the one hand, the wear of the tires is accelerated, and on the other hand, it causes The vehicle is unstable, and at the same time, it will cause the wheels to slip excessively, reducing the dynamic performance of the vehicle, reducing the slip of the wheels, and improving the safety, stability and dynamic performance of the vehicle driven by the hub motor

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