Internal-combustion engines – Adjustable combustion chamber – Piston in head adjusted
Reexamination Certificate
2008-01-29
2008-01-29
Cronin, Stephen K. (Department: 3747)
Internal-combustion engines
Adjustable combustion chamber
Piston in head adjusted
C123S256000, C123S289000, C123S568110
Reexamination Certificate
active
07322321
ABSTRACT:
An Elevated Expansion-Ratio Internal Combustion Engine has a substantially standard repeating four-stroke sequence for each of a plurality of cylinders. The head of each cylinder has an intake valve, a combustion-gas exhaust valve, and a vapor return valve. A return manifold for vapor connects from respective ones of the cylinders via a plurality of valve assemblies, each of which includes the return valve, into a passage ahead of a beginning portion of an intake manifold. Each valve assembly also has a discharge valve coupled to the return valve via a holding tank for cylinder vapor or gas. Valve stems of the discharge and return valves are coaxial in a single section valve housing or spaced-apart in a two-section valve housing. A quantity of the vapor is received into the holding tank during the compression stroke, and subsequently transferred via the discharge valve to the return manifold.
REFERENCES:
patent: 3878826 (1975-04-01), Date
patent: 4192265 (1980-03-01), Amano
patent: 6907859 (2005-06-01), Robinson
Cronin Stephen K.
Harris Katrina B.
Warren David M
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