This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Simulative Study for Post Oxidation During Scavenging on Turbo Charged SI Engines
Technical Paper
2018-01-0853
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Fulfilling exhaust emissions regulations and meet customer performance needs mainly drive the current engine development. Turbocharging system plays a key role for that. Currently turbocharging should provide highest engine power density at high engine speed by also allowing a very responsive performance at low end. This represents a trade-off in turbocharger development. A large scaled turbine allows having moderate exhaust gas back pressure for peak power region, but leading to loss of torque in low engine speed. In the last years of engine development scavenging helped to get away a bit from this trade-off as it increases the turbine mass flow and also reduces cylinder internal residual gas at low engine speed. The mostly in-use lean strategy runs air fuel ratios of closed to stoichiometric mixture in cylinder and global (pre catalyst) of λ = 1.05 to l = 1.3. This will be out of the narrow air fuel ratio band of λ = 1 to ensure NOx conversion in the 3-way-catalyst. The use of the rich strategy (in cylinder λ < 1, pre catalyst stoichiometric) increases significantly the brake specific fuel consumption and lowers the exhaust gas temperature, which leads to loss of turbine power. Nevertheless as a result of this procedure, fresh air and large amount of unburned fuel enters the catalyst in short sequences. This can lead to high temperature in the catalyst and thus reduces its live cycle.
The present paper aims to show the potential of oxidation of unburned species pre turbine to empower the turbine and also reduce the amount of emissions needed to convert by the catalyst. Within this paper the use of detailed reactions kinetics mechanism of CO and H2 will be shown. Furthermore some 3D CFD calculation results will be presented to show the mixture in the exhaust manifold. To show the maximum potential 1D simulation including a strongly reduces oxidation mechanism has been carried out.
Recommended Content
Authors
Topic
Citation
Guenther, T., Grill, M., and Bargende, M., "A Simulative Study for Post Oxidation During Scavenging on Turbo Charged SI Engines," SAE Technical Paper 2018-01-0853, 2018, https://doi.org/10.4271/2018-01-0853.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 |
Also In
References
- Gulde , D. ; Busse , H. Elf Autos im Abgas-Check; NOx, Feinstaub, CO2 im Real-Fahr-Test https://www.auto-motor-und-sport.de/testbericht/nox-partikel-co2-11-autos-im-real-fahr-test-706486.html 2017
- Heywood J. B. Internal Combustion Engine Fundamentals McGraw-Hill, Inc. USA 1988 978-0070286375
- Schmid , A. ; Grill , M. ; Berner , H. J. ; Bargende , M. MTZ worldwide 10 15 2010
- Atzler , F. Electric Charging to Avoid Scavenging in Future Gasoline Engines Supercharging Conference Dresden 2015
- Middendorf , H. , Krebs , R. , Szengel , R. , Pott , E. et al. Volkswagen introduces the world’s first double charge air direct injection petrol engine Aachen Colloquium Automobile and Engine Technology 2005
- Fleiss , M. , Crabb , D. , Somhorst , J. , Möller , N. et al. VEA - Volvo Engine Architecture: Extreme Downsizing and Maximum Commonality while Maintaining Highly Competitive Customer Attributes Aachen Colloquium Automobile and Engine Technology 2013
- Durrieu , D. ; Decoster , S. ; Wu , Y. ; Criddle , M. ; Webster , M. ; Dufour , M. ; Lefevre , T. ; Blayer , M. ; Benard , M. ; Thomas , V. Electric Supercharger the Best Time to Torque Solution for Future Highly Boosted Gasoline Engine; Supercharging Conference Dresden 2013
- Spinner , G. ; Weiske , S. ; Muenz , S. BorgWarner’s eBOOSTER® - the New Generation of Electric Assisted Boosting Supercharging Conference Dresden 2013
- Koenig , G. ; Maly , R. ; Bradley , D. ; Lau , A. et al. Role of Exothermic Centers on Knock Initiation and Knock Damage SAE Technical Paper 902136 1990 10.4271/902136
- Koehlen , C. ; Holder , E. ; Vent , G. Investigation of Post Oxidation for Optimization of Cat-Light-off with a SULEV-Engine International Symposium on Internal Combustion Diagnostic Baden 2002
- Mendl , G. ; Hoffmann , O. ; Mangold , R. ; Rosenberger , S. ; Pfalzgraf , J. ; Langa , Z. ; Czuczor , B. The New Audi 2.0l g-Tron - Another Step for the Sustainable Mobility of the Future 38 International Vienna Motor Symposium Vienna 2017
- Andriesse , D. ; Comignaghi , E. ; Lucignano , G. ; Oreggioni , A. ; Quinto , S. ; Sacco , D. The New 1.8l DI Turbo-Jet Gasoline Engine from Fiat Powertrain Technologies Aachen Colloquium Automobile and Engine Technology Aachen 2008
- Schmid , A. ; Grill , M. ; Berner , H.-J. ; Bargende , M. Simulation of the Post-Oxidation in Turbo Charged SI-DI-Engines SAE Technical Paper 2011-01-0373 10.4271/2011-01-0373 2011
- Guenther , T. ; Grill , M. ; Kaechele , A. ; Chiodi , M. ; Eder , J. ; Berner , H.-J. ; Bargende , M. Torque Enhancement and Emissions Fulfillment by Using Post Oxidation for Scavenging on Turbo Charged SI Engines Supercharging Conference Dresden 2017
- Smith , G. P. ; Golden , D. M. ; Frenklach , M. ; Eiteener , B. ; Goldenberg , M. ; Bowman , C. T. ; Hanson , R. K. ; Gardiner , W. C. ; Lissianski , V. V. ; Qin , Z. W. http://www.me.berkeley.edu/gri_mech/.Version: 2000
- Grill , M. ; Bargende , M. The Cylinder Module MTZ worldwide 2009 60 66 2009
- Grill , M. ; Bargende , M. The Development of an Highly Modular Designed Zero-Dimensional Engine Process Calculation Code SAE Int. J. Engines 3 1 1 11 10.4271/2010-01-0149 2010
- Grill , M. ; Chiodi , M. ; Berner , H.-J. ; Bargende , M. Calculating the Thermodynamic Properties of Burnt Gas and Vapor Fuel for User-Defined Fuels MTZ worldwide 68 5 2007 30 35 2007
- Grill , M. , Billinger , M. , and Bargende , M. Quasi-Dimensional Modeling of Spark Ignition Engine Combustion with Variable Valve Train SAE-Paper 2006-01-1107 2006 10.4271/2006-01-1107
- Gamma Technologies 2017
- Goodwin , D. G. , Moffat , H. K. , and Speth , R.L. Cantera: An Object-oriented Software Toolkit for Chemical Kinetics, Thermodynamics, and Transport Processes http://www.cantera.org 2015
- Turns , S. R. An Introduction to Combustion: Concepts and Applications 2nd McGraw-Hill Series in Mechanical Engineering 2000 0-07-230096-5
- Gamma Technologies 2017
- Chiodi , M. An Innovative 3D-CFD-Approach towards Virtual Development of Internal Combustion Engines 2011