Determines the position of the TDC of the compression stroke in the 1st cylinder. The sensor is installed in the cylinder head. The driving element is a rotor with ledges. The magnetic interaction of the sensor with these protrusions ensures the generation of a signal in the form of a pulsed voltage. VEBUD this signal in comparison with the signal of the crankshaft angle sensor allows you to determine the cylinder in which the fuel injection process should take place.