The influence of MoS2 on the mechanism of pistonring wear during the runningin process

This report presents the results of a comparative test in which two similar new engines were runin under identical conditions except that in one case a molybdenum disulphide suspension in oil was used as a crank case lubricant. The special testing rig is described and the results are presented in te...

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Bibliographic Details
Published in:Industrial lubrication and tribology 1999-12, Vol.51 (6), p.274-286
Main Authors: Braithwaite, E.R., Greene, A.B., Train, B.M.
Format: Article
Language:English
Subjects:
Friction
Wear
Online Access:Get full text
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Summary:This report presents the results of a comparative test in which two similar new engines were runin under identical conditions except that in one case a molybdenum disulphide suspension in oil was used as a crank case lubricant. The special testing rig is described and the results are presented in terms of comparative wear rates, determination of final ring profiles and SEM analyses of final ring surfaces. From this investigation it is concluded that the molybdenum disulphide additive is effective in modifying the mechanism of wear during runningin so that metaltometal contact is reduced and the change in surface topography is achieved mainly by plastic deformation rather than by an adhesive or abrasive wear process which mainly occurs when using conventional breakin oils.
ISSN:0036-8792
DOI:10.1108/00368799910294779