Internal combustion engine with elevated expansion ratio

Details Internal combustion engine with elevated expansion ratio Internal combustion engine with elevated expansion ratio

F - Mech Eng,Light,Heat,Weapons

02

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F02D 15/00 (2006.01) F01L 1/44 (2006.01) F02B 15/00 (2006.01) F02D 13/02 (2006.01)

Patent

CA 2501674

An Elevated Expansion-Ratio Internal Combustion Engine has a substantially standard repeating four-stroke sequence for each cylinder, and the Engine includes for each cylinder: an intake valve, a combustion-gas exhaust valve, and a vapor return valve. A return manifold for vapor connects from the return valves of respective ones of the cylinders back into a passage ahead of a beginning portion of an intake manifold. Substantially during a predetermined part of each compression stroke in the sequence of strokes, the return valve opens after a closing of the intake valve, and thereafter closes at a time within the compression stroke corresponding to a predetermined position of the piston in the cylinder.

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