Engine control device
US-2018274462-A1 · Sep 27, 2018 · US
Method and systems for particulate matter control
US11047277B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11047277-B2 |
| Application number | US-201916403384-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 3, 2019 |
| Priority date | May 9, 2018 |
| Publication date | Jun 29, 2021 |
| Grant date | Jun 29, 2021 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
Various methods and systems are provided for controlling emissions. In one example, a controller is configured to respond to a sensed exhaust oxygen concentration by changing a fuel injection timing to maintain particulate matter (PM) within a range, and then adjusting an exhaust gas recirculation (EGR) amount based on NOx sensor output and based on the change in fuel injection timing.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method, comprising: retarding fuel injection timing responsive to an exhaust oxygen concentration of exhaust gas expelled by an engine measured by an exhaust oxygen sensor being below a reference exhaust oxygen concentration, while also increasing an intake oxygen fraction of intake air admitted to the engine. 2. The method of claim 1 , wherein increasing the intake oxygen fraction of intake air admitted to the engine comprises reducing a flow of exhaust gas recirculation (EGR) from the engine to an intake system coupled to the engine. 3. The method of claim 2 , further comprising closing a first EGR valve controlling flow of exhaust gas from the engine to the intake system and opening a second EGR valve controlling flow of exhaust gas from the engine to an exhaust system coupled to the engine to reduce the flow of EGR from the engine to the intake system. 4. The method of claim 1 , wherein increasing the intake oxygen fraction of the intake air comprises increasing the intake oxygen fraction by a first amount based on a second amount that the fuel injection timing is retarded. 5. The method of claim 1 , wherein retarding fuel injection timing comprises retarding fuel injection timing relative to a base injection timing that is based on engine speed and engine power. 6. The method of claim 1 , wherein retarding fuel injection timing comprises retarding fuel injection timing independent of a fuel injection quantity adjustment. 7. The method of claim 1 , wherein the fuel injection timing is not retarded responsive to the exhaust oxygen concentration being above the reference exhaust oxygen concentration. 8. The method of claim 1 , wherein the reference exhaust oxygen concentration is based on engine power.
Assignees
Inventors
Classifications
Improving ICE efficiencies · CPC title
with sensor output signal being linear or quasi-linear with the concentration of oxygen · CPC title
relating to the failure of actuators or electrically driven elements · CPC title
Using a plurality of comparators · CPC title
Engine management systems · CPC title
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Frequently asked questions
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- What does patent US11047277B2 cover?
- Various methods and systems are provided for controlling emissions. In one example, a controller is configured to respond to a sensed exhaust oxygen concentration by changing a fuel injection timing to maintain particulate matter (PM) within a range, and then adjusting an exhaust gas recirculation (EGR) amount based on NOx sensor output and based on the change in fuel injection timing.
- Who is the assignee on this patent?
- Transp Ip Holdings Llp, Transp Ip Holdings Llc
- What technology area does this patent fall under?
- Primary CPC classification F02D41/1461. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jun 29 2021 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).