EP1581734B1 - Verfahren und vorrichtung zur diagnose der dynamischen eigenschaften einer zur zylinderindividuellen lambdaregelung verwendeten lambdasonde - Google Patents

Verfahren und vorrichtung zur diagnose der dynamischen eigenschaften einer zur zylinderindividuellen lambdaregelung verwendeten lambdasonde Download PDF

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Publication number
EP1581734B1
EP1581734B1 EP03799439A EP03799439A EP1581734B1 EP 1581734 B1 EP1581734 B1 EP 1581734B1 EP 03799439 A EP03799439 A EP 03799439A EP 03799439 A EP03799439 A EP 03799439A EP 1581734 B1 EP1581734 B1 EP 1581734B1
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EP
European Patent Office
Prior art keywords
lambda
cylinder
value
controllers
control
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
EP03799439A
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German (de)
English (en)
French (fr)
Other versions
EP1581734A1 (de
Inventor
Andreas Koring
Ruediger Deibert
Michael Daetz
Eberhard Schnaibel
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.)
Robert Bosch GmbH
Volkswagen AG
Original Assignee
Robert Bosch GmbH
Volkswagen AG
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Publication date
Application filed by Robert Bosch GmbH, Volkswagen AG filed Critical Robert Bosch GmbH
Publication of EP1581734A1 publication Critical patent/EP1581734A1/de
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Publication of EP1581734B1 publication Critical patent/EP1581734B1/de
Anticipated expiration legal-status Critical
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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
    • F02D41/008—Controlling each cylinder individually
    • 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
    • F02D41/1493—Details
    • F02D41/1495—Detection of abnormalities in the air/fuel ratio feedback system

