公开(公告)号：US20140165537A1

公开(公告)日：2014-06-19

申请号：US13716639

申请日：2012-12-17

申请人： James J. Daley ,  Robert J. Jerger ,  Wei-Jun Yang ,  Jeffrey P. Wuttke ,  Michael G. Zammit ,  Andrew Brocker

发明人： James J. Daley ,  Robert J. Jerger ,  Wei-Jun Yang ,  Jeffrey P. Wuttke ,  Michael G. Zammit ,  Andrew Brocker

IPC分类号： F01N11/00

CPC分类号： F01N11/007 ,  F01N9/007 ,  F01N11/00 ,  F01N2550/02 ,  F01N2560/025 ,  F01N2900/1624 ,  Y02T10/47

摘要： A catalyst degradation detection method for use with a zero ceria catalyst. The method uses techniques to measure transient responses to engine control events of upstream and downstream sensors to determine catalyst degradation and performance. By measuring transient behavior, the method can determine catalyst degradation and performance based on the limited oxygen storage of precious metal catalysts that do not include added ceria or other materials with high oxygen capture rates.

摘要翻译： 一种与零二氧化铈催化剂一起使用的催化剂降解检测方法。 该方法使用技术来测量对上游和下游传感器的发动机控制事件的瞬态响应，以确定催化剂的劣化和性能。 通过测量瞬态行为，该方法可以基于贵金属催化剂的有限氧储存来确定催化剂降解和性能，所述催化剂不包括添加的二氧化铈或具有高氧捕获速率的其它材料。

公开(公告)号：US20160169784A1

公开(公告)日：2016-06-16

申请号：US14567632

申请日：2014-12-11

申请人： Michael A. Smith ,  Kiran Premchand ,  Homayoun Ahari ,  Jeffrey P. Wuttke ,  Brett Schubring ,  Craig L. Dimaggio ,  Michael G. Zammit ,  Michael T. Vincent

发明人： Michael A. Smith ,  Kiran Premchand ,  Homayoun Ahari ,  Jeffrey P. Wuttke ,  Brett Schubring ,  Craig L. Dimaggio ,  Michael G. Zammit ,  Michael T. Vincent

IPC分类号： G01N15/06 ,  G01N33/00 ,  G01M15/10 ,  F01N9/00

CPC分类号： G01N33/004 ,  F01N9/002 ,  F02B3/06 ,  G01M15/106 ,  G01N1/2205 ,  G01N1/24 ,  G01N1/38 ,  G01N15/0656 ,  G01N33/0037 ,  Y02A50/245 ,  Y02A50/25

摘要： A diagnostic system and method for diagnosing the performance of a particulate matter (PM) filter of an exhaust system each involve receiving, by a controller from at least one sensor, a gas component measurement of exhaust gas flowing through the exhaust system and the PM filter. The controller calculates a conversion efficiency of the gas component by the PM filter and compares the calculated conversion efficiency to a predetermined conversion efficiency threshold indicative of an expected conversion efficiency of a flow-through catalyst. The controller then determines whether the PM filter is cracked or damaged based on the comparison between the calculated conversion efficiency and the predetermined conversion efficiency threshold.

摘要翻译： 用于诊断排气系统的颗粒物质（PM）过滤器的性能的诊断系统和方法各自包括由控制器从至少一个传感器接收流过排气系统和PM过滤器的废气的气体成分测量 。 控制器通过PM滤波器计算气体成分的转换效率，将计算出的转换效率与表示流通催化剂的预期转换效率的规定转换效率阈值进行比较。 然后，控制器基于计算的转换效率与预定的转换效率阈值之间的比较来确定PM滤波器是否破裂或损坏。

公开(公告)号：US20150361842A1

公开(公告)日：2015-12-17

申请号：US14301707

申请日：2014-06-11

申请人： Homayoun Ahari ,  Michael G. Zammit ,  Luis Cattani

发明人： Homayoun Ahari ,  Michael G. Zammit ,  Luis Cattani

IPC分类号： F01N3/035 ,  F01N3/20

CPC分类号： F01N3/035 ,  B01D53/9472 ,  B01D2251/2067 ,  B01D2255/808 ,  B01D2258/012 ,  F01N3/103 ,  F01N3/2066 ,  F01N13/0097 ,  F01N2240/40 ,  F01N2250/02 ,  F01N2510/0682 ,  F01N2610/02 ,  Y02A50/2325 ,  Y02T10/24

摘要： An exhaust system for a vehicle includes a passageway, a selective catalytic reduction system, a diesel particulate filter, a urea injection system, and a hydrolysis catalyst. The passageway is operable to direct a flow of exhaust gas emitted from an engine of the vehicle. The selective catalytic reduction system and the diesel particulate filter are positioned along the passageway spaced from one another. The urea injection system includes an injection port positioned along the passageway upstream of the selective catalytic reduction system. The urea injection system is operable to inject urea into the passageway. The hydrolysis catalyst coats at least a portion of the diesel particulate filter. Urea injected into the passageway through the injection port decomposes into ammonia and carbon dioxide upon contact with the hydrolysis catalyst. Thus, the decomposition of the urea is not dependent on mixing the urea with the exhaust gases.

摘要翻译： 用于车辆的排气系统包括通道，选择性催化还原系统，柴油微粒过滤器，尿素喷射系统和水解催化剂。 通道可操作以引导从车辆的发动机排出的废气流。 选择性催化还原系统和柴油颗粒过滤器沿着彼此间隔开的通道定位。 尿素喷射系统包括沿着选择性催化还原系统上游的通道定位的注射口。 尿素注射系统可操作以将尿素注入通道。 水解催化剂涂覆至少一部分柴油颗粒过滤器。 通过注入口注入通道的尿素在与水解催化剂接触时分解成氨和二氧化碳。 因此，尿素的分解不依赖于将尿素与废气混合。