What is the working principle of an automotive crankshaft position sensor?

[CollinAnn]

The principle of the crankshaft position sensor is to determine the position of the crankshaft, specifically its rotational angle. It typically works in conjunction with the camshaft position sensor to determine the basic ignition timing. Below is an introduction to the relevant content: 1. Parameters detected by the crankshaft position sensor: The crankshaft position sensor is used to detect engine speed, piston top dead center, and the rotational angle of the crankshaft. These parameters are the primary control factors for calculating the air-fuel ratio of the mixture and adjusting ignition timing. 2. Specific principle: The crankshaft position sensor sends these parameters as signals to the engine control unit (ECU). If the crankshaft position sensor malfunctions, the signals cannot trigger the electronic ignition (or ECU) to operate, resulting in no ignition command and no fuel injection. In such cases, the engine will fail to start.