How to solve the problem that the signal of throttle potentiometer is too small

Find a pin, the two pins that can conduct electricity are empty contact and ground, there is resistance between the three wires, and the biggest constant is power supply and ground, and the signal line will be changed by the rotation sensor. The rotation sensor tests whether the resistance is normal and whether the resistance changes continuously.

The throttle valve is the gate that controls the air entering and leaving the engine. When the outside air enters the engine, it will mix with gasoline to produce combustible mixture. The upper end of the throttle valve is connected with the air filter and the lower end is connected with the main body of the automobile engine. After the combustible mixture is produced, it will enter the engine through the pipeline, thus triggering the engine power system.

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Classification of throttle position sensors:

According to the structure, it is divided into switch type: the output is mainly switch type. Linear output type: the signal changes continuously when the throttle valve is opened. Compound: there is a switch signal, and there is an empty switch signal when there is an empty contact; Other signals should be based on linear output, and its contacts define idle speed or full load.

According to the principle, potentiometer type (contact type): voltage will contact with mechanical motion. Hall type (non-contact type): it is rarely used at present, mainly using the relationship between Hall effect and electromagnetism to influence Hall voltage and output a voltage signal proportional to the change of throttle opening.

Divide the signal according to the signal: when the throttle valve is opened, the voltage rises. Dual signal: there are two signals with different voltage values, but the change rate is the same. At present, the position sensors in many electronic throttles used in automobiles are basically dual-signal.

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