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    AFTERTREATMENT FOR ALCOHOL FUEL SUBSTITUTED DIESEL ENGINES
    1.
    发明申请
    AFTERTREATMENT FOR ALCOHOL FUEL SUBSTITUTED DIESEL ENGINES 有权

    公开(公告)号：US20240384675A1

    公开(公告)日：2024-11-21

    申请号：US18657835

    申请日：2024-05-08

    Applicant: Caterpillar Inc.

    Inventor： Joshua Lynn Ratts ,  Abhay Gupta ,  Arnold Myoungjin Kim ,  Eric Lee Schroeder ,  Kenth I Svensson

    IPC: F01N3/20 ,  B01D53/94 ,  F01N3/10 ,  F01N3/28

    Abstract: An internal combustion engine system is described herein. The system uses an additive added to the exhaust of the internal combustion engine to maintain a range of NO2 to NO within a range that provides for a fast SCR reaction in a selective catalyst reduction unit. The additive and the exhaust enter a diesel oxidation catalyst (DOC), whereby the NO2 undergoes a two-stage process. In the first stage, the NO2 from the exhaust is adsorbed onto the precious metal catalyst of the DOC and an atomic oxygen is removed from the NO2, reducing the NO2 to NO. Because of the higher reactivity of the additive, the additive scavenges a portion of the atomic oxygen from the catalyst. During the second stage of the DOC process, the NO is oxidized over the catalyst to form NO2.

    Emissions module with adjustable sizing
    2.
    发明授权
    Emissions module with adjustable sizing 有权

    公开(公告)号：US11156145B2

    公开(公告)日：2021-10-26

    申请号：US16751748

    申请日：2020-01-24

    Applicant: Caterpillar Inc.

    Inventor： Wesley Gene Benson ,  Andrew M. Denis ,  Joshua Lynn Ratts ,  Jack Albert Merchant

    IPC: F01N3/28 ,  F01N13/10

    Abstract: An emission module for treating exhaust gas including a housing, a first catalyst substrate positioned within the housing and having an inlet end, the first catalyst substrate defining a plurality of flow passages extending longitudinally from the inlet end, and a first restrictor plate positioned at the inlet end of the first catalyst substrate to block exhaust flow through a first portion of the plurality of flow passages while allowing exhaust flow through the remainder of the plurality of flow passages.

    Aftertreatment for alcohol fuel substituted diesel engines
    6.
    发明授权
    Aftertreatment for alcohol fuel substituted diesel engines 有权

    公开(公告)号：US12215616B2

    公开(公告)日：2025-02-04

    申请号：US18657835

    申请日：2024-05-08

    Applicant: Caterpillar Inc.

    Inventor： Joshua Lynn Ratts ,  Abhay Gupta ,  Arnold Myoungjin Kim ,  Eric Lee Schroeder ,  Kenth I Svensson

    IPC: F01N3/20 ,  B01D53/94 ,  F01N3/10 ,  F01N3/28

    Abstract: An internal combustion engine system is described herein. The system uses an additive added to the exhaust of the internal combustion engine to maintain a range of NO2 to NO within a range that provides for a fast SCR reaction in a selective catalyst reduction unit. The additive and the exhaust enter a diesel oxidation catalyst (DOC), whereby the NO2 undergoes a two-stage process. In the first stage, the NO2 from the exhaust is adsorbed onto the precious metal catalyst of the DOC and an atomic oxygen is removed from the NO2, reducing the NO2 to NO. Because of the higher reactivity of the additive, the additive scavenges a portion of the atomic oxygen from the catalyst. During the second stage of the DOC process, the NO is oxidized over the catalyst to form NO2.

    Selective catalytic reduction for hydrogen engines
    7.
    发明授权
    Selective catalytic reduction for hydrogen engines 有权

    公开(公告)号：US12163451B1

    公开(公告)日：2024-12-10

    申请号：US18385380

    申请日：2023-10-30

    Applicant: Caterpillar Inc.

    Inventor： Andrew Joseph Loetz ,  Joshua Lynn Ratts ,  Eric Lee Schroeder ,  Joel Hiltner

    IPC: F01N3/02 ,  F01N3/20

    Abstract: A combined heat and power system for generating power using a hydrogen internal combustion engine and producing usable heat from the exhaust gases of the hydrogen internal combustion engine is described. The system includes a heat exchanger and reduction device, such as a catalytic converter. The heat exchanger may extract heat from the exhaust gases upstream of the catalytic converter and thereby control the heat of exhaust gases provided to the catalytic converter for reduction of exhaust gases. The catalytic converter may use hydrogen as a reducing agent, thereby using the same fuel source for powering the engine and reduction of the exhaust gases rather than separate working fluids. The heat exchanger and/or operating parameters of the system may be controlled to control a temperature of exhaust gases at the catalytic converter and thereby control efficiency of the conversion of exhaust gases.

    EMISSIONS MODULE WITH ADJUSTABLE SIZING
    8.
    发明申请
    EMISSIONS MODULE WITH ADJUSTABLE SIZING 有权

    公开(公告)号：US20210231043A1

    公开(公告)日：2021-07-29

    申请号：US16751748

    申请日：2020-01-24

    Applicant: Caterpillar Inc.

    Inventor： Wesley Gene Benson ,  Andrew M. Denis ,  Joshua Lynn Ratts ,  Jack Albert Merchant

    IPC: F01N3/28 ,  F01N13/10

    Abstract: An emission module for treating exhaust gas including a housing, a first catalyst substrate positioned within the housing and having an inlet end, the first catalyst substrate defining a plurality of flow passages extending longitudinally from the inlet end, and a first restrictor plate positioned at the inlet end of the first catalyst substrate to block exhaust flow through a first portion of the plurality of flow passages while allowing exhaust flow through the remainder of the plurality of flow passages.

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