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    EXHAUST GAS PURIFICATION DEVICE
    4.
    发明申请
    EXHAUST GAS PURIFICATION DEVICE 有权

    公开(公告)号：US20220106900A1

    公开(公告)日：2022-04-07

    申请号：US17487236

    申请日：2021-09-28

    申请人： Isao CHINZEI ,  Takumi TOJO ,  Masahide MIURA ,  Nobusuke KABASHIMA ,  Minoru ITO ,  Naoto FUJITA

    发明人： Isao CHINZEI ,  Takumi TOJO ,  Masahide MIURA ,  Nobusuke KABASHIMA ,  Minoru ITO ,  Naoto FUJITA

    IPC分类号： F01N13/00 ,  F01N3/28

    摘要： An exhaust gas purification device includes a substrate including an upstream end and a downstream end, the substrate having a length Ls between the upstream end and the downstream end; a first catalyst layer containing first catalyst particles, extending across a first region, and being in contact with the substrate, the first region extending between the upstream end and a first position, the first position being at a first distance La from the upstream end toward the downstream end; and a second catalyst layer containing second catalyst particles, extending across a second region, and being in contact with the substrate, the second region extending between the downstream end and a second position, the second position being at a second distance Lb from the downstream end toward the upstream end. The first catalyst layer has an inner surface defining macropores.

    EXHAUST GAS PURIFICATION CATALYST
    7.
    发明申请
    EXHAUST GAS PURIFICATION CATALYST 审中-公开

    公开(公告)号：US20200340383A1

    公开(公告)日：2020-10-29

    申请号：US16844047

    申请日：2020-04-09

    申请人： Takumi TOJO ,  Takeru YOSHIDA ,  Hiromasa SUZUKI ,  Minoru ITO ,  Kana IWATA

    发明人： Takumi TOJO ,  Takeru YOSHIDA ,  Hiromasa SUZUKI ,  Minoru ITO ,  Kana IWATA

    IPC分类号： F01N3/28 ,  B01J23/44 ,  B01J23/46 ,  B01J35/04 ,  B01J37/02 ,  B01D53/94

    摘要： The present disclosure provides the exhaust gas purification catalyst capable of efficiently converting HC in the upstream region relative to the exhaust gas flow direction in the exhaust gas purification catalyst and capable of efficiently converting NOx in the downstream region relative to the exhaust gas flow direction in the exhaust gas purification catalyst while maintaining the good warming-up performance. The present disclosure relates to an exhaust gas purification catalyst including a monolith substrate formed by a catalyst carrier and a catalyst coat layer coated on the monolith substrate, in which the monolith substrate contains Pd, the catalyst coat layer includes a downstream coat layer, the downstream coat layer contains Rh, a density of the downstream coat layer is in a specific range, the exhaust gas purification catalyst has an upstream region (upstream portion) relative to an exhaust gas flow direction and a downstream region (downstream portion) excluding the upstream region and the upstream portion has a Pd concentration higher than a Pd concentration in the downstream portion.