潤滑油中の溶解燃料が火花点火機関における未燃焼炭化水素の排出に与える影響 : 第2報,計算モデルによる動的効果の検討

概要

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Absorption and desorption of fuel by motor oil that coats the cylinder side wall with a thin oil film are thought to be one of the important sources of unburnt hydrocarbon emissions from spark ignition engines. A simplistic model which describes the dynamic process of fuel absorption and desorption in the thin oil film has been developed. Calculated results show that the rate of the absorption and desorption process is comparable to the engine motion and the amount of unburnt fuel emitted from the oil film depends on the position of the film, rotating speed, diffusion coefficient, oil layer thickness, existing cycles of the oil layer and initial fuel concentration in the motor oil. It is also demonstrated that the present model connected sequentially with the models of the cylinder pressure,the ring gas pressure and the oil layer thickness is available to estimate the dynamic process in the engine given its specifications and operating conditions.
一般社団法人日本機械学会の論文
1989-09-25