This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Prediction of Oil Dilution by Post-injection in DPF Regeneration Mode
Technical Paper
2019-01-2354
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
This work investigated the mechanism of oil dilution by post injection to remove accumulated particulate matter on the diesel particulate filter of diesel engines. We developed a model to simulate post injection spray under low ambient gas pressure conditions. The model can predict the quantity of fuel mass adhered on the cylinder wall. The adhered fuel enters oil sump through the piston ring and cause oil dilution. The fuel in diluted oil evaporates during normal engine operations. We focus on the mechanism of fuel evaporation from diluted oil. The effects of engine speed and oil temperature on the evaporation were investigated. The results showed that the fuel evaporation rate increases with increasing engine speed and oil temperature. Furthermore, we developed an empirical model to predict the fuel evaporation rate of diluted oil through regression analysis with measured data. The model was validated using two test engines at three constant speed conditions and two transient cycles. Oil dilution predicted by the model showed good agreements with measured data from gas chromatography. The effects of piston ring specifications on oil dilution were also experimentally investigated to clarify the significance of piston rings in the fuel transport model. The results revealed that there ring specifications have no effect on oil dilution regarding the engine used in this study. The coupling of the evaporation model and the post injection spray model provides a method for estimating oil dilution rate during engine operation with regeneration.
Recommended Content
Authors
Citation
Ito, T., Kitamura, T., Kojima, H., and Kawanabe, H., "Prediction of Oil Dilution by Post-injection in DPF Regeneration Mode," SAE Technical Paper 2019-01-2354, 2019, https://doi.org/10.4271/2019-01-2354.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 | ||
Unnamed Dataset 3 | ||
Unnamed Dataset 4 |
Also In
References
- Bong-Ha Song and Yun-Ho Choi Investigation of variations of lubricating oil diluted by post-injected fuel for the regeneration of CDPF and its effects on engine wear Journal of Mechanical Science and Technology 22 2526 2533 2008
- Mark Wattrus Fuel Property Effects on Oil Dilution in Diesel Engines SAE Int. J. Fuels Lubricants 6 794 806 2013
- Budde , M. et al. Simulation and Optical Analysis of Oil Dilution in Diesel Regeneration Operation SAE paper 2011-01-1844 2011
- M.P.B. Musculus , et al. Entrainment Waves in Diesel Jets SAE Int. J. Engines 2 1 1170 1193 2009
- Kojima , H. and Kawanabe , H. Simplified Model for Diesel Combustion Based on 1-D Spray Development Model Proceedings of JSAE 2016 Annual Congress (Spring) 1686 1691 2016
- Nukiyama , S. and Tanasawa , Y. An Experiment on the Atomization of Liquid, (3 rd Report, On the Distribution of the Size of Droplets) Transactions of the JSME 5 131 135 1939
- Liu , A. , et al. Modeling the Effects of Drop Drag and Breakup on Fuel Sprays SAE Technical Paper 930072 1993
- Amsde , A.A. et al. KIVA-II: A Computer Program for Chemically Reactive Flows with Sprays Los Alamous National Laboratory Report No. LA-11560-Ms 1989
- Kojima , H. et al. LES Analysis of Mixture Formation and Combustion Processes in a Diesel Spray SAE Int. J. Engines 5 2 102 111 2011
- Shibata , G. , et al. Impingement and Adhesion on Cylinder Liners with Post Diesel Fuel Injections SAE Technical Paper 2016-01-2193 2016