CN1267627C - 内燃机的NOx清除设备和NOx清除方法 - Google Patents

内燃机的NOx清除设备和NOx清除方法 Download PDF

Info

Publication number
CN1267627C
CN1267627C CNB021590672A CN02159067A CN1267627C CN 1267627 C CN1267627 C CN 1267627C CN B021590672 A CNB021590672 A CN B021590672A CN 02159067 A CN02159067 A CN 02159067A CN 1267627 C CN1267627 C CN 1267627C
Authority
CN
China
Prior art keywords
actual
amount
catalyst
reducing agent
adsorption amount
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CNB021590672A
Other languages
English (en)
Other versions
CN1448620A (zh
Inventor
河合健二
高桥嘉则
齐藤真一
川谷圣
武田好央
篠崎律子
百目木礼子
桥诘刚
平沼智
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Fuso Truck and Bus Corp
Original Assignee
MITSUBISHI FOSON COACH (PASSENGER) CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MITSUBISHI FOSON COACH (PASSENGER) CO Ltd filed Critical MITSUBISHI FOSON COACH (PASSENGER) CO Ltd
Publication of CN1448620A publication Critical patent/CN1448620A/zh
Application granted granted Critical
Publication of CN1267627C publication Critical patent/CN1267627C/zh
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
    • F02D41/1461—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases emitted by the engine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9495—Controlling the catalytic process
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2067—Urea
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • B01D2257/404—Nitrogen oxides other than dinitrogen oxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/18—Ammonia
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
    • F01N2900/1621—Catalyst conversion efficiency
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
    • F01N2900/1622—Catalyst reducing agent absorption capacity or consumption amount
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

在发动机(1)的排气系统中具有通过吸收氨而选择性地还原废气中NOX的NOX触媒(17)，还原剂供给装置(29)将氨或尿素水供给NOX触媒，根据NOX排气量导出装置(41)检测或估计的发动机排出的NOX排气量以及实际NOX清除率导出装置(42)导出的NOX触媒的实际NOX清除率，消耗量导出装置(43)导出NOX触媒吸附的氨消耗量，根据氨的添加量和吸附量导出装置(45)导出的氨的消耗量，导出NOX触媒吸附的氨的实际消耗量，并且控制装置(46)根据实际吸附量控制还原剂供给装置。

