What is the function of the crankshaft position sensor?

The function of the crankshaft position sensor is to control the ignition timing of the engine and to confirm the signal source of the crankshaft position. The crankshaft position sensor is used to detect the top dead center signal of the piston and the crankshaft angle signal, and is also the signal source for measuring the engine speed.

Simply put, the function is to detect the crankshaft speed and angle of the engine and determine the position of the crankshaft. And transmit the test results to the engine computer or other computer. Use the camshaft position sensor – to determine the base ignition timing. The computer controls the ignition and fuel injection of the engine according to the signal of this sensor. Controls the timing of ignition and fuel injection, and controls the amount of fuel injected.

Crankshaft position sensors are usually mounted on the front end of the crankshaft, camshaft, distributor or flywheel. The crankshaft position sensor has three structural forms: magnetic induction type, photoelectric type and Hall type.

The crankshaft position sensor is mounted on the transmission clutch housing, behind the left side of the engine block. The crankshaft position sensor is secured with two bolts. The bottom of the crankshaft position sensor is filled with an adhesive paper or cardboard pad to adjust the depth of the sensor. Once the engine is started (after installing the crankshaft position sensor), the excess portion of the paper pad should be cut off. The new factory replacement sensor will carry this pad. If the original crankshaft position sensor is reinstalled or the transmission and clutch housings are replaced, new gaskets must be installed.

Post time: Jun-17-2022