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EP0768452B1 - Guidage de fluide de refroidissement dans un circuit de refroidissement d'un moteur à combustion interne refroidi par liquide - Google Patents

Guidage de fluide de refroidissement dans un circuit de refroidissement d'un moteur à combustion interne refroidi par liquide Download PDF

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Publication number
EP0768452B1
EP0768452B1 EP96114806A EP96114806A EP0768452B1 EP 0768452 B1 EP0768452 B1 EP 0768452B1 EP 96114806 A EP96114806 A EP 96114806A EP 96114806 A EP96114806 A EP 96114806A EP 0768452 B1 EP0768452 B1 EP 0768452B1
Authority
EP
European Patent Office
Prior art keywords
coolant
radiator
tank
venting
circulation system
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
EP96114806A
Other languages
German (de)
English (en)
Other versions
EP0768452A1 (fr
Inventor
Hans-Dieter Gohl
Hans-Martin Haase
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.)
Mercedes Benz Group AG
Original Assignee
Daimler 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 filed Critical Daimler Benz AG
Publication of EP0768452A1 publication Critical patent/EP0768452A1/fr
Application granted granted Critical
Publication of EP0768452B1 publication Critical patent/EP0768452B1/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
    • F01P11/02—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0231—Header boxes having an expansion chamber
    • 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
    • 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
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/08—Cabin heater