Description

内燃机的NOX清除设备和NOX清除方法
发明领域
本发明涉及内燃机的NOX清除设备和NOX清除方法，所述内燃机具有NOX触媒，在富氧气氛中该触媒具有清除废气中的NOX的作用。
背景技术
公知的NOX清除设备利用氨作为选择性还原触媒的还原剂，所述氨由将尿素水加入废气中水解产生，或者将氨直接加入废气中。安装在使用内燃机的交通工具中的这种NOX清除设备，其设计方式是，将选择性还原触媒布置在内燃机的排气系统中，将作为还原剂的尿素水或氨从触媒的上游一侧加入到废气中，然后供给NOX触媒，所述选择性还原触媒，即所谓尿素SCR触媒(下称为NOX触媒)，可以在富氧气氛中清除废气中的NOX。
一般地，NOX清除设备的NOX清除率非常依赖于NOX触媒的性能，上述包括氨作为还原剂的NOX触媒具有在超过350℃温度范围内高效还原NOX的工艺性能。
当尿素水加入废气时，按以下方程(1)经过水解和热解产生氨(NH3)：
………………(1)
在触媒温度高或低时，氨(NH3)和氮的氧化物(NOX)在NOX触媒上的脱氮反应按不同方式进行，即在高温下主要按方程(2)进行，在低温下主要按方程(3)进行：
………………(2)
………………(3)
如图8中的实线所示，这种包括氨作为还原剂的NOX触媒吸附的氨量越大，NOX的清除率就越高，因此优选的是，为了使NOX触媒在低温区达到高的清除率，应保持高的氨吸附量。NOX触媒对氨的吸附量有一个极限，在图9中实线n所示的吸附极限值取决于触媒的温度。
交通工具的工作状态是连续变化的，内燃机的废气排放流速、废气中NOX的含量以及触媒的温度变化较大，因此，当交通工具上安装了含有具有这种性质的NOX触媒的NOX清除设备时，需要根据交通工具工作状态的变化为NOX触媒提供氨。当供给NOX触媒的氨不能与工作状态适应时，例如，当氨供给量小时，NOX触媒的氨吸附量不足，NOX不能充分还原；当氨供给量过大并超过吸附极限值时，容易发生所谓的氨的逸出现象，即把没有被NOX触媒吸附的氨排放到大气中。
发明内容
本发明解决了此问题，并且本发明的目的是提供内燃机的NOX清除设备和NOX清除方法，以便可以在并保持高的NOX清除率的同时，有效地制止导入的氨的逸出。
根据本发明的内燃机的NOX清除设备包括：NOX触媒，位于内燃机排气系统中，其通过吸附还原剂而选择性地还原废气中的NOX；还原剂供给装置，用于为所述NOX触媒供给所述还原剂；NOX排放量导出装置，用于检验或测定内燃机的NOX排放量；NOX实际清除率导出装置，用于导出NOX触媒的实际的NOX清除率；消耗量导出装置，其根据所述NOX排放量导出装置所检验或测定的NOX排放量以及所述NOX实际清除率导出装置导出的实际清除率，导出吸附到NOX触媒上的还原剂的消耗量；吸附量导出装置，其根据所述消耗量导出装置导出的还原剂的消耗量以及所述还原剂供给装置供给的还原剂添加量，导出吸附到NOX触媒上的还原剂实际吸附量；以及控制装置，根据所述吸附量导出装置导出的实际吸附量控制所述还原剂供给装置。
于是根据本发明，通过检测吸附到NOX触媒上的还原剂的实际吸附量，可以供给恰当数量的还原剂，以满足还原NOX排放量所需的还原剂吸附量，而且可在达到高的NOX清除率的同时，减少还原剂的用量，并可减少例如氨的逸出。
附图说明
图1是本发明第一实施方式的NOX清除设备的总构造图；
图2是第一实施方式中进行NOX清除处理程序的流程图；
图3是在第一实施方式中，当目标吸附量和实际吸附量互相一致时，排气温度与氨吸收量之间的关系；
图4是在第一实施方式中，当目标吸附量和实际吸附量不一致时，排气温度与氨吸收量之间的关系；
图5是根据本发明第二实施方式的NOX清除设备的总构造图；
图6是第二实施方式中进行NOX清除处理程序的流程图；
图7是第二实施方式中排气温度与基准清除率之间关系的特征曲线图；
图8是NOX触媒的氨吸收量和NOX清除率之间关系的特征曲线图；
图9是NOX触媒温度和氨吸附量之间关系的特征曲线图。
具体实施方式
下面解释根据本发明第一实施方式的内燃机NOX清除设备。在图1中，符号1代表安装在交通工具(未示出)上的柴油发动机(下文称发动机)。发动机1的输出由发动机控制装置5控制。在这种情况下，发动机控制装置5根据吸气流速和燃料喷射量导出排气流速G并输出到排气控制装置4。
排气控制装置4和发动机控制装置5的关键部分是由公知的微电脑构成，这些微电脑通过控制系统通讯网络相互连通。可以根据发动机转数和燃料喷射量导出排气流速G。
NOX清除设备具有如下装置：NOX触媒17，其被安装在与发动机1的排气歧管25相连并构成排气系统的排气管28中，用于选择性地还原废气中的NOX；还原剂供给装置，用于向NOX触媒17提供氨；NOX排气量导出装置41，其用来估算作为从发动机1中排出的NOX排放量的NOX质量流速Unox；实际NOX清除率导出装置42，其用来导出NOX触媒17的实际NOX清除率η；消耗量导出装置43，其根据NOX排气量导出装置41估算的NOX质量流速Unox以及实际NOX清除率导出装置42导出的实际NOX清除率η，导出吸附到NOX触媒17上的氨消耗量f(η，Unox)；吸附量导出装置45，其根据还原剂供给装置29供给的氨的添加量DNH3以及消耗量导出装置43导出的氨消耗量f(η，Unox)，导出吸附到NOX触媒17上的实际氨吸附量SNH3(n)；目标吸附量设定装置47，其用来设定NOX触媒17的目标氨吸附量MNH3；控制装置46，其根据吸附量导出装置45导出的实际吸附量SNH3(n)与目标吸附量设定装置47设定的目标吸附量MNH3的对比结果，来控制还原剂供给装置29；和基本添加量导出装置50，其用来导出氨的基本添加量UDNH3。
NOX触媒17的安装是，将触媒成分附着到蜂窝结构的触媒载体上，并将该载体包含在排气管28中NOX触媒转化器27的外壳中。当NOX触媒17含有选择性还原触媒时，其中具有钒类、铂类、沸石类等。NOX触媒17通过吸附氨(NH3)并在氨吸附状态下选择性地还原废气24中的NOX。根据废气24中NOX气氛的温度高或低，通过在高温下主要进行方程(2)的反应以及低温下主要进行方程(3)的反应，NOX触媒17加速NH3与氮的氧化物之间的脱氮反应。
NOX触媒17具有触媒温度传感器22，用于输出触媒温度Tg。否则，根据与触媒温度相关的参数，例如，发动机转数和燃料喷射量、各个发动机工作区的工作时间周期以及环境温度，可以计算出触媒温度的估计值作为触媒温度Tg。
还原剂供给装置29具有如下部件：添加喷嘴18，其被安装在前方NOX传感器19与NOX触媒17之间的排气管28上，用来将尿素水喷射到NOX触媒转化器27的上游开口一侧；喷管31，其与添加喷嘴18相连；空气罐32，其被连接到喷管31上游端；压缩空气控制阀33，其用来控制供给到喷管31的压缩空气；尿素水供给管34，其在压缩空气阀33的下游位置与喷管连接；尿素水罐35，其含有用于添加的尿素水；以及尿素水供给部分37，其用来控制尿素水罐35内的尿素水从尿素水供给管34供给到喷管31。压缩空气控制阀33和尿素水供给部分37通过信号线连接到控制装置46。
根据NOX触媒17上游侧的NOX浓度Snoxf和废气流速G，NOX排气量导出装置41导出NOX质量流速Unox，所述NOX浓度Snoxf由NOX触媒17上游侧的排气管28上的前方NOX传感器19检测得到，所述废气流速G为来自发动机控制装置5的相应于发动机1的废气排出量。
NOX触媒17下游侧的排气管28具有后方NOX传感器26，该传感器用于检测NOX触媒17下游侧的NOX浓度Snoxr。分别来自NOX传感器19和26的NOX浓度Snoxf和Snoxr被输出到实际NOX清除率导出装置42。
实际NOX清除率导出装置42是运算电路，其通过处理NOX传感器19和26得出的NOX浓度Snoxf和Snoxr，计算出二者之差Snoxf-Snoxr，并用该差值除以Snoxf，从而求得实际NOX清除率(η)。
