EP0888494A1 - Systeme de refroidissement pour moteur a combustion interne refroidi par fluide - Google Patents

Systeme de refroidissement pour moteur a combustion interne refroidi par fluide

Info

Publication number
EP0888494A1
EP0888494A1 EP97914252A EP97914252A EP0888494A1 EP 0888494 A1 EP0888494 A1 EP 0888494A1 EP 97914252 A EP97914252 A EP 97914252A EP 97914252 A EP97914252 A EP 97914252A EP 0888494 A1 EP0888494 A1 EP 0888494A1
Authority
EP
European Patent Office
Prior art keywords
valve
coolant
cooling system
pressure
chamber
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
EP97914252A
Other languages
German (de)
English (en)
Other versions
EP0888494B1 (fr
Inventor
Werner Lugs
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 EP0888494A1 publication Critical patent/EP0888494A1/fr
Application granted granted Critical
Publication of EP0888494B1 publication Critical patent/EP0888494B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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

Definitions

  • the invention is based on the preamble of claim 1 of EP-A 0295445.
  • the container through which a flow line is used serves to separate the air and fuel gas from the coolant, the separated gases being used by means of a pressure relief valve in a valve unit which is elastically supported against a closure of the filler neck of this container and an atmospheric compensation, Storage and air lock containers are supplied.
  • this expansion tank contains an expansion volume which is filled by a gas poister under a predetermined excess pressure.
  • elastic connecting hoses between the internal combustion engine and the cooler can be used as additional compensating devices, as is known per se, for example, from US 3208438.
  • Expansion tanks with at least partially elastically compliant devices are known from US 3238932 and DD-PS 136280.
  • the pressure is built up in the respective cooling system by compressing a buffer air / gas volume, preferably in the expansion tank.
  • the disadvantage here is a relatively large expansion volume in order to be able to absorb the increase in volume of the coolant even under extreme temperature conditions, such as, for example, reheating when the internal combustion engine is switched off hot, in order to prevent possible coolant ejection or loss of coolant.
  • the pressure build-up is also largely determined by the volume distribution in the expansion tank between the coolant supply and the buffer air / gas volume, a minimum fill level in the expansion tank is also required, taking leakage and evaporation losses into account.
  • the requirement for a large buffer air / gas volume and a sufficient minimum supply of coolant results in a relatively large expansion tank which is difficult to place due to its space requirement in the engine compartment and which may result in unfavorable line arrangements.
  • the object of the invention is to improve the generic cooling system in such a way that the pressure required in the cooling system to avoid premature sealing and to avoid pump cavitation is achieved without a prestressed buffer air / gas volume.
  • valve unit formed from overpressure and venting and return valve in the valve stub of the supply line enables rapid cold filling of the entire cooling system with rapid, reliable venting.
  • the use of a detachably arranged insert in the filler neck in connection with the pressureless coolant supply in the case of a warm cooling system has the advantage that opening the supply chamber without loss of pressure in the cooling system and without risk for the controller by means of coolant ejection means a check of the coolant supply and, if necessary, a check Hot filling is possible.
  • a venting and return valve connecting the equalization chamber with the plenum chamber and a venting and return valve connecting the flow line of the cooling system with the plenum chamber are each designed as a thermal valve, starting from a predetermined one Prevent operating temperature of gas and coolant exchange and thus advantageously contribute to a safe opening of the coolant supply chamber.
  • claim 5 describes the displaceable limitation of the compensation chamber as a displacer piston arranged with the latter in a coolant-tight manner via a bellows and which is acted upon by a prestressed compression spring.
  • the pretension of the compression spring can be selected such that there is a correspondingly small displacement of the displacer piston until the pressure generated by the thermally induced change in volume of the coolant in the cooling system is reached.
  • FIG. 1 shows a cooling system of a liquid-cooled internal combustion engine
  • FIG. 2 shows a filling, venting and pressure control device according to the invention
  • FIG. 3 prepares the seal according to FIG. 3 for cold filling
  • FIG. 4 shows the device according to FIG. 3 during engine operation
  • 5 shows the device according to FIG. 3 with hot filling, for example while the machine is running
  • a cooling system 1 for a liquid-cooled internal combustion engine 2 comprises a flow 3 to the cooler 4 and from there back to the internal combustion engine 2 a return 5, which is connected to a housing 6 of a thermostat 7.
  • the coolant flows out of the housing 6 with the thermostat 7 closing the short circuit 8 due to the operation, via a suction line 9 to a pump 10 which conveys the coolant into the internal combustion engine 2.
  • a filling, venting and pressure control device 11 according to the invention is arranged in advance 3 between internal combustion engine 2 and cooler 4.
  • the device 11 comprises a container 12, through which a flow line 13 connected to the flow line 3 passes.
  • the Vorlauf ⁇ line 13 has a fixed valve socket 14, which is arranged to penetrate a partition 15 of the container 12 and with its valve opening 16 opens into a chamber 17 for an atmospheric coolant pre-18.
  • the container 12 has a further, geodetically lower chamber 19 which serves to compensate for coolant volume by means of a displacement piston 21 which can be displaced against the elastic resistance of a compression spring 20.
  • the displacer piston 21 is assigned to the compensating chamber 19 in a coolant-tight manner by means of a rolling bellows 22.
  • This equalizing chamber 19 is connected via a connecting piece 23 and a line 23 'to the pump suction line 9 shown in FIG. 1 in a coolant-carrying connection.
  • the compensation chamber 19 is connected to the coolant supply chamber 17 via a temperature-controlled vent and return valve 24.
  • Such thermal valves are known to be, for example, with a bimetal element equipped, which brings a ball valve into the closed position and holds after exceeding a predetermined temperature.
  • valve stub 14 of the flow line 13 is for controlling the valve opening
  • a valve unit 25 is arranged such that it can be displaced against the resistance of a spring 28 which is supported against an insert 27 which is screwed into a filler neck 26 of the receiving chamber 17.
  • the valve unit 25 itself serves to control the system pressure of the cooling system 1 as a pressure relief valve 29 opening into the atmospherically ventilated coolant supply chamber 17.
  • the valve unit 25 further comprises a venting and return valve 30, which, as a thermostatic valve, a configuration between the supply chamber
  • a closure 32 of the filler neck 26 of the supply chamber 17 comprises, in addition to the screw-in, pot-shaped insert 27, a closure cover 33 with a vent hole 34 that can be screwed to this insert 27.
  • the pot-like insert 27 also has the stop 28 of the valve unit 25 as a spring - Bottom 35 of a control opening 36 which serves to control the hot fill level in the supply chamber 17 and ventilation channels 38 arranged in the peripheral part 37 close to the closure cover.
  • FIG. 3 shows the device 11 in operation of the internal combustion engine 2, the valves 24 and 30 being considered closed.
  • the arrangement according to the invention in the device 11 advantageously provides a warm filling of the cooling system 1 without loss of the system pressure and without risk of coolant ejection according to FIG. 5 in that when the valve unit 25 is inserted and is elastically supported against the screwed-in insert 27 with the thermally valve 30 being effectively closed, only the cover 33 to the atmospheric supply chamber 17 is to be removed for a possible coolant refill via the control opening 36 in the bottom 35 of the insert 27.
  • the system pressure is maintained, the missing coolant after the opening of the two Vent and return valves 24 and 30 can escape air inclusions in the course of the next cooling process in internal combustion engine 2 and cooler 4, as shown in FIG. 6.
  • Figure 6 shows a particular degassing process during a cooling process of the cooling system 1 after the internal combustion engine 2 has been switched off, air and combustion gases through the opened valves 24 and 30 and via the unpressurized supply chamber 17 through the venting channels 38 and the venting bore 34 in the sealing cover 33 escape into the atmosphere and then coolant penetrates from the plenum 17 into the cooling system 1.
  • the filling, venting and pressure control device 11 according to the invention has the following advantages in summary:

