CN102477888A - 废气的后处理方法 - Google Patents

废气的后处理方法 Download PDF

Info

Publication number
CN102477888A
CN102477888A CN2011101890168A CN201110189016A CN102477888A CN 102477888 A CN102477888 A CN 102477888A CN 2011101890168 A CN2011101890168 A CN 2011101890168A CN 201110189016 A CN201110189016 A CN 201110189016A CN 102477888 A CN102477888 A CN 102477888A
Authority
CN
China
Prior art keywords
waste gas
temperature
rapid heating
logical process
post
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.)
Granted
Application number
CN2011101890168A
Other languages
English (en)
Other versions
CN102477888B (zh
Inventor
权纯亨
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.)
Hyundai Motor Co
Original Assignee
Hyundai Motor Co
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 Hyundai Motor Co filed Critical Hyundai Motor Co
Publication of CN102477888A publication Critical patent/CN102477888A/zh
Application granted granted Critical
Publication of CN102477888B publication Critical patent/CN102477888B/zh
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02D41/1446—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 exhaust temperatures
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • 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
    • F01N3/103—Oxidation catalysts for HC and CO only
    • 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]
    • 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
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0215—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission
    • F02D41/0225—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission in relation with the gear ratio or shift lever position
    • 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
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
    • 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
    • F02D41/1446—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 exhaust temperatures
    • F02D41/1447—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 exhaust temperatures with determination means using an estimation
    • 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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/402—Multiple injections
    • F02D41/405—Multiple injections with post injections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/021—Engine temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0414—Air temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/101—Engine speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
    • F02D2200/501—Vehicle speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
    • F02D2200/703—Atmospheric pressure
    • 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
    • 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
    • Y02T10/40—Engine management systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Materials Engineering (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Testing Of Engines (AREA)

Abstract

本发明公开了一种废气的后处理方法，可以包括：确定行车条件是否包含在用于对快速加热(RHU)逻辑处理的区域内，该快速加热逻辑处理用来对通过排气管路的废气的温度进行快速升高；检测开/关信号，该开/关信号执行或停止所述快速加热逻辑处理；确定用于执行所述快速加热逻辑处理的喷射信号是否被启动；检测用来执行所述快速加热逻辑处理的零件的差错；并且检测所述快速加热逻辑处理期间的废气的温度，并将所检测到的温度与建模值相比较。因此，提前防止了快速加热逻辑处理的故障，以安全地实现快速加热逻辑处理，并且通过差错信号而表示的故障被通知到司机那里，从而改进了车上的诊断功能。

