EXHAUST GAS PURIFICATION SYSTEM FOR ENGINE

• Main Authors: NAITOU, YUUJI, HIRAMOTO, HITOSHI, YAMADA, NAOBUMI, HONDA, KOUTAROU, KANAYA, ISAMU, SHIRAI, DAISUKE
• Format: Patent
• Language: English; French; Japanese
• Published: 23.11.2006
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; WEAPONS

A reduction catalyst is placed in an exhaust passage of an engine, and a reducing agent added to an exhaust gas and NOx in the exhaust gas are reacted on the catalyst. A member for passing the exhaust gas added with the reducing agent is provided, and this member is formed by welding in the axial direction. This member is arranged so that the inner surface of the welded portion overhangs in the exhaust passage. La présente invention concerne un catalyseur réducteur placé dans le passage d'échappement d'un moteur et un agent réducteur ajouté à un gaz d'échappement et le NOx contenu dans le gaz d'échappement réagissent sur le catalyseur. Un élément est prévu pour faire passer le gaz d'échappement ajouté à l'agent réducteur et cet élément est formé par soudage dans la direction axiale. Cet élément est agencé de façon à ce que la surface intérieure de la partie soudée fasse saillie dans le passage d'échappement.