Throttle is a ke fashion control valve that controls air into the engine, when the gas enters the kiln and the gasoline is mixed into a flammable hun he qi, it burns to form a work. It gets air filter, next engine block, called the throat of a car engine. Classification: There are two kinds of traditional cable and electronic throttle, the traditional engine throttle manipulator is connected to the throttle pedal by cable (soft wire) or rod, at one end, the other end connects the throttle board to work. In order to control the opening angle of throttle, electronic is mainly adopted by throttle position sensor, thus regulate the size of the intake.