EP3032064B1 - Reservoir compensateur pour les liquides de refroidissement de moteurs a combustion interne refroidis par liquide - Google Patents

Reservoir compensateur pour les liquides de refroidissement de moteurs a combustion interne refroidis par liquide Download PDF

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Publication number
EP3032064B1
EP3032064B1 EP15002877.7A EP15002877A EP3032064B1 EP 3032064 B1 EP3032064 B1 EP 3032064B1 EP 15002877 A EP15002877 A EP 15002877A EP 3032064 B1 EP3032064 B1 EP 3032064B1
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EP
European Patent Office
Prior art keywords
expansion tank
air
coolant
volume
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.)
Active
Application number
EP15002877.7A
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German (de)
English (en)
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EP3032064A1 (fr
Inventor
Dietmar Hügel
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.)
MAN Truck and Bus SE
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MAN Truck and Bus SE
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Publication date
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Publication of EP3032064A1 publication Critical patent/EP3032064A1/fr
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Publication of EP3032064B1 publication Critical patent/EP3032064B1/fr
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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
    • F01P11/14—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
    • 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
    • F01P11/0285—Venting 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
    • F01P11/04—Arrangements of liquid pipes or hoses

Definitions

  • the invention relates to an expansion tank for the cooling liquid of a liquid-cooled machine, in particular an internal combustion engine of a vehicle.
  • Expansion tanks for the cooling liquid of the type mentioned at the outset are known from practice, which serve to hold the expanding cooling liquid.
  • Figure 1 shows such a known expansion tank 10 in a highly schematic view.
  • the expansion tank 10 is usually installed so that it represents the highest point in the cooling system.
  • the expansion tank 10 has an inflow connection arranged in the lower region of the expansion tank 10 and an outflow connection for connecting the expansion tank 10 to the cooling circuit of the internal combustion engine (not shown in each case).
  • the expansion tank 10 also has a filler neck 4 arranged in the upper region of the expansion tank, which has a lower edge 9 spaced from the expansion tank ceiling 14 to limit the fill level.
  • a valve 5 sealing the filler neck 4 is provided, which serves to secure the cooling system against excess pressure and via which the expansion tank 10 can be filled with the coolant 1.
  • the maximum filling of the expansion tank 10 usually corresponds to a filling when the engine is cold with coolant 1 to the lower edge 9 of the filling nozzle 4, as in FIG Figure 1 shown.
  • a pre-pressure in the air volume 2 of the expansion tank 10 then arises due to the heating and consequent expansion of the coolant.
  • Pressure compensation in the cooling system takes place via valve 5 in the expansion tank closure cover.
  • An increase in the coolant temperature leads to an increase in pressure in the cooling system because the coolant expands.
  • the pressure in the expansion tank 10 increases, whereupon the pressure relief valve 5 in the closure lid opens and air and possibly also coolant can escape.
  • a negative pressure develops in the cooling system. Coolant is sucked back out of the container 10. This also creates a negative pressure in the container 10.
  • the vacuum compensation valve in the closure lid of the container 10 opens. Air flows into the container 10 until pressure compensation is achieved.
  • the outer skin or outer wall of the expansion tank 30 is designated by the reference number 3.
  • Conventional expansion tanks 10 have a fixedly defined air volume 2 when they are filled to the maximum with coolant 1. If internal combustion engines with different cooling circuits are to be equipped with the same expansion tank 10, this has the following disadvantages: In cooling circuits with low heat input, there is not sufficient pre-pressure. In contrast, in cooling circuits with high heat input, the admission pressure is controlled via the valve 5, or coolant is ejected. These disadvantages can be avoided by providing different expansion tanks, which are each adapted to the special cooling circuits in which they are used. However, this increases the number of variants and thus the development and component costs.
