This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Numerical Modeling of the Contamination of Engine Oil by Fuel Combustion Byproducts
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 13, 2014 by SAE International in United States
Annotation ability available
This paper focuses on the fuel contribution to crankcase engine oil degradation in gasoline fueled engines in view of insoluble formation. The polymerization of degraded fuel is responsible for the formation of insoluble which is considered as a possible cause of low temperature sludge in severe vehicle operating conditions. The main objective of the study is to understand the mechanism of formation of partially oxidized compounds from fuel during the combustion process, before their accumulation in the crankcase oil. A numerical method has been established to calculate the formation of partially oxidized compounds in spark ignition engines directly, by using 3D CFD. To further enable the possibility of running a large number of simulations with a realistic turn-around time, a coupled approach of 3D CFD (with simplified chemical mechanism) and 0D Kinetics (with full chemical mechanism) is proposed here. Information such as pressure, air-fuel ratio, temperature at the time when the flame approaches the wall is extracted from 3D CFD and is applied as initial condition in the detailed analysis of 0D Closed Homogeneous Reactor(CHR) model for the formation of partially oxidized compounds. By using this approach, spatial variation around the combustion chamber can be easily evaluated by sweeping parameters such as pressure, temperature and equivalence ratio, etc. in 0D chemical kinetic calculations.
CitationShieh, T., Yamashita, K., Nitulescu, O., Hirano, S. et al., "Numerical Modeling of the Contamination of Engine Oil by Fuel Combustion Byproducts," SAE Technical Paper 2014-01-2574, 2014, https://doi.org/10.4271/2014-01-2574.
- Mougey , H. Hot-Engine Sludge and its Control SAE Technical Paper 450168 1945 10.4271/450168
- Rogers , D. , Rice , W. , and Jonach , F. Mechanism of Engine Sludge Formation and Additive Action SAE Technical Paper 560067 1956 10.4271/560067
- Roby , Stephen H. , Kornbrekke Ralph E. , and Supp James A. Deposit formation in gasoline engines: Part 2. Dispersant effects on sequence VE deposits Lubrication engineering 50.12 1994
- Willis , R. and Ballard , E. Control of Low-Temperature Sludge In Passenger-Car Engines SAE Technical Paper 550293 1955 10.4271/550293
- Roby , Stephen H. , Kornbrekke Ralph E. , and Supp James A. Deposit formation in gasoline engines: Part 1. Base oil effects on sequence VE deposits Lubrication engineering 50.12 1994
- Watson , S. , Wong , V. , Brownawell , D. , Lockledge , S. et al. Oil Conditioning as a Means to Minimize Lubricant Ash Requirements and Extend Oil Drain Interval SAE Technical Paper 2009-01-1782 2009 10.4271/2009-01-1782
- Mackney , D. , Calder , R. , Macduff , M. , Martin , W. et al. Reducing Deposits in a DISI Engine SAE Technical Paper 2002-01-2660 2002 10.4271/2002-01-2660
- Osawa , M. , Ebinuma , Y. , Sasaki , S. , Takashiba , T. et al. Influence of Base Diesel Fuel upon Biodiesel Sludge Formation Tendency SAE Int. J. Fuels Lubr. 2 1 127 138 2009 10.4271/2009-01-0482
- Shell , P. Relationship Between Oil Consumption, Deposit Formation and Piston Ring Motion for Single-Cylinder Diesel Engines SAE Technical Paper 920089 1992 10.4271/920089
- Carroll , D. and Robson , R. Engine Dynamometer Evaluation Of Oil Formulation Factors For Improved Field Sludge Protection SAE Technical Paper 872124 1987 10.4271/872124
- Uehara , T. , Takei , Y. , Hoshi , H. , Shiratani , K. et al. Study on Combustion Chamber Deposit Formation Mechanism - Influence of Fuel Components and Gasoline Detergents SAE Technical Paper 971722 1997 10.4271/971722
- Lastres , L. , de Souza Rocha , J. , De Almeida , M. , and Benvenutti , L. Sludge Formation in OTTO Cycle Engines SAE Technical Paper 2005-01-2173 2005 10.4271/2005-01-2173
- Richards , K. J. , Senecal , P. K. , and Pomraning , E. CONVERGE (Version 2.1.0) Convergent Science, Inc. Middleton, WI 2013
- Gamma Technologies Inc. GT-Suite (Version 7.4.0) Westmont, IL 2013
- CHEMKIN-MFC 7.0, Reaction Design San Diego 2012
- Jia , M. , Xie , M. A chemical kinetics model of iso-octane oxidation for HCCI engines Fuel 85 2006 2593 2604
- Raju , M. , Wang , M. , Senecal , P.K. , Som , S. , and Longman , D.E. A Reduced Diesel Surrogate Mechanism for Compression Ignition Engine Applications Proceedings of the ASME 2012 Internal Combustion Engine Division Fall Technical Conference Vancouver, BC, Canada 2012