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Methods and systems for operating an engine

  • US 8,831,858 B2
  • Filed: 05/31/2011
  • Issued: 09/09/2014
  • Est. Priority Date: 07/31/2008
  • Status: Active Grant
First Claim
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1. A method for operating an internal combustion engine, the engine having a plurality of cylinders including one or more donor cylinders and one or more non-donor cylinders, comprising:

  • during an exhaust gas recirculation cooler heating mode;

    operating at least one of the donor cylinders at a cylinder load sufficient to increase an exhaust temperature for regenerating an exhaust gas recirculation cooler; and

    operating at least one of the non-donor cylinders in a low- or no-fuel mode.

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