  • a surge tank which provides an elastic membrane which can be filled with air from outside the surge tank.
  • the disadvantage of this is that the volume of the membrane is dependent not only on the air volume contained, but also on the pressure, so that it is not possible to adjust the air volume independently of pressure.
  • the pamphlets DE 42 19 892 A1 and DE 10 2010 009 757 A1 each disclose structurally complex expansion tanks with switchable air volume lying outside the expansion tank. From the US 3,076,479 A a surge tank is known which has two elastic air intake bubbles inside.
  • the object of the invention is, in particular, to provide an expansion tank which can be better adapted to the requirements of different cooling circuits.
  • the invention is also based on the object of a more cost-effective design of such an expansion tank.
  • the expansion tank according to the invention for the cooling liquid of a liquid-cooled machine has, in accordance with the prior art, at least one inflow connection arranged in the lower region of the expansion tank and an outflow connection for connecting the expansion tank to a cooling circuit of the internal combustion engine.
  • the expansion tank further comprises a filler neck arranged in the upper region of the expansion tank, which has a lower edge spaced from a ceiling of the expansion tank to limit the fill level, and at least one valve sealing the filler neck for filling the expansion tank and securing the cooling system against excess pressure.
  • the liquid-cooled machine can in particular be a liquid-cooled internal combustion engine of a vehicle.
  • a highlighted application relates to a machine-operated watercraft or a commercial vehicle
  • an air volume remaining in the expansion tank when the expansion tank is filled to the maximum with cooling liquid, ie. H. is variably definable.
  • a low air volume can be set in cooling circuits with low heat input so that a sufficiently high admission pressure builds up.
  • a high volume of air can be set so that an upstream pressure is not built up or so that no coolant is ejected.
  • the expansion tank with variable air volume can thus be used as a uniform component in cooling circuits, which differ due to their nature, in particular their coolant heat input.
  • a particular advantage of the invention is thus the increased flexibility in the admission pressure setting in the cooling circuits and the cost savings through standardization or reduction of variants, since a component can be adapted for use in different cooling circuits or cooling systems.
  • At least one air chamber hereinafter also referred to as an air pocket, is provided in the expansion tank, having an air inlet opening in the interior of the expansion tank above the lower edge of the filler neck, which can be opened and closed with an associated closure device.
  • the arrangement of the outlet opening above the lower limit of the filler neck always ensures the same maximum filling when the expansion tank is filled with coolant.
  • one or more air pockets can be provided, each of which can be brought into fluid communication with the base gas volume of the expansion tank with the associated closure device (closure member) increase the gas volume in the expansion tank. In the closed position of the closure member, the air pocket is closed, so that the gas volume available is not increased.
  • the at least one air chamber is arranged on the inside in the upper region of the expansion tank.
  • the at least one air chamber can also be arranged outside the expansion tank and connected to the upper region of the expansion tank via a hose or pipeline. This variant offers the advantage of a modular design.
  • the expansion tank can have at least two air chambers.
  • the number and volume of the air chambers can be determined depending on the desired air volume gradation.
  • One possibility of the implementation according to the invention provides that the internal volume of the air chambers is of different sizes. However, the internal volume of the air chambers can also be of the same size.
