Abstract:To achieve the purposes of bearing working reliable and durable, tribology and engine CAE technology were applied to analyze the bearing special pressure, bearing orbit and minimum film thickness in bearing clearance limit state, and reliability of the bearing lubrication was evaluated. The results show that, the minimum film thickness of main bearings are decreased with engine speed increased in engine body and boundary conditions unchanged, which the connecting rod bearings are increased first and then decreased. The minimum film thickness of maximum bearing clearances is 40% larger than that of minimum bearing clearances, the phenomenon of dry friction is not met, lubrication performance of corrugated bearing shell is better than that of flat bearing.