Patent ID: 6415655
Filing Date: 2002-07-09
Classification: F02D

Abstract:
A method of synchronization or of cylinder coordination to a crankshaft position for determining a cylinder position relative to a crankshaft angle in a multi-cylinder internal combustion engine with a crankshaft which rotates twice per working cycle, comprising the steps ofsupplying an output signal by a crankshaft transmitter, which per revolution of the crankshaft supplies a reference signal associated with an upper dead point of a piston of a predetermined cylinder; evaluating the output signal of the crankshaft transmitter by a control device for determining a rotary speed of the crankshaft and for forming fuel injection signals; performing a preliminary synchronization after a detection of the reference signal by releasing a test injection for an associated cylinder; if a rotary speed increase is detected after the test injection, verifying the preliminary synchronization and performing a complete synchronization; if an expected rotary speed increase failed, not providing the complete synchronization but instead releasing a new fuel injection for the same cylinder which is displaced by 360Â°; if thereafter the rotary speed increase is detected, performing a verification of the preliminary synchronization; if the rotary speed increase is not detected, releasing further fuel injections each correspondingly displaced by 360Â° until a rotary speed increase is recognized or a predeterminable maximum number of fuel injections is reached.