Aspin valve
An Aspin valve consists of a cone-shaped metal part fitted to the cylinder head in an internal combustion engine. Aspin valves were first patented by Frank Metcalf Aspin in 1939,[1] although the idea was devised before this time.[citation needed]
The valve rotates to provide the opening and closing necessary for intake and exhaust. It is attached to the engine, vertical to the cylinder block, via a shaft at its top; this allows the valve to rotate horizontally above the cylinder and when it turns. The valve is hollow, and has a large cut-out opening in one side. This alternately allows gases into the combustion chamber, and out to the exhaust system by lining up holes in the valve shaft with the cylinder-head ports which allows the gases to pass.[2]
References
[edit]- ↑ US2245743A, Metcalf, Aspin Frank, "Rotary valve", issued 1941-06-17
- ↑ "Spin Doctors: The Rotary Valve Cylinder Head". Old Bike Australasia. 2019-07-05. Retrieved 2020-06-21.
External links
[edit]- "Aspin Rotary Valve Engines". aspin.info. Retrieved 2025-06-26.
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