公开(公告)号：US11224840B2

公开(公告)日：2022-01-18

申请号：US15560772

申请日：2016-03-24

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  CATALER CORPORATION

Inventor： Hiromasa Suzuki ,  Masahide Miura ,  Yoshinori Saito ,  Satoru Katoh ,  Toshitaka Tanabe ,  Tetsuhiro Hirao ,  Tatsuya Ohashi ,  Hiroaki Naito ,  Hirotaka Ori ,  Michihiko Takeuchi ,  Keiichi Narita

IPC: B01J23/10 ,  B01D53/94 ,  B01J37/08 ,  B01J35/10 ,  B01J37/02 ,  B01J35/02 ,  B01J35/00 ,  B01J23/63 ,  B01J37/00 ,  B01J23/56 ,  B01J35/04 ,  F01N3/10 ,  F01N3/28

Abstract: An object of the present invention is to provide an exhaust gas purification catalyst which can exhibit sufficient purification performance even under a high Ga condition. The present invention relates to an exhaust gas purification catalyst comprising a substrate and a catalyst coating layer formed on the substrate, wherein the catalyst coating layer comprises catalyst particles, the catalyst coating layer having an upstream region extending by 40 to 60% of the entire length of the substrate from an upstream end of the catalyst in the direction of an exhaust gas flow and a downstream region corresponding to the remainder portion of the catalyst coating layer, the composition of the catalyst particle of the upstream region being different from that of the downstream region. The downstream region in the direction of an exhaust gas flow has a structure where a void is included in a large number, and furthermore high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain percentage or more of the whole volume of voids. Thus, the exhaust gas purification catalyst exhibits enhanced purification performance.

公开(公告)号：US10183253B2

公开(公告)日：2019-01-22

申请号：US15517978

申请日：2015-10-06

Applicant: CATALER CORPORATION

Inventor： Ryota Onoe ,  Shingo Sakagami ,  Tsuyoshi Ito ,  Tatsuya Ohashi ,  Naoto Miyoshi ,  Masahiko Takeuchi ,  Akemi Sato

IPC: B01D53/94 ,  B01J23/63 ,  B01J35/04 ,  B01J35/00 ,  F01N3/035 ,  B01J23/42 ,  B01J23/44 ,  B01J23/46 ,  F01N3/28

Abstract: The exhaust gas purification device is provided with a wall flow structure substrate that has an entry-side cell, an exit-side cell and a porous partition, first catalyst parts which are formed in small pores having a relatively small pore diameter among internal pores in the partition, and second catalyst parts which are formed in large pores having a relatively large pore diameter among the internal pores in the partition. The first catalyst parts and the second catalyst parts each contain a carrier and at least one type of noble metal from among Pt, Pd and Rh supported on the carrier. The noble metal content in the first catalyst parts is smaller than the noble metal content in the second catalyst parts per 1 liter of substrate volume.

公开(公告)号：US20240278217A1

公开(公告)日：2024-08-22

申请号：US18569653

申请日：2022-06-10

Applicant: Cataler Corporation

Inventor： Tatsuya Ohashi ,  Kohei Takasaki ,  Yu Onohara

IPC: B01J23/46 ,  B01D53/94 ,  B01J35/56

CPC classification number: B01J23/462 ,  B01D53/945 ,  B01J35/56 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2258/01

Abstract: The present invention provides an exhaust gas purification catalyst with excellent warm-up characteristics, which can quickly exhibit effective catalytic activity even when exhaust gas in a relatively low temperature range is introduced. In the exhaust gas purification catalyst disclosed herein, a catalyst support portion provided on the base material includes: a catalyst coat portion having a carrier made of inorganic compound particles and at least one catalyst metal in a supported state on the carrier, and a catalyst metal direct support portion having at least one catalyst metal in a directly supported state on the base material without the carrier, the catalyst metal direct support portion is provided in at least an upstream region of a predetermined length from an upstream end in an exhaust gas passage, and the catalyst coat portion is not provided in the upstream region in the exhaust gas passage and is provided only in a downstream region downstream of the upstream region.

