OS4-3 高効率マイクロガスコジェネレーション用ガスエンジンへのHCCI適用研究(OS4 省エネルギー・小型分散電源・コジェネ技術,循環型社会における動力エネルギー技術)

概要

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The micro co-generation system of 20kW class is operated by a engine with spark ignition engine by using natural gas. Thermal efficiency of engine is needed to improve because CO2 must be reduced. HCCI can realize high thermal efficiency with low NO_x, but as selfignition temperature is high it is hard to control ignition timing. Compression ratio was changed from 12 to 25 and intake temperature was controlled. On comparison between HCCI and spark ignition, in the case of HCCI, thermal efficiency is high and NO_x is very low at rated output, but CO, THC and inlet temperature are very high at low load. However, in the case of spark ignition, thermal efficiency HC, CO and inlet temperature are low and at high load NO_x is high. The control method that at low load engine runs with spark ignition and at high load engine runs with HCCI is practical.
一般社団法人日本機械学会の論文
2007-06-13