Dedicated EGR Vehicle Demonstration

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),...

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Bibliographic Details
Published in:SAE International Journal of Engines 2017-06, Vol.10 (3), p.898-907, Article 2017-01-0648
Main Authors: Robertson, Dennis, Chadwell, Christopher, Alger, Terrence, Zuehl, Jacob, Gukelberger, Raphael, Denton, Bradley, Smith, Ian
Format: Article
Language:English
Subjects:
Air pollution control
Combustion
Combustion stability
Cylinders
Fuel consumption
Fuel economy
Knock
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Summary: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).
ISSN:1946-3936
1946-3944
1946-3944
DOI:10.4271/2017-01-0648