EP0437772B1 - Système de refroidissement à ébullition pour un moteur à combustion interne refroidi par liquide - Google Patents

Système de refroidissement à ébullition pour un moteur à combustion interne refroidi par liquide Download PDF

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Publication number
EP0437772B1
EP0437772B1 EP90124708A EP90124708A EP0437772B1 EP 0437772 B1 EP0437772 B1 EP 0437772B1 EP 90124708 A EP90124708 A EP 90124708A EP 90124708 A EP90124708 A EP 90124708A EP 0437772 B1 EP0437772 B1 EP 0437772B1
Authority
EP
European Patent Office
Prior art keywords
cooling system
evaporation cooling
coolant
compensating chamber
disposed
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
EP90124708A
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German (de)
English (en)
Other versions
EP0437772A1 (fr
Inventor
Peter Dr. Steinberg
Peter Kinninger
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
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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 EP0437772A1 publication Critical patent/EP0437772A1/fr
Application granted granted Critical
Publication of EP0437772B1 publication Critical patent/EP0437772B1/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
    • 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
    • F01P3/2271—Closed cycles with separator and liquid return
    • 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
    • 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
    • F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
    • 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
    • F01P11/0285—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
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/0204—Filling
    • F01P11/0209—Closure caps
    • F01P2011/0271—Semi-permeable, e.g. using Gore-Tex c fibres
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • 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 device of the type specified in the preamble of the first claim.
  • An evaporative cooling system of the generic type is known from Motortechnische Zeitschrift (MTZ) No. 50 (1989), No. 9, page 428.
  • This cooling system has the advantage that an increased operating temperature can be achieved at partial load, but that the same efficiencies as a conventional cooling system can be achieved at high loads.
  • An evaporative cooling system is known from DE 37 12 122 A, in which the internal combustion engine itself is only partially filled with coolant in the cold state. In addition, a reservoir is filled with an amount of coolant that is sufficient to substantially fill the condenser.
  • a temperature-controlled valve at the outlet of the reservoir is known for displacing the air from the rooms which are not filled with coolant when cold.
  • the object of the present invention is to develop a generic evaporative cooling system in such a way that the additional installation space for an expansion tank can be dispensed with.
  • this object is achieved by the characterizing features of the first claim.
  • the solution is based on the basic idea that the cooling system is connected to the atmosphere as a function of temperature, but this ensures that no coolant vapor can escape, which would lead to a loss of coolant in the long run. This allows the cooling system to be connected to the atmosphere via the temperature-dependent valve until all air is displaced. When the hot cooling system cools down and thus falls below a minimum temperature, the cooling system can be reconnected to the atmosphere. This prevents negative pressure from developing in the cooling system.
  • the temperature-controlled valve can be constructed as a thermostatic valve in the form of a bimetal, but other known configurations are also conceivable.
  • Claim 11 describes a level indicator that is useful for this purpose.
  • Fig. 1 the schematic of the evaporative cooling according to the invention is shown schematically.
  • the cylinder 1 and the cylinder head 2 of an engine 3, which is not otherwise shown in detail, are provided with cooling channels 4 and 5 or cooling chambers.
  • a flow line 6 branches off.
  • a steam separator 7 is installed in this flow line 6.
  • the steam separator 7 is divided into a lower space 9 and an upper space 10 by means of an overflow line 8.
  • the flow line 6 runs from the upper space 10 to a heat exchanger 11 working as a condenser.
  • This heat exchanger 11 has a coolant collecting space 12 in its lower region.
  • An equalization chamber 13 has a condensate reservoir 14 in the lower region. This is connected via a line 15 to the cooling water collecting space 12. Furthermore, the overflow line 8 opens into the storage space 14.
  • the return line 16 leads from the storage space 14, with the interposition of a condensate pump 17 and a heating heat exchanger 18, back into the cylinder 1.
  • the heating heat exchanger 18 is used to heat a passenger compartment of a vehicle driven by the internal combustion engine 3.
