This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Transient Simulation of Nitrogen Oxide Emissions of CI Engines
Technical Paper
2016-01-1002
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
This paper presents a quasi-dimensional emission model for calculating the transient nitric oxide emissions of a diesel engine. Using conventional and high-speed measurement technology, steady-state and transient emissions of a V6 diesel engine were examined. Based on measured load steps and steady-state measurements a direct influence of the combustion chamber wall temperature on the nitric oxide emissions was found. Load steps to and from, as well as steady-state measurements down to almost stoichiometric global combustion air ratios were used to examine the behavior of nitric oxide formation under these operating conditions.
An existing emission model was expanded in order to represent the direct influence of the combustion chamber wall temperature on the nitric oxide emissions as well as enabling the forecasting of nitric oxide emissions at low global combustion air ratios: Both particularly important aspects for the simulation of transient emissions. This also improves forecasting at steady-state operating points and enables forecasting for low global combustion air ratios in the first place.
The improved model was validated for both steady-state and transient cases using measurements. In the area of the measured engine characteristics, an enhanced forecasting quality of the improved model was demonstrated for steady-state operating points. The simulated transient load steps delivered significantly better forecasts with the improved model. Overall, the improved model thus enables not only the prediction of nitric oxide emissions in a wider operating range, but rather also delivers more precise forecasts within the complete performance map, as well as in the case of transient operation.
Recommended Content
Authors
Topic
Citation
Kaal, B., Grill, M., and Bargende, M., "Transient Simulation of Nitrogen Oxide Emissions of CI Engines," SAE Technical Paper 2016-01-1002, 2016, https://doi.org/10.4271/2016-01-1002.Also In
References
- Das Statistik-Portal http://de.statista.com/statistik/daten/studie/30846/umfrage/dieselanteil-an-den-pkw-neuzulassungen-in-westeuropa/ Oct. 2014
- Kožuch P. Ein phänomenologisches Modell zur kombinierten Stickoxid- und Rußberechnung bei direkteinspritzenden Dieselmotoren Ph.D. thesis University of Stuttgart 2004
- Hiroyasu H. , Kadota T. and Arai M. Development and Use of a Spray Combustion Modeling to Predict Diesel Engine Efficiency and Pollutant Emissions Bulletin of the JSME 26 214 569 575 April 1983
- Hohlbaum B. Beitrag zur rechnerischen Untersuchung der Stickstoffoxid-Bildung schnelllaufender Hochleistungsdieselmotoren Ph.D. thesis University Fridericiana Karlsruhe 1992
- Heider G. Rechenmodell zur Vorausrechnung der NOEmission von Dieselmotoren Ph.D. thesis Technische Universität München 1996
- Kaal B. and Sosio M. Instationäre Emissionsmodellierung am Dieselmotor 1062 2015 Frankfurt am Main: Forschungsvereinigung Verbrennungskraftmaschinen e.V. 2015
- Heinle M. Ein verbesserter Berechnungsansatz der instationären Wandwärmeverluste in Verbrennungsmotoren Ph.D. thesis University of Stuttgart 2013
- Merker G. P. , Schwarz C. , Stiesch G. and Otto F. Vebrennungsmotoren: Simulation der Verbrennung und Schadstoffbildung Wiesbaden B. G. Teubner 2007
- Eiglmeier C. Phänomenologische Modellbildung des gasseitigen Wandwärmeüberganges in Dieselmotoren Ph.D. thesis University of Hannover 2000
- Hohlbaum B. Beitrag zur rechnerischen Untersuchung der Stickstoffoxid-Bildung schnelllaufender Hochleistungsdieselmotoren Ph.D. thesis University Fridericiana Karlsruhe 1992