Traction force coordination control method, system and pure electric automobile

Abstract

The invention discloses a traction force coordination control method, which comprises the following steps of detecting a driving operation parameter, and calculating driving required torque by using the detected driving operation parameter; detecting a wheel system moving parameter, and calculating driving interference torque by using the detected wheel system moving parameter; calculating and outputting current motor required torque according to the driving required torque and the driving interference torque, wherein the wheel system moving parameter is relevant to the wheel movement, and is mainly calculated by an electronic stability control system; the calculated torque is the driving interference torque; the driving interference torque mainly considers the whole automobile driving stability. Therefore the driving required torque considers the driving interference torque; then, calculation is performed to obtain the current motor required torque; next, a motor controller outputs the torque; the integral traction force change meets the requirements of a driver; meanwhile, the driving stability of the traction force in the change process can also be ensured; the reasonable control on the traction force of a pure electric automobile is realized. The invention also discloses a traction force coordination control system and the pure electric automobile; the beneficial effects are shown as the abstract.

Description

technical field [0001] The invention relates to the technical field of automotive electronics, in particular to a traction coordination control method. The invention also relates to a traction coordination control system and a pure electric vehicle. Background technique [0002] In order to alleviate critical vehicle dynamic situations or prevent them from happening, more and more fuel vehicles are beginning to install electronic stability control systems (ESP, Electronic Stabilty Program), which are equipped with multiple sensors to record driving conditions, including speed sensors , acceleration sensor, torque sensor, pressure sensor, deflection rate sensor and so on. Through the data collected by these sensors, the electronic stability control system can identify the actual motion state of the vehicle, including the direction of acceleration or deceleration, whether the vehicle is swaying, whether the vehicle is skidding, etc., constantly monitor the emergence of emerge...

AI Technical Summary

Problems solved by technology

[0005] This control method is simple in structure and economical in operation, but its scalability is relatively poor. It can only control the slippage of the vehicle, and cannot solve the problem of vehicle body stability control such as understeer or oversteer; at the same time, the control effect is relatively limited. The controllable and adjustable braking torque is only realized by the feedback torque of the motor, and the torque value is limited by many factors such as the battery and the motor and should not be too large

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