メタン発酵ガスを燃料とする火花点火エンジンの出力特性

（水素添加の影響）

抄録

Output power characteristics of a spark ignition engine fueled with the methane fermentation gas, which is methane and CO₂ mixture, were experimentally studied. Ammonia, byproduct of the methane fermentation, was decomposed into hydrogen and nitrogen through the electrolysis processing proposed in this study. Then hydrogen addition to the fermentation gas is supposedly improves the engine performance including the output power and thermal efficiency. To ensure this improvement with the hydrogen addition, the engine performance experiment was conducted with the ethane, CO₂ and hydrogen gas mixture from the pure-gas cylinders. The hydrogen addition improves the engine output power and thermal efficiency especially in the lean mixture (high excess air ratio) condition.