Asymmetric honeycomb wall-flow filter having improved structural strength
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-046/00
F01N-003/022
출원번호
UP-0089642
(2005-03-24)
등록번호
US-7601194
(2009-10-28)
발명자
/ 주소
Beall, Douglas M.
Frost, Rodney I.
Miao, Weiguo
출원인 / 주소
Corning Incorporated
대리인 / 주소
McNutt, Matthew B.
인용정보
피인용 횟수 :
17인용 특허 :
20
초록▼
A honeycomb filter includes an array of interconnecting porous walls which define an array of first channels and second channels. The first channels are bordered on their sides by the second channels and have a larger hydraulic diameter than the second channels. The first channels have a square cro
A honeycomb filter includes an array of interconnecting porous walls which define an array of first channels and second channels. The first channels are bordered on their sides by the second channels and have a larger hydraulic diameter than the second channels. The first channels have a square cross-section, with corners of the first channels having a shape, such as a bevel or fillet, such that the thickness, t3, of the porous walls adjoining the corners of the first channels is comparable to the thickness, t4, of the porous walls adjoining edges of the first and second channels. Embodiments having a corner fillet with a radius, Rc, are also disclosed. Embodiments wherein 0.30 t4≦Rc≦1.0 t4 exhibit combinations of low wall pressure drop and low thermal stress.
대표청구항▼
What is claimed is: 1. A honeycomb filter, comprising: an array of interconnecting porous walls which define an array of first channels and second channels, the first channels being bordered on their sides by the second channels and having a larger hydraulic diameter than the second channels, the f
What is claimed is: 1. A honeycomb filter, comprising: an array of interconnecting porous walls which define an array of first channels and second channels, the first channels being bordered on their sides by the second channels and having a larger hydraulic diameter than the second channels, the first channels having a square cross-section, with corners of the first channels having a shape such that the thickness (t3) of the porous walls adjoining corners of the first channels is comparable to the thickness (t4) of the porous walls adjoining edges of the first and the second channels. 2. The honeycomb filter of claim 1, wherein the shape includes a fillet. 3. The honeycomb filter of claim 2, wherein the fillet includes a radius, Rc, wherein Rc≧0.30 t4. 4. The honeycomb filter of claim 3, wherein an I/E ratio, defined as a width dimension of the first channels divided by a width dimension of the second channels, is less than 1.5. 5. The honeycomb filter of claim 3, wherein an I/E ratio, defined as a width dimension of the first channels divided by a width dimension of the second channels, is above 1.5 and wherein Rc≧0.50 t4. 6. The honeycomb filter of claim 2, wherein the fillet includes a radius, Rc, and wherein Rc≦1.0 t4. 7. The honeycomb filter of claim 2, wherein the fillet includes a radius, Rc, and wherein 0.50 T4≦Rc≦1.0 t4. 8. The honeycomb filter of claim 2, wherein the fillet includes a radius, Rc, and wherein 0.30 t4≦Rc≦1.0 t4. 9. The honeycomb filter of claim 1, wherein the thickness (t3) of the porous walls adjoining the corners is in a range of about 0.8 to 1.2 times the thickness (t4) of the porous walls adjoining edges of the first and the second channels. 10. The honeycomb filter of claim 1, wherein an I/E ratio, defined as a width dimension of the first channels divided by a width dimension of the second channels, is between 1.1 to 1.5. 11. The honeycomb filter of claim 10, wherein the I/E ratio is between 1.2 to 1.4. 12. The honeycomb filter of claim 1, wherein edges of diagonally-adjacent first channels are substantially aligned. 13. The honeycomb filter of claim 1, wherein the second channels have a square cross-section. 14. The honeycomb filter of claim 1, wherein a ratio of the hydraulic diameter of the first channels to the hydraulic diameter of the second channels is in a range from 1.1 to 2.0. 15. The honeycomb filter of claim 1, wherein the first channels are end-plugged at a first end of the honeycomb filter and the second channels are end-plugged at a second end of the honeycomb filter so that flow into the first channels pass through the porous walls and then out of the honeycomb filter through the second channels. 16. A honeycomb filter, comprising: an array of interconnecting porous walls defining an array of first channels and second channels, the first channels being bordered on their sides by the second channels and having a larger hydraulic diameter than the second channels wherein a ratio of the hydraulic diameter of the first channels to the hydraulic diameter of the second channels is between 1.1 to 1.5, the first channels have a square cross-section, with corners having a fillet with a corner radius, Rc, such that a thickness (t3) of the porous walls adjoining corners of the first channels is in a range of about 0.8 to 1.2 times the thickness (t4) of the porous walls adjoining edges of the first and the second channels and wherein 0.30 t4≦Rc≦1.0 t4.
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이 특허에 인용된 특허 (20)
Frost,Rodney I., Asymmetric honeycomb wall-flow filter having improved structural strength.
Cocchetto Joseph F. (Painted Post NY) Kragle Harry A. (Corning NY) Stumpff Floyd E. (Elmira NY), Method and apparatus for forming a uniform skin on a cellular substrate.
Dettling Joseph C. (Jackson NJ) Mooney John J. (Wyckoff NJ) Skomoroski Robert M. (Paterson NJ) Hindin Saul G. (Mendham NJ), Monolithic catalyst member and support therefor.
Brew, Thomas William; Foster, Jeffrey O; Kremer, Steven John; Miller, Bryan Michael, Honeycomb ceramic substrates, honeycomb extrusion dies, and methods of making honeycomb ceramic substrates.
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