  • the locking device assigned to an air chamber can be designed as a locking screw, a locking cover or a flap. This enables a cost-effective design variant to manually set the available volume for the air in the expansion tank.
  • the closure device can be designed as a check valve, as a spring-loaded valve or as a pneumatically or electrically controlled valve. This offers the advantage that the air chambers can be opened and closed in a pressure-dependent and / or automated manner, in particular while the cooling circuit is in operation.
  • the air inlet opening of the at least one air chamber in such a way that no coolant can enter the at least one air chamber when the expansion tank is in operation when it is open.
  • a separate channel guide and / or a spray screen is provided for this.
  • Another aspect of the invention relates to a utility vehicle or a ship with a surge tank as disclosed herein.
  • the expansion tank 20 and 30 shown lies in the additionally provided two air pockets 6, each of which has an associated closure member 7, with which each air pocket 6 can be optionally opened or closed.
  • an air pocket 6 is in fluid communication with the base gas volume of the expansion tank 20 or 30.
  • Each of the air pockets 6 has an air inlet opening 8, which lies above the lower edge 9 of the filler neck 4 in the upper inner region of the expansion tank and is closed with the closure member 7 can.
  • the respective air pocket is fluidly connected to the upper interior of the expansion tank, so that air can flow into the open air pocket 6 from the base volume.
  • the locking member 7 is designed as a locking screw.
  • the expansion tank 30 further comprises, as already explained above, a filler neck 4 arranged in the upper region of the expansion tank 30, which has a lower edge 9 spaced from the top of the expansion tank ceiling 14, and a filler neck 4 sealing the filler neck 4 Valve 5, which serves to secure the cooling system against excess pressure and via which the expansion tank 30 can be filled with the coolant 1.
  • An overflow pipe 16 is arranged below the valve 5, through which cooling liquid can flow out when the valve 5 is opened.
  • a connection 15 for a level probe for level measurement and a connection 17 for the pre-pressure measurement are also provided.
  • a baffle element which is preferably designed as a partition 13, is provided in the lower inner region of the compensating container 30 in order to improve the air bubble separation.
  • a partition has the function of changing the flow direction of the liquid and increasing the flow of the coolant in the expansion tank in order to separate as much air as possible.
  • the two air chambers 6 are provided, the air inlet opening 8 of which can be closed or opened with a screw plug 7.
  • the screw head protrudes from the top of the expansion tank 30 and can be operated from the outside.
  • the air chambers 6 can be opened in order to vary the volume available in the interior of the expansion tank for the air in the expansion tank and to optimally adapt it to the existing cooling circuit.
  • the required air volume is first determined as a function of the coolant expansion, the required admission pressure and the opening pressure of the valve 5.
  • the required volume of air is set in the expansion tank by the base volume, i.e. that is, all air pockets 6 are closed, or possibly by the base volume and the determined number of air pockets 6 required, if an increased air volume has been determined.
  • the required number of air pockets 6 is then optionally opened by means of the screw plug 7, ie fluidly connected to the base volume.
  • the cooling circuit is then filled with coolant up to the lower edge 9 of the filler neck 4 for the first filling.
  • the engine is then operated until the cooling circuit is completely vented to remove any air bubbles that may still be present in the cooling circuit.
  • coolant is refilled with the engine cold, again up to the lower edge 9 of the filler neck 4.
  • the admission pressure is measured via the connection 17 in real engine operation in order to check the functioning of the expansion tank 30. If the pre-pressure is too high or if it is blown off too soon via the valve 5, a further air pocket 6 can be opened. If the inlet pressure is too low, an air pocket 6 can be closed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)

