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1. 发明申请

WO2011082401A3 ENGINE AND EXHAUST AFTERTREATMENT CONTROL 审中-公开
标题翻译：发动机和排气后处理控制
公开(公告)号：WO2011082401A3
公开(公告)日：2011-11-24
申请号：PCT/US2011020051
申请日：2011-01-03
申请人： CUMMINS IP INC , PONNATHPUR CHETAN
发明人： PONNATHPUR CHETAN
IPC分类号： F01N3/20 , B01D53/94 , F01N3/18 , F01N9/00
CPC分类号： F01N3/2066 , F01N9/00 , F01N11/00 , F01N2570/14 , Y02A50/2344 , Y02C20/10 , Y02T10/24 , Y02T10/47
摘要： A method of controlling an internal combustion engine and exhaust system having an SCR, and engine and exhaust system including an SCR, described herein, monitors, in real time, NOx conversion efficiency of an exhaust flow output by the internal combustion engine through the SCR. A determination is made as to whether the monitored NOx conversion efficiency exceeds a predetermined target conversion efficiency, such as a target based on a predetermined allowable amount of NOx emission. While the monitored NOx conversion efficiency exceeds the predetermined amount, the NOx concentration level in the exhaust flow is increased by an amount based on the difference in the monitored conversion efficiency and the predetermined target conversion efficiency. Another method and engine and exhaust system provided herein tracks an amount of ammonia stored on a catalyst of the SCR based on a feed-forward calculation of injected urea based on engine out NOx mass flow and reduction efficiency of the SCR catalyst based on a temperature of the SCR catalyst, and operates the engine and exhaust system in a NOx-rich mode in which an EGR fraction command is adjusted, based on the tracked amount of stored ammonia, to decrease an amount of EGR gas entering an intake of the internal combustion engine and thereby reduce ammonia stored on the SCR catalyst.
摘要翻译：本文所述的控制具有SCR的内燃机和排气系统的方法以及包括SCR的发动机和排气系统实时监控内燃机通过SCR输出的排气流的NOx转化效率。基于预定的允许的NOx排放量来确定监测的NOx转化效率是否超过预定的目标转化效率，例如目标。当所监测的NOx转化效率超过预定量时，基于监测的转化效率和预定的目标转化效率的差异，将排气流中的NOx浓度水平增加一定量。本文提供的另一种方法和发动机和排气系统基于基于发动机排出的NOx质量流量和SCR催化剂的还原效率基于喷射的尿素的前馈计算来追踪存储在SCR的催化剂上的氨的量， SCR催化剂，并且基于跟踪的储存氨量来调整发动机和排气系统处于其中EGR分数指令被调整的富含NOx的模式中，以减少进入内燃机的进气的EGR气体的量并由此减少存储在SCR催化剂上的氨。

2. 发明申请

WO2012040597A3 SYSTEM, METHOD, AND APPARATUS FOR DELIVERING HIGHLY ATOMIZED DIESEL EXHAUST FLUID TO AN EXHAUST AFTERTREATMENT SYSTEM 审中-公开
标题翻译：用于将高度雾化的柴油机排气流体输送到排气后处理系统的系统，方法和设备
公开(公告)号：WO2012040597A3
公开(公告)日：2012-06-07
申请号：PCT/US2011053025
申请日：2011-09-23
申请人： CUMMINS INC , PONNATHPUR CHETAN , APEWOKIN STEPHANIE L , HOLL STEVE , BURKE JIM F , HEICHELBECH JOHN , MYER ANDREW , ZACZEK MELISSA A , CHAI YONGQUAN , BURMEISTER ERIC , GARRETT NATE
发明人： PONNATHPUR CHETAN , APEWOKIN STEPHANIE L , HOLL STEVE , BURKE JIM F , HEICHELBECH JOHN , MYER ANDREW , ZACZEK MELISSA A , CHAI YONGQUAN , BURMEISTER ERIC , GARRETT NATE
IPC分类号： B01D50/00
CPC分类号： F01N3/2066 , F01N3/32 , F01N2610/03 , F01N2610/08 , F01N2610/085 , F01N2610/1453 , Y02A50/2325 , Y02T10/24 , Y10T137/0318 , Y10T137/85978 , Y10T137/87571
摘要： A system includes a cylindrical blend chamber having two inlets and one outlet. The outlet is fluidly coupled to a transfer line, and a nozzle is positioned downstream of the transfer line. The nozzle is fluidly coupled to an exhaust stream of an internal combustion engine. The system further includes a first inlet fluidly coupled to a diesel exhaust fluid (DEF) stream, and a second inlet fluidly coupled to an air stream. The DEF stream and the air stream intersect at a divergent angle.
摘要翻译：系统包括具有两个入口和一个出口的圆柱形混合室。出口流体联接到输送管线，喷嘴定位在输送管线的下游。喷嘴流体联接到内燃机的排气流。该系统还包括流体连接至柴油机排气流体（DEF）流的第一入口和流体连接至气流的第二入口。 DEF流和空气流以发散角相交。

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