公开(公告)号：US20120247085A1

公开(公告)日：2012-10-04

申请号：US13075326

申请日：2011-03-30

申请人： Ronald Graham Silver ,  David Mark Heaton ,  James Joshua Driscoll ,  Aníbal Villatoro Prats ,  Lyn McWilliam

发明人： Ronald Graham Silver ,  David Mark Heaton ,  James Joshua Driscoll ,  Aníbal Villatoro Prats ,  Lyn McWilliam

IPC分类号： F01N3/18 ,  F02D43/00

CPC分类号： F01N3/035 ,  F01N3/0821 ,  F01N3/0842 ,  F01N3/2066 ,  F01N2610/02 ,  Y02T10/24

摘要： An engine system includes an electronically controlled compression ignition engine configured to burn diesel fuel to produce an exhaust with a temperature and NOx to soot ratio. An aftertreatment system is fluidly connected to the engine and includes a diesel oxidation catalyst, a reductant supply, and a diesel particulate filter coated with a NOx reduction catalyst but not the diesel oxidation catalyst. A soot load density in the diesel particulate filter is stabilized by oxidizing soot at about a same rate as the compression ignition engine is supplying soot to the aftertreatment system without active regeneration. A NOx reduction reaction is catalyzed by the NOx reduction catalyst on the diesel particulate filter.

摘要翻译： 发动机系统包括电子控制的压缩点火发动机，其被配置为燃烧柴油燃料以产生具有温度和NOx与烟灰比的排气。 后处理系统流体地连接到发动机，并且包括柴油氧化催化剂，还原剂供应和涂覆有NOx还原催化剂而不是柴油氧化催化剂的柴油微粒过滤器。 柴油颗粒过滤器中的烟灰负荷密度通过以与压缩点火发动机向后处理系统供应烟灰大致相同的速率氧化烟灰来稳定，而无需主动再生。 NOx还原反应由柴油机微粒过滤器上的NOx还原催化剂催化。