EP0726386B1 - Expansions- und Entlüftungsbehälter für ein Kühlkreislauf einer Brennkraftmaschine - Google Patents

Expansions- und Entlüftungsbehälter für ein Kühlkreislauf einer Brennkraftmaschine Download PDF

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Publication number
EP0726386B1
EP0726386B1 EP19960460006 EP96460006A EP0726386B1 EP 0726386 B1 EP0726386 B1 EP 0726386B1 EP 19960460006 EP19960460006 EP 19960460006 EP 96460006 A EP96460006 A EP 96460006A EP 0726386 B1 EP0726386 B1 EP 0726386B1
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EP
European Patent Office
Prior art keywords
compartment
wall
fact
tank
liquid
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
EP19960460006
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English (en)
French (fr)
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EP0726386A1 (de
Inventor
Pierre Faivre
Cédric Leclerc
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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Filing date
Publication date
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0726386A1 publication Critical patent/EP0726386A1/de
Application granted granted Critical
Publication of EP0726386B1 publication Critical patent/EP0726386B1/de
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
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/028—Deaeration 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
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/029—Expansion reservoirs

Definitions

  • the present invention relates to an expansion and degassing tank for the coolant of an internal combustion engine, and in particular of a engine fitted to a motor vehicle.
  • Such a tank is an important element of the cooling circuit.
  • the tank also constitutes a reserve capacity allowing compensate for losses by micro-leaks from the circuit, in particular by lack of watertightness various fittings with which the circuit is provided. It also constitutes an expansion volume able to absorb the expansion of the coolant depending on the temperature and pressure conditions. It is also used to fill the circuit and to coolant level check.
  • the objective of the present invention is to provide an expansion tank and degassing which is very effective, while being of a simple design, a moderate cost price, with a small footprint and adapting easily to different models of engines and cooling systems, as well as different vehicle models for application to the automotive industry.
  • the container 14 which is described in the aforementioned document has a liquid inlet consisting of a tube located at the top of the container and oriented tangentially to the circular section and to the wall of the container, as is visible in Figure 3 of the document.
  • Such a device however has a relatively limited effectiveness; of more, the liquid leaving the tank is still turbulent and has a certain energy kinetics, which compromises the proper functioning of the part of the cooling circuit located downstream of the container.
  • the document EP-A-0 561 673 relates to an expansion tank and degassing - called a water box - which is not really made up of two compartments communicating, but which includes a compartment containing an internal conduit. The arrival of liquid in the upper part of it takes place tangentially, and the liquid is subjected to centrifugation there.
  • a rib disposed in the lower part of the internal duct is provided to promote swirling of the liquid and facilitate its flow to the outlet.
  • the present invention relates more precisely to a reservoir formed of two communicating compartments.
  • the device described in FR-A-2 579 668 has a general form of revolution, vertical axis. It is a tank comprising two parts, namely a upper part into which comes the portion of the coolant which comes of the cylinder head and / or of the radiator, and a lower part into which the portion of the coolant from the vehicle's heating circuit, these two parts communicating through an opening provided with an anti-gyratory means.
  • the lower part is connected to an outlet conduit, through which the degassed liquid returns to the pump circulation planned in the cooling circuit.
  • this tank degassing is done using a jet breaker. In its lower part, it is produced by centrifugation, thanks to arrangements tangential to both the supply duct (coming from the heating circuit) and the outlet duct.
  • the tank which is the subject of FR-A-2 600 117 is divided into two compartments arranged in such a way that the smallest of them is connected to a bypass circuit of the main cooling circuit; this allows to reduce the engine warm-up time by significantly reducing the volume of coolant which is used when the engine is cold, the coolant then circulating only in the bypass circuit - and therefore in the small compartment - because the main circuit is cut by a thermostatic valve.
  • the tank according to the present invention comprises two compartments communicating.
