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EP0180208B1 - Dispositif pour régler la pression pour un circuit de refroidissement d'un moteur à combustion interne - Google Patents

Dispositif pour régler la pression pour un circuit de refroidissement d'un moteur à combustion interne Download PDF

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Publication number
EP0180208B1
EP0180208B1 EP85113780A EP85113780A EP0180208B1 EP 0180208 B1 EP0180208 B1 EP 0180208B1 EP 85113780 A EP85113780 A EP 85113780A EP 85113780 A EP85113780 A EP 85113780A EP 0180208 B1 EP0180208 B1 EP 0180208B1
Authority
EP
European Patent Office
Prior art keywords
valve
pressure
excess
expansion volume
cooling circuit
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
EP85113780A
Other languages
German (de)
English (en)
Other versions
EP0180208A2 (fr
EP0180208A3 (en
Inventor
Erwin Schweiger
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0180208A2 publication Critical patent/EP0180208A2/fr
Publication of EP0180208A3 publication Critical patent/EP0180208A3/de
Application granted granted Critical
Publication of EP0180208B1 publication Critical patent/EP0180208B1/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
    • F01P11/029—Expansion reservoirs
    • 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
    • F01P11/0247—Safety; Locking against opening
    • 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
    • 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
    • F01P3/00—Liquid cooling
    • F01P3/22—Liquid cooling characterised by evaporation and condensation of coolant in closed cycles; characterised by the coolant reaching higher temperatures than normal atmospheric boiling-point
    • F01P3/2207—Liquid cooling characterised by evaporation and condensation of coolant in closed cycles; characterised by the coolant reaching higher temperatures than normal atmospheric boiling-point characterised by the coolant reaching temperatures higher than the normal atmospheric boiling point

Definitions

  • the invention relates to a pressure control device according to the preamble of claim 1, according to DE-A-30 45 357, or 4, according to DE-A-31 43 749.
  • a pressure control device of a similar design is part of the prior art due to the unpublished patent application EP-A-0 177 860 according to Art. 54.3 EPC.
  • a switching valve is actuated depending on the operation of the machine and switches on the pressure relief valve for the lower operating pressure during operation of the machine, while after the machine has been switched off to avoid coolant ejection during reheating from full load only the pressure relief valve is effective for the higher operating pressure.
  • an auxiliary power control device with corresponding construction and switching effort is required for the actuation of the switching valve.
  • this design also has functional disadvantages, because the switching valve cannot prevent ejection of coolant both when the machine is reheated during an idling operation after full load, and when the machine is restarted during reheating after it has been switched off at full load .
  • a first pressure relief valve is preceded by a float valve on a closure cover, which prevents unevaporated coolant from escaping through this pressure relief valve and thus in the region of a motor vehicle which causes visual impairment.
  • a second pressure relief valve which is separate from the sealing cover, is parallel to the first one and, when the pressure rises further, discharges the coolant under the vehicle.
  • the object of the invention is to improve the pressure control device of the known type so that both the construction cost is reduced and the function is improved.
  • the series switching arrangement of the pressure relief valves according to claim 1 has the additional advantages over the parallel switching arrangement according to claim 4, that in the event of a leak in any of the valves, the cooling circuit nevertheless remains operable with the lower operating pressure and that the same components for the same, for both pressure relief valves however, additive opening pressure values can be used.
  • claims 2 and 3 contain particularly advantageous solutions of the basic idea of the invention according to claim 1.
  • the arrangement of the float valve in the valve chamber between the two pressure relief valves according to claim 2 excludes an influence of intensive flow and swirling movements of the coolant in the expansion volume of a cooler water tank or an expansion tank on the function of the float valve.
  • the features of claim 3 enable an interchangeable application with commercially available sealing caps with little additional construction effort.
  • the expansion tank 3 contains an air-coolant heat exchanger as a cooler 2, a secondary flow expansion tank 3, a thermostat 4 and a coolant pump 5.
  • a secondary ventilation flow leads from a high point of the cooling circuit on Cooler 2 has a ventilation line 6 in the expansion tank 3 and from there back to the pump suction line 7 a filling line 8.
  • the expansion tank 3 has a correspondingly dimensioned filling nozzle 11.
  • the expansion tank 3 contains on its upper side connected to the expansion volume 10 valves, namely two series-connected, identical pressure relief valves 12 and 13 and in each case a vacuum valve 14 and float valve 15 arranged in parallel with a pressure relief valve 12 or 13 and centrally arranged therein Pressure relief valves 12 and 13 and the vacuum valve 14 each have a closing spring 12 ', 13' and 14 'and overall a commercially available structure.
  • the float valve 15 is adapted to the structure of the vacuum valve 14 and a central bypass opening 15 'provided for it in the associated pressure relief valve 12.
  • Recesses 16 in a holding plate 17 of the float valve 15 ensure the flow of air from the expansion volume 10 and the lower pressure relief valve 13 or to the vacuum valve 14 and through the valve chamber 18, which is closed on all sides, and the overflow connection 19 to and from the atmosphere.
  • the switching level 20 of the float valve 15 is matched to the maximum fill level 9 in the expansion tank 3 in such a way that the switching level 20 is higher than the highest coolant level 21 in normal operation without vapor formation in the machine 1.
  • the coolant level increases a full load operation of the machine 1 in the subsequent idle operation or after switching off due to afterheating with steam formation, especially in the cooling jacket of the cylinder head of the engine 1 above the switching level 20 of the float valve 15, so on the one hand ejection by closing the float valve 15 prevented by coolant and, on the other hand, by connecting the two pressure relief valves 12 and 13 in series, the pressure value is doubled, thereby limiting the vapor formation.
  • the increased overpressure value remains effective even when restarted until the vapor volume has condensed and the coolant level has dropped below the switching level 20 again.
  • a loss of coolant is thus ruled out in all normal operating conditions of an intact machine 1. Loss of coolant and excessive operating pressure are even ruled out even in the case of fuel gas leaks in the cooling circuit, because the fuel gas is separated from the bypass vent in the expansion tank and can blow off via the open float valve 15 and the lower pressure valve 13 that opens at the lower operating pressure.
  • the arrangement of the float valve 15 in the narrow valve chamber 18 prevents the function of the float valve 15 from being displaced and movements of the coolant level caused by acceleration.
  • the float valve 115 is designed corresponding to the valve seat for a commercially available vacuum valve 114 and is arranged instead of one.
  • This valve insert 124 is attached to the commercially available screw cap 122 by simply plugging it on and can therefore also be retrofitted.
  • an arrangement of float valve 115 and vacuum valve 114 which is interchanged with respect to FIG. 1 is better, because this means that an exchange of the commercially available vacuum valve 114 for the float valve 115 can be omitted.
  • the bayonet cover 222 shown in FIG. 3 also corresponds to a commercially available design including a pressure relief valve 212 and in some cases also a vacuum valve 214. However, its valve disk is modified to a holding flange 226 for a valve housing 227 and provided with through openings 228. A float valve 215, which controls the passage opening 228, is arranged in the valve housing 227.
  • the flanged edge 227 'of the valve housing 227 serves as the sealing edge of the vacuum valve 214 and, like the valve disk of the vacuum valve in a conventional manner, interacts with the sealing disk 229 of the pressure valve 212.
  • the underside of the valve housing 227 facing the expansion volume 210 contains the second pressure relief valve 213, which, until the float valve 215 closes, determines a lower pressure in the expansion volume 210 than the first pressure relief valve 212, which is then decisive, with the closing spring 212 ′ dimensioned for the higher pressure opening value.
  • the two pressure relief valves 212 and 213 are connected in parallel, so that one each alone determines the maximum pressure to be set in the expansion volume 210 due to the function of the float valve 215.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Safety Valves (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Claims (4)

