Its function is to detect the engine speed, so it is also called speed sensor; It detects the top dead center position of the piston, so it is also called top dead center sensor, which includes detecting the top dead center signal of each cylinder for controlling ignition and detecting the top dead center signal of the first cylinder for controlling sequential fuel injection.
The crankshaft position sensor is installed on the transmission clutch housing, behind the left side of the engine block. The crankshaft position sensor is fastened with two bolts, and the bottom surface of the crankshaft position sensor is padded with adhesive tape or cardboard pad to adjust the depth of the sensor. Once the engine is started, cut off the excess part of the paper pad.
Extended data
Crankshaft sensors mainly include magnetoelectric induction type, Hall effect type and photoelectric type.
1, magnetoelectric induction type:
Magnetoelectric induction speed sensor and crankshaft position sensor are installed on the upper and lower floors of the distributor. The sensor consists of a permanent magnet induction detection coil and a rotor, which rotates with the distributor shaft.
2. Hall effect formula:
Hall effect speed sensor and crankshaft position sensor are signal generators using Hall effect. Hall signal generator is installed in the distributor, coaxial with the distributor head, and fixed on the distributor through the packaged Hall chip and permanent magnet. The number of notches on the trigger impeller is the same as the number of engine cylinders.
3, photoelectric type:
The photoelectric crankshaft position sensor is generally installed in the distributor and consists of a signal generator and a signal disk with a light hole. The signal disk rotates with the distributor shaft, and the outer ring of the signal disk has a 360 photoetching gap, which generates a signal of1crank angle; Slightly inside, there are six smooth holes evenly distributed at an interval of 60, and the crank angle is 120.
0, where 1 aperture is wider to generate a signal relative to 1.
Cylinder top dead center signal.
Baidu Encyclopedia-Crankshaft Position Sensor