Definitions

  • the invention relates to a coolant guide in one Cooling circuit of a liquid-cooled internal combustion engine according to the preamble of claim 1.
  • Coolant guide generic type In a cooling circuit of a liquid-cooled Internal combustion engine is a coolant cooler with a geodetically arranged water box and inlet side and arranged outlet side for the coolant. Above the coolant cooler is in flow with it connected expansion tank. The inlet side of the coolant cooler is with an outlet connection for heated by the engine Coolant and the outlet side with a coolant pump connected. There is also a vehicle heater in the cooling circuit arranged with a flow line and a return line, the supply line of coolant heated by the engine is fed.
  • a disadvantage of coolant guides of the generic type lies in their relatively high construction costs caused by the large number of different coolant and ventilation lines between engine, radiator and other heat exchangers (e.g. vehicle heating, oil cooler and auxiliary cooler) is conditional. Furthermore, the construction is relatively complex Arrangement of the coolant and ventilation lines often one Consequence of the demands on the cooling circuit with regard to cooling individual components and requirements with regard to ventilation the cooling circuit, especially during vehicle operation, with important secondary aspects such as filling and emptying the cooling circuit with coolant is taken into account and must be satisfactorily achievable.
  • the invention has for its object a generic Form coolant management in such a way that with consistently good Coolant management properties with regard to cooling, Venting, filling and draining a significant reduction the construction effort and the most compact possible Cooling system is accessible.
  • An advantage of the arrangement according to the invention is that by venting the cooling water in the engine block via the flow line of the vehicle heating in the expansion tank or in the water tank of the coolant cooler no separate Breather line required for continuous engine ventilation is. By eliminating the separate ventilation line is a reduction in construction costs and a more compact design reached for the cooling water circuit.
  • the embodiment according to the invention according to claim 2 serves the spatial arrangement of the individual components of the coolant circuit also the compact design of the coolant guide, because bypassing the expansion tank with the flow line, of the water tank or the cooling system becomes.
  • a particularly compact embodiment of the invention results according to Claim 7, since the expansion tank with the water tank the coolant cooler is integrated and a direct flow connection from the expansion tank to the upper water tank when installed is available.
  • the integration of the expansion tank with the coolant cooler for example, via a Plug connection, so that the expansion tank, on the upper Overlying water box, into an integrated unit with the Coolant cooler is connected.
  • the coolant cooler is vented according to claim 8 via a nozzle-shaped junction in the bottom of the expansion tank, those in fluid communication with the upper water tank stands.
  • An advantage of the embodiment according to the invention according to claim 9 is that the return line from the vehicle heater simple way in the expansion tank or in the area of upper water box is feasible, making an easy connection possible with the cooling water pipe leading to the engine block is.
  • the return line of the vehicle heater connectable to the cooling water pipe leading to the water pump, causing a harmful flow of cooling water from the Avoided return of the vehicle heating to the coolant cooler becomes.
  • FIG. 1 and 2 show a basic illustration of an inventive Coolant flow in a cooling circuit of a liquid-cooled Internal combustion engine with an engine block 1, one Fan wheel la and a coolant cooler arranged in front of it 2.
  • This includes an upper geodetically in the installed position Water box 3 and a lower deflection box 4, the water box 3 fluidly connected to a surge tank 5 is.
  • the flow direction of the coolant through the connection lines between engine block 1, coolant cooler 2 and expansion tank 5 and vehicle heating 6 is for filling and Heating operation indicated by arrows.
  • the exchange of coolant between the engine block 1 and the remaining cooling circuit takes place via a coolant regulator 27, the thermostats for motor temperature control, which are known in principle includes.
  • the thermostats for motor temperature control which are known in principle includes.
  • the following always from the entry or exit of cooling water in or spoken from the engine block and the coolant regulator 27 is not always mentioned.
  • the coolant cooler 2 has one in the water tank 3 arranged inlet side 9 and an outlet side 10 for the coolant (Cooling water).
  • the inlet side 9 is with a line 9a with an outlet 11 of the coolant regulator 27 for from Engine heated coolant and the outlet side 10 with a line 12 with an inlet nozzle 13 arranged in the cooling circuit
  • Coolant pump 14 connected by the coolant cooler 2 cooled coolant in the cooling channels of the engine block 1 promotes.