Definitions

  • the invention relates to a method and a device for diagnosing the dynamic properties of lambda probes with regard to a single-cylinder lambda control according to the preambles of the respective independent claims.
  • a lambda control in conjunction with a catalytic converter, is today the most effective emission control method for the gasoline engine. Only in combination with currently available ignition and injection systems can very low Exhaust gas values can be achieved. Legislators in most countries even impose limits on engine exhaust emissions.
  • the respective exhaust gas is basically measured and the supplied fuel quantity is corrected immediately, for example, by means of the injection system in accordance with the measurement result.
  • the dynamic properties of a lambda probe when new are usually sufficient in a selected operating range. If, however, the dynamic properties of the probe change in such a way that cylinder-specific lambda values can not be resolved, since the response times of the probe increase, the lambda control does not act in an intermeshing manner, although lambda fluctuations are actually present in the exhaust gas. Causes of reduced probe dynamics are, for example.
  • the present invention has for its object to provide a method and an apparatus of the type mentioned, which allows a reliable diagnosis of the dynamic properties of a lambda probe with respect to single cylinder lambda control.
  • the inventive method provides, in particular, to detect at least one manipulated variable of the lambda control and to compare it with a predefinable maximum threshold and in case of exceeding the maximum threshold, the dynamic behavior of the lambda probe in With regard to the suitability for the cylinder-specific lambda control as insufficient to assess.
  • the dynamic properties of the lambda probe are detected in a first variant according to the invention by means of the single cylinder control itself. It is based on the idea that the operation of individual cylinder-individual controller diverges with insufficient dynamic properties and the associated control variables, namely one or more manipulated variables, exceed a predetermined maximum threshold.
  • the dynamic behavior of the lambda probe is determined by means of a test function, i. by means of an introduced disturbance or detuning of the current lambda value.
  • the test function can be performed once, temporarily periodically or event-controlled.
  • the predefinable maximum threshold for a cylinder-specific controller can be exceeded, for example, when the controller is active and the value of the respective manipulated variable exceeds the predefinable amount or the manipulated variable can not be increased at all due to its structure.
  • the dynamic properties of the lambda probe in terms of usability for the Single cylinder lambda control considered insufficient.
  • the invention further relates to a diagnostic device which operates according to the inventive method.
  • the diagnostic routine described below with reference to the figure for detecting the usability or non-operational capability of a lambda probe of a spark-ignition engine is preferably carried out only during the time in which an individual regulator having individual cylinder control is active.
  • the test function described below is executed once or several times and the results of the tests are evaluated only as long as the test function is active.
  • step 30 it is determined in step 30 whether the engine is running is at all in a suitable for the single-cylinder control and thus for the detection of the dynamic properties of the lambda probe operating condition. If this is not the case, the program jumps back to the beginning of the routine in the form of a loop. Otherwise, the manipulated variables of the individual controllers are monitored 40 and after detecting the manipulated variables is further checked 50 whether at least one of the manipulated variables in amount exceeds a predetermined maximum threshold. If this is not the case, the system jumps back to step 40, possibly including a delay stage 60.
  • a next step 70 it is checked whether there is a suitable time for activating the test function. If this is to be answered in the negative, this test 70 is repeated in a loop, also possibly including a delay stage.
  • test routine begins with the fact that the currently present values of the manipulated variables of the individual controllers are temporarily stored 80. Thereafter, a disturbance is made to the currently determined lambda values switched on 90 and the manipulated variables of each controller observed or detected 100.
  • the dynamic properties of the lambda probe with respect to the individual cylinder control are therefore determined with the aid of the controller function itself and / or the described active test function.
  • the lambda of a cylinder is targeted by varying the cylinder-specific fuel measurement by a predefined amount x tune.
  • this cylinder trimming must be shown as an additional offset with about the same amount as the trim in the associated cylinder-specific control variable of the single cylinder control. If the resulting manipulated variable change is only a portion y of the stimulated cylinder trim, this means that the lambda probe can no longer fully follow the cylinder-specific fluctuations due to reduced dynamics. If the proportion y falls below a predefinable threshold z, ie an exhaust-relevant residual error x - z can no longer be corrected, an error signal must be output. The resulting exhaust disadvantage is not relevant in this case.
  • the invention can be implemented either as hardware or in the form of a control program as part of the engine control.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Testing Of Engines (AREA)
EP03799439A 2002-12-23 2003-12-19 Verfahren und vorrichtung zur diagnose der dynamischen eigenschaften einer zur zylinderindividuellen lambdaregelung verwendeten lambdasonde Expired - Lifetime EP1581734B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10260721 2002-12-23
DE10260721A DE10260721A1 (de) 2002-12-23 2002-12-23 Verfahren und Vorrichtung zur Diagnose der dynamischen Eigenschaften einer zur zylinderindividuellen Lambdaregelung verwendeten Lambdasonde
PCT/DE2003/004250 WO2004059152A1 (de) 2002-12-23 2003-12-19 Verfahren und vorrichtung zur diagnose der dynamischen eigenschaften einer zur zylinderindividuellen lambdaregelung verwendeten lambdasonde

Publications (2)

Publication Number Publication Date
EP1581734A1 EP1581734A1 (de) 2005-10-05
EP1581734B1 true EP1581734B1 (de) 2008-03-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03799439A Expired - Lifetime EP1581734B1 (de) 2002-12-23 2003-12-19 Verfahren und vorrichtung zur diagnose der dynamischen eigenschaften einer zur zylinderindividuellen lambdaregelung verwendeten lambdasonde

Country Status (6)

Country Link
US (1) US7481104B2 (ja)
EP (1) EP1581734B1 (ja)
JP (1) JP4369872B2 (ja)
CN (1) CN100449130C (ja)
DE (2) DE10260721A1 (ja)
WO (1) WO2004059152A1 (ja)

