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Investigation of Transient Emissions and Mixed Mode Combustion for a Light Duty Diesel Engine
Technical Paper
2009-01-1347
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The use of low temperature combustion (LTC) modes has demonstrated abilities to lower diesel engine emissions while maintaining good fuel consumption. LTC is assumed to be a viable solution to assist in meeting stringent upcoming diesel engine emissions targets, particularly nitric oxides (NOx) and particulate matter (PM). However, LTC is currently limited to low engine loads and is not a feasible solution at higher loads on production engines. A mixed mode combustion strategy must be implemented to take advantage of the benefits offered from LTC at the low loads and speeds while switching to a conventional diesel combustion strategy at higher loads and speeds and thus allowing full range use of the engine under realistic driving conditions.
Experiments were performed to characterize engine out emissions during transient engine operating conditions involving LTC combustion strategies. Mixed mode transitions between conventional diesel combustion and LTC, or more specifically early premixed charge compression ignition (PCCI) combustion were studied along with non-mode switching load transients within early PCCI combustion mode. The studies were carried out on a 4 cylinder 1.9L EURO 4 emissions certified production diesel engine equipped with common rail direct injection (CRDI), a variable geometry turbocharger and cooled exhaust gas recirculation (EGR).
Results of this study show the effect of load transients on the engine out emissions of NOx and unburned hydrocarbons (UHC) and the effects of fuel command change rate in transients while operating within early PCCI combustion. Emissions from combustion mode switching while operating in a mixed mode strategy are shown to depend on the instantaneous air charge preconditioning at the mode switch location. The resulting NOx and UHC are characterized in terms of critical combustion time constants resulting from the fuel and air delivery systems. It is shown that the charging system is the time critical system that limits the rate of the transitions and leads to higher rates of emissions
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Authors
- Jonathan L. Burton - Engine Research Center, University of Wisconsin-Madison
- D. Ryan Williams - Engine Research Center, University of Wisconsin-Madison
- William J. Glewen - Engine Research Center, University of Wisconsin-Madison
- Michael J. Andrie - Engine Research Center, University of Wisconsin-Madison
- Roger B. Krieger - Engine Research Center, University of Wisconsin-Madison
- David E. Foster - Engine Research Center, University of Wisconsin-Madison
Topic
Citation
Burton, J., Williams, D., Glewen, W., Andrie, M. et al., "Investigation of Transient Emissions and Mixed Mode Combustion for a Light Duty Diesel Engine," SAE Technical Paper 2009-01-1347, 2009, https://doi.org/10.4271/2009-01-1347.Also In
References
- Iwabuchi Yoshinori Kawai Kenji Shoji Takeshi Takeda Yoshinaka “Trial of New Concept Diesel Combustion System - Premixed Compression-Ignition Combustion,” SAE paper 1999-01-0185
- http://www.dieselnet.com/standards/ December 15 2008
- Neely G.D. Sasaki S. Huang Y. Leet J.A. Stewart D.W. “New Diesel Emission Control Strategy to Meet US Tier 2 Emissions Regulations” SAE Paper 2005-01-1091 2005
- Kimura S. Aoki O. Kitahara Y. Aiyoshizawa E. “Ultra-Clean Combustion Technology Combining a Low-Temperature and Premixed Combustion Concept for Meeting Future Emission Standards” SAE paper 2001-01-0200
- Black J Eastwood PG Tufail K Winstanley T Hardalupas Y Taylor A M K P “Inter-correlations between smoke opacity, Legal Particulate Sampling (LPS) and TEOM, during transient operation of a diesel engine” SAE paper 2007-01-2060
- Hagena Jonathan R. Filipi Zoran S. Assanis Dennis N. “Transient Diesel Emissions: Analysis of Engine Operation During a Tipin” SAE paper 2006-01-1151
- Busch S Bohac S V Assanis D N “A Study of the Transition Between Lean Conventional and Lean, Premixed, Low Temperature Diesel Combustion” ASME Internal Combustion Engine ICEF 2007-1701
- Longstreth J.C. Sanders F.A. Seaney S.P. Moskwa J.J. Fronczak F.J. design and Construction of a High Bandwidth Hydrostatic Dynamometer” SAE paper 930259
- http://www.cambustion.com/instruments/index.html September 20 2008
- Opat R Ra Y Gonzalez M A Krieger D R Reitz R D Foster D E Durrett R P Siewert R M. “Investigation of Mixing and Temperature Effects, for Highly Dilute Low Temperature Combustion in a Light Duty Diesel Engine,” SAE paper 2007-01-0193