  • the cooling capacity of the heat exchanger 11 can be increased by means of a fan 19, which sucks in cooling air and presses it through the heat exchanger 11.
  • the upper space 10 of the steam separator and the part 6 'of the flow line 6 and the heat exchanger 11 and the compensation space 13 are filled with air in the cold state of the internal combustion engine 3, and with coolant vapor in the hot state.
  • the compensation space 13 is shown in more detail in FIG. 2. It is essentially tubular and has a closure cover 20 at its upper end.
  • the coolant supply 21 In its lower area, it has a coolant supply 21 due to the connecting line 15.
  • the level of the coolant supply depends on the temperature. It is at level I when the coolant is cold and at level II when the coolant is warm.
  • the fill level indicator 22 serves to control the coolant level. It consists of a float 23 floating at the current coolant level, which is connected via a connecting rod 24 to a viewing plate 25 in the area of the cover 20.
  • a separating labyrinth is formed below the cover 20 in the compensation space 13.
  • This consists of sloping sheets 26 which are alternately attached to the wall of the compensation space 13. These sheets are - as Fig. 2c shows - provided at their highest points with compensating holes 27. Furthermore, they have an essentially centrally arranged bore 28 for the passage of the connecting rod 24.
  • the slanted plates 26 have the task of liquid coolant, which u. U. is entrained by the air flowing to the cover 20 to separate.
  • the compensating holes 27 cause here that no air cushion can hold under the sloping sheets. Therefore, these compensating holes 27 are provided at the highest point of the sheets.
  • the passage 29 at the lower free end of the sheets 26 ensures that the separated coolant can flow off unhindered and that it is not closed by capillary action of the venting cross sections.
  • the closure cover 20 is shown in more detail in FIG. 3. It consists essentially of a handle part 30 which is firmly connected to an insert 31.
  • a temperature-controlled vent valve 32 as well as a molecular sieve 33 and a cover plate 34 are arranged in the insert 31.
  • the vent valve 32 and the molecular sieve 33 form a structural unit which are arranged in the housing 35.
  • the vent valve 32 which operates in a temperature-dependent manner - for example via a bimetal - is arranged at the entrance of the housing 35.
  • the molecular sieve 33 is constructed like a cartridge and divides the housing 35 into a separating space 36 and a coolant-free space 37.
  • the space 37 communicates with the space enclosed by the handle part 30 and the insert 31 via vent holes 38 in the cover plate 34. From there, holes 39 lead to the atmosphere.
  • the cover plate 34 is supported by a spring 40 on the inside of the handle part 30. With the interposition of a seal 41, the cover plate 34 rests on the insert 31. The seal 41 is arranged so that the holes 39 always remain open. In this way, the cover plate 34 forms a spring-loaded pressure relief valve.
  • the function of the compensation space 13 constructed according to the invention is explained in more detail below.
  • the vent valve 32 is opened. This creates a flow connection to the atmosphere via the ventilation valve 32, the separating space 36, the molecular sieve 33, the space 37, the ventilation holes 38 and the holes 39. This is shown in FIG. 3a.
  • the water Due to the inclined plates 26 and the bores 27 and the distance 29, the water is separated and only the steam reaches the vent valve 32. From there, the coolant vapor flows to the atmosphere in the same way as before. However, the coolant liquid contained in the coolant vapor is retained by the molecular sieve.
  • the molecular sieve has the task of letting air escape and retaining water. The exchange of air via the sieve takes place with the help of the pressure difference between the atmosphere and the interior of the cooling system. The separated liquid coolant then runs back to the coolant storage space on the inclined plates.
  • the vent valve 32 closes. This prevents vaporous coolant from escaping during operation and the liquid level within the cooling system thus drops.
  • the ventilation valve 32 gradually cools down. At a temperature of approx. 80 ° C, for example, it opens again. This creates a connection between the cooling system and the atmosphere.
  • Cooling creates a lower vacuum in the cooling system. This leads to the fact that the molecular sieve 33 again allows air to flow into the separating space 13 and the previously steam-filled spaces. The air exchange is completed when the pressure between the atmosphere and the cooling system is equalized.
  • the entire cover 20 is removed. Now coolant can be poured in through the separation chamber and the inclined plates. The height of the coolant level is indicated by the viewing plate 25. Then the compensation space 13 is closed again with the cover 20. The cooling system is then ready for use.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Claims (11)

