EP0525311B1 - Dispositif de soupape réglée par pression et circuit de refroidissement d'un moteur à combustion interne - Google Patents

Dispositif de soupape réglée par pression et circuit de refroidissement d'un moteur à combustion interne Download PDF

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Publication number
EP0525311B1
EP0525311B1 EP92107930A EP92107930A EP0525311B1 EP 0525311 B1 EP0525311 B1 EP 0525311B1 EP 92107930 A EP92107930 A EP 92107930A EP 92107930 A EP92107930 A EP 92107930A EP 0525311 B1 EP0525311 B1 EP 0525311B1
Authority
EP
European Patent Office
Prior art keywords
pressure
closing body
low
cooling fluid
valve
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
EP92107930A
Other languages
German (de)
English (en)
Other versions
EP0525311A1 (fr
Inventor
Georg Dipl.-Ing. Georgs
Peter Grasser
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Mercedes Benz AG
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 Daimler Benz AG, Mercedes Benz AG filed Critical Daimler Benz AG
Publication of EP0525311A1 publication Critical patent/EP0525311A1/fr
Application granted granted Critical
Publication of EP0525311B1 publication Critical patent/EP0525311B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01P11/14—Indicating devices; Other safety devices
    • F01P11/18—Indicating devices; Other safety devices concerning coolant pressure, coolant flow, or liquid-coolant 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
    • 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
    • F01P2025/00—Measuring
    • F01P2025/70—Level

Definitions

  • the invention relates to a pressure-controlled valve device with switchable opening pressure to the coolant circuit of an internal combustion engine for in particular a motor vehicle according to the preamble of patent claim 1.
  • the pressure relief valve in the float is only subjected to a relatively low closing force, this closing force being the difference between the opening pressure of the pressure relief valve located outside the float and that for the one in the coolant tank corresponds to the specified high pressure at engine standstill in relation to atmosphere.
  • this closing force being the difference between the opening pressure of the pressure relief valve located outside the float and that for the one in the coolant tank corresponds to the specified high pressure at engine standstill in relation to atmosphere.
  • the closing pressure of the valve in the float is measured at 0.6 bar.
  • high manufacturing accuracies, in particular with the closing spring are required for perfect work.
  • two independent pressure relief valves each with separate valve parts, in particular separate closing springs, are also necessary.
  • a pressure controlled valve device with two pressure relief valves is known.
  • a first pressure relief valve is provided with a low-pressure closure body which determines the function when gas or steam is applied, and the second is provided with a high-pressure closure body which determines the function when liquid is applied.
  • This valve device also has a float which is arranged such that it blocks a flow path controlled by the low-pressure closure body when the coolant level in the coolant tank rises.
  • two pressure relief valves constructed independently of one another, each with separate valve parts, in particular separate closing springs, are necessary.
  • a correspondingly opening check valve can be attached quite easily in the high-pressure closure body according to claim 1.
  • the drawing shows the same longitudinal section of a pressure-controlled valve device, each with different valve closure body positions.
  • the valve device essentially consists of a carrier part 2, which is fixed in the opening of the coolant container 1 and is covered on the outside by a cover 3.
  • a valve housing 5 is clamped against the cover 3 by a plate spring 4 and is sealed in the carrier part 2 with respect to the opening in the coolant container 1.
  • This housing 5 has a valve seat 6 with a seal 7 lying thereon. While the valve housing 5 seals the interior of the coolant container 1 to the atmosphere between the opening in the coolant container 1 and the valve seat 6, this housing has openings 8 to the atmosphere in its remaining area .
  • the closure body 10 is designed so that there is a low-pressure flow path 11 between the sealing flange 12, the membrane 9 and the valve housing 5, which is connected via an opening 13 to the interior of the coolant container.
  • This opening 13 can be closed by a float 14 which can be raised by the cooling liquid.
  • the low-pressure closure body 10 has a high-pressure flow path 15 leading into the interior of the liquid container, which can be closed to the atmosphere by means of a plate-shaped high-pressure closure.
  • a high-pressure closure body 16 lies against the sealing flange 12 in a sealing manner via a molded-on annular web 17 via a seal.
  • the closing pressure for the two closure bodies 10 and 16 is introduced onto the high-pressure closure body 16 by a compression spring 18 supported on the cover 3.
  • valve device This operation of the valve device is achieved in that the resulting pressure forces triggering an opening of the closure bodies 10 and 16 are designed by appropriate design of the pressure active surfaces of the two closure bodies 10, 16 so that when the float is not raised, the low-pressure closure body 10 opens first, specifically at Reaching the opening pressure set for this.
  • This state is shown in Fig. 2, in which the sealing flange 12 of the low-pressure closure body 10 is lifted from the seal 7 of the valve seat 6 of the valve housing.
  • the float 14 keeps access to the free space 11 within the closure body 10 open, so that the open position of the closure body 10 safely ensures a free outflow of gas or coolant into a valve outlet 19.
  • the float 14 is raised and the opening 13 is closed to the flow path 11. This condition occurs after a hot engine is stopped.
  • the closure of the opening 13 leads to the fact that no more flow can take place via the sealing flange 12 of the low-pressure closure body 10.
  • the active surfaces of the closure body 10 which are exposed to the internal pressure of the liquid container are designed such that, before the high-pressure closure body 16 is opened, the low-pressure closure body 10 first assumes a defined final open position by abutment of its sealing flange 12 against a stop 20. While the closure body 10 is on the way there in the operating state according to FIG. 4, it has reached this end position in the operating state according to the illustration in FIG. 5. If the internal pressure of the liquid container exceeds the closing pressure set for the high-pressure closure body, the latter opens when the low-pressure closure body 10 abuts the stop 20.
  • the low-pressure closure body 10 In the operating state shown in FIG. 4, the low-pressure closure body 10 is in its position which enables the high-pressure closure body 16 to be opened by contact with the stop 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Safety Valves (AREA)
  • Control Of Fluid Pressure (AREA)
  • Fluid-Driven Valves (AREA)

