EP1187977A2 - Procede d'identification d'un capteur defectueux - Google Patents

Procede d'identification d'un capteur defectueux

Info

Publication number
EP1187977A2
EP1187977A2 EP00993273A EP00993273A EP1187977A2 EP 1187977 A2 EP1187977 A2 EP 1187977A2 EP 00993273 A EP00993273 A EP 00993273A EP 00993273 A EP00993273 A EP 00993273A EP 1187977 A2 EP1187977 A2 EP 1187977A2
Authority
EP
European Patent Office
Prior art keywords
temperature
variable
sensor
disturbance
temperature sensor
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.)
Withdrawn
Application number
EP00993273A
Other languages
German (de)
English (en)
Inventor
Ruediger Weiss
Michael Nicolaou
Ries-Mueller
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
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1187977A2 publication Critical patent/EP1187977A2/fr
Withdrawn legal-status Critical Current

Links

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
    • F02D41/22—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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/14—Indicating devices; Other safety devices
    • F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2031/00—Fail safe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F23N2229/10—Flame sensors comprising application of periodical fuel flow fluctuations
    • 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

Definitions

  • the invention relates to a method for detecting a faulty sensor according to the preamble of main claim 1.
  • Cooling water temperature of the internal combustion engine measured using a temperature sensor and used in the control unit for diagnosis.
  • the measured temperature is compared with a calculated model temperature as the setpoint.
  • the measured temperature is only recognized as false if the measured temperature falls below the model temperature.
  • a failsafe device for a temperature sensor of an internal combustion engine is known, with a diagnostic device for error detection when detecting the coolant temperature of the engine.
  • a temperature sensor failure assessment device is provided there, which is to recognize impermissible temperature values. This temperature sensor failure assessment device judges the temperature sensor as failed if the signals of the temperature sensor do not change for a predetermined period of time.
  • the invention described in the following advantageously also makes it possible to recognize a strong loss of dynamic of the temperature signal. This means that the temperature signal does not necessarily have to be stuck constantly in order to be classified as defective.
  • the present invention is therefore based on the object of specifying a method for detecting a faulty temperature sensor signal of an internal combustion engine by means of the
  • Te temperature sensor signal is recognized as working correctly.
  • the method according to the invention has the essential advantage that a temperature sensor identified as defective is not erroneously recognized as defective and that a particularly high level of reliability is achieved due to the feedforward control.
  • the figure shows a flow chart of an embodiment of the invention. description
  • an embodiment of a method for detecting and influencing the temperature signal of an internal combustion engine is shown, which runs in the control unit of the internal combustion engine.
  • the control unit includes the necessary computation memory and time measuring means.
  • the diagram shown in the figure is based on a first program step 1, by which the start of the method is determined.
  • program step 2 the temperature of the coolant of the internal combustion engine is measured.
  • a branch is provided in program step 3 such that if the temperature changes sufficiently quickly within a time window, the program jumps to program 7 and the temperature sensor is recognized as being in order. If the temperature does not change in program step 3 or changes only very slowly, a disturbance variable is applied in program step 4.
  • Disturbance variable activation can function, for example, by switching the motor fan on and / or the thermostatic valve and / or the coolant pump on or off.
  • program step 5 a branch is queried as to whether the temperature changes. If the temperature changes sufficiently, the temperature sensor is recognized as OK in program step 7 according to an applied threshold value. If the temperature does not change or changes only insignificantly, the Temperature sensor in program step 6 recognized as defective and there is a
  • Program step 8 is the end of the process.
  • the temperature is measured by means of a sensor which is exposed to the cooling water or is arranged in the immediate vicinity of the cooler and whose output signal is fed to the control unit.
  • the invention is not only limited to the exemplary embodiment, but can generally be used for error detection, the prerequisite being that under predefined circumstances a disturbance variable is switched on which leads to a change in the measured variable within a time interval to be evaluated. If the change does not occur after switching on the disturbance variable, a malfunction is recognized and displayed.
  • the application takes place in a
  • the disturbance variable is usually activated at times when the measured variable does not change. So in the embodiment, in conditions where the engine temperature is about constant, e.g. at idle or at
  • Vehicle speed is zero. If it is recognized under these conditions that the temperature remains constant and the output signal of the sensor does not change, the feedforward control is carried out.
  • the measured variable (temperature) is constantly checked for changes during the feedforward control.
  • the control unit continuously checks whether the vehicle operating conditions, e.g. load, speed, ambient temperature, etc., change during the diagnosis. This influence on the expected change in the measured variable (temperature) is taken into account. If the change in vehicle operating conditions is recognized, this can be taken into account in such a way that a calculated one is determined
  • Model temperature is taken into account. It is important that the model takes into account the feedforward control in addition to the changes in the vehicle operating conditions.
  • the fault detection according to the invention can run immediately after switching on and can then be repeated after predefinable time intervals. In particular, if errors are suspected, the error detection should be repeated until it is clear whether an error has occurred.
  • a further embodiment of the invention consists in that the diagnosis is carried out in the after-running phase of an internal combustion engine and the error which may then have been detected is entered in a memory of the control unit, so that it can be displayed immediately on restart.

