The mobility method is frequently used to analyze the performance of journal bearings subjected to dynamic loads in an internal combustion engine. As the mobility method generally assumes Newtonian fluid, the realistic approach for the multigrade lubricant in engine bearing lubrication is limited. The new mobility approach for non-Newtonian fluid is introduced in this study. A power-law model is applied to describe the behavior of a real non-Newtonian fluid. Additionally, the mobility method for a finite length bearing is developed to estimate the eccentricity ratio for realistic engine bearing dimensions. The new mobility model provides sufficient accuracy and solution details comparable to finite element analysis and experiments while maintaining computational efficiency. Consequently, the realistic approach of the bearing friction analysis is suggested by the eccentricity ratio that can be predicted by the mobility model with finite length bearing and non-Newtonian fluid conditions.

流动性方法通常用于分析内燃机中承受动态载荷的轴颈轴承的性能。由于迁移率方法通常采用牛顿流体，因此在发动机轴承润滑中使用多级润滑剂的实际方法受到限制。本研究介绍了用于非牛顿流体的新迁移率方法。应用幂律模型来描述实际的非牛顿流体的行为。此外，开发了一种用于有限长度轴承的移动性方法，以估算实际发动机轴承尺寸的偏心率。新的移动性模型提供了与有限元分析和实验相当的足够的准确性和解决方案详细信息，同时保持了计算效率。所以，