固体潤滑剤分散樹脂オーバーレイを成膜した曲面すべり軸受の摩擦特性

抄録

In internal combustion engines, the number of repetitions of start and stop is increasing due to the introduction of idling stop system, and reduction of the friction and improvement of seizure resistance are strongly demanded. Overlay technology is one of the effective means for these problems in journal bearings. This study describes tribological properties of curved plain bearings with polymer overlay containing solid lubricant, such as molybdenum disulfide powder and graphite powder. Polymer overlays were coated on bearing metals by roll coating method. Interval friction tests were carried out by repeating start and stop, and the friction characteristics were evaluated by the maximum value of the friction coefficient at the start of each cycle. As a result, in the case of the overlays containing 40 vol% of graphite, friction coefficient at the start of each cycle showed low from the beginning and gradually decreased.