Method and device for determining the sulphur content in an exhaust gas channel of a motor vehicle in relation to the supplied fuel
AssigneeVitesco Technologies GmbH
InventorHong Zhang
Life of this patent
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Abstract
Various embodiments of the teachings herein include methods for determining the sulfur content in an exhaust tract of a motor vehicle. The method may include: determining a change in the nitrogen oxide abatement efficiency of a coated particulate filter arranged in the exhaust tract and/or a determined ammonia storage capacity change of a coated particulate filter arranged in the exhaust tract; comparing the determined change to a threshold value; identifying an excessive sulfur content if the comparison shows that the determined change exceeds the threshold value; and undertaking one or more corrective actions in response to identifying an excessive sulfur content.
Claims12
A method for operating a motor vehicle, the method comprising:
- monitoring a parameter of an exhaust from an engine of the motor vehicle, wherein the parameter comprises either a nitrogen oxide abatement efficiency of a coated particulate filter arranged in the exhaust tract or an ammonia storage capacity change of a coated particulate filter arranged in an exhaust tract of the motor vehicle;
- comparing a detected change in the parameter to a threshold value;
- identifying an excessive sulfur content if the comparison shows that the detected change exceeds the threshold value;
- and
- undertaking one or more corrective actions in response to identifying an excessive sulfur content.
A control unit for a motor vehicle, the control unit programmed to:
- monitor a parameter of an exhaust from an engine of the motor vehicle, wherein the parameter comprises either a nitrogen oxide abatement efficiency and/or an ammonia storage capacity change of a coated particulate filter arranged in the exhaust tract;
- compare a detected change in the parameter to a threshold value;
- identify an excessive sulfur content if the comparison shows that the detected change exceeds the threshold value;
- and
- undertake one or more corrective actions in response to identifying an excessive sulfur content.
Dependencies are inferred from the claim text.