Effect of Thin-Film Coating on Wear in EGR-Contaminated Oil

2002-01-1920

06/03/2002

Event
Future Car Congress
Authors Abstract
Content
Increased use of higher-efficiency compression ignition direct injection (CIDI) diesel fueled engines instead of today's gasoline engines will result in reduced fuel consumption and greenhouse gases emissions. However, nitrogen oxides (NOx) and particulate exhaust emissions from diesel engines must be significantly reduced due to their possible adverse health effects. Exhaust gas recirculation (EGR) is an effective way to reduce NOx emissions from diesel engines, but the particulates and acidic exhaust products in the recirculated gas will contaminate engine lubricant oil by increasing the soot content and total acid number (TAN). These factors will increase the wear rate in many critical engine components and seriously compromise engine durability. We have investigated the use of commercially available thin and hard coatings (TiN, TiCN, TiAlN, and CrN) to mitigate the negative effects of EGR on wear. In friction and wear tests with the four-ball machine, we found that all the four coatings deposited on M-50 steel significantly reduced wear in EGR-contaminated oils when compared with uncoated M50 steel balls.
Meta TagsDetails
DOI
https://doi.org/10.4271/2002-01-1920
Pages
9
Citation
Ajayi, O., Aldajah, S., Erdemir, A., and Fenske, G., "Effect of Thin-Film Coating on Wear in EGR-Contaminated Oil," SAE Technical Paper 2002-01-1920, 2002, https://doi.org/10.4271/2002-01-1920.
Additional Details
Publisher
Published
Jun 3, 2002
Product Code
2002-01-1920
Content Type
Technical Paper
Language
English