Power plants – Motor operated by expansion and/or contraction of a unit of... – Unit of mass is a gas which is heated or cooled in one of a...
Patent
1984-03-27
1987-06-30
Ostrager, Allen M.
Power plants
Motor operated by expansion and/or contraction of a unit of...
Unit of mass is a gas which is heated or cooled in one of a...
60682, 60650, F02G 104
Patent
active
046760679
ABSTRACT:
An improved crank driven reciprocating piston hot gas engine in which virtually the entire working gas mass performs the same Ericsson cycle loop, thereby achieving maximized thermal efficiency. The invention engine embodiments consist of paired hot and cold cylinders, connected together through leak sealed flow paths with included valves and regenerator. Embodiments are presented for both the open cycle and closed cycle operations. The improvements consist of relative piston crank positioning and timed valve operation such that the working gas that started the isothermal expansion in a hot cylinder essentially remains in that hot cylinder for the entire duration of the isothermal expansion step, and the working gas that started the isothermal compression in a cold cylinder essentially remains in that cold cylinder for the entire duration of the isothermal compression step. The second improvement concerns the heat transfer within the cylinders. In the invention embodiments heat transfer area is generated inside the cylinders, within the volumes swept by the pistons, thus minimizing the void or dead space inside the cylinders.
REFERENCES:
patent: 3867816 (1975-02-01), Barrett
patent: 4077221 (1978-03-01), Maeda
patent: 4487020 (1984-12-01), Dineen
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