公开(公告)号：US20240110496A1

公开(公告)日：2024-04-04

申请号：US18276298

申请日：2022-02-01

Applicant: Cataler Corporation

Inventor： Ryota Onoe ,  Junichi Hori ,  Ryosuke Takasu ,  Tatsuya Ohashi ,  Shunsuke Oishi

IPC: F01N3/20 ,  B01D53/94 ,  B01J23/46

CPC classification number: F01N3/2026 ,  B01D53/945 ,  B01D53/9495 ,  B01J23/464 ,  B01D2258/012 ,  B01D2258/014 ,  B01D2259/122 ,  B01D2259/4591

Abstract: The present invention provides an ohmic heating-type exhaust gas purification catalyst system. The ohmic heating-type exhaust gas purification catalyst system is configured to perform, based on information of temperature of a catalyst bed input from a temperature detector of an ohmic heating-type exhaust gas purification device, electric current pass control including controls of (1) causing an electric current to pass through a pair of electrodes when the temperature of the catalyst bed is equal to or lower than a first threshold temperature T1 set in a range of 350±25° C., (2) not causing an electric current to pass through the pair of electrodes when the temperature of the catalyst bed exceeds the first threshold temperature T1 and is equal to or lower than a second threshold temperature T2 set in a range of 450±25° C., (3) causing an electric current caused to pass through the pair of electrodes when the temperature of the catalyst bed exceeds the second threshold temperature T2 and is equal to or lower than a third threshold temperature T3 set to be equal to or higher than 550° C., and (4) not causing an electric current to pass through the pair of electrodes when the temperature of the catalyst bed exceeds the third threshold temperature T3.

公开(公告)号：US09981216B2

公开(公告)日：2018-05-29

申请号：US15100747

申请日：2014-12-01

Applicant: CATALER CORPORATION

Inventor： Ryota Onoe ,  Shingo Sakagami ,  Tsuyoshi Ito ,  Tatsuya Ohashi

IPC: B01D50/00 ,  B01D59/50 ,  B01D46/24 ,  F01N3/022

CPC classification number: B01D46/247 ,  F01N3/0222 ,  F01N2330/30 ,  F01N2330/34 ,  F01N2330/38

Abstract: Particulate filter provided in the exhaust gas purification device includes: a wall-flow part having an inlet-side cell that is open only at an end on an exhaust gas inflow side, outlet-side cell adjacent to this inlet-side cell and is open only at an end on an exhaust gas outflow side, a porous wall partitions the inlet-side cell from the outlet-side cell; a straight-flow part having a through cell that penetrates the filter in axial direction and is open at the end on the exhaust gas inflow side as well as the end on the exhaust gas outflow side. In a cross section of the filter orthogonal to its axial direction, cross-sectional areas of the inlet-side cell and outlet-side cell present in an outer peripheral region of the cross section are larger than cross-sectional areas of the inlet-side cells and the outlet-side cell in a central region of the cross section.

公开(公告)号：US20240408543A1

公开(公告)日：2024-12-12

申请号：US18695420

申请日：2022-09-27

Applicant: Cataler Corporation

Inventor： Yu Onohara ,  Ryoichi Ogawa ,  Tatsuya Ohashi

IPC: B01D53/94 ,  B01J29/76 ,  B01J35/30

Abstract: An exhaust gas purifying system for a gasoline engine with high NH3 purifying performance after duration is provided. The exhaust gas purifying system for a gasoline engine disclosed herein is configured to be disposed in an exhaust path of the gasoline engine. The exhaust gas purifying system includes an upstream catalyst converter including a first catalyst body and a downstream catalyst converter including a second catalyst body. The first catalyst body contains a catalyst precious metal. The second catalyst body has a structure in which an NH3 adsorption layer and a catalyst layer are stacked on a base material. The NH3 adsorption layer of the second catalyst body contains a zeolite as an NH3 adsorber. The catalyst layer of the second catalyst body contains a catalyst precious metal and an OSC material.

公开(公告)号：US20230302434A1

公开(公告)日：2023-09-28

申请号：US18019162

申请日：2021-07-19

Applicant: Cataler Corporation

Inventor： Tatsuya Ohashi ,  Kohei Takasaki ,  Yu Onohara ,  Keiichi Narita

IPC: B01J23/58 ,  B01J21/06 ,  B01J35/00 ,  B01D53/32

CPC classification number: B01J23/58 ,  B01J21/06 ,  B01J35/0013 ,  B01D53/32 ,  B01D2255/1023 ,  B01D2255/2042 ,  B01D2257/702 ,  B01D2258/01

Abstract: Provided is an exhaust gas purification catalyst that includes a base material containing a silicon-silicon carbide composite material and a catalyst layer containing a barium component and that has excellent high-temperature durability of oxygen storage capacity. The exhaust gas purification catalyst disclosed here includes a base material and a catalyst layer in contact with the base material. The base material contains a silicon-silicon carbide composite material. The catalyst layer contains a platinum-group catalyst, a barium component, and an oxygen storage material. The barium component is one material selected from the group consisting of barium and a barium compound. The barium component is present on at least a surface of the oxygen storage material. The barium component has an average particle size of 100 nm or more and 350 nm or less.

