Patent ID: 6830033
Filing Date: 2004-12-14
Classification: F02D

Abstract:
Method for phase recognition in an internal combustion engine with a plurality of cylinders in a suitable operating region, whereby a crankshaft sensor serves to determine a angular position of the crankshaft, a control apparatus evaluates the signals of the crankshaft sensor, and the control apparatus triggers injection and ignition impulses in dependence on the angular position of the crankshaft, the method comprising the following steps:A) Setting two ignition points for each working cycle for each cylinder, respectively, near a top dead center of a corresponding position; B) Adopting a phase relationship; C) Changing a &lgr;-value for at least one of the cylinders; D) Injecting at a selected time once or twice per working cycle in each cylinder E) Detecting speed changes of the internal combustion engine through at least one working cycle; and F) Distinguishing whether the phase relationship of step B is correct or incorrect by when a speed change occurred or by an absence of speed changes.