  1. Système de refroidissement à vaporisation, pour un moteur à combustion interne refroidi par un liquide, dont l'enveloppe est en permanence complètement remplie d'un agent de refroidissement liquide, avec un séparateur de vapeur disposé sur la canalisation d'entré allant au condenseur en un point haut ainsi qu'avec une pompe de condensation disposée dans la canalisation de retour allant du condenseur à l'enveloppe de refroidissement, ainsi qu'avec une canalisation de liaison disposée à partir du séparateur de vapeur parallèlement au condenseur et une chambre d'équilibrage raccordée à la chambre de vapeur du condenseur, système de refroidissement à vaporisation caractérisé en ce que :
    - la chambre d'équilibrage (13) est reliée à l'atmosphère par une soupape de purge d'air (32) commandée en fonction de la température, quand l'agent de refroidissement est froid et est séparée de l'atmosphère quand l'agent de refroidissement est à la température de fonctionnement, et en ce qu'un tamis moléculaire (33) est disposé dans le sens de l'écoulement derrière la soupape de purge d'air (32).
  2. Système de refroidissement à vaporisation selon la revendication 1, caractérisé en ce que la soupape de purge d'air (32) et le tamis moléculaire (33) sont rassemblés dans une unité de construction et sont fixés sur un couvercle (20) fermant la chambre d'équilibrage (13).
  3. Système de refroidissement à vaporisation selon la revendication 2, caractérisé en ce que l'unité de construction est disposée dans un carter (35), qui est fixé sur une plaque de couverture (34) comprimée par un ressort, qui est conçue comme une soupape de surpression.
  4. Système de refroidissement à vaporisation selon la revendication 3, caractérisé en ce que dans la plaque de couverture (34) sont incorporés des trous de purge d'air (38), qui se trouvent à l'intérieur du carter (35) et présentent une liaison d'écoulement (trous 39) à l'atmosphère.
  5. Système de refroidissement à vaporisation selon l'une des revendications précédentes, caractérisé en ce que le tamis moléculaire (33) est constitué comme une cartouche de forme cylindrique, dans le centre de laquelle il est prévu un ajutage pour la soupape (32) commandée en fonction de la température.
  6. Système de refroidissement à vaporisation selon l'une des revendications précédentes, caractérisé en ce qu'il est prévu un labyrinthe de séparation à étages, formé de tôles (26) situées obliquement, dans la chambre d'équilibrage (13).
  7. Système de refroidissement à vaporisation selon la revendication 6, caractérisé en ce que les tôles situées obliquement (26) présentent aux endroits les plus élevés des trous d'équilibrage (27).
  8. Système de refroidissement à vaporisation selon la revendication 6 ou la revendication 7, caractérisé en ce que les endroits les plus bas des pôles (26) présentent un écartement (29) par rapport à la paroi de la chambre d'équilibrage (13).
  9. Système de refroidissement à vaporisation, selon l'une des revendications 6 à 8, caractérisé en ce que la chambre d'équilibrage (13) consiste en un tuyau.
  10. Système de refroidissement à vaporisation selon l'une des revendications précédentes, caractérisé en ce que la chambre d'équilibrage (13) présente à sa base une chambre de réserve (14) d'agent de refroidissement dans laquelle est prévue une jauge de remplissage (22).
  11. Système de refroidissement à vaporisation selon la revendication 10, caractérisé en ce que la jauge de remplissage (22) consiste en un flotteur (23), qui est en liaison avec un voyant (25) disposé dans la zone du couvercle.
EP90124708A 1990-01-17 1990-12-19 Système de refroidissement à ébullition pour un moteur à combustion interne refroidi par liquide Expired - Lifetime EP0437772B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4001208 1990-01-17
DE4001208A DE4001208A1 (de) 1990-01-17 1990-01-17 Verdampfungskuehlsystem fuer eine fluessigkeitsgekuehlte brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0437772A1 EP0437772A1 (fr) 1991-07-24
EP0437772B1 true EP0437772B1 (fr) 1993-05-12

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EP90124708A Expired - Lifetime EP0437772B1 (fr) 1990-01-17 1990-12-19 Système de refroidissement à ébullition pour un moteur à combustion interne refroidi par liquide

