轮速信号在提高怠速控制性能过程中的应用

Wheel Revolution Sensor Has Application to Improve the Performance of Idle Control

在发动机管理系统(EMS)中,为了提高车辆行车过程中的安全性,引入比停车更高的行车怠速控制方法,以保证在滑行过程中,降低车辆临时负载增加时熄火的风险,而车速信号作为重要的车辆行驶与否的判断依据,当车速传感器出现故障时,该项功能将失效,行车安全性将降低。为了进一步降低安全风险,当车速传感器出现故障时,临时使用右前轮轮速传感器的车速信号替代,继续保证行车怠速控制的功能。

There is a function of idle control when vehicle running for improving the security,it reduce risk of engine stop disturbed by temp load required while the vehicle is coasting down.Vehicle speed sensor（VS sensor） with the use of judging the vehicle running state,and the idle control when vehicle running function will never active after VS sensor error,it risk of security.It will more safe to use wheel revolution sensor instead of VS sensor.And keep the function active.