EP1544433A1 - Überwachungsvorrichtung des Kühlkreislaufes eines Kraftfahrzeuges - Google Patents

Überwachungsvorrichtung des Kühlkreislaufes eines Kraftfahrzeuges Download PDF

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Publication number
EP1544433A1
EP1544433A1 EP04106282A EP04106282A EP1544433A1 EP 1544433 A1 EP1544433 A1 EP 1544433A1 EP 04106282 A EP04106282 A EP 04106282A EP 04106282 A EP04106282 A EP 04106282A EP 1544433 A1 EP1544433 A1 EP 1544433A1
Authority
EP
European Patent Office
Prior art keywords
scenario
temperature
pressure
indication
monitoring device
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
EP04106282A
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English (en)
French (fr)
Other versions
EP1544433B1 (de
Inventor
Pascal Castro
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.)
SC2N SAS
Original Assignee
SC2N SAS
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Filing date
Publication date
Application filed by SC2N SAS filed Critical SC2N SAS
Publication of EP1544433A1 publication Critical patent/EP1544433A1/de
Application granted granted Critical
Publication of EP1544433B1 publication Critical patent/EP1544433B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • F01P2023/00—Signal processing; Details thereof
    • 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
    • F01P2025/00—Measuring
    • 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
    • F01P2025/00—Measuring
    • F01P2025/04—Pressure
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—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
    • F01P2025/00—Measuring
    • F01P2025/70—Level
    • 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
    • F01P2031/00—Fail safe
    • F01P2031/18—Detecting fluid leaks
    • 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
    • F01P2031/20—Warning devices

