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    METHOD AND SYSTEM FOR TREATMENT OF AN EXHAUST GAS STREAM
    2.
    发明申请
    METHOD AND SYSTEM FOR TREATMENT OF AN EXHAUST GAS STREAM 审中-公开

    公开(公告)号：US20180223759A1

    公开(公告)日：2018-08-09

    申请号：US15750162

    申请日：2016-08-25

    Applicant: Scania CV AB

    Inventor： Magnus NILSSON ,  Henrik BIRGERSSON

    IPC: F02D41/14 ,  F01N3/035 ,  F01N3/20 ,  F01N11/00 ,  F01N13/00 ,  F02D41/00 ,  F02D41/40 ,  B01D53/94

    Abstract: An exhaust treatment system and method for the treatment of an exhaust stream from a combustion engine are provided. A first oxidation of compounds comprising one or more of nitrogen, carbon and hydrogen in the exhaust stream is carried out by a first oxidation catalyst. Further, a value (NO2_1/NOx_1)det for a ratio between a first amount of nitrogen dioxide and a first amount of nitrogen oxides leaving said first oxidation catalyst is determined. Active control of at least one parameter related to the combustion engine is carried out, based on the determined value, so that the ratio is impacted. A first additive is supplied into the exhaust stream, following which a first reduction of the first amount of nitrogen oxides is carried out through a catalytic reaction in a catalytic filter, which consists of a particulate filter with an at least partly catalytic coating with reduction characteristics. The catalytic filter is arranged for catching and oxidizing of soot particles, and to carry out the first reduction of the first amount of nitrogen oxides using the first additive.

    EXHAUST TREATMENT SYSTEM AND METHOD FOR TREATMENT OF AN EXHAUST GAS STREAM
    3.
    发明申请
    EXHAUST TREATMENT SYSTEM AND METHOD FOR TREATMENT OF AN EXHAUST GAS STREAM 审中-公开

    公开(公告)号：US20180221820A1

    公开(公告)日：2018-08-09

    申请号：US15750168

    申请日：2016-08-25

    Applicant: Scania CV AB

    Inventor： Magnus NILSSON ,  Henrik BIRGERSSON

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

    Abstract: An exhaust treatment system arranged for treatment of an exhaust stream is presented. The exhaust treatment system comprises a first reduction catalyst device arranged for reduction of nitrogen oxides in said exhaust stream through the use of compounds comprising one or several of carbon monoxide and hydrocarbons, which are comprised in said exhaust stream when said exhaust stream reaches said first reduction catalyst device; a particulate filter which is arranged downstream of said first reduction catalyst device to catch and oxidize soot particles in said exhaust stream; a second dosage device arranged downstream of said particulate filter and arranged to supply an additive comprising ammonia or a substance from which ammonia may be extracted and/or released into said exhaust stream; and a second reduction catalyst device, arranged downstream of said second dosage device and arranged for reduction of nitrogen oxides in said exhaust stream through the use of said additive.

    DEVICE AND METHOD AT AN EXHAUST AFTERTREATMENT SYSTEM FOR AN ENGINE
    6.
    发明申请
    DEVICE AND METHOD AT AN EXHAUST AFTERTREATMENT SYSTEM FOR AN ENGINE 有权
    用于发动机的排气后处理系统的装置和方法

    公开(公告)号：US20160097312A1

    公开(公告)日：2016-04-07

    申请号：US14889538

    申请日：2014-05-21

    Applicant: SCANIA CV AB

    Inventor： Magnus NILSSON ,  Henrik BIRGERSSON ,  Andreas LILJESTRAND

    IPC: F01N3/20

    CPC classification number: F01N3/208 ,  F01N3/22 ,  F01N2610/02 ,  F01N2900/08 ,  F01N2900/1404 ,  F01N2900/1602 ,  F01N2900/1811 ,  Y02A50/2325 ,  Y02T10/24

    Abstract: A method at an exhaust gas cleaning system for an engine (235) in which a reducing agent is added to a passage (290) for exhaust gases from the engine (235) for cleaning the exhaust gases. The exhaust gas cleaning system includes arrangements (270) that require a certain temperature level (Tmax) in order to achieve catalytic exhaust gas cleaning. The method is to distribute and store (s430) a limited amount of reducing agent at temperature level (Tmax); and to use (s440) during a cold start of the exhaust gas cleaning system, the distributed and stored reducing agent to achieve the catalytic exhaust gas cleaning. Also a computer program product (200; 210) to implement the method. Also an arrangement for an exhaust gas cleaning system for an engine (235), and a motor vehicle (100) equipped with the arrangement.

