公开(公告)号：US20150337702A1

公开(公告)日：2015-11-26

申请号：US14286284

申请日：2014-05-23

Applicant: Tenneco Automotive Operating Company Inc.

Inventor： Padmanabha Reddy Ettireddy ,  Adam J. Kotrba ,  Michael Golin

IPC: F01N3/035

CPC classification number: F01N3/035 ,  B01D53/9418 ,  B01D53/9477 ,  B01D53/9495 ,  B01D2251/2062 ,  B01D2251/2067 ,  B01D2255/2065 ,  B01D2255/20707 ,  B01D2255/20723 ,  B01D2255/2073 ,  B01D2255/20738 ,  B01D2255/20746 ,  B01D2255/20761 ,  B01D2255/30 ,  B01D2255/40 ,  B01D2255/50 ,  B01D2258/012 ,  F01N3/106 ,  F01N3/2053 ,  F01N3/2066 ,  F01N13/009 ,  F02B37/00 ,  Y02T10/144 ,  Y02T10/24

Abstract: An aftertreatment system may treat exhaust gas discharged from an engine. The system may include first and second selective-catalytic-reduction (SCR) catalysts and a valve. The valve may be disposed upstream of the first SCR catalyst and at least one of an oxidation catalyst and a particulate filter. The valve is connected to first and second exhaust flow paths and is movable between a first position allowing exhaust gas to flow through the first flow path and bypass the second flow path and a second position allowing exhaust gas to flow through the second flow path and bypass the first flow path. The second SCR catalyst may be a low-temperature SCR catalyst and may be disposed in the second flow path. A control module may cause the valve to move between the first and second positions based on a temperature of the exhaust gas and/or a temperature of the engine.

Abstract translation: 后处理系统可以处理从发动机排出的废气。 该系统可以包括第一和第二选择性催化还原（SCR）催化剂和阀。 阀可以设置在第一SCR催化剂的上游和氧化催化剂和颗粒过滤器中的至少一个。 阀连接到第一和第二排气流动路径，并且可在允许废气流过第一流动路径并绕过第二流动路径的第一位置和允许废气流过第二流动路径和旁路的第二位置之间移动 第一个流路。 第二SCR催化剂可以是低温SCR催化剂，并且可以设置在第二流路中。 控制模块可以使得阀基于排气的温度和/或发动机的温度在第一和第二位置之间移动。