Internal-combustion engines – Free piston – Single chamber; one piston
Patent
1997-07-01
1998-07-07
Okonsky, David A.
Internal-combustion engines
Free piston
Single chamber; one piston
F02B 7100
Patent
active
057752737
ABSTRACT:
A free piston internal combustion engine having improved valve timing. A pair of oppositely disposed combustion chamber passageways extending between the combustion chamber and the earth's atmosphere, each have a combustion chamber valve for controlling the passage of gas through the passageways. The combustion chamber valves are essentially simultaneously opened and closed to permit independent variation and control of the compression ratio, expansion ratio, and stroke of the engine. When the valves are opened, the combustion chamber is purged or supercharged with combustion supporting air, and closed to initiate compression. Variable control of the piston positions at which the valves are opened and closed permits the engine to operate at a high efficiency over a broad range of power output loading conditions.
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Foster Frank H.
Okonsky David A.
Sunpower, Inc.
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