Invention Grant
- Patent Title: Particulate filter
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Application No.: US17618082Application Date: 2020-06-26
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Publication No.: US11808188B2Publication Date: 2023-11-07
- Inventor: Ryo Tasaki , Ryota Onoe , Momoko Iwai , Yamato Matsushita
- Applicant: Cataler Corporation
- Applicant Address: JP Kakegawa
- Assignee: Cataler Corporation
- Current Assignee: Cataler Corporation
- Current Assignee Address: JP Kakegawa
- Agency: Occhiuti & Rohlicek LLP
- Priority: JP 19119019 2019.06.26
- International Application: PCT/JP2020/025265 2020.06.26
- International Announcement: WO2020/262623A 2020.12.30
- Date entered country: 2021-12-10
- Main IPC: F01N3/022
- IPC: F01N3/022 ; B01D46/82 ; B01D46/24 ; B01D53/94 ; B01J21/04 ; B01J23/02 ; B01J23/58 ; B01J35/00 ; B01J35/04 ; F01N3/035 ; F01N3/023 ; F01N9/00 ; F01N3/021 ; F01N3/025 ; F01N3/28

Abstract:
A particulate filter disclosed herein includes a wall-flow structure substrate 10 and a wash coat layer 20 held inside a partition 16 of the substrate 10. The wash coat layer 20 includes an inlet layer 22 formed to have predetermined length LA and thickness TA from near an end thereof on an exhaust gas inflow side X1, and an outlet layer 24 formed to have predetermined length LB and thickness TB from near an end thereof on an exhaust gas outflow side X2. The inlet layer 22 and the outlet layer 24 partially overlap each other. In the particulate filter disclosed herein, the inlet layer 22 contains a precious metal catalyst, while the outlet layer 24 contains substantially no precious metal catalyst. The length LA of the inlet layer is 50% or more and 75% or less of a total length L of the partition 16. Thus, the particulate filter is capable of achieving both PM collection performance and pressure-drop reduction performance at high levels.
Public/Granted literature
- US20220316372A1 Particulate Filter Public/Granted day:2022-10-06
Information query
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