V-shaped plural cylinder two-cycle engine
AssigneeSanshin Kogyo Kabushiki Kaisha
InventorsSeiichi Nishimura, Tatsuyuki Masuda
Life of this patent
Estimating the term…
Abstract
Several embodiments of the type two-cycle crankcase compression engines having exhaust control valves for controlling the effective compression ratio of the engine. The exhaust control valves are rotatably journaled in respective cylinder banks and are disposed at the same distance from a plane passing through the center of the valley between the cylinder banks as each other facilitating a common drive therefor. In one embodiment the exhaust control valves are disposed on the side of the cylinder banks adjacent the valley and in another embodiment they are disposed on the outside of the cylinder banks.
Claims10
A V-type two-cycle crankshaft compression internal combustion engine comprised of a cylinder block having a pair of cylinder banks disposed at an angle to each other and defining a valley therebetween, cylinder bores formed in said cylinder banks and having their respective axes disposed on opposite sides of a plane of symmetry passing through said valley, exhaust ports formed in said cylinder banks and serving respective cylinder bores therein, said exhaust ports of said cylinder banks being at equal distances on opposite sides of said plane of symmetry, each of said cylinder banks being formed with a valve bore extending from one end of said engine on a respective side of said plane and parallel to each other and to said plane at equal distances therefrom, first and second exhaust control vales each rotatably journaled in a respective one of said valve bores, and a common actuator located at said one end of said engine for actuating both of said first and said second exhaust control valves simultaneously.
Dependencies are inferred from the claim text.