再循環排ガス中のSO_2がディーゼルエンジンの摩耗に与える影響について : SO_2の澗滑油膜への溶解過程と摩耗量の関係

概要

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In both spark ignition engines and diesel engines, the exhaust gas recirculation (EGR) system is well know as an effective technique to reduce nitric oxide emission. However, it has not been applied practically to heavy-duty diesel engines because wear of piston rings and cylinder liner is increased by EGR. It is widely considered that sulfur oxide in exhaust gas strongly relates to the wear. This paper presents a numerical model to reveal the mechanism of wear which estimates the amount of sulfur oxide diffused into lubricating oil film. The calculated results show that the sulfur oxide concentration in the oil layer is related strongly to the EGR rate, inversely with engine speed, and decreases under light load conditions. There is a good agreement between the results and the experimental facts.
一般社団法人日本機械学会の論文
1993-04-25