Claims (7)

  1. Récipient de compensation (20 ; 30) destiné au liquide de refroidissement d'une machine refroidie par liquide, en particulier un moteur à combustion interne refroidi par liquide d'un véhicule, le récipient de compensation comprenant :
    au moins un raccord d'entrée (11) disposé dans la région inférieure du récipient de compensation (20 ; 30) et un raccord de sortie (12) destiné à relier le récipient de compensation (20 ; 30) à un circuit de refroidissement de la machine ;
    une tubulure de remplissage (4) disposée dans la région supérieure du récipient de compensation et comportant un bord inférieur (9), espacé d'un couvercle de récipient de compensation (14), pour limiter le niveau de remplissage ;
    au moins une soupape (5) fermant de façon étanche la tubulure de remplissage (4) et destinée à remplir le récipient de compensation (20 ; 30) et à sécuriser le système de refroidissement contre la surpression ;
    un volume d'air (2), restant lors d'un remplissage maximum du récipient de compensation (20 ; 30), étant réglable dans le récipient de compensation (20 ; 30) ;
    au moins une chambre à air (6) étant prévue dans le récipient de compensation (20 ; 30) pour régler le volume d'air restant ;
    l'au moins une chambre à air (6) comportant une ouverture d'entrée d'air (8) qui est située au-dessus du bord inférieur (9) de la tubulure de remplissage (4) à l'intérieur du récipient de compensation (20 ; 30) et qui peut être ouverte et fermée à l'aide d'un dispositif de fermeture associé (7) ;
    caractérisé en ce que l'au moins une chambre à air (6) est disposée à l'intérieur dans la région supérieure du récipient de compensation (20 ; 30).
  2. Récipient de compensation (20 ; 30) selon la revendication 1, caractérisé par au moins deux chambres à air (6).
  3. Récipient de compensation (20 ; 30) selon la revendication 2, caractérisé en ce que les chambres à air (6) ont le même volume intérieur ou des volumes intérieurs différents.
  4. Récipient de compensation (20 ; 30) selon l'une des revendications précédentes, caractérisé en ce que le dispositif de fermeture (7) est réalisé sous la forme d'une vis de fermeture, d'un couvercle de fermeture ou d'un volet.
  5. Récipient de compensation (20 ; 30) selon l'une des revendications 1 à 4, caractérisé en ce que le dispositif de fermeture (7) est conçu comme une soupape anti-retour, comme un soupape à ressort ou comme une soupape à commande pneumatique ou électrique.
  6. Récipient de compensation (20 ; 30) selon l'une des revendications précédentes, caractérisé en ce que l'ouverture d'entrée d'air (8) de l'au moins une chambre à air (6) est disposée de telle sorte que, lorsque le récipient de compensation (20 ; 30) est en fonctionnement, aucun fluide de refroidissement ne peut entrer dans l'au moins une chambre à air (6) lorsqu'elle est ouverte.
  7. Véhicule utilitaire ou navire, comprenant un récipient de compensation (20 ; 30) selon l'une des revendications précédentes.
EP15002877.7A 2014-12-10 2015-10-08 Reservoir compensateur pour les liquides de refroidissement de moteurs a combustion interne refroidis par liquide Active EP3032064B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014018366.1A DE102014018366A1 (de) 2014-12-10 2014-12-10 Ausgleichsbehälter für die Kühlflüssigkeit flüssigkeitsgekühlter Brennkraftmaschinen

Publications (2)

Publication Number Publication Date
EP3032064A1 EP3032064A1 (fr) 2016-06-15
EP3032064B1 true EP3032064B1 (fr) 2020-04-01

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EP15002877.7A Active EP3032064B1 (fr) 2014-12-10 2015-10-08 Reservoir compensateur pour les liquides de refroidissement de moteurs a combustion interne refroidis par liquide

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Country Link
US (1) US10823044B2 (fr)
EP (1) EP3032064B1 (fr)
CN (1) CN105697129B (fr)
BR (1) BR102015030414B1 (fr)
DE (1) DE102014018366A1 (fr)
RU (1) RU2704588C2 (fr)

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DE102017120056A1 (de) 2017-08-31 2019-02-28 Volkswagen Aktiengesellschaft Ausgleichsbehälter für ein Kühlsystem eines Fahrzeuges und Fahrzeug mit einem derartigen Ausgleichsbehälter
CN112654772B (zh) * 2018-09-11 2022-04-01 瓦锡兰芬兰有限公司 配备有多发动机集液箱装置的动力设备和船舶
GB2582543B (en) * 2019-03-12 2021-12-29 Jaguar Land Rover Ltd Degassing apparatus having multiple chambers
CN112438608B (zh) * 2019-08-29 2022-02-18 宁波方太厨具有限公司 一种蒸箱水位测量装置
JP7359794B2 (ja) * 2021-03-03 2023-10-11 トヨタ自動車株式会社 冷媒回路
DE102023108535B3 (de) 2023-04-04 2024-06-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Einfüllstutzen eines Wassertanks eines Kraftfahrzeugs

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Also Published As

Publication number Publication date
EP3032064A1 (fr) 2016-06-15
RU2704588C2 (ru) 2019-10-29
BR102015030414A8 (pt) 2021-08-31
BR102015030414A2 (pt) 2016-06-14
US10823044B2 (en) 2020-11-03
RU2015148667A3 (fr) 2019-04-15
US20160169084A1 (en) 2016-06-16
BR102015030414B1 (pt) 2023-04-25
CN105697129A (zh) 2016-06-22
DE102014018366A1 (de) 2016-06-16
RU2015148667A (ru) 2017-05-23
CN105697129B (zh) 2020-01-07

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