Abstract: A new numerical algorithm which combines the Newton-Raphson scheme and low relaxation iteration is presented in this paper. The new numerical algorithm has a wide parameter range and high convergence speed. Through a host of numerical simulation for various transient EHD lubrication, some characteristics of transient EHD lubrication are investigated and an interesting phenomenon-two spikes in pressure distribution-is discovered. As an example of application, the transient EHD lubrication of a compound cycloid cam-tappet pair in 1.C.engine is calculated. The results demonstrate that the application of the new numerical algorithm for the transient EHD lubrication process of cam-tappet is successful.

Key words: 非稳态弹流润滑, 非稳态润滑, 线接触弹流润滑