EP1774148B1 - Appareil de refroidissement de fluide refrigerant comprenant un appareil de refroidissement d'huile a engrenages qui est integre dans une des caisses a eau - Google Patents

Appareil de refroidissement de fluide refrigerant comprenant un appareil de refroidissement d'huile a engrenages qui est integre dans une des caisses a eau Download PDF

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Publication number
EP1774148B1
EP1774148B1 EP05771897A EP05771897A EP1774148B1 EP 1774148 B1 EP1774148 B1 EP 1774148B1 EP 05771897 A EP05771897 A EP 05771897A EP 05771897 A EP05771897 A EP 05771897A EP 1774148 B1 EP1774148 B1 EP 1774148B1
Authority
EP
European Patent Office
Prior art keywords
coolant
thermostat
transmission oil
outlet
engine
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.)
Not-in-force
Application number
EP05771897A
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German (de)
English (en)
Other versions
EP1774148A1 (fr
Inventor
Eberhard Pantow
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.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
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 Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP1774148A1 publication Critical patent/EP1774148A1/fr
Application granted granted Critical
Publication of EP1774148B1 publication Critical patent/EP1774148B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F28F9/0234—Header boxes; End plates having a second heat exchanger disposed there within, e.g. oil cooler
    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using 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
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/04—Lubricant cooler
    • F01P2060/045—Lubricant cooler for transmissions
    • 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
    • F01P2070/00—Details
    • F01P2070/04—Details using electrical heating elements

