EP0860592B1 - Circuit de refroidissement pour un train moteur de véhicule automobile - Google Patents

Circuit de refroidissement pour un train moteur de véhicule automobile Download PDF

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Publication number
EP0860592B1
EP0860592B1 EP98100652A EP98100652A EP0860592B1 EP 0860592 B1 EP0860592 B1 EP 0860592B1 EP 98100652 A EP98100652 A EP 98100652A EP 98100652 A EP98100652 A EP 98100652A EP 0860592 B1 EP0860592 B1 EP 0860592B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
coolant
cooling liquid
valve
additional
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
EP98100652A
Other languages
German (de)
English (en)
Other versions
EP0860592A1 (fr
Inventor
Martin Brielmair
Christian Absmeier
Axel Temmesfeld
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
Original Assignee
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
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Publication of EP0860592A1 publication Critical patent/EP0860592A1/fr
Application granted granted Critical
Publication of EP0860592B1 publication Critical patent/EP0860592B1/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
    • 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
    • F01P3/00—Liquid cooling
    • F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
    • F01P2003/182—Arrangements or mounting of liquid-to-air heat-exchangers with multiple heat-exchangers
    • 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
    • F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
    • F01P2003/185—Arrangements or mounting of liquid-to-air heat-exchangers arranged in parallel
    • 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
    • F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
    • F01P2003/187—Arrangements or mounting of liquid-to-air heat-exchangers arranged in series
    • 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
    • F01P2007/143—Controlling of coolant flow the coolant being liquid using restrictions
    • 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
    • F01P2025/50—Temperature using two or more temperature sensors
    • 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
    • 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
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/06—Retarder