Claims (3)

  1. Dispositif à soupape commandé par pression, dont la pression d'ouverture peut être une basse pression ou une haute pression et qui est disposé dans le circuit de liquide de refroidissement d'un moteur à combustion interne, notamment pour un véhicule, ce dispositif étant sollicité en pression d'une part par de la vapeur ou du gaz se dégageant du liquide de refroidissement contenu dans le réservoir de liquide de refroidissement (1) en fonction de l'état de marche du moteur ou d'autre part par le liquide de refroidissement proprement dit et s'ouvrant quand il est sollicité par le liquide à une pression plus grande que lors d'une sollicitation par du gaz ou de la vapeur,
    le dispositif comportant:
    - un élément de fermeture basse pression (10) opérant en cas de sollicitation par du gaz ou de la vapeur et poussé par ressort dans la position de fermeture.
    - un élément de fermeture haute pression (16) opérant en cas de sollicitation par le liquide et poussé également par resssort dans la position de fermeture,
    - un flotteur (14), qui est déposé de telle sorte que, lors d'une montée du niveau de liquide de refroidissement dans le réservoir (1), il ferme un passage d'écoulement (13, 11) commandé en fonction du débit par l'élément de fermeture basse pression (10), la surface active résultant, qui est prépondérante pour que l'ouverture de l'élément de fermeture basse pression (10) s'effectue sous la pression régnant dans le réservoir de liquide de refroidissement, (1), étant plus grande, dans tous les états de marche, que celle produisant une ouverture de l'élément de fermeture haute pression (16),
    dispositif caractérisé en ce que :
    - l'élément de fermeture basse pression (10) forme le support de l'élément de fermeture haute pression (16).
    - l'élément de fermeture basse pression (10) est traversé par un passage d'écoulement (15) conduisant à l'élément de fermeture haute pression (16) et qui est ouvert dans tous les états de marche,
    - la pression de fermeture sollicitant les éléments de fermeture est appliqué uniquement par l'intermédiaire de l'élément de fermeture haute pression (16), et
    - il eut prévu pour l'élément de fermeture basse pression (10) une butée (20) qui est disposée de telle sorte que l'élément de fermeture basse pression (10) prenne une position d'ouverture définie quand l'élément de fermeture haute pression (16) est ouvert.
  2. Dispositif à soupape commandé par pression selon la revendication 1, caractérisé en ce que l'élément de fermeture basse pression (10) comporte une collerette d'étanchéïté (12), faisant saillie radialement vers l'extérieur, l'entourant avec une forme annulaire, qui peut être appliquée de façon étanche, dans un sens opposé au sens de sortie d'écoulement de la soupape, contre un siège de soupape (6) monté en position fixe dans le corps de soupape (5) et qui est reliée, radialement vers l'extérieur et par l'intermédiaire d'un organe d'étanchéïté (membrane 9) pratiquement exempt de forces de réaction, de façon étanche au gaz avec le corps de soupape (5), un passage d'écoulement basse pression (11) étant formé entre la membrane (9) et la collerette d'étanchéïté (12), débouchant dans le réservoir de liquide de refroidissement (1) et étant séparé de l'intérieur de ce réservoir (1) quand le flotteur (14) est relevé, et en ce que l'élément de fermeture basse pression (10) comporte en outre un passage d'écoulement haute pression (15) reliant le réservoir de liquide de refroidissement (1) avec l'atmosphère quand l'élément de fermeture haute pression (16) est ouvert.
  3. Dispositif à soupape commandé par pression selon la revendication 1 ou 2, caractérisé en ce que l'élément de fermeture haute pression (16) est pourvu d'un clapet anti-retour (21) s'ouvrant de l'atmosphère vers l'extérieur du réservoir de liquide de refroidissement (1).
EP92107930A 1991-07-20 1992-05-12 Dispositif de soupape réglée par pression et circuit de refroidissement d'un moteur à combustion interne Expired - Lifetime EP0525311B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4124182 1991-07-20
DE4124182A DE4124182C1 (fr) 1991-07-20 1991-07-20

