Throttle position sensor, also known as throttle opening sensor or throttle switch, is a device used to detect the state of the engine.
What does the throttle position sensor do?The main function of the throttle position sensor is to detect whether the engine is in an idling condition or a load condition, and whether it is an acceleration condition or a 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 to the throttle valve, and it has two contacts: a fully open contact and an idle contact. When the throttle valve is at the idle speed position, the idle speed contact is closed, and the idle speed condition signal is output to the computer; when the throttle valve is at other positions, the idle speed contact is opened, and the voltage signal at different rotation angles relative to the throttle valve is output, and the computer is based on the signal. The voltage value identifies the load of the engine; according to the change rate of the signal voltage within a certain period of time, it identifies whether it is an acceleration condition or a deceleration condition. The computer revises the fuel injection quantity according to these working condition information, or carries on the fuel cut-off control.
The role of the car throttle position sensor1. Control the fuel injection volume of the car
During the use of the engine, there will be four working conditions. These four working conditions indicate the normal operation of the engine and are also the greatest guarantee for controlling the car owner to have a good starting speed when he steps 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 car and under what conditions, which can well ensure the normality of use.
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