Exhaust purification apparatus for internal combustion engine
US-2015369153-A1 · Dec 24, 2015 · US
Method and system for initiating an engine after-run state and controlling a nitrogen oxide sensor self-diagnostic tool
US9109480B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9109480-B2 |
| Application number | US-201213688347-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 29, 2012 |
| Priority date | Nov 29, 2012 |
| Publication date | Aug 18, 2015 |
| Grant date | Aug 18, 2015 |
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Abstract
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A system and method for initiating an engine after-run state and controlling a nitrogen oxide sensor self-diagnostic tool are provided. The system may include an internal combustion engine, an exhaust system, a selective catalytic reduction (SCR) device and at least two NOx sensors to measure the efficiency of the SCR device and a controller or host machine. The controller, via the present method, executes a first control action to disable the self-diagnostic tool when one of an occurrence of a particulate filter regeneration event and a non-occurrence of a calibration threshold is detected. The controller executes a second control action, initiating an engine after-run state and enabling the self-diagnostic tool when one of a non-occurrence of a particulate filter regeneration event and an occurrence of the calibration threshold is detected.
First claim
Opening claim text (preview).
The invention claimed is: 1. A vehicle comprising: an internal combustion engine configured to generate an exhaust stream; an exhaust system including: a selective catalytic reduction (SCR) device configured to catalytically convert nitrogen oxide (NOx) gases present in the exhaust stream into water and nitrogen; an upstream NOx sensor having a first evaluation element configured to measure an upstream NOx level on an inlet side of the SCR device; and a downstream NOx senso…
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- F01N9/002Primary
Mechanical Engineering · mapped topic
Cross-Sectional Technologies · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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- What does patent US9109480B2 cover?
- A system and method for initiating an engine after-run state and controlling a nitrogen oxide sensor self-diagnostic tool are provided. The system may include an internal combustion engine, an exhaust system, a selective catalytic reduction (SCR) device and at least two NOx sensors to measure the efficiency of the SCR device and a controller or host machine. The controller, via the present meth…
- Who is the assignee on this patent?
- Gm Global Tech Operations Inc
- What technology area does this patent fall under?
- Primary CPC classification F01N9/002. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Aug 18 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).