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HD Base Engine Development to Meet Future Emission and Power Density Challenges of a DDI™ Engine
Technical Paper
2007-01-4225
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper describes development challenges for Heavy-Duty (HD) on-highway Diesel Direct Injection (DDI™) engines to meet the extremely advanced US-EPA 2010 (later named US 2010) emission limits while further increasing power density in combination with competitive engine efficiency. It discusses technologies and solutions for lowest engine-out emissions in combination with most competitive fuel consumption values and excellent dynamic behavior. To achieve these challenging targets, base engine hardware requirements are described.
In detail the development of EGR systems, especially the challenges of running high EGR rates over the whole engine speed range also at high load, the dynamic EGR control for transient engine operation to achieve lowest NOx emissions at the smoke limit with excellent load response is discussed. Also the effect of the turbo-machinery on power density and transient engine behavior is shown.
Finally, the combustion system development of the DDI™ as an enabler for lowest engine-out emissions is presented in this paper. This includes basic combustion system parameters like piston bowl shape, injector nozzle characteristics, and swirl development as well as optimized air to fuel excess ratios, cooling requirements for EGR, and charge cooling.
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Dreisbach, R., Graf, G., Kreuzig, G., Theissl, H. et al., "HD Base Engine Development to Meet Future Emission and Power Density Challenges of a DDI™ Engine," SAE Technical Paper 2007-01-4225, 2007, https://doi.org/10.4271/2007-01-4225.Data Sets - Support Documents
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References
- Thumm A. Dr. Edwards S. Dr. Pantow E. Dr. Lutz R. Dreisbach R. Glensvig M. “High Performance Cooling Systems as a Contribution to Meeting Future Emission Standards” 28th International Vienna Engine-symposium 2007 Vienna
- AVL Emission Regulations Report www.avl.com/emrep
- Moser, F.X. Sams, T. Dreisbach, R. “Heavy Duty Diesel Engines to Meet Japanese NLTR” 2003 JSAE Annual Congress Yokohama, Japan
- Moser, F.X. Dreisbach, R. Hülser, H. “Transientbetrieb in verschiedenen Heavy Duty Testzyklen als besondere Herausforderung der Zukunft” AVL Partikelforum 2006 Ludwigsburg, Deutschland
- Moser, F.X. Sams, T. Dreisbach, R. “Lowest Engine-out Emissions as the Key to the Future of the Heavy-Duty Diesel Engine, New Development Results” DEER Conference 2004 San Diego, USA
- Moser, F.X. Sams, T. Dreisbach, R. “Required Engine-out Emissions of Heavy-Duty Diesel Engines for 2010 and Later” Meeting of Bus & Coach Experts 2005 Budapest, Hungary