Electric vehicle control method based on left and right electric wheel differential motion/braking control

Abstract

The invention relates to an electric vehicle control method based on left and right electric wheel differential motion/braking control. A control system is used for judging a steering intention of a driver according to the steering direction of a steering wheel and then judging an acceleration or deceleration intention of a vehicle; as a mode of acceleration of the vehicle, voltages of a left motor and a right motor are distributed according to the requirements of steering angles, so that the rotating speeds of a left electric wheel and a right electric wheel reach the requirements of the steering angles; as another mode of deceleration of the vehicle, braking forces applied to the left electric wheel and the right electric wheel are distributed according to the requirements of the steering angles; in the process of distributing the braking forces, in accordance with the difference of the braking strengths, different braking modes are adopted, i.e., magnetic fields of the motors are independently used for braking, the magnetic fields of the motors and a hydraulic braking system are jointly used for braking, and the hydraulic braking system is independently used for braking. The electric vehicle control method disclosed by the invention has the characteristics of protecting braking pieces, reducing power consumption, acquiring energy recovery, ensuring that the vehicle stably operates, saving energy, protecting environment, reducing cost and the like, and is convenient to operate.

Description

[0001] technical field [0002] The invention relates to an electric vehicle, in particular to a control method for the electric vehicle. [0003] Background technique [0004] In recent years, large-scale smog has continued to occur in most parts of the Middle East in my country. The Central Meteorological Observatory has continuously issued red warnings for smog. Energy conservation and emission reduction have long become the consensus of the whole society. The advantages of electric vehicles, such as low noise and zero emission, are completely in line with the current concept of energy conservation and environmental protection, and are one of the development directions of the automobile industry. [0005] With the wide application of various chassis electronic integrated control technologies in fuel vehicles, such as Traction Control System (Traction Control System, TCS), Body Electronic Stability Program (Electronic Stability Program, ESP), Electro-Hydraulic Power Steer...

AI Technical Summary

Problems solved by technology

[0012] The present invention mainly solves the problem of excessive loss of brake pads (brake pads) and excessive braking energy consumption in electric vehicles existing in the prior art, and the braking stability can only be corrected later through the ESP system. To solve technical problems, provide an electric vehicle based on differential / braking control of left and right electric wheels, which uses hydraulic brakes reasonably, reduces brake pad loss, reduces braking energy consumption, and greatly improves braking stability. Control Method