An engine includes a side wall, a head cover, and a cam cover. The cam cover is disposed obliquely relative to the side wall. The cam cover has a seal line that seals up a gap between the head cover and the cam cover. The engine further includes a cam cap fixed to an upper surface of the side wall to support a camshaft so as to be rotatable between the side wall and itself.
1. An engine comprising:
a side wall;
a head cover;
a cam cover covering a part of a camshaft of the engine and disposed obliquely relative to the side wall, the cam cover having a seal line that seals a gap between the head cover and the cam cover; and
a cam cap, fixed to an upper surface of the side wall to support the camshaft so as to be rotatable between the side wall and itself,
wherein the cam cover has an arch shape spaced apart from a circumferential surface of the camshaft and is formed integrally with the cam cap so as to bridge the upper surface of the side wall and an upper surface of an external wall that lies adjacent to the side wall,
the head cover is fixed to upper portions of a cylinder head of the engine and the cam cover, and
a seal line passing obliquely between the side wall and the external wall so as to avoid a protruding corner lying therebetween as seen from the top is formed on an upper surface of the cam cover.
2. The engine according to claim 1 further comprising:
a side wall bulging portion formed so as to bulge towards a valve train compartment on the upper surface of the side wall; and
an external wall bulging portion formed so as to bulge towards the valve train compartment on the upper surface of the external wall,
wherein the cam cover is provided so as to connect the side wall bulging portion and the external wall bulging portion.
3. The engine according to claim 1 further comprising:
a plurality of cap attaching holes formed to fix the cam cap to the upper surface of the side wall; and
a plurality of cover attaching holes formed to fix the head cover to the upper surface of the side wall,
wherein the plurality of cap attaching holes and the plurality of cover attaching holes are disposed in a straight line.
4. The engine according to claim 1 comprising:
an auxiliary machine fixed to the side wall and the cam cap.
5. The engine according to claim 1 , wherein
the cam cap is fixed to a front surface of the side wall that is positioned at a rear side of the engine.
6. The engine according to claim 1 , wherein
an oil dropping hole is opened below the cam cover in a floor surface of a valve train compartment of the engine.