Cam lubrication

摘要

An improved oiling apparatus for the camshaft lobes of an engine. The bearing portion of the camshaft is supported within a bore between an upper bearing cap member and a lower cylinder head member. Oil passage means extend from a source of pressurized oil through the upper and lower members and intersect or open to the bore at circumferentially spaced locations. The passage openings are interconnected during a portion of the camshaft rotation by a closed-ended groove in the camshaft bearing portion. A small opening or orifice in the cap member communicates with the oil passage and its axis is orientated slightly from normal to the surface of the cap member so as to direct a fine stream of oil onto an active surface of the nearby camshaft lobe. The small hole or orifice opening is drilled through the cap member from a recessed surface established substantially flat and normal to the intended axis of the orifice opening.