  • the flow line 7 of the vehicle heater 6 is through the expansion tank 5 performed and is with a further outlet nozzle of the coolant regulator 27 connected.
  • a valve 16 in the flow line 7 arranged that with a controller, not shown, for regulation a cabin interior temperature is connected.
  • the coolant cooler 2 and the engine block 1 have one below coolant ventilation described in more detail.
  • the engine block 1 is vented both during filling as well as in continuous operation of the cooling circuit via an in of the flow line 7 arranged vent 15 (see 3 and 4), which opens into the expansion tank 5.
  • the mouth of the vent opening 15 can also be in the Upper water box 3 of the coolant tank 2 may be arranged.
  • Vent the engine block 1 can instead of those described above simple ventilation opening 15 also a ventilation device, such as one shown in FIG. 5 and radial breather described in more detail below (Ventilation cyclone).
  • a ventilation device such as one shown in FIG. 5 and radial breather described in more detail below (Ventilation cyclone).
  • the with the inlet connector 13 of the water pump 14 and the outlet side 10 of the coolant cooler 2 forms connected line 12 at the same time a fill line 23 for the cooling water. So is the fill line 23 into the connecting line 12 between the radiator outlet and functionally integrated engine inlet.
  • the fill line 23 in the connecting line 12 from the engine block 1 to Coolant cooler 2 integrated which means the separate filling line between coolant tank 5 and suction side of the water pump 14 without replacement.
  • the upper water tank 3 of the coolant cooler 2 is through a partition T in running approximately along a cooler width B two chambers 17, 18 divided (see Fig. 3 and 4), the inlet side 9 in one chamber 17 and the outlet side 10 in the other chamber 18 opens.
  • the partition T and the location of the Inlet and outlet side 9, 10 and through the lower deflection box 4 the coolant cooler 2 flows through in a U-shaped manner this is indicated by the solid arrows in Fig. 3.
  • the two chambers 17, 18 are through a vent opening 19 (see FIGS. 3 and 4), for example a defined annular gap, connected to ensure the radiator ventilation to a geodetic level compensation of the coolant in the chambers 17.18 and, if necessary, a targeted, speed-dependent Short circuit flow from chamber 17 to chamber 18 To represent (pressure drop reduction).
  • a vent opening 19 for example a defined annular gap
  • a drain screw 26 is arranged on the lower deflection box 4, for the combined draining of coolant from the coolant cooler as well as draining coolant from the engine can be used.
  • An engine drain line 28 that from the cooling water inlet into the engine (or housing of a coolant regulator 27) leads to said drain plug 26 is indicated by dashed lines.
  • the return line 8 of the vehicle heater 6 is in the expansion tank 5 led. To a harmful flow of cooling water from the vehicle heating return to the coolant cooler 2 to avoid, is in the expansion tank 5 Return pipe of the return line 8 in the nozzle of the Water pump leading line 12, whereby the of the Vehicle heating 6 returning cooling water directly to that of the Water pump 14 flowing, cooled coolant stream added becomes.
  • FIGS. 3 and 4 show a schematic diagram of the coolant cooler 2 with upper water box 3 and deflection box 4 together with the water tank 3 integrated expansion tank 5. Same Components from FIGS. 1 and 2 have the same reference numerals designated.
  • the coolant cooler 2 is known in principle from a plurality of pipes 29 standing vertically in the installed position, the upper water tank 3 with the lower deflection box 4 connect in terms of flow. To enlarge the cooling surface cooling fins 30 are arranged between the tubes, wherein in Fig. 3 only some of the tubes 29 drawn together with cooling fins 30 are.
  • the expansion tank 5 includes in addition to those described above Components a float 31 and guide 32, the Float with a signal device, not shown Display of the coolant level (coolant quantity) is connected.
  • the expansion tank 5 includes a filler neck 24 and a nozzle 33 for a single or multi-stage pressure relief valve 25 (see Fig. 1) and openings 34 and 35 for the Implementation of the flow line 7 and an opening 36 for the Return line 8 of the vehicle heating system 6.
  • the expansion tank 5 is over with the upper water tank 3 of the coolant cooler 2 integrated a spray connection. A possible education this connection is shown in Fig. 5.
  • the cooling circuit is filled via the filling opening 24 of the expansion tank 5.
  • the coolant fill quantity is limited and in the expansion tank 5 for continuous operation of the Cooling circuit necessary compensation air volume ensured (Coolant was K).
  • the coolant is not from the expansion tank 5 Connection channel shown in the chamber 18 of the water tank 3 directed and filled the coolant cooler 2 U-shaped (dashed arrows) up to the nozzle level on the inlet side 9 and the outlet side 10. Then the cooling channels of the Engine blocks 1 by overflowing at the two nozzles on the inlet side 9 and the outlet side 10 via the lines 9a and 12 (see Fig. 1 and 2) filled.
