Patent ID: 6213087
Filing Date: 2001-04-10
Classification: F02D,Y02T

Abstract:
A method for operating an internal combustion engine, comprising the steps of:directly injecting a fuel quantity into a combustion chamber of the internal combustion engine according to one of a first mode during a compression period and a second mode during an induction period; andcontrolling in the first mode and in the second mode the fuel quantity injected into the combustion chamber according to at least one of an open-loop control and a closed-loop control, the open-loop control being performed in a way that is different than a way according to which the closed-loop control is performed, wherein;the first mode is operated as a normal mode,the second mode is operated as an exceptional mode,the exceptional mode is requested on the basis of an operating state of the internal combustion engine,the normal mode is always used if no request for the exceptional mode is made, andthe exceptional mode is only used if a first preselected time duration has elapsed since the last use of the exceptional mode.