Motor vehicle combustion engine misfire recording method in which crankshaft speed is monitored and additionally temperature and exothermic energy conversion in the pre-catalytic converter

摘要

Method for detecting combustion engine (10) misfires in which unevenness in engine running associated with misfires is detected by monitoring the rotational velocity of the crankshaft and comparing variations with a threshold value. Additionally the temperature (Tvvk, Tivk, Tnvk) and exothermic energy conversion in the pre-catalytic converter are monitored.