EP2112347B1 - Kühlmittelkreislauf eines Motors - Google Patents

Kühlmittelkreislauf eines Motors Download PDF

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Publication number
EP2112347B1
EP2112347B1 EP09155629.0A EP09155629A EP2112347B1 EP 2112347 B1 EP2112347 B1 EP 2112347B1 EP 09155629 A EP09155629 A EP 09155629A EP 2112347 B1 EP2112347 B1 EP 2112347B1
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EP
European Patent Office
Prior art keywords
coolant
valve
outlet box
opening
cooling
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.)
Active
Application number
EP09155629.0A
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English (en)
French (fr)
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EP2112347A1 (de
Inventor
Pierre Dumoulin
Armel Le Lievre
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.)
PSA Automobiles SA
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PSA Automobiles SA
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Publication date
Application filed by PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP2112347A1 publication Critical patent/EP2112347A1/de
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Publication of EP2112347B1 publication Critical patent/EP2112347B1/de
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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
    • F01P11/0285—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
    • 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
    • F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
    • 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
    • F01P2060/02—Intercooler
    • 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

Definitions

  • the invention relates to the cooling circuits of motor vehicle engines, and in particular the structure of coolant outlet housings receiving the heated coolant from the engine and provided with means for measuring a temperature of the liquid located in the engine.
  • the box is the structure of coolant outlet housings receiving the heated coolant from the engine and provided with means for measuring a temperature of the liquid located in the engine.
  • the document FR 2 903 143 discloses a motor vehicle engine cooling circuit.
  • This circuit comprises a water outlet housing provided with a temperature sensor and a thermostat.
  • the housing comprises an outlet main pipe for transporting water to a radiator whose function is to cool said water, the cooled water being then conveyed by means of a pipe to the inlet of a water pump located upstream of the engine.
  • the pump helps to circulate the cooled water in the engine and the heated water is then recovered in the housing.
  • the housing comprises a first secondary water outlet pipe for supplying a heater with water and whose function is to create heating in the passenger compartment of the motor vehicle. The water recovered at the outlet of the heater is routed to the pump inlet for re-injection into the engine cooling circuit.
  • the circulation of water in this first secondary pipe is controlled by means of a first solenoid valve placed between the housing and the heater.
  • the housing has a second secondary outlet pipe which connects directly to the pipe connecting the radiator to the inlet of the pump, and constituting a bypass portion bypassing the radiator and the heater.
  • Water circulation in the second secondary pipe is controlled by means of a second solenoid valve, more precisely a proportional solenoid valve placed between the housing and the inlet of the pump.
  • This bypass portion directly sends the heated water from the engine to the upstream portion of the cooling circuit positioned before said engine.
  • a 4 mm diameter branch tubing connects the housing part where the temperature sensor is installed to the pump inlet.
  • the tubing has no means of closure and remains permanently open and thus ensures a low flow of water near the probe when the connection to the radiator has been cut.
  • a degassing housing receives coolant through a pipe from the radiator, and another pipe from the outlet housing.
  • the degassing box eliminates bubbles in the coolant.
  • the pipe coming from the outlet housing is in particular a motor protection against breaks in the cylinder head gasket. The water recovered at the outlet of said housing is fed back into the pipe joining the radiator at the inlet of the pump.
  • the invention aims to solve one or more of these disadvantages.
  • the invention thus relates to a cooling circuit of an engine according to the subject of claim 1.
  • no duct directly connects the outlet box to the degassing box.
  • the circuit includes a diesel engine delivering coolant in the outlet housing.
  • the circuit further comprises an automatic transmission cooling exchanger equipped with a temperature probe and a pump receiving cooling liquid from the radiator via a conduit in which a circuit withdraws coolant in the conduit, passes through the cooling exchanger and delivers the coolant into the conduit, and wherein the open command controls the opening of the first valve when the temperature measured by the probe temperature exceeds a second threshold.
  • the circuit does not have a bypass between a point upstream of the automatic transmission cooling exchanger and a point of the cooling circuit downstream of the output box.
  • the circuit includes a coolant temperature probe in the output housing, the opening control controlling the opening of the first valve when the temperature measured by the temperature sensor exceeds the first threshold.
  • the circuit further comprises a heater adapted to receive cooling liquid from the outlet housing; a second valve closing the flow of coolant between the outlet box and the heater; a pump suitable for discharging coolant into the aerator when the internal combustion engine is stopped ; and the opening command controlling the opening of the second valve when the internal combustion engine is stopped.
  • the circuit further comprises a pump driving the cooling liquid into the engine, an output of the heater being connected to this pump; a bypass conduit directly connecting the output box to said pump; and, a third valve closing the coolant flow in the bypass duct, the control selectively controlling the opening of the third valve.
  • the circuit comprises a secondary radiator; an intake air cooling exchanger, adapted to receive coolant from the engine and to discharge this coolant in the output housing; a pump generating a flow between the intake air exchanger and the secondary radiator in a secondary circuit; the outlet housing being provided with a fourth valve closing the flow of coolant from the intake air cooling exchanger; the command intermittently controlling the stopping of the pump and the opening of the fourth valve.
  • the output housing further comprises a sliding actuator whose position defines the opening or closing of the first to fourth valves.
  • the invention provides a cooling circuit provided with a coolant outlet housing separated from a cooling radiator by a shut-off valve opening when the coolant temperature in the housing exceeds a threshold.
  • a degassing housing receives coolant from the radiator.
  • a valve opening command controls intermittent valve openings even when the temperature of the coolant in the outlet housing is below said threshold.
  • the invention allows intermittently degassing the coolant in the water box without complicating the cooling circuit, without impairing the warming of the engine.
  • the invention is particularly useful when the engine used is of the diesel type, this type of engine having a slower rise in temperature, and therefore a lower frequency of opening of the valve putting the output box in communication with the radiator.
  • the figure 1 illustrates a cooling circuit 1 of an internal combustion engine 2.
  • the circuit 1 comprises a casing 3 of coolant outlet.
  • a temperature sensor 4 and a thermostatic valve 5 are arranged in the outlet housing 3.
  • the thermostatic valve 5 selectively releases the flow of liquