Patent ID: 6418895
Filing Date: 2002-07-16
Classification: F01L

Abstract:
A valve open-and-closure timing changing apparatus for an internal combustion engine, comprising:a rotary body adapted to revolve in synchronization with a revolution of a crankshaft connected to the engine; a camshaft; a housing member that revolves together with the rotary body; a vane rotor member relatively rotatably housed within the housing member, that revolves together with the camshaft, and having at least one vane radially projected therefrom; at least one pair of advance angle and retardation angle chambers partitioned between the housing member and vane rotor member by the vane; a hydraulic supply-and-draining device that supplies working oil into either one of the pair of the advance angle or retardation angle chamber while draining the working oil from the other of the pair of the chambers to achieve a relative rotation between the housing member and vane rotor member; a boss portion projected from one axial direction of the vane rotor toward an outside of the housing member or extended at same position thereof; a linkage pin interposed between a journal of the vane rotor member and the camshaft to prevent a relative rotation between the journal of the vane rotor member and the camshaft, the linkage pin being planted into either one of the journal of the vane rotor member or the camshaft; and a groove into which the linkage pin is inserted formed radially on the other of the journal of the vane rotor member or the camshaft.