Sensor Wheel Adaptation

Sensor wheel adaptation
When the segment times are measured disturbances occur which are eliminated by means of adaptation, thereby permitting more precise detection of misfiring.

The following disturbances may occur:
- Mechanical tolerance of tooth flanks
- Damage to tooth flanks
- Center point and center of rotation of flywheel are not identical
- Torsional vibrations of the crankshaft
- Different charge/carburetion from cylinder to cylinder.

Adaptation takes place in three load and eight speed ranges, i.e. in a total of 24 different ranges. Adaptation is performed in both fuel off and fuel on modes.

The dominant range of adaptation is fuel off. Adaptation must take place in this range first; only then can further adaptation procedures be performed. Other thresholds are used, depending upon learning progress.
See also: (Actual values in Data Output With The Porsche System Tester 2). Data Output With Porsche System Tester 2