This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Water Recovery from Gasoline Engine Exhaust for Water Injection
Technical Paper
2018-01-0369
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Water injection (WI) can improve gasoline engine performance and efficiency, and on-board water recovery technology could eliminate the need for customers to refill an on-board water reservoir. In this regard, the technical feasibility of exhaust water recovery (EWR) is described in this paper. Water injection testing was conducted at a full load condition (5000 rpm/18.1 bar BMEP) and a high load condition (3000 rpm/14.0 bar BMEP) on a turbocharged gasoline direction injection (GTDI) engine. Water recovery testing was conducted both after the exhaust gas recirculation (EGR) cooler and after the charge air cooler (CAC) at a high load (3000 rpm/14.0 bar BMEP), as well as a part load (2080 rpm/6.8 bar BMEP) condition, at temperatures ca. 10-15 °C below the dew point of the flow stream. Three types of water separation designs were tested: a passive cyclone separator (CS), a passive membrane separator (MEM), and an active separator (AS). Water injection and recovery amount was also simulated on three different drive cycles: FTP, WLTP and US06. The results showed that using water injection at full load reduced fuel enrichment requirements and reduced knock, yielding a 13% fuel economy improvement. Engine testing at high load condition showed that WI had a negligible effect on three-way catalyst (TWC) conversion efficiency under stoichiometric conditions. EWR was shown to be effective both post EGR cooler and post CAC. The CS and AS showed better performance than the MEM separator for water recovery. With the CS, up to ~100% condensate separation efficiency was achieved with very low pressure drop (~1 kPa). All the condensate samples collected with low sulfur fuel showed near neutral pH levels (6.5-8.5). From the appearance of the condensate samples, MEM-collected water had better quality than the CS and AS collected water. Water collected after the CAC showed better quality and lower pH than that collected downstream of the EGR cooler. Water recovered from post-TWC EGR showed better quality and higher pH than that collected from pre-TWC EGR. Water injection and collection simulations on three different drive cycles using GT-Drive showed that more water could be collected than was required for injection on FTP and WLTP drive cycles, while 40~70% of required water for injection could be collected on the US06 cycle.
Recommended Content
Technical Paper | EMISSION CONTROL AT GM |
Technical Paper | A Thermal Response Analysis on the Transient Performance of Active Diesel Aftertreatment |
Technical Paper | Demonstration of Advanced Emission Controls for Nonroad SI Class II Engines |
Authors
Citation
Sun, Y., Fischer, M., Bradford, M., Kotrba, A. et al., "Water Recovery from Gasoline Engine Exhaust for Water Injection," SAE Technical Paper 2018-01-0369, 2018, https://doi.org/10.4271/2018-01-0369.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 |
Also In
References
- EU CO2 Directive US Tier 3 Legislation in DELPHI, Worldwide Emissions Standards, Passenger cars and Light Duty vehicles 20172018
- European RDE-Legislation (EU) 2017/1154 http://eur-lex.Europa.eu/legalcontent/EN/TXT/PDF/?uri=
- Hirose , I. Mazda 2.5L SKYACTIV-G Engine with New Boosting Technology Vienna Motor Colloquium 2016
- Fischer , M. , Kreutziger , P. , Sun , Y. , and Kotrba , A. Clean EGR for Gasoline Engines - Innovative Approach to Efficiency Improvement and Emissions Reduction Simultaneously SAE Technical Paper 2017-01-0693 2017 https://doi.org/10.4271/2017-01-0683
- Eilemann , A. , Wieske , P. , Warth , M. , and Stehlig , J. Charge Air Subcooling-Enabler for Improved Driveability and Fuel Economy Vienna Motor Symposium 2015
- BMW M4 BMW AG Press Release 2016
- Böhm , M. Ansätze zur OnboardWassergewinnung für eine Wassereinspritzung
- Pischinger , R. , Klell , M. , and Sams , T. Thermodynamik der Verbrennungs-kraftmaschine Wien Springer 2002
- Heywood , J.B. Internal Combustion Engine Fundamentals McGraw-Hill Book Company 1988
- Parrish , O. and Putnam , T. Equations for the Determination of Humidity from Dewpoint and Psychometric Data 1977
- 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 10.4271/2017-01-9281
- Francqueville , L. and Michel , J. On the Effects of EGR on Spark-Ignited Gasoline Combustion at High Load SAE Int. J. Engines 7 4 1808 1823 2014 10.4271/2014-01-2628