Method and system for gasoline particulate filter operations
US-2018017012-A1 · Jan 18, 2018 · US
Gasoline particulate filters with high initial filtering efficiency and methods of making same
US10774708B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10774708-B2 |
| Application number | US-201816121236-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 4, 2018 |
| Priority date | Sep 4, 2018 |
| Publication date | Sep 15, 2020 |
| Grant date | Sep 15, 2020 |
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Abstract
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Gasoline Direct Injection (GDI) engines require gasoline particulate filters (GPFs) as a key component of the emissions control system to reduce particulate emissions. GPFs are known to have poor initial performance, with performance increasing after the filter develops a cake. This poor initial performance make it impossible to accurately assess vehicle emissions performance at the mileage requirements for vehicle certification. Compositions and methods are disclosed to improve filtration efficiency in a fresh or low mileage GPF.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of increasing an initial in-service filtration efficiency of a gasoline particulate filter used with a gasoline direct injection engine, the method comprising: contacting a newly installed gasoline particulate filter with an exhaust stream comprising particulate matter derived from combusting gasoline including a priming composition in a direct injection engine, wherein the priming composition comprises at least one compound containing a chemical element selected from the group consisting of Mg, Mo, Ti, W, Na, and K; and wherein the priming composition produces combustion products including soot and ash that is accumulated on the gasoline particulate filter to achieve cake filtration with 0.5 g/L to 6 g/L of the soot and ash on the gasoline particulate filter within an initial 500 miles after installation of the gasoline particulate filter. 2. The method of claim 1 , wherein the priming composition further comprises a fuel. 3. The method of claim 1 , further comprising measuring a filtration efficiency of the gasoline particulate filter contacted with the priming composition, wherein the filtration efficiency is greater than 80% after 100 initial miles. 4. The method of claim 1 , further comprising: treating a fuel tank with the priming composition during original equipment manufacturing, and adding a fuel to the fuel tank.
Assignees
Inventors
Classifications
Group 7 · CPC title
- F01N3/022Primary
characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous · CPC title
Porosity of filtering material · CPC title
for treatment of exhaust gases from IC Engines · CPC title
in relation with the state of the exhaust gas treating apparatus (control of exhaust gas treating apparatus per se F01N) · CPC title
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- What does patent US10774708B2 cover?
- Gasoline Direct Injection (GDI) engines require gasoline particulate filters (GPFs) as a key component of the emissions control system to reduce particulate emissions. GPFs are known to have poor initial performance, with performance increasing after the filter develops a cake. This poor initial performance make it impossible to accurately assess vehicle emissions performance at the mileage req…
- Who is the assignee on this patent?
- Afton Chemical Corp
- What technology area does this patent fall under?
- Primary CPC classification F01N3/022. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Sep 15 2020 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).