This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Fuel Transport across the Piston Ring Pack: Development of a Computationally Efficient Simulation Model
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 06, 2015 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Increased quantities of fuel in the lubricating oil of CI engines pose a major challenge to the automotive industry in terms of controlling the oil aging and the wear caused by dilution. Due to a lack of methods to calculate the oil-fuel-composite transport across the ring pack, predicting the fuel ratio in the oil sump has been an extremely challenging task for engine manufacturers. An accurate and computationally efficient simulation model is critical to predict the quantity of fuel diluted in the oil in the preliminary development stage of automotive engines.
In this work, the complex composite transport across the piston ring pack was reduced to a simple transport model, which was successfully implemented into a multi-body simulation of the ring pack. The calculation domain was partitioned into two parts, the ring grooves and the piston lands. Inside the grooves the oil flow caused by the pumping and squeezing action of the piston rings was calculated using the Reynolds equation. On the piston lands simplified Navier-Stokes equations were used to calculate the oil flow caused by the inertia force and dragging action of the blow-by gases.
This reduced model enables a calculation of the composite transport in a minimum of time and is therefore well suited for DoE. The main oil flow was observed to be driven by the dragging action of the blow-by gases. The computed integral volume of fuel leaking into the oil sump was successfully validated against the measured value of accompanying experiments.
CitationBregar, J., Rienäcker, A., Gohl, M., and Knoll, G., "Fuel Transport across the Piston Ring Pack: Development of a Computationally Efficient Simulation Model," SAE Technical Paper 2015-24-2534, 2015, https://doi.org/10.4271/2015-24-2534.
Data Sets - Support Documents
|Unnamed Dataset 1|
- Shaw , B. , Hoult , D. , and Wong , V. Development of Engine Lubricant Film Thickness Diagnostics Using Fiber Optics and Laser Fluorescence SAE Technical Paper 920651 1992 10.4271/920651
- Richardson , D. and Borman , G. Using Fiber Optics and Laser Fluorescence for Measuring Thin Oil Films with Application to Engines SAE Technical Paper 912388 1991 10.4271/912388
- Inagaki , H. , Saito , A. , Murakami , M. , and Konomi , T. Development of Two-Dimensional Oil Film Thickness Distribution Measuring System SAE Technical Paper 952346 1995 10.4271/952346
- Thirouard , B. and Tian , T. Oil Transport in the Piston Ring Pack (Part I): Identification and Characterization of the Main Oil Transport Routes and Mechanisms SAE Technical Paper 2003-01-1952 2003 10.4271/2003-01-1952
- Thirouard , B. and Tian , T. Oil Transport in the Piston Ring Pack (Part II): Zone Analysis and Macro Oil Transport Model SAE Technical Paper 2003-01-1953 2003 10.4271/2003-01-1953
- McGrogan , S. , Tian , T. Numerical Simulation of Combustion-Driven Oil Transport on the Top Land of an Internal Combustion Engine Piston International Journal of Engine Research 11 4 243 256 2010 10.1243/14680874JER550
- Booker , J. F. , Huebner , K. H. Application of Finite Element Methods to Lubrication An Engineering Approach, Journal of Lubrication Technology, Transaction of ASME 94 313 1972
- Murty , K.G. Note on a Bard-Type Scheme for Solving the Complimentary Problem Opsearch 11 123 130 June 1974
- Peeken , H. , Knoll , G. , Lechtape-Grüter , R. Kolbenringreibung I FVV project final report 502 1992 513 1993
- Knoll , G. , Lechtape-Grüter , R. Kolbenringreibung II FVV project final report 570-1 1994 570-2 1995