Patent ID: 7210454
Filing Date: 2007-05-01
Classification: F01L,F02B,F02D,Y02T

Abstract:
1. A cylinder rest internal combustion engine comprising a plurality of cylinders, the plurality of cylinders divided into two or more cylinder groups, each cylinder comprising a throttle valve, at least some of the plurality of cylinders configured to be selectively non-operative during engine operation by means of a cylinder resting mechanism, the throttle valve of each said cylinder being independently operable on the basis of said group to which said cylinder belongs, and the number of resting cylinders determined according to a throttle operation variable set by an operator, wherein each cylinder group comprises a unique throttle valve opening, except when the throttle valve is fully opened or fully closed, and a throttle valve control unit for controlling the amount of opening of said throttle valves, wherein during engine operation, the throttle valves of the groups are opened sequentially by the throttle valve control unit such that the throttle valve is opened in a next cylinder group before the throttle valve opening of a former cylinder group is brought to a fully opened state.