公开(公告)号：US08778290B1

公开(公告)日：2014-07-15

申请号：US13848109

申请日：2013-03-21

Applicant: GM Global Technology Operations LLC

Inventor： Shouxian Ren ,  Rahul Mital ,  James B Rodgers

IPC: B01D53/94 ,  F01N3/20 ,  F01N3/28

CPC classification number: B01D53/9477 ,  B01D53/9418 ,  B01D53/944 ,  F01N3/021 ,  F01N3/103 ,  F01N3/2066 ,  F01N13/009 ,  F01N13/0097 ,  F01N2610/02 ,  Y02A50/2341 ,  Y02T10/24

Abstract: An exhaust gas treatment system includes a SCR device and a DOC converter disposed upstream of the SCR device. A DEF dosing system includes an injector disposed upstream of the DOC converter for injecting ammonia reductant into the flow of exhaust gas upstream of the DOC converter. The DOC converter includes a corrugated metallic substrate having an ammonia-neutral oxidation catalyst compound that is operable to oxidize hydrocarbons and carbon monoxide in the flow of exhaust gas, while not reacting with the ammonia reductant in the flow of exhaust gas. The ammonia-neutral oxidation catalyst compound allows the ammonia reductant in the flow of exhaust gas to pass through the DOC converter, for reaction with a selective catalytic reduction composition in the SCR device.

Abstract translation: 排气处理系统包括SCR装置和布置在SCR装置上游的DOC转换器。 DEF配量系统包括设置在DOC转换器上游的喷射器，用于将氨还原剂喷射到DOC转换器上游的废气流中。 DOC转换器包括具有氨 - 中性氧化催化剂化合物的波纹金属基材，其可操作以在排气流中不与氨还原剂反应而在废气流中氧化烃和一氧化碳。 氨 - 中性氧化催化剂化合物允许废气流中的氨还原剂通过DOC转化器，以与SCR装置中的选择性催化还原组合物反应。