Patent ID: 8100099
Filing Date: 2012-01-24
Classification: F02D,F02M,Y02T

Abstract:
1. A method of operating an internal combustion engine, wherein the internal combustion engine comprises the method comprising: wherein the opening of the intake valve and the exhaust valve and the closing of the exhaust valve is effected by a camshaft comprising at least a first cam and a second cam, each having defined cam profiles cooperating with said valves, wherein the first cam and the second cam have stroke contours that are interlaced against one another, wherein the first cam and the second cam do not lie within one another, wherein the second cam has a smaller stroke contour than the first cam, and wherein, when the internal combustion engine is operated in a low rpm range of less than 2500 1/min, the method further comprises: wherein both the shortening of the outlet event time and the lengthening of the crossover phase are achieved by switching from the first cam to the second cam.