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Exhaust treatment system

  • US 7,762,060 B2
  • Filed: 04/28/2006
  • Issued: 07/27/2010
  • Est. Priority Date: 04/28/2006
  • Status: Active Grant
First Claim
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1. An exhaust treatment system for an engine, comprising:

  • a particulate trap configured to remove one or more types of particulate matter from an exhaust flow of an engine;

    a catalyst configured to chemically alter at least one component of the exhaust flow;

    an exhaust conduit configured to direct the exhaust flow from the engine to the particulate trap and the catalyst; and

    a heating system located downstream from the engine and upstream from the catalyst, the heating system being configured to;

    maintain the temperature of the catalyst above a first predetermined temperature;

    and periodically raise the temperature of the particulate trap above a higher, second predetermined temperature to thereby effectuate a regeneration of the particulate trap by oxidizing particulate matter accumulated in the particulate trap.

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