公开(公告)号：US10731532B2

公开(公告)日：2020-08-04

申请号：US15561738

申请日：2016-03-24

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  CATALER CORPORATION

Inventor： Hiromasa Suzuki ,  Masahide Miura ,  Yoshinori Saito ,  Satoru Katoh ,  Toshitaka Tanabe ,  Tetsuhiro Hirao ,  Tatsuya Ohashi ,  Hiroaki Naito ,  Hirotaka Ori ,  Michihiko Takeuchi ,  Keiichi Narita

IPC: F01N3/28 ,  F01N3/00 ,  B01J35/10 ,  B01J37/02 ,  B01J23/63 ,  F01N3/10 ,  B01D53/94 ,  B01J37/00 ,  B01D53/86 ,  B01J23/56 ,  B01J37/04 ,  B01J37/08 ,  B01J35/02

Abstract: The problem of the present invention is to provide an exhaust gas purification catalyst which can exhibit sufficient purification performance under a high Ga condition while having a resistance to stress such as high-temperature and poisonous substances. The present invention relates to an exhaust gas purification catalyst comprising two or more catalyst coating layers on a substrate, wherein a lower catalyst coating layer that is present lower with respect to an uppermost catalyst coating layer has a structure where a large number of voids are included and high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain proportion or more of the whole volume of voids, thereby to improve gas diffusivity in the lower catalyst coating layer.

公开(公告)号：US10539056B2

公开(公告)日：2020-01-21

申请号：US15560625

申请日：2016-03-24

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  CATALER CORPORATION

Inventor： Hiromasa Suzuki ,  Masahide Miura ,  Yoshinori Saito ,  Satoru Katoh ,  Toshitaka Tanabe ,  Tetsuhiro Hirao ,  Tatsuya Ohashi ,  Hiroaki Naito ,  Hirotaka Ori ,  Michihiko Takeuchi ,  Keiichi Narita

IPC: F01N3/10 ,  B01J23/63 ,  B01D53/94 ,  B01J35/10 ,  F01N3/28 ,  B01J37/02 ,  B01J35/02 ,  B01J37/00 ,  B01J35/00 ,  B01J37/08

Abstract: An object of the present invention is to provide an exhaust gas purification catalyst which can exhibit high durability and warm-up performance. The present invention relates to an exhaust gas purification catalyst comprising a substrate and a catalyst coating layer formed on the substrate, wherein the catalyst coating layer comprises catalyst particles, the catalyst coating layer having an upstream region extending by 40 to 60% of the entire length of the substrate from an upstream end of the catalyst in the direction of an exhaust gas flow and a downstream region corresponding to the remainder portion of the catalyst coating layer, the composition of the catalyst particle of the upstream region being different from that of the downstream region. The upstream region in the direction of an exhaust gas flow has a structure where a void is included in a large number, and furthermore high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain percentage or more of the whole volume of voids. Thus, the exhaust gas purification catalyst exhibits enhanced purification performance.

公开(公告)号：US10357744B2

公开(公告)日：2019-07-23

申请号：US15515830

申请日：2015-10-06

Applicant: CATALER CORPORATION

Inventor： Tatsuya Ohashi ,  Shingo Sakagami ,  Tsuyoshi Ito ,  Ryota Onoe ,  Naoto Miyoshi ,  Masahiko Takeuchi ,  Akemi Sato

IPC: F01N3/28 ,  B01D53/94 ,  F01N13/00 ,  B01J23/63 ,  B01J35/00 ,  B01J35/04 ,  F01N3/035 ,  B01J37/02 ,  B01J23/40

Abstract: An exhaust gas purification device of the present invention is provided with: a substrate of wall flow structure having an inlet cell, an outlet cell and a porous partition wall; an upstream catalyst layer, provided inside the partition wall and disposed in an upstream portion of the substrate including an exhaust gas inflow end section; and a downstream catalyst layer, provided inside the partition wall and disposed in a downstream portion of the substrate including an exhaust gas outflow end section. The upstream catalyst layer and the downstream catalyst layer each contain a carrier and at least one noble metal from among Pt, Pd and Rh, supported on the carrier. The noble metal in the upstream catalyst layer and the noble metal in the downstream catalyst layer are different from each other.