Definitions

  • the invention relates to a coolant radiator with integrated in one of the water tanks transmission oil cooler for cooling transmission oil according to the preamble of claim 1.
  • Fig. 6 1 shows a coolant circuit 201 for cooling a coolant flowing through the engine 203 and a transmission oil circuit 202 for cooling a gear oil 204 flowing through a gear 204 according to the prior art.
  • the transmission oil is cooled due to the increased heat input by the colder coolant in arranged in a water tank 206 of the coolant radiator 207 transmission oil cooler 205, wherein the cooling capacity of the transmission oil cooler 205 is coupled to the flow of the coolant radiator 207.
  • the flow directions of coolant and transmission oil are indicated by arrows.
  • an engine thermostat 211 is arranged on the coolant outlet side of the engine 203 and allows the coolant to pass directly through a bypass 213 to the pump 212 and back into the engine 203 when the engine is cold 203, ie no coolant flows in the coolant radiator 207 ,
  • the transmission oil in normal operation, the transmission oil reaches transmission oil temperatures that are below the maximum value for continuous operation.
  • the coolant radiator is usually not flowed through, so that a cooling of the transmission is prevented.
  • the coolant flow rates through the coolant cooler are so low that only a small cooling capacity for the transmission oil cooler in the water box is available, so that again excessive cooling of the transmission is prevented.
  • the patent DE761433 discloses a coolant circuit which is similar to the coolant circuit of FIG. 6 is.
  • the coolant radiator should be as inexpensive as possible.
  • the invention relates to a coolant radiator with a transmission oil cooler integrated in one of the water boxes of the coolant radiator, wherein a second coolant inlet and / or a second coolant outlet is provided on the water tank, which coolant circulation also at closed engine thermostat, especially when the engine is cold but allows too hot transmission oil.
  • the transmission oil circuit here preferably corresponds completely to a conventional transmission oil circuit, so that no changes are required in this area and the old components can continue to be used.
  • Only at the water box is a second coolant inlet and / or a second coolant outlet to be provided, wherein the control preferably takes place via a thermostat, which can be integrated into the water box or integrated in the coolant inlet and outlet.
  • a bypass line to the second coolant inlet or outlet and a further branch in the conventional coolant circuit no changes are required, wherein the branch can also be integrated directly into the engine thermostat.
  • the second coolant inlet and / or the second coolant outlet is preferably arranged in the outlet water box, in which the coolant temperature is below that of the coolant flowing into the inlet water box, from the engine, so that due to the lower temperature more effective Transmission oil cooling is possible.
  • the inlet or outlet is preferably above the transmission oil cooler, since in this upper region, the coolant temperature at not flowed through the coolant radiator, which is the case especially when the engine is cold, is higher than in the lower region of the water box, since the warm coolant rises.
  • the thermostat has a Dehnscherlement which projects into the water tank.
  • the expansion element which expands at high temperatures and according to the arrangement thereof opens a valve, the inlet or outlet can be controlled inexpensively and easily.
  • a flow divider is arranged in the water box, which separates a sensor region of the thermostat, that is, for example, the region in which an expansion element is arranged, in a region substantially free of coolant flow from the inflow region of the second coolant inlet.
  • a regulation of the flow through the water box, in which the transmission oil cooler is arranged, as a function of the coolant temperature ensures that the transmission oil is sufficiently cooled and prevents overheating of the transmission oil, which is done without a corresponding regulation, especially in not yet warm engine and warm gear oil could.
  • the entire arrangement is only slightly more expensive than a conventional arrangement with coolant circuit and transmission oil circuit.
  • a valve closing off the second coolant inlet and / or the second coolant outlet, in particular the thermostat is actuated externally, for example via electronics, particularly preferably by heating.
  • This makes it possible to actively heat the transmission oil to bring it to operating temperature faster at low loads and thus reduce friction losses. Opening the valve at a coolant temperature slightly below the temperature at which the engine thermostat opens is particularly advantageous. This allows the transmission oil to be heated before the coolant radiator releases heat to the environment.
  • Fig. 1 shows a coolant circuit 1 and a transmission oil circuit 2 of a connected to a motor 3 transmission 4 continuously variable transmission according to the first embodiment.
  • a transmission oil cooler 5 is arranged in a water tank 6, in this case the outlet water box 6 ', a coolant cooler 7.
  • the transmission oil circuit 2 corresponds to the transmission oil circuit 102 according to the prior art described above, so that will not be discussed further here.
