Patent ID: 7644581
Filing Date: 2010-01-12
Classification: F01N,F02G,Y02T

Abstract:
1. A stirling engine of a two-piston type in which a working fluid 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 compression-space-side path that communicates the compression space with a crankcase when a power piston of the low-temperature side cylinder is positioned at a lower dead point side, to allow the working fluid to flow only in a direction from the crankcase to the compression space; a compression-space-side valve that is arranged in the compression-space-side path; an expansion-space-side path that communicates the expansion space with the crankcase; an expansion-space-side valve that is arranged in the expansion-space-side path; and a check valve that is arranged in the expansion-space-side path to allow the working fluid to flow only in a direction from the expansion space to the crankcase, the compression-space-side valve being caused to be closed and the expansion-space-side valve being caused to be open when the output of the stirling engine is decreased, and the expansion-space-side valve being caused to be closed and the compression-space-side valve being caused to be open when the output of the stirling engine is increased.