What is the abbreviation of automobile throttle position sensor?

The abbreviation of automobile throttle position sensor is TPS (throttle position sensor). Also known as throttle opening sensor or throttle switch. Its main function is to detect whether the engine is in idle or load condition, acceleration or deceleration condition. 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 working 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.

According to the change rate of signal voltage in a certain period of time, whether it is an acceleration state or a deceleration state is identified. According to these working conditions, the computer corrects the fuel injection quantity or controls the fuel cut-off.

Extended data

When the throttle valve is fully closed, the idle contact IDL should be turned on; When the throttle valve is fully opened or nearly fully opened, the full-load contact PSW should be turned on; At other openings, both contacts should be non-conductive. Otherwise, adjust or replace the throttle position sensor.

The throttle of the automobile engine is controlled by the driver through the accelerator pedal, which changes the air intake of the engine and thus controls the operation of the engine. Different throttle opening marks different working states of the engine.

In order to meet the requirements of different working conditions, the electronically controlled gasoline injection system is equipped with a throttle position sensor on the throttle body. It can convert the throttle opening into an electrical signal and send it to ECU as the basis for ECU to judge the working condition of the engine. There are two types of throttle position sensors: switch output type and linear variable resistance output type.