The Ming Rui crankshaft position sensor is near the pulley. Crankshaft position sensor is one of the most important sensors in engine electronic control system. It provides ignition timing (ignition advance angle) and signals to confirm crankshaft position, and is used to detect piston top dead center, crankshaft angle and engine speed. The following are the relevant forms of crankshaft sensor:

1, magnetic pulse crankshaft position sensor, installed behind the pulley at the front end of the crankshaft, with a thin circular toothed disc (called signal disc) at the rear end of the pulley, installed on the crankshaft together with the crankshaft pulley and rotating with the crankshaft;

2. The photoelectric crankshaft position sensor is installed in the distributor, which consists of a signal generator and a signal disk with notches and light holes. The light-emitting diode is used as the signal source, which rotates with the rotor. When the light-emitting hole is aligned with the light-emitting diode, the light shines on the phototransistor to generate an electrical signal, which is amplified by the amplifier circuit and transmitted to the ECU；.

3. The Hall-type crankshaft position sensor uses the principle of Hall effect to generate voltage pulse signals corresponding to the crankshaft angle. It uses trigger blades or gear teeth to change the magnetic field intensity passing through the Hall element, so that the Hall element generates a pulsed Hall voltage signal, which is amplified and shaped as the output signal of the crankshaft position sensor.