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Posted in: General phase or camshaft position sensor

What is Phase or Camshaft Position Sensor?


A phase or camshaft position sensor is an electronic device used in an internal combustion engine, both petrol and diesel, to monitor the position or rotational speed of the crankshaft.The camshaft position sensor gathers information about the vehicle’s camshaft speed and sends it to the vehicle’s engine control module (ECM). The ECM uses this data to determine the timing of the ignition, as well as the timing of the fuel injection that the engine requires.
Camshaft position sensor is also called cylinder identification sensor or phase detector. When a crankshaft or distributor advance ignition signal appears, the exact cylinder is detected by recognizing the mechanical positions of the crankshaft, camshaft, valves or the distributor shaft.

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How does phase or camshaft position sensor sensor work?
The camshaft phase sensor works according to the Hall principle. It scans a ring gear on the camshaft. The rotation of the ring gear changes the Hall voltage of the Hall IC in the sensor head. This change in voltage is transmitted to the control unit and evaluated there in order to establish the required data.

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