公开(公告)号：US11480091B2

公开(公告)日：2022-10-25

申请号：US17540741

申请日：2021-12-02

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Naoto Nagata ,  Kazushi Wakayama

IPC: F01N13/00 ,  F01N11/00 ,  B01D53/94 ,  B01J21/00 ,  B01J23/58 ,  B01J35/02 ,  B01J35/10 ,  F01N3/10

Abstract: An exhaust gas purification system of the present disclosure includes a first exhaust gas purification device that purifies exhaust gas discharged from an internal combustion engine and a second exhaust gas purification device that additionally purifies the exhaust gas purified by the first exhaust gas purification device, wherein the exhaust gas is exhaust gas with a gaseous composition in which an amount of reducing agents is in excess compared to a stoichiometric gaseous composition and a gaseous composition in which an amount of oxidants is in excess compared to the stoichiometric gaseous composition are alternately switched between, the first exhaust gas purification device includes a three-way catalyst, and the second exhaust gas purification device includes an exhaust gas purification catalyst containing spinel-type MgAlxFe2.00−xO4.00 supporting particles on which Rh is supported, where 0.00

公开(公告)号：US11365661B2

公开(公告)日：2022-06-21

申请号：US17081133

申请日：2020-10-27

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Naoto Nagata ,  Daisuke Shimoyama

IPC: F01N3/10 ,  F01N13/00 ,  B01J21/00

Abstract: There is provided an exhaust gas purification system that allows efficient purification of NOx present in exhaust gas emitted from an internal combustion engine. The exhaust gas purification system of the disclosure comprises a first exhaust gas purification device that purifies exhaust gas emitted from an internal combustion engine, wherein the atmosphere alternately switches between a reducing agent-excess atmosphere and an oxidizing agent-excess atmosphere with respect to the stoichiometric atmosphere, and a second exhaust gas purification device that further purifies the exhaust gas that has been purified by the first exhaust gas purification device, wherein the first exhaust gas purification device has a three-way catalyst, and the second exhaust gas purification device has an exhaust gas purifying catalyst that comprises an AMn2O4 spinel-type oxide support (A=Mg, Zn or Li) on which a precious metal is supported.

公开(公告)号：US11298674B2

公开(公告)日：2022-04-12

申请号：US16375369

申请日：2019-04-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Naoto Nagata ,  Daisuke Shimoyama

IPC: B01J20/02 ,  B01J20/08 ,  B01J20/28 ,  B01J20/30 ,  F01N3/08

Abstract: An object of the present disclosure is to provide an NOx storage material having sufficient NOx storage capacity even in a low temperature region and a production method thereof.
An NOx storage material including a composite oxide of silver and gallium. The composite oxide of silver and gallium is preferably a delafossite-type composite oxide. The composite oxide is produced by dissolving a silver salt and a gallium salt in a solvent and baking the solution, wherein the molar ratio of silver:gallium is preferably from 2:8 to 7:3.

公开(公告)号：US11208928B2

公开(公告)日：2021-12-28

申请号：US16382981

申请日：2019-04-12

Applicant: Toyota Motor Engineering & Manufacturing North America, Inc. ,  Toyota Jidosha Kabushiki Kaisha

Inventor： Krishna Gunugunuri ,  Charles Alexander Roberts ,  Torin C. Peck ,  Naoto Nagata

IPC: B01J23/83 ,  B01J20/02 ,  F01N3/08 ,  F01N3/10 ,  F01N3/20

Abstract: NOx abatement compositions include cobalt oxide (Co3O4) doped with cerium, and have an overall formula Co3-xCe-O4, with cerium occupying tetrahedral and/or octahedral sites in the spinel structure. The NOx abatement compositions possess NOx storage and NOx direct decomposition activity. Dual stage NOx abatement devices include an upstream portion having the NOx abatement composition to adsorb and store NOx at low temperature, and then release the NOx at higher temperature to a downstream catalytic conversion portion.

公开(公告)号：US20200325810A1

公开(公告)日：2020-10-15

申请号：US16382981

申请日：2019-04-12

Applicant: Toyota Motor Engineering & Manufacturing North America, Inc. ,  Toyota Jidosha Kabushiki Kaisha

Inventor： Krishna Gunugunuri ,  Charles Alexander Roberts ,  Torin C. Peck ,  Naoto Nagata

IPC: F01N3/08 ,  B01J20/02 ,  F01N3/10 ,  F01N3/20 ,  B01J23/83

Abstract: NOx abatement compositions include cobalt oxide (Co3O4) doped with cerium, and having an overall formula Co3-xCexO4, with cerium occupying tetrahedral and/or octahedral sites in the spinel structure. The NOx abatement compositions possess NOx storage and NOx direct decomposition activity. Dual stage NOx abatement devices include an upstream portion having the NOx abatement composition to adsorb and store NOx at low temperature, and then release the NOx at higher temperature to a downstream catalytic conversion portion.