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公开(公告)号：US20210293172A1
公开(公告)日：2021-09-23
申请号：US16316318
申请日：2017-07-06
Applicant: Scania CV AB
Inventor： Mikael LUNDSTRÖM , Sebastian ZAMANI , Carl WAHLSTRÖM
Abstract: The present invention relates to a method for diagnosing aftertreatment of exhaust gases resulting from combustion, wherein at least a first substance resulting from said combustion is reduced by supplying additive to an exhaust gas stream resulting from said combustion and use of a first reduction catalytic converter. The method includes: estimating an accumulated expected reduction of said first substance during a first period of time, determining an accumulated actual reduction of said first substance during a period of time at least substantially overlapping said first period of time, and generating a signal indicating a fault in said reduction of said first substance when said accumulated actual reduction differs from said accumulated expected reduction by a predetermined difference in occurrence of said first substance. The invention also relates to a corresponding system.
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公开(公告)号：US20210033011A1
公开(公告)日：2021-02-04
申请号：US16316302
申请日：2017-07-06
Applicant: Scania CV AB
Inventor： Mikael LUNDSTRÖM , Ola STENLÅÅS
Abstract: The present invention relates to a method for correcting a supply of additive to an exhaust gas stream resulting from combustion in an internal combustion engine. A first aftertreatment component being arranged for oxidation of nitric oxide into nitrogen dioxide, and a reduction catalytic converter being arranged downstream said first aftertreatment component. Additive is supplied to said exhaust gas stream for reduction of nitrogen oxides in said reduction catalytic converter, the additive being supplied in proportion to an occurrence of nitrogen oxides in said exhaust gas stream, said proportion being subject to correction. The method includes: supplying unburned fuel to said exhaust gas stream upstream said first aftertreatment component to reduce oxidation of nitric oxide into nitrogen dioxide in said first aftertreatment component, and correcting said supply of additive to said exhaust gas stream when supplying unburned fuel to said exhaust gas stream.
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公开(公告)号：US20150369107A1
公开(公告)日：2015-12-24
申请号：US14767358
申请日：2014-02-11
Applicant: SCANIA CV AB
Inventor： Mikael LUNDSTRÖM , Magnus FRÖBERG
CPC classification number: F01N11/002 , B01D53/9477 , B01D53/9495 , F01N3/208 , F01N2550/03 , F01N2560/026 , F01N2900/1614 , Y02A50/2325 , Y02T10/24 , Y02T10/47
Abstract: A method for troubleshooting in an SCR system which has a dosing unit (250) for dosing of reducing agent into an engine's exhaust duct (290) upstream of an SCR catalytic converter (270) for reduction of NOx content in an exhaust flow from said engine and a DOC unit (259). The method comprises steps of: determining (s310) NOx content in the exhaust flow downstream of said SCR catalytic converter (270); determining satisfactory operation of said SCR catalytic converter (270); progressively altering the dosage of said reducing agent; determining whether said SCR system can reduce NOx content of the exhaust flow downstream of said SCR catalytic converter to a predetermined extent during altered dosing; using the results of determinations as a basis for deciding whether said DOC unit (259) is faulty or not. Also disclosed is a computer programme product having the programme code (P) for a computer (200; 210) for implementing the method according to the invention. Also disclosed is a device for troubleshooting in an SCR system and to a motor vehicle equipped with the device.
Abstract translation: 一种用于在SCR系统中故障排除的方法，其具有用于将还原剂计量到SCR催化转化器（270）上游的发动机排气管道（290）中的计量单元（250），用于减少来自所述发动机的排气流中的NOx含量 和DOC单元（259）。 该方法包括以下步骤：确定（s310）所述SCR催化转化器（270）下游排气中的NOx含量; 确定所述SCR催化转化器（270）的令人满意的操作; 逐渐改变所述还原剂的用量; 在改变的给药期间，确定所述SCR系统是否可以将所述SCR催化转化器下游的排气流的NOx含量减少到预定的程度; 使用确定结果作为决定所述DOC单元（259）是否有故障的基础。 还公开了具有用于实现根据本发明的方法的计算机（200; 210）的程序代码（P）的计算机程序产品。 还公开了一种用于在SCR系统和配备有该装置的机动车辆中进行故障排除的装置。
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Patent Agency Ranking
4.发明申请公开(公告)号：US20210033012A1
公开(公告)日：2021-02-04
申请号：US16316310
申请日：2017-06-14
Applicant: Scania CV AB
Inventor： Mikael LUNDSTRÖM , Ola STENLÅÅS
Abstract: A method for diagnosing an aftertreatment component, wherein nitrogen oxide is reduced using a first catalytic converter upstream said aftertreatment component and a second catalytic converter downstream said aftertreatment component, said aftertreatment component oxidizing nitric oxide into nitrogen dioxide. A first sensor measure nitrogen oxide downstream said first catalytic converter but upstream said aftertreatment component, and a second sensor measure nitrogen oxide downstream said aftertreatment component. The method includes: supplying additive upstream said first catalytic converter; using said first and second sensors, performing a first measurement at a first temperature of said first aftertreatment component; using said first and second sensors, performing a second measurement at a second temperature of said first aftertreatment component; and diagnosing oxidation of nitric oxide into nitrogen dioxide in said aftertreatment component using said first and second measurements.