    Abstract translation: 一种用于发动机（235）的排气清洁系统的方法，其中将还原剂添加到用于来自用于清洁废气的发动机（235）的废气的通道（290）中。 排气清洁系统包括需要一定温度水平（Tmax）的装置（270），以实现催化废气清洁。 该方法是在（tmax）温度下分配（s430）有限量的还原剂; 并且在排气清洁系统的冷启动期间使用（s440）分配和储存的还原剂来实现催化废气清洁。 还有一种用于实现该方法的计算机程序产品（200; 210）。 还有一种用于发动机（235）的排气清洁系统和配备有该装置的机动车辆（100）的装置。

    METHOD AND SYSTEM FOR CONTROL OF AT LEAST ONE OF A DOSAGE DEVICE AND AN ENGINE
    7.
    发明申请
    METHOD AND SYSTEM FOR CONTROL OF AT LEAST ONE OF A DOSAGE DEVICE AND AN ENGINE 审中-公开

    公开(公告)号：US20200049047A1

    公开(公告)日：2020-02-13

    申请号：US16495621

    申请日：2018-03-23

    Applicant: Scania CV AB

    Inventor： Henrik BIRGERSSON ,  Stefan ORRLING ,  David TEMPELMANN

    IPC: F01N3/20 ,  F02D41/40 ,  F02D41/38 ,  F01N9/00 ,  F02D41/00

    Abstract: A method and a system for control of a dosage device and/or an engine that produces an exhaust stream (203) treated by an exhaust treatment system (250) that injects at least one additive into the exhaust stream (203) with a dosage device (271) to evaporate in an evaporation chamber (280). The method includes determining a time dependent condition of a position at an internal wall (281) of the evaporation chamber (280), the condition being determined based on the internal temperature related to the position, the internal temperature being determined based on a temperature model for the evaporation chamber (280) and an exhaust temperature for the exhaust stream (203) upstream of the evaporation chamber (208); determining a risk for at least one spatially resolved critical condition related to the position based on the time dependent condition, and controlling the dosage device (271) and/or the engine based on the determined risk.

    EXHAUST TREATMENT SYSTEM AND METHOD FOR TREATMENT OF AN EXHAUST STREAM
    8.
    发明申请
    EXHAUST TREATMENT SYSTEM AND METHOD FOR TREATMENT OF AN EXHAUST STREAM 审中-公开

    公开(公告)号：US20190040778A1

    公开(公告)日：2019-02-07

    申请号：US16032706

    申请日：2018-07-11

    Applicant: Scania CV AB

    Inventor： Magnus NILSSON ,  Henrik BIRGERSSON

    IPC: F01N3/20 ,  F01N9/00 ,  F01N13/00 ,  B01D46/00 ,  B01D53/94 ,  F01N3/021 ,  F01N3/023 ,  F01N3/035 ,  F01N3/10 ,  F01N11/00

    Abstract: An exhaust treatment system comprising: a first dosage device, arranged to supply a first additive into said exhaust stream; a first reduction catalyst device, downstream of said first dosage device arranged for reduction of nitrogen oxides in said exhaust stream through the use of said first additive; a particulate filter, at least partly comprising a catalytically oxidizing coating, which is downstream of said first reduction catalyst device to catch soot particles, and to oxidize one or several of nitrogen oxide and incompletely oxidized carbon compounds in said exhaust stream; a second dosage device, downstream of said particulate filter to supply a second additive into said exhaust stream; and a second reduction catalyst device, downstream of said second dosage device for a reduction of nitrogen oxides in said exhaust stream, with the use of at least one of said first and said second additive.

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