302 DMEハイブリッド機関に関する基礎的研究(OS3-(3)オーガナイズドセッション《熱・流体・エネルギー変換工学の進展》)

概要

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Recently, the internal combustion engine are require to use alternative fuels and to improve the thermal efficiency because of controlling escalating prices of crude oil and reducing carbon dioxide emissions. We propose DME hybrid engine which can solve these problems at the same time. DME can be made from various resources. At the start up and low load, this engine is operated on the compression ignition using high cetane number of DME. While, at the middle and high load, it's operated on the spark ignition fueled by hydrogen and carbon monoxide reformed from DME. The latter can recover the exhaust heat using the endothermic reaction. In conclusion, this engine is improved the thermal efficiency by reducing pumping loss at the low road, increasing the compression ratio utilizing the high self ignition temperature of reformed gases, burning lean mixture by hydrogen enrichment, and recovering the exhaust heat. In this report, we researched the exergy efficiency and the output characteristics at the spark ignition operation.
一般社団法人日本機械学会の論文
2011-08-26