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SYSTEM AND METHOD FOR REDUCING NOx EMISSIONS AFTER FUEL CUT-OFF EVENTS

  • US 20060021326A1
  • Filed: 07/27/2004
  • Published: 02/02/2006
  • Est. Priority Date: 07/27/2004
  • Status: Active Grant
First Claim
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1. A method of controlling exhaust emission oxides of nitrogen (NOx) from an internal combustion engine (ICE), the method comprising:

  • determining when an engine speed is below a first predetermined level; and

    controlling an oxygen displacement valve (ODV) such that at least a portion of exhaust gas generated by the ICE is directed into an intake air flow of the ICE.

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