基本添加量导出装置50具有氨的基本添加量计划，该计划是根据发动机的工作状态预先设定的，以满足图3和图4中虚线L2所示的NOX触媒17的氨吸附量，该装置根据触媒温度Tg恰当地选择氨的基本添加量DNH3，并将该添加量输出到吸附量导出装置45。
目标吸附量设定装置47具有设定的计划，该装置根据触媒温度检测装置检测或估计的触媒温度Tg，来设定NOX触媒17吸附的氨的目标吸附量MNH3。
吸附量导出装置45是运算电路，该装置根据上次导出的实际吸附量SNH3(n-1)、基本添加量导出装置50导出的氨的基本添加量DNH3以及本次导出的氨的消耗量f(η，Unox)，按下面的方程(4)导出估计的实际吸附量SNH3(n)：
SNH3(n)＝SNH3(n-1)+DNH3-f(η，Unox)………(4)
根据本实施方式，废气控制装置4包括NOX排放量导出装置41、实际NOX清除率导出装置42、消耗量导出装置43、吸附量导出装置45、控制装置46以及目标吸附量设定装置47和基本添加量导出装置50。控制装置46控制压缩空气控制阀33和尿素水供给部分37的驱动。
下面将根据图2的NOX清除过程解释NOX清除设备的NOX控制处理。
在驱动装有NOX清除设备的交通工具(未示出)的发动机1时，发动机控制装置5确认自检结果是否正常，或者由多个控制系统，如燃料喷射系统、燃料供给系统等恰当地控制的相关装置和传感器的工作是否正常。如果正常(OK)，根据上述各个传感器的各输入值，将控制信号传送到燃料喷射系统和燃料供给系统进行控制，并将此时得到的传感器的输出等也传送到废气控制装置4。
在每次预定的控制循环中，在发动机键打开的同时，在废气控制装置4重复图2中NOX清除过程的NOX清除处理控制。在步骤R1，废气控制装置4确认键打开，在步骤R2输入触媒温度Tg、废气流速G、NOX浓度Snoxf和Snoxr、上次的吸附量SNH3(n-1)等数据。
在步骤R3，废气控制装置4分别计算如下各项：利用废气流速G和NOX浓度Snoxf计算NOX质量流速Unox；利用NOX浓度Snoxf和Snoxr计算实际NOX清除率η；根据触媒温度Tg计算氨的基本添加量DNH3作为NOX触媒17新吸附的氨量；根据来自构成目标吸附量设定装置47的图的触媒温度Tg，计算目标吸附量MNH3，接着执行步骤R4。
在步骤R4，废气控制装置4根据NOX质量流速Unox和实际NOX清除率η导出消耗量f(η，Unox)；在步骤R5利用方程(4)计算导出实际吸附量SNH3(n)。
在步骤R6，废气控制装置4对比实际吸附量SNH3(n)和目标吸附量MNH3，当实际吸附量SNH3(n)超过目标吸附量MNH3时，有可能发生氨的逸出，因此执行步骤R9，尿素水供给部分37停止加入尿素水，控制还原剂供给装置29停止，从而完成本次控制循环。
当实际吸附量SNH3(n)没有超过目标吸附量MNH3时，废气控制装置4执行步骤R7，利用二者之差校正氨的基本添加量DNH3以满足目标吸附量MNH3，从而导出实际氨的添加量DNH3(n)，并执行步骤R8。在步骤R8，当实际吸附量SNH3(n)＝目标吸附量MNH3时，如图3所示，废气控制装置4不校正基本添加量DNH3；当实际吸附量SNH3(n)＜目标吸附量MNH3时，如图4所示，给基本添加量DNH3加上一个差值。在步骤R8，通过控制驱动还原剂供给装置29的尿素水供给部分37，结束当前控制循环。
通过步骤R8的控制操作，尿素水供给部分37根据氨的实际添加量DNH3(n)或基本添加量DNH3，经喷管31由添加喷嘴18向排气管28中提供尿素水。
根据本实施方式，还原剂供给装置29由控制装置46根据实际吸附量SNH3(n)和目标吸附量MNH3的比较结果进行控制，因此即使实际吸附量SNH3(n)出现误差，也将恰当地校正氨的基本添加量DNH3，因此可以给NOX触媒17供给恰当的氨量并被NOX触媒17吸附，达到还原NOX废气量所需的氨吸附量，从而有效抑制氨的逸出，同时维持高的NOX清除率。
当实际吸附量SNH3(n)的精度非常高时，可以使用加入实际添加量DNH3的控制模式，根据氨消耗量f校正基本添加量，而不对比实际吸附量SNH3(n)和目标吸附量MNH3。
下面参考图5解释根据本发明的第二实施方式的内燃机NOX清除设备。根据此实施方式的NOX清除设备，除了废气控制装置40与废气控制装置4不同，其构造与第一实施方式基本相同。因此，与图1的第一实施方式中相同功能的结构采用了相同的符号，这里省去其详细解释。
废气控制装置40的特征在于，其提供了基准NOX清除率导出装置52以及校正装置51，并根据被校正装置51校正的实际吸附量SNH3(n)，通过控制装置46来控制还原剂供给装置29；根据由吸附量导出装置45导出的实际吸附量SNH3(n)、NOX触媒17的触媒温度Tg或与触媒温度相关的参数，所述基准NOX清除率导出装置52被用来导出基准NOX清除率Sη；根据由基准NOX清除率导出装置52导出的基准NOX清除率Sη，与实际NOX清除率导出装置42导出的实际NOX清除率(η)的对比结果，所述校正装置51被用来校正实际NOX清除率导出装置42导出的实际NOX清除率η。
根据图7所示的触媒温度与NOX清除率间的关系，以及图8所示的氨吸附量与NOX清除率间的关系，由基准NOX清除率导出装置52导出基准NOX清除率Sη。
下面参照图6的NOX清除处理程序解释根据第二实施方式的NOX清除设备的NOX控制处理。
在每次预定的控制循环中，在发动机键打开的同时，在废气控制装置40重复图6中NOX清除过程的NOX清除处理控制。在步骤S1，废气控制装置40确认键打开，在步骤S2输入触媒温度Tg、废气流速G、NOX浓度Snoxf和Snoxr、上次的吸附量SNH3(n-1)等数据。
在步骤S3，废气控制装置40分别计算如下各项：利用废气流速G和NOX浓度Snoxf计算NOX质量流速Unox；利用NOX浓度Snoxf和Snoxr计算实际NOX清除率η；根据基本添加量导出装置50的图的触媒温度Tg，计算氨的基本添加量DNH3作为NOX触媒17新吸附的氨量，接着执行步骤S4。
在步骤S4，废气控制装置40根据NOX质量流速Unox和实际NOX清除率η导出消耗量f(η，Unox)，进入步骤S5。在步骤S5利用方程(4)计算导出实际吸附量SNH3(n)，进入步骤S6。
在步骤S6，废气控制装置40根据实际吸附量SNH3(n)和触媒温度Tg计算出基准NOX清除率Sη，进入步骤S7。在步骤S7，废气控制装置40由基准NOX清除率Sη和实际NOX清除率η计算清除率误差Gη，进入步骤S8。在步骤S8，废气控制装置40对比先前设定的基准误差Z和清除率误差Gη，当清除率误差Gη在基准误差Z的范围内时，执行步骤S9并控制还原剂供给装置29的尿素水供给部分37的驱动，提供相应于基本添加量DNH3的氨的尿素水，以便加入基准添加量DNH3的氨，从而满足实际吸附量SNH3(n)，至此结束本次控制循环。
当清除率误差Gη偏离基准误差Z的范围内时，废气控制装置40执行步骤S1O，校正实际吸附量SNH3(n)，校正基本添加量DNH3满足校正值，从而导出实际添加量DNH3(n)，进入步骤S11。在步骤S11，废气控制装置40控制还原剂供给装置29的尿素水供给部分37的驱动，提供相应于实际添加量DNH3(n)的氨的尿素水，以便加入校正的实际添加量DNH3(n)，从而结束当前控制循环。
通过步骤S9、S11的控制操作，尿素水供给部分37由添加喷嘴18经喷管31，向排气管28中提供尿素水，该尿素水的量与实际添加量DNH3(n)或基本添加量DNH3的氨量相应。
根据此实施方式，根据基准NOX清除率Sη和实际NOX清除率η的对比结果校正实际吸附量SNH3(n)，因此当基准NOX清除率Sη与实际NOX清除率η之差超过基准误差Z时，校正实际吸附量SNH3(n)，并由控制装置46根据校正的实际吸附量SNH3(n)控制还原剂供给装置29。这样，即使实际吸附量SNH3(n)出现误差，也将恰当地校正氨的基本添加量DNH3，因此通过将恰当的氨量供给NOX触媒17而被NOX触媒17吸附，达到还原NOX废气量所需的氨吸附量，从而有效抑制氨的逸出的发生，同时维持高的NOX清除率。

