Rough road detection

The rough road detection identifies rough track driving on poor road surfaces (driving over stones, rubble/debris or potholes) based on the information on acceleration of the wheels obtained. If a rough section of road is detected, a fault is stored and the misfire detection is briefly suppressed. This is necessary as the vibrations in the drive train caused by poor road surfaces can lead to erroneous misfire detection. Conversely, it is also possible that the rough road detection comes into effect too late (once misfiring has already been erroneously detected). in which case incorrectly diagnosed misfiring is identified with the assistance of the rough road detection.

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