Patent ID: 7063062
Filing Date: 2006-06-20
Classification: F02D,F02M,Y02T

Abstract:
1. A method for determining a number of valves to operate in an internal combustion engine operating in a multi-stroke cylinder mode, the method comprising: determining an operating condition of an engine; operating at least two groups of cylinders, a first group operating in a first cylinder stroke mode, and a second group operating in a second cylinder stroke mode; and determining a valve pattern to operate, based on said operating condition, in said first cylinder group and determining a valve pattern to operate, based on said operating condition, in said second cylinder group that is different than the pattern of operating valves in said first group of cylinders, wherein the difference between said first valve pattern and said second valve pattern is at least one of a number of operating valves per cylinder and a region of operating valves in the cylinder.