Description

废气的后处理方法
相关申请的交叉引用
本申请要求2010年11月30日提交的韩国专利申请No.10-2010-0120936的优先权，该申请的全部内容结合于此，以用于通过该引用的所有目的。
技术领域
本发明涉及废气的后处理方法，其利用了快速加热(RHU)逻辑处理来对废气的温度进行快速升高，从而启动催化剂来减少包含在废气中的有害材料。
背景技术
在传统的废气净化设备当中，柴油氧化催化剂(DOC)、柴油微粒过滤器(DPF)和选择性催化还原(SCR)单元以预定顺序而沿着排气通道顺序地布置。
发动机的废气按顺序地通过柴油氧化催化剂、柴油微粒过滤器和SCR单元，从而包含在废气中的有害材料得到了消除。
也就是说，柴油微粒过滤器对包含在废气中的微粒物质(PM)进行捕获，柴油氧化催化剂将包含在废气中的一氧化碳和碳氢化合物氧化成二氧化碳，并且SCR单元将包含在废气中的氧化氮还原成氮气。
同时，SCR单元的上游侧的废气温度将高于200℃，从而使得氧化氮与还原剂进行活性反应。然而，由于SCR单元布置在排气通道的后端部分上，SCR单元的前侧的废气温度达到高于200℃则需要比较长的时间。
因此，直到SCR的前侧的废气温度达到200℃，包含在废气中的氧化氮才被还原而被排放到外部。
同时，用于对废气的温度进行快速升高的快速加热(RHU)逻辑处理已经被逐渐应用，从而对催化剂快速加热，并且有必要对用于执行快速加热逻辑处理的行车条件进行确定，并检测其差错。
公开于本发明背景部分的信息仅仅旨在增加对本发明的总体背景的理解，而不应当被视为承认或以任何形式暗示该信息构成已为本领域一般技术人员所公知的现有技术。
发明内容
本发明试图提供一种废气的后处理方法，其具有的优点是执行了快速加热逻辑处理，以用于对废气的温度进行快速升高，并具有了车上诊断功能，以确定所述快速加热逻辑处理是否在正常执行。
所述废气的后处理方法可以包括：确定行车条件是否需要快速加热(RHU)逻辑处理，该快速加热逻辑处理用来对通过排气管路的废气的温度进行快速升高；检测开/关信号，该开/关信号执行或停止所述快速加热逻辑处理；确定用于执行所述快速加热逻辑处理的喷射信号是否被启动；检测用来执行所述快速加热逻辑处理的零件的差错；并且检测所述快速加热逻辑处理期间的废气的温度，并将所检测到的温度与建模值相比较。
所述的废气的后处理方法可以包括：当通过所述快速加热逻辑处理而升高的所述所检测到的温度超出所述建模值的情况下，输出差错信号。
所述的废气的后处理方法可以包括：对所述差错信号进行累加；并且将已累加的值进行存储，并且如果所述已累加的值大于预定值的话，则启动快速加热逻辑警告灯，例如故障指示灯(MIL)。
用来进入到所述快速加热逻辑处理的行车条件以及用来进入到所述快速加热逻辑处理的条件是基于大气压力、车辆速度、发动机速度、进气温度、冷却剂温度、齿轮速度和燃料喷射量来确定的。
如果用来进入到所述快速加热逻辑处理的条件得到满足，则基于所述发动机速度和燃料喷射量来确定用于执行所述快速加热逻辑处理的后喷射量以喷射燃料。
所述零件包括喷射器和温度传感器，该喷射器进行燃料喷射，该温度传感器在检测所述零件的差错的步骤当中检测所述废气的温度。
柴油氧化催化剂、柴油微粒过滤器、给料模块和选择性催化还原单元(SCR)在所述排气管路上顺序地进行布置，其中所述柴油氧化催化剂对包含在所述废气中的有害材料进行氧化；所述柴油微粒过滤器对包含在所述废气中的微粒物质进行过滤；所述给料模块将还原剂喷射到通过排气管路的废气当中；所述选择性催化还原单元利用给料模块喷射的还原剂来对包含在废气中的氧化氮进行氧化/还原。
温度传感器对发动机后侧的温度、柴油氧化催化剂前侧的温度、柴油微粒过滤器的前侧的温度、和选择性催化还原单元的前侧的温度进行检测。
在如上所述的根据本发明的废气的后处理方法中，提前防止了快速加热逻辑处理的故障，以安全地实现快速加热逻辑处理，并且通过差错信号而表示的故障被通知到司机那里，从而改进了车上的诊断功能。
本发明的方法和装置具有其他的特性和优点，这些特性和优点从并入本文中的附图和随后的具体实施方式中将是显而易见的，或者将在并入本文中的附图和随后的具体实施方式中进行详细陈述，这些附图和具体实施方式共同用于解释本发明的特定原理。
附图说明
图1是根据本发明的示例性的废气的后处理系统的示意图。
图2是根据本发明的示例性的废气的后处理方法的示意性流程图。
图3是显示根据本发明的示例性的废气的后处理方法的详细流程图。
图4是显示执行了根据本发明的示例性的快速加热逻辑处理的情形下，废气的温度及其诊断功能的曲线图。
具体实施方式
