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Method for operating a nitrogen oxide (nox) storage catalyst

  • US 6,901,745 B2
  • Filed: 07/11/2001
  • Issued: 06/07/2005
  • Est. Priority Date: 07/26/2000
  • Status: Expired due to Fees
First Claim
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1. A method for operating a nitrogen oxide (NOx)-storage catalytic converter of an internal combustion engine including an internal combustion engine of a motor vehicle, the method comprising the steps of:

  • storing nitrogen oxides in said (NOx)-storage catalytic converter during a first operating phase thereof;

    during said first operating phase, determining the amount of nitrogen oxides stored in said (NOx)-storage catalytic converter;

    discharging the stored nitrogen oxides from said (NOx)-storage catalytic converter during a second operating phase thereof;

    during said second operating phase, determining a quantity characterizing the amount of nitrogen oxides discharged from said (NOx)-storage catalytic converter;

    comparing said quantity to the stored amount determined in said first operating phase; and

    , calibrating an exhaust-gas sensor mounted downstream of said (NOx)-storage catalytic converter utilizing said quantity determined in said second operating phase.

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