Effect of Finishing Grade on the Wear of Diesel Engine Cylinder Wall

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  • ディーゼル機関のシリンダ壁仕上程度が摩耗に及ぼす影響
  • ディーゼル キカン ノ シリンダ カベシアゲ テイド ガ マモウ ニ オヨボス エイキョウ

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To make fully sure about the effect of honing, the authors tested with a diesel engine which had both fine-bored and honed cylinders. Careful investigations were made on 1) cylinder : amount of wear (as measured by the air micrometer), roughness 2) pistion : amount of wear of piston and ring grooves, distribution of temperature 3) pistion ring : amount of wear, tension, distribution of pressure, movement in cylinder, roughness 4) compression pressure. After one year and a half measurement, the following conclusions have been reached : 1) Wear of honed cylinder is smaller than that of fine-bored cylinder at initial stage, but with regard to total wear, there is no difference between them. 2) In other respects, there is no difference between them either. 3) So honed ordinary cast iron cylinders shorten fitting time, but fine-bored cylinders serve the purpose in other respects.

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