HONEYCOMB SINTERED BODY AND HONEYCOMB FILTER

• Main Author: NAGATSU Yuichi
• Format: Patent
• Language: English; French; German
• Published: 19.07.2017
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STEAM ENGINES; TRANSPORTING; WEAPONS

Provided is a honeycomb fired body and a honeycomb filter including the honeycomb fired body in which the pressure loss in the initial state where PM has not accumulated is sufficiently low, the strength is sufficiently high, and the heat capacity is not small. The honeycomb fired body of the present invention includes a plurality of cells that serve as channels of exhaust gas; porous cell partition walls defining the cells; and an outer wall formed at a periphery thereof, the cells including exhaust gas introduction cells in each of which an end on an exhaust gas inlet side is open and an end on an exhaust gas outlet side is plugged, and exhaust gas emission cells in each of which an end on the exhaust gas outlet side is open and an end at the exhaust gas inlet side is plugged, wherein the cross-sectional shape of the exhaust gas introduction cells in a plane perpendicular to the longitudinal direction thereof is constant from the end on the exhaust gas inlet side to the end on the exhaust gas outlet side except for the plugged portion, the cross-sectional shape of the exhaust gas emission cells in a plane perpendicular to the longitudinal direction thereof is constant from the end on the exhaust gas inlet side to the end on the exhaust gas outlet side except for the plugged portion, the exhaust gas emission cells except for the cells adjacent to the outer wall are each adjacently surrounded fully by the exhaust gas introduction cells across the cell partition walls, the exhaust gas introduction cells and the exhaust gas emission cells are alternately arranged in a region adjacent to the outer wall, the cross-sectional area of each exhaust gas emission cell located in the region adjacent to the outer wall in a plane perpendicular to the longitudinal direction thereof is larger than the cross-sectional area of each exhaust gas introduction cell located in the region adjacent to the outer wall in a plane perpendicular to the longitudinal direction thereof, and the cell partition walls in contact with the outer wall each have a thick wall region where the wall thickness gradually increases toward the outer wall.