  • the connecting channel between Cooling water cooler 2 and expansion tank 5 is a plug-in or hose connection is formed and can at the same time partially can be used to attach the expansion tank.
  • the venting of the coolant flow into the expansion tank 5 takes place with simultaneous entrainment of gas inclusions one vertically arranged and matched to the ventilation quantity Channel 21 in the bottom 22 of the expansion tank 5, wherein the channel 21 is fluidly connected to the water tank 3 is.
  • the coolant cooler 2 is vented by a nozzle-shaped one Junction 20 together with channel 21 in the bottom 22 of the expansion tank 5.
  • the channel 21 is with the upper water tank 3 in flow connection.
  • the nozzle-shaped Mouth 20 vertically in addition to the installation direction arranged channel 21 is on the venting amount of the coolant cooler 2 matched. Furthermore, the venting of the Coolant cooler 2 and the cooling channels of the engine block 1 at the Filling and also in continuous operation via the in the partition T arranged vent hole 19 as well as via the vent opening 15 in the supply line 7.
  • the heating return via the return line 8 takes place according to the invention via the expansion tank 5, the return line 8 directly into the nozzle 10 leading to the water pump 14 Line 12 and 23 is introduced. To be as low as possible To achieve energy loss in the coolant return flow, the heating return line 8 is as direct as possible and with little Flow deflections in the nozzle 10 out (see Fig. 2nd and 4).
  • FIG. 5 shows, as already mentioned above, an embodiment of a Expansion tank 5 'with integrated venting device, which is designed as a radial breather (ventilation cyclone).
  • the Breather device is particularly suitable for permanent engine ventilation.
  • Components that have already been described in FIGS. 1 to 4 and are only modified constructively, are apostrophized Reference numerals denote such as the inlet side 9 'and the openings 34' and 35 'for the passage of the flow line 7 '.
  • the expansion tank 5 ' consists of an upper part 5a and a lower part 5b, both of which are sealingly connected to one another are.
  • the cooling circuit is ready for operation the cooling water level in the upper part 5a of the expansion tank 5 'approximately at the level indicated in FIG. 5.
  • the Expansion tank 5 ' is with the upper water tank 3 of the Coolant cooler 2 (see Fig. 1) via an injection molding Connection 43 integrated.
  • the radial breather is arranged in the expansion tank 5 ' and comprises a two-part cylindrical housing with a lower housing part 38 and an upper housing part 37.
  • the lower Housing part 38 is injection molded in the lower part 5b of the expansion tank 5 'molded and the upper housing part 37 is plugged onto the lower housing part 38 in a sealing manner.
  • the upper housing part 37 comprises a two-part housing upward closing cylinder ceiling 41, in which there is approximately there is an opening 42 in the center which connects between the interior of the housing and the interior of the expansion tank 5 'produces.
  • the lower housing part 38 comprises an in approximately tangential mouth 39 and one geodetically below this arranged, approximately diametrically opposite tangential Mouth 40 of the flow line 7 '.
  • the housing can thus as Part of the flow line 7 'can be seen.
  • the coolant KS flows through the flow line 7 ', similar to Flow line 7 according to FIG. 1, from the engine 1 in the direction of the vehicle heating 6, the flow direction of the coolant KS with Arrows is indicated.
  • the ventilation of the coolant flow KS through the radial breather works like this.
  • the coolant KS flows over the Mouth 39 tangentially into the cylindrical housing and, roughly diametrically opposite and geodetically below the confluence 39, through the tangential mouth 40 from the cylindrical Housing. Due to the tangential inflow and outflow and by the cylindrical contour of the housing (at least between the mouth 39 and the mouth 40) receives the coolant flow KS a swirl so that when flowing through the radial breather the coolant flows through the centrifugal force in the direction Housing shell is pressed. This will make the light gas components (Gas bubbles 44) displaced into the center of the housing and subsequently enter through vent 42 the cylinder ceiling 41.
  • the area of the housing between the tangential input and Outflow opening 39, 40 is approximately cylindrical, so that reliably develop the swirl described above in the flow can.
  • the flow line for Vehicle heating passed through the expansion tank, it can but also run through the upper water tank.
  • the return line 8 also be guided in the upper water tank 3 and similarly the line 12 from the water box 3 to the engine block 1 to lead.
  • the chambers 17 and 18 of the upper water box 3 by a pressure dynamic connection element to create a defined flow short circuit connected, said connecting element when changing Pressure potential in the chambers 17, 18 changes its degree of opening in such a way that with a large pressure difference the degree of opening is greater than with a small pressure difference.

