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    Aftertreatment System and Method
    1.
    发明申请
    Aftertreatment System and Method 有权

    公开(公告)号：US20210123366A1

    公开(公告)日：2021-04-29

    申请号：US16665727

    申请日：2019-10-28

    Applicant: Caterpillar Inc.

    Inventor： Wade J. Robel ,  Matthew T. Wolk

    IPC: F01N3/20 ,  F01N3/035 ,  F01N11/00 ,  F01N3/10 ,  F01N3/08

    Abstract: An aftertreatment system for treating exhaust gases from an internal combustion engine includes, in series, a diesel oxidation catalyst (DOC), a diesel particular filter (DPF) downstream the DOC, and a primary selective catalyst reduction (SCR) catalyst downstream the DPF. A supplemental SCR catalyst is disposed upstream the DOC, DPF, and primary SCR catalyst to receive raw exhaust gases from the internal combustion engine. The supplemental SCR catalyst may conduct an SCR reaction on the raw exhaust gases until the supplemental SCR catalyst reaches a reaction temperature, at which time the supplemental SCR catalyst may conduct the SCR reaction.

    Aftertreatment system and method
    3.
    发明授权
    Aftertreatment system and method 有权

    公开(公告)号：US11156143B2

    公开(公告)日：2021-10-26

    申请号：US16665727

    申请日：2019-10-28

    Applicant: Caterpillar Inc.

    Inventor： Wade J. Robel ,  Matthew T. Wolk

    IPC: F01N3/20 ,  F01N3/035 ,  F01N11/00 ,  F01N3/10 ,  F01N3/08

    Abstract: An aftertreatment system for treating exhaust gases from an internal combustion engine includes, in series, a diesel oxidation catalyst (DOC), a diesel particular filter (DPF) downstream the DOC, and a primary selective catalyst reduction (SCR) catalyst downstream the DPF. A supplemental SCR catalyst is disposed upstream the DOC, DPF, and primary SCR catalyst to receive raw exhaust gases from the internal combustion engine. The supplemental SCR catalyst may conduct an SCR reaction on the raw exhaust gases until the supplemental SCR catalyst reaches a reaction temperature, at which time the supplemental SCR catalyst may conduct the SCR reaction.

    Engine and method for exhaust aftertreatment
    4.
    发明授权
    Engine and method for exhaust aftertreatment 有权

    公开(公告)号：US10760513B1

    公开(公告)日：2020-09-01

    申请号：US16389299

    申请日：2019-04-19

    Applicant: Caterpillar Inc.

    Inventor： Spencer Huhn ,  Wade J. Robel ,  Lifeng Wang ,  Dana Coldren ,  Kevin Weiss

    IPC: F02D41/14 ,  F02D19/02 ,  F02M21/02 ,  F01N3/20

    Abstract: A method of increasing parasitic load on an internal combustion engine includes injecting a fuel into a combustion chamber of an active cylinder of the internal combustion engine, combusting the injected fuel in the combustion chamber of the active cylinder, and determining that increasing a temperature of an exhaust aftertreatment device is required. The method includes increasing a parasitic load on the internal combustion engine by deactivating a cylinder, wherein no fuel is injected in the deactivated cylinder for a combustion cycle of the internal combustion engine, and further increasing the parasitic load by pulsing a spill valve member of a spill valve of a fuel injector in the deactivated cylinder between a fully closed position and an at least partially open position.

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