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    Control device and notification method
    1.
    发明授权
    Control device and notification method 有权

    公开(公告)号：US12230076B2

    公开(公告)日：2025-02-18

    申请号：US18272615

    申请日：2022-03-04

    Applicant: Komatsu Ltd.

    Inventor： Yoshitoshi Nagado ,  Shinichi Saitou ,  Toshio Kanda

    IPC: G07C5/08 ,  F01N3/023 ,  F01N3/10 ,  G07C5/00

    Abstract: An aspect of the present invention relates to a control device for an exhaust gas post-treatment device that includes a filter that collects a particulate substance in exhaust gas of an engine and an oxidation catalyst provided upstream of the filter, and that is configured to regenerate the filter by an action of the oxidation catalyst, the control device including a notification unit configured to, in a case in which forced regeneration for forcibly increasing a temperature of the exhaust gas is carried out, when the number of times it is estimated that the temperature of the exhaust gas is lower than a light-off temperature for a period of time equal to or longer than a prescribed period of time exceeds a prescribed threshold, issue a notification indicating that there is a problem in an operation state of the engine.

    Aftertreatment for alcohol fuel substituted diesel engines
    3.
    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.

    Annular catalytic converter
    5.
    发明授权
    Annular catalytic converter 有权

    公开(公告)号：US12201941B2

    公开(公告)日：2025-01-21

    申请号：US17526184

    申请日：2021-11-15

    Applicant: Vitesco Technologies GMBH

    Inventor： Rolf Brück ,  Peter Hirth ,  Sven Schepers ,  David Odenthal ,  Marat Karibayev ,  Ferdi Kurth

    IPC: B01D53/94 ,  B01J35/56 ,  F01N3/04 ,  F01N3/10 ,  F01N3/28

    Abstract: An annular catalytic converter, having a first, tubular flow path, having a diverting region and having a second, annular flow path, wherein the tubular flow path is formed by an inner pipe, wherein the annular flow path is formed between the inner pipe and an outer pipe surrounding the inner pipe, and the diverting region is of pot-shaped form for the purposes of diverting the exhaust-gas flow from the tubular flow path into the annular flow path, wherein the inner pipe and/or the outer pipe has a conical cross section that widens or narrows along the flow direction of the exhaust gas.

    AFTERTREATMENT SYSTEM INCLUDING PREHEATING OXIDATION CATALYST
    6.
    发明申请
    AFTERTREATMENT SYSTEM INCLUDING PREHEATING OXIDATION CATALYST 有权

    公开(公告)号：US20240418113A1

    公开(公告)日：2024-12-19

    申请号：US18816735

    申请日：2024-08-27

    Applicant: Cummins Emission Solutions Inc.

    Inventor： Shirish S. Punde ,  Rayomand Dabhoiwala ,  James Nicholas Reynolds

    IPC: F01N3/20 ,  F01N3/08 ,  F01N3/10 ,  F01N3/36 ,  F01N9/00 ,  F01N11/00

    Abstract: An aftertreatment system for treating exhaust gas includes: an exhaust conduit configured to receive the exhaust gas; a preheating oxidation catalyst disposed in the exhaust conduit; a primary oxidation catalyst disposed in the exhaust conduit downstream of the preheating oxidation catalyst; a selective catalytic reduction system disposed in the exhaust conduit downstream of the primary oxidation catalyst; and a controller configured to: determine a temperature of the exhaust gas at an inlet of the selective catalytic reduction system, and in response to the temperature of the exhaust gas at the inlet of the selective catalytic reduction system being below a threshold temperature, cause hydrocarbons to be provided to the preheating oxidation catalyst or to the exhaust conduit at a location upstream of the preheating oxidation catalyst. The preheating oxidation catalyst catalyzes combustion of the hydrocarbons so as to increase the temperature of the exhaust gas to above the threshold temperature.

    Mixer assembly
    9.
    发明授权
    Mixer assembly 有权

    公开(公告)号：US12158096B2

    公开(公告)日：2024-12-03

    申请号：US18328271

    申请日：2023-06-02

    Applicant: Tenneco GmbH

    Inventor： Sascha Haverkamp ,  Joachim Gehrlein ,  Stefan Kohrs ,  Eric A. Hein ,  Attila Kovacs

    IPC: F01N3/28 ,  B01F23/21 ,  B01F23/213 ,  B01F25/31 ,  B01F25/314 ,  B01F25/432 ,  F01N3/02 ,  F01N3/10 ,  F01N3/20 ,  F01N3/029

    Abstract: A mixer assembly comprises a tubular housing including an exhaust gas inlet, an exhaust gas outlet, and a reductant inlet on a side of the tubular housing. An upstream mixing element is positioned within the tubular housing upstream from the reductant inlet. A downstream mixing element is positioned within the tubular housing downstream from the reductant inlet and the upstream mixing element. The upstream and downstream mixing elements at least partially define a reductant receiving mixing chamber in which the injected reductant and exhaust gas mix. A divider is positioned within the tubular housing downstream from the upstream mixing element to split the exhaust into two divided flow streams prior to exiting through the exhaust gas outlet.

    DIESEL EXHAUST AFTERTREATMENT SYSTEMS AND METHODS
    10.
    发明申请
    DIESEL EXHAUST AFTERTREATMENT SYSTEMS AND METHODS 有权

    公开(公告)号：US20240392719A1

    公开(公告)日：2024-11-28

    申请号：US18673976

    申请日：2024-05-24

    Applicant: Roadwarrior Inc.

    Inventor： John MUTER ,  Dawei WANG ,  Zhengtong LI

    IPC: F01N13/18 ,  B01D53/94 ,  F01N3/035 ,  F01N3/10 ,  F01N3/20 ,  F01N13/00

    Abstract: An exhaust aftertreatment system for a vehicle includes first and second longitudinal frame rails and may include a first housing including a first inlet configured to be fluidly coupled to a supply of a gas, a plurality of diesel oxidation catalysts fluidly coupled to the first inlet, a plurality of diesel particulate filters fluidly coupled to the plurality of diesel oxidation catalysts, and a mixing chamber fluidly coupled to the plurality of diesel particulate filters. The exhaust aftertreatment system may include second housing including an inner channel fluidly coupled to the mixing chamber of the first housing, a selective catalytic reduction catalyst fluidly coupled to the inner channel, and an outlet fluidly coupled to the selective catalytic reduction catalyst and configured to permit the gas to exit the system, wherein the first housing is fluidly coupled to the second housing by a connecting portion.

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