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

Claims (10)

  1. Guidage de fluide de refroidissement dans un circuit de refroidissement d'un moteur à combustion interne refroidi par liquide, dans lequel sont disposés un radiateur (2) possédant au moins une boíte à eau (3) ainsi qu'un côté admission (9) pour du fluide de refroidissement échauffé par le moteur et un côté sortie (10) pour du fluide de refroidissement refroidi, un récipient compensateur (5, 5') relié, pour l'écoulement du fluide, au radiateur, de même qu'un chauffage (6) du véhicule, pourvu d'une conduite d'arrivée (7, 7') et d'une conduite de retour (8), le radiateur et le bloc-moteur présentant une purge d'air du fluide de refroidissement,
    caractérisé en ce que la purge d'air de l'eau de refroidissement se trouvant dans le bloc-moteur (1), s'effectue à travers la conduite d'arrivée (7, 7') pour le chauffage (6) du véhicule, un orifice de purge d'air (15, 42), ménagé dans la conduite d'arrivée (7, 7'), débouchant dans le récipient compensateur (5) ou dans la boíte à eau (3) du radiateur (2).
  2. Guidage de fluide de refroidissement selon la revendication 1, caractérisé en ce que la conduite d'arrivée (7, 7') pour le chauffage (6) est passée à travers le récipient compensateur (5, 5') et/ou à travers la boíte à eau (3).
  3. Guidage de fluide de refroidissement selon la revendication 1, caractérisé en ce que le côté admission (9) et le côté sortie (10) du radiateur (2) sont disposés dans la zone de la boíte à eau (3) située en haut dans la position montée.
  4. Guidage de fluide de refroidissement selon la revendication 1 ou 3, caractérisé en ce que
    la boíte à eau (3) du radiateur (2), située en haut dans la position montée, est partagée par une cloison (T), s'étendant dans le sens de la largeur (B) du radiateur, en deux chambres (17, 18), le côté admission (9) débouchant dans une chambre (17) et le côté sortie (10) débouchant dans l'autre chambre (18),
    une boíte à eau inférieure (4)'du radiateur (2) sert à la déviation du fluide de refroidissement,
    de sorte que le radiateur (2) est parcouru par le fluide de refroidissement suivant un trajet essentiellement en U.
  5. Guidage de fluide de refroidissement selon la revendication 4, caractérisé en ce que les chambres (17, 18) de la boíte à eau supérieure (3) sont reliées entre elles par un élément de liaison dynamique sensible à la pression et servant à l'établissement d'un "court-circuit" défini dans l'écoulement, ledit élément de liaison changeant son degré d'ouverture sous l'effet de la variation de la différence de pression dans les chambres (17, 18) et disposant d'un fente définie en vue de la purge d'air pour l'opération de remplissage.
  6. Guidage de fluide de refroidissement selon la revendication 1, caractérisé en ce que la purge d'air de la conduite d'arrivée (7, 7') s'effectue par un dispositif de purge d'air, formé en particulier par un purgeur d'air radial, qui est intégré au récipient compensateur (5, 5') et à la conduite d'arrivée 7, 7).
  7. Guidage de fluide de refroidissement selon la revendication 1, caractérisé en ce que le récipient compensateur (5) est intégré à la boíte à eau (3) du radiateur (2), et la purge d'air du radiateur s'effectue à travers le récipient compensateur (5).
  8. Guidage de fluide de refroidissement selon la revendication 7, caractérisé en ce que le système de purge d'air du radiateur (2) comprend une embouchure (20) en forme de buse dans le fond (22) du récipient compensateur (5), embouchure qui est en liaison, pour l'écoulement du fluide, avec la boíte à eau supérieure (3) et à laquelle se raccorde vers le haut, dans la position montée, un canal (21) orienté verticalement et accordé à la quantité d'air à évacuer.
  9. Guidage de fluide de refroidissement selon la revendication 1, caractérisé en ce que la conduite de retour (8) du chauffage (6) mène dans la zone de la boíte à eau (3) géodésiquement supérieure ou dans le récipient compensateur (5), et que la quantité de fluide de retour est ajoutée à un courant de fluide de refroidissement refroidi se dirigeant vers une pompe à eau (14).
  10. Guidage de fluide de refroidissement selon une des revendications 1 à 9, caractérisé en ce que la conduite (12) entre le côté sortie (19) du radiateur (2) et l'entrée du fluide de refroidissement côté moteur (tubulure d'entrée 13) forme en même temps une conduite de remplissage (23) pour le fluide de refroidissement.
EP96114806A 1995-10-13 1996-09-16 Guidage de fluide de refroidissement dans un circuit de refroidissement d'un moteur à combustion interne refroidi par liquide Expired - Lifetime EP0768452B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19538239A DE19538239C1 (de) 1995-10-13 1995-10-13 Kühlmittelführung in einem Kühlkreislauf einer flüssigkeitsgekühlten Brennkraftmaschine
DE19538239 1995-10-13

Publications (2)

Publication Number Publication Date
EP0768452A1 EP0768452A1 (fr) 1997-04-16
EP0768452B1 true EP0768452B1 (fr) 1999-03-03

Family

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Application Number Title Priority Date Filing Date
EP96114806A Expired - Lifetime EP0768452B1 (fr) 1995-10-13 1996-09-16 Guidage de fluide de refroidissement dans un circuit de refroidissement d'un moteur à combustion interne refroidi par liquide

Country Status (3)

Country Link
US (1) US5666911A (fr)
EP (1) EP0768452B1 (fr)
DE (2) DE19538239C1 (fr)

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CN112096503B (zh) * 2020-09-21 2021-06-25 安徽金力泵业科技有限公司 一种新型发动机冷却水泵
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US5666911A (en) 1997-09-16
DE19538239C1 (de) 1997-04-24
DE59601374D1 (de) 1999-04-08
EP0768452A1 (fr) 1997-04-16

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