Definitions

  • the invention relates to a coolant circuit of a motor vehicle drive unit according to that mentioned in the preamble of claim 1 Art.
  • Such a coolant circuit is known, in addition to further exemplary embodiments, from FIG. 8 in FR 2 682 160 A1.
  • the drive unit becomes hot coolant in a first coolant circuit from a pump thermostatically controlled by an air-coolant heat exchanger pumped, cooled by this and the Drive unit returned at a lower temperature.
  • the Air-coolant heat exchanger and the pump is one, the coolant volume flow influencing nozzle arranged.
  • the additional heat exchanger can also be used as a coolant / oil heat exchanger be designed for tempering oil.
  • the object of the invention is an accurate and low-loss pressure-dependent To represent coolant volume flow control, which has a large control range has.
  • This object is achieved by the features in the characterizing Part of claim 1 solved.
  • This solution is characterized by this that they are passive, that is, without active control, purely pressure-dependent is working. Due to the misaligned bearing of the throttle valve opens Throttle valve automatically as soon as in the direction of flow in front of the throttle valve a higher coolant pressure than behind (pressure difference) is present.
  • the size of the spring preload can advantageously be very precise Pressure difference from which the throttle valve opens; about the spring characteristic (force-travel / angle of rotation) can be influenced to reduce the throttle behavior. Since the throttle valve is practically none when fully opened An obstacle to flow is the integration into an existing one Pipe / hose system without a pipe / hose cross-sectional enlargement possible without generating major flow losses.
  • the flow temperature to the additional heat exchanger depending after the desired tempering in a wide temperature range can be set.
  • reference numeral 1 designates an internal combustion engine functioning as a motor vehicle drive unit, which is water-cooled and the cooling liquid of which, as usual, can be recooled in an air-cooling liquid heat exchanger 2, the flow of which is identified by the reference number 19.
  • the coolant is conveyed by a coolant pump 3, which, as usual, is preceded by a thermostatic valve 4, by means of which the coolant can be circulated either via the heat exchanger 2 or in the so-called "small circuit" bypassing the air-coolant heat exchanger 2.
  • the direction of flow of the coolant is shown by arrows.
  • a heating heat exchanger 5 is provided in the coolant circuit, which is preceded by a control valve 6.
  • Reference number 7 also denotes a conventional expansion tank, which is connected to the flow 19 of the air-coolant heat exchanger 2 is.
  • a coolant bypass leads through this expansion tank 7 21 through, which branches from the lead 19, and which within the expansion tank 7 a so-called.
  • Throttle branch 22 has.
  • This so-called throttle branch 22, one opposite the coolant branch line 20 has a significantly smaller flow cross section has, the expansion tank 7 is thus as usual connected the entire coolant circuit.
  • Another component of the coolant circuit is an additional heat exchanger 8, about the u. a. recooled coolant (from a branch 20 coming in the return 12 of the air-coolant heat exchanger 2) is feasible, and in which this is another medium, such as hydraulic oil / gear oil can cool.
  • This additional heat exchanger 8 is also a thermostatic valve 9 upstream, in which the recooled coolant with non-recooled coolant - from said coolant bypass 21 coming - can be mixed in order in the additional heat exchanger 8 a desired temperature control of the one guided by it To be able to adjust the medium (hydraulic oil / gear oil).
  • additional cooler 10 In order to cool the additional heat exchanger 8 particularly intensively To enable medium is the air-coolant heat exchanger 2 another so-called additional cooler 10 is connected downstream.
  • This additional cooler 10 is thus in the lead 11 of the additional heat exchanger 8, in which the thermostatic valve 9 is provided and is from the return 12 of the Air-coolant heat exchanger 2 from the branch 20 with coolant provided.
  • the additional cooler 10 which is also an air-coolant heat exchanger is formed, preferably forms with the actual air-coolant heat exchanger 2 a structural unit, as in the not previously published German patent application 196 37 818 is described.
  • valve 13 does not exist, because of the flow resistance of the Additional cooler 10 and the additional heat exchanger 8 namely almost the complete exits from the air-coolant heat exchanger 2 Coolant flow directly (via the return 12) to the thermostatic valve 4 arrive, so that the additional heat exchanger 8 not at all would be flowed through.
  • a suitable throttling effect of the valve 13 it is possible, however, a more or less large proportion of the Coolant flow also via the additional heat exchanger 8 to the coolant pump 3 attributed.
  • valve 13 Only satisfactorily (additional) valve 13 if this Valve 13 as a throttle valve pretensioned in the closed position (cf. Fig. 2, reference numeral 14) is formed.
  • this valve 13 or the corresponding throttle valve remains 14 almost closed, so that (when the thermostatic valve is open 4) the air-coolant heat exchanger 2 as desired after flowing through the coolant leaving it almost completely passed through the additional cooler 10 and via the additional heat exchanger 8 becomes.
  • valve 13 designed as a throttle valve 14 is opened ever further, so that then the drive unit 1 or the internal combustion engine 1 on direct Ways (via the return 12) with a sufficient amount of im Air-coolant heat exchanger 2 recooled coolant supplied can be.
  • Fig. 2 shows a cross section through the as biased in the closed position Throttle valve 14 formed valve 13, soft with its valve housing 15 when the air-coolant heat exchanger 2 and the As already briefly mentioned, additional cooler 10 form a structural unit, preferably in the return nozzle of the air-coolant heat exchanger, not shown 2, to which the return 12 connects, can be arranged can.
  • the throttle valve 14 is located on the valve housing 15 biasing torsion spring 16 biased, the throttle valve 14 over its axis of rotation 17 is desaxially mounted in the valve housing 15. hereby acts the valve 13 or the throttle valve 14 with regard to coolant flow direction shown by an arrow 18 as Back pressure flap with respect to this flow, due to said Desaxing, depending on the dynamic pressure, the desired opening of the throttle valve 14 or the valve 13 takes place. In the case of insufficient back pressure, however this valve 13 remains fully or partially closed and leads then, depending on the dynamic pressure, the desired throttle function.
  • the throttle valve 14 itself can be made of brass, while the flap housing 15 and the torsion spring 16, the spring characteristics of which determine the throttle behavior of the valve 13, can be made of stainless steel.
  • this and a large number of further details can be designed quite differently from the exemplary embodiment shown, without departing from the content of the patent claims.

