公开(公告)号：US20180334939A1

公开(公告)日：2018-11-22

申请号：US15597636

申请日：2017-05-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rahul Mital ,  Charles Solbrig ,  Yong Miao ,  David Brown

IPC: F01N3/20 ,  F01N3/035 ,  F01N3/10 ,  C23F11/00 ,  B01D53/94 ,  B01J35/04

CPC classification number: F01N3/2066 ,  B01D53/9477 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/1026 ,  B01D2255/1028 ,  B01D2255/2027 ,  B01D2255/2042 ,  B01D2255/20707 ,  B01D2255/20723 ,  B01D2255/20738 ,  B01D2255/20746 ,  B01D2255/20761 ,  B01D2255/20769 ,  B01D2255/20776 ,  B01D2255/402 ,  B01D2255/502 ,  B01D2255/504 ,  B01J35/04 ,  C23F11/00 ,  F01N3/035 ,  F01N3/106 ,  F01N3/2013 ,  F01N2530/02 ,  F01N2610/02 ,  F01N2610/10 ,  F01N2610/1453

Abstract: Electric heaters comprising corrosion resistant metals (CRM), and exhaust gas treatment systems incorporating the same, are provided. Exhaust gas treatment systems include selective catalytic reduction devices (SCR) disposed downstream from reductant injectors. Electric heaters can be disposed downstream from reductant injectors, and optionally contiguous with or incorporated with a catalytic composition of the SCR. CRMs resist corrosion to reductant, which includes t ammonia and/or nitrogen-rich substances capable of decomposing into ammonia, such as urea. CRMs include aluminum, chromium, iron, and one or more stabilizers. CRMs can include about 5.0% to about 7.25% aluminum, about 15% to about 25% chromium, up to about 0.30% stabilizers, and a balance comprising iron. Stabilizers can include hafnium, yttrium, and zirconium. Stabilizers can include about 0.001% to about 0.11% yttrium and about 0.001% to about 0.11% Hf.

公开(公告)号：US20170321590A1

公开(公告)日：2017-11-09

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: F01N13/00 ,  B01D53/94 ,  F01N3/035 ,  F01N3/10 ,  F01N3/28 ,  F01N3/20 ,  F01N3/027

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.

公开(公告)号：US09732660B2

公开(公告)日：2017-08-15

申请号：US14955653

申请日：2015-12-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Luciano Nunziato Di Perna ,  Jianwen Li ,  Charles E. Dean ,  Rahul Mital ,  David B. Brown

IPC: F01N3/00 ,  F01N13/00 ,  F01N3/20 ,  F02B9/02

CPC classification number: F01N13/008 ,  F01N3/2006 ,  F01N3/206 ,  F01N3/2066 ,  F01N13/009 ,  F01N2370/02 ,  F01N2560/06 ,  F01N2560/20 ,  F02B9/02 ,  Y02A50/2325 ,  Y02T10/24

Abstract: An integrated sensor-catalyst is disclosed for an after-treatment (AT) system used to filter an exhaust gas flow emitted by an internal combustion engine. The integrated sensor-catalyst includes a sensor element configured to detect a parameter of the exhaust gas flow. The integrated sensor-catalyst also includes a micro-catalyst element configured to filter a pollutant from the exhaust gas flow. Additionally, the integrated sensor-catalyst includes a housing configured to hold the sensor element and the micro-catalyst element and fix the micro-catalyst element relative to the sensor element such that the micro-catalyst element is arranged and maintained in the exhaust gas flow upstream of the sensor element. A vehicle including such an AT system with the integrated sensor-catalyst is also disclosed.

公开(公告)号：US20170152778A1

公开(公告)日：2017-06-01

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

IPC: F01N3/021 ,  F01N3/20

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.

公开(公告)号：US20150308316A1

公开(公告)日：2015-10-29

申请号：US14264894

申请日：2014-04-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jianwen Li ,  James B. Rodgers ,  Yong Miao ,  Rahul Mital ,  Luciano Nunziato Di Perna

IPC: F01N3/20

CPC classification number: F01N3/208 ,  F01N3/021 ,  F01N3/2066 ,  F01N3/2892 ,  F01N13/009 ,  F01N2240/20 ,  F01N2610/02 ,  Y02T10/24

Abstract: In one aspect, a swirl can mixer assembly for mixing a fluid with exhaust gas exhausted from an internal combustion engine is provided. The assembly includes an inlet portion including an injection area configured to receive a fluid injector for dispensing the fluid into the exhaust gas for mixing with the exhaust gas in the mixing assembly to produce an exhaust gas/fluid mixture, an outlet portion, and an extended mixing conduit fluidly coupled between the inlet portion and the outlet portion. The extended mixing conduit is curved about at least a portion of a circumference of the outlet portion to induce a swirl in the exhaust gas/fluid mixture such that the exhaust gas/fluid mixture enters the outlet portion tangentially thereto.

Abstract translation: 一方面，提供了一种用于将流体与从内燃机排出的废气混合的涡流罐混合器组件。 该组件包括入口部分，该入口部分包括喷射区域，其被配置为接收流体喷射器，用于将流体分配到废气中以与混合组件中的废气混合以产生废气/流体混合物，出口部分和延伸 流体地联接在入口部分和出口部分之间的混合导管。 延伸的混合管道围绕出口部分的圆周的至少一部分弯曲，以在废气/流体混合物中引起涡流，使得废气/流体混合物与其切向地进入出口部分。

公开(公告)号：US20150238903A1

公开(公告)日：2015-08-27

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: B01D53/94

CPC classification number: B01D53/9495 ,  B01D53/9409 ,  B01D53/9431 ,  B01D2258/012 ,  F01N3/021 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/2066 ,  F01N9/00 ,  F01N13/009 ,  F01N2410/00 ,  F01N2430/06 ,  F01N2610/02 ,  F01N2610/03 ,  Y02T10/24 ,  Y02T10/47

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.

Abstract translation: 公开了一种提供排气后处理（AT）系统的燃料效率再生的方法，其包括位于LNT下游的氮（NOX）捕集器（LNT）和选择性催化还原过滤器（SCRF）的贫氧化物。 该方法包括调节可选位置阀。 阀允许第一气体流动部分穿过LNT并将剩余的第二部分废气流从连接发动机和AT系统的第一通道转移到第二排气通道，从而绕过LNT。 该方法还包括调节第一装置以将燃料喷射到废气流的第一部分中。 将燃料喷射到废气流的第一部分中提供了LNT的燃料效率再生，并促进了LNT中的NOX转化和氨（NH 3）形成。 还公开了一种采用该方法的系统。