CN101589215A - 通过粒子过滤器对确定的压力差值进行似真度检验的方法 - Google Patents

通过粒子过滤器对确定的压力差值进行似真度检验的方法 Download PDF

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CN101589215A
CN101589215A CNA2008800027488A CN200880002748A CN101589215A CN 101589215 A CN101589215 A CN 101589215A CN A2008800027488 A CNA2008800027488 A CN A2008800027488A CN 200880002748 A CN200880002748 A CN 200880002748A CN 101589215 A CN101589215 A CN 101589215A
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pressure difference
difference value
pressure
particle filter
combustion engine
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CN101589215B (zh
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H·利尼曼
T·兹里利
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Vitesco Technologies GmbH
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    • 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
    • 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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • 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
    • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
    • F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
    • 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
    • F02D41/1448—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 exhaust gas pressure
    • 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
    • F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • 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
    • F02D2200/0406—Intake manifold pressure
    • 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
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0812—Particle filter loading
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

本发明涉及一种用于通过粒子过滤器对压力差值进行似真度检验的方法。对此把压力差值分配给内燃机的每个充气压力。其中，当确定的压力差值位于确定的充气压力值的界限范围之外时，那么就识别出有错误的压力差值。

Description

通过粒子过滤器对确定的压力差值进行似真度检验的方法
根据主权利要求1的前序部分的特征，本发明涉及一种通过粒子过滤器(Partikelfilter)对确定的压力差值进行似真度检验(Plausibilisierung)的方法。
在柴油机中可以将粒子过滤器用于减少烟尘排放。其中，当粒子过滤器被烟尘填充到确定的界限时，那么就必须实施粒子过滤器的再生，这是为了抢先处理带有伴随的废气反压力和在过滤器中的烟尘的未受控制的燃烧的危险的粒子过滤器的阻塞。
为了能够测量带有烟尘的粒子过滤器的阻塞而应用压力差传感器。这个压力差传感器测量粒子过滤器的两端之间的压力差。高的压力差值指出粒子过滤器的高的阻塞，而低的压力差值不如说是对于空的粒子过滤器的标志。然后，以压力差值和各自的发动机正常工作点为基础可以计算粒子过滤器的负载值。然后可以另外将负载值用于评估再生的效率，并且如果必要的话可以采取更多的措施。
由于从立法者方面预先给予了每个直接或间接实施与排放相关的功能的元件的功能性的监测，那么就必须实现压力差值的质量的连续监测。假如压力差值的质量变差，则每次确定的压力差值的质量也就自动地变差。变差的压力差值尤其可以导致，太经常或太稀少地再生粒子过滤器。在太经常的再生中增加燃料消耗，而太稀少的再生可以导致行驶性能和排放性能的损害。
本发明基于以下任务，即对确定的压力差值实施尽可能简单且快速的似真度检验。
根据本发明通过专利权利要求1的特征解决这个任务。本发明的优选的设计在从属权利要求中表征。
用本发明实现的优点尤其在于，通过对内燃机充气压力值(Ladedruckwerte)的观察来对压力差值进行似真度检验比直接在压力差传感器处进行压力差值的似真度检验更容易，并且输送更精确的结果。因此，本发明输送更精确的并且相对容易的、关于压力差值的质量的可测量的数据。
利用附图更进一步阐明本发明的细节。其中：
图1显示了：用于对压力差值进行似真度检验的方框图，以及
图2显示了：在内燃机的充气压力与粒子过滤器之上的压力差之间的相关性。
图1显示了用于对粒子过滤器3上的压力差值进行似真度检验的方框图。对此，在内燃机1的排出部分(Auslasstrakt)2中设置粒子过滤器3。此外，该装置具有压力差传感器，该压力差传感器把确定的压力差Δp发送给控制单元4。其中，该压力差值Δp与进入粒子过滤器3之前的废气的压力p_v和离开粒子过滤器3之后的废气的压力p_n之间的压力差Δp相符。该控制单元4附加地接收连续的信号p_L，该信号与内燃机的充气压力相符。
接下来更进一步阐明用于对压力差值Δp进行似真度检验的方法。在控制器4中存放特性曲线，其中，依赖于内燃机的运行状态来将充气压力值p_L分配给每个压力差值Δp。根据实验在一定条件下确定这种分配，即确保在粒子过滤器3中没有形成烟尘。当压力差值Δp位于压力差(该压力差分配给确定的充气压力值)周围的、可预先给予的上限范围和下限范围之外的情况下时，那么就相应地在控制器4中对压力差值Δp进行似真度检验，这通过识别有错误的压力差值Δp实现。其中，上限范围和下限范围与压力差传感器的公差范围相符，确定的压力差值可以在公差范围内摆动，而不会把该压力差值识别为错误的。
在对内燃机的确定的充气压力进行似真度检验之后在压力差传感器处对确定的压力差值进行似真度检验。只有这样才可以确保进行该压力差值的正确且精确的似真度检验。
图2显示了：内燃机的充气压力p_L与粒子过滤器上的压力差之间的相关性。其中，横坐标表示内燃机的充气压力，而纵坐标表示粒子过滤器上的压力差值Δp。在这种情况下描述了对于内燃机的已定义的运行状态的压力差值Δp和充气压力值p_L的线性相关性。但是在两个压力值之间的完全不同的相关性也是可以想象的。其中，该线性相关性位于界限范围之内，该界限范围是通过可预先给予的上限OL和可预先给予的下限UL确定的。其中，上限范围和下限范围还表示公差范围，压力差值允许在该公差范围之内，而不会被识别为有错误的压力值信号。
在所考虑的情况下确定内燃机的充气压力L_g。这个充气压力L_g基于实验上确定的特性曲线确定界限范围，确定的压力差值必须在该界限范围之内。其中，以存放在控制器中的特性曲线为基础，把压力差值pm分配给此处所考虑情况下的充气压力。该界限范围是通过压力差值pm周围的、可预先给予的上限OL和可预先给予的下限UL确定的。那么在压力差传感器上确定的压力差值Δpl必须位于通过界限值po和pu定义的压力范围之内，以便压力差值不会识别为错误的。在当前的情况下该压力差值Δpl位于通过界限值po和pu限制的范围之外。因此，该压力差值Δpl通过控制单元识别为错误的，并且采取进一步的措施。

