ENGINE EXHAUST TREATMENT HAVING DUAL NOx TRAPS

• Main Authors: BUGLASS, JOHN, G, LIU, KE
• Format: Patent
• Language: English; French
• Published: 30.03.2006
• 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 single valve (23, 50) directs engine exhaust (11, 12) toward alternative nitrous oxide traps (19, 20) which are adjacent to either diesel particulate filters (40, 41) or low temperature water gas shift catalysts (63, 64). Syngas is either provided from a source (54) or by in-line catalytic partial oxidizers (23, 24) which may have diesel oxidation catalysts ahead of them in the flow and which receive fuel from the engine fuel source (26) through nozzles (27, 28). La présente invention a trait à un système dans lequel une soupape unique (23, 50) oriente les gaz d'échappement de moteur (11, 12) vers des pièges alternés d'oxydes nitreux (19, 20) qui sont adjacents à des filtres particulaires diesel (40, 41) ou des catalyseurs de conversion basse température (63, 64). Un gaz synthétique est fourni soit depuis une source (54) ou par des oxydants partiels catalytiques en ligne (23, 24) qui peuvent comprendre des catalyseurs d'oxydation diesel les précédant dans le flux et qui reçoivent du carburant depuis une source de carburant du moteur (26) à travers des buses (27, 28).