The throttle is a controllable valve that controls the flow of air into the engine. When the gas enters the intake pipe, it mixes with the gasoline to form a combustible mixture, thereby burning and working. It is connected to the air filter and is connected to the engine block, which is called the throat of the car engine. The throttle has two kinds of traditional pull-wire type and electronic throttle. The traditional engine throttle control mechanism is connected by a cable (soft wire) or a pull rod, one end is connected to the accelerator pedal, and the other end is connected to the throttle linkage plate. The electronic throttle mainly controls the opening angle of the throttle according to the energy required by the engine through the throttle position sensor, thereby adjusting the amount of intake air.