Patent ID: 6336440
Filing Date: 2002-01-08
Classification: F01L,F02D,G01M,Y02T

Abstract:
A method of detecting combustion misfires in an internal-combustion engine, including the steps ofvariably actuating valve drives of the engine by an electronic engine control; performing a load-dependent control with the control system by a cylinder-control program; the load-dependent control including the step of reducing power in at least one cylinder by separately affecting ignition and fuel supply thereto; the improvement comprising the steps of (a) detecting, in the control system by the cylinder-control program, said at least one cylinder with a cylinder-identification signal; (b) at predeterminable intervals detecting, from signals obtained in step (a), resulting deviations of predetermined operating data as normal operation; (c) detecting, as combustion misfires, deviations of the predetermined operating data from said normal operation obtained in step (b); and (d) generating a setting signal upon detecting deviations in step (c).