AUTOMOTIVE CATALYTIC AFTERTREATMENT SYSTEM

• Main Authors: COLE KIERAN, NEWMAN COLIN, SAVAGE RUTH, TINGAY ISABEL, SMEDLER GUDMUND, SONNTAG OLIVIER
• Format: Patent
• Language: English; Korean
• Published: 02.10.2019
• 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

디젤 엔진 배기 가스를 위한 촉매 후처리 시스템이 설명된다. 이 시스템은 디젤 산화 촉매(DOC) 및 디젤 산화 촉매(DOC)의 하류에 위치된 후처리 장치를 포함하며, 후처리 장치는 주기적 열 처리, 및 후처리 장치 내에서 온도 증가를 생성하기 위한 수단을 필요로 하고, 상기 디젤 산화 촉매(DOC)는 디젤 산화 촉매(DOC)의 나머지 부분보다 탄화수소(HC)에 대한 산화 활성이 더 높은 0.5 내지 2인치(12.7-50.81mm) 길이의 상류 구역을 포함한다. A catalytic aftertreatment system for a diesel engine exhaust gas is described. The system comprises a diesel oxidation catalyst (DOC) and an aftertreatment device located downstream of the diesel oxidation catalyst (DOC), which aftertreatment device requires periodic heat treatment, and means to generate a temperature increase within the aftertreatment device, said diesel oxidation catalyst (DOC) comprising an upstream zone of length from 0.5 to 2 inches (12.7-50.81 mm) of higher oxidation activity for hydrocarbons (HC) than the remainder of the diesel oxidation catalyst (DOC).