The Role of Hydroperoxide in Engine Wear and the Effect of ZnDDP/Dispersant/Detergent Interactions

872157

11/01/1987

Event
1987 SAE International Fall Fuels and Lubricants Meeting and Exhibition
Authors Abstract
Content
Engine wear, particularly that of the valve train, was examined in motored 2.2L and 2.3L engines. Procedures were developed which involved addition of synthetic hydroperoxide to the crank-case oil to simulate fired engine conditions. Cam lobe and follower wear occurred, apparently as a result of direct attack by the hydroperoxide on rubbing surfaces. This type of hydroperoxide-induced wear was identified in a fired bench engine test and in a field test. Similar hydroperoxide-induced wear was also observed in the lesser loaded engine contact areas such as bearings. Phosphorus nuclear magnetic resonance (NMR) has proven to be a useful tool to the understanding of the structure and antioxidant antiwear properties of ZnDDP and its interactions with dispersant/detergent combinations.
Meta TagsDetails
DOI
https://doi.org/10.4271/872157
Pages
16
Citation
Habeeb, J., Rogers, W., and May, C., "The Role of Hydroperoxide in Engine Wear and the Effect of ZnDDP/Dispersant/Detergent Interactions," SAE Technical Paper 872157, 1987, https://doi.org/10.4271/872157.
Additional Details
Publisher
Published
Nov 1, 1987
Product Code
872157
Content Type
Technical Paper
Language
English