Patent ID: 7252054
Filing Date: 2007-08-07
Classification: F01L,F01N,F02B,F02D,F02M,Y02T

Abstract:
1. A method of operating an internal combustion engine including at least one cylinder and a piston slidable in the cylinder, the method comprising: supplying pressurized air from an intake manifold to an air intake port of a combustion chamber in the cylinder; operating an air intake valve to open the air intake port to allow pressurized air to flow between the combustion chamber and the intake manifold substantially during a majority portion of a compression stroke of the piston, wherein operating the air intake valve includes operating the air intake valve via at least first and second rotatable cams associated with the air intake valve; and shifting rotational phase of at least one of the first cam and a camshaft including the first cam; wherein the engine has a variable compression ratio; wherein the engine includes an adjustment device adapted to adjust the position of the second cam relative to a rocker arm operably coupled with the air intake valve.