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Exhaust gas recirculation system for simultaneously reducing NO.sub.x and particulate matter

  • US 5,806,308 A
  • Filed: 07/07/1997
  • Issued: 09/15/1998
  • Est. Priority Date: 07/07/1997
  • Status: Expired due to Term
First Claim
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1. An exhaust gas recirculation system for an internal combustion engine having an intake manifold and an exhaust manifold, said exhaust gas recirculation system comprising:

  • an exhaust system comprising a particulate trap having a first end in fluid communication with said exhaust manifold of the engine, a second end spaced from said first end, and a back pressure valve having a first end in fluid communication with the second end of said particulate trap;

    an exhaust gas recirculation passageway having an inlet end interposed between the second end of said particulate trap and the first end of said back pressure valve, and an outlet end in fluid communication with the intake manifold of said engine.

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