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A CFD Study to Optimize the Injection Strategy for Diesel Particulate Filter Regeneration
Technical Paper
2007-01-0164
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Diesel engines have been progressing a lot during recent years. Beside the driving pleasure due to high torque and the low fuel consumption, it is more and more important to reduce combustion noise and pollutant emissions such as smoke and NOx.
The exhaust after-treatment systems, in particular Diesel Particulate Filter (DPF), have therefore become as a standard for Euro5 applications and for some of the heaviest vehicles for Euro4.
The DPF requires periodic regenerations under high temperature conditions in order to burn out the soot cumulated inside. One of the simplest strategies consists of one or several late injections. Typically, retarding the main and adding an early post injection generate high exhaust temperature while a very late one with a suitable quantity provides hydrocarbons, which burn inside the Diesel Oxidation Catalyst (DOC), and ensures the required temperature upstream the DPF.
Unfortunately, as the late injection occurs in unfavorable thermodynamic conditions, the fuel spray impinges on the cylinder liner wall even with small injected quantities and leads to the contamination of the lub oil.
A CFD study using STARCD with ECFM-3Z combustion model showed the importance of the interaction between consecutive injections and allowed to understand the dilution - regeneration trade-off.
For instance, it is shown that the very late injection sprays can penetrate in the hot burnt gases due to the combustion of the previous injection. It allows to reduce the fuel impingement on the cylinder wall. However, this phenomenon has to be optimized in order to obtain just the vaporization of the lately injected fuel but without its combustion and to keep enough hydrocarbons for the DOC.
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Belloir, M., Sakushima, N., and Lahjaily, H., "A CFD Study to Optimize the Injection Strategy for Diesel Particulate Filter Regeneration," SAE Technical Paper 2007-01-0164, 2007, https://doi.org/10.4271/2007-01-0164.Also In
References
- Bouchez M. Dementhon J. B. Strategies for the Control of Particulate Trap Regeneration SAE paper 2000-01-0472
- Singh P. Thalagavara A. M. Naber J. D. Johnson J. H. Bagley S. T. An Experimental Study of Active Regeneration of an Advanced Catalyzed Particulate Filter by Diesel Fuel Injection Upstream of an Oxidation Catalyst SAE paper 2006-01-0879
- Sarento G. N. White A. D Kotrba A. J. Yetkin A. Engine Tests of an Active Diesel Particulate Regeneration System SAE paper 2006-01-1089
- Zheng M. Reader G. T. Wang D. Zuo J. Kumar R. Mulenga M. C. Asad U. Ting D. S-K. Wang M. A Thermal Response Analysis on the Transient Performance of Active Diesel Aftertreatment SAE paper 2005-01-3885
- Doumeki R. Kodam K. Hiranuma S. Takeda Y. Iwata T. Development of DPF System for commercial Vehicles-Pre-catalyst Supporting to Active Regeneration SAE paper 2006-01-1529
- LEE Jin-Ha KWON Choong-Il KIM Seok-Jea YEO Gwon-Koo Control of Diesel Catalysed Particulate Filter System I (The CPF System Influence Assessment According to a Regeneration Condition) SAE paper 2005-01-0661
- Habchi C. Verhoeven D. Huynh Huu C. Lambert L. Vanhemelryck J. L. Baritaud T. Modeling atomization and break-up in high pressure Diesel sprays SAE paper 970881
- Reitz R. D. Modeling atomization processes in High-Pressure Vaporizing Sprays Atomization and Sprays 3 309 337 1987
- Pilch M. Erdman C. A. Use of Break-up Time Data and Velocity History Data to Predict the Maximum Size of Stable Fragments for acceleration-Induced Break-up of a Liquid Drop Int. J. Multiphase Flow 13 6 741 757 1987
- Colin O. Benkenida A. The 3-Zones Extended Coherent Flame Model (ECFM3Z) for computing Premixed/Diffusion Combustion Oil & Gas Science and Technology - Rev. IFP 59 o 6 593 609 2004
- Giovannini A. Lisbona M. G. Rosso D. CFD Analysis of Injection Strategies for the Regeneration of Diesel Particulate Filter 2006 May 31 June 1
- Hotta Y. Inayoshi M. Nakakita K. Fujiwara K. Sakata I. Achieving Lower Exhaust and Better Performance in an HSDI Diesel Engine with Multiple Injection SAE paper 2005-01-0928
- Krüger M. Wiartalla A. Scholz V. Adomeit P. Rohs H. Diesel Engine Regeneration Mode and Engine Long Term Effects th 2004