  • This tank is remarkable in that one of these compartments - said first compartment - has a wall whose internal surface is a surface of revolution of the vertical axis and is provided with at least one feed nozzle disposed in the upper part and oriented in a direction substantially tangential to said surface so that the liquid to be degassed entering the first compartment is subjected to centrifugation, while the other compartment - says second compartment - has a liquid outlet at the bottom degassed and is provided with a partitioning - called stilling - comprising notched fins which extend vertically in the lower part of the tank, this partitioning being adapted to counteract the gyratory movement of the liquid, while said first and second compartments communicate with each other by openings in the form of notches formed in the lower part, in the wall of the first compartment, and through which the liquid passes from the latter into the second compartment.
  • the liquid to be degassed is stuck against the wall under the effect of centrifugal forces while descending by gravity to inside the compartment, the particles of fluid following a trajectory approximately helical downward, vertical axis.
  • this centrifugation and the vortex movements which it generates are braked, the liquid being still in gyratory motion, but no longer stuck against the wall of the compartment.
  • This residual rotation allows the gas bubbles to rise to the surface under the effect of Archimedes' push.
  • the tranquilization of the movement of liquid In the second compartment, the tranquilization of the movement of liquid, the movement of which is hampered and, at least partially interrupted by the partitioning lining this second compartment.
  • the expansion and degassing tank illustrated in the figures has the form general of a body of revolution having a central cylindrical main portion, of axis vertical ZZ 'and curved upper and lower parts, for example hemispherical.
  • the outer shell of the tank is formed by two half-shells 1 and 3 of the same general shape, placed head to tail, and joined by flanges 13, respectively 33, constituting the edges of their opening, the opening of the half-shell upper 1 being directed downwards while the opening of the half-shell lower 3 is directed upwards.
  • These half-shells are made of molded plastic, for example made of polypropylene, their connection at the flanges 13, 33 being by pressure hot (heat sealing).
  • the cylindrical and curved portions of the upper half-shell 1 have been designated by the references 10 and 11, and by the references 30 and 31 the cylindrical and respectively curved portions of the lower half-shell 3.
  • the bottom 110 of the half - upper shell is provided with a cylindrical neck 12, of axis ZZ ' , acting as a filling orifice for the tank, and intended to receive, in known manner, a shutter plug forming a calibrated pressure valve (safety valve) ; still in known manner, there is provided in the wall of the neck 12 an overflow orifice 120 opening into an evacuating nozzle 14 coming from molding with the neck; the end piece 14 is arranged horizontally, radially with respect to the axis ZZ ' .
  • the half-shell 1 is internally integral with a tubular wall cylindrical 2, coaxial with the cylindrical part 10, and which is tightly connected to the bottom wall 110.
  • the tubular wall 2 has a length greater than the height of the half-shell 1, and therefore extends downwards inside the half-shell lower 3, to the vicinity of the bottom 310 of the latter, at a certain distance from this background.
  • the internal face of the wall 2 has been designated by the reference 26.
  • the end pieces 25 are oriented, in a horizontal plane, in a direction tangential to the inner surface 26 (see Figure 13).
  • the wall 2 is pierced with one or more orifices 200 making the interior communicate with the exterior of the tube.
  • the bottom portion 310 of the lower half-shell 3 is provided with a cylindrical outlet nozzle 32, of axis ZZ '.
  • the wall 2 In its lower part, inside the half-shell 3, the wall 2 is provided on its external face with a vertical well 21, of approximately rectangular section (see Figure 9), fitted with a bottom 210. At the central part of this well, the wall 2 is pierced with a small calibrated hole 22; a similar hole 23 is drilled opposite the hole 22, in the front wall of well 21.
  • the wall 2 is cut at its free lower end, so as to have several notches 20 open at the bottom, of rectangular or square shape.
  • the free edge of the cylindrical wall 2 present on all its periphery a recessed inner portion, into which can fit the disc 40.
  • each side of the disc 40 On each side of the disc 40 are arranged vertical fins 42 constituted by thin lamellae, the width of which corresponds to the clearance close fitting, to the space available between the wall 2 and the wall of the half-shell lower 3 when the disc 40 is in place, to form the bottom of the tubular part 2.
  • Each fin 42 has a lateral notch 420 facing outwards.
  • the two fins 42 are located in the same plane, which is parallel to the axis of the discoid part 40 (axis which corresponds to the axis ZZ ' when the element 4 is in place), but does not contain this axis.
  • These fins 42 extend inwards, under the disc 40, to connect to a part 41; the latter consists of a partition extending downwards under the disc 40 and having a cross section in "U” (see Figures 5 and 6).
  • the partition has a height corresponding to the distance between the end free from the tubular wall 2 of the bottom 310.
  • the middle branch of this "U” has a cutout 410 opening downward; the lateral branches of the "U” have a free edge which has a cut 411 directed downwards.
