Exhaust Gas Purification System for an Internal Combustion Engine
AssigneeDaimler AG
InventorMichael-Rainer Busch
Life of this patent
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Abstract
An exhaust gas purification system for an internal combustion engine of a motor vehicle is provided. The system includes a first particulate filter element and a second particulate filter element, which is connected downstream of the first particulate filter element and through which flows the exhaust gas that emanates from the first particulate filter element. The first particulate filter element operates as a system filter and the second particulate filter element operates as a diagnostic filter. A charge of the diagnostic filter can be determined, and the functional capability of the system filter can be deduced based thereon.
Claims8
1-6. (canceled)
An exhaust gas purification system for an internal combustion engine of a motor vehicle, comprising:
- a first particulate filter element;
- a second particulate filter element connected downstream of the first particulate filter element and through which flows exhaust gas emanating from the first particulate filter element;
- a charge sensor that provides a magnitude correlating with a particle charge of the second particulate filter element;
- and
- an evaluation unit that evaluates the magnitudes provided by the charge sensor in relation to a deposit effect of the first particulate filter element.
A method for an exhaust gas purification system for an internal combustion engine of a motor vehicle, the system including a first particulate filter element and a second particulate filter element connected downstream of the first particulate filter element and through which flows exhaust gas emanating from the first particulate filter element, the method comprising:
- determining, by a charge sensor, a magnitude correlating with a particle charge of the second particulate filter element;
- and
- evaluating, by an evaluation unit, the magnitudes provided by the charge sensor in relation to a deposit effect of the first particulate filter element.
Dependencies are inferred from the claim text.