Definitions

  • the invention relates to cooling circuits and in particular to the monitoring of the latter as to the occurrence of possible anomalies Operating.
  • the invention is part of such an approach, aimed at providing the driver or mechanic more effective monitoring of the circuit of cooling associated with the engine of a motor vehicle.
  • a monitoring the proper functioning of the cooling circuit of a motor vehicle engine comprising a sensor of temperature, characterized in that it also comprises a sensor of pressure and a bubble presence sensor, a memory in which are stored anomaly scenarios each consisting of one specific combination of measurement results among the pressure, the temperature and the rate of bubble, and in addition means able to compare the measurements provided by the sensors with those of the scenarios pre-recorded anomalies in order to identify the actual appearance of one of these scenarios in the cooling circuit.
  • This device makes it possible to diagnose a circuit of 50 thermal engine cooling.
  • the device here comprises the following elements. It includes three sensors 100, 200, 300 sensitive to different parameters. A processing unit 400 receives signals from these sensors 100, 200, 300, which embeds a diagnostic algorithm 500. device also includes a communication interface 600 with a client interface system (eg visual interface in the form of a dashboard).
  • client interface system eg visual interface in the form of a dashboard
  • One of the sensors is a temperature sensor 100, which can be, without excluding other technologies, resistance to Coefficient of Negative Temperature (NTC).
  • a second sensor 200 captures the pressure of detection of gas bubbles, preferably able to provide a measurement a rate of bubbles in the liquid.
  • the signal processing unit 400 is intended to verify that the Cooling system 50 is working properly.
  • the intersection of information from the three sensors 100, 200, 300 allows him to give indications of the origin of the malfunction.
  • T Ok the case where the temperature 100 read by the sensor temperature 100 is normal.
  • T ⁇ the case where the temperature 100 read by the sensor of temperature 100 is too high.
  • T ⁇ the case where the temperature 100 read by the sensor of temperature is too low.
  • Each scenario consists of a combination of three measurement states (temperature, pressure, bubble ratio) and a indication of anomaly associated with the combination in the presence.
  • T Ok P OK TB 0
  • the cooling circuit is working normally 2 T Ok P OK TB ⁇
  • This circuit has a safety valve state in an abnormally blocked situation 4
  • T Ok P ⁇ TB 0
  • the circuit shows a liquid leak 6
  • T Ok P ⁇ TB 0
  • the circuit has a calorstat which is abnormally blocked closed 8 T ⁇ P OK TB ⁇
  • the circuit has a safety valve which is abnormally blocked and also has a calorstat which is abnormally blocked closed 10 T ⁇ P ⁇ TB ⁇
  • the circuit has a calorstat which is abnormally blocked closed.
  • the circuit presented a cylinder head gasket that is defective 11 T ⁇ P ⁇ TB 0
  • the circuit has a calorstat which is blocked closed and the circuit also has a liquid leak 12 T ⁇ P ⁇ TB ⁇
  • the circuit has a calorstat that is abnormally blocked open 14 T ⁇ P OK TB ⁇
  • the circuit has a heat sink that is abnormally blocked open and the circuit also has a safety valve that is abnormally blocked 16 T ⁇ P ⁇ TB ⁇
  • the circuit has a heat sink that is abnormal
  • Processing unit 400 also analyzes here the behavior of input variables (pressure, temperature and bubble rate) over time and continuously. This allows him to refine the diagnosis.
  • the algorithm will identify the fact that the calorstat is working properly and that overheating is rather due to lack of liquid.
  • the unit of treatment 400 succeeds in distinguishing between the two cases of anomalies that may have cause the final situation, ie too high a temperature and high bubbles (line 8 of the table).
  • the unit of treatment 400 succeeds in distinguishing between the two cases of anomalies that may have cause the final situation, ie too high a temperature and high bubbles (line 8 of the table).
  • the information processing unit 400 preferably makes call to a microcontroller to ensure this treatment. But the sensor of Bubbles 300 already uses a microcontroller 400 as will be described hereinafter. It is advantageous to use this same microcontroller to perform both the bubble rate identification function too high and the diagnosis of the Cooling system.
  • the client interface 400 can be of any type. However, he note that the system that controls the operation of an engine thermal need to know the temperature of the liquid of cooling. It is advantageous, in this aspect, to use an interface 600 capable of returning both the diagnosis of the cooling circuit and the temperature of the liquid, or even, if necessary, the pressure.
  • the interface 600 can be CAN, LIN, Asynchronous and without any limitation of technology.
  • the bubble presence sensor 300 which is advantageously recommended here is a bubble-type bubble detection sensor of the type comprising a light emitter 310 and a light receiver 320.
  • processing means implementing a algorithm 330 which calculates a variation of light intensity between two successive measurements of the receiver.
  • These means for measuring variations include ways to compare a variation in intensity between two measurements with a predefined threshold, the crossing the threshold initiating the incrementation of a counter which itself triggers a alert when another predefined threshold value is exceeded this time by this counter.
  • Such a high bubble rate detector is exposed in the application FR 02 14 805 in the name of the applicant.

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)
  • Control Of Electric Motors In General (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Measuring Fluid Pressure (AREA)
EP04106282A 2003-12-16 2004-12-03 Überwachungsvorrichtung des Kühlkreislaufes eines Kraftfahrzeuges Not-in-force EP1544433B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0314710 2003-12-16
FR0314710A FR2863662B1 (fr) 2003-12-16 2003-12-16 Dispositif de surveillance du circuit de refroisissement d'un vehicule automobile

Publications (2)

Publication Number Publication Date
EP1544433A1 true EP1544433A1 (de) 2005-06-22
EP1544433B1 EP1544433B1 (de) 2008-03-26

Family

ID=34508670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04106282A Not-in-force EP1544433B1 (de) 2003-12-16 2004-12-03 Überwachungsvorrichtung des Kühlkreislaufes eines Kraftfahrzeuges

Country Status (4)

