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Cost and Fuel Economy Driven Aftertreatment Solutions -for Lean GDI-
Technical Paper
2010-01-0363
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
New fuel economy standards intensify the power train development
for more fuel efficient vehicles worldwide. Different approaches
are utilized to improve the fuel efficiency of gasoline engines. Of
all concepts, including downsizing plus turbocharging, stratified
operation of spray-guided gasoline direct injection (GDI) engines
show the greatest fuel savings benefit. A significant challenge for
stratified GDI aftertreatment systems is to develop both catalysts
and systems that can reduce the high amount and cost of precious
metals currently needed to meet performance standards under low
exhaust temperature operating conditions. Furthermore, tighter
emission standards will exceedingly require high conversion rates
for HC, CO and NOx. In this paper the most recently developed
catalyst and systems for lean GDI aftertreatment will be compared
with serial production EURO 5 systems against future legislated
targets. One development focus is on improvement of three-way
catalysts specifically for lean GDI applications needing advanced
light-off behavior with regard to different gas atmospheres (lean,
rich and λ==1).
An overview on the recent development improvements of NOx
storage catalyst systems is given with regard to cost, performance
and durability. New NOx storage catalyst systems show improved
performance in the low temperature region which allows for
enlarging the usable engine-map range of stratified gasoline
injection to the lower speed/load points without additional heating
measures used by calibrators to rapidly heat the exhaust catalysts.
By further optimization of the aftertreatment system with regard to
system integration (catalyst volume, precious metal distribution) a
considerable reduction in precious metal is realized with improved
over-all performance when compared to the current series
applications. An outlook is given for the requirements of the
aftertreatment for lean GDI in the US.
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Citation
Pauly, T., Franoschek, S., Hoyer, R., and Eckhoff, S., "Cost and Fuel Economy Driven Aftertreatment Solutions -for Lean GDI-," SAE Technical Paper 2010-01-0363, 2010, https://doi.org/10.4271/2010-01-0363.Also In
References
- http://www.whitehouse.gov/ the_press_office/President-Obama-Announces-National-Fuel-Efficiency-Policy
- Federal Register 74 186 September 28 2009 Proposed Rules
- Waltner A. Lückert P. Schaupp U. Rau, R. Kemmler Weller 27. Internationales Wiener Motorensymposium 24 43 2006
- Waltner A. Vent G. Kemmler R. Lux C. Altenschmidt F. Bremm S. Eckhoff S. 15. Aachener Kolloquium Fahrzeug und Motorentechnik 2006
- Brinkmeier C. Schön C. Vent G. Philipp S. Eckhoff S. Bremm S. Müller W. 3. Emission Control 18./19. Mai 2006 Dresden 417 429 2006
- Langen P. Melcher T. Missy S. Schwarz C. Schünemann E. 28. Internationales Wiener Motorensymposium 92 108 2007
- Kannenberg D. Kessler F. Steyer H. Schleich M. Knaut A. 16. Aachener Kolloquium Fahrzeug und Motorentechnik 2007
- Schwarz C. Missy S. Steyer H. Durst B. Schünemann E. Kern W. Witt A. MTZ 05 2007 332 341
- Schaupp U. Bertsch D. Winter H. Schaub R. Kretschmer H. Ott H. 18. Aachener Kolloquium Fahrzeug und Motorentechnik 2009 373 349
- Bremm S. Göbel U. Kreuzer T. Müller W. 5. Tagung: Direkteinspritzung im Ottomotor Haus der Technik Fachbuch 53 332 334 2005
- Eckhoff S. Franke T. Philipp S. Müller; W. 6. Tagung: Direkteinspritzung im Ottomotor Haus der Technik 2007