Thermal cycle for operation of a combustion engine

Details Thermal cycle for operation of a combustion engine Thermal cycle for operation of a combustion engine

1995-04-04

1996-09-03

Freay, Charles

Power plants

Internal combustion type free piston device supplies motive...

60 396, 60 3955, F02B 7104

Patent

active

055512330

ABSTRACT:
A cycle for an external combustion engine having two external variable volume combustion chambers, each with a floating piston. A compressor provides pressurized gas selectively to a first or second end of the combustion chambers. The introduction of the pressurized gas into one end of the combustion chamber forces the floating piston to move to the opposite end. When a predetermined combustion chamber pressure is obtained combustion of previously injected fuel is initiated. At a peak pressure, water is injected in the combustion chamber increasing the pressure further. Valves at either end of the combustion chamber selectively and controllably release the pressure from the combustion chamber depending upon which end the floating piston is located. The pressure released from the combustion chamber is used to drive a plurality of pistons or a turbine, thereby creating useful work such as rotating a shaft. A rotating shaft is used to drive the compressor for supplying the pressurized air to the combustion chamber. Combustion and the release of the combustion gases is alternated from one end of the combustion chamber to the other, and with the use of at least two combustion chambers provides continuous operation. The present invention provides more efficient operation and a more controlled combustion chamber environment resulting in reduced pollution and greater efficiencies.

REFERENCES:
patent: 2299905 (1942-10-01), Kennon
patent: 4015424 (1977-04-01), Shinohara
patent: 4205528 (1980-06-01), Grow
patent: 4558665 (1985-12-01), Sandberg et al.
patent: 4589377 (1986-05-01), Van Dal
patent: 4815294 (1989-03-01), David
patent: 5237964 (1993-08-01), Tomoiu

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