Basic Principles

The control principle of ETC system is shown as Fig.4.6.

Fig.4.6 Control Principle of ETC System(https://www.daowen.com)

When the engine is on,accelerator pedal position sensor will send the accelerator pedal signal to the electronic controller.The electronic controller will judge the driving intention of the driver according to that signal and refer to the engine’s rotation speed signal,intake pressure signal and other relative signal to get the optimum throttle opening parameter.Then compare it with the present throttle opening position,and when the throttle opening degree is not consistent with the optimum throttle opening parameter,the electronic controller outputs the control signal to make the throttle driving device work so that the throttle is adjusted to the appropriate position.

Fig.4.7 Accelerator Pedal Position Sensor