日本舶用機関学会誌
Online ISSN : 1884-4758
Print ISSN : 0388-3051
燃料噴射系の電子制御化による舶用ディーゼル機関の排気ガス特性の改善
―A重油使用時の運転結果
張 潔高杉 喜雄桑原 孫四郎菊地 正晃西尾 澄人石村 惠以子中島 康晴菅 進
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2000 年 35 巻 12 号 p. 841-847

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An electronically controlled system for fuel injection is one of techniques to improve thermal efficiency and to reduce harmful emissions simultaneously. The authors applied an electronically controlled system to a diesel engine, a 3-cylinder medium speed 4-cycle engine of 257 kW/420 rpm at maximum continuous output power.
On the system, the fuel injection pump is driven by hydraulic pressure and the hydraulic pressure line is electronically controlled to change fuel injection timing. Fuel injection profiles different from that of a camshaft are also obtained.
The test engine was operated over 25% load to 100% load of maximum continuous output with a propeller law. At low load conditions, thermal efficiency, NOx emission and PM emission characteristic could be improved simultaneously, by optimization of injection timing. Regarding PM emission, it was improved drastically throughout the whole engine load range, which is considered to be caused by that the increase in pressure rising speed improved atomization characteristics at initial period of injection.

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