Patent ID: 6868835

Claim:
An internal combustion engine comprising: three or more cylinders arranged in parallel; a crankshaft driven for rotation by pistons that reciprocate in the cylinders; a camshaft supported for rotation, interlocked with the crankshaft and extending across all the cylinders; a valve chamber forming member forming a valve chamber to contain the camshaft; a valve train disposed in the valve chamber to open and close intake valves and exhaust valves; and decompression mechanisms, respectively for the cylinders, arranged in the valve chamber to open the intake valves or the exhaust valves during a compression stroke; wherein the valve train includes the camshaft, and valve cams formed on the camshaft for the cylinders to open and close the intake valves and the exhaust valves through valve-operating members, a specific one, corresponding to a specific one of the cylinders, among the valve cams is located at a position not coincident with respect to an axial direction parallel to the axis of the camshaft with a position where an abutment portion, in contact with the valve-operating member, of the intake valve or the exhaust valve is located, and the decompression mechanism for the specific cylinder is located at a position coincident with respect to the axial direction with the position of the abutment portion of the intake valve or the exhaust valve.