External combustion rotary engine

Details External combustion rotary engine External combustion rotary engine

1986-08-06

1988-08-02

Koczo, Michael

Power plants

Internal combustion type free piston device supplies motive...

123228, 418 612, F02B 7104

Patent

active

047607017

ABSTRACT:
An external combustion rotary engine comprising a motor member, a free-piston combustion member and a storage tank serving also as a heat exchanger and located between the motor and the combustor. The motor rotors rotate inside an enveloping structure eccentrically with respect to a power shaft to form alternatively compression and expansion chambers. Compressed air produced thereby is ducted first to the storage tank and then to the combustor for burning fuel to produce combusted gases which are in turn ducted to the storage tank where heat is exchanged between the hot gases and the cooler compressed air. The combusted gas is then expanded in the expansion chambers. A fraction of the compressed air is further compressed to a higher pressure level so that it may be used in air pad cushions to isolate the various engine rotating parts from the fixed structures surrounding them. The use of such air cushions prevents contacts between moving parts and eliminates friction, heat production therefrom and wear. The need for lubrication is thus also eliminated. The "externally" performed fuel combustion is much slower than in comparable internal combustion rotary engines. This results in higher combustion efficiencies, lower combustion temperatures and lower rates of production of pollutants such as NO.sub.x.

REFERENCES:
patent: 4015424 (1977-04-01), Shinohara
patent: 4399654 (1983-08-01), David
patent: 4672813 (1987-06-01), David

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