EP1362169B1 - Einrichtung und verfahren zur kühlung einer steuervorrichtung einer brennkraftmaschine - Google Patents

Einrichtung und verfahren zur kühlung einer steuervorrichtung einer brennkraftmaschine Download PDF

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Publication number
EP1362169B1
EP1362169B1 EP02704825A EP02704825A EP1362169B1 EP 1362169 B1 EP1362169 B1 EP 1362169B1 EP 02704825 A EP02704825 A EP 02704825A EP 02704825 A EP02704825 A EP 02704825A EP 1362169 B1 EP1362169 B1 EP 1362169B1
Authority
EP
European Patent Office
Prior art keywords
cooling
circuit
valve
engine
radiator
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
EP02704825A
Other languages
English (en)
French (fr)
Other versions
EP1362169A1 (de
Inventor
Olivier Hibon
René Pannier
Denis Reverseau
Régis GOSSUIN
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Publication of EP1362169A1 publication Critical patent/EP1362169A1/de
Application granted granted Critical
Publication of EP1362169B1 publication Critical patent/EP1362169B1/de
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
    • F01P3/12—Arrangements for cooling other engine or machine parts
    • 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
    • F01P3/20—Cooling circuits not specific to a single part of engine or machine
    • 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
    • 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
    • F01P2050/00—Applications
    • F01P2050/30—Circuit boards
    • 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
    • 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
    • F01P2060/18—Heater
    • F01P2060/185—Heater for alternators or generators

