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Exhaust-gas aftertreatment device with nitrogen oxide storage catalytic converter, and operating method therefor

  • US 20030056499A1
  • Filed: 06/26/2002
  • Published: 03/27/2003
  • Est. Priority Date: 07/03/2001
  • Status: Active Grant
First Claim
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1. An exhaust-gas aftertreatment device for an internal combustion engine, comprising:

  • a nitrogen oxide storage catalytic converter; and

    an SCR catalytic converter arranged so that exhaust gas that emerges from the nitrogen oxide storage catalytic converter is fed to the SCR catalytic converter when the internal combustion engine is in a desulphating operating mode with a reducing exhaust-gas composition, in order to remove H2S which is formed during the desulphating.

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