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    Method and apparatus for monitoring a particulate filter
    4.
    发明授权
    Method and apparatus for monitoring a particulate filter 有权

    公开(公告)号：US10273857B2

    公开(公告)日：2019-04-30

    申请号：US15407292

    申请日：2017-01-17

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Andrea Pannuzzo ,  Andrea Dutto ,  Adele De Domenico

    IPC: F01N9/00 ,  F01N11/00 ,  F01N3/023

    Abstract: A method for monitoring particulate filter disposed in an exhaust aftertreatment system of an internal combustion engine includes determining, via a differential pressure sensor, a pressure differential across the particulate filter, and determining an initial parameter associated with soot loading on the particulate filter based upon the pressure differential. A first adjustment to the soot loading is determined based upon a passive regeneration effect, a second adjustment to the soot loading is determined based upon an off-engine temperature effect, and a third adjustment to the soot loading is determined based upon occurrence of an interrupted regeneration event. A final parameter associated with soot loading on the particulate filter is determined based upon the initial parameter and the first, second and third adjustments.

    Systems and methods for controlling bypass of exhaust after treatment device
    5.
    发明授权
    Systems and methods for controlling bypass of exhaust after treatment device 有权

    公开(公告)号：US10273847B2

    公开(公告)日：2019-04-30

    申请号：US15606083

    申请日：2017-05-26

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Andrea Pannuzzo ,  Luca Gatti

    IPC: F01N9/00 ,  F01N3/20 ,  F01N3/021 ,  F01N3/031

    Abstract: A method for controlling a valve for directing an exhaust gas stream through an exhaust duct having an after treatment device and a bypass duct in an exhaust system of a vehicle is provided. The method includes receiving first sensor signals from a first sensor coupled downstream from the exhaust after treatment device, and processing the first sensor signals to determine a first temperature of an outlet exhaust gas stream. The method includes determining a bypass command based on whether the first temperature exceeds a first pre-defined threshold for the outlet exhaust gas stream. The method also includes outputting a control signal based on the determining of the bypass command to a valve coupled to the bypass duct and the exhaust pipe upstream of the after treatment device to move the valve between a first state and a second state.

    AFTERTREATMENT SYSTEM WITH LEAN NOx TRAP FILTER
    9.
    发明申请
    AFTERTREATMENT SYSTEM WITH LEAN NOx TRAP FILTER 审中-公开

    公开(公告)号：US20190383183A1

    公开(公告)日：2019-12-19

    申请号：US16012355

    申请日：2018-06-19

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Andrea Pannuzzo ,  Isadora Ricci ,  Emilie Reynier

    IPC: F01N3/08 ,  F01N3/035 ,  F01N3/36 ,  F01N13/00 ,  F01N3/20

    Abstract: An aftertreatment system includes a first pipe section in fluid communication with an exhaust manifold on an internal combustion engine. A first aftertreatment device includes a housing and a porous substrate having substrate walls defining a plurality of flow channels including first channels obstructed at a first end of the substrate and second channels obstructed at a second end of the substrate opposite the first end. The first and second channels are interleaved and internal pore surfaces in the porous substrate form a plurality of internal pores. A passive NOx adsorption catalyst is deposited on the substrate walls and internal pore surfaces such that the mean porosity of the porous substrate is not greater than a particulate matter secondary grain size. A second aftertreatment device having an inlet is in fluid communication with the outlet of the first aftertreatment device.

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