What is the working principle of the crankshaft position sensor?

[StHaven]

The principle of the crankshaft position sensor is to determine the position of the crankshaft, i.e., the angle of the crankshaft. It usually works in conjunction with the camshaft position sensor to determine the basic ignition timing. The following is a related introduction: The crankshaft position sensor is used to detect engine speed, piston top dead center, and the angle of the crankshaft. These parameters are the main control parameters for calculating the air-fuel ratio of the mixture and performing ignition adjustment. The crankshaft position sensor sends these parameters in the form of signals to the engine control unit. If the crankshaft position sensor fails, the signal cannot trigger the electronic ignition (or ECU) to work, which will result in the engine not receiving an ignition command and no fuel injection. In this case, the engine will not start.