Internal-combustion engines – Free piston – Single chamber; one piston
Patent
1991-01-16
1992-09-08
Wolfe, Jr., Willis
Internal-combustion engines
Free piston
Single chamber; one piston
123 65E, F01B 1100
Patent
active
051449170
ABSTRACT:
This gas pressure generating engine has a totally unconnected piston running between a combustion chamber and a rebounding volume. The piston uncovers the outlet port after moving a short distance from the combustion chamber and utilizes the rest of the piston's long stroke to draw in new air; and after turning around at the stroke's end to pump to the outlet a large part of the drawn-in air. The remainder of the drawn-in air is further compressed for combustion. The stroke of the piston is restricted only by the energy it receives from the combustion chamber. The rebounding volume's pressure is adjustable to adjust the pressure-volume ratio of the outlet gas. A tuned valve in the outlet and a tuned blowdown tube maximize gas momentum scavenging of the combustion chamber to improve the efficiency and extend the operating range.
REFERENCES:
patent: 1036288 (1912-08-01), Matricardi
patent: 2995122 (1961-08-01), Randall
patent: 3119230 (1964-01-01), Kosoff
patent: 4705460 (1987-11-01), Braun
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