公开(公告)号：US20170044946A1

公开(公告)日：2017-02-16

申请号：US15235784

申请日：2016-08-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Gennaro MERLINO ,  Jaime Andres CESPEDES GARCIA

IPC: F01N3/08 ,  F02D41/26 ,  F02D41/02 ,  F01N3/035

CPC classification number: F01N3/0885 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/2066 ,  F01N9/005 ,  F01N2250/02 ,  F01N2250/12 ,  F01N2560/025 ,  F01N2560/06 ,  F01N2900/0416 ,  F01N2900/0601 ,  F01N2900/1404 ,  F01N2900/1621 ,  F01N2900/1622 ,  F02D41/0235 ,  F02D41/0275 ,  F02D2200/0802 ,  F02D2200/0806 ,  F02D2200/0811 ,  Y02T10/24 ,  Y02T10/47

Abstract: A method is disclosed for operating an automotive system having an internal combustion engine equipped with an exhaust gas aftertreatment system including a Lean NOx Trap (LNT) upstream of a Selective Catalytic Reduction washcoated particulate filter (SCRF). A LNT inlet temperature is monitored. A parameter representative of a quantity of NOx stored in the LNT is also monitored. A map correlating the LNT inlet temperature and the quantity of NOx stored in the LNT is used to estimate an ammonia quantity produced during a LNT regeneration. A LNT regeneration is performed, if the estimated ammonia quantity is greater than a threshold value thereof.

Abstract translation: 公开了一种用于操作具有内燃机的汽车系统的方法，所述内燃机装备有包括选择性催化还原洗涂微粒过滤器（SCRF）上游的精益NOx捕集阱（LNT）的废气后处理系统。 监测LNT入口温度。 还监视表示存储在LNT中的NOx的量的参数。 使用将LNT入口温度和存储在LNT中的NOx的量相关联的图来估计在LNT再生期间产生的氨量。 如果估计的氨量大于其阈值，则进行LNT再生。