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Influence of cylinder wet in a direct injection gasoline engine on piston ring lubrication
Published October 17, 2000 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
In a direct injection gasoline engine, cylinder wet with fuel is thought to cause a serious problem on piston ring lubrication. To clarify the influence, we have examined oil dilution, piston ring wear and oil film distribution around piston by using piston land oil sampling system, R.I. tracer technique and 2-dimensional fluorescence technique. Then, we have found that the increase of cylinder wet does not directly cause the piston ring wear. It was thought that the cylinder wet furthered supplying the cylinder bore with lubrication oil. These facts suggest that a piston ring durability test only at a driving condition of large amount of cylinder wet is caused may not be sufficient to certify the confidence of D.I. gasoline engine lubrication.