Patent
Regenerated internal combustion engine
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TLDR
A thermally regenerated four-stroke cycle internal combustion engine as discussed by the authors consists of a cold side cylinder having intake and exhaust valves independently located through cold-side cylinder wall, and a hot side cylinder with fuel injector and ignitor and hot side piston connected to said cold side piston through the crankshaft.Abstract:
A thermally regenerated four-stroke cycle internal combustion engine, comprises a cold side cylinder having intake and exhaust valves independently located through cold side cylinder wall, and a cold side piston connected through a connecting rod to a crankshaft; a hot side cylinder having fuel injector and ignitor and hot side piston connected to said cold side piston through the crankshaft; and a regenerator duct for housing a regenerator and for connecting cold and hot side cylinders.read more
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Compound regenerative engine
TL;DR: In this paper, an Ericsson-Stirling type engine with a semi-open regenerative working fluid system employing intermittent internal combustion is described, where the regenerator is modified to act also as a catalytic combustor and is located at the terminal end of the unswept clearance volume most adjacent the high temperature chamber or hot swept space.