メタノ-ルエンジンの潤滑特性

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Methanol-fueled diesel engines have some technical problems. Lubrication trouble is one of them.<BR>Authors investigated effects of alcohol injection on lubrication condition between the piston rings and the cylinder liner on a large size test rig in order to clear problems before tests on a large size single cylinder test engine (bore : 250mm, stroke : 250mm), such as the adaptability of lubricating oil.<BR>As a result of this test which simulates the mechanism of a piston ring and a cylinder liner on a engine, alcohol injection on the sliding surface causes the improvement of lubricating performance.<BR>On the methanol engine, a result is shown that appropriate lubricating oil should be used in order to prevent the lubrication trouble. And (1) contamination and dilution of lubricating oil are not found, (2) abnomal wear of the piston rings and cylinder liner are not found, (3) the combustion chamber parts are clean and adhesion of carbon on them is less than oil burning engines, and (4) lower base number lubricating oil should be used on the methanol engine than oil burning engines.
公益社団法人日本マリンエンジニアリング学会の論文