Crankshaft position sensor function - GF07.04-P-4116-01GA
with incremental control
Crankshaft position and engine speed are detected contactlessly. The clearance between the crankshaft position sensor (L5) and the teeth of the driven plate is fixed by the installation position.
When the crankshaft is rotating, an alternating voltage is generated in the crankshaft position sensor (L5) by the teeth of the driven plate.
In this case, the front edge of a tooth generates a positive voltage pulse, and the rear edge a negative voltage pulse. The distance from the positive to the negative voltage peak corresponds to the length of a tooth.
The gap created by 2 missing teeth has the effect that no voltage is generated in the crankshaft position sensor. This is analyzed for detecting the TDC position of cylinder 1 and 4 or 1 and 6, respectively.