接下来将具体参考本发明的各个实施例，在附图中和以下的描述中示出了这些实施例的实例。虽然本发明与示例性实施例相结合进行描述，但是应当了解，本说明书并非旨在将本发明限制为那些示例性实施例。相反，本发明旨在不但覆盖这些示例性实施例，而且覆盖可以被包括在由所附权利要求所限定的本发明的精神和范围之内的各种替换、修改、等效形式以及其它实施例。
图1是根据本发明各个实施例的废气的后处理系统的示意图。
参考图1，废气的后处理系统包括发动机100、喷射器110、控制单元120、排气管路130、柴油氧化催化剂140、柴油微粒过滤器150、给料模块160、混合器170、选择性催化还原单元180和温度传感器，该温度传感器可以包括一个或多个传感器，例如T3、T4、T5、T6和/或T7。
喷射器110设在发动机100上，并且喷射器110将燃料喷射在汽缸上，以执行用于快速加热(RHU)的后喷射。
发动机100的废气按顺序地通过排气管路130柴油氧化催化剂140、柴油微粒过滤器150、混合器170和选择性催化还原单元180，从而通过回气管而排放到外部。
温度传感器T6和T7检测流入到柴油氧化催化剂140的废气的温度、流入到柴油微粒过滤器150的废气的温度以及流入到选择性催化还原单元180的废气的温度。
控制单元120利用了发动机100的行车条件和流过排气管路130的废气温度来确定是否要执行快速加热逻辑处理，并且如果满足了用来执行所述快速加热逻辑处理的条件，则通过喷射器110来执行正常的喷射和后喷射。
此外，控制单元120利用发动机100的行车条件和流过排气管路130的废气温度来停止快速加热逻辑处理，或者不起动该快速加热逻辑处理。
图2是根据本发明的各个实施例的废气的后处理方法的示意性流程图，图3是显示根据本发明的各个实施例的废气的后处理方法的详细流程图。
参考图2，在步骤S200中确定被监测的条件是否需要快速加热功能，例如RHU逻辑处理。此处，对行车条件是否保证了快速加热逻辑处理进行确定。
此外，对快速加热功能的监测本身就能够被认为是可以保证执行快速加热功能的逻辑处理的条件。
更加具体而言，在图3的①当中，控制单元120检测大气压力、车辆速度、发动机速度、进气空气温度、冷却剂温度、齿轮速度、燃料喷射量和废气温度(T6或T7)，确定是否将执行快速加热功能，并监测快速加热功能是否正在被执行。
在图2的步骤S210中确定快速加热功能是开还是关，并且在S220中确定是否启动了用来执行快速加热功能的喷射信号。
喷射信号包括操作信号，该操作信号从控制单元120中传送以对喷射器110进行操作，从而执行后喷射。
在步骤S230中检测用于执行快速加热逻辑的零件的差错。参考图3的④，喷射器110和温度传感器(T3至T7)用来执行快速加热，如果喷射器110或者温度传感器(T3至T7)发生故障或者失灵的话，则控制单元120产生用于快速加热的零件的差错信号。
在S240中，在快速加热期间对废气的温度进行检测，被检测的温度与建模温度相比较，并且确定该废气的温度是否处于预定温度区域的范围内。
如果在步骤S250中快速加热功能结束的话，则监测终止，以输出其结果。参考图3的⑤和⑥，通过温度传感器来对废气的温度进行检测，从而对快速加热进行评价。
更加具体而言，如果废气的温度在监测期间超过了预定的温度范围，则产生差错信号，该已产生的差错信号被计数，并且将已被计数的值进行存储。
此外，如果计数的值超过了预定值或者建模值，则确定了快速加热逻辑被非正常地操作，从而启动警告灯，例如故障指示灯(MIL)。
图4是显示执行了根据本发明的示例性的快速加热逻辑处理的情形下，废气的温度及其诊断功能的曲线图。
参考图4，水平轴表示时间，竖直轴表示流入到选择性催化还原单元180的废气的温度。
如图所示，RHU建模温度400的范围通过预定的映射数据而进行了设定，并且流入到选择性催化还原单元180的废气的温度的曲线图在RHU的开启条件下形成。此外，在RHU的关闭条件下形成了废气温度420的曲线图。
此外，通过发动机的行车条件和快速加热逻辑来形成了废气的建模温度430，并且如果温度410超过了建模温度430和预定温度范围400的情况下，则产生差错信号440。
控制单元120对差错信号进行计数，并将计数的值进行存储，并且如果计数的值超过了预定值或者建模值，则启动警告灯(MIL)。
为了方便解释和精确限定所附权利要求，术语“前”或“后”等是用于参考图中显示的这些特征的位置来描述示例性实施方式的特征。
前述对本发明的具体示例性实施方案的描述是为了说明和例证的目的。这些描述并非想穷尽本发明，或者将本发明限定为所公开的精确形式，并且很显然，根据上述教导，可以进行很多改变和变化。对示例性实施例进行选择和描述的目的在于解释本发明的特定原理及其实际应用，从而使得本领域的其它技术人员能够实现并利用本发明的各种不同的示例性实施方案以及各种不同的选择和改变。本发明的范围意在由所附的权利要求书及其等同形式所限定。

