Water-cooled internal combustion engine with direct fuel injection

Claim 1

A water-cooled, four stroke internal combustion engine which includes a V-shaped cylinder block which includes a number of cylinders, the cylinders being arranged in two banks, said V-shaped cylinder block defining a V-shaped space between the two cylinder banks therein, the cylinders in each said bank being spaced apart and including operable inlet and exhaust valves at their upper ends and individual liners which define coolant spaces therearound, flat upper wall means extending from said cylinder banks at a point coincident with the upper ends of the cylinders in each said bank across the V-shaped space so as to form a receiving chamber for combustion air therewith, said wall means being unitary with the cylinder block and providing structural reinforcement thereto, means forming a housing above the receiving chamber in the V-shaped space, said upper wall means also constituting the lower wall of the housing, said means forming the housing also being unitary with the cylinder block, a camshaft located within said housing and centrally positioned above the receiving chamber, said camshaft being oriented in parallel with said cylinder banks in the cylinder block, a number of push rods, each push rod extending between a respective inlet valve and exhaust valve of a cylinder to a point cooperable with the camshaft in the housing, and a number of individual pumps, each pump being cooperable with the camshaft in the housing for injecting fuel into a respective cylinder.