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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Effect of cylinder deactivation on the tribo-dynamics and acoustic emission of overlay big end bearings
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Effect of cylinder deactivation on the tribo-dynamics and acoustic emission of overlay big end bearings

机译：气缸停用对重叠式大端轴承的摩擦动力学和声发射的影响

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The paper presents an integrated tribo-dynamics analysis of elliptic bore overlay big end bearings of internal combustion engines. The analysis focuses on bearing stability, frictional power loss and acoustic emission from these bearings, particularly with cylinder deactivation with larger fluctuations in engine loading. The integrated approach represents a tribo-dynamics analysis, not hitherto reported in literature, particularly under cylinder deactivation. The analysis shows that cylinder deactivation makes marginal differences in parasitic frictional losses in engine bearing performance and any significant gain would depend on the brake specific fuel consumption. It is also shown that sufficient swept volume with retained residual exhaust gas charge within the deactivated cylinders can ensure bearing whirl stability. Partially deactivated engine configurations exhibit a lower average steady noise emission, but with a higher degree of transient content. This suggests that there would be a greater contribution to engine rumble with deactivated cylinders.
机译：本文对内燃机的椭圆孔覆盖大端轴承进行了综合摩擦动力学分析。分析的重点是这些轴承的轴承稳定性，摩擦功率损失和声发射，尤其是在发动机负载波动较大的情况下，气缸停用时。集成方法代表了摩擦动力学分析，这是迄今文献中未报道的，特别是在气缸停用时。分析表明，气缸停用使发动机轴承性能中的寄生摩擦损失略有不同，任何明显的收益都将取决于制动器的特定燃料消耗。还显示出，在停用的气缸内具有足够的吹扫容积和残留的残余废气充注量可以确保轴承旋转稳定性。部分停用的发动机配置显示出较低的平均稳定噪音排放，但过渡成分含量较高。这表明在停用气缸的情况下，发动机的隆隆声将有更大的贡献。

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