Claims (8)

1.一种废气的后处理方法，包括：
确定行车条件是否需要快速加热逻辑处理对通过排气管路的废气的温度进行快速升高；
检测开/关信号，该开/关信号执行或停止所述快速加热逻辑处理；
确定用于执行所述快速加热逻辑处理的喷射信号是否被启动；
检测用来执行所述快速加热逻辑处理的一个或多个零件的差错状态；并且
检测所述快速加热逻辑处理期间的废气的温度，并将所检测到的温度与建模值相比较。
2.如权利要求1所述的废气的后处理方法，还包括：
当通过所述快速加热逻辑处理而升高的所述所检测到的温度与所述建模值不同的时候，输出差错信号。
3.如权利要求2所述的废气的后处理方法，还包括：
对所述差错信号进行累加；并且
将已累加的值进行存储，并且如果所述已累加的值大于预定值的话，则启动快速加热逻辑警告灯。
4.如权利要求1所述的废气的后处理方法，其中用来进入到所述快速加热逻辑处理的行车条件是基于大气压力、车辆速度、发动机速度、进气温度、冷却剂温度、齿轮速度和燃料喷射量来确定的。
5.如权利要求4所述的废气的后处理方法，其中，如果用来进入到所述快速加热逻辑处理的条件得到满足，则基于所述发动机速度和燃料喷射量来确定用于执行所述快速加热逻辑处理的后喷射量以喷射燃料。
6.如权利要求1所述的废气的后处理方法，其中所述零件的其中之一包括喷射器和温度传感器，该喷射器进行燃料喷射，该温度传感器在检测所述零件的差错的步骤当中检测所述废气的温度。
7.如权利要求1所述的废气的后处理方法，其中
柴油氧化催化剂、柴油微粒过滤器、给料模块和选择性催化还原单元在所述排气管路上顺序地进行布置；
所述柴油氧化催化剂对包含在所述废气中的有害材料进行氧化；
所述柴油微粒过滤器对包含在所述废气中的微粒物质进行过滤；
所述给料模块将还原剂喷射到通过排气管路的废气当中；且
所述选择性催化还原单元利用给料模块喷射的还原剂来对包含在废气中的氧化氮进行氧化/还原。
8.如权利要求7所述的废气的后处理方法，其中：
温度传感器对发动机后侧的温度、柴油氧化催化剂前侧的温度、柴油微粒过滤器的前侧的温度和选择性催化还原单元的前侧的温度进行检测。
CN201110189016.8A 2010-11-30 2011-07-01 废气的后处理方法 Expired - Fee Related CN102477888B (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2010-0120936 2010-11-30
KR1020100120936A KR101251515B1 (ko) 2010-11-30 2010-11-30 배기가스 후처리 방법

Publications (2)

Publication Number Publication Date
CN102477888A true CN102477888A (zh) 2012-05-30
CN102477888B CN102477888B (zh) 2016-12-14

