EP0101339B1 - Dispositif de pressurisation du circuit de refroidissement d'un moteur thermique - Google Patents

Dispositif de pressurisation du circuit de refroidissement d'un moteur thermique Download PDF

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Publication number
EP0101339B1
EP0101339B1 EP83401344A EP83401344A EP0101339B1 EP 0101339 B1 EP0101339 B1 EP 0101339B1 EP 83401344 A EP83401344 A EP 83401344A EP 83401344 A EP83401344 A EP 83401344A EP 0101339 B1 EP0101339 B1 EP 0101339B1
Authority
EP
European Patent Office
Prior art keywords
pressure
value
chamber
valve
pressurization
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
Application number
EP83401344A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0101339A1 (fr
Inventor
Jean-Paul Pernet
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.)
Renault Trucks SAS
Original Assignee
Renault Vehicules Industriels SA
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 Renault Vehicules Industriels SA filed Critical Renault Vehicules Industriels SA
Priority to AT83401344T priority Critical patent/ATE14912T1/de
Publication of EP0101339A1 publication Critical patent/EP0101339A1/fr
Application granted granted Critical
Publication of EP0101339B1 publication Critical patent/EP0101339B1/fr
Expired legal-status Critical Current

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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
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/0204—Filling
    • F01P11/0209—Closure caps
    • F01P11/0238—Closure caps with overpressure valves or vent 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
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/0204—Filling
    • F01P11/0209—Closure caps
    • F01P11/0238—Closure caps with overpressure valves or vent valves
    • F01P2011/0242—Closure caps with overpressure valves or vent valves setting the pressure valve

