Two-stroke cycle internal combustion engine

Details Two-stroke cycle internal combustion engine Two-stroke cycle internal combustion engine

1989-11-08

1991-09-24

Koczo, Michael

Power plants

Fluid motor means driven by waste heat or by exhaust energy...

With supercharging means for engine

123 65VC, 123 74R, 123197AC, 123316, 60269, F02B 3700, F02B 3312, F02B 4104, F02B 7532

Patent

active

050503847

ABSTRACT:
A power plant has an internal combustion engine with piston backside pumping and a stroke of sufficient length to reduce the pressure of the combustion gases at the end of the power stroke to substantially a common inlet and exhaust pressure, extracting maximum power from the combustion gas expansion and reducing both power loss from expansion into the exhaust manifold and exhaust noise. For a cylinder the exhaust valve is opened at a specific time relative to the engine cycle, but exhaust closing is variable to account for changes in operating conditions and power settings. In a preferred embodiment the engine is a two-cycle compression-firing engine, and an exhaust valve for a cylinder is opened by cam action but closed at a variable time by an actuator controlled by a computer. In a further preferred embodiment the long-stroke engine is combined with an exhaust turbine, a compressor, an inlet duct, an acceleration nozzle, and a radiator in a power plant to maximize power and efficiency, and applied to aircraft propulsion.

REFERENCES:
patent: 2097883 (1937-11-01), Johansson
patent: 2218522 (1940-10-01), Butler
patent: 2339510 (1944-01-01), Olsson et al.
patent: 2817322 (1957-12-01), Miller
patent: 3309865 (1967-03-01), Kauffmann et al.
patent: 3935846 (1976-02-01), Zelenka

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