Ibiden Company Limited

Aisan Kogyo Kabushiki Kaisha

Yuki Fujita

Masafumi Kunieda

Hiroki Sato

Kazushige Ohno

Koichi Uemura

Ikuhito Teshima

Takehiro Umemoto

Hikaru Yoshida

Masafumi Kuneda

In this evaporated fuel treatment apparatus, there are set a purge condition that is a condition for performing purge control, a first pre purge condition that is met before the purge condition is met, and a second pre purge condition that is met between the purge condition and the first pre purge condition. A purge pump is driven at an idling speed lower than a rated speed to execute idle rotation when the first pre purge condition is met. The purge pump is driven at the rated speed to execute rated rotation when the second pre purge condition is met. A purge valve is opened while the rated rotation is performed when the purge condition is met.

Evaporated fuel treatment apparatus

An evaporated fuel treatment apparatus includes a canister, a purge passage, a purge pump, a purge valve, and a controller for executing purge control. The controller is configured to switch the purge valve to a closed state or an open state once, subsequently set a concentration sensing flag to ON, and then detect a purge concentration based on a pump downstream pressure or a pump differential pressure at a predetermined timing elapsed by a predetermined time from setting of the concentration sensing flag to ON.

A method of manufacturing a honeycomb structure including a honeycomb unit includes causing inorganic particles to contain water. The inorganic particles have a specific surface area of approximately 50 m/g or more. Raw material paste for the honeycomb unit is prepared. The raw material paste includes a molding aid, water, and the inorganic particles containing water. The raw material paste is molded into a honeycomb molded body. The honeycomb molded body is fired to obtain the honeycomb unit. The honeycomb unit have a plurality of cells extending from a first end face to a second end face of the honeycomb unit along a longitudinal direction of the honeycomb unit and is separated by a plurality of cell walls.

Method of manufacturing honeycomb structure

A honeycomb structural body includes at least one honeycomb unit including a &#x3b2; type zeolite, a phosphate group zeolite, and an inorganic binder and having a plurality of through holes divided by partition walls and arranged in a longitudinal direction of the honeycomb unit. The &#x3b2; type zeolite includes secondary particles having an average particle diameter of approximately 0.5 &#x3bc;m or more and approximately 5 &#x3bc;m or less. The phosphate group zeolite includes primary particles having an average particle diameter of approximately 0.5 &#x3bc;m or more and approximately 5 &#x3bc;m or less. A ratio of a mass of the phosphate group zeolite with respect to a total mass of the &#x3b2; type zeolite and the phosphate group zeolite is approximately 5% or more and approximately 35% or less.

Honeycomb structural body and exhaust gas conversion apparatus

A method for manufacturing a honeycomb structural body having a honeycomb unit includes obtaining a honeycomb molded body including a compound containing a phosphate group zeolite and an inorganic binder. The honeycomb molded body has a plurality of through holes that are defined by cell walls and arranged in a longitudinal direction of the honeycomb molded body. The honeycomb molded body is dried. The dried honeycomb molded body is fired to obtain the honeycomb unit. At least one of the honeycomb unit and the dried honeycomb molded body is stored so that a difference in moisture content is approximately 5 mass % or less between a moisture content of the cell walls at a center part of a cross section perpendicular to the longitudinal direction and a moisture content of the cell walls at an outer periphery part of the cross section perpendicular to the longitudinal direction.

Method for manufacturing honeycomb structural body and method for manufacturing exhaust gas converting apparatus

A honeycomb structure includes a honeycomb unit. The honeycomb unit includes plural cells, inorganic particles, and at least one of a flake substance, a tetrapod-shaped substance, and a three-dimensional needle-shaped substance. The plural cells extend from a first end face to a second end face of the honeycomb structure along a longitudinal direction of the honeycomb structure. The plural cells are defined by cell walls.

Honeycomb structure

A honeycomb structural body includes a honeycomb unit having a plurality of through holes defined by cell walls and arranged in a longitudinal direction of the honeycomb unit. The honeycomb unit includes an inorganic binder, a first zeolite, and second zeolite. The first zeolite includes at least one of a &#x3b2; type zeolite and a ZSM-5 type zeolite, and primary particles having an average particle diameter of approximately 0.01 &#x3bc;m or more and approximately 0.1 &#x3bc;m or less. The second zeolite includes a phosphate group zeolite and primary particles having an average particle diameter of approximately 0.5 &#x3bc;m or more and approximately 5 &#x3bc;m or less. A ratio between a mass of the first zeolite and a total mass of the first and second zeolites is approximately 0.1 or more and approximately 0.5 or less.

Honeycomb structural body and exhaust gas converting apparatus

A honeycomb structure includes four honeycomb units each including inorganic particles, an inorganic binder, and cell walls extending from a first end face to a second end face along a longitudinal direction to define a plurality of cells. The cell walls includes a first cell walls extending along a first direction in a cross sectional plane perpendicular to the longitudinal direction and a second cell walls extending along a second direction substantially perpendicular to the first direction in the cross sectional plane. Adhesive layers are provided between the four honeycomb units to connect the four honeycomb units. The adhesive layers extend in a first extending direction and a second extending direction substantially perpendicular to the first extending direction in the cross sectional plane. A minimum angle between the first direction and the first extending direction or the second extending direction is approximately 22.5 degrees to approximately 45 degrees.

Honeycomb structure and exhaust gas treating apparatus

A method of manufacturing a porous sintered body includes mixing first silicon carbide particles, second silicon carbide particles, and a pore forming material having an average particle diameter Y &#x3bc;m to obtain a molding material. The first silicon carbide particles have an average particle diameter X &#x3bc;m larger than an average particle diameter of the second silicon carbide particles. Relationships 15&#x2266;X, 0.5&#xb7;X&#x2266;Z&#x2266;0.9&#xb7;X, and 0.8&#xb7;Z&#x2266;Y&#x2266;1.8&#xb7;Z are satisfied, wherein Z &#x3bc;m is an average pore diameter of the porous sintered body no less than 10 &#x3bc;m and no greater than 20 &#x3bc;m. The molding material is molded into a molded body. The molded body is degreased to eliminate the pore forming material from the molded body.

Porous sintered body, method of manufacturing porous sintered body, and method of manufacturing exhaust gas purifying apparatus

A honeycomb unit includes a plurality of walls and a plurality of cells. The plurality of cells are defined by the plurality of walls and extend along a longitudinal direction of the honeycomb unit. Each of the plurality of cells has opposite first and second end portions along the longitudinal direction. Either one of the first and second end portions is sealed. X and Y satisfy a following relationship, 100/3&#xb7;X+5&#x2266;Y&#x2266;100/3&#xb7;X+40, wherein Y is a ratio of a weight of an unsealed region in said cells to a weight of a sealed region in said cells and X is a ratio of a length in the longitudinal direction of said honeycomb unit to an area of a cross-section perpendicular to the longitudinal direction of said honeycomb unit. X is at least about 0.1 and at most about 0.26.

Honeycomb unit and honeycomb structure

In the ceramic honeycomb structural body comprised of an assembly formed by assembling and integrating a plurality of pillar-shaped porous honeycomb ceramic members, each member comprising numbers of cells juxtaposed in parallel to the longitudinal direction and defined by cell walls, the cross section area perpendicular to the longitudinal direction at each end portion of the members is made larger than that at the center portion of the member.

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Gifu, Japan

Yuki Fujita