EPC (Electronic Power Control) stands for electronic engine power control system, many people also call it the ETC (Electronic Throttle Control) electronic throttle. The system consists of a number of sensor elements, controllers and other components. When a sensor failure or abnormal condition perceived, the control system will take the appropriate measures in accordance with procedures provided good.
The conventional driver power demand of the engine to control an accelerator pedal, an accelerator pedal by a wire cable controlling the throttle opening degree. In the EPC system, cancels the previous throttle cable to be replaced with a pedal sensor device, the position data of the engine control unit (ECU) in accordance with a pedal sensor device is calculated through the feedback best target throttle opening and transmits a signal to the section the throttle valve drive motor to the rotational angle.
This embodiment is superior to cable-acceleration control, because the electronic throttle by calculating an input signal from an accelerator pedal position, analysis, and that the engine power demand information into the engine through the respective actuators of torque. Due to safety, fuel consumption and other reasons, the need to adjust the rotational speed of the engine, the engine control unit may not be adjusted by an accelerator pedal position of the throttle. The advantage of this structure is the position of the throttle control unit can be defined according to various needs.
EPC indicator is more common in the mass car. After the key to open the door, the vehicle starts the self-test, the EPC indicator lights several seconds, then off. As not go out after starting the vehicle, the vehicle described mechanical and electronic system failure. Generally there are two possible EPC light. First, the throttle is dirty and should be cleaned. Another situation is not bright brake lights, the brake switch, and to check the line. Since there is the problem of oil, EPC fault light will be lit.