A Novel Approach towards Stable and Low Emission Stratified Lean Combustion Employing Two Solenoid Multi-Hole Direct Injectors
Stratified lean combustion has proven to be a promising approach for further increasing the thermal efficiency of gasoline direct injection engines in low load conditions. In this work, a new injection strategy for stratified operation mode is introduced. A side and a central-mounted solenoid multi-hole injector are simultaneously operated in a single-cylinder engine. Thermodynamic investigations show that this concept leads to improved stability, faster combustion, reduced particle number emissions, and lower fuel consumption levels compared to using only one injector. Experiments at an optical engine and three-dimensional computational fluid dynamics (CFD) simulations explain the improvements by a more compact mixture and reduced piston wetting with two injectors. Finally, the application of external EGR in combination with the above concept allows NOx emissions to be effectively kept at a low level while maintaining a stable operation.
- Record URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/19463936
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Supplemental Notes:
- Abstract reprinted with permission of SAE International.
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Authors:
- Peer, Johann
- Stadler, Andreas
- Zimmer, Thomas
- Härtl, Martin
- Wachtmeister, Georg
- Sauerland, Henning
- Publication Date: 2018-4-18
Language
- English
Media Info
- Media Type: Web
- Features: References;
- Pagination: pp 247-261
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Serial:
- SAE International Journal of Engines
- Volume: 11
- Issue Number: 2
- Publisher: SAE International
- ISSN: 1946-3936
- EISSN: 1946-3944
- Serial URL: https://www.sae.org/publications/collections/content/E-JOURNAL-03/
Subject/Index Terms
- TRT Terms: Combustion; Fluid dynamics; Fuel consumption; Fuel injectors; Lean fuel mixtures; Nitrogen oxides
- Subject Areas: Education and Training; Energy; Highways; Vehicles and Equipment;
Filing Info
- Accession Number: 01683438
- Record Type: Publication
- Source Agency: SAE International
- Report/Paper Numbers: 03-11-02-0016
- Files: TRIS, SAE
- Created Date: Oct 16 2018 3:43PM