Abstract The impact of reducing friction losses on the fuel consumption and CO2 emissions was investigated through computational simulation of piston ring dynamics. Experimentally determined cylinder bore surface finishes, low viscosity oil and ring coatings response to oil additives were used as simulation inputs. Oil viscosity grades from SAE10W-40 to SAE0W-4 were considered. 3D roughness measurements of regular and “mirror-like” cylinder bores were used to estimate the flow factors coefficients for the average Reynolds equation and asperity contact stiffness. The combination of smooth cylinder bores, low viscosity oils with appropriate additives promoted ring pack FMEP reductions of up to 66% at part load and WOT with consequent CO2 reductions of up to 10% at part load and 1.5% at WOT.

中文翻译：

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用于减少活塞环缸孔组件上潜在乘用车 CO2 的润滑剂-表面系统组合方法

摘要 通过活塞环动力学的计算模拟，研究了减少摩擦损失对燃料消耗和二氧化碳排放的影响。实验确定的气缸孔表面光洁度、低粘度油和环涂层对油添加剂的响应被用作模拟输入。考虑了从 SAE10W-40 到 SAE0W-4 的油粘度等级。规则和“镜面”气缸孔的 3D 粗糙度测量用于估计平均雷诺方程和粗糙接触刚度的流动系数系数。光滑的气缸孔、低粘度油和适当的添加剂相结合，在部分负载和 WOT 下将环组件 FMEP 降低了高达 66%，从而在部分负载下减少了高达 10% 的 CO2，在 WOT 时减少了 1.5%。