Claims (7)

1.内燃机的NOX清除设备，所述NOX清除设备包括：
NOX触媒(17)，位于内燃机的排气系统中，其通过吸附还原剂选择性地还原废气中的NOX；
还原剂供给装置(29)，用于为所述NOX触媒供给所述还原剂；
NOX排放量导出装置(41)，用于检验或测定内燃机的NOX排放量；
NOX实际清除率导出装置(42)，用于导出NOX触媒(17)的实际的NOX清除率；
消耗量导出装置(43)，其根据所述NOX排放量导出装置(41)所检验或测定的NOX排放量以及所述NOX实际清除率导出装置(42)导出的实际清除率，导出吸附到NOX触媒(17)上的还原剂消耗量；
吸附量导出装置(45)，其根据所述消耗量导出装置(43)导出的还原剂消耗量以及所述还原剂供给装置(29)供给的还原剂添加量，导出吸附到NOx触媒上的还原剂实际吸附量；以及
控制装置(46)，根据所述吸附量导出装置(45)导出的实际吸附量控制所述还原剂供给装置(29)。
2.如权利要求1所述的内燃机的NOX清除设备，其特征在于还原剂供给装置(29)供给的还原剂是氨或尿素水。
3.如权利要求1所述的内燃机的NOX清除设备，其特征在于根据NOX触媒(17)上游侧排气系统中的前方NOX传感器(19)检测的上游侧NOX浓度与NOX触媒下游侧排气系统中的后方NOX传感器(26)检测的下游侧NOX浓度之差或之比，实际NOX清除率导出装置(42)导出实际NOX清除率。
4、如权利要求1所述的内燃机的NOX清除设备，该设备还包括：
目标吸附量设定装置(47)，根据NOX触媒(17)的触媒温度或与触媒温度相关的参数设定NOX触媒的还原剂目标吸附量；
其特征在于根据吸附量导出装置(45)导出的实际吸附量与目标吸附量设定装置(47)设定的目标吸附量的对比结果，控制装置(46)控制还原剂供给装置(29)。
5、如权利要求1所述的内燃机的NOX清除设备，该设备还包括：
基准NOX清除率导出装置(52)，根据吸附量导出装置(45)导出的实际吸附量和NOX触媒(17)的触媒温度或与触媒温度相关的参数，导出基准NOX清除率；
校正装置(51)，根据基准NOX清除率导出装置(52)导出的基准NOX清除率与实际NOX清除率导出装置(42)导出的实际NOX清除率的对比结果，校正吸附量导出装置(45)导出的实际吸附量；
其特征在于根据校正装置(51)校正的实际吸附量，控制装置(40)控制还原剂供给装置(29)。
6、如权利要求1所述的内燃机的NOX清除设备，其特征在于根据还原剂供给装置(29)提供的还原剂的添加量与消耗量导出装置(43)导出的还原剂的消耗量之差与吸附量导出装置(45)上次导出的吸附量数值之和，吸附量导出装置(45)导出NOX触媒(17)吸附的还原剂的实际吸附量。
7、如权利要求2所述的内燃机的NOX清除设备，其特征在于控制装置(46)控制还原剂供给装置(29)，使实际吸附量落在NOX触媒不会发生氨逸出的极限值的附近。
CNB021590672A 2002-03-29 2002-12-27 内燃机的NOx清除设备和NOx清除方法 Expired - Lifetime CN1267627C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP095987/2002 2002-03-29
JP2002095987A JP3951774B2 (ja) 2002-03-29 2002-03-29 内燃機関のＮОｘ浄化装置

Publications (2)

Publication Number Publication Date
CN1448620A CN1448620A (zh) 2003-10-15
CN1267627C true CN1267627C (zh) 2006-08-02

