Exhaust treatment method and apparatus having particulate filters and scr
US-2024159174-A1 · May 16, 2024 · US
Aftertreatment system having two SCR catalysts
US8997461B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8997461-B2 |
| Application number | US-201213626145-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 25, 2012 |
| Priority date | May 21, 2012 |
| Publication date | Apr 7, 2015 |
| Grant date | Apr 7, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A system and method includes an internal combustion engine capable of producing an exhaust stream and an aftertreatment system operationally coupled to the exhaust stream. The aftertreatment system includes an upstream selective reduction catalyst (SCR) component and a downstream SCR component that are positioned in substantially different thermal environments. The upstream and downstream SCR components are sized to fully treat the entire exhaust stream at a low temperature highest NOx conversion condition, and the downstream SCR component is sized to fully treat the entire exhaust stream at a high temperature highest NOx conversion condition.
First claim
Opening claim text (preview).
What is claimed is: 1. A system, comprising: an internal combustion engine capable of producing an exhaust stream; an aftertreatment system operationally coupled to the exhaust stream, the aftertreatment system comprising an upstream selective reduction catalyst (SCR) component and a downstream SCR component, wherein the upstream SCR component is positioned in a substantially different thermal environment than the downstream SCR component when the internal combustion engine is p…
Assignees
Inventors
Classifications
Cross-Sectional Technologies · mapped topic
Mechanical Engineering · mapped topic
Cross-Sectional Technologies · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US8997461B2 cover?
- A system and method includes an internal combustion engine capable of producing an exhaust stream and an aftertreatment system operationally coupled to the exhaust stream. The aftertreatment system includes an upstream selective reduction catalyst (SCR) component and a downstream SCR component that are positioned in substantially different thermal environments. The upstream and downstream SCR c…
- Who is the assignee on this patent?
- Cummins Emission Solutions Inc, Cummins Emission Solutions Inc
- What technology area does this patent fall under?
- Primary CPC classification F01N3/208. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Apr 07 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).