Principle of electronic accelerator pedal, fault repair of accelerator pedal sensor

The electronic accelerator pedal is used in the electronic accelerator control system. The principle is to convert the accelerator demand signal into a voltage signal through the pedal position sensor and send it to the ECU. The ECU integrates the current vehicle speed, vehicle distance, throttle opening, engine speed and other information to calculate the knot The best valve opening. The ECU controls the output torque of the DC motor and continuously adjusts the opening of the electronic throttle. The throttle position sensor feeds the throttle position signal back to the ECU to form a closed-loop control, and finally stabilize the electronic throttle to the best opening.

The accelerator pedal sensor is installed inside the accelerator pedal to monitor the position of the pedal. When the accelerator pedal sensor detects the change in the height of the accelerator pedal, it will send the information to the ECU. This information and the data information from other systems will be processed by the ECU to calculate a control signal and send it to the servo motor relay through the line. The electric motor drives the throttle actuator.

If the accelerator pedal sensor fails, the fault light will turn on, and the ECU will not be able to sense the throttle, which will cause the car to be idling unstable, the throttle sticks, refueling does not respond, or it loses power and cannot drive. At this time, you should perform maintenance in time, remove the throttle assembly, find the signal output line corresponding to the sensor, use a multimeter to measure the line, pull the pedal, observe the change of the meter value, and judge whether there is a fault. Check whether the sensor wiring harness is open or the connector is off. If it is damaged, replace it directly.