Family

ID=27800557

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB021590672A Expired - Lifetime CN1267627C (zh) 2002-03-29 2002-12-27 内燃机的NOx清除设备和NOx清除方法

Country Status (6)

Country Link
US (1) US6755014B2 (zh)
EP (1) EP1348477B1 (zh)
JP (1) JP3951774B2 (zh)
KR (1) KR100490813B1 (zh)
CN (1) CN1267627C (zh)
DE (1) DE60203781T2 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105804841A (zh) * 2014-09-17 2016-07-27 现代自动车株式会社 控制吸附在催化器中氨量的方法及使用该方法的排放系统

Families Citing this family (109)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001303934A (ja) * 1998-06-23 2001-10-31 Toyota Motor Corp 内燃機関の排気浄化装置
US7497076B2 (en) * 2002-05-07 2009-03-03 Extengine Transport Systems Emission control system
DE10301477A1 (de) * 2003-01-17 2004-07-29 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben einer Dosiereinheit eines Katalysators
JP4284087B2 (ja) * 2003-02-18 2009-06-24 本田技研工業株式会社 内燃機関の排気ガス浄化装置
EP1477655A1 (en) * 2003-05-13 2004-11-17 Haldor Topsoe A/S Process for controlled addition of a reducing agent into nitrogen oxides containing exhaust gas
JP3687915B2 (ja) * 2003-10-27 2005-08-24 日産ディーゼル工業株式会社 液体判別装置
JP3687917B2 (ja) * 2003-10-31 2005-08-24 日産ディーゼル工業株式会社 液体還元剤の濃度及び残量検出装置
SE526404C2 (sv) * 2004-01-20 2005-09-06 Scania Cv Abp Förfarande och anordning för styrning av insprutning av reduktionsmedel
JP2006002663A (ja) * 2004-06-17 2006-01-05 Hino Motors Ltd 排気浄化装置
JP2006022729A (ja) * 2004-07-08 2006-01-26 Hino Motors Ltd 排気浄化装置の制御方法
JP4267535B2 (ja) * 2004-07-23 2009-05-27 日野自動車株式会社 排気浄化装置のＮＯｘ低減率測定方法
JP4267536B2 (ja) * 2004-08-09 2009-05-27 日野自動車株式会社 排気浄化装置の制御方法
US7784272B2 (en) * 2004-08-31 2010-08-31 Cummins Inc. Control system for an engine aftertreatment system
GB0421837D0 (en) * 2004-10-01 2004-11-03 Eps Technologies Inc Catalyst delivery system
DE102004050023A1 (de) * 2004-10-13 2006-04-27 L'orange Gmbh Einrichtung zur dosierten Einspritzung eines Reduktionsmittels in den Abgastrakt einer Brennkraftmaschine
US7644577B2 (en) * 2004-10-29 2010-01-12 Philip Morris Usa, Inc. Reducing agent metering system for reducing NOx in lean burn internal combustion engines
ATE369486T1 (de) * 2004-12-18 2007-08-15 Haldor Topsoe As Verfahren zur regelung der zugabe eines reduktionsmittels in das abgas einer brennkraftmaschine
US7178328B2 (en) * 2004-12-20 2007-02-20 General Motors Corporation System for controlling the urea supply to SCR catalysts
US8215098B2 (en) * 2005-05-02 2012-07-10 Cummins Inc. Method and apparatus for diagnosing exhaust gas aftertreatment component degradation
DE102005031720B4 (de) 2005-07-07 2020-06-18 Daimler Ag Verfahren zur Dosierung eines Reduktionsmittels
US20070042495A1 (en) * 2005-08-22 2007-02-22 Detroit Diesel Corporation Method of controlling injection of a reducing agent in an engine emissions control system
US7418816B2 (en) * 2005-09-01 2008-09-02 Ford Global Technologies, Llc Exhaust gas aftertreatment systems
US20070044456A1 (en) * 2005-09-01 2007-03-01 Devesh Upadhyay Exhaust gas aftertreatment systems
DE102005045029A1 (de) * 2005-09-22 2007-03-29 Man Nutzfahrzeuge Ag Mittels Abgasturbolader aufgeladene Brennkraftmaschine mit einem Abgasstrang mit SCR-Katalysator(en)
DE102005048117A1 (de) * 2005-10-06 2007-04-12 Emitec Gesellschaft Für Emissionstechnologie Mbh Verfahren und Vorrichtung zur Reduktion des Stickoxidanteils im Abgas einer Verbrennungskraftmaschine
JP4789242B2 (ja) * 2005-12-09 2011-10-12 Ｕｄトラックス株式会社 排気浄化装置
JP4432917B2 (ja) * 2006-03-06 2010-03-17 トヨタ自動車株式会社 内燃機関の排気浄化装置
US7426825B2 (en) * 2006-07-25 2008-09-23 Gm Global Technology Operations, Inc. Method and apparatus for urea injection in an exhaust aftertreatment system
US7610750B2 (en) * 2006-07-25 2009-11-03 Gm Global Technology Operations, Inc. Method and apparatus for monitoring a urea injection system in an exhaust aftertreatment system
JP4656071B2 (ja) * 2007-03-01 2011-03-23 トヨタ自動車株式会社 内燃機関の排気浄化装置
FR2914013A1 (fr) * 2007-03-22 2008-09-26 Peugeot Citroen Automobiles Sa Procede d'injection d'uree a basse temperature
JP4459987B2 (ja) * 2007-06-27 2010-04-28 株式会社デンソー 排気浄化剤の添加量制御装置、及び排気浄化システム
JP4388103B2 (ja) * 2007-06-27 2009-12-24 株式会社デンソー 排気浄化剤の添加量制御装置、及び排気浄化システム
JP4459986B2 (ja) * 2007-06-27 2010-04-28 株式会社デンソー 排気浄化剤の添加量制御装置、及び排気浄化システム
DE202008001547U1 (de) 2007-07-24 2008-04-10 Emcon Technologies Germany (Augsburg) Gmbh Baugruppe zur Einbringung eines Reduktionsmittels in die Abgasleitung einer Abgasanlage einer Verbrennungskraftmaschine
DE102007044610B4 (de) * 2007-09-19 2010-04-08 Continental Automotive Gmbh Verfahren zur Detektion der minimalen Öffnungszeit einer Reduktionsmittelzuführeinrichtung in einem Abgasnachbehandlungssystem mit einem SCR-Katalysator
JP4847939B2 (ja) * 2007-10-02 2011-12-28 三菱ふそうトラック・バス株式会社 排気浄化装置
JP2009091984A (ja) * 2007-10-09 2009-04-30 Mitsubishi Fuso Truck & Bus Corp 排気浄化装置
DE102007048560A1 (de) * 2007-10-09 2009-04-23 Audi Ag Vorrichtung zum Nachbehandeln von Abgasen einer magerlauffähigen Brennkraftmaschine
US7831378B2 (en) * 2007-10-30 2010-11-09 Cummins Inc. System and method for estimating NOx produced by an internal combustion engine
KR100999611B1 (ko) 2007-12-14 2010-12-08 현대자동차주식회사 선택적 촉매 환원 장치 내의 암모니아 흡장량 계산 방법
US8776498B2 (en) 2008-04-16 2014-07-15 Ford Global Technologies, Llc Air-injection system to improve effectiveness of selective catalytic reduction catalyst for gasoline engines
US8506893B2 (en) * 2008-04-23 2013-08-13 Ford Global Technologies, Llc Selective catalytic reduction catalyst system with expanded temperature window
US8141340B2 (en) * 2008-04-30 2012-03-27 Cummins Ip, Inc Apparatus, system, and method for determining the degradation of an SCR catalyst
US8281572B2 (en) * 2008-04-30 2012-10-09 Cummins Ip, Inc. Apparatus, system, and method for reducing NOx emissions from an engine system
US8161730B2 (en) * 2008-04-30 2012-04-24 Cummins Ip, Inc. Apparatus, system, and method for reducing NOx emissions on an SCR catalyst
US8505278B2 (en) * 2009-04-30 2013-08-13 Cummins Ip, Inc. Engine system properties controller
US8256208B2 (en) * 2008-04-30 2012-09-04 Cummins Ip, Inc. Apparatus, system, and method for reducing NOx emissions on an SCR catalyst
