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1.发明授权公开(公告)号：US10927733B2
公开(公告)日：2021-02-23
申请号：US16433652
申请日：2019-06-06
Applicant: GM Global Technology Operations LLC
Inventor： Rahul Mital , Daryl J. D'Andrea , Bilal A. Rathur
Abstract: A system to mitigate diesel exhaust fluid deposits in vehicle exhaust system flexible couplings includes a diesel exhaust pipeline. A diesel exhaust fluid injector is connected to the diesel exhaust pipeline to inject a diesel exhaust fluid into the diesel exhaust pipeline. A flexible coupling is connected to the diesel exhaust pipeline. A diesel exhaust fluid collection device is positioned in the diesel exhaust pipeline between a connection location into the diesel exhaust pipeline of the diesel exhaust fluid injector and the flexible coupling. The diesel exhaust fluid collection device includes a liquid diesel exhaust fluid collection volume where an un-vaporized portion of the diesel exhaust fluid is collected.
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公开(公告)号：US10138789B1
公开(公告)日：2018-11-27
申请号：US15652703
申请日：2017-07-18
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Prashant Kumar Mishra , Asif Iqbal Siddiqui , Anil Yadav , Rahul Mital
Abstract: An exhaust gas treatment system includes a selective catalytic reduction device (SCR); a reductant injector upstream from the SCR and configured to communicate reductant into the SCR via a conduit defined by an outer periphery, a first mixer disposed within the conduit upstream from the reductant injector, and a second mixer disposed within the conduit downstream from the reductant injector and upstream from the SCR. Each of the first mixer and the second mixer comprises a plurality of blades extending between a center region of the conduit to the conduit periphery, wherein each of the blades at least partially obstructs fluid flow through the conduit and are angled relative to a cross sectional plane of the conduit such that fluid flow is permitted between adjacent blades, and the plurality of blades form a turbulence plane defined by a plane angle measured from the two outermost blades of the turbulence plane.
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公开(公告)号：US10040029B2
公开(公告)日：2018-08-07
申请号：US14189398
申请日：2014-02-25
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Rahul Mital , Jianwen Li , Andrea De Filippo , Chang H Kim , Shouxian Ren
IPC: F01N3/00 , F01N3/10 , F01N3/02 , B01D53/94 , F01N3/08 , F01N3/20 , F01N9/00 , F01N3/021 , F01N3/035 , F01N13/00
Abstract: A method is disclosed of providing a fuel efficient regeneration of an exhaust after-treatment (AT) system that includes a lean oxides of nitrogen (NOX) trap (LNT) and a selective catalytic reduction filter (SCRF) positioned downstream of the LNT. The method includes regulating a selectable position valve. The valve permits a first gas flow portion to pass through the LNT and diverts a remaining second portion of exhaust gas flow from a first passage connecting an engine and the AT system to a second exhaust passage to thereby bypass the LNT. The method also includes regulating a first device to inject fuel into the first portion of the exhaust gas flow. The injection of fuel in to the first portion of the exhaust gas flow provides fuel efficient regeneration of the LNT and promotes NOX conversion and ammonia (NH3) formation in the LNT. A system employing the method is also disclosed.
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公开(公告)号：US09879587B2
公开(公告)日：2018-01-30
申请号：US14921722
申请日：2015-10-23
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chang H. Kim , Michelle H. Wiebenga , Vincent J. Tylutki , David B. Brown , Igor Anilovich , Rahul Mital
CPC classification number: F01N11/002 , F01N3/103 , F01N2370/04 , F01N2560/06 , F01N2560/14 , F01N2900/1404 , F01N2900/1622 , F01N2900/1626 , Y02T10/47
Abstract: A method for diagnosing an Oxidation Catalyst (OC) device of an exhaust gas treatment system is provided. The method monitors a differential temperature across the OC device. The method determines whether the differential temperature reveals a temperature spike. The method determines that the OC device operates properly in response to determining that the differential temperature reveals a temperature spike.
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公开(公告)号：US09856774B2
公开(公告)日：2018-01-02
申请号：US15144871
申请日：2016-05-03
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Luciano Nunziato Di Perna , Raffaello Ardanese , Michael J. Paratore, Jr. , Rahul Mital , Jianwen Li
IPC: F01N3/00 , F01N3/10 , F01N3/02 , F01N1/00 , F01N13/00 , F01N3/20 , F01N3/027 , F01N3/035 , F01N3/28 , B01D53/94
CPC classification number: F01N13/0093 , B01D53/9431 , B01D53/9477 , B01D2251/2067 , B01D2255/904 , B01D2258/012 , F01N3/027 , F01N3/035 , F01N3/101 , F01N3/103 , F01N3/2066 , F01N3/2892 , F01N9/00 , F01N13/0097 , F01N2240/16 , F01N2240/20 , F01N2330/02 , F01N2370/02 , F01N2490/20 , F01N2610/02 , F01N2610/1453
Abstract: An engine exhaust system includes an exhaust pipe assembly having an engine exhaust system inlet configured to receive engine exhaust and an engine exhaust system outlet. The system includes a first selective catalytic reduction (SCR) catalyst device positioned downstream in exhaust flow from the engine exhaust system inlet. The first SCR catalyst device includes a substrate with a metallic catalyst coated on the substrate. An electric heater is configured to heat the metallic catalyst. A second SCR catalyst device is positioned downstream in engine exhaust flow from the first SCR catalyst device and upstream of the engine exhaust system outlet. The first SCR catalyst device and the exhaust pipe assembly define an empty chamber between the substrate and the second SCR catalyst device. Engine exhaust flows directly from the substrate to the second SCR catalyst device through the empty chamber.
