HONEYCOMB BODY FOR CARRYING CATALYST AND CATALYST CONVERTER

• Main Authors: KONYA, Shogo, OMIZU, Masafumi, INAGUMA, Tooru, TSUMURA, Yasuhiro, KASUYA, Masayuki
• Format: Patent
• Language: English; French; German
• Published: 17.06.2020
• Subjects: BLASTING; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; 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; THEIR RELEVANT APPARATUS; TRANSPORTING; WEAPONS

[Problem] To suppress the generation of turbulent flow that does not contribute to the purification of exhaust gas to decrease the pressure loss, and to decrease the amount of the catalyst applied to the region that does not contribute to the purification of exhaust gas. [Solution] A honeycomb core for carrying a catalyst, comprising a flat metal foil and a corrugated metal foil, the flat metal foil and the corrugated metal foil being layered, wherein the corrugated foil is configured by repeating a concavo-convex shaped part including a first top surface that is in contact with one of the flat foils adjacent in a layering direction, a second top surface that is in contact with another flat foil adjacent in the layering direction and is disposed at a position where the second top surface avoids the first top surface as viewed in the layering direction, and an inclined leg surface that has one end connected to the first top surface through a first bent part and another end connected to the second top surface through a second bent part, and extends in a direction inclined with respect to the first top surface and the second top surface, and has an offset part having different wave phases between front and rear in an axial direction of the honeycomb core,the first bent part and the second bent part each have a R shape,a radius of curvature R1 of an inner edge of the first bent part and a radius of curvature R2 of an inner edge of the second bent part satisfy the following conditional expressions (1) and (2), respectively, and a separation distance h in the layering direction between the first top surface and the second top surface and a separation distance S between a pair of the inclined leg surfaces connected to the first top surface through the first bent parts satisfy the following conditional expression (3) :0.02 (mm) ‰¤ R1 ‰¤ 2.0 (mm) (1),0.02 (mm) ‰¤ R2 ‰¤ 2.0 (mm) (2), and 1.5 ‰¤ S/h ‰¤ 10 (3).