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DE102005027990B4 (de) * 2005-06-17 2007-05-10 Audi Ag Vorrichtung zur dynamischen Überprüfung einer Abgassonde
DE102005045932A1 (de) 2005-09-26 2007-03-29 Robert Bosch Gmbh Gerät und Verfahren zur Diagnose einer technischen Vorrichtung
DE102006061117B3 (de) * 2006-12-22 2007-08-02 Audi Ag Verfahren zur Phasenadaption einer zylinderselektiven Lambdaregelung bei einer mehrzylindrigen Brennkraftmaschine
DE102007042086B4 (de) * 2007-09-05 2014-12-24 Continental Automotive Gmbh Testverfahren für eine Abgassonde einer Brennkraftmaschine, insbesondere für eine Lambda-Sonde
DE102007045984A1 (de) 2007-09-26 2009-04-02 Continental Automotive Gmbh Verfahren zur Ermittlung der dynamischen Eigenschaften eines Abgassensors einer Brennkraftmaschine
DE102008001569B4 (de) 2008-04-04 2021-03-18 Robert Bosch Gmbh Verfahren und Vorrichtung zur Adaption eines Dynamikmodells einer Abgassonde
DE102008001213A1 (de) 2008-04-16 2009-10-22 Robert Bosch Gmbh Verfahren und Vorrichtung zur Diagnose der Dynamik eines Abgassensors
DE102008001579A1 (de) 2008-05-06 2009-11-12 Robert Bosch Gmbh Verfahren und Vorrichtung zur Diagnose der Dynamik einer Breitband-Lambdasonde
DE102008042549B4 (de) 2008-10-01 2018-03-22 Robert Bosch Gmbh Verfahren und Vorrichtung zur Diagnose einer Abgassonde
DE102008058008B3 (de) 2008-11-19 2010-02-18 Continental Automotive Gmbh Vorrichtung zum Betreiben einer Brennkraftmaschine
DE102009045376A1 (de) 2009-10-06 2011-04-07 Robert Bosch Gmbh Verfahren und Vorrichtung zur Diagnose der Dynamik eines Abgassensors
DE102009047648B4 (de) * 2009-12-08 2022-03-03 Robert Bosch Gmbh Verfahren und Vorrichtung zur Diagnose von Abweichungen bei einer Einzelzylinder-Lambdaregelung
DE102009054935B4 (de) 2009-12-18 2022-03-10 Robert Bosch Gmbh Verfahren und Vorrichtung zur Diagnose der Dynamik eines Abgassensors
DE102011002782B3 (de) * 2011-01-17 2012-06-21 Continental Automotive Gmbh Vefahren und Vorrichtung zum Betreiben einer Brennkraftmaschine
US8499624B1 (en) * 2012-02-16 2013-08-06 Delphi Technologies, Inc. Method to determine performance characteristic of an engine exhaust system
DE102013216223A1 (de) * 2013-08-15 2015-02-19 Robert Bosch Gmbh Universell einsetzbare Steuer- und Auswerteeinheit insbesondere zum Betrieb einer Lambdasonde
DE102014208585A1 (de) 2014-05-07 2015-11-12 Continental Automotive Gmbh Vorrichtung zum Betreiben einer Brennkraftmaschine
DE102014216844B3 (de) * 2014-08-25 2015-10-22 Continental Automotive Gmbh Vorrichtung zum Betreiben einer Brennkraftmaschine
DE102019100577B3 (de) 2019-01-11 2019-12-19 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Überwachung von Sensorsignalen und quantitative Ermittlung des stöchiometrischen Kraftstoff-Luftverhältnisses des gefahrenen Kraftstoffs mittels Injektortest und Katalysatordiagnose in einem Fahrzeug

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DE4140618A1 (de) * 1991-12-10 1993-06-17 Bosch Gmbh Robert Verfahren und vorrichtung zur ermittlung der konvertierungsfaehigkeit eines katalysators
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Also Published As

Publication number Publication date
CN100449130C (zh) 2009-01-07
DE10260721A1 (de) 2004-07-29
US7481104B2 (en) 2009-01-27
US20060170538A1 (en) 2006-08-03
EP1581734A1 (de) 2005-10-05
JP2006511752A (ja) 2006-04-06
DE50309504D1 (de) 2008-05-08
WO2004059152A1 (de) 2004-07-15
CN1692218A (zh) 2005-11-02
JP4369872B2 (ja) 2009-11-25

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