圧縮点火複合燃料機関に関する研究 : 燃料噴射開始時期の機関性能および排出ガスに及ぼす影響

概要

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Engine performance and combustion characteristic of prechamber-type diesel engine operated by gas-oil and methanol were investigated experimentally. In particular, the effect of injection timing difference between the gas-oil and methanol on the combustion phenomena was analyzed. As a result, when the gas-oil was used as a fuel of pilot injection, the ignition lag was mainly controlled by that of gas-oil. The maximum thermal efficiency takes place with an optimum methanol injection timing as the main fuel. The optimum methanol injection timing is about 2 to 3 crank angle before the ignition, since methanol vapor is required for smooth combustion based on the experimental results that the methanol combustion was initiated by the flame propagation from the combustion of gas-oil. Furthermore, it is recommended that a part of the some sprays of gas-oil and methanol be mixed and also distributed closely.
社団法人日本機械学会の論文
1991-05-25