What does it mean that the public appears epc?

The emergence of epc in Volkswagen indicates that the engine management system or electronic control has failed. When epc light is on, the common fault causes are unstable idle speed, engine jitter during cold start, brake light is not on, brake switch is damaged and so on. Under normal circumstances, the self-inspection starts after the vehicle is turned on with the power key, and the epc indicator lights up for a few seconds and then goes out; If the car doesn't go out after starting, it means there is something wrong with the mechanical and electronic system of the car.

In the past, the accelerator pedal was adjusted according to the power demand of the engine, and the accelerator opening was controlled by steel wire. In epc system, the controller of pedal device is used to replace the previous throttle line. According to the position data fed back by the pedal controller, the engine control unit calculates the optimal target throttle opening and sends a signal to the driving motor to make the throttle rotate to this angle.

This method is stronger than cable acceleration control, because the electronic throttle obtains the power demand of the engine by calculating and analyzing the input signal of the accelerator pedal position, and converts this information into the torque of the engine through the actuator.

When the engine speed must be adjusted for safety, fuel consumption and other reasons, the engine control unit can adjust the throttle position without using the accelerator pedal. The advantage of this structure is that the control unit can limit the position of the throttle according to various requirements. Million car purchase subsidy