Two-cycle engine

Details Two-cycle engine Two-cycle engine

F - Mech Eng,Light,Heat,Weapons

01

B

F01B 25/02 (2006.01) B63H 11/04 (2006.01) B63H 21/14 (2006.01) F02D 13/02 (2006.01) F02B 75/02 (2006.01)

Patent

CA 2232761

To provide a structure for attaching exhaust control valves near exhaust ports in a two-cycle engine, the exhaust control valves variably controlling open areas of the exhaust ports. The cavity for receiving the exhaust control valves is formed near the upper edges of the exhaust ports on the cylinder block. The holder member is interposed between the cylinder block and the exhaust manifold, is attached to the pivot for supporting the exhaust control valves. A flange is provided for connection with the cylinder block. Therefore, the exhaust control valves are disposed near the upper edges of the exhaust ports. It is not necessary to form bearings on the cylinder block using a complicated process. Complicated parts such as bearings are collectively formed on the holder member that is independent and compact and easily machined. The pivot extends across the exhaust passages that are formed downwardly in order to detour around the pivot. A jet-propelled boat is provided with a saddle seat in which the power unit is neatly and compactly arranged in a limited space.

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