Country Status (4)

Country Link
US (1) US5111777A (fr)
EP (1) EP0437772B1 (fr)
DE (2) DE4001208A1 (fr)
ES (1) ES2041111T3 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2684722A1 (fr) * 1991-12-06 1993-06-11 Valeo Thermique Moteur Sa Vase d'expansion pour circuit de refroidissement a changement d'etat.
DE4231845A1 (de) * 1992-09-23 1993-12-16 Bayerische Motoren Werke Ag Verdampfungskühlsystem für eine Brennkraftmaschine
DE4317788C2 (de) * 1993-05-28 1995-04-27 Bayerische Motoren Werke Ag Verdampfungskühlsystem für eine Brennkraftmaschine
DE4317787A1 (de) * 1993-05-28 1994-09-01 Bayerische Motoren Werke Ag Verdampfungskühlsystem für eine Brennkraftmaschine
DE4341927A1 (de) * 1993-12-09 1995-06-14 Bayerische Motoren Werke Ag Teilgeflutetes Verdampfungskühlsystem
DE4342295A1 (de) * 1993-12-11 1995-06-14 Bayerische Motoren Werke Ag Verdampfungskühlsystem für eine Brennkraftmaschine
DE4342292A1 (de) * 1993-12-11 1995-06-14 Bayerische Motoren Werke Ag Teilgeflutetes Verdampfungskühlsystem
DE4428208B4 (de) * 1994-08-09 2007-03-22 Bayerische Motoren Werke Ag Vorrichtung zum Erkennen von Flüssigkeitsmangel
FR2752016B1 (fr) * 1996-07-31 1998-09-11 Renault Dispositif de refroidissement d'un moteur a combustion interne
US7152555B2 (en) * 2001-02-20 2006-12-26 Volvo Trucks North America, Inc. Engine cooling system
US6532910B2 (en) 2001-02-20 2003-03-18 Volvo Trucks North America, Inc. Engine cooling system
US20070028769A1 (en) * 2005-08-05 2007-02-08 Eplee Dustin M Method and apparatus for producing potable water from air including severely arid and hot climates
CN105709869B (zh) * 2014-12-03 2017-11-03 中国航空工业集团公司航空动力控制系统研究所 一种低温煤油供给装置
CN106837597B (zh) * 2017-03-03 2018-08-17 杨永顺 模块式液体活塞发动机及锅炉

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US2292946A (en) * 1941-01-18 1942-08-11 Karig Horace Edmund Vapor cooling system
US2480986A (en) * 1947-05-29 1949-09-06 Gen Motors Corp Thermostatic radiator valve
US2926641A (en) * 1958-01-20 1960-03-01 Tacchella Inc Uniform temperature, dual circuit engine cooling system
FR1245326A (fr) * 1960-01-15 1960-11-04 Perfectionnements aux bouchons de radiateurs à circulation d'eau sous pression
FR2408722A1 (fr) * 1977-11-10 1979-06-08 Berliet Automobiles Circuit de refroidissement perfectionne pour un moteur a combustion interne
US4367699A (en) * 1981-01-27 1983-01-11 Evc Associates Limited Partnership Boiling liquid engine cooling system
JPS6067717A (ja) * 1983-09-22 1985-04-18 Nissan Motor Co Ltd 沸騰冷却システムの簡易空気排出式クロ−ズド装置
EP0143326B1 (fr) * 1983-10-25 1990-10-03 Nissan Motor Co., Ltd. Système de refroidissement pour un moteur de véhicule
JPS61275522A (ja) * 1985-05-30 1986-12-05 Nissan Motor Co Ltd エンジンの沸騰冷却装置
JPS6291616A (ja) * 1985-10-15 1987-04-27 Nissan Motor Co Ltd 内燃機関の沸騰冷却装置
JPH073172B2 (ja) * 1986-04-11 1995-01-18 日産自動車株式会社 内燃機関の沸騰冷却装置
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

Also Published As

Publication number Publication date
EP0437772A1 (fr) 1991-07-24
ES2041111T3 (es) 1993-11-01
DE4001208A1 (de) 1991-07-18
DE59001445D1 (de) 1993-06-17
US5111777A (en) 1992-05-12

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