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Patent Agency Ranking
公开(公告)号：US09821282B2
公开(公告)日：2017-11-21
申请号：US14560466
申请日：2014-12-04
Applicant: GM Global Technology Operations LLC
Inventor： Jianwen Li , Chijou Wang , Rahul Mital , Luciano Nunziato Di Perna , James B. Rodgers
CPC classification number: B01F5/0602 , B01F3/04007 , B01F3/04049 , B01F5/0268 , B01F5/0473 , B01F5/0647 , F01N3/103 , F01N3/206 , F01N3/2066 , F01N3/2892 , F01N13/009 , F01N13/0097 , F01N2240/20 , F01N2610/02 , F01N2610/1453 , Y02T10/24
Abstract: An exhaust system for a diesel engine, includes an exhaust passage adapted to be attached to the diesel engine. A diesel oxidation catalyst is provided in the exhaust passage along with a selective catalyst reduction device disposed downstream from the diesel oxidation catalyst. A diesel exhaust fluid mixing system includes a diesel exhaust fluid injection nozzle and a mixing device defining a single inlet opening and a single outlet opening connected to one another by a partial spiral flow passage. The diesel exhaust fluid injection nozzle injects diesel exhaust fluid directly into the inlet opening of the partial spiral flow passage.
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公开(公告)号：US09689290B2
公开(公告)日：2017-06-27
申请号：US14955629
申请日：2015-12-01
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Jianwen Li , Luciano Nunziato Di Perna , Rahul Mital , Roberto Argolini , Joshua Clifford Bedford
CPC classification number: F01N3/0231 , B01F3/04049 , B01F5/0451 , B01F5/0614 , B01F5/0618 , B01F2005/0637 , F01N1/08 , F01N1/083 , F01N1/086 , F01N3/021 , F01N3/035 , F01N3/0814 , F01N3/0842 , F01N3/103 , F01N3/206 , F01N3/2066 , F01N3/2892 , F01N13/009 , F01N2240/20 , F01N2340/06 , F01N2610/02 , Y02A50/2325 , Y02T10/24
Abstract: An after-treatment (AT) system for a flow of exhaust gas of an internal combustion engine includes a first AT device and a second AT device in fluid communication with and positioned in the exhaust gas flow downstream of the first AT device. The AT system also includes an exhaust passage configured to carry the exhaust gas flow from the first AT device to the second AT device. The AT system additionally includes an injector configured to introduce a reductant into the exhaust passage. The second AT device includes an inlet cone having a volute defining a spiral primary path for the exhaust gas flow into the second AT device and configured to generate a swirling motion of and turbulence in the exhaust gas flow. A vehicle employing the AT system is also disclosed.
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8.发明授权System and method for enhancing the performance of a selective catalytic reduction device 有权用于提高选择性催化还原装置的性能的系统和方法公开(公告)号：US09140170B2
公开(公告)日：2015-09-22
申请号：US14010604
申请日：2013-08-27
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Rahul Mital , Jianwen Li , Justin Adam Shetney , Chang H. Kim , Matthew J. Myers
CPC classification number: F01N11/002 , F01N3/021 , F01N3/208 , F01N9/00 , F01N9/002 , F01N2610/02 , F01N2610/1493 , F01N2900/102 , F01N2900/1411 , F01N2900/1602 , F01N2900/1606 , F01N2900/1812 , Y02A50/2325 , Y02T10/24 , Y02T10/47
Abstract: A system and method is provided for enhancing the performance of an SCR device, particularly by routinely reducing the amount of reductant deposits accumulated in an exhaust gas system, when the reductant is injected at a reduced temperature. The system may include an engine, an exhaust gas system, an SCR device, an injection device, and a controller configured to execute the present method. The controller may be configured to select an initial injection rate and an initial injection temperature for the reductant; estimate the amount of accumulated reductant deposits present within the exhaust gas system; compare the amount of accumulated reductant deposits to a threshold amount of reductant deposits allowable in the exhaust gas system; and initiate a reductant deposit burn-off mode when the amount of accumulated reductant deposits is greater than the threshold amount of reductant deposits allowable in the exhaust gas system.