Claims (3)

1.一种用于对压力差进行似真度评估的方法，该压力差出现在粒子过滤器的两端之间，该粒子过滤器位于内燃机的排出部分中，该方法是通过使用第一测量单元和第二测量单元，该第一测量单元用于确定压力差值，该第二测量单元确定内燃机的充气压力，其特征在于，将内燃机的充气压力值分配给每个压力差值，以及把两个特征值存储在特性曲线中，并且当测量的压力差值位于分别分配给内燃机的确定的充气压力并且被存储的压力差值的可预先给予的上限范围和下限范围之外时，就识别为有错误的压力差值。
2.根据权利要求1所述的方法，其特征在于，在对确定的压力差传感器进行似真度检验之前，对内燃机的确定的压力差进行似真度检验。
3.根据先前权利要求中任一所述的方法，其特征在于，线性相关性存在于确定的压力差值和确定的充气压力之间。
CN2008800027488A 2007-01-22 2008-01-21 通过粒子过滤器对确定的压力差值进行似真度检验的方法 Active CN101589215B (zh)

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DE102007003153A DE102007003153B4 (de) 2007-01-22 2007-01-22 Verfahren zur Plausibilisierung eines ermittelten Differenzdruckwerts über einen Partikelfilter
PCT/EP2008/050645 WO2008090125A1 (de) 2007-01-22 2008-01-21 Verfahren zur plausibilisierung eines ermittelten differenzdruckwerts über einen partikelfilter

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CN101589215B (zh) 2012-11-14
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WO2008090125A1 (de) 2008-07-31
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