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Temperature-Responsive Valves (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Safety Valves (AREA)

Abstract

L'invention concerne le système de refroidissement d'un moteur à combustion interne refroidi par fluide, pour lequel il est prévu un dispositif de remplissage, de ventilation et de commande de pression dans lequel une contrainte de compression produite mécaniquement dans le fluide de refroidissement est combinée avec une opération de commande de la pression du système dans la conduite d'arrivée, la diminution de la pression étant obtenue dans une réserve de fluide de refroidissement soumis à l'action de l'air et par conséquent exempt de pression. Ce dispositif permet d'une part de remplir rapidement, à froid, le système de refroidissement avec le fluide de refroidissement et d'autre part de contrôler le niveau du fluide de refroidissement à température de fonctionnement dans le réservoir, sans perte de pression et sans risque de projections de fluide de refroidissement.
EP97914252A 1996-03-21 1997-03-15 Systeme de refroidissement pour moteur a combustion interne refroidi par fluide Expired - Lifetime EP0888494B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19611095A DE19611095A1 (de) 1996-03-21 1996-03-21 Kühlsystem für eine flüssigkeitsgekühlte Brennkraftmaschine
DE19611095 1996-03-21
PCT/EP1997/001318 WO1997035101A1 (fr) 1996-03-21 1997-03-15 Systeme de refroidissement pour moteur a combustion interne refroidi par fluide