Definitions

  • the present invention relates to a device for pressurizing the cooling circuit of a heat engine such as for example an internal combustion engine.
  • pressurization devices comprising an enclosure, supplied by a source of pressurized gas and in which the coolant of the heat engine circulates, such as for example an expansion tank.
  • These devices are fitted with a pressure relief valve connected to the atmosphere and having a first setting value, intended to reduce the pressure prevailing in the circuit when the latter exceeds a predetermined value.
  • the object of the invention is to propose a pressurization device making it possible to establish the desired pressure in the cooling circuit, whatever the engine load but without there being any sweeping of the expansion vessel by the gas of pressurization.
  • the invention provides a pressurization device of the type mentioned above, characterized in that it comprises a second pressure relief valve having a second setting value, mounted in series with said first valve between the latter and said enclosure so as to define between said first and second valves a chamber connected to said source of gas under pressure, and a vacuum valve provided for placing said chamber in communication with said enclosure when the pressure prevailing in the latter is lower than the pressure prevailing in said room.
  • the device according to the present invention makes it possible to prevent the enclosure from being swept by gas under pressurization pressure, while ensuring a level of pressurization equal to atmospheric pressure increased by the sum of said first and second taring values.
  • the device makes it possible to continue to ensure pressurization of the circuit in the event of failure of one of the two valves.
  • FIG. 1 a portion of a cooling circuit of a heat engine such as for example an internal combustion engine comprising a device 10 for pressurizing the circuit, produced in accordance with the teachings of the present invention.
  • a heat engine such as for example an internal combustion engine
  • a device 10 for pressurizing the circuit produced in accordance with the teachings of the present invention.
  • the pressurization device 10 comprises an enclosure 12, such as for example an expansion tank, in which circulates the coolant 14 which can enter and leave it through the conduits 16 and 18.
  • the device 10 comprises a first pressure relief valve 20 having a first setting value T,.
  • the first pressure relief valve 20 is mounted on the upper part of the enclosure 12 on which it is fixed by means of a hermetic plug 22 provided on its upper face with an orifice 24 opening towards the atmosphere.
  • the first pressure relief valve 20 is more precisely mounted at the end of a tubular chute 26 attached to the upper face 28 of the enclosure 12.
  • the pressurization device comprises a second pressure relief valve 30 having a second setting value T 2, which is mounted in series with the first pressure relief valve 20.
  • the second pressure relief valve 30 is fixed to the lower part of the chute 26 in the vicinity of the upper face 28 of the enclosure 12.
  • the second valve 30 is therefore, as can be seen in FIG. 1, mounted between the first valve 20 and the enclosure 12 so as to define between the first valve 20 and the second valve 30 a chamber 32 inside the tubular trough 26.
  • the enclosure 12 is supplied by a source of pressurized gas 34.
  • the enclosure 12 is supplied by the pressure source 34 through the chamber 32 to which the pressure source 34 is connected by means of a conduit 36 in which is arranged a non-return valve 38 capable of allowing the pressurized gas to pass only from the source 34 to the chamber 32.
  • the device comprises a vacuum valve 40, integrated in the pressure valve 30, having a third setting value T 3 .
  • the vacuum valve 40 which is shown schematically in FIGS. 2 to 4, is provided to allow the communication of the chamber 32 with the enclosure 12 when the pressure prevailing in the latter is lower than the pressure prevailing in the chamber 32.
  • the various pressure relief valves 20, 30 and depression 40 have not been shown in detail, but are of a conventional type commonly used in pressurized cooling circuits whose plugs are fitted with tared depression and pressure relief valves such that for example those illustrated in the French patent application published under No. 2439144.
  • the setting values T, and T 2 of the pressure relief valves 20 and 30 are equal to 250 millibars (mbar).
  • the setting value T 3 of the vacuum valve 40 being equal to 50 mbar.
  • the value of the atmospheric pressure P o prevailing outside the cooling circuit is equal to 1000 mbar is roughly one atmosphere.
  • the enclosure 12 is the expansion tank of a cooling circuit for an internal combustion engine of a motor vehicle, and the source of pressurized gas 34 can be constituted for example by a connected conduit. on intake of the engine if the latter is of the supercharged type or via a duct connected to the engine exhaust in the case of an atmospheric engine.
  • the source of pressurized gas, or pressurization gas flows into the conduit 36 and causes the pressure P to increase, prevailing in the chamber 32.
  • the vacuum valve 40 opens to cause the increase in the value of the pressure P prevailing in the enclosure 12. If the value of the pressure of the pressurizing gas coming from the source 34 is greater than a predetermined value equal to the atmospheric pressure P o increased by the setting value T, of the valve 30, the pressure level P, prevailing in the chamber 32 is permanently established at a value at least equal to said value predetermined.
  • the pressure P 2 prevailing in the enclosure 12 is established at a maximum pressurization value equal to P 0 + T 1 + T 2, ie in the example illustrated 1500 mbar. It is thus understood that the maximum value of the overpressure prevailing in the circuit is equal to the sum of the calibration values T, and T 2 , whatever the values of the latter which are not necessarily equal.
  • a second vacuum valve 50 integrated into the first pressure relief valve 20.
  • This second vacuum valve 50 is not always necessary for the operation of the device according to the present invention but it makes it possible to equalize the levels pressure P 0 and P, when the engine is stopped and the source of pressurized gas 34 no longer flows; the setting T 4 of the second vacuum valve 50 must of course be chosen at a low value, for example equal to the value of the setting T 3 of the first vacuum valve 40.
  • the pressurization device would continue to operate with a maximum pressurization value equal to P 0 + T 1 but with the drawback that the device would operate with a sweep of the enclosure by pressurizing gas.
  • the maximum value of the pressurization is equal to T, + T Z but it is in no case imperative that the two calibration values are equal; however, in the event of failure of one of the two valves, and as has just been described, the pressure in the circuit will be established at atmospheric value increased by the setting value of the valve which continues to operate.
  • the supply of pressurized gas takes place through a calibrated orifice 36, 38, since this supply must only supply a leak rate.
  • This calibration is desirable in par Particularly if the pressurization gas in question is taken from the engine exhaust, in order to limit condensation in the cooling system. Although it does not affect the invention itself, this calibration is also desirable if the gas is taken directly from the vehicle's compressed air circuit or from the engine's charge air, in order to limit losses.
  • the volume of the chamber 32 is small compared to the volume of the enclosure 12, and this in order to avoid a too rapid pressure drop when the valve 30 opens.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Fluid Pressure (AREA)
  • Press Drives And Press Lines (AREA)
  • Control Of Fluid Pressure (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP83401344A 1982-07-08 1983-06-29 Dispositif de pressurisation du circuit de refroidissement d'un moteur thermique Expired EP0101339B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83401344T ATE14912T1 (de) 1982-07-08 1983-06-29 Druckvorrichtung des kuehlkreislaufs einer brennkraftmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8211977 1982-07-08
FR8211977A FR2529951A1 (fr) 1982-07-08 1982-07-08 Dispositif de pressurisation du circuit de refroidissement d'un moteur thermique

Publications (2)

Publication Number Publication Date
EP0101339A1 EP0101339A1 (fr) 1984-02-22
EP0101339B1 true EP0101339B1 (fr) 1985-08-14

Family

ID=9275795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401344A Expired EP0101339B1 (fr) 1982-07-08 1983-06-29 Dispositif de pressurisation du circuit de refroidissement d'un moteur thermique

Country Status (6)

