Exhaust treatment method and apparatus having particulate filters and scr
US-2024159174-A1 · May 16, 2024 · US
Cold start startup unit for urea-based systems
US9028783B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9028783-B2 |
| Application number | US-201214343081-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 8, 2012 |
| Priority date | Sep 6, 2011 |
| Publication date | May 12, 2015 |
| Grant date | May 12, 2015 |
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- Title
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Abstract
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An exhaust after-treatment system is described. Generally speaking, the system includes separate primary and secondary NOx reducing systems for delivering reductant to an exhaust stream, a sensor system for determining relevant operating conditions and an electronic control module for activating the reducing systems. Methods for reducing NOx in an exhaust stream are also described. Generally speaking, the methods include the steps of determining a need for NOx reduction in an exhaust stream, determining exhaust temperature, determining ambient temperature, and injecting at least one of a primary reductant and a secondary reductant into the exhaust stream based on the determined temperature. The system and method are particularly useful during cold start conditions, as well as lightly loaded application in conditions where the ambient temperature is below 45 F where the SCR catalyst may not fully function.
First claim
Opening claim text (preview).
What is claimed is: 1. An exhaust after-treatment system comprising: a primary system having a canister with a pre-determined amount of a first reductant containing material stored therein, the primary system having a primary flow control module; a secondary system having a canister with a pre-determined amount of a second reductant material stored therein, the secondary system having a secondary flow control module; a dosing control system for determining the amount of reduct…
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Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- B01D53/9431Primary
Operations & Transport · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US9028783B2 cover?
- An exhaust after-treatment system is described. Generally speaking, the system includes separate primary and secondary NOx reducing systems for delivering reductant to an exhaust stream, a sensor system for determining relevant operating conditions and an electronic control module for activating the reducing systems. Methods for reducing NOx in an exhaust stream are also described. Generally sp…
- Who is the assignee on this patent?
- Cagney John L, Kashanipour Houman, Int Engine Intellectual Prop
- What technology area does this patent fall under?
- Primary CPC classification B01D53/9431. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue May 12 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).