Method for operating an exhaust gas after-treatment system for an internal combustion engine
AssigneeRobert Bosch GmbH
InventorMarkus Gloeckle
Life of this patent
Estimating the term…
Abstract
In a method for operating an exhaust gas after-treatment system for an internal combustion engine, the exhaust gas after-treatment system comprises at least one apparatus for generating a plasma and at least one SCR catalyst. The exhaust gas after-treatment system further comprises a device for metering a reactant for the SCR catalyst. According to the invention, the nitrogen oxides resulting from the operation of the apparatus for generating a plasma are taken into account in the method when metering the reactant for the SCR catalyst.
Claims11
A method for operating an exhaust gas after-treatment system for an internal combustion engine, the method comprising:
- generating a plasma with a component of the exhaust gas after-treatment system;
- metering a reactant for an SCR catalyst based on nitrogen oxides created as a result of generating a plasma with the component of the exhaust gas after treatment system,
- wherein the nitrogen oxides created as a result of generating a plasma with a component of the exhaust gas after-treatment system are determined on the basis of an operating point of the component of the exhaust gas after-treatment system.
A method for operating an exhaust gas after-treatment system for an internal combustion engine, the method comprising:
- generating a plasma with a component of the exhaust gas after-treatment system;
- metering a reactant for an SCR catalyst based on nitrogen oxides created as a result of generating a plasma with the component of the exhaust gas after treatment system,
- wherein the nitrogen oxides created as a result of generating a plasma with component of the exhaust gas after-treatment system are determined on the basis of a characteristic model for the component of the exhaust gas after-treatment system.
A method for operating an exhaust gas after-treatment system for an internal combustion engine, the method comprising:
- generating a plasma with a component of the exhaust gas after-treatment system;
- metering a reactant for an SCR catalyst based on nitrogen oxides created as a result of generating a plasma with the component of the exhaust gas after treatment system,
- wherein the nitrogen oxides created as a result of generating a plasma with the component of the exhaust gas after-treatment system are taken into account as an additive contribution or as a correction factor during metering the reactant for the SCR catalyst.
A method for operating an exhaust gas after-treatment system for an internal combustion engine, the method comprising:
- generating a plasma with a component of the exhaust gas after-treatment system;
- metering a reactant for an SCR catalyst based on nitrogen oxides created as a result of generating a plasma with the component of the exhaust gas after treatment system,
- wherein the nitrogen oxides created as a result of generating a plasma with the component of the exhaust gas after-treatment system are taken into account as a correction for a value which represents the untreated nitrogen oxide emissions of the internal combustion engine.
A computer configured to control
- generating a plasma with a component of the exhaust gas after-treatment system;
- and
- metering a reactant for an SCR catalyst based on nitrogen oxides created as a result of generating a plasma with the component of the exhaust gas after treatment system.
A machine-readable storage medium containing computer-readable instructions that when executed by a computer cause the computer to control
- generating a plasma with a component of the exhaust gas after-treatment system;
- and
- metering a reactant for an SCR catalyst based on nitrogen oxides created as a result of generating a plasma with the component of the exhaust gas after treatment system.
Dependencies are inferred from the claim text.