Control system of internal combustion engine
US-2015369156-A1 · Dec 24, 2015 · US
Exhaust gas purifying apparatus for internal combustion engine
US8944037B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8944037-B2 |
| Application number | US-75124110-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 31, 2010 |
| Priority date | Mar 31, 2009 |
| Publication date | Feb 3, 2015 |
| Grant date | Feb 3, 2015 |
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Abstract
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An exhaust gas purifying apparatus for an internal combustion engine includes a lean control unit and a rich control unit. The lean control unit executes lean spike operation, in which an air-fuel ratio is temporarily changed in a lean direction by a lean change width relative to a reference air-fuel ratio. The rich control unit changes the air-fuel ratio in a rich direction by a rich change width relative to the reference air-fuel ratio after the lean control unit executes the lean spike operation such that the air-fuel ratio stays in a predetermined slightly rich region. The rich change width is smaller than the lean change width.
First claim
Opening claim text (preview).
What is claimed is: 1. An exhaust gas purifying apparatus for an internal combustion engine, wherein an exhaust passage of the internal combustion engine is provided with a catalytic converter that includes an oxygen storage medium and a precious metal, wherein the oxygen storage medium stores and releases oxygen in exhaust gas, wherein the precious metal serves as a catalyst composition, the exhaust gas purifying apparatus comprising: lean control means for executing a lean spike…
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Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- F02D41/1441Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US8944037B2 cover?
- An exhaust gas purifying apparatus for an internal combustion engine includes a lean control unit and a rich control unit. The lean control unit executes lean spike operation, in which an air-fuel ratio is temporarily changed in a lean direction by a lean change width relative to a reference air-fuel ratio. The rich control unit changes the air-fuel ratio in a rich direction by a rich change wi…
- Who is the assignee on this patent?
- Yonekawa Yutaka, Nakano Tomoaki, Denso Corp
- What technology area does this patent fall under?
- Primary CPC classification F02D41/1441. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Feb 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).