US8201394B2 (en) * 2008-04-30 2012-06-19 Cummins Ip, Inc. Apparatus, system, and method for NOx signal correction in feedback controls of an SCR system
US8181450B2 (en) * 2008-04-30 2012-05-22 Cummins IP. Inc. Apparatus, system, and method for reducing NOx emissions on an SCR catalyst using ammonia storage and slip control
JP4726926B2 (ja) 2008-05-22 2011-07-20 株式会社デンソー 内燃機関の排気浄化装置
JP4658267B2 (ja) 2008-05-26 2011-03-23 株式会社日本自動車部品総合研究所 内燃機関の排気浄化装置
JP4598843B2 (ja) 2008-06-03 2010-12-15 株式会社日本自動車部品総合研究所 内燃機関の排気浄化装置
DE102008036418B4 (de) * 2008-08-05 2010-04-29 Continental Automotive Gmbh Verfahren und Vorrichtung zum Steuern einer Abgasnachbehandlung
DE102008036884A1 (de) 2008-08-07 2010-02-11 Daimler Ag Verfahren zum Betreiben einer Abgasreinigungsanlage mit einem SCR-Katalysator
DE102008036885A1 (de) 2008-08-07 2010-02-11 Daimler Ag Verfahren zum Betreiben einer Abgasreinigungsanlage mit einem SCR-Katalysator
JP5165500B2 (ja) * 2008-08-26 2013-03-21 デルファイ・テクノロジーズ・ホールディング・エス．アー．エール．エル． 選択的触媒還元制御システム及び方法
US8596042B2 (en) 2008-08-28 2013-12-03 Delphi International Operations Luxembourg S.A.R.L. System and method for selective catalytic reduction control
JP5115439B2 (ja) * 2008-10-03 2013-01-09 トヨタ自動車株式会社 車両の運転制御装置
JP5093062B2 (ja) * 2008-11-11 2012-12-05 三菱自動車工業株式会社 内燃機関の排気浄化装置
KR101048125B1 (ko) * 2008-11-14 2011-07-08 현대자동차주식회사 차량의 요소 분사량 제어장치 및 방법
JP5262640B2 (ja) * 2008-12-03 2013-08-14 トヨタ自動車株式会社 内燃機関の排気浄化装置
US8356471B2 (en) * 2008-12-05 2013-01-22 Cummins Ip, Inc. Apparatus, system, and method for controlling reductant dosing in an SCR catalyst system
US8225595B2 (en) * 2008-12-05 2012-07-24 Cummins Ip, Inc. Apparatus, system, and method for estimating an NOx conversion efficiency of a selective catalytic reduction catalyst
JP5232613B2 (ja) * 2008-12-08 2013-07-10 三菱重工業株式会社 排ガス浄化装置
JP4729631B2 (ja) 2009-03-11 2011-07-20 トヨタ自動車株式会社 内燃機関の排気浄化装置
JP4874364B2 (ja) 2009-04-14 2012-02-15 株式会社日本自動車部品総合研究所 内燃機関の排気浄化装置
EP2431584B1 (en) * 2009-05-07 2015-09-23 Toyota Jidosha Kabushiki Kaisha Exhaust gas purifying device for internal combustion engine
JP5398372B2 (ja) * 2009-06-18 2014-01-29 Ｕｄトラックス株式会社 エンジンの排気浄化装置
US8516798B2 (en) * 2009-07-30 2013-08-27 Ford Global Technologies, Llc Methods and systems for control of an emission system with more than one SCR region
US8240194B2 (en) * 2009-07-30 2012-08-14 Ford Global Technologies, Llc Methods and systems for diagnostics of an emission system with more than one SCR region
US8491845B2 (en) * 2009-09-10 2013-07-23 Cummins Ip, Inc. Low temperature selective catalytic reduction catalyst and associated systems and methods
JP5404320B2 (ja) * 2009-10-30 2014-01-29 三菱重工業株式会社 内燃機関のＮＯｘ浄化装置
KR101500350B1 (ko) * 2009-12-03 2015-03-09 현대자동차 주식회사 ＮＯｘ 센서 미작동 구간에서의 암모니아 분사 방법
DE102010005428A1 (de) 2010-01-22 2011-07-28 Daimler AG, 70327 Verfahren zum Betreiben einer Abgasreinigungsanlage mit einem SCR-Katalysator
US8584444B2 (en) * 2010-02-09 2013-11-19 General Electric Company Model-based controls for selective catalyst reduction system
JP5119289B2 (ja) * 2010-04-06 2013-01-16 トヨタ自動車株式会社 内燃機関の排気浄化装置
US8733083B2 (en) 2010-04-26 2014-05-27 Cummins Filtration Ip, Inc. SCR catalyst ammonia surface coverage estimation and control
US10094369B2 (en) * 2010-04-30 2018-10-09 Plastic Omnium Advanced Innovation And Research Process for transferring a liquid using a pump
US8640448B2 (en) * 2010-05-03 2014-02-04 Cummins Inc. Transient compensation control of an SCR aftertreatment system
US9038373B2 (en) 2010-05-03 2015-05-26 Cummins Inc. Ammonia sensor control of an SCR aftertreatment system
US9476338B2 (en) 2010-05-03 2016-10-25 Cummins Inc. Ammonia sensor control, with NOx feedback, of an SCR aftertreatment system
CN102510935B (zh) * 2010-05-14 2014-04-30 丰田自动车株式会社 内燃机的排气净化装置
JP5002040B2 (ja) * 2010-07-07 2012-08-15 トヨタ自動車株式会社 内燃機関の排気浄化装置
JP5677787B2 (ja) * 2010-08-31 2015-02-25 新日鉄住金エンジニアリング株式会社 脱硝制御装置及び脱硝制御方法
JP5627367B2 (ja) 2010-09-22 2014-11-19 トヨタ自動車株式会社 排気浄化装置及び排気浄化装置の制御方法
WO2012129179A1 (en) 2011-03-18 2012-09-27 Cummins Inc. A method and apparatus to control selective catalytic reduction systems in feedback
US8281578B2 (en) * 2011-03-24 2012-10-09 Ford Global Technologies, Llc Method for correcting an estimate of NH3 stored within a selective catalyst reduction system
US8800274B2 (en) * 2011-05-12 2014-08-12 GM Global Technology Operations LLC Method for managing ammonia slip
CN104395571B (zh) 2012-06-20 2017-06-23 丰田自动车株式会社 内燃机的排气净化系统
CN104379891B (zh) * 2012-06-20 2017-03-08 丰田自动车株式会社 内燃机的排气净化装置
JP2014005742A (ja) 2012-06-21 2014-01-16 Denso Corp 内燃機関の排気浄化装置
US20140123629A1 (en) * 2012-11-02 2014-05-08 International Engine Intellectual Property Company, Llc Ammonia slip detection
US20150322836A1 (en) 2012-12-18 2015-11-12 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification apparatus for internal combustion engine
JP5842805B2 (ja) * 2012-12-28 2016-01-13 株式会社デンソー 尿素水添加制御装置
JP6206065B2 (ja) 2013-10-08 2017-10-04 いすゞ自動車株式会社 排気浄化システム
US9238984B2 (en) * 2014-02-03 2016-01-19 Caterpillar, Inc. Exhaust emission prediction system and method
JP6287539B2 (ja) 2014-04-24 2018-03-07 いすゞ自動車株式会社 排気浄化システム
JP6090257B2 (ja) * 2014-08-07 2017-03-08 トヨタ自動車株式会社 内燃機関の排気浄化装置
JP2015135117A (ja) * 2015-03-06 2015-07-27 ボルボ ラストバグナー アーベー 排気ガス後処理デバイス内の還元剤貯蔵・レベルをコントロールするための方法
US9726064B2 (en) 2015-04-30 2017-08-08 Faurecia Emissions Control Technologies, Usa, Llc Mixer for use in a vehicle exhaust system
JP6269614B2 (ja) * 2015-08-06 2018-01-31 トヨタ自動車株式会社 内燃機関の排気浄化装置
JP6288051B2 (ja) * 2015-11-25 2018-03-07 トヨタ自動車株式会社 アンモニア吸着量推定装置、アンモニア吸着量推定方法、および内燃機関の排気浄化システム
JP6759687B2 (ja) * 2016-05-02 2020-09-23 いすゞ自動車株式会社 内燃機関の排気ガス浄化システム及び内燃機関の排気ガス浄化方法
JP6818884B2 (ja) 2016-10-21 2021-01-20 フォルシア エミッションズ コントロール テクノロジーズ ユーエスエー エルエルシー 還元剤混合装置
US10787946B2 (en) 2018-09-19 2020-09-29 Faurecia Emissions Control Technologies, Usa, Llc Heated dosing mixer
US11867111B2 (en) 2019-05-09 2024-01-09 Cummins Emission Solutions Inc. Valve arrangement for split-flow close-coupled catalyst
KR102348619B1 (ko) * 2019-12-30 2022-01-07 고등기술연구원연구조합 선택적 촉매환원 학습 시스템 및 선택적 촉매환원 학습 방법
US11732628B1 (en) 2020-08-12 2023-08-22 Old World Industries, Llc Diesel exhaust fluid

