天然ガス予混合圧縮自己着火機関の性能および排気特性(熱工学,内燃機関,動力など)

概要

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An experimental study was performed to clarify the operation condition on natural gas fueled homogeneous charge compression ignition engine. Using a single cylinder engine, operation range, engine performance and exhaust emissions were measured under various intake air temperature, compression ratio and equivalence ratio. Under the high intake air temperature, combustion efficiency is high, but under lower temperature, engine was operated in narrow A/F range. The use of high compression ratio, engine was operated at lower intake air temperature. To keep combustion efficiency over 80% and NO_x emission under 10ppm, maximum in-cylinder temperature should be controlled within the narrow range between 1500K and 1800K. Natural gas auto-ignited over 1000K and the effect of A/F was low. Auto ignition temperature was decreased according to the decline of intake air temperature.
一般社団法人日本機械学会の論文
2004-06-25