  • the internal face of the wall of the lower half-shell 3 is provided with two pairs of vertically extending protrusions or slides 35, suitable for being used for interlocking, by longitudinal translation from top to bottom of the fins 42.
  • the slides 35 are notched opposite the notches 420, a notch being referenced 350 to the figure 2.
  • ribs 34 shaped so as to delimit a groove in "U” used for the nesting of the partition 41 when setting place of element 4 in the half-shell 3.
  • the projections 34 are notched opposite the cutout 410 of the partition 41.
  • the assembly of the tank is done first by placing the element 4 in the lower half-shell, then by placing the upper half-shell 1 on the lower half-shell 3, the free edge of the wall 2 then fitting into the discoid part 40; the half-shells 1 and 3 are then fixed to each other by heat sealing.
  • a double-shelled tank comprising a first compartment 5 delimited by the inner cylindrical wall 2, by the upper bottom 110, and by the discoid part 40, and a second compartment 6 constituted by the interior space at half-shells 1 and 3 and outside part 5 and bottom 40.
  • this reservoir only consists of three separate parts, of molded plastic such as polypropylene, the cost of which is relatively small.
  • the material chosen is preferably transparent or translucent, of so that it is possible to see the level of liquid inside the tank without opening the shutter cap.
  • 100 graduations are provided on the wall of the tank, which indicate the volume of liquid in it.
  • the tank has the shape of a compact box, whose general cylindrical shape with convex ends has the advantage of withstanding internal pressure constraints.
  • the tank is connected to the cooling circuit of the internal combustion engine, between the cylinder head outlet and / or the radiator and the inlet of the motor.
  • the inlet ends 25 and the outlet end 32 are of the standardized type, allowing their connection to the tubing of the circuit.
  • detection members such as electrodes for example, making it possible to check that the level of the liquid contained in the tank remains between minimum values and predetermined maximum; if this is not the case, these detection devices generate a signal warning the user, for example by means of an indicator provided on the control panel on board the vehicle.
  • the coolant is introduced into the circuit through the neck 12.
  • the tank is placed in an upper zone of the circuit, so as to put the latter under load (under pressure).
  • the level N of the coolant is visible through the wall of the tank.
  • the liquid arrives in the reservoir through the nozzles 25, as is symbolized by the arrows A in FIGS. 12 and 13.
  • This liquid is charged with gas, and in particular with air, which have been captured in the cooling circuit, in particular in the engine or in the radiator. It opens tangentially in the upper part of compartment 5, and is therefore subjected to centrifugation, which presses it against the internal face 26 of the cylindrical wall 3. The intensity of the centrifugal forces being different on the liquid phase and on the gas phase, a rapid separation of the gases is thus obtained, which go up into the compartment 5 and are then evacuated outside the tank by the shutter plug BO and by the overflow orifice 120.
  • the liquid follows an approximately helical downward trajectory symbolized by the line B. This liquid falls back into the mass of liquid L 1 contained in the compartment 5. It is then always in rotation, but is no longer stuck to the tubular wall 2. This residual rotation, which is symbolized by the line C in Figure 12, allows the gas bubbles which are still in the liquid to rise to the surface under the effect of Archimedes' push.
  • the liquid then leaves compartment 5 through the openings 20, as symbolized by the arrows E , to end up outside the tube 2, in the second compartment 6, joining the liquid L 2 present in the latter.
  • the liquid is slowed down by the baffled partitioning consisting on the one hand by the fins 42 arranged laterally and by the "U" partition 41 arranged under the bottom 40.
  • the liquid nevertheless manages to pass, in particular through the notches of fins 420 (arrows F ), through the notch 410 of the lower partition 41 (arrow F ' ) and bypassing the walls of the lower partition 41 (arrows G ). It thus arrives in the interior space of the "U" partition 41, where the orifice 321 of the inlet of the outlet nozzle 32 is located.
  • the role of the orifice (orifices) 200 is to allow free communication of air between compartments 5 and 6, which is necessary to obtain the balance of levels in these compartments.
  • the detection well 21 is an area of the reservoir which is not subject to the general flow of liquid passing through it.
  • the two calibrated orifices 22 and 23 provide a damping of variations in the level of liquid which avoids untimely detections.
  • the tranquilization partitioning which prevents the liquid leaving the tank by the circuit 32 loading nozzle is not in a state of turbulence a also has the effect of limiting fluid movements due to accelerations that it undergoes during the running of the vehicle, which thus avoids a planing of the orifice of charging 320, and the aspiration of air by it.