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公开(公告)号：US20180298834A1
公开(公告)日：2018-10-18
申请号：US15767338
申请日：2016-10-27
Applicant: Scania CV AB
Inventor： Mikael LUNDSTRÖM
CPC classification number: F02D41/0235 , B01D53/9418 , B01D53/9495 , B01D2251/2067 , F01N3/2066 , F01N3/208 , F01N9/00 , F01N11/00 , F01N2550/02 , F01N2560/026 , F01N2560/14 , F01N2610/02 , F01N2900/0416 , F01N2900/1818 , F02D41/1463 , F02D41/22 , F02D41/222 , F02D2250/26 , Y02A50/2325 , Y02T10/24 , Y02T10/47
Abstract: The present invention relates to a method for restricting work produced in a combustion chamber, wherein a substance resulting from combustion is reduced by supplying additive comprising a reagent to the exhaust gas stream. The method comprising: determining if a quality of said additive, estimated by means of a first sensor, being subjected to said additive, is below a first quality; determining if signals from a second sensor, being subjected to the exhaust gas stream, indicate insufficient reduction of said at least one substance; determining if a correction of the supply of additive has reached an upper limit; and restricting work produced by combustion only when: said estimated quality of said additive is below said first quality, said correction has reached said upper limit, and said measurement in the exhaust gas stream indicates insufficient reduction.
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公开(公告)号：US20220403768A1
公开(公告)日：2022-12-22
申请号：US17775619
申请日：2020-11-13
Applicant: Scania CV AB
Inventor： Mikael LUNDSTRÖM , Astrid SIMOVITS
Abstract: Disclosed is a method for diagnosing a first exhaust treatment component for treatment of an exhaust gas stream comprising means for oxidizing nitric oxide into nitrogen dioxide. A first reduction catalytic converter is arranged upstream said means for oxidizing nitric oxide into nitrogen dioxide, and a second reduction catalytic converter is arranged downstream said means. A reagent is for reduction of nitrogen oxides in said first catalytic converter, and a first sensor measures an occurrence of nitrogen oxide downstream said means but upstream said second reduction catalytic converter. The method comprises: causing a supply of reagent upstream said first reduction catalytic converter to an extent exceeding the extent to which reagent is consumed by the first reduction catalytic converter, determining a first measure of the occurrence of reagent downstream said means for oxidizing, and diagnosing said means for oxidizing nitric oxide into nitrogen dioxide based on said first measure.
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公开(公告)号：US20190055873A1
公开(公告)日：2019-02-21
申请号：US15767329
申请日：2016-10-27
Applicant: Scania CV AB
Inventor： Mikael LUNDSTRÖM
CPC classification number: F01N11/007 , F01N3/20 , F01N3/2066 , F01N9/00 , F01N11/00 , F01N2550/02 , F01N2550/03 , F01N2550/05 , F01N2560/026 , F01N2560/14 , F01N2590/08 , F01N2590/10 , F01N2610/02 , F01N2610/148 , F01N2900/0416 , F01N2900/1818 , Y02A50/2325
Abstract: The present invention relates to a method for restricting work produced by combustion in a combustion chamber, wherein an aftertreatment system is arranged for reduction of at least one substance resulting from the combustion, wherein the work produced by the combustion is restricted when there is a malfunction regarding reduction of the at least one substance. The method includes: performing a first evaluation regarding the reduction of the at least one substance, when the first evaluation indicates a malfunction, performing a second evaluation regarding the reduction of the at least one substance, the second evaluation being different from the first evaluation, and restricting work produced by the combustion only when a malfunction regarding reduction of the at least one substance is indicated also by the second evaluation.
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8.发明申请公开(公告)号：US20180298835A1
公开(公告)日：2018-10-18
申请号：US15767340
申请日：2016-10-27
Applicant: Scania CV AB
Inventor： Mikael LUNDSTRÖM , Christer LUNDBERG
Abstract: The present invention relates to a method for determining when to correct supply of additive to an exhaust gas stream resulting from combustion in at least one combustion chamber, wherein the additive is arranged for reduction of at least one substance resulting from said combustion by supplying the additive to an exhaust gas stream resulting from said combustion. The quantity of additive being supplied is subjectable to correction, and a sensor is subjected to the exhaust gas stream and arranged to measure occurrence of said at least one substance. The method comprises: by means of sensor signals from said sensor, determining a level of occurrence of said first substance in said exhaust gas stream, and determining when to correct said supply of additive on the basis of said occurrence of said first substance in said exhaust gas stream.
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