Family

ID=

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111852624A (zh) * 2019-04-25 2020-10-30 丰田自动车株式会社 内燃机的排气净化装置
CN112943425A (zh) * 2021-03-10 2021-06-11 一汽解放汽车有限公司 后处理电加热控制系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1291502A2 (en) * 2001-09-07 2003-03-12 Hitachi, Ltd. Diagnosis apparatus for internal combustion engine
WO2007033751A1 (de) * 2005-09-22 2007-03-29 Daimler Ag Verfahren zum betreiben einer brennkraftmaschine
JP2007332932A (ja) * 2006-06-19 2007-12-27 Toyota Motor Corp 内燃機関の異常診断装置
US20100139253A1 (en) * 2008-12-05 2010-06-10 Hyundai Motor Company System for Purifying Exhaust Gas

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1291502A2 (en) * 2001-09-07 2003-03-12 Hitachi, Ltd. Diagnosis apparatus for internal combustion engine
WO2007033751A1 (de) * 2005-09-22 2007-03-29 Daimler Ag Verfahren zum betreiben einer brennkraftmaschine
JP2007332932A (ja) * 2006-06-19 2007-12-27 Toyota Motor Corp 内燃機関の異常診断装置
US20100139253A1 (en) * 2008-12-05 2010-06-10 Hyundai Motor Company System for Purifying Exhaust Gas

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111852624A (zh) * 2019-04-25 2020-10-30 丰田自动车株式会社 内燃机的排气净化装置
CN111852624B (zh) * 2019-04-25 2022-10-11 丰田自动车株式会社 内燃机的排气净化装置
CN112943425A (zh) * 2021-03-10 2021-06-11 一汽解放汽车有限公司 后处理电加热控制系统
CN112943425B (zh) * 2021-03-10 2022-05-20 一汽解放汽车有限公司 后处理电加热控制系统

Also Published As

Publication number Publication date
DE102011051476A1 (de) 2012-05-31
US20120131905A1 (en) 2012-05-31
KR101251515B1 (ko) 2013-04-05
KR20120059265A (ko) 2012-06-08
JP2012117512A (ja) 2012-06-21

Similar Documents

Publication Publication Date Title
JP5680104B2 (ja) 還元剤容器における還元剤の状態を特定するための方法
CN104791119B (zh) 评估NOx传感器响应速率劣化的设备、系统和方法
US20120131905A1 (en) Exhaust gas post processing method
EP2982839B1 (en) Reductant tank sensor diagnostic method and system
US9476341B2 (en) Exhaust treatment system that generates debounce duration for NOx sensor offset
CN109281739B (zh) 一种接线检测方法及检测装置
CN103225534B (zh) 碳烟传感器监测
US9109480B2 (en) Method and system for initiating an engine after-run state and controlling a nitrogen oxide sensor self-diagnostic tool
US9206727B2 (en) Regeneration diagnostic methods and systems
CN104863678A (zh) 检测排气系统中的过热
KR101637758B1 (ko) Scr 시스템의 고장진단방법 및 고장진단장치
CN101802358B (zh) 用于在拥有scr催化器的尾气后处理系统中检测还原剂输入装置的最小开启时间的方法
JP2007332932A (ja) 内燃機関の異常診断装置
CN103670632A (zh) 用于氧化催化剂的车载性能监测的装置和方法
CN102733919A (zh) 氮氧化物传感器范围内粘滞诊断工具
JP5640539B2 (ja) 尿素水品質異常診断装置
US9346014B2 (en) Exhaust gas after-treatment apparatus having improved durability and exhaust gas after-treatment method
US11181022B2 (en) Method and device for monitoring a nitrogen oxide trap
US11008922B2 (en) System and method for diagnosing health of an exhaust aftertreatment system
CN102477888B (zh) 废气的后处理方法
JP6390952B2 (ja) 車両の制御装置
JP5833818B2 (ja) 排気ガス後処理システム及びその制御方法
US9752487B2 (en) Failure detection device for fuel addition valve
JP2010261328A (ja) 還元剤の異常検出方法
KR102586924B1 (ko) 그을음 퇴적기울기 방식 필터재생방법 및 차량 필터보호 시스템

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20161214

Termination date: 20190701

CF01 Termination of patent right due to non-payment of annual fee