Patent ID: 7665435

Claim:
An internal combustion engine comprising: a cylinder head; a camshaft holder provided on the cylinder head and rotatably supporting camshaft means included in a valve train for operating engine valves; and accessory means rotatively driven by the camshaft means, wherein the camshaft holder includes a lower camshaft holder and an upper camshaft holder, the lower camshaft holder being a frame structure detachably attached to and extending substantially throughout an upper surface of the cylinder head, the lower camshaft holder having integrally therein a plurality of bearing parts for rotatably supporting therein the camshaft means, the plurality of bearing parts of the lower camshaft holder including a plurality of lower bearing parts arranged at distances in a direction along the camshaft means the upper camshaft holder including a plurality of upper bearing parts detachably mounted to the lower camshaft holder through joining the plurality of upper bearing parts with the plurality of lower bearing parts of the lower camshaft holder, and wherein the accessory means has driving shaft means interlocked with the camshaft means, the camshaft holder being provided with an accessory holder integrally formed with an end part of the lower camshaft holder and having integral mounting seat means to be attached to an upper mounting surface of the cylinder head, the accessory holder being provided with through hole means into which at least either of the camshaft means and the driving shaft means is inserted and supported.