Patent ID: 6796294
Filing Date: 2004-09-28
Classification: F01L,F02B,F02D,F02M

Abstract:
An internal combustion engine comprising:a camshaft interlocked with a crankshaft; a valve chamber forming member forming a valve chamber for containing the camshaft; a valve train arranged in the valve chamber to open and close intake and exhaust valves; decompression mechanisms arranged in the valve chamber to open the intake or the exhaust valves during a compression stroke; a fuel pump having an actuating member extending in the valve chamber, and attached to the valve chamber forming member; a plurality of bearings arranged in the valve chamber to support the camshaft; journals formed in the camshaft and supported by the bearings, the number of the journals being equal to that of the bearings; and a pump cam for driving the actuating member through a cam follower, formed on the cam shaft adjacently to an end one of said journals at one axial end of the camshaft with respect to an axial direction of the camshaft; wherein a specific one among the decompression mechanisms is provided opposite the end one of said journals relative to the pump cam with respect to the axial direction, the camshaft is provided with valve cams for opening and closing the intake and the exhaust valves for a cylinder associated with the specific decompression mechanism, the specific decompression mechanism is disposed between the pump cam and the valve cams, and the cam follower has a contact tip in contact with the pump cam, and a pushing tip in contact with the actuating member at a position nearer to the valve cams than the contact tip with respect to the axial direction.