Landscapes

  • 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)
  • Measuring Oxygen Concentration In Cells (AREA)

Abstract

L'invention concerne un procédé permettant d'identifier un capteur défectueux, par exemple une sonde de température de liquide de refroidissement pour moteur à combustion interne, qui détermine une grandeur mesurée et émet un signal de sortie dépendant de la grandeur mesurée, qui contrôle quant à lui la plausibilité dans un dispositif d'évaluation, par ex. l'appareil de commande. Un défaut est identifié si, pendant une période prédéterminable, après apparition d'une des grandeurs perturbatrices influant sur la grandeur mesurée, aucune modification du signal de sortie du capteur n'intervient.
EP00993273A 1999-12-03 2000-11-22 Procede d'identification d'un capteur defectueux Withdrawn EP1187977A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19958384A DE19958384A1 (de) 1999-12-03 1999-12-03 Verfahren zur Erkennung eines fehlerhaften Sensors
DE19958384 1999-12-03
PCT/DE2000/004119 WO2001040636A2 (fr) 1999-12-03 2000-11-22 Procede d'identification d'un capteur defectueux

Publications (1)

Publication Number Publication Date
EP1187977A2 true EP1187977A2 (fr) 2002-03-20

Family

ID=7931340

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00993273A Withdrawn EP1187977A2 (fr) 1999-12-03 2000-11-22 Procede d'identification d'un capteur defectueux

Country Status (5)

