SYSTEM AND METHOD OF DEFULFURIZING LEAN NOx TRAP
US-2015143799-A1 · May 28, 2015 · US
Method for controlling exhaust gas purification system
US9856773B1 · US · B1
| Field | Value |
|---|---|
| Publication number | US-9856773-B1 |
| Application number | US-201615359942-A |
| Country | US |
| Kind code | B1 |
| Filing date | Nov 23, 2016 |
| Priority date | Aug 17, 2016 |
| Publication date | Jan 2, 2018 |
| Grant date | Jan 2, 2018 |
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Abstract
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A method for controlling an exhaust gas purification system that can effectively implement desulfation of a selective catalytic reduction (SCR) device. The method for controlling an exhaust gas purification system, in which a diesel particulate filter (DPF) and an SCR device are combined, may include calculating a sulfur poisoning amount of the SCR device and an amount of soot loading in the DPF; and increasing a temperature of the SCR device to a desulfation temperature when the sulfur poisoning amount is greater than a first predetermined value and the amount of soot loading is less than a second predetermined value.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for controlling an exhaust gas purification system in which a diesel particulate filter (DPF) and a selective catalytic reduction (SCR) device are combined, the method comprising: calculating a sulfur poisoning amount of the SCR device and an amount of soot loading in the DPF; and increasing a temperature of the SCR device to a desulfation temperature when the sulfur poisoning amount is greater than a first predetermined value and the amount of soot loading is less than a second predetermined value. 2. The method according to claim 1 , wherein the first predetermined value is a threshold of the sulfur poisoning amount at which purification performance of the SCR device is degraded. 3. The method according to claim 1 , wherein the second predetermined value is a threshold of the amount of soot loading at which damage of the DPF occurs. 4. The method according to claim 1 , further comprising regenerating the DPF when the sulfur poisoning amount is less than the first predetermined value and the amount of soot loading is greater than a third predetermined value. 5. The method according to claim 4 , wherein the third predetermined value is a threshold of the amount of soot loading at which the regenerating of the DPF is required. 6. The method according to claim 1 , wherein the sulfur poisoning amount is determined on a basis of an amount of fuel consumption determined during operating time of an engine and the temperature of the SCR device. 7. The method according to claim 1 , wherein the increasing of the temperature includes increasing the temperature of the SCR device to a temperature for desulfation by post injection of an engine.
Assignees
Inventors
Classifications
Controlling the catalytic process · CPC title
Heat treatment · CPC title
for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas · CPC title
- F01N9/002Primary
of filter regeneration · CPC title
with catalytic reactors · CPC title
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- What does patent US9856773B1 cover?
- A method for controlling an exhaust gas purification system that can effectively implement desulfation of a selective catalytic reduction (SCR) device. The method for controlling an exhaust gas purification system, in which a diesel particulate filter (DPF) and an SCR device are combined, may include calculating a sulfur poisoning amount of the SCR device and an amount of soot loading in the DP…
- Who is the assignee on this patent?
- Hyundai Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F01N9/002. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jan 02 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).