Throttle door sensor pcb(ceramic substrate)

Throttle position sensor is also known as throttle opening sensor or throttle switch. Its main function is to detect whether the engine is in idle condition or load condition, whether it is in acceleration or deceleration condition. It is essentially a variable resistor and several switches, which are installed on the throttle body. The appearance and internal structure are shown in the figure below.

The shaft of the resistor is linked with the throttle valve. It has two contacts: full open contact and 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 opens and outputs voltage signals with different angles relative to the throttle valve, and the computer identifies the engine load according to the signal voltage value; the acceleration condition or the acceleration condition is identified according to the change rate of the signal voltage in a certain period of time Deceleration condition. According to these working conditions, the computer can modify the fuel injection quantity or control the fuel cut-off.

throttle position sensor

The function of throttle position sensor

1. Control the amount of fuel injected into the car

There will be four working conditions in the process of using the engine. These four working conditions indicate the normal operation of the engine, and are also the maximum guarantee for the owner to have a good starting speed when stepping on the accelerator.

2. Check the operation of the engine

The throttle position sensor has two contacts, these two contacts are used to determine the working state of the vehicle, which can ensure the normal use.