Definitions

  • the present invention relates to a cooling device for a control member of a motor vehicle engine, and to a method for permanently supplying a cooling fluid to a heat exchanger for cooling such an organ. control.
  • the motor vehicle drive motor can be cooled by circulating a coolant, in practice water, which passes through the main parts of the engine to be cooled.
  • the cooling circuit essentially includes a circulation pump driven by the engine and a radiator consisting of a water / air heat exchanger capable of cooling the water circulated by the pump.
  • a thermostatic valve is also generally provided to isolate the portion of the main cooling circuit that contains the radiator during the cold start period where excessive engine cooling is not desired. The thermostatic valve opens gradually according to the temperature of the circulating water, warmed by the engine after the start-up period.
  • the operation of the internal combustion engines requires a fuel supply in the engine cylinders and an exhaust of the burnt gases, these operations being performed by means of valves whose movement is generally controlled by a distribution system adapted to the operating regime of the motor.
  • valves whose movement is generally controlled by a distribution system adapted to the operating regime of the motor.
  • it is planned to control the movement of the various valves by means of an electrohydraulic system called “camless”, in which the movements of the various valves are controlled according to a distribution diagram, the engine load being further controlled by the opening time of the intake valves.
  • valves have a number of disadvantages. In particular, it must be possible to cool the control device properly.
  • the cooling can for example be obtained by a circulation of the cooling water flowing in the main cooling circuit of the engine.
  • the addition, without particular precautions, of a heat exchanger in the main cooling circuit of the engine has the disadvantage that the cooling is not suitably done in a constant manner during the starting phases of the engine when the Thermostatic valve is closed and during normal operating phases when the thermostatic valve is open.
  • Another solution of using an independent cooling circuit also requires an additional electric water pump and at least one solenoid valve, which complicates the overall structure and increases the cost and the risk of breakdowns.
  • the present invention aims to eliminate these difficulties and to ensure the cooling of a control member of a motor vehicle combustion engine, for example the valve control system, which allows constant and permanent cooling whatever the state of the thermostatic valve.
  • the invention also aims to continuously supply a heat exchanger coolant from the main cooling circuit of the engine, regardless of the position of the thermostatic valve.
  • the cooling device of the invention is intended to cooperate with a control member of a motor vehicle combustion engine.
  • the device comprises a main flow circuit of a coolant passing through the engine and including a circulation pump, a thermostatic valve and a radiator.
  • a heat exchanger capable of cooling the control member is mounted in a secondary circuit, downstream of the radiator, between said radiator and the circulation pump.
  • a restriction is mounted in the main circuit in parallel with the exchanger. In this way, a branch of the secondary circuit connecting the exchanger to the restriction, is the coolant flows in one direction or the other, depending on whether the theostatic valve is open or closed.
  • an air-source heat exchanger for heating the passenger compartment of the vehicle is further mounted in the main circuit downstream of the thermostatic valve, with its return pipe connected upstream of the restriction.
  • control member is adapted to act on the engine valves.
  • the invention also relates, in a more general manner, to a process for the permanent supply of cooling liquid to a heat exchanger mounted in a secondary circuit which is bypassed by a main flow circuit, a portion of which can be isolated by a closing valve.
  • a process for the permanent supply of cooling liquid to a heat exchanger mounted in a secondary circuit which is bypassed by a main flow circuit, a portion of which can be isolated by a closing valve.
  • an inversion of the direction of flow in a branch of the secondary circuit is automatically operated as a function of the position of the closure valve, by means of a pressure drop generated in a portion of the main circuit.
  • the valve closes when the temperature of the coolant reaches a predetermined value.
  • the method of the invention is particularly advantageous when the heat exchanger is used to cool a control member of the valves of a heat engine, especially in a motor vehicle.
  • the cooling device of the invention is used in combination with a heat engine shown schematically by the broken frame 1.
  • the heat engine 1 is cooled by a circulation of water flowing in a main flow circuit 2 which includes a circulation pump 3, a thermostatic valve 4 and a radiator 5 placed outside the engine 1.
  • the circuit 2 can be more or less filled with water of cooling through the existence of a filling jar 6 acting as an expansion vessel and mounted in bypass ducts 7 and 8 on the air / water heat exchanger which constitutes the radiator 5.
  • the cooling water conveyed by the pipe 9 passes through the thermostatic valve 4, the opening and closing of which are controlled by an expansion element 4a on which the temperature of the water passing through the thermo valve acts. static 4.
  • the passenger compartment of the motor vehicle which is equipped with the engine 1 comprises a heating device including a heater 10 in the form of an air / water heat exchanger which is supplied with water cooling circuit of the main circuit 2 directly from the thermostatic valve 4 through the pipe 11.
  • the output of the heater 10 is connected by the pipe 11 a to a secondary circuit 13, in which is mounted a heat exchanger 14 capable of cooling the control system of the different valves of the engine 1, this system not being shown in the figure.
  • the outlet pipe 11a from the heater 10 opens at point 12 in a branch 15 of the secondary circuit 13, the branch 15 containing a restriction 16, capable of creating a pressure drop in the flow.
  • the water flowing in the pipe 11a at the outlet of the heater 10 separates at the point 12 in two flows, the first by the branch 15, and the second by a branch 17 of the secondary circuit 13.
  • the heat exchanger 14 receives cooling water through line 18 which is connected to point 19 at branch 17. At the outlet of the exchanger 14, the water returns via the pipe 20 downstream of the restriction 16 to the point 21.
  • the outlet pipe 22 of the restriction 16 returns to the intake of the circulation pump 3 by passing through the motor 1 so to cool the appropriate parts.
  • the circulation of the cooling water in the radiator 5 is done through the supply line 26 whose input is more or less closed by the thermostatic valve 4 depending on the temperature of the cooling water passing through the valve 4.
  • the cooling water passed through the radiator 5 returns via the pipe 27 to the branch 17 of the secondary circuit 13 at point 19.
  • the cooling water does not enter the pipe 26 and therefore does not cross the radiator 5. It is this is shown in fine lines in Figure 2.
  • the cooling water circulated by the pump 3 flows through the pipe 9 through the valve 4, and then through the pipe 11 through the heater 10, the pipes in which the cooling water circulates having been shown in Figure 2 in lines of greater width.
  • the water coming from the pipe 11a separates into two flows.
  • the first branch 15 passes through the restriction 16 which creates a pressure drop, then returns through line 22 on the circulation pump 3.
  • the second flow also returns to the circulation pump 3, this time through the branch 17 then by the heat exchanger 14 through the secondary circuit 13. This second flow avoids the pressure drop due to the restriction 16.
  • the alternator 23 is supplied by the pipe 24 in cooling water from the heater 10.
  • FIG 3 illustrates the different flows in the device of the invention when the thermostatic valve 4 is fully open.
  • all of the cooling water from the heater 10 through line 11a is directed by branch 15 through restriction 16 to return via line 22 to the circulation pump 3.
  • the valve thermostatic 4 being open, the cooling water also flows into the pipe 26, passes through the radiator 5 and back through the pipe 27 to point 19 where the flow separates into two parts.
  • the first part passes through the heat exchanger 14 through the secondary circuit 13 before returning to the circulation pump 3 via the pipe 22.
  • the second part flows through the branch 17, passes through the restriction 16 before return via line 22 to the circulation pump 3.
  • the circulation of the water in the branch 17 has therefore been reversed compared to that which existed when the thermostatic valve 4 was closed, as illustrated in FIG. 2.
  • the flow rate in the radiator 5 is here maximum, as in the exchanger 14.
  • the exchanger 14 is traversed by water which has been cooled by the radiator 5, which improves the cooling of the valve control system.
  • the device of the invention thus makes it possible to obtain an automatic flip-flop of the direction of flow in the branch 17 of the secondary circuit 13, the supply of cooling water for the heat exchanger 14 being done either by the water cooling from the heater 10 or the main cooling circuit in the case where no heater is provided, or by the cooling water from the radiator 5 when the thermostatic valve 4 is open.