1. Dispositif de contrôle de la pression pour le circuit de refroidissement de moteurs à combustion interne, dispositif dans lequel le volume d'expansion (110) d'un espace de compensation de l'agent de refroidissement, ou bien d'un récipient de compensation (3) de l'agent de refroidissement, est en liaison avec un raccordement de décharge en direction de l'atmosphère ou en provenance de l'atmosphère, par l'intermédiaire de deux soupapes de surpression (112 et 113), d'une soupape de dépression (114) et d'une soupape de commutation (115), la soupape de commutation (115) amenant alternativement dans sa position d'ouverture et dans sa position de fermeture, les deux soupapes de surpression montées en série (112 et 113) à agir pour créer une pression de fonctionnement plus basse et une pression de fonctionnement plus élevée dans le circuit de refroidissement, cependant qu'un couvercle de remplissage et de fermeture (122) est disposé sur le volume d'expansion (110), dispositif caractérisé en ce que sur le couvercle de remplissage et de fermeture (122) sont disposées deux soupapes de surpression (112 et 113), la soupape de dépression (114) et la soupape de commutation revêtant la forme d'une soupape à flotteur (115).
2. Dispositif selon la revendication 1, caractérisé en ce que le couvercle de remplissage et de fermeture (122) comporte une chambre de soupape (18) de faible volume à laquelle sont associées, en direction du volume d'expansion (110) la première soupape de surpression (113) et la soupape de dépression (114), et en direction de l'atmosphère, la seconde soupape de surpression (112) et la soupape à flotteur (115).
3. Dispositif selon la revendication 2, caractérisé en ce que le couvercle (122) comporte, selon une disposition habituelle dans le commerce, à l'intérieur d'un évidement (123), ouvert en direction du volume d'expansion (110), la seconde soupape de surpression (112) et la soupape à flotteur (115) montée en parallèle par rapport à celle-ci, l'évidement (123) étant fermé vers le volume d'expansion (110) au moyen d'un jeu de soupapes (124) fixé de façon étanche, pour constituer la chambre de soupape (18) et ce jeu de soupapes (124) comprenant la première soupape de surpression (113) et la soupape de dépression (114) montée en parallèle par rapport à celle-ci.
4. Dispositif de contrôle de la pression pour le circuit de refroidissement de moteurs à combustion interne, dans lequel le volume d'expansion (210) d'un espace de compensation de l'agent de refroidissement ou bien d'un récipient de compensation (3) de l'agent de refroidissement, est en liaison avec un raccordement de décharge en direction de l'atmosphère ou en provenance de l'atmosphère par l'intermédiaire de deux soupapes de surpression (212 et 213) et d'une soupape de commutation (215), la soupape de commutation (215) amenant alternativement, dans sa position d'ouverture et dans sa position de fermeture, les deux soupapes de surpression (212 et 213) montées en parallèle établissant une pression de fonctionnement plus basse et une pression de fonctionnement plus élevée dans le circuit de refroidissement, cependant qu'un couvercle de remplissage et de fermeture (222) est disposé sur le volume d'expansion (210), dispositif caractérisé en ce que sur le couvercle de remplissage et de fermeture (222) sont disposées deux soupapes de surpression (212 et 213), une soupape de dépression (214) et la soupape de commutation revêtant la forme d'une soupape à flotteur (215).
EP85113780A 1984-10-29 1985-10-29 Dispositif pour régler la pression pour un circuit de refroidissement d'un moteur à combustion interne Expired EP0180208B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3439554 1984-10-29
DE19843439554 DE3439554A1 (de) 1984-10-29 1984-10-29 Drucksteuervorrichtung fuer den kuehlkreis von brennkraftmaschinen

