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    Selective catalytic reduction device
    23.
    发明授权
    Selective catalytic reduction device 有权

    公开(公告)号：US09850797B2

    公开(公告)日：2017-12-26

    申请号：US14619146

    申请日：2015-02-11

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Rahul Mital ,  Jianwen Li ,  Steven J. Schmieg

    IPC: F01N3/20 ,  B01D53/94 ,  F01N13/00

    CPC classification number: F01N3/2066 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/0097 ,  F01N2610/02 ,  F01N2900/1622 ,  Y02A50/2325 ,  Y02T10/24

    Abstract: A SCR device includes a substrate having a first portion, and a second portion disposed downstream of the first portion. The first portion of the substrate includes a volume that is between 15% and 25% of a total volume of the substrate. A first selective catalytic reduction compound is disposed on the first portion of the substrate, and includes an iron zeolite (Fe-Zeolite) compound. A second selective catalytic reduction compound is disposed on the second portion of the substrate, and includes a copper (Cu) SAPO-34 compound. The copper SAPO-34 compound includes a catalyst density of less than 2.74 mg copper per cubic centimeter of copper SAPO-34 compound. The copper SAPO-34 compound is applied onto the second portion of the substrate at a compound density of less than 110 g of copper SAPO-34 compound per liter of volume of the second portion of the substrate.

    Particulate filter washcoat diagnosis based on exothermic substrate temperature
    26.
    发明授权
    Particulate filter washcoat diagnosis based on exothermic substrate temperature 有权
    基于放热衬底温度的颗粒过滤器修补涂层诊断

    公开(公告)号：US09528422B2

    公开(公告)日：2016-12-27

    申请号：US13960014

    申请日：2013-08-06

    Applicant: GM Global Technology Operations LLC

    Inventor： Jianwen Li ,  Vincent J. Tylutki ,  Rahul Mital

    IPC: G01N25/00 ,  G01K1/00 ,  G01K3/02 ,  G01K3/04 ,  G01K13/02 ,  F01N3/035 ,  F01N11/00 ,  G01K7/42

    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涂层。

    Mixer for short mixing lengths
    27.
    发明授权
    Mixer for short mixing lengths 有权
    混合器短混合长度

    公开(公告)号：US09447717B2

    公开(公告)日：2016-09-20

    申请号：US14540056

    申请日：2014-11-13

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Rahul Mital ,  Anil Yadav ,  Jianwen Li ,  Amit Prabhakar

    IPC: F01N3/00 ,  F01N1/00 ,  F01N3/10 ,  F01N3/28 ,  F01N3/20 ,  F01N3/021 ,  F01N13/00

    CPC classification number: F01N3/2892 ,  B01F3/04049 ,  B01F5/0473 ,  B01F5/0619 ,  B01F2005/0639 ,  F01N3/021 ,  F01N3/2066 ,  F01N13/0097 ,  F01N2240/20 ,  F01N2610/02 ,  Y02A50/2325 ,  Y02T10/24

    Abstract: A mixer for an exhaust gas treatment system includes a support body that defines a mixing chamber. A plurality of first blades is arranged in a row, and is disposed along a transverse axis. Each of the first blades extends from an upstream edge, toward a first lateral edge surface of the mixing chamber, to a downstream edge, at a first row angle relative to the transverse axis. A plurality of second blades is arranged in a row, and is disposed along the transverse axis. Each of the second blades extends from an upstream edge, toward a second lateral edge surface of the mixing chamber, to a downstream edge, at a second row angle relative to the transverse axis. The first row angle is less than the second row angle. The row of the first blades is axially spaced from the row of the second blades.

    Abstract translation: 用于废气处理系统的混合器包括限定混合室的支撑体。 多个第一叶片被排列成一排，并沿着横轴设置。 每个第一叶片从混合室的上游边缘朝向第一侧边缘表面延伸到相对于横向轴线以第一行角度的下游边缘。 多个第二叶片被排列成一排，并且沿横轴设置。 每个第二叶片从混合室的上游边缘朝向第二侧边缘表面延伸到相对于横向轴线的第二行角度的下游边缘。 第一行角度小于第二行角度。 第一叶片的一排与第二叶片的一排轴向间隔开。

    MIXER FOR SHORT MIXING LENGTHS
    28.
    发明申请
    MIXER FOR SHORT MIXING LENGTHS 有权
    混合器混合长度

    公开(公告)号：US20160053660A1

    公开(公告)日：2016-02-25

    申请号：US14540056

    申请日：2014-11-13

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Rahul Mital ,  Anil Yadav ,  Jianwen Li ,  Amit Prabhakar

