Method for operating a three-way catalyst of an internal combustion engine
AssigneeRobert Bosch GmbH
InventorsEberhard Schnaibel, Andreas Koring, Holger Bellmann, Thomas Wahl, Andreas Blumenstock, Klaus Winkler, Frank Stanglmeier, Bernd Schumann
Life of this patent
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Abstract
An internal combustion engine (1), especially for a motor vehicle, is described, which has a three-way catalytic converter (12″) and a storage catalytic converter (12′) which can be loaded with and unloaded of nitrogen oxides. A diagnosis of the storage catalytic converter (12′) is carried out by a control apparatus (18) below a temperature at which the three-way catalytic converter (12″) does not yet operate.
Claims6
A control apparatus for an internal combustion engine including an internal combustion engine of a motor vehicle, the engine having a three-way catalytic converter and a storage catalytic converter which can be loaded with and unloaded of nitrogen oxides, the control apparatus comprising means for carrying out a diagnosis of the storage catalytic converter below a temperature at which the three-way catalytic converter does not yet operate.
An internal combustion engine including an internal combustion engine for a motor vehicle, the internal combustion engine comprising:
- a three-way catalytic converter and a storage catalytic converter, which can be loaded with and unloaded of nitrogen oxides;
- and,
- a control apparatus including means for carrying out a diagnosis of the storage catalytic converter below a temperature at which the three-way catalytic converter does not yet operate.
A method for operating a storage catalytic converter of an internal combustion engine including an internal combustion engine of a motor vehicle, the method comprising the steps of:
- coupling the storage catalytic converter to a three-way catalytic converter;
- loading the storage catalytic converter with nitrogen oxides and unloading the storage catalytic converter of nitrogen oxides;
- and,
- carrying out a diagnosis of the storage catalytic converter below a temperature at which the three-way catalytic converter does not yet operate.
A control element including a flash memory for a control apparatus of an internal combustion engine including an internal combustion engine of a motor vehicle, the control element comprising a program stored thereon which can be run on a computer apparatus including on a microprocessor, and the program being suitable for carrying out a method for operating a storage catalytic converter of an internal combustion engine including an internal combustion engine of a motor vehicle, the method comprising the steps of:
- coupling the storage catalytic converter to a three-way catalytic converter;
- loading the storage catalytic converter with nitrogen oxides and unloading the storage catalytic converter of nitrogen oxides;
- and,
- carrying out a diagnosis of the storage catalytic converter below a temperature at which the three-way catalytic converter does not yet operate.
Dependencies are inferred from the claim text.