METHOD FOR SWITCHING, IN AN EFFICIENCY-OPTIMISED MANNER, A FOUR-STROKE INTERNAL COMBUSTION ENGINE COMPRISING A PLURALITY OF CYLINDERS AND FULLY VARIABLE VALVE TRAIN BETWEEN A FULL CYLINDER OPERATION AND A PARTIAL CYLINDER OPERATION

摘要

According to a claimed method for operating a four-stroke internal combustion engine comprising a fully variable valve train and at least one phase shifter for changing the time of the maximum valve stroke of the inlet valves, during the switching of the internal combustion engine between a full cylinder operation and a partial cylinder operation, a) the valve stroke is increased in an early switching phase on all cylinders and simultaneously the time of the maximum valve stroke is shifted by means of the phase shifter to an earlier time, and/or b) in a late switching phase at least on the cylinders which are to continue running after switching, the valve stroke is reduced and the time of the maximum stroke is shifted to a later time.