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60197225A (ja) * 1984-03-19 1985-10-05 Mitsubishi Heavy Ind Ltd 有触媒脱硝装置
JPH01288320A (ja) * 1988-05-17 1989-11-20 Niigata Eng Co Ltd アンモニア脱硝装置の制御方法
DE4117143C2 (de) * 1991-05-25 1995-04-20 Daimler Benz Ag Verfahren zur selektiven katalytischen Reduktion von Stickoxiden in Abgasen aus Kraftfahrzeugdieselmotoren
DE4217552C1 (zh) * 1992-05-27 1993-08-19 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
EP0617199B1 (de) * 1993-03-26 1996-01-31 Siemens Aktiengesellschaft Katalysator zur Stickoxidminderung im Abgas eines Verbrennungsmotors
DE4315278A1 (de) * 1993-05-07 1994-11-10 Siemens Ag Verfahren und Einrichtung zur Dosierung eines Reduktionsmittels in ein stickoxidhaltiges Abgas
ES2119944T3 (es) * 1993-11-04 1998-10-16 Siemens Ag Procedimiento y dispositivo para la dosificacion de un reactivo en un medio fluido.
DE19736384A1 (de) * 1997-08-21 1999-02-25 Man Nutzfahrzeuge Ag Verfahren zur Dosierung eines Reduktionsmittels in stickoxidhaltiges Abgas einer Brennkraftmaschine
GB9808876D0 (en) * 1998-04-28 1998-06-24 Johnson Matthey Plc Combatting air pollution
DE19843960A1 (de) * 1998-09-24 2000-03-30 Siemens Ag Verfahren und Vorrichtung zur katalytischen Verringerung des Schadstoffgehalts im Abgas einer Verbrennungsanlage
EP1033480A1 (de) * 1999-02-17 2000-09-06 Man Nutzfahrzeuge Ag Verfahren zur Dosierung eines Reduktionsmittels in stickoxidhaltiges Abgas einer Brennkraftmaschine
US6427439B1 (en) * 2000-07-13 2002-08-06 Ford Global Technologies, Inc. Method and system for NOx reduction
US6546720B2 (en) * 2001-09-04 2003-04-15 Ford Global Technologies, Inc. Method and apparatus for controlling the amount of reactant to be added to a substance using a sensor which is responsive to both the reactant and the substance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105804841A (zh) * 2014-09-17 2016-07-27 现代自动车株式会社 控制吸附在催化器中氨量的方法及使用该方法的排放系统
CN105804841B (zh) * 2014-09-17 2019-08-09 现代自动车株式会社 控制吸附在催化器中氨量的方法及使用该方法的排放系统

