VERFAHREN ZUR ZYLINDERSELEKTIVEN UEBERWACHUNG DES ENERGIEUMSATZES BEI EINER MEHRZYLINDER-BRENNKRAFTMASCHINE

摘要

The invention relates to a process for monitoring the power output of the individual cylinders of a multicylinder internal combustion engine. During the working cycle of each cylinder, the instantaneous speed over a given angle of rotation of the crankshaft is determined and squared. Within each working cycle of the internal combustion engine, the mean linear increase or decrease in n<2> is subtracted from the actual n<2> profile to obtain a dynamically corrected n<2> profile, and for each cylinder the difference between the corrected n<2> values is calculated to obtain the ignition top dead centre of said cylinder and that of the next cylinder in the firing sequence. If the difference exceeds a predetermined threshold value, this is a reliable indicator of a combustion misfire. Dynamic variations in n<2> due to accelerating or braking are eliminated by correcting the n<2> profile.