Wear Evolution Prediction and Experimental Validation
of Engine Cam-Roller Pair

doi:10.3969/j.issn.1001-2222.2025.05.001

Vehicle Engine ›› 2025, Vol. 0 ›› Issue (5) : 1. DOI: 10.3969/j.issn.1001-2222.2025.05.001

Wear Evolution Prediction and Experimental Validation of Engine Cam-Roller Pair

LI Le¹,LV Bugao²,GAO Honglei¹,TAO Chunsheng¹,MENG Xianghui²

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Abstract

The cam-roller friction pair in the valve train of commercial vehicle engines belongs to high contact pairs, and surface wear failure often occurs during operation. On the one hand, under the elastohydrodynamic lubrication state, the surface of cam-roller bears extremely high oil film pressure and alternating loads, which makes it susceptible to fatigue wear. On the other hand, due to the presence of localized micro-protrusion contact and sliding friction, abrasive wear occurs between the cam and roller, especially in a slipping state. Traditional research typically evaluates the wear reliability of cam-roller pair through engine endurance testing, which is highly time-consuming and costly. Therefore, based on the coupling modeling of mixed thermal elastohydrodynamic lubrication and wear process of cam-roller pair, a wear evolution prediction method for cam-roller pair was proposed, which realized the prediction of cam-roller wear depth under cumulative working conditions. Through a 2 000 h engine bench durability test, it was found that the predicted wear evolution of the cam-roller pair was highly consistent with the experimental results, proving that the proposed method had the potential to replace high-cost durability tests and predict the wear life of cam-roller.

Key words

vehicle engine / cam / roller / friction pair / wear / mixed thermal elastohydrodynamic lubrication / prediction model

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LI Le, LV Bugao, GAO Honglei, TAO Chunsheng, MENG Xianghui. Wear Evolution Prediction and Experimental Validation of Engine Cam-Roller Pair[J]. Vehicle Engine. 2025, 0(5): 1 https://doi.org/10.3969/j.issn.1001-2222.2025.05.001