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公开(公告)号：US20220226763A1
公开(公告)日：2022-07-21
申请号：US17577394
申请日：2022-01-18
发明人： Chiaki SEKI , Masanori HASHIMOTO , Naohiro SATO , Tomoko TSUYAMA , Michiya YANO , Yoshiaki HATAKEYAMA
摘要： An exhaust emission control filter is provided that can reduce the pressure loss and has a high exhaust conversion performance and particulate matter capturing performance. An exhaust emission control filter includes: a filter base material having a wall flow structure; and an exhaust conversion catalyst carried on partitions of the filter base material. The median gas pore diameter (D50) of the filter base material after the exhaust conversion catalyst is carried on the filter base material is 17 μm or more. The half width of the gas pore distribution of the filter base material ranges from 7 to 15 μm. The exhaust conversion catalyst is ununiformly carried in a high-density layer having a relatively high density of the exhaust conversion catalyst and a low-density layer having a relatively low density of the exhaust conversion catalyst. The maximum gas pore diameter of the high-density layer is 11.7 μm or less.
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公开(公告)号：US20190203621A1
公开(公告)日：2019-07-04
申请号：US16172893
申请日：2018-10-29
申请人： Honda Motor Co.,Ltd.
发明人： Chiaki SEKI , Takeshi MORI , Takayuki WATANABE
CPC分类号： F01N3/101 , B01D46/2429 , B01D46/247 , B01D46/2474 , B01D53/885 , B01D53/9445 , B01D2046/2437 , B01D2258/012 , F01N3/0222 , F01N3/035 , F01N3/2828 , F01N2250/02
摘要： Provided is an exhaust purifying filter having high catalyst purification performance and particulate matter capturing performance while reducing pressure loss. A GPF includes a filter substrate in which a plurality of cells extending from an inflow-side end surface to an outflow-side end surface are partitioned and formed by a porous partition wall and an inflow-side cell in which an opening in the outflow-side end surface is sealed and an outflow-side cell in which an opening in the inflow-side end surface is sealed are alternately disposed; and a TWC which is carried on the partition wall, wherein a difference between a total volume of pores having pore diameters within a range of 0.1 μm to 10.7 μm in pore distribution of the GPF and a total volume of pores having pore diameters within a range of 0.1 μm to 10.7 μm in pore distribution of the filter substrate is 0.015 ml/g˜0.06 ml/g.
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公开(公告)号：US20220193649A1
公开(公告)日：2022-06-23
申请号：US17599556
申请日：2020-03-13
发明人： Chiaki SEKI , Yusuke IMAI , Atsushi FURUKAWA , Yuichi MATSUO , Naohiro SATO
IPC分类号： B01J35/04 , B01J21/08 , B01J23/46 , B01J23/10 , B01J35/10 , B01D53/94 , F01N3/035 , B01D46/00 , F01N3/10 , F01N3/022
摘要： Provided is an exhaust purification filter that is able to reduce pressure loss and that has high exhaust purification performance and particulate matter trapping performance. This exhaust purification filter comprises a filter substrate having a wall flow structure, and an exhaust purification catalyst supported on a partition wall of the filter substrate. The volume-based median pore diameter (D50) of the filter substrate is 18 μm or greater, the full width at half maximum of the pore distribution of the filter substrate is 7 μm to 15 μm, and the exhaust purification catalyst is supported in an unevenly distributed manner in a high-density layer in which the density of the exhaust purification catalyst is relatively high and a low-density layer in which the density of the exhaust purification catalyst is relatively low.
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公开(公告)号：US20220170397A1
公开(公告)日：2022-06-02
申请号：US17599540
申请日：2019-03-29
发明人： Chiaki SEKI , Yusuke IMAI , Atsushi FURUKAWA , Yuichi MATSUO , Naohiro SATO
摘要： The present invention provides an exhaust purification filter with which pressure loss can be reduced, the filter having high exhaust purification performance and granular-substance-filtering performance. The exhaust purification filter comprises a filter base material having a wall flow structure, and an exhaust purification catalyst supported on a dividing wall of the filter base material, the exhaust purification filter being such that: a median pore diameter (D50) of the filter base material according to a volumetric basis is 15 μm or greater; and the exhaust purification catalyst is unevenly supported on a high-density layer, in which the density of the exhaust purification catalyst is relatively high, and a low-density layer, in which the density of the exhaust purification catalyst is relatively low.
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