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    Methods for determining oxidation performance of oxidation catalyst devices
    1.
    发明授权
    Methods for determining oxidation performance of oxidation catalyst devices 有权

    公开(公告)号：US10365258B2

    公开(公告)日：2019-07-30

    申请号：US15675019

    申请日：2017-08-11

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Michael A. Smith ,  Christopher L. Whitt ,  Yong Miao

    IPC: G01N33/00 ,  F01N11/00 ,  F01N3/10

    Abstract: A method for determining the hydrocarbon (HC) oxidation performance of an oxidation catalyst device (OC) includes communicating gas to the OC inlet over a time frame, measuring the NOx content of the OC outlet gas using a NOx sensor over the time frame, wherein the temperature of the OC increases over the time frame, and correlating an increased NOx measurement over the time frame to an increased OC HC oxidation performance. The NOx sensor can be operated in a low temperature mode during the time frame. The method can further include determining the temperature of the OC over the time frame and correlating the HC oxidation performance to the OC temperature, and/or correlating a maximum NOx concentration measured during the time frame to the OC temperature measured at the same time. HC slip through the OC can be identified when the measured NOx content of the OC outlet gas decreases.

    Method and system for non-uniform catalyst heating for internal combustion engine
    2.
    发明授权
    Method and system for non-uniform catalyst heating for internal combustion engine 有权

    公开(公告)号：US10161276B2

    公开(公告)日：2018-12-25

    申请号：US15186836

    申请日：2016-06-20

    Applicant: GM Global Technology Operations LLC

    Inventor： Yong Miao ,  Steven Felix ,  Kurt Alfred Wellenkotter

    IPC: F01N3/20 ,  F01N11/00 ,  F02D41/02 ,  F01N9/00

    Abstract: A method and system for non-uniform catalyst heating for reducing exhaust gas emissions when the catalyst is below a predetermined light off temperature is provided. The method includes providing a catalyst formed of a plurality of electrically conductive subsections and at least one catalyst heating device that is operable to heat at least one of the plurality of electrically conductive subsections of the catalyst to form at least one predetermined non-uniform heating pattern. A heater control module is provided for controlling the operation of the at least one catalyst heating device. If the engine is in a cold start condition, then the heater control module causes the at least one catalyst heating device to heat at least one of the electrically conductive subsections of the catalyst to obtain a first predetermined non-uniform heating pattern.

    EXHAUST AFTERTREATEMENT SYSTEM INJECTOR AND CONTROL
    5.
    发明申请
    EXHAUST AFTERTREATEMENT SYSTEM INJECTOR AND CONTROL 审中-公开
    排气后处理系统注射器和控制

    公开(公告)号：US20150345354A1

    公开(公告)日：2015-12-03

    申请号：US14294571

    申请日：2014-06-03

    Applicant: GM Global Technology Operations LLC

    Inventor： Yong Miao

    IPC: F01N3/20 ,  F01N11/00 ,  F01N3/28

    CPC classification number: F01N3/208 ,  F01N3/2066 ,  F01N3/2896 ,  F01N11/00 ,  F01N2610/02 ,  F01N2610/03 ,  F01N2610/1453 ,  F01N2900/1411 ,  Y02T10/24

    Abstract: In one aspect, an injector assembly for injecting a fluid into an exhaust aftertreatment system is provided. The injector assembly includes a housing having an outlet orifice and an inner wall defining a passageway, the passageway fluidly coupled to the outlet orifice and configured to supply the fluid to the outlet orifice, and a valve having a longitudinal axis. The valve is oriented within the passageway and configured to translate along the longitudinal axis between a first position and a second position. A downstream end of the valve includes a tapered wall oriented at a first angle with respect to the longitudinal axis, and the housing inner wall is oriented at a second angle with respect to the longitudinal axis.

    Abstract translation: 在一个方面，提供了一种用于将流体喷射到排气后处理系统中的喷射器组件。 喷射器组件包括具有出口孔和限定通道的内壁的壳体，该通道流体地联接到出口孔并且被配置成将流体供应到出口孔，以及具有纵向轴线的阀。 所述阀定向在所述通道内并且构造成沿着所述纵向轴线在第一位置和第二位置之间平移。 阀的下游端包括相对于纵向轴线以第一角度定向的锥形壁，并且壳体内壁相对于纵向轴线以第二角度定向。

    Method to power multiple electric heaters with a single power source
    7.
    发明授权
    Method to power multiple electric heaters with a single power source 有权

    公开(公告)号：US10408103B1

    公开(公告)日：2019-09-10

    申请号：US15972572

    申请日：2018-05-07

    Applicant: GM Global Technology Operations LLC

    Inventor： Yong Miao ,  Stefano Pellegrino

    IPC: F01N3/10 ,  F01N3/20 ,  F01N13/00 ,  B01D53/94

    Abstract: A engine exhaust system includes a diesel oxidation catalyst (DOC) configured to receive the engine exhaust gases, a first electric heater coupled to the DOC, and a selective catalytic reduction (SCR) device in fluid communication with the DOC. The engine exhaust system further includes a second electric heater coupled to the DOC, a power switch controller in electronic communication with the first electric heater and the second electric heater, and a single power source electrically coupled to the power switch controller, the first electric heater, and the second electric heater. The power switch controller includes a switch to control a power distribution between the first electric heater and the second electric heater as a function of time.

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