What are the classifications of throttle position sensors?

There are three kinds of throttle position sensors: potentiometer type, contact type and integrated type. Throttle position sensor, also known as throttle opening sensor or throttle switch, is mainly used to detect whether the engine is in idle or load state, acceleration or deceleration state. It is essentially a variable resistor and several switches installed on the throttle body. The rotating shaft of the resistor is connected with the throttle valve, and it has two contacts: a fully open contact and an idle contact. When the throttle valve is in the idle position, the idle contact is closed and the idle condition signal is output to the computer. When the throttle valve is in other positions, the idle contact is opened, and voltage signals with different angles relative to the throttle valve are output, and the computer identifies the engine load according to the signal voltage value.