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    PASSIVE NITRIC OXIDE STORAGE CATALYST MANAGEMENT
    1.
    发明申请
    PASSIVE NITRIC OXIDE STORAGE CATALYST MANAGEMENT 审中-公开

    公开(公告)号：US20190390589A1

    公开(公告)日：2019-12-26

    申请号：US16017141

    申请日：2018-06-25

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Christopher L. Whitt ,  Michael A. Smith ,  Shouxian Ren

    IPC: F01N9/00 ,  F01N3/08 ,  F02D41/02 ,  F01N3/20

    Abstract: According to one or more embodiments described herein, an exhaust system for treating exhaust gas from an internal combustion engine in a motor vehicle includes a passive NOx absorber (PNA) device, and a model-based controller that controls an amount of NOx stored by the PNA device. Controlling of the amount of NOx stored includes computing a predicted NOx storage level of the PNA device using a prediction model of the PNA device, and in response to the predicted NOx storage level of the PNA device being greater than a predetermined cold-start threshold, raising a temperature of the exhaust gas by changing an operation of the internal combustion engine.

    Nitrogen oxides storage catalyst and methods of using the same
    2.
    发明授权
    Nitrogen oxides storage catalyst and methods of using the same 有权

    公开(公告)号：US10399037B1

    公开(公告)日：2019-09-03

    申请号：US15958058

    申请日：2018-04-20

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Lei Wang ,  Shouxian Ren ,  Wei Li

    IPC: B01D53/94 ,  B01J29/068 ,  B01J29/80 ,  B01J35/00 ,  B01J35/04 ,  B01J35/08 ,  F01N3/08

    Abstract: A nitrogen oxides (NOx) storage catalyst for treating an exhaust gas flow is provided. The NOX storage catalyst includes a flow-through substrate defining channels for receiving the exhaust gas flow and first and second zones present in the channels. The first zone includes a first NOX storage catalyst coating capable of storing NOX at a first adsorption temperature and releasing NOX at a first desorption temperature. The second zone includes a second NOX storage catalyst coating capable of storing NOX at a second adsorption temperature and releasing NOX at a second desorption temperature. The second desorption temperature is greater than the first desorption temperature. Methods of using the NOX storage catalyst for treating an exhaust gas stream flowing from a vehicle engine during a period following a cold-start of the engine are also provided.

    Compact exhaust gas treatment systems for diesel applications
    5.
    发明授权
    Compact exhaust gas treatment systems for diesel applications 有权
    用于柴油应用的紧凑型废气处理系统

    公开(公告)号：US08778290B1

    公开(公告)日：2014-07-15

    申请号：US13848109

    申请日：2013-03-21

    Applicant: GM Global Technology Operations LLC

    Inventor： Shouxian Ren ,  Rahul Mital ,  James B Rodgers

    IPC: B01D53/94 ,  F01N3/20 ,  F01N3/28

    CPC classification number: B01D53/9477 ,  B01D53/9418 ,  B01D53/944 ,  F01N3/021 ,  F01N3/103 ,  F01N3/2066 ,  F01N13/009 ,  F01N13/0097 ,  F01N2610/02 ,  Y02A50/2341 ,  Y02T10/24

    Abstract: An exhaust gas treatment system includes a SCR device and a DOC converter disposed upstream of the SCR device. A DEF dosing system includes an injector disposed upstream of the DOC converter for injecting ammonia reductant into the flow of exhaust gas upstream of the DOC converter. The DOC converter includes a corrugated metallic substrate having an ammonia-neutral oxidation catalyst compound that is operable to oxidize hydrocarbons and carbon monoxide in the flow of exhaust gas, while not reacting with the ammonia reductant in the flow of exhaust gas. The ammonia-neutral oxidation catalyst compound allows the ammonia reductant in the flow of exhaust gas to pass through the DOC converter, for reaction with a selective catalytic reduction composition in the SCR device.

    Abstract translation: 排气处理系统包括SCR装置和布置在SCR装置上游的DOC转换器。 DEF配量系统包括设置在DOC转换器上游的喷射器，用于将氨还原剂喷射到DOC转换器上游的废气流中。 DOC转换器包括具有氨 - 中性氧化催化剂化合物的波纹金属基材，其可操作以在排气流中不与氨还原剂反应而在废气流中氧化烃和一氧化碳。 氨 - 中性氧化催化剂化合物允许废气流中的氨还原剂通过DOC转化器，以与SCR装置中的选择性催化还原组合物反应。

    Passive nitric oxide storage catalyst management
    7.
    发明授权
    Passive nitric oxide storage catalyst management 有权

    公开(公告)号：US10947885B2

    公开(公告)日：2021-03-16

    申请号：US16017141

    申请日：2018-06-25

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Christopher L. Whitt ,  Michael A. Smith ,  Shouxian Ren

    IPC: F01N9/00 ,  F01N3/08 ,  F02D41/02 ,  F01N3/20

    Abstract: According to one or more embodiments described herein, an exhaust system for treating exhaust gas from an internal combustion engine in a motor vehicle includes a passive NOx absorber (PNA) device, and a model-based controller that controls an amount of NOx stored by the PNA device. Controlling of the amount of NOx stored includes computing a predicted NOx storage level of the PNA device using a prediction model of the PNA device, and in response to the predicted NOx storage level of the PNA device being greater than a predetermined cold-start threshold, raising a temperature of the exhaust gas by changing an operation of the internal combustion engine.

    Capacitor-powered catalyst heater
    8.
    发明授权
    Capacitor-powered catalyst heater 有权

    公开(公告)号：US10161277B2

    公开(公告)日：2018-12-25

    申请号：US15495445

    申请日：2017-04-24

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Scott W. Jorgensen ,  Shouxian Ren

    IPC: F01N3/00 ,  F01N3/20 ,  F01N13/16

    Abstract: An after-treatment (AT) system used to treat an exhaust gas flow emitted by an internal combustion engine includes a catalyst monolith configured to actively remove a pollutant from the exhaust gas flow. The AT system also includes a heating element configured to heat the catalyst monolith. The AT system additionally includes an energy-discharge unit configured to power the heating element. The energy-discharge unit includes an energy-storage device configured to supply electrical energy. The energy-discharge unit also includes a capacitor configured to receive the electrical energy from the energy-storage device and discharge the received electrical energy to power the heating element and thereby heat the catalyst monolith. A vehicle having an internal combustion engine operatively connected to such an AT system is also contemplated.

    Methods for operating and diagnosing internal combustion engine exhaust gas treatment systems
    9.
    发明授权
    Methods for operating and diagnosing internal combustion engine exhaust gas treatment systems 有权

    公开(公告)号：US10907521B2

    公开(公告)日：2021-02-02

    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.

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