Country Link
US (1) US4478178A (enrdf_load_stackoverflow)
EP (1) EP0101339B1 (enrdf_load_stackoverflow)
AT (1) ATE14912T1 (enrdf_load_stackoverflow)
DE (1) DE3360572D1 (enrdf_load_stackoverflow)
ES (1) ES523153A0 (enrdf_load_stackoverflow)
FR (1) FR2529951A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3716555A1 (de) * 1987-05-18 1988-12-08 Bayerische Motoren Werke Ag Befuell-, entlueftungs- und drucksteuer-vorrichtung fuer den fluessigkeits-kuehlkreis von kraft- und arbeitsmaschinen, insbesondere brennkraftmaschinen

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3436702A1 (de) * 1984-10-06 1986-04-10 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Vorrichtung zum absichern des kuehlmittelkreislaufs eines verbrennungsmotors
DE4121086A1 (de) * 1991-06-26 1993-01-14 Laengerer & Reich Kuehler Ueberdruckventileinrichtung fuer den kuehlkreislauf einer fluessigkeitsgekuehlten brennkraftmaschine
FR2679619B1 (fr) * 1991-07-25 1993-09-24 Journee Paul Sa Bouchon de fermeture muni d'une valve de surpression.
US5520209A (en) * 1993-12-03 1996-05-28 The Dow Chemical Company Fluid relief device
DE19611095A1 (de) * 1996-03-21 1997-09-25 Bayerische Motoren Werke Ag Kühlsystem für eine flüssigkeitsgekühlte Brennkraftmaschine
FR2752016B1 (fr) * 1996-07-31 1998-09-11 Renault Dispositif de refroidissement d'un moteur a combustion interne
US5839398A (en) * 1997-10-23 1998-11-24 Trw Inc. Power steering fluid temperature control
DE19753597A1 (de) * 1997-12-03 1999-06-24 Heinrich Reutter Verschlußdeckel für Kraftfahrzeugkühler
US6532910B2 (en) * 2001-02-20 2003-03-18 Volvo Trucks North America, Inc. Engine cooling system
US7152555B2 (en) * 2001-02-20 2006-12-26 Volvo Trucks North America, Inc. Engine cooling system
WO2010012053A1 (en) * 2008-08-01 2010-02-04 Marcos Pereira Da Silva Flow control valve for general vehicles' radiators
SE538660C2 (sv) * 2014-02-10 2016-10-11 Scania Cv Ab Ventilanordning för att upprätthålla ett förbestämt tryck i ett kylsystem i ett fordon
US9856777B2 (en) * 2014-12-08 2018-01-02 Toledo Molding & Die, Inc. Dual chamber coolant reservoir

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US27965A (en) * 1860-04-24 Looking-glass ob mirror
US3071285A (en) * 1959-10-07 1963-01-01 Stant Mfg Company Inc Depressed pressure cap
FR1252170A (fr) * 1959-12-17 1961-01-27 Dispositif de refroidissement d'un moteur à combustion interne
AT279273B (de) * 1959-12-17 1970-02-25 Gratzmuller J Kuehlanlage bei fluessigkeitsgekuehlten dieselmotoren fuer fahrzeugantriebe
US3062400A (en) * 1960-05-03 1962-11-06 Reuben J Humbert Safety valved pressure caps
US3171392A (en) * 1962-03-29 1965-03-02 Magneti Marelli Spa System and related apparatus for the cooling plant of internal combustion engines
USRE27965E (en) * 1972-02-22 1974-04-09 Pressurized liquid cooling system
US3910451A (en) * 1973-10-01 1975-10-07 Arthur P Tusing Radiator cap
US4023583A (en) * 1975-11-10 1977-05-17 Brown-Minneapolis Tank & Fabricating Co. Vent valve with back pressure check
AU525015B2 (en) * 1978-09-15 1982-10-14 A.S. Daly Nominees Pty. Ltd. Radiator cap assembly
DE2845644A1 (de) * 1978-10-20 1980-04-24 Bayerische Motoren Werke Ag Verschluss fuer die einfuelloeffnung eines behaelters

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3716555A1 (de) * 1987-05-18 1988-12-08 Bayerische Motoren Werke Ag Befuell-, entlueftungs- und drucksteuer-vorrichtung fuer den fluessigkeits-kuehlkreis von kraft- und arbeitsmaschinen, insbesondere brennkraftmaschinen

Also Published As

Publication number Publication date
ATE14912T1 (de) 1985-08-15
ES8403565A1 (es) 1984-03-16
FR2529951B1 (enrdf_load_stackoverflow) 1984-12-14
ES523153A0 (es) 1984-03-16
DE3360572D1 (en) 1985-09-19
EP0101339A1 (fr) 1984-02-22
US4478178A (en) 1984-10-23
FR2529951A1 (fr) 1984-01-13

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