How many types of crankshaft position sensors are there?

[LeDiana]

Crankshaft sensors mainly come in three types: magnetic induction type, Hall effect type, and photoelectric type. The function 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. Details about crankshaft sensors are as follows: 1. Magnetic induction type: The magnetic induction speed sensor and crankshaft position sensor are installed in two layers within the distributor. The sensor consists of a permanent magnet induction detection coil and a rotor (timing rotor and speed rotor), with the rotor rotating along with the distributor shaft. 2. Hall effect type: The Hall effect speed sensor and crankshaft position sensor are signal generators that utilize the Hall effect. The Hall signal generator is installed inside the distributor, coaxial with the distributor rotor, and comprises an encapsulated Hall chip and a permanent magnet fixed together on the distributor plate. The number of notches on the trigger wheel matches the number of engine cylinders. 3. Photoelectric type: The photoelectric crankshaft position sensor is generally mounted inside the distributor and consists of a signal generator and a signal disk with light holes. The signal disk rotates with the distributor shaft, featuring 360 photolithographic slits on its outer ring to generate signals for every 1° of crankshaft rotation. Slightly inward, there are six evenly spaced light holes at 60° intervals, producing signals for every 120° of crankshaft rotation. One of these holes is wider, used to generate the signal relative to the top dead center of the first cylinder.