公开(公告)号：WO2016130634A1

公开(公告)日：2016-08-18

申请号：PCT/US2016/017278

申请日：2016-02-10

Applicant: FCA US LLC

Inventor： SMITH, Michael A. ,  DIMAGGIO, Craig L. ,  WUTTKE, Jeffrey P. ,  BROCKER, Andrew ,  HAMILTON, Travis T. ,  HARDMAN, Ken ,  BALDWIN-SQUIB, Cody

IPC: F01N3/20 ,  F01N3/08 ,  F01N3/10 ,  F01N13/10 ,  F01N13/04 ,  F01N13/00

CPC classification number: F01N3/2073 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/106 ,  F01N3/208 ,  F01N13/008 ,  F01N13/011 ,  F01N13/04 ,  F01N13/107 ,  F01N2240/25 ,  F01N2430/02 ,  F01N2430/06 ,  F01N2610/02 ,  F01N2900/1616 ,  F01N2900/1814 ,  Y02T10/22 ,  Y02T10/24

Abstract: A system and method for utilizing fuel as an on-board reductant for selective catalytic reduction of NOx is provided and includes a controller for controlling an engine to produce a lean first exhaust stream and a rich second exhaust stream that are received in respective first and second passageways of a dual path aftertreatment system. The rich second exhaust stream reacts with NOx stored in a NOx storage and reduction catalyst of the second passageway to regenerate this catalyst and generate ammonia. The first exhaust stream and the second exhaust stream having the generated ammonia are combined in a downstream common passageway to form a combined lean exhaust gas stream where the ammonia carried therein is stored or used by an SCR catalyst of the common passageway for NOx reduction. The engine is subsequently controlled to produce a rich first exhaust stream and a lean second exhaust stream.

Abstract translation: 提供了一种用于利用燃料作为板上还原剂用于选择性催化还原NOx的系统和方法，并且包括用于控制发动机以产生稀薄的第一排气流和富集的第二排气流的控制器，所述第一排气流和第二排气流在相应的第一和第二 双路后处理系统的通道。 富含的第二废气流与存储在第二通道的NOx储存和还原催化剂中的NOx反应，以再生该催化剂并产生氨。 具有生成的氨的第一排气流和第二排气流在下游公共通道中组合以形成组合的贫排气流，其中运载在其中的氨由用于NOx还原的公共通道的SCR催化剂储存或使用。 发动机随后被控制以产生富有的第一排气流和贫的第二排气流。