Patent ID: 7581393
Filing Date: 2009-09-01
Classification: F01N,F02G,Y02T

Abstract:
1. A stirling engine of a two-piston type in which a working gas reciprocates between a compression space which is a working space of a low-temperature side cylinder and an expansion space which is a working space of a high temperature side cylinder, comprising: a flow path that communicates the working space of the stirling engine and outside of the stirling engine; check valves which are arranged in the flow path to allow a flow only in a direction from the outside of the stirling engine to the compression space; a valve that is arranged in the flow path closer to the outside of the stirling engine than the check valves; and a piston pump that is arranged between two of the check valves and can supply pressurized working gas to the flow path, in addition to a low-temperature side piston of the low-temperature side cylinder and a high-temperature side piston of the high temperature side cylinder; wherein a crank shaft of the piston pump is integrally formed with a crank shaft of the stirling engine, and a phase of an intra-cylindrical pressure of the piston pump is opposite to a phase of an intra-cylindrical pressure of the sterling engine which is a combined wave of a pressure waveform of the compression space and a pressure waveform of the expansion space.