Method and system for NOx sensor degradation
US-9010087-B1 · Apr 21, 2015 · US
Method and system for reductant injector degradation
US2015128564A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2015128564-A1 |
| Application number | US-201314079440-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 13, 2013 |
| Priority date | Nov 13, 2013 |
| Publication date | May 14, 2015 |
| Grant date | — |
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Abstract
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Various systems and methods for detecting exhaust reductant injector degradation based on an exhaust NO x sensor are disclosed. In one example, degradation of the reductant injector is indicated when an actual NO x sensor output differs from an expected NO x sensor output by more than a threshold amount under engine off conditions.
First claim
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1 . A method for controlling an engine via an electronic controller, comprising: shutting down the engine to rest and not spinning; generating an output from a feedgas exhaust NO x sensor coupled to an exhaust passage upstream of an exhaust reduction catalyst; and indicating degradation of an exhaust reductant injector based on the output of the feedgas exhaust NO x sensor. 2 . The method of claim 1 , wherein indicating degradation of the exhaust reductant injecto…
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Frequently asked questions
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- What does patent US2015128564A1 cover?
- Various systems and methods for detecting exhaust reductant injector degradation based on an exhaust NO x sensor are disclosed. In one example, degradation of the reductant injector is indicated when an actual NO x sensor output differs from an expected NO x sensor output by more than a threshold amount under engine off conditions.
- Who is the assignee on this patent?
- Ford Global Tech Llc
- What technology area does this patent fall under?
- Primary CPC classification F01N3/18. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu May 14 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).