  • coolant flows in normal operation - according to conventional coolant circuits - via a line 8 to the coolant cooler 7, which it leaves the coolant outlet nozzle 9, a line 10 to a motor-thermostat 11 and a coolant pump 12 again to the engine 3.
  • the motor-thermostat 11 blocks the line 10 and the coolant passes through a bypass 13 from the motor 3 directly to the motor-thermostat 11 and the pump arranged thereafter 12.
  • the coolant circuit 1 corresponds to a conventional coolant circuit.
  • a second coolant outlet 20 is provided, which is controlled by a second thermostat 21 is, and from which via a bypass line 22, the coolant can be fed directly to the bypass 13.
  • the thermostat 21 determines the temperature of the coolant, which is convectively heated in the water tank 6 by the transmission oil cooler 5 flowing through, hot transmission oil.
  • the thermostat 21 is mounted directly on the water box 6, but it can also be integrated into a second coolant outlet nozzle. Since the warm coolant in the water box 6 rises upward, the second thermostat 21 is mounted above, above the transmission oil cooler 5.
  • a sufficient pressure gradient is required.
  • the heated coolant passes through the bypass 13 on the engine thermostat 11, so that even when the engine thermostat 11 is closed, there is a sufficient pressure drop and thus a flow is possible.
  • bypass line 22 leads to an additional mares directly into the housing of the engine thermostat, wherein the mares is arranged so that it opens behind the actual valve in the engine return.
  • a thermostat with expansion element 23 is used in the present case, wherein the expansion element 23 protrudes into the water tank 6.
  • the thermostatic valve 24 By heating the expansion element 23 gives the thermostatic valve 24, of which in Fig. 3 the valve seat 25 and the valve plate 26 are indicated, the flow path through the second outlet nozzle 27 via the bypass line 22 free.
  • the convection is in Fig. 3 indicated by an unfilled arrow above the transmission oil cooler 5.
  • a coolant circuit 101 and a transmission oil circuit 102 are provided, in which case the transmission oil circuit 102 corresponds to the transmission oil circuit 2 and the transmission oil circuit 202 according to the previously described embodiment and the prior art, so that not will be discussed in more detail.
  • the motor thermostat 111 is arranged on the engine outlet side in the coolant circuit 101.
  • the coolant coming from the engine 103 flows through the engine thermostat 111, a line 108 to the coolant cooler 107, which it leaves at a coolant outlet nozzle 109, and a line 110 to a coolant pump 112 and back to the engine 103.
  • the motor thermostat 111 blocks the line 108 and the coolant passes through a bypass 113 from the motor 103 directly to the line 110 and the pump 112. In so far corresponds to the coolant Cycle 1 again a conventional coolant circuit, in this case the in Fig. 6 illustrated refrigerant circuit 201 according to the prior art.
  • a second coolant inlet 130th provided, which is controlled by a second thermostat 131.
  • coolant via a bypass line 132 from the engine thermostat 111 to the second thermostat 131 and enter the water tank 106. From the water box 106 from the coolant, after it has absorbed heat from the transmission oil cooler 105, via the coolant outlet nozzle 109 in the usual way via the line 110 to the pump 112 and back into the engine 103.
  • bypass line 132 is so in the Housing the motor thermostat 111 integrates that it is closed when the engine thermostat 111 is open, so that no coolant passes through the bypass line 132 in the water tank 106, but the entire coolant takes the normal flow path via the line 108 to the coolant radiator 107 and enters the same via the inlet water box 106 ".
  • the thermostat 131 determined according to the thermostat 21 of the first embodiment, the temperature of the coolant, which is convectively heated in the water tank 106 by the transmission oil cooler 105 flowing through hot transmission oil.
  • the thermostat 131 is mounted directly in the water box 106 (see. Fig. 5 ), but it may also be integrated in a second coolant inlet nozzle.
  • the second thermostat 131 corresponding to the thermostat 21 of the first embodiment is mounted above the transmission oil cooler 105, but in the present case, the configuration of the thermostat 131 differs from that of the thermostat 21.
  • the expansion element of the thermostat 131 is in this case on a valve with valve seat and valve disc opposite wall of the water box 106 arranged with a flow divider in the form of a partition wall is arranged therebetween, so that when not warm engine 103, no cool coolant in contact with the expansion element and thus closes the thermostat again, although a flow is desired.
  • the second thermostat 131 in turn has an expansion element 133 and a thermostatic valve 134 with a valve seat 135 and valve disc 136, which are arranged on a second inlet stub 137 on.
  • the expansion element 133 disposed on one side of the water box 106 above the transmission oil cooler 105 and forming a sensor portion of the thermostat 131
  • the thermostat valve 134 disposed on the opposite side of the water box 106 above the transmission oil cooler 105 through a flow divider 138 is separated, which is formed by a projecting towards the transmission oil cooler 105 wall, which prevents that when the thermostat valve 134 is formed in the region of the expansion element 133, a same cooling flow instead of the flow as a result of the heat convection, so that an unwanted closing of the second thermostat 131 is prevented.