Country Link
EP (1) EP1544433B1 (de)
AT (1) ATE390543T1 (de)
DE (1) DE602004012698T2 (de)
FR (1) FR2863662B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007057312A1 (de) * 2005-11-18 2007-05-24 Continental Automotive Gmbh Vorrichtung zur kühlung eines verbrennungsmotors
WO2013039731A3 (en) * 2011-09-15 2013-06-13 General Electric Company Systems and methods for diagnosing an engine
DE102008029509B4 (de) * 2008-06-21 2019-05-02 Bayerische Motoren Werke Aktiengesellschaft Sicherheitseinrichtung eingerichtet für eine Brennkraftmaschine eines Kraftfahrzeugs und Verfahren zum Betrieb eines Kraftfahrzeugs mit einer Brennkraftmaschine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010023083A1 (de) * 2010-06-08 2011-12-08 Gm Global Technology Operations Llc (N.D.Ges.D. Staates Delaware) Verfahren zum Betreiben eines Motorkühlsystems eines Fahrzeugs und System zur Steuerung der Motorkühlung eines Fahrzeugs

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5081443A (en) * 1987-06-02 1992-01-14 Christoph Breit Device for protecting the systems and load of motor vehicles
FR2673244A1 (fr) * 1991-02-21 1992-08-28 Jeoffroy Jean Pierre Dispositif et procede de controle du circuit de refroidissement des moteurs a combustion interne.
US5656771A (en) * 1995-03-20 1997-08-12 Besmarguage Cc. Motor vehicle cooling system status indicator
DE19825194A1 (de) * 1998-06-05 1999-12-09 Thomas Grieshaber Verfahren zum ermitteln von Luft, Gas und/oder Ölbeständen in einer Flüssigkeit
WO2001053674A1 (de) * 2000-01-18 2001-07-26 Robert Bosch Gmbh Verfahren zur fehlererkennung eines kühlsystems eines kraftfahrzeug-motors
DE10161867A1 (de) * 2001-12-14 2003-10-16 Bayerische Motoren Werke Ag Verfahren zur Überwachung eines Flüssigkeits-Kühlkreislaufs einer Brennkraftmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5081443A (en) * 1987-06-02 1992-01-14 Christoph Breit Device for protecting the systems and load of motor vehicles
FR2673244A1 (fr) * 1991-02-21 1992-08-28 Jeoffroy Jean Pierre Dispositif et procede de controle du circuit de refroidissement des moteurs a combustion interne.
US5656771A (en) * 1995-03-20 1997-08-12 Besmarguage Cc. Motor vehicle cooling system status indicator
DE19825194A1 (de) * 1998-06-05 1999-12-09 Thomas Grieshaber Verfahren zum ermitteln von Luft, Gas und/oder Ölbeständen in einer Flüssigkeit
WO2001053674A1 (de) * 2000-01-18 2001-07-26 Robert Bosch Gmbh Verfahren zur fehlererkennung eines kühlsystems eines kraftfahrzeug-motors
DE10161867A1 (de) * 2001-12-14 2003-10-16 Bayerische Motoren Werke Ag Verfahren zur Überwachung eines Flüssigkeits-Kühlkreislaufs einer Brennkraftmaschine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007057312A1 (de) * 2005-11-18 2007-05-24 Continental Automotive Gmbh Vorrichtung zur kühlung eines verbrennungsmotors
DE102008029509B4 (de) * 2008-06-21 2019-05-02 Bayerische Motoren Werke Aktiengesellschaft Sicherheitseinrichtung eingerichtet für eine Brennkraftmaschine eines Kraftfahrzeugs und Verfahren zum Betrieb eines Kraftfahrzeugs mit einer Brennkraftmaschine
WO2013039731A3 (en) * 2011-09-15 2013-06-13 General Electric Company Systems and methods for diagnosing an engine
US8875561B2 (en) 2011-09-15 2014-11-04 General Electric Company Systems and methods for diagnosing an engine
EA030230B1 (ru) * 2011-09-15 2018-07-31 Дженерал Электрик Компани Системы и способы диагностики двигателя

Also Published As

Publication number Publication date
FR2863662A1 (fr) 2005-06-17
EP1544433B1 (de) 2008-03-26
DE602004012698D1 (de) 2008-05-08
ATE390543T1 (de) 2008-04-15
FR2863662B1 (fr) 2006-02-10
DE602004012698T2 (de) 2009-04-16

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