Claims (14)

  1. Expansions- und Entlüftungsbehälter für die Kühlflüssigkeit eines Verbrennungsmotors, welcher zwei miteinander in Verbindung stehende Einheiten umfasst, dessen eine Einheit (5) - erste Einheit genannt - eine Wandung hat, deren Innenfläche (26) eine Rotationsfläche um eine Vertikalachse (ZZ') ist und die mit mindestens einem Zufuhr-Ansatzstück ausgestattet ist, welches im oberen Bereich angeordnet ist und sich im Verhältnis zu der besagten Fläche (26) in eine praktisch tangentiale Richtung erstreckt, dergestalt, dass die in diese erste Einheit einfliessende zu entlüftende Flüssigkeit einer Zentrifugierung unterworfen wird, dadurch gekennzeichnet, dass die andere Einheit (6) - zweite Einheit genannt - an ihrer Unterseite mit einem Ansatzstück (32) zum Ablassen der entlüfteten Flüssigkeit ausgestattet ist und mit einer Unterteilung (41, 42) - zur sogenannten Beruhigung - die aus Rippen (42) mit Nuten besteht, welche sich senkrecht im unteren Teil des Behälters erstrecken, versehen ist, die dazu vorgesehen ist, der Wirbelbewegung der Flüssigkeit entgegenzuwirken, während die besagte erste Einheit und zweite Einheit (5, 6) mittels an der Unterseite der Wandung (2) der ersten Einheit (5) angeordneten nutenförmigen Öffnungen (20) miteinander in Verbindung stehen, durch welche die Flüssigkeit von der letztgenannten Einheit in die zweite Einheit (6) gelangt.
  2. Behälter gemäss Anspruch 1, dadurch gekennzeichnet, dass die Wandung der besagten zweiten Einheit eine Rotationsform aufweist, die mit der ersten (5) eine gemeinsame Achse hat und die letztgenannte umschliesst.
  3. Behälter gemäss Anspruch 2, dadurch gekennzeichnet, dass die erste Einheit (5) eine röhrenförmige Wandung (2) hat, die zylinderförmig ist, wohingegen die Wandung (1, 3) der zweiten Einheit aus einem zylinderförmigen Hauptteil (10-30) und halbkugelförmigen Endteilen (11-31) besteht.
  4. Behälter gemäss Anspruch 3, dadurch gekennzeichnet, dass sich die Wandung (2) der besagten ersten Einheit (5) entlang der Achse und nach unten bis in die Nähe des Bodens (310) der zweiten Einheit (6) erstreckt.
  5. Behälter gemäss Anspruch 4, dadurch gekennzeichnet, dass die Wandung (2) der besagten zweiten Einheit (6) aus zwei Halbschalen gebildet ist, die eine Rotationsform (1, 3) haben, aus Kunststoff gegossen sind, aneinander in einer eine Kugel ausbildenden Anordnung befestigt sind, und die zylinderförmige Wandung (2) der ersten Einheit ein integrierter Teil einer (1) der beiden ist.
  6. Behälter gemäss Anspruch 5, dadurch gekennzeichnet, dass die Wandung (2) der besagten ersten Einheit ein integrierter Teil der oberen Halbschale (1) ist, an welche sie sich dicht im oberen Bereich auf Bodenebene (110) anschliesst.
  7. Behälter gemäss Anspruch 6, dadurch gekennzeichnet, dass die besagte obere Halbschale mit mindestens einem an ihrem oberen Teil angebrachten Einfüllstutzen (12) und mindestens einem Zufuhr-Ansatzstück (25) ausgerüstet ist, die alle beide in die erste Einheit (5) münden.
  8. Behälter gemäss einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass die besagte untere Halbschale (3) an ihrem Boden (310) mit besagtem Ablass-Ansatzstück (32) ausgestattet ist, wobei dieses letztgenannte eine insgesamt zylindrische Form um die gleiche Achse hat wie die Drehachse (ZZ') der Halbschalen.
  9. Behälter gemäss einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass die besagte Unterteilung zur Beruhigung aus einem diskusförmigen Stück am unteren Ende der röhrenförmigen Wandung (2) der ersten Einheit (5) angepasst ist, so dass sie den Boden bildet, und besagte nutenförmige Öffnungen (20), welche die beiden Einheiten (5, 6) miteinander verbinden, auf dieser Höhe in der Wandung angeordnet sind.
  10. Behälter gemäss Anspruch 9, dadurch gekennzeichnet, dass sich die besagten Rippen mit Nuten (42) in dem ringförmigen Raum befinden, der die röhrenförmige Wandung (2) der ersten Einheit von der Wandung der unteren Halbschale trennt.
  11. Behälter gemäss Anspruch 9 oder 10, dadurch gekennzeichnet, dass die besagte Unterteilung zur Beruhigung eine Abteilungs-Trennwand (41) in "U"-Form mit senkrechten Seitenwänden umfasst, die unterhalb des besagten diskusförmigen Teils (40) angeordnet ist und sich auf den Boden (310) der unteren Halbschale (3) stützt und die Seitenwände dieser Trennwand (41) die Eingangsöffnung des Ablass-Ansatzstückes (32) umgeben.
  12. Behälter gemäss einem der Ansprüche 2 bis 11, dadurch gekennzeichnet, dass er einen Schacht zur Ermittlung der Füllhöhe (21) hat, welcher mit der Wandung (2) der ersten Einheit aus einem Stück ist und an der Aussenseite derselben in der unteren Hälfte des Behälters angeordnet ist.
  13. Behälter gemäss einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass er aus transluzentem Polypropylen gegossen ist und an seiner Aussenwandung eine Skala (100) zum Ablesen des Flüssigkeitspegels aufweist.
  14. Behälter gemäss einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass die besagten Einheiten (5, 6) an ihrem oberen Teil mittels einer oder mehrerer Öffnungen (200) in Verbindung stehen, welche den Ausgleich der Pegel in den beiden Einheiten sichern.
EP19960460006 1995-02-07 1996-02-05 Expansions- und Entlüftungsbehälter für ein Kühlkreislauf einer Brennkraftmaschine Expired - Lifetime EP0726386B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9501605 1995-02-07
FR9501605A FR2730272B1 (fr) 1995-02-07 1995-02-07 Reservoir d'expansion et de degazage pour circuit de refroidissement d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP0726386A1 EP0726386A1 (de) 1996-08-14
EP0726386B1 true EP0726386B1 (de) 2001-11-21

