Patent ID: 7036470
Filing Date: 2006-05-02
Classification: F01L

Abstract:
1. An internal combustion engine comprising an engine body having an outer surface that defines an outer area next thereto, an output shaft extending through the engine body, an air intake system arranged to deliver air to a combustion chamber of the engine, the air intake system having an intake valve movable between a closed position at which the air is not allowed to move to the combustion chamber and an open position at which the air is allowed to move to the combustion chamber, an exhaust system arranged to route exhaust gases in the combustion chamber to an external location of the engine, the exhaust system having an exhaust valve movable between a closed position at which the exhaust gases are not allowed to move to the external location and an open position at which the exhaust gases are allowed to move to the external location, at least one camshaft actuating the intake valve or the exhaust valve, the camshaft extending through the engine body and toward the outer area beyond the outer surface, a drive mechanism arranged to drive the camshaft, at least a portion of the drive mechanism being disposed in the outer area, a hydraulically operated change mechanism arranged to change an angular position of the camshaft relative to the output shaft, and a control valve unit configured to control the change mechanism, the control valve unit comprising an actuator and a valve member, the valve member at least in part being disposed within the outer area and above a cylinder head member, which forms at least a portion of the combustion chamber.