Flow conditioner and method for optimization
US-9506484-B2 · Nov 29, 2016 · US
Selective catalytic reduction outlet mixing device
US8966965B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8966965-B2 |
| Application number | US-201313861781-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 12, 2013 |
| Priority date | Apr 12, 2013 |
| Publication date | Mar 3, 2015 |
| Grant date | Mar 3, 2015 |
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Abstract
Official abstract text for this publication.
Accurate measurement of exhaust gas compounds is necessary for correct operation of exhaust treatment systems, such as Selective Catalytic Reduction (SCR) units used in diesel engines. However, accurate sensor readings assume an even distribution of compounds in an exhaust stream in order to use a sampled measurement to be extrapolated to the compound concentrations in the full stream. A structure placed in an exhaust passage downstream of an SCR reaction unit causes turbulence in the exhaust gas while developing a minimal backpressure. This turbulence helps create a more uniform distribution of compounds in the exhaust. As a result, an exhaust gas sensor gives more accurate readings even when the sensor is placed in relatively close proximity to an output of the SCR system.
First claim
Opening claim text (preview).
What is claimed is: 1. A device for use in an exhaust conduit coupled downstream of a selective catalytic reduction (SCR) unit, the device comprising: a mounting attachment coupled to the exhaust conduit downstream of the SCR unit; and a mixing structure coupled to the mounting attachment and configured to interfere with exhaust flow in the exhaust conduit, wherein, the SCR unit, the device, and a NOx sensor are consecutively mounted in the downstream flow of exhaust absent any…
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Cross-Sectional Technologies · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- F15D1/025Primary
Mechanical Engineering · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US8966965B2 cover?
- Accurate measurement of exhaust gas compounds is necessary for correct operation of exhaust treatment systems, such as Selective Catalytic Reduction (SCR) units used in diesel engines. However, accurate sensor readings assume an even distribution of compounds in an exhaust stream in order to use a sampled measurement to be extrapolated to the compound concentrations in the full stream. A struct…
- Who is the assignee on this patent?
- Caterpillar Inc
- What technology area does this patent fall under?
- Primary CPC classification F15D1/025. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 03 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).