Publications (2)

Publication Number Publication Date
EP0888494A1 true EP0888494A1 (fr) 1999-01-07
EP0888494B1 EP0888494B1 (fr) 2000-06-28

Family

ID=7788940

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97914252A Expired - Lifetime EP0888494B1 (fr) 1996-03-21 1997-03-15 Systeme de refroidissement pour moteur a combustion interne refroidi par fluide

Country Status (6)

Country Link
US (1) US6125800A (fr)
EP (1) EP0888494B1 (fr)
JP (1) JP2000509454A (fr)
DE (2) DE19611095A1 (fr)
ES (1) ES2148949T3 (fr)
WO (1) WO1997035101A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2640661C1 (ru) * 2017-02-14 2018-01-11 Марк Евгеньевич Дискин Система жидкостного охлаждения

Families Citing this family (8)

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FI116803B (fi) * 2001-04-27 2006-02-28 Crane John Safematic Oy Sovitelma mekaanisen tiivisteen yhteydessä
ATE470120T1 (de) * 2005-03-18 2010-06-15 Behr Gmbh & Co Kg Wärmetauscher mit entlüfter
DE102008019227B4 (de) 2008-04-17 2010-05-12 Audi Ag Verfahren und Vorrichtung zur Kompensation der thermischen Volumenausdehnung in einem Kühlmittelkreislauf einer flüssigkeitsgekühlten Brennkraftmaschine
DE102010018089B3 (de) * 2010-04-24 2011-07-14 Audi Ag, 85057 Ventilanordnung zur Entlüftung eines Kühlmittelkreislaufs einer Brennkraftmaschine
DE102010033715A1 (de) * 2010-08-07 2012-02-09 Audi Ag Ausgleichsbehälter für einen Kühlmittelkreislauf
DE102013226420A1 (de) 2013-12-18 2015-06-18 Volkswagen Aktiengesellschaft Entlüftungsventil und Kühlsystem für eine Brennkraftmaschine
CN204187069U (zh) * 2014-10-23 2015-03-04 讯凯国际股份有限公司 补水结构、具有该补水结构的泵及液冷散热装置
JP2022054600A (ja) * 2020-09-28 2022-04-07 いすゞ自動車株式会社 車載タンクのキャップ

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DE136280C (fr) *
US3208438A (en) * 1964-03-20 1965-09-28 Ford Motor Co Cooling system for an internal combustion engine
US3238932A (en) * 1964-03-30 1966-03-08 Ford Motor Co Sealed cooling system for an internal combustion engine
US4052965A (en) * 1975-10-28 1977-10-11 Caterpillar Tractor Co. Engine cooling system vent means
US4167159A (en) * 1977-04-29 1979-09-11 Deere & Company Pressurized liquid cooling system for an internal combustion engine
DD136280A1 (de) * 1978-02-13 1979-06-27 Guenter Wagenlehner Fluessigkeitskuehlung mit geschlossenem kreislauf,insbesondere fuer verbrennungsmotoren
DE3143749A1 (de) * 1981-11-04 1983-05-11 Magirus-Deutz Ag, 7900 Ulm Vorrichtung zur absicherung des wasserdruckes im kuehlwasserkreislauf einer brennkraftmaschine
FR2529951A1 (fr) * 1982-07-08 1984-01-13 Renault Vehicules Ind Dispositif de pressurisation du circuit de refroidissement d'un moteur thermique
DE3226508C2 (de) * 1982-07-15 1985-12-12 Bayerische Motoren Werke AG, 8000 München Kühlkreis für Brennkraftmaschinen
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
US4776390A (en) * 1985-09-24 1988-10-11 Cummins Engine Company, Inc. Venting filler cap
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
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2640661C1 (ru) * 2017-02-14 2018-01-11 Марк Евгеньевич Дискин Система жидкостного охлаждения

Also Published As

Publication number Publication date
WO1997035101A1 (fr) 1997-09-25
DE59701936D1 (de) 2000-08-03
ES2148949T3 (es) 2000-10-16
US6125800A (en) 2000-10-03
JP2000509454A (ja) 2000-07-25
EP0888494B1 (fr) 2000-06-28
DE19611095A1 (de) 1997-09-25

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