Effect of EGR contamination of diesel engine oil on wear.
Exhaust gas recirculation (EGR) is one of the effective means to reduce the NO{sub X} emission from diesel engines. Returning exhaust product to the diesel engine combustion chamber accelerated the degradation of the lubricant engine oil, primarily by increasing the total acid number (TAN) as well as the soot content and, consequently, the viscosity. These oil degradation mechanisms were observed in engine oil exposed to EGR during a standard Cummins M-l 1 diesel engine test. Four-ball wear tests with M-50 balls showed that, although the used oils slightly decrease the friction coefficients, they increased the ball wear by two orders of magnitude when compared to tests with clean oil. Wear occurred primarily by an abrasive mechanism, but in oil with the highest soot loading of 12%, scuffing and soot particle embedment were also observed. Laboratory wear tests showed a linear correlation with the TAN, while the crosshead wear during the engine test was proportional to the soot content.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- EE
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 971940
- Report Number(s):
- ANL/ES/CP-119408
- Journal Information:
- Wear, Journal Name: Wear Journal Issue: 1-6 ; Sep. 2007 Vol. 263
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Effect of thin-film coating on wear in EGR-contaminated oil.
The study of the effect of exhaust gas recirculation on engine wear in a heavy-duty diesel engine using analytical ferrography