舶用エンジンに及ぼす燃料重質化の影響とエンジン油からの対応

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In recent years, the quality of marine bunker fuel oil has been deteriorating and is anticipated to be poorer in the future.<BR>Although it is anxious that there must be happened many of considerable problems caused by degraded fuels, the more advanced technology of design and materials, including engine oil, on marine diesel engine is expected to solve such problems.<BR>This paper describes the influence of fuel deterioration against engine lubrication, and various charts and graphs show the effects of TBN and additive arrangement of engine oils on piston deposit and wear reduction.<BR>For this investigation, two types of test engine were applied, i.e. a Bolnes engine for cylinder lubricant of the crosshead diesel engine and a single cylinder Caterpillar test engine for the mediumspeed trunk piston diesel engine oil. And as for fuels in these engine tests, three grades of residual fuels in viscosity were burnt, i.e. IF 100, 180 and 380.<BR>In the last part of this paper, oxidative degradation tendency among three types of system oil; premium type, HD type and so-called mini-HD type in Bolnes engine test is discussed.
公益社団法人日本マリンエンジニアリング学会の論文