Publications (3)

Publication Number Publication Date
EP0180208A2 EP0180208A2 (fr) 1986-05-07
EP0180208A3 EP0180208A3 (en) 1987-04-29
EP0180208B1 true EP0180208B1 (fr) 1989-12-13

Family

ID=6249018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113780A Expired EP0180208B1 (fr) 1984-10-29 1985-10-29 Dispositif pour régler la pression pour un circuit de refroidissement d'un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP0180208B1 (fr)
DE (2) DE3439554A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE4020866C1 (fr) * 1990-06-29 1991-05-23 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
DE4124182C1 (fr) * 1991-07-20 1992-06-04 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
DE4228185C2 (de) * 1992-08-25 1996-02-15 Daimler Benz Ag Vorrichtung zur Steuerung des Druckes der Kühlflüssigkeit einer Brennkraftmaschine
CN112901331B (zh) * 2021-01-12 2022-04-22 武汉路特斯汽车有限公司 一种多回路冷却液共用的加注装置
DE102022128616B3 (de) 2022-10-28 2024-01-04 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Phasenwechselkühlkreislauf mit Drucksteuereinrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1488484A (en) * 1974-11-01 1977-10-12 Chrysler Uk Header tanks for coolant radiators

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1541074A (en) * 1924-10-02 1925-06-09 Alfred L Sohm Indicator
US2195266A (en) * 1939-02-24 1940-03-26 Gen Motors Corp Pressure cap
US2535974A (en) * 1947-07-02 1950-12-26 Robertshaw Fulton Controls Co Thermostatically controlled pressure cap for radiators
GB896850A (en) * 1957-06-01 1962-05-16 British Leyland Motor Corp Engine cooling systems for vehicles
US2878794A (en) * 1957-07-29 1959-03-24 Ralph O Stromberg Automobile cooling system
FR1383099A (fr) * 1963-11-13 1964-12-24 Applic Ind Soc Et Installation perfectionnée de refroidissement du moteur d'un véhicule automobile etde climatisation de ce dernier
JPS5417900B2 (fr) * 1974-03-14 1979-07-03
FR2376294A1 (fr) * 1976-12-28 1978-07-28 Ouest Cie Bouchon, notamment pour vase d'expansion
DE3045357C2 (de) * 1980-12-02 1986-01-09 Daimler-Benz Ag, 7000 Stuttgart Kühlsystem für eine Brennkraftmaschine
DE3143749A1 (de) * 1981-11-04 1983-05-11 Magirus-Deutz Ag, 7900 Ulm Vorrichtung zur absicherung des wasserdruckes im kuehlwasserkreislauf einer brennkraftmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1488484A (en) * 1974-11-01 1977-10-12 Chrysler Uk Header tanks for coolant radiators

Also Published As

Publication number Publication date
EP0180208A2 (fr) 1986-05-07
DE3574753D1 (de) 1990-01-18
DE3439554A1 (de) 1986-04-30
EP0180208A3 (en) 1987-04-29

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