Throttle and inlet valves for 8 stroke and 4 stroke engines
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United States of America Patent
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Feb 26, 2008
Grant Date -
May 26, 2005
app pub date -
Jun 18, 2004
filing date -
Oct 28, 2003
priority date (Note) -
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Abstract
A `Blackburn Cycle` or 8 stroke and 4 stroke cycle change piston engine has a separate fuel/air inlet duct and valve in a cylinder where the throttle means admits a small volume, namely less than 10% of the cylinder capacity, needed for a low idling speed. A separate `air only` inlet duct and valve admits alternate `air only` inductions in each cylinder when less than half load is needed. The preferred plug type of throttle can be disc or cone shaped or shaped to substantially fill the volume between the closed throttle and the inlet valve seat. For higher power the throttle moves away from the inlet valve to open the inlet port. Fuel is injected into the small volume between the throttle and the inlet valve where engine heat helps vaporize the fuel without heating a large mass of the inlet air.
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