Abstract translation: 提供一种用于提高SCR装置的性能的系统和方法，特别是当还原剂在降低的温度下注入时，常规地减少积聚在排气系统中的还原剂沉积物的量。 该系统可以包括发动机，排气系统，SCR装置，注射装置和被配置为执行本方法的控制器。 所述控制器可以被配置为选择所述还原剂的初始注入速率和初始注入温度; 估计排气系统中存在的累积还原剂沉积物的量; 将累积的还原剂沉积物的量与排气系统中允许的还原剂沉积量进行比较; 并且当累积的还原剂沉积物的量大于排气系统中允许的还原剂沉积物的阈值量时，引发还原剂沉积燃烧模式。
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9.发明申请SYSTEM AND METHOD FOR ENHANCING THE PERFORMANCE OF A SELECTIVE CATALYTIC REDUCTION DEVICE 有权用于增强选择性催化还原装置的性能的系统和方法公开(公告)号：US20150059317A1
公开(公告)日：2015-03-05
申请号：US14010604
申请日：2013-08-27
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Rahul Mital , Jianwen Li , Justin Adam Shetney , Chang H. Kim , Matthew J. Myers
IPC: F01N11/00
CPC classification number: F01N11/002 , F01N3/021 , F01N3/208 , F01N9/00 , F01N9/002 , F01N2610/02 , F01N2610/1493 , F01N2900/102 , F01N2900/1411 , F01N2900/1602 , F01N2900/1606 , F01N2900/1812 , Y02A50/2325 , Y02T10/24 , Y02T10/47
Abstract: A system and method is provided for enhancing the performance of an SCR device, particularly by routinely reducing the amount of reductant deposits accumulated in an exhaust gas system, when the reductant is injected at a reduced temperature. The system may include an engine, an exhaust gas system, an SCR device, an injection device, and a controller configured to execute the present method. The controller may be configured to select an initial injection rate and an initial injection temperature for the reductant; estimate the amount of accumulated reductant deposits present within the exhaust gas system; compare the amount of accumulated reductant deposits to a threshold amount of reductant deposits allowable in the exhaust gas system; and initiate a reductant deposit burn-off mode when the amount of accumulated reductant deposits is greater than the threshold amount of reductant deposits allowable in the exhaust gas system.
Abstract translation: 提供一种用于提高SCR装置的性能的系统和方法，特别是当还原剂在降低的温度下注入时，常规地减少积聚在排气系统中的还原剂沉积物的量。 该系统可以包括发动机，排气系统，SCR装置，注射装置和被配置为执行本方法的控制器。 所述控制器可以被配置为选择所述还原剂的初始注入速率和初始注入温度; 估计排气系统中存在的累积还原剂沉积物的量; 将累积的还原剂沉积物的量与排气系统中允许的还原剂沉积量进行比较; 并且当累积的还原剂沉积物的量大于排气系统中允许的还原剂沉积物的阈值量时，引发还原剂沉积燃烧模式。
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10.发明申请PARTICULATE FILTER WASHCOAT DIAGNOSIS BASED ON EXOTHERMIC SUBSTRATE TEMPERATURE 有权基于过热基板温度的颗粒过滤器洗碗机诊断公开(公告)号：US20150043611A1
公开(公告)日：2015-02-12
申请号：US13960014
申请日：2013-08-06
Applicant: GM Global Technology Operations LLC
Inventor： Jianwen Li , Vincent J. Tylutki , Rahul Mital
CPC classification number: F01N11/002 , F01N2550/02 , F01N2560/06 , F01N2560/14 , F01N2900/0418 , G01K3/04 , G01K7/427 , G01K2013/024 , G01K2205/04 , Y02T10/47
Abstract: An exhaust gas treatment system to treat exhaust gas includes a particulate filter, a second temperature sensor and a control module. The particulate filter includes a PF substrate configured to trap particulate matter contained in the exhaust gas. The second temperature sensor is configured to output an outlet temperature signal indicating an outlet temperature at the outlet of the particulate filter. The control module is in electrical communication with the second temperature sensor to receive the outlet temperature signal. The control module determines a maximum substrate temperature of the PF substrate based on the outlet temperature. The control module is further configured to determine whether the particulate filter includes an active washcoat disposed thereon based on the maximum substrate temperature.
Abstract translation: 用于处理废气的废气处理系统包括微粒过滤器，第二温度传感器和控制模块。 微粒过滤器包括构造成捕集废气中所含的颗粒物质的PF基板。 第二温度传感器被配置为输出表示微粒过滤器出口处的出口温度的出口温度信号。 控制模块与第二温度传感器电连通以接收出口温度信号。 控制模块基于出口温度确定PF基板的最大衬底温度。 控制模块还被配置为基于最大衬底温度来确定颗粒过滤器是否包括其上设置的活性修补基面涂层。
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