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EP19960460006 Expired - Lifetime EP0726386B1 (de) 1995-02-07 1996-02-05 Expansions- und Entlüftungsbehälter für ein Kühlkreislauf einer Brennkraftmaschine

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EP (1) EP0726386B1 (de)
DE (1) DE69617066T2 (de)
ES (1) ES2167530T3 (de)
FR (1) FR2730272B1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2360838B (en) * 2000-03-31 2004-04-07 Rover Group Cooling system expansion tank
US6843209B2 (en) * 2001-06-20 2005-01-18 Honda Giken Kogyo Kabushiki Kaisha Engine cooling water passage structure and gas/liquid separator for engine cooling system
FR2841187B1 (fr) * 2002-06-21 2004-08-27 Cf Gomma Spa Dispositif et procede de degazage pour vehicule automobiles
DE10231480A1 (de) * 2002-07-12 2004-01-29 Dr.Ing.H.C. F. Porsche Ag Ausgleichsbehälter für einen Kühlkreislauf einer Brennkraftmaschine
FR2848621B1 (fr) * 2002-12-11 2006-03-17 Mark Iv Systemes Moteurs Sa Boite de degazage et procede de fabrication d'une telle boite
GB2403163B (en) * 2003-06-23 2006-12-20 Ford Global Tech Llc Cooling system expansion tank
FR2861133B1 (fr) * 2003-10-17 2007-06-22 Mark Iv Systemes Moteurs Sa Boite de degazage a structure simplifiee
DE102007002453A1 (de) * 2007-01-11 2008-07-17 Bombardier Transportation Gmbh Entlüftung für einen Flüssigkeitskreislauf
GB2455743B (en) * 2007-12-20 2012-10-10 Ford Global Tech Llc Cooling system expansion tank
CH706212B1 (de) * 2012-03-08 2015-12-15 Schwanden Kunststoff Ausgleichsbehälter für ein Kühlsystem einer Verbrennungskraftmaschine.
KR20200020205A (ko) * 2018-08-16 2020-02-26 엘지전자 주식회사 히트 펌프 시스템
FR3113698B1 (fr) * 2020-08-28 2022-08-12 Hutchinson Dispositif de séparation par effet vortex pour un circuit de transfert de fluide
US11618343B2 (en) 2020-11-04 2023-04-04 Ford Global Technologies, Llc Deaeration devices for electrified vehicle thermal management systems
KR20220144156A (ko) * 2021-04-19 2022-10-26 현대자동차주식회사 차량의 통합 열관리 모듈
WO2024003592A1 (en) * 2022-06-27 2024-01-04 Volvo Truck Corporation Degassing system for vehicle cooling system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5139082A (en) * 1990-08-31 1992-08-18 Teledyne Industries, Inc. Cooling system for a liquid cooled engine
FR2688449B1 (fr) * 1992-03-16 1994-06-17 Peugeot Circuit de liquide pour echangeur de chaleur associe a un moteur de vehicule automobile.

Also Published As

Publication number Publication date
DE69617066D1 (de) 2002-01-03
EP0726386A1 (de) 1996-08-14
ES2167530T3 (es) 2002-05-16
FR2730272A1 (fr) 1996-08-09
FR2730272B1 (fr) 1997-04-25
DE69617066T2 (de) 2002-08-22

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