Toyota Jidosha Kabushiki Kaisha

Ibiden Company Limited

Cataler Corporation

Denso Corporation

Ngk Insulators, Inc.

Masaru Kakinohana

Hirohito Hirata

Takeru Yoshida

Hiromasa Suzuki

Masaya Ibe

Takumi Tojo

Shinnosuke Goto

Tsuyoshi Okada

Shogo Shirakawa

Masashi Nose

Minoru Itou

Yoshiyuki Kasai

Kenji Katoh

Akira Mizuno

Hiroyuki Matsubara

Kana Iwata

Fukutaroh Mori

Yuriko Takahashi

Hiroya Yamamoto

Keita Hashimoto

Koji Yokota

Tsuyoshi Watanabe

Tadato Ito

Shinji Tsuji

Mayuko Osaki

Atsushi Tanaka

Yuji Sakakibara

Hideo Yahagi

Masanori Yamato

Misako Makino

Kouzi Banno

Suguru Imamura

Koichi Uemura

Shunsuke Ohishi

Daisuke Mori

Takeo Kobayashi

Tomoaki Sunada

Satoshi Kamitani

Yoshihiko Itoh

Yuuichi Sobue

Masaya Toyota Jidosha Kabushiki Kaisha Ibe

Hirohito Toyota Jidosha Kabushiki Kaisha Hirata

An exhaust gas purification catalyst apparatus has a honeycomb base material and a catalyst noble metal supported by the honeycomb base material, wherein: the honeycomb base material contains ceria-zirconia composite oxide particles as one of the constituent materials, is of a wall flow type, and includes inlet-side cells and outlet-side cells demarcated by porous partition walls; the catalyst noble metal is supported in inlet-side support regions and outlet-side support regions; each of the inlet-side support regions is formed with a specific length from the exhaust gas flow upstream end; the catalyst noble metal 70% support depth is not greater than 50% of the thickness of the porous partition walls; each of the outlet-side support regions is formed with a specific length from the exhaust gas flow downstream end; and the catalyst noble metal 70% support depth is greater than 50% of the thickness of the porous partition walls.

Exhaust gas purification catalyst apparatus

An exhaust gas purification catalytic device includes: a substrate; at least one type of noble-metal catalyst that is supported on the substrate; and a coating layer on the surface of the substrate. The substrate includes a plurality of cells which are demarcated by porous walls. The substrate and the coating layer each include ceria-zirconia composite oxide particles.

Exhaust gas purification catalytic device

The present invention provides a method of producing a honeycomb structured body having excellent mechanical strength. The present invention relates to a method of producing a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, the method including: a raw material mixing step of preparing a raw material paste containing ceria-zirconia composite oxide particles, alumina particles, an inorganic binder, and inorganic fibers; a molding step of molding the raw material paste into a honeycomb molded body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; a drying step of drying the honeycomb molded body obtained in the molding step; and a firing step of firing the honeycomb molded body dried in the drying step into a honeycomb fired body, wherein the raw material mixing step includes pre-mixing of the inorganic binder and the inorganic fibers.

Method of producing honeycomb structured body

The present invention provides a method of producing a honeycomb structured body having excellent mechanical strength. The present invention relates to a method of producing a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, the method including: a raw material mixing step of preparing a raw material paste containing ceria-zirconia composite oxide particles, alumina particles, an inorganic binder, and alumina fibers; a molding step of molding the raw material paste into a honeycomb molded body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; a drying step of drying the honeycomb molded body obtained in the molding step; and a firing step of firing the honeycomb molded body dried in the drying step into a honeycomb fired body, wherein the percentage of amorphous alumina fibers in the alumina fibers for use in the raw material mixing step is 50 to 100 wt %.

The present disclosure provides a monolith substrate used for an exhaust gas purifying catalyst that improves purification performance, a method for producing such monolith substrate, and an exhaust gas purifying catalyst comprising such monolith substrate. The present disclosure relates to a monolith substrate comprising an alumina-ceria-zirconia composite oxide and alumina, a method for producing such monolith substrate, and an exhaust gas purifying catalyst comprising such monolith substrate.

Monolith substrate, method for producing monolith substrate, and exhaust gas purification catalyst comprising monolith substrate

A reuse evaluation system is a system that performs an evaluation to reuse a catalyst in a state where the catalyst that purifies an exhaust gas of an engine of a vehicleis mounted on the vehicle. The reuse evaluation system includes a deterioration estimator that estimates a degree of deterioration of the catalyst based on an operating state of the vehicle, a reuse setting unit that sets a range of the degree of deterioration of the catalyst as a reuse range of the catalyst according to a usage of reuse of the catalyst, and a reuse determining unit that determines that the catalyst is reusable in the reuse usages when the degree of deterioration of the catalyst estimated by the deterioration estimator is within the reuse range set by the reuse setting unit.