    IPC: F01N13/08

    CPC classification number: F01N3/2892 ,  B01F3/04049 ,  B01F5/0473 ,  B01F5/0619 ,  B01F2005/0639 ,  F01N3/021 ,  F01N3/2066 ,  F01N13/0097 ,  F01N2240/20 ,  F01N2610/02 ,  Y02A50/2325 ,  Y02T10/24

    Abstract: A mixer for an exhaust gas treatment system includes a support body that defines a mixing chamber. A plurality of first blades is arranged in a row, and is disposed along a transverse axis. Each of the first blades extends from an upstream edge, toward a first lateral edge surface of the mixing chamber, to a downstream edge, at a first row angle relative to the transverse axis. A plurality of second blades is arranged in a row, and is disposed along the transverse axis. Each of the second blades extends from an upstream edge, toward a second lateral edge surface of the mixing chamber, to a downstream edge, at a second row angle relative to the transverse axis. The first row angle is less than the second row angle. The row of the first blades is axially spaced from the row of the second blades.

    Abstract translation: 用于废气处理系统的混合器包括限定混合室的支撑体。 多个第一叶片被排列成一排，并沿着横轴设置。 每个第一叶片从混合室的上游边缘朝向第一侧边缘表面延伸到相对于横向轴线以第一行角度的下游边缘。 多个第二叶片被排列成一排，并且沿横轴设置。 每个第二叶片从混合室的上游边缘朝向第二侧边缘表面延伸到相对于横向轴线的第二行角度的下游边缘。 第一行角度小于第二行角度。 第一叶片的一排与第二叶片的一排轴向间隔开。

    METHODS FOR OPERATING AND DIAGNOSING INTERNAL COMBUSTION ENGINE EXHAUST GAS TREATMENT SYSTEMS
    29.
    发明申请
    METHODS FOR OPERATING AND DIAGNOSING INTERNAL COMBUSTION ENGINE EXHAUST GAS TREATMENT SYSTEMS 审中-公开

    公开(公告)号：US20200173327A1

    公开(公告)日：2020-06-04

    申请号：US16206021

    申请日：2018-11-30

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Shouxian Ren ,  Gongshin Qi ,  Rahul Mital ,  Anirban Sett

    IPC: F01N3/20 ,  F01N3/10 ,  F02D41/02 ,  B01D53/94

    Abstract: Internal combustion engine (ICE) exhaust gas treatment systems include the ICE having one or more cylinders configured to receive a mixture of air and fuel defined by an air to fuel ratio (AFR) for combustion therein, a control module configured to control the AFR, a diesel oxidation catalyst (DOC) configured to receive exhaust gas generated by the ICE and oxidize NOx species within the exhaust gas, and a selective catalytic reduction device (SCR) configured to receive exhaust gas from the DOC. Methods for operating and diagnosing such systems include determining, via the control module, a baseline value of a SCR performance parameter which is unsuitable, changing, via the control module, the AFR to change the DOC outlet NO2:NOx ratio, subsequently assessing a second value of the SCR performance parameter, and implementing a control action based on the second value of the SCR performance parameter.

    METHODS FOR MONITORING AND REGENERATING SELECTIVE CATALYTIC REDUCTION FILTER DEVICES
    30.
    发明申请
    METHODS FOR MONITORING AND REGENERATING SELECTIVE CATALYTIC REDUCTION FILTER DEVICES 审中-公开

    公开(公告)号：US20190040783A1

    公开(公告)日：2019-02-07

    申请号：US15670043

    申请日：2017-08-07

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jianwen Li ,  Rahul Mital

    IPC: F01N9/00 ,  F01N3/20 ,  F01N3/035

    Abstract: Methods for monitoring and/or regenerating a selective catalytic reduction particulate filter (SCRF) are provided. The SCRF comprises a porous filter substrate and a catalytic composition capable of reducing NOx applied thereto. Methods include determining a SCRF pressure differential (dP) and determining the SCRF soot loading using a 1st SCRF dP map if the SCRF has not been degreened, or a 2nd SCRF dP map if the SCRF has been degreened. The SCRF has been degreened if one or more of a degreening cumulative time and temperature threshold has been achieved and a filter regeneration count threshold has been achieved. The 1st and 2nd SCRF dP maps correlate SCRF dP and one or more of SCRF temperature, exhaust mass flow, and exhaust volumetric flow to a SCRF soot loading. The method can optionally further include initiating a filter regeneration if the determined SCRF soot loading is above a soot loading threshold.

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