CLOSED-CYCLE PISTON ENGINE Russian patent published in 2015 - IPC F02G1/44 

FIELD: engines and pumps.

SUBSTANCE: claimed engine comprises heater, working cylinder with piston, rod and con rod, compressor cylinder with piston, rod and con rod, crankshaft, head end regenerator, cooler, rod end intake valve, head end intake valve, head end intake bang-bang valve, head end discharge bang-bang valve. Working cylinder can be heated while compressor cylinder can be cooled. Working cylinder diameter is larger than that of compressor. Claimed engine represents a dual-action closed heat cycle engine like that classic Ericsson engine with theoretical efficiency of up to 70%. Closed heat cycle allows applying the working fluid that can be nitrogen, carbon dioxide, inner gases, their mixes and other gases. Working fluid is heated in common boiler and working cylinder while it is cooled in closed heat cycle at working gas initial pressure higher than barometric pressure.

EFFECT: higher power output per engine unit weight and engine efficiency.

1 dwg