Publications (2)

Publication Number Publication Date
EP0525311A1 EP0525311A1 (fr) 1993-02-03
EP0525311B1 true EP0525311B1 (fr) 1994-08-24

Family

ID=6436685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92107930A Expired - Lifetime EP0525311B1 (fr) 1991-07-20 1992-05-12 Dispositif de soupape réglée par pression et circuit de refroidissement d'un moteur à combustion interne

Country Status (4)

Country Link
US (1) US5197440A (fr)
EP (1) EP0525311B1 (fr)
DE (1) DE4124182C1 (fr)
ES (1) ES2063546T3 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4220631C1 (en) * 1992-06-24 1993-03-11 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Valve arrangement for cooling circuit of IC engine - has at least two excess pressure valves and switch valve for change of pressure between excess pressure valves
DE4233038C1 (de) * 1992-10-01 1993-11-25 Daimler Benz Ag Überdrucksicherung für einen Kühlmittelkreislauf
ES2121626T3 (es) * 1994-06-01 1998-12-01 Heinrich Reutter Tapa de cierre fijable a un manguito de deposito.
FR2740830B1 (fr) * 1995-11-08 1997-12-05 Journee Paul Sa Bouchon de circuit de refroidissement de vehicule automobile muni d'un dispositif de degazage
DE29617824U1 (de) * 1996-10-14 1997-02-13 Kuhlmann Guenter Kühlkreislauf-Sicherheitsvorrichtung
DE19642114A1 (de) * 1996-10-14 1997-03-27 Guenter Kuhlmann Kühlkreislauf-Sicherheitsventil mit "hot stop"-Ventil für PKW- und LKW-Motoren
DE19753592A1 (de) * 1997-12-03 1999-06-10 Heinrich Reutter Verschlußdeckel
US6237682B1 (en) * 1999-04-30 2001-05-29 Motorola, Inc. Cooling module including a pressure relief mechanism
KR101459949B1 (ko) * 2013-09-26 2014-11-07 현대자동차주식회사 냉각수 비산 방지 타입 서지탱크

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732971A (en) * 1956-01-31 Radiator caps
US1541073A (en) * 1924-09-12 1925-06-09 Alfred L Sohm Indicator
FR1245326A (fr) * 1960-01-15 1960-11-04 Perfectionnements aux bouchons de radiateurs à circulation d'eau sous pression
JPS5417900B2 (fr) * 1974-03-14 1979-07-03
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
DE3439554A1 (de) * 1984-10-29 1986-04-30 Bayerische Motoren Werke AG, 8000 München Drucksteuervorrichtung fuer den kuehlkreis von brennkraftmaschinen
CA1276011C (fr) * 1986-02-20 1990-11-06 Nippondenso Co., Ltd. Radiateur pour l'automobile
FR2614071A1 (fr) * 1987-04-16 1988-10-21 Chausson Usines Sa Procede pour la regulation du circuit de refroidissement d'un moteur thermique et bouchon pour sa mise en oeuvre

Also Published As

Publication number Publication date
ES2063546T3 (es) 1995-01-01
DE4124182C1 (fr) 1992-06-04
EP0525311A1 (fr) 1993-02-03
US5197440A (en) 1993-03-30

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