Country Link
EP (1) EP1187977A2 (fr)
JP (1) JP2003515694A (fr)
KR (1) KR20020005583A (fr)
DE (1) DE19958384A1 (fr)
WO (1) WO2001040636A2 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10131760B4 (de) * 2001-06-30 2012-06-21 Robert Bosch Gmbh Verfahren zum Testen eines Sensors
DE10329038B3 (de) * 2003-06-27 2005-02-24 Audi Ag Verfahren zur Überwachung der Funktionsfähigkeit eines Temperatursensors
US6931865B1 (en) * 2004-02-18 2005-08-23 General Motors Corporation Method and apparatus for determining coolant temperature rationally in a motor vehicle
SE526638C2 (sv) * 2004-02-25 2005-10-18 Scania Cv Ab Övervakning av kylvätsketemperaturgivare
SE526865C2 (sv) * 2004-02-25 2005-11-15 Scania Cv Ab Övervakning av motorkylvätsketemperaturgivare
JP2006233473A (ja) * 2005-02-23 2006-09-07 Matsushita Electric Ind Co Ltd 便座装置
DE102005019588A1 (de) 2005-04-27 2006-11-09 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Überwachen eines temperaturabhängigen Widerstandes insbesondere in einem Wäschetrockner
DE102005048313B4 (de) * 2005-10-06 2013-10-10 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Verfahren zur Diagnose des Zustands eines Thermostaten
DE102006011138B4 (de) * 2006-01-16 2022-09-29 Continental Automotive Technologies GmbH Verfahren zur Funktionsprüfung einer Baugruppe
JP4963052B2 (ja) 2006-09-22 2012-06-27 Ｕｄトラックス株式会社 排気温度センサの異常検出装置
DE102008011225A1 (de) * 2008-02-26 2009-08-27 Robert Bosch Gmbh Diagnoseverfahren und Antriebssteuerung
JP2010101860A (ja) * 2008-10-27 2010-05-06 Mitsubishi Motors Corp 車両に搭載された機構の故障診断装置
DE102009057586B4 (de) 2009-12-09 2016-02-18 Continental Automotive Gmbh Verfahren zum Oberwachen eines Kühlmittel-Temperatursensors eines Kraftfahrzeugs mit einem Verbrennungsmotor und einer Zusatzheizung sowie Steuereinrichtung
DE102010001618A1 (de) * 2010-02-05 2011-08-11 Robert Bosch GmbH, 70469 Verfahren und Vorrichtung zur Diagnose eines Thermostats
DE102011018864A1 (de) 2011-04-28 2012-10-31 Audi Ag Verfahren zum Starten einer Brennkraftmaschine nach einer Betriebspause
DE102011088409B3 (de) 2011-12-13 2013-03-14 Continental Automotive Gmbh Verfahren und Vorrichtung zur Überwachung eines Temperatursensors
DE102014217111A1 (de) * 2014-08-28 2016-03-03 Robert Bosch Gmbh Steuereinrichtung für eine Kühleinrichtung und Verfahren zum Testen einer Kühleinrichtung
DE102016211485A1 (de) * 2016-06-27 2017-12-28 Robert Bosch Gmbh Sensoreinheit und Verfahren zur Funktionsprüfung eines Sensors der Sensoreinheit
KR102452470B1 (ko) 2018-05-15 2022-10-11 현대자동차주식회사 차량용 냉각수온센서 고장 진단방법

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09229479A (ja) * 1996-02-23 1997-09-05 Noritz Corp 給湯器の貯湯温度センサ故障検出装置

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JPS6432443U (fr) * 1987-08-20 1989-03-01
WO1990001631A1 (fr) 1988-07-29 1990-02-22 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Dispositif de securite pour capteur de temperature
US5235527A (en) * 1990-02-09 1993-08-10 Toyota Jidosha Kabushiki Kaisha Method for diagnosing abnormality of sensor
GB9402018D0 (en) * 1994-02-02 1994-03-30 British Gas Plc Apparatus for detecting faults in a combustion sensor
DE19612212B4 (de) * 1995-03-31 2005-12-08 Denso Corp., Kariya Diagnosevorrichtung für einen Luft/Brennstoffverhältnis-Sensor
JP3116781B2 (ja) * 1995-09-11 2000-12-11 トヨタ自動車株式会社 ラジエータの冷却ファンシステムの異常検出装置
JP3675108B2 (ja) * 1996-06-24 2005-07-27 トヨタ自動車株式会社 水温センサの故障診断装置
JP3204108B2 (ja) * 1996-08-23 2001-09-04 トヨタ自動車株式会社 空気温センサの異常検出装置
JPH11326137A (ja) * 1998-05-19 1999-11-26 Hitachi Ltd エンジン制御装置

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Publication number Priority date Publication date Assignee Title
JPH09229479A (ja) * 1996-02-23 1997-09-05 Noritz Corp 給湯器の貯湯温度センサ故障検出装置

Non-Patent Citations (1)

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Title
See also references of WO0140636A3 *

Also Published As

Publication number Publication date
DE19958384A1 (de) 2001-06-07
KR20020005583A (ko) 2002-01-17
WO2001040636A3 (fr) 2001-12-27
JP2003515694A (ja) 2003-05-07
WO2001040636A2 (fr) 2001-06-07

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