Also Published As

Publication number Publication date
EP1348477A1 (en) 2003-10-01
KR20030078622A (ko) 2003-10-08
CN1448620A (zh) 2003-10-15
US20030182935A1 (en) 2003-10-02
US6755014B2 (en) 2004-06-29
EP1348477B1 (en) 2005-04-20
JP3951774B2 (ja) 2007-08-01
DE60203781D1 (de) 2005-05-25
KR100490813B1 (ko) 2005-05-24
DE60203781T2 (de) 2005-09-29
JP2003293737A (ja) 2003-10-15

Similar Documents

Publication Publication Date Title
CN1267627C (zh) 内燃机的NOx清除设备和NOx清除方法
CN102037230B (zh) NOx传感器的异常诊断装置及异常诊断方法
JP3979153B2 (ja) 内燃機関のＮＯｘ浄化装置
JP4692911B2 (ja) ＮＯｘセンサの出力較正装置及び出力較正方法
WO2012038807A1 (en) Exhaust gas control apparatus and control method for exhaust gas control apparatus
US20060086080A1 (en) Engine exhaust gas cleaning method and system
KR101542976B1 (ko) 선택적 환원 촉매의 반응 모델을 위한 보정 로직을 결정하는 방법, 선택적 환원 촉매의 반응 모델의 파라미터를 보정하는 방법 및 이를 이용한 배기 장치
US20090104085A1 (en) Reducing agent spray control system ensuring operation efficiency
KR101416410B1 (ko) 차량의 요소수 분사 제어장치 및 방법
CN1873195A (zh) 利用温度传感器的废气处理诊断法
US10443471B2 (en) Selective catalytic reduction dosing control
US10378463B2 (en) Selective catalytic reduction steady state ammonia slip detection
EP3110531B1 (en) Exhaust throttle control for aftertreatment system thermal management
JP5398372B2 (ja) エンジンの排気浄化装置
CN102889108A (zh) 压燃点火发动机的废气后处理系统
JP2003301737A (ja) 内燃機関のＮＯｘ浄化装置
JP3956738B2 (ja) 内燃機関のＮＯｘ浄化装置
US20150218992A1 (en) Targeted regeneration of a catalyst in an aftertreatment system
CN109154223B (zh) 内燃机的排气气体净化系统及内燃机的排气气体净化方法
US8020375B2 (en) Exhaust gas purification system for internal combustion engine
JP2003293738A (ja) 内燃機関のＮＯｘ浄化装置
US10738678B2 (en) Correction method of NOx purifying efficiency of SDPF
KR102554597B1 (ko) 배기 가스 내의 암모니아 슬립 감지 방법 및 이를 수행하기 위한 장치
JP2006057575A (ja) 排気浄化装置の制御方法
JP2021046834A (ja) 排気浄化装置の制御装置、及び制御方法

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
ASS Succession or assignment of patent right

Owner name: MITSUBISHI FUSO TRUCK AND BUS CORPORATION

Free format text: FORMER OWNER: MITSUBISHI JIDOSHI KOGYO K.K.

Effective date: 20040611

C41 Transfer of patent application or patent right or utility model
TA01 Transfer of patent application right

Effective date of registration: 20040611

Address after: Tokyo, Japan

Applicant after: MITSUBISHI FUSO TRUCK AND BUS Corp.

Address before: Tokyo, Japan

Applicant before: MITSUBISHI JIDOSHA KOGYO Kabushiki Kaisha

C14 Grant of patent or utility model
GR01 Patent grant
CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20060802