V-type, multi-cylinder, two-cycle engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsTatsuyuki Masuda, Seiichi Nishimura
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Abstract
An improved scavenging control system for a multi-cylinder, V-type, two-cycle crankcase compression internal combustion engine. In each embodiment, a scavenging manifold extends along one side of the crankcase chamber and communicates with the individual sealed sections therein through respective scavenging control passages. A plurality of butterfly-type throttle valves controls the communication between the crankcase chamber and the scavenging manifold and these valves are all affixed on a common valve shaft. In one embodiment, the scavenge control system is disposed in the valley between the cylinder banks and in the other illustrated embodiment, the scavenging system is disposed on one side of the crankcase and outside of the valley between the cylinder banks.
Claims29
A scavenge control system for a V-type crankcase compression internal combustion engine having a pair of angularly related cylinder banks each containing a plurality of cylinder bores, a crankcase chamber from which said cylinder banks radiate and having a plurality of sealed chamber sections each associated with a respective cylinder bore, a single scavenging manifold extending along one side of said crankcase chamber, a plurality of scavenging control passages each extending from a respective one of said crankcase chamber sections into said scavenging manifold, and valve means for controlling the communication of each of said crankcase chamber sections with said scavenging manifold.
Dependencies are inferred from the claim text.