Rotary valve drive mechanism
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United States of America Patent
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Jan 27, 1998
Grant Date -
N/A
app pub date -
Jul 22, 1996
filing date -
Jul 22, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
An improved drive mechanism for rotary valves of the type used in internal combustion engines indexes the valves in selected attitudes of rotation to align the valve passage with an inlet or exhaust port and hold the valve in alignment for a selectable duration of crankshaft rotation. In like fashion, the valves are also indexed to close off an inlet or exhaust port for a selected duration of crankshaft rotation. Flow into and out of an engine cylinder is improved because each valve is held for a longer period of time in a full open position. while compression and power strokes are made more efficient by the gas seal maintained while the valves are positioned to close off the intake and exhaust ports.
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