Patent ID: 7823551

Claim:
A valve train for an internal combustion engine that uses a plurality of motors to open/close valve discs of cylinders, wherein the plurality of motors include a plurality of intake motors for use in driving to open and close intake valves provided for each of the cylinders; wherein at least one of the plural intake motors is commonly used for a group of cylinders constituted by plural cylinders where valve opening periods are not overlapped to each other; wherein the internal combustion engine valve train further comprises valve driving means for driving the valve discs for a particular cylinder independently of the valve discs for the other cylinders; wherein the number of cylinders used for combustion changes in a stepwise fashion in accordance with an operating state of an internal combustion engine; and wherein when an explosion stroke is performed at unequal intervals with at least one cylinder being deactivated, an air intake amount for one active cylinder, which performs an explosion stroke earlier, of two active cylinders between which an explosion stroke interval becomes relatively wider than that between other cylinders is made larger than that for the other cylinder of the two active cylinders.