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Automotive glossary: What is a Throttle Position Sensor or Throttle Potentiometer? (Abbr.: TPS)

Definition of Throttle Position Sensor: With injection engines, the position of the throttle valve, as well as the speed at which it is opened via the accelerator, beside other information, is required by the engine electronics for the calculation of the correct injection quantity. For this purpose, the throttle position sensor is mounted on the axis of the throttle valve. So opening and closing of the valve causes a changed electric resistance as a signal to the control electronics.

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