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Dedicated EGR Vehicle Demonstration

Journal Article
2017-01-0648
ISSN: 1946-3936, e-ISSN: 1946-3944
DOI: https://doi.org/10.4271/2017-01-0648
Published March 28, 2017 by SAE International in United States
Dedicated EGR Vehicle Demonstration
Sector:
Citation: Robertson, D., Chadwell, C., Alger, T., Zuehl, J. et al., "Dedicated EGR Vehicle Demonstration," SAE Int. J. Engines 10(3):898-907, 2017, https://doi.org/10.4271/2017-01-0648.
Language: English

Abstract:

Dedicated EGR (D-EGR) is an EGR strategy that uses in-cylinder reformation to improve fuel economy and reduce emissions. The entire exhaust of a sub-group of power cylinders (dedicated cylinders) is routed directly into the intake. These cylinders are run fuel-rich, producing H2 and CO (reformate), with the potential to improve combustion stability, knock tolerance and burn duration.
A 2.0 L turbocharged D-EGR engine was packaged into a 2012 Buick Regal and evaluated on drive cycle performance. City and highway fuel consumption were reduced by 13% and 9%, respectively. NOx + NMOG were 31 mg/mile, well below the Tier 2 Bin 5 limit and just outside the Tier 3 Bin 30 limit (30 mg/mile).

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