This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Comparison of EGR Condensate Composition between EGR and Dedicated-EGR Combustion Strategies
Technical Paper
2021-01-0484
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Event:
SAE WCX Digital Summit
Language:
English
Abstract
Water injection is an effective method for knock control in spark-ignition engines. However, the requirement of a separate water source and the cost and complexity associated with a fully integrated system creates a limitation of this method to be used in volume production engines. The engine exhaust typically contains 10-15% water vapor by volume which could be condensed and potentially stored for future use. In this study, the exhaust condensate composition was assessed for its use as an effective replacement for distilled water. Specifically, condensate samples were collected pre and post-three-way catalyst (TWC) and analyzed for acidity and composition. The composition of the pre and post-TWC condensates was found to be similar however, the pre-TWC condensate was mildly acidic. The mild acidity has the potential to corrode certain components in the intake air circuit.
The study was further extended to include condensate analysis from an engine operating a dedicated-EGR (D-EGR) strategy running on two similar octane number, E0 and E85 fuels. These condensate samples were compared with a baseline and 0% EGR case. The analysis revealed increased concentrations of nitrite, acetate, and ammonium for D-EGR condensate samples compared to the traditional 25% EGR operation for both E0 and E85 fuels. None of the samples obtained exhibited acidic properties based on their pH values in this second part of the study. Ion analysis of the condensates revealed exhibited lower cation and anion concentrations for the E85 fuel compared to the E0 fuel for 25% conventional and D-EGR condensates. Further, the overall cation and anion formation were higher for the 25% rich D-EGR stream compared to the 25% stoichiometric EGR which was counter-intuitive to the pH measurement of the condensate samples.
Authors
Topic
Citation
Kalaskar, V., Conway, G., Gukelberger, R., Randolph, E. et al., "A Comparison of EGR Condensate Composition between EGR and Dedicated-EGR Combustion Strategies," SAE Technical Paper 2021-01-0484, 2021, https://doi.org/10.4271/2021-01-0484.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 | ||
Unnamed Dataset 3 | ||
Unnamed Dataset 4 | ||
Unnamed Dataset 5 | ||
Unnamed Dataset 6 | ||
Unnamed Dataset 7 |
Also In
References
- Kauf , M. , Gern , M. , and Seefeldt , S. Evaluation of Water Injection Strategies for NOx Reduction and Charge Cooling in SI Engines SAE Technical Paper 2019-01-2164 2019 https://doi.org/10.4271/2019-01-2164
- Khatri , J. , Denbratt , I. , Dahlander , P. , and Koopmans , L. Water Injection Benefits in a 3-Cylinder Downsized SI-Engine SAE Technical Paper 2019-01-0034 2019 https://doi.org/10.4271/2019-01-0034
- Vacca , A. , Cupo , F. , Chiodi , M. , Bargende , M. et al. The Virtual Engine Development for Enhancing the Compression Ratio of DISI-Engines Combining Water Injection, Turbulence Increase and Miller Strategy SAE Technical Paper 2020-37-0010 2020 https://doi.org/10.4271/2020-37-0010
- Cordier , M. , Lecompte , M. , Malbec , L.-M. , Reveille , B. et al. Water Injection to Improve Direct Injection Spark Ignition Engine Efficiency SAE Technical Paper 2019-01-1139 2019 https://doi.org/10.4271/2019-01-1139
- Iacobacci , A. , Marchitto , L. , and Valentino , G. Water Injection to Enhance Performance and Emissions of a Turbocharged Gasoline Engine under High Load Condition SAE Int. J. Engines 10 3 2017 https://doi.org/10.4271/2017-01-0660
- BMW M4 2016
- Hébert , G. , Bazala , J. , Fischer , O. , Nothbau , J. , Thewes , M. , and Voßhall , T. Exhaust Gas Condensate as an Enabler for Self-Contained Water Injection Systems 28th Aachen Colloquim, Automobile and Engine Technology 2019
- Kass , M.D. , Thomas , J.F. , Wilson , D. , Lewis , S.A. , and Sarles , A. Assessment of Corrosivity Associated With Exhaust Gas Recirculation in a Heavy-Duty Diesel Engine SAE Technical Paper 2005-01-0657 2005 https://doi.org/10.4271/2005-01-0657
- Garcia , J.J. Exhaust Gas Condensate Corrosion Test on Low Pressure Cooling System of Aluminum Brazed EGR, ACAC and WCAC SAE Technical Paper 2012-01-1947 2012 https://doi.org/10.4271/2012-01-1947
- Roth , D.B. , Gonzalez Tabares , I. , and Sotelo Álvarez , A. Condensing LPL EGR Mixer with Mid-Pressure Loop SAE Int. J. Engines 8 4 2015 https://doi.org/10.4271/2015-01-1257
- Bravo , Y. , Larrosa , C. , Lujan , J. , Climent , H. , and Rivas , M. Evaluation of EGR System Implementation in a GTDI Engine with Different Configurations: Assessment on Fouling and Corrosion Issues SAE Technical Paper 2016-01-1016 2016 https://doi.org/10.4271/2016-01-1016
- Randolph , E. , Bocher , F. , Kroll , S. , Wright , N. et al. Visual, Thermodynamic, and Electrochemical Analysis of Condensate in a Stoichiometric Spark-Ignited EGR Engine SAE Int. J. Engines 11 6 2018 https://doi.org/10.4271/2018-01-1406
- Román , A.S. , Méndez , C.M. , and Ares , A.E. Corrosion Resistance of Stainless Steels in Biodiesel Tiryakiovglu , M. , Jolly , M. , and Byczynski , G. Shape Casting: 6th International Symposium Springer International Publishing Cham 978-3-319-48166-1 109 116 2016 10.1007/978-3-319-48166-1_14
- Kaul , S. , Saxena , R.C. , Kumar , A. , Negi , M.S. et al. Corrosion Behavior of Biodiesel from Seed Oils of Indian Origin on Diesel Engine Parts Fuel Process. Technol 88 3 303 307 2007 10.1016/j.fuproc.2006.10.011
- Robertson , D. , Chadwell , C. , Alger , T. , Zuehl , J. et al. Dedicated EGR Vehicle Demonstration SAE Int. J. Engines 10 3 648 2017 2017 https://doi.org/10.4271/2017-01-0648
- Gukelberger , R. , Gingrich , J. , Alger , T. , and Almaraz , S. LPL EGR and D-EGR® Engine Concept Comparison Part 1: Part Load Operation SAE Int. J. Engines 8 2 547 556 2015 https://doi.org/10.4271/2015-01-0781
- Chadwell , C. , Alger , T. , Zuehl , J. , and Gukelberger , R. A Demonstration of Dedicated EGR on a 2.0 L GDI Engine SAE Int. J. Engines 7 1 434 447 2014 https://doi.org/10.4271/2014-01-1190
- Kalaskar , V.B. , Gukelberger , R. , Denton , B. , and Briggs , T. The Impact of Engine Operating Conditions on Reformate Production in a D-EGR Engine SAE Technical Paper 2017-01-0684 March 2017 https://doi.org/10.4271/2017-01-0684
- Garrido Gonzalez , N. , Baar , R. , Drueckhammer , J. , and Kaeppner , C. The Thermodynamics of Exhaust Gas Condensation SAE Int. J. Engines 10 4 1411 1421 2017 https://doi.org/10.4271/2017-01-9281
- ASTM D7946-19 2019 10.1520/D7946-19