Car clutch pedal Sensor - What is 3 plug
The automotive clutch pedal sensor is usually a 3-plug plug-in located at the clutch pedal . Its main role is to detect the position of the clutch pedal and pass this information to the car's electronic control unit (ECU). When the driver depresses the clutch pedal, the sensor sends a signal to the ECU, which uses this signal to determine whether to cut off the engine's power output .
The clutch pedal sensor works as follows: During a gear shift, the driver presses down on the clutch to cut off power, and the sensor quickly sends a signal to the ECU. After receiving the signal, the ECU determines that a gear shift is likely to occur and temporarily stores the current engine speed, accelerator pedal position, and fuel injection volume. When the shift is complete and the clutch is released, the sensor notifies the ECU again. The ECU monitors changes in engine speed and checks the status of the accelerator pedal. If the speed drops or tends to drop, and the gas pedal position does not change or does not change enough, the ECU will immediately order an increase in fuel injection speed to maintain or compensate. If the position of the accelerator pedal changes, the system will adjust accordingly to the operation of the accelerator. This mechanism ensures a smooth shifting process, as well as a smoother acceleration and deceleration .
The main function of the clutch pedal sensor is to provide a 12 volt voltage signal to the engine control unit . When the driver presses the clutch, the sensor switch is disconnected, and the engine control unit cannot receive the signal from the clutch, indicating that the engine connection needs to be disconnected. As a result, the ignition lead Angle is reduced and fuel injection is reduced to reserve power to avoid shock when shifting .
Specifically, the functions of the clutch pedal sensor include:
Ensure a smooth start : after the engine starts, the driver first presses the clutch pedal, separates the engine from the transmission system, and then gradually release the clutch pedal, so that the clutch is gradually engaged, so as to achieve a smooth start .
ensures smooth shift of the transmission system : Before shift, the driver needs to press the clutch pedal to interrupt the power transmission, so that the meshing pair of the original gear is released, and the speed of the meshing pair of the new gear is gradually synchronized, so as to reduce the impact during shift and achieve smooth shift .
prevent transmission system overload : in emergency braking, the clutch can rely on the relative motion between the active part and the driven part to eliminate the inertia torque of the transmission system and prevent transmission system overload .
If the clutch pedal sensor fails, it may lead to a decrease in the frictional performance of the driven part, or the clutch is kept in a semi-linkage state for a long time, which may cause premature skidding. At this time, the engine can not effectively transfer large torque to the transmission system through the clutch, resulting in the car can not get enough driving force, and even make the car can not start .
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