What is throttle position sensor in vehicle?

A variable that must be measured for electronic engine control is the throttle plate angular position. The throttle plate is linked mechanically to the accelerator pedal. Throttle plate restricts the air flow into the intake manifold. When the driver depresses the accelerator pedal, this linkage causes the throttle plate angle to increase, allowing more air to enter the engine and thereby increasing engine power. Most throttle angle sensor are essentially potentiometers. This potentiometer can be used to measure any angular rotation, in particular the throttle angle. The only disadvantage to the potentiometer for automotive applications is its analog output. For digital engine control, the voltage must be converted to digital format using an analog to digital converter.