Reuse evaluation system for catalyst

A method for reusing a vehicular catalyst that ensures effective reuse of a catalyst discarded when a vehicle is discarded is provided. A catalyst deterioration level of a catalytic converter is diagnosed, a catalyst that has a value of the deterioration level diagnosed to be smaller than a predetermined value is determined as a reusable catalyst, and the catalytic converter that includes the catalyst determined as the reusable catalyst is removed from a discarded vehicle. The removed catalytic converter is stored in association with a vehicle type and a manufacturing time of the discarded vehicle. When an abnormality occurs in a catalyst of a drivable vehicle corresponding to the vehicle type and the manufacturing time, a catalytic converter that includes the abnormal catalyst is replaced with the stored catalytic converter.

Method for reusing vehicular catalyst

A honeycomb structured body includes a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween. The honeycomb fired body contains ceria-zirconia composite oxide particles and inorganic fibers. 60 to 80% of inorganic fibers observed in a cross-sectional image of the honeycomb structured body cut in a cross-sectional direction perpendicular to a longitudinal direction have a ratio of the length of a long axis to the length of a short axis (long axis/short axis) of 1.00 to 1.30. The length of the long axis is the length of a long axis of a cross section of an inorganic fiber shown in the cross-sectional image. The length of the short axis is the length of a perpendicular bisector of the long axis.

Honeycomb structured body

The present invention provides a honeycomb structured body containing a ceria-zirconia composite oxide and being less susceptible to ring-off cracking. The honeycomb structured body of the present invention includes a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body contains ceria-zirconia composite oxide particles and inorganic fibers, and a b-axis thermal expansion coefficient measured in a direction along a b-axis representing a direction perpendicular to a longitudinal direction of the honeycomb structured body is higher than an a-axis thermal expansion coefficient measured in a direction along an a-axis representing the longitudinal direction of the honeycomb structured body.

The present invention provides a honeycomb structured body capable of achieving more effective use of a catalyst in partition walls and having excellent exhaust gas conversion performance. The present invention relates to a honeycomb structured body including: a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body contains ceria-zirconia composite oxide particles and alumina particles, the partition wall of the honeycomb fired body contains macropores having a pore size of 2 to 50 &#x3bc;m, and in an electron microscope image of a cross section of the partition wall, the percentage of the area occupied by pores having a pore size of 5 to 15 &#x3bc;m is at least 85% of the total area of the macropores.

To provide a catalytic converter that reduces non-uniformity of temperature of a catalyst support and that can approach a uniform temperature distribution, and a structural body for supporting a catalyst that structures this catalytic converter. At a catalyst support, gradually decreasing width portions, at which a width thereof gradually decreases toward electrode centers, are formed at regions where electrodes, are contactingly disposed, as seen in a cross-section orthogonal to a direction in which exhaust flows. The width is shorter than a length of a center line at a given position. Heat generation and heat dissipation of the catalyst support are balanced overall.

Structural body for supporting a catalyst, and catalytic converter

A device for purification of exhaust gas including: an exhaust gas passageconnected to an internal combustion engine; a particulate matter trapping devicewhich is disposed in the exhaust gas passage, and which traps particulate matters in exhaust gas; ozone supply meanswhich is connected to the exhaust gas passageand on an upstream side of the particulate matter trapping device, and which can supply ozone to the particulate matter trapping device; and an NO oxidizing catalystwhich is disposed in the exhaust gas passageand on an upstream of the ozone supply means, and which oxidizes NO in the exhaust gas.

Device for purification of exhaust gas

The present invention provides an exhaust gas purifying device including an electrically insulated hollow cylindrical case, a cylindrical outer circumferential electrode arranged on an inner wall of the hollow cylindrical case, a bar-shaped center electrode held on a center axis of the outer circumferential electrode, and a metallic hollow cylindrical body arranged between the outer circumferential electrode and the center electrode, wherein the metallic hollow cylindrical body is electrically insulated and has a plurality of holes to permit particulate matter to pass therethrough without being accumulated.

Exhaust gas purifying device

A device for controlling an internal combustion engine comprises a device for trapping particulate matter (PM) in exhaust gas in an exhaust passage, means for supplying ozone to the particulate matter trapping device from the upstream thereof to oxidize and remove PM deposited in the device, and means for interrupting the fuel injection of the internal combustion engine upon the execution of ozone supply by the ozone supply means. It is possible to prevent components consuming ozone, such as NOx, from being contained in the exhaust gas of the internal combustion engine, whereby ozone is effectively usable.

Device and method for controlling internal combustion engine

There is provided an exhaust purifying system for an internal combustion engine which can achieve a function of a catalyst without deteriorating a function of ozone at the time of oxidizing and removing PM by using the ozone. The exhaust purifying system for the internal combustion engine comprises a wall-flow type particulate filter () for collecting particulate matter in an exhaust gas inside an exhaust passage, wherein the catalyst () is supported only in a part of a partition wall () of the particulate filter defining a passage () on the downstream side of the partition wall (). In consequence, when ozone is supplied, since the ozone is introduced on the upstream side of the partition wall () in which the PM is collected, the ozone does not contact the catalyst supported only in the part of the partition wall defining the passage () on the downstream side of the partition wall. Therefore, it is prevented that the ozone is decomposed, and a PM oxidation function is achieved.

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Susono, Japan

Masaru Kakinohana