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Characteristic curve and setpoint values

The transition from a high phase to a low phase indicates a falling tooth flank. The engine control only counts the falling tooth flanks. The difference between 2 falling tooth flanks is a crank angle of 6°.

Fig 1: Engine Control Characteristic Curve
G09872359Courtesy of BMW OF NORTH AMERICA, INC.
Index Explanation
1 Signal shape (calculated internally)
2 Increment wheel
3 Tooth gap

Observe the following setpoint values for the crankshaft sensor:

Size Value
Voltage range 6 to 16 Volts
Engine speed range up to 8000 rpm
Air gap range 0.1 to 1.8 mm
Maximum output current 20 mA
Ambient temperature -40 °C to 160 °C