Patent ID: 7028660
Filing Date: 2006-04-18
Classification: F01L,F02D,Y02T

Abstract:
1. A method for improving the torque band of a multi-cylinder, four-cycle piston internal combustion engine comprising at least two cylinder pairs including fully variably triggered gas exchange valves, wherein each cylinder pair comprises two cylinders associated with each other by a firing interval of 360° crank angle, and wherein one cylinder pair is not fired by cutting off the fuel supply and acting upon the gas exchange valves resulting in a partial load operation, the method comprising: triggering the cylinders of the non-fired cylinder pair during the partial load operation so that the cylinders of the non-fired cylinder pair take in a predetermined charge quantity for adjusting a predetermined compression level that influences the torque band; and maintaining the gas exchange valves of the non-fired cylinders closed for the duration of the partial-load operation.