Patent ID: 7793625

Claim:
A variable valve actuating apparatus for an internal combustion engine, comprising: a first valve actuating mechanism arranged to vary an intake valve operating angle of the internal combustion engine; and a second valve actuating mechanism arranged to vary an intake valve maximum lift phase of the internal combustion engine, the second valve actuating mechanism including: a housing arranged to rotate in synchronization with a crankshaft of the internal combustion engine; a vane member coupled to a drive shaft for intake valve operation, and movably mounted in the housing, the vane member including a vane defining first and second fluid pressure chambers on first and second opposite sides of the vane; a hydraulic circuit arranged to rotate the vane member relative to the housing by supply and return of a brake fluid to and from the first and second fluid pressure chambers so as to change the intake valve maximum lift phase; and a biasing device arranged to bias the vane member relative to the housing in a direction to retard the intake valve maximum lift phase.