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    TIMING DRIVE TENSIONER ASSEMBLY WITH PRE-LOAD AND METHOD
    1.
    发明申请
    TIMING DRIVE TENSIONER ASSEMBLY WITH PRE-LOAD AND METHOD 审中-公开

    公开(公告)号：US20190048764A1

    公开(公告)日：2019-02-14

    申请号：US15673731

    申请日：2017-08-10

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Robert Gallon ,  David E. Mann ,  Charles L. Nicholson

    IPC: F01L1/348 ,  F01L1/047 ,  F01L1/02

    Abstract: A tensioner assembly for an engine timing drive includes a tensioner with a tensioner body having a fastener opening and defining a cavity with a plunger opening. A plunger is disposed in the cavity and a removable pin restrains the plunger in the cavity. The plunger is configured to be biased out of the plunger opening when the pin is removed. A protuberance extends outward from the tensioner body and is adapted to receive an applied torque. The tensioner body is configured to pivot about a center axis of the fastener opening in response to a predetermined torque applied to the protuberance. A method of assembling an engine timing drive includes applying a predetermined torque to a protuberance of a tensioner that is pivotably mounted to a cylinder block to rotate the tensioner toward a rotatable device such that the tensioner applies a predetermined load to the rotatable device.

    Deceleration cylinder cut-off (DCCO) methodology with enhanced EGR
    2.
    发明授权
    Deceleration cylinder cut-off (DCCO) methodology with enhanced EGR 有权

    公开(公告)号：US10704504B1

    公开(公告)日：2020-07-07

    申请号：US16385564

    申请日：2019-04-16

    Applicant: GM Global Technology Operations LLC

    Inventor： Michael A. Smith ,  Michael Kaczmar ,  Robert Gallon

    IPC: F02M26/01 ,  F02M26/46 ,  F02D41/12 ,  F02D41/00

    Abstract: A method of operating an engine having an intake manifold, an exhaust manifold, a crankshaft, a plurality of working cylinders each having at least one intake valve and at least one exhaust valve, and an exhaust gas recirculation conduit providing fluid communication between the intake manifold and the exhaust manifold. The method includes: while the engine is operating, in response to a no engine torque request, deactivating a number of the working cylinders such that none of the deactivated working cylinders are fired and no air is pumped through the deactivated working cylinders as the crankshaft rotates, operating at least one of the plurality of working cylinders that is not deactivated to pump air through the non-deactivated working cylinder, and controlling gas flow through the exhaust gas recirculation conduit to circulate air pumped through the non-deactivated working cylinder to the intake manifold.

    System and method for a motor vehicle with reduced fuel enrichment after a fuel cutoff event
    3.
    发明授权
    System and method for a motor vehicle with reduced fuel enrichment after a fuel cutoff event 有权

    公开(公告)号：US11085390B2

    公开(公告)日：2021-08-10

    申请号：US16696134

    申请日：2019-11-26

    Applicant: GM Global Technology Operations LLC

    Inventor： Robert Gallon ,  Michael A. Smith ,  Matt Pedigo

    IPC: F02D41/12 ,  F02D41/14 ,  F02D13/02 ,  F02D9/02

    Abstract: A control system for a fuel cutoff system of a motor vehicle includes a fuel cutoff module that generates a fuel cutoff signal for disabling a supply of fuel to an engine, in response to the fuel cutoff module detecting a deceleration fuel cutoff (DFCO) event. The control system further includes an oxygen storage module determining an amount of oxygen accumulated in a catalyst and comparing this amount to an oxygen storage capacity (OSC) of the catalyst, in response to the fuel cutoff module determining the DFCO event. The control system further includes an intake valve timing module generating a phasing signal to actuate a plurality of cam phasers to reduce a flow rate of oxygen to the catalyst, in response to the fuel cutoff module determining the DFCO event and the oxygen storage module determining that the amount of oxygen stored in the catalyst is less than the OSC.

    SYSTEM AND METHOD FOR A MOTOR VEHICLE WITH REDUCED FUEL ENRICHMENT AFTER A FUEL CUTOFF EVENT
    9.
    发明申请
    SYSTEM AND METHOD FOR A MOTOR VEHICLE WITH REDUCED FUEL ENRICHMENT AFTER A FUEL CUTOFF EVENT 有权

    公开(公告)号：US20210156324A1

    公开(公告)日：2021-05-27

    申请号：US16696134

    申请日：2019-11-26

    Applicant: GM Global Technology Operations LLC

    Inventor： Robert Gallon ,  Michael A. Smith ,  Matt Pedigo

    IPC: F02D41/12 ,  F02D41/14 ,  F02D13/02 ,  F02D9/02

    Abstract: A control system for a fuel cutoff system of a motor vehicle includes a fuel cutoff module that generates a fuel cutoff signal for disabling a supply of fuel to an engine, in response to the fuel cutoff module detecting a deceleration fuel cutoff (DFCO) event. The control system further includes an oxygen storage module determining an amount of oxygen accumulated in a catalyst and comparing this amount to an oxygen storage capacity (OSC) of the catalyst, in response to the fuel cutoff module determining the DFCO event. The control system further includes an intake valve timing module generating a phasing signal to actuate a plurality of cam phasers to reduce a flow rate of oxygen to the catalyst, in response to the fuel cutoff module determining the DFCO event and the oxygen storage module determining that the amount of oxygen stored in the catalyst is less than the OSC.

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