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)
  • Air-Conditioning For Vehicles (AREA)

Claims (3)

  1. Circuit de refroidissement d'un groupe moteur de véhicule automobile, comprenant :
    un échangeur thermique air-liquide (2),
    au moins un échangeur thermique auxiliaire (8) dans lequel un autre fluide peut avoir sa température réduite par le liquide de refroidissement circulant, une soupape (13) agissant sur le débit volumique du fluide de refroidissement étant montée sur le retour (12) de l'échangeur (2) en aval d'une déviation (20) conduisant à l'échangeur thermique auxiliaire (8), tandis que sur l'amenée (11) de l'échangeur auxiliaire (8) est monté un refroidisseur complémentaire (10),
    caractérisé en ce que
    la soupape (13) est un clapet d'étranglement (14) chargé par un ressort avec précontrainte en position de fermeture, l'axe du clapet étant décentré par rapport au boítier de clapet (15).
  2. Circuit de refroidissement selon la revendication 1,
    caractérisé en ce que
    le refroidisseur complémentaire (10) forme avec l'échangeur thermique air-liquide (2) une unité et le clapet d'étranglement (14) est monté dans la tubulure de retour de l'échangeur (2).
  3. Circuit de refroidissement selon la revendication 1 ou 2,
    caractérisé en ce qu'
    une soupape thermostatique (9) montée dans l'amenée (11) à l'échanger thermique auxiliaire (8) permet d'introduire dans ce dernier du fluide de refroidissement soit refroidi par le refroidisseur complémentaire (10), soit venant de l'amenée (19) à l'échangeur thermique air-liquide (2) et donc non refroidi, soit un mélange des deux.
EP98100652A 1997-02-20 1998-01-15 Circuit de refroidissement pour un train moteur de véhicule automobile Expired - Lifetime EP0860592B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19706800 1997-02-20
DE19706800A DE19706800A1 (de) 1997-02-20 1997-02-20 Kühlflüssigkeitskreislauf eines Kraftfahrzeug-Antriebsaggregates

Publications (2)

Publication Number Publication Date
EP0860592A1 EP0860592A1 (fr) 1998-08-26
EP0860592B1 true EP0860592B1 (fr) 2002-04-17

Family

ID=7820981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98100652A Expired - Lifetime EP0860592B1 (fr) 1997-02-20 1998-01-15 Circuit de refroidissement pour un train moteur de véhicule automobile

Country Status (2)

Country Link
EP (1) EP0860592B1 (fr)
DE (2) DE19706800A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
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DE19943004B4 (de) * 1999-09-09 2004-11-18 Dr.Ing.H.C. F. Porsche Ag Kühleinrichtung für eine Brennkraftmaschine
DE10035480A1 (de) * 2000-07-21 2002-01-31 Zahnradfabrik Friedrichshafen Schiffsgetriebe mit Heizvorrichtung
GB2366365B (en) * 2000-08-26 2004-07-21 Land Rover Group Ltd Engine Cooling Systems
SE525993C2 (sv) 2003-10-15 2005-06-07 Volvo Lastvagnar Ab Arrangemang för kylning av fordonskomponent samt fordon innefattande ett dylikt arrangemang
DE102007025149A1 (de) 2007-05-30 2008-12-04 Bayerische Motoren Werke Aktiengesellschaft Kühlsystem für eine Brennkraftmaschine
US8162797B2 (en) * 2009-02-04 2012-04-24 Ford Global Technologies, Llc Methods and systems for heating transmission fluid
DE102017213777B4 (de) * 2017-08-08 2022-02-17 Audi Ag Verfahren zum Betreiben einer Antriebseinrichtung eines Kraftfahrzeugs mit mehreren Kühlmittelkühlern sowie entsprechende Antriebseinrichtung

Citations (1)

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Publication number Priority date Publication date Assignee Title
DE19526144A1 (de) * 1995-07-18 1997-01-23 Pierburg Ag Anordnung einer Drosselklappe

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DE19526144A1 (de) * 1995-07-18 1997-01-23 Pierburg Ag Anordnung einer Drosselklappe

Also Published As

Publication number Publication date
DE19706800A1 (de) 1998-08-27
EP0860592A1 (fr) 1998-08-26
DE59803811D1 (de) 2002-05-23

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