Pinking detection apparatus using adaptive measurement window for internal combustion engine

The detection apparatus has a control unit (10) which detects at least the engine speed, temperature and load. Via indicators (11,12,13) the ignition time point and the fed fuel amount are controlled. The one indicator (11) is preferably a conventional pulse indicator which detects cogs on the periphery of the flywheel, with position determination being obtained through one or more cogs having different spacing and width at a specific crankshaft position. The control unit incorporates an arithmetical unit (15) and the necessary memory (14), in which the regulating algorithm, fuel matrix and ignition matrix are stored. In each engine cylinder (4) is at least one spark plug (5). Ignition voltage is produced in an ignition coil (32) with a primary winding (33) and a secondary winding (34). The primary winding at its one end is connected to a battery (6) and in its earth connection is arranged an electrically controlled switch (35).