| 摘要 |
PROBLEM TO BE SOLVED: To provide a free piston type stirling engine, of low cost, high efficiency, and high output, without using an expensive flexure spring. SOLUTION: Surface hardening treatment of DLC coating is applied to bearing surfaces of a power piston 2, a rod 4, etc., to reduce reciprocating and sliding loss, and improve bearing precision. A low-cost coil spring can be used instead of using a high-cost flexure spring. In addition, a displacer controller 33 is provided to function as a small motor and power generator at an end of a displacer rod 4a. Engine start becomes easy. Control to keep the power piston 2 and the displacer piston 3 at their optimum phases becomes possible in any operation state. In stationary operation, it can be added to main power generation output as the compact generator. Engine efficiency and output can be maintained high. COPYRIGHT: (C)2005,JPO&NCIPI
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