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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)
  • General Details Of Gearings (AREA)

Claims (12)

  1. Radiateur à liquide de refroidissement comprenant un échangeur de chaleur auxiliaire, en particulier un refroidisseur d'huile de boîte de vitesses (5; 105), intégré dans l'un des bacs collecteurs ou dans l'une des boîtes à eau (6; 106) du radiateur à liquide de refroidissement (7; 107), caractérisé en ce qu'il est prévu, sur le bac collecteur ou sur la boite à eau (6; 106), une deuxième entrée de liquide de refroidissement (130) et/ou une deuxième sortie de liquide de refroidissement (20), où la deuxième entrée de liquide de refroidissement (130) et/ou la deuxième sortie de liquide de refroidissement (20) peut être fermée en étant réglée par un thermostat (21; 131).
  2. Radiateur à liquide de refroidissement selon la revendication 1, caractérisé en ce que la deuxième entrée de liquide de refroidissement (130) et/ou la deuxième sortie de liquide de refroidissement (20) est reliée à une conduits de dérivation (22; 132) qui bifurque à partir d'un thermostat (11) du moteur ou bien conduit à un thermostat (111) du moteur.
  3. Radiateur à liquide de refroidissement selon l'une ou l'autre des revendication précédentes, caractérisé en ce que la deuxième entrée de liquide de refroidissement (130) et/ou la deuxième sortie de liquide de refroidissement (20) est disposée dans la boite à eau de sortie (6', 106').
  4. Radiateur à liquide de refroidissement selon l'une quelconque des revendications précédentes, caractérisé en ce que la deuxième entrée de liquide de refroidissement (130) et/ou la deuxième sortie de liquide de refroidissement (20) est disposée au-dessus du refroidisseur d'huile de boîte de vitesse (5; 105).
  5. Radiateur à liquide de refroidissement selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le thermostat (21; 131) présente un élément extensible (23) qui pénètre dans la boîte à eau (6; 106).
  6. Radiateur à liquide de refroidissement selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un diviseur d'écoulement (138) est disposé dans la boîte à eau (106), diviseur d'écoulement qui, dans une zone pratiquement exempte d'écoulement de liquide de refroidissement, sépare une zone de capteur du thermostat, de la zone de flux entrant de la deuxième entrée de liquide de refroidissement (130).
  7. Radiateur à liquide de refroidissement selon l'une quelconque des revendications précédentes, caractérisé en ce que la deuxième entrée de liquide de refroidissement (130) et/ou la deuxième sortie de liquide de refroidissement (20) peut être fermée en étant réglée en particulier par une soupape pouvant être commandée électroniquement.
  8. Radiateur à liquide de refroidissement selon la revendication 7, caractérisé en ce que la soupape est un thermostat, en particulier comprenant une élément extensible, radiateur à liquide de refroidissement qui présente en particulier un chauffage servant à la commande du thermostat.
  9. Procédé de régulation d'un radiateur à liquide de refroidissement (7; 107) selon l'une quelconque des revendication 1 à 6, caractérisé en ce que la deuxième entrée de liquide de refroidissement (130) et/ou la deuxième sortie de liquide de refroidissement (20) est réglée par un thermostat (21; 131), en ponction de la température du liquide de refroidissement.
  10. Procédé selon la revendication 9, caractérisé en ce que, lorsque le moteur (3; 103) n'a pas encore atteint sa température de fonctionnement et que l'huile de boîte de vitesses est trop chaude, il se produit une ouverture de la deuxième entrée de liquide de refroidissement (130) et/ou de la deuxième sortie de liquide de refroidissement (20).
  11. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que, en particulier lorsque le monteur (3; 103) n'a pas encore atteint sa température de fonctionnement et que l'huile de boîte de vitesses n'a pas encorde atteint sa température de fonctionnement, il se produit une ouverture de la deuxième entrée de liquide de refroidissement (130) et/ou de la deuxième sortie de liquide de refroidissement (20).
  12. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une ouverture de la deuxième entrée de liquide de refroidissement (130) et/ou de la deuxième sortie de liquide de refroidissement (20) est prédéfinie de l'extérieur, en particulier par chauffage d'un thermostat fermant l'ouverture.
EP05771897A 2004-07-26 2005-07-01 Appareil de refroidissement de fluide refrigerant comprenant un appareil de refroidissement d'huile a engrenages qui est integre dans une des caisses a eau Not-in-force EP1774148B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004036185 2004-07-26
PCT/EP2005/007096 WO2006010430A1 (fr) 2004-07-26 2005-07-01 Appareil de refroidissement de fluide refrigerant comprenant un appareil de refroidissement d'huile a engrenages qui est integre dans une des caisses a eau

Publications (2)

Publication Number Publication Date
EP1774148A1 EP1774148A1 (fr) 2007-04-18
EP1774148B1 true EP1774148B1 (fr) 2013-02-27

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US (1) US20080190597A1 (fr)
EP (1) EP1774148B1 (fr)
WO (1) WO2006010430A1 (fr)

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EP1774148A1 (fr) 2007-04-18
US20080190597A1 (en) 2008-08-14
WO2006010430A1 (fr) 2006-02-02

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