Dedicated EGR Vehicle Demonstration

Paper #:
  • 2017-01-0648

Published:
  • 2017-03-28
Abstract:
Dedicated EGR (D-EGR) is a novel 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 can be 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 LEV-III limit (30 mg/mile).
Also in:
  • SAE International Journal of Engines - V126-3EJ
  • SAE International Journal of Engines - V126-3
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