Water vehicle having a "V" shaped multi-cylinder crankcase scavenging engine

Claim 1

A watercraft comprising a hull defining an engine compartment and including a water propulsion device, said water propulsion device powered by a four cycle, "V" type, internal combustion engine mounted in said engine compartment of said hull, said engine comprised of a pair of cylinder blocks disposed at a "V" angle to each other and forming a valley therebetween, each of said cylinder block having at least one cylinder bore, a crankcase at one end of said cylinder bores and forming a plurality of crankcase chambers each associated with a respective cylinder bore, a pair of cylinder heads closing the other end of said cylinder blocks, a plurality of pistons each reciprocating in a respective one of said cylinder bores and forming with said cylinder bores and said cylinder heads a plurality of combustion chambers, crankshaft means rotatably journalled in said crankcase, a plurality of connecting rods each coupled to a respective one of said pistons and said crankshaft means for transmitting motion therebetween, means for providing a seal so that said pistons, said cylinder bores, said connecting rods, said crankshaft means and said crankcase chambers act as a plurality of positive displacement pumps, intake means for admitting an air charge to said crankcase chambers in said valley, delivery means for discharging a compressed air charge from said crankcase chambers at the other side of said valley, a pair of compressor chambers located at said other sides of said valley for receiving the compressed charge therefrom the respective crankcase chamber, each of said cylinder heads having at least one intake port on said other side of said valley for serving the respective of said combustion chambers, means for supplying a compressed charge from said compressor chamber to said intake ports entirely located on said other side of said valley, at least one exhaust passage formed in each of said cylinder heads contiguous to said valley for discharging exhaust products from said combustion chambers, and an exhaust manifold positioned at least in part in said valley for collecting the exhaust gasses from said exhaust passages, said crankshaft means extending outwardly from said engine and coupled in driving relation, said crankshaft means arranged in driving relation with said water propulsion device.