Landscapes

  • 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)
  • Air-Conditioning For Vehicles (AREA)

Claims (6)

  1. Vorrichtung zur Kühlung eines Steuerorgans eines Kraftfahrzeug-Verbrennungsmotors, die einen Kühlflüssigkeit-Hauptströmungskreislauf aufweist, der den Motor (1) durchquert und eine Kreislaufpumpe (3), ein thermostatisches Ventil (4) und einen Kühler (5) enthält, dadurch gekennzeichnet, dass ein Wärmetauscher (14), der in der Lage ist, das Steuerorgan zu kühlen, in einen Sekundärkreislauf (13) hinter dem Kühler zwischen dem Kühler (5) und der Kreislaufpumpe (3) montiert ist, dass eine Drossel (16) parallel zum Wärmetauscher (14) in den Hauptkreislauf eingebaut ist, wobei ein Zweig (17) des Sekundärkreislaufs, der den Wärmetauscher (14) mit der Drossel (16) verbindet, von der Kühlflüssigkeit in der einen oder anderen Richtung durchflossen wird, je nachdem, ob das thermostatische Ventil (4) offen oder geschlossen ist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ein Luftwärmetauscher (10), der zur Erwärmung der Fahrgastzelle des Fahrzeugs bestimmt ist, in den Hauptkreislauf hinter dem thermostatischen Ventil (4) montiert ist, wobei seine Rückleitung (11a) vor der Drossel verbunden ist.
  3. Vorrichtung nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, dass das Steuerorgan auf die Ventile des Motors einwirkt.
  4. Verfahren zur permanenten Speisung eines Wärmetauschers (14) mit Kühlflüssigkeit, der in einen Sekundärkreislauf (13) in Ableitung von einem Hauptströmungskreislauf (2) montiert ist, von dem ein Teil durch ein Schließventil (4) isoliert werden kann, bei dem eine Umkehr der Fließrichtung in einem Zweig (17) des Sekundärkreislaufs automatisch in Abhängigkeit von der Stellung des Schließventils (4) mit Hilfe eines Druckverlusts durchgeführt wird, der in einem Abschnitt des Hauptkreislaufs erzeugt wird.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass das Ventil (4) sich schließt, wenn die Temperatur der Kühlflüssigkeit einen bestimmten Wert erreicht.
  6. Verfahren nach den Ansprüchen 4 oder 5, dadurch gekennzeichnet, dass der Wärmetauscher (14) verwendet wird, um ein Steuerorgan der Ventile eines Wärmemotors zu kühlen.
EP02704825A 2001-02-19 2002-02-14 Einrichtung und verfahren zur kühlung einer steuervorrichtung einer brennkraftmaschine Expired - Lifetime EP1362169B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0102225 2001-02-19
FR0102225A FR2821120B1 (fr) 2001-02-19 2001-02-19 Dispositif et procede de refroidissement d'un organe de commande d'un moteur thermique
PCT/FR2002/000560 WO2002066804A1 (fr) 2001-02-19 2002-02-14 Dispositif et procede de refroidissement d'un organe de commande d'un moteur thermique

Publications (2)

Publication Number Publication Date
EP1362169A1 EP1362169A1 (de) 2003-11-19
EP1362169B1 true EP1362169B1 (de) 2006-09-06

Family

ID=8860184

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Application Number Title Priority Date Filing Date
EP02704825A Expired - Lifetime EP1362169B1 (de) 2001-02-19 2002-02-14 Einrichtung und verfahren zur kühlung einer steuervorrichtung einer brennkraftmaschine

Country Status (5)

Country Link
EP (1) EP1362169B1 (de)
DE (1) DE60214515T2 (de)
ES (1) ES2266450T3 (de)
FR (1) FR2821120B1 (de)
WO (1) WO2002066804A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2875885B1 (fr) * 2004-09-27 2006-12-01 Renault Sas Dispositif de refroidissement d'une boite de vitesses automatique de vehicule automobile et procede associe
FR2883807B1 (fr) * 2005-04-01 2008-09-12 Renault Sas Dispositif et procede de refroidissement du moteur et d'un organe de vehicule
ES2334616A1 (es) * 2008-02-04 2010-03-12 Universidade De Santiago De Compostela Limitador superconductor de corriente integrado en el intercambiador de calor de un refrigerador termoacustico.
FR2945482B1 (fr) * 2009-05-18 2011-05-06 Peugeot Citroen Automobiles Sa Restriction reglable, circuit de circulation d'un fluide et vehicule equipe de cette restriction

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2341041A1 (fr) * 1976-02-10 1977-09-09 Chausson Usines Sa Dispositif pour la regulation de la temperature d'un moteur diesel suralimente
FR2659127B1 (fr) * 1990-03-05 1992-07-03 Peugeot Raccord a quatre voies de forme compacte et son utilisation sur le circuit de refroidissement d'un vehicule automobile.
JP3555269B2 (ja) * 1995-08-31 2004-08-18 株式会社デンソー 車両用冷却水温度制御システム
FR2748428B1 (fr) * 1996-05-07 1998-06-19 Renault Systeme de refroidissement pour vehicule a propulsion hybride
JP3111922B2 (ja) * 1997-04-02 2000-11-27 トヨタ自動車株式会社 電磁弁を備えた内燃機関のシリンダヘッド構造

Also Published As

Publication number Publication date
DE60214515D1 (de) 2006-10-19
ES2266450T3 (es) 2007-03-01
EP1362169A1 (de) 2003-11-19
FR2821120B1 (fr) 2003-04-18
FR2821120A1 (fr) 2002-08-23
DE60214515T2 (de) 2007-02-15
WO2002066804A1 (fr) 2002-08-29

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