公开(公告)号：US11795855B2

公开(公告)日：2023-10-24

申请号：US17211112

申请日：2021-03-24

申请人： Isao Chinzei ,  Takahiro Nishio ,  Shogo Shirakawa ,  Masahide Miura ,  Hiromasa Suzuki ,  Yuki Kido ,  Minoru Ito ,  Sho Hoshino ,  Shin Nakayama

发明人： Isao Chinzei ,  Takahiro Nishio ,  Shogo Shirakawa ,  Masahide Miura ,  Hiromasa Suzuki ,  Yuki Kido ,  Minoru Ito ,  Sho Hoshino ,  Shin Nakayama

IPC分类号： F01N3/28 ,  B01J23/44 ,  B01J23/46 ,  B01J21/14 ,  B01J35/00 ,  B01J35/02

CPC分类号： F01N3/2803 ,  B01J21/14 ,  B01J23/44 ,  B01J23/464 ,  B01J35/0006 ,  B01J35/023 ,  F01N2370/02 ,  F01N2510/0684

摘要： Provided is an exhaust gas purification catalyst capable of reducing a noble metal amount while maintaining a catalyst performance, which comprises a substrate and at least three catalyst coating layers formed on the substrate, the first and third catalyst coating layers contain Pd as a catalyst metal and are formed in a range of a predetermined length from an upstream end surface in an exhaust gas flow direction, and the second catalyst coating layer contains Rh as a catalyst metal and is formed in a range of a predetermined length from a downstream end surface in the exhaust gas flow direction.

公开(公告)号：US20210301706A1

公开(公告)日：2021-09-30

申请号：US17211112

申请日：2021-03-24

申请人： Isao CHINZEI ,  Takahiro NISHIO ,  Shogo SHIRAKAWA ,  Masahide MIURA ,  Hiromasa SUZUKI ,  Yuki KIDO ,  Minoru ITO ,  Sho HOSHINO ,  Shin NAKAYAMA

发明人： Isao CHINZEI ,  Takahiro NISHIO ,  Shogo SHIRAKAWA ,  Masahide MIURA ,  Hiromasa SUZUKI ,  Yuki KIDO ,  Minoru ITO ,  Sho HOSHINO ,  Shin NAKAYAMA

IPC分类号： F01N3/28 ,  B01J23/44 ,  B01J23/46 ,  B01J21/14 ,  B01J35/00 ,  B01J35/02

摘要： Provided is an exhaust gas purification catalyst capable of reducing a noble metal amount while maintaining a catalyst performance, which comprises a substrate and at least three catalyst coating layers formed on the substrate, the first and third catalyst coating layers contain Pd as a catalyst metal and are formed in a range of a predetermined length from an upstream end surface in an exhaust gas flow direction, and the second catalyst coating layer contains Rh as a catalyst metal and is formed in a range of a predetermined length from a downstream end surface in the exhaust gas flow direction.