Idle speed control method and system for an electric vehicle

Abstract

The invention discloses an idle speed control method and a system for an electric vehicle. The method comprises the steps that a vehicle control unit judges whether the vehicle is in a starting stateor not; if the vehicle is in the starting state, the whole vehicle controller receives a braking torque request state signal sent by the electronic hydraulic braking controller, a gear state signal sent by the gear controller, a vehicle speed signal and an automatic parking state signal sent by the electronic stability control system, and an electronic parking state signal sent by the electronic parking controller; the vehicle control unit judges whether the received braking torque request state signal, the gear state signal, the vehicle speed signal, the automatic parking state signal and theelectronic parking state signal are respectively preset values; and if yes, the vehicle control unit sends an idling torque request signal to the motor controller, and the motor controller controls to execute idling torque output. The idle speed working condition can be increased in the electric automobile.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an idle speed control method and system for electric vehicles. Background technique [0002] With the rapid development of the automobile industry and the continuous improvement of people's living conditions, automobiles have become one of the indispensable means of transportation for people to travel. Car ownership is increasing year by year, and more and more people own private cars. Electric vehicles are the current development direction of the automotive industry. [0003] Traditional fuel vehicles use a fuel-driven engine as the power system, and set an idling condition to keep the engine running when the vehicle is empty. However, pure electric vehicles use electric motors driven by electric energy as the power system, and can directly control the running state of the motors by controlling the power supply circuit on and off, so there is no need for idling conditions ...

AI Technical Summary

Problems solved by technology

However, a pure electric vehicle uses an electric motor driven by electric energy as the power system, and can directly control the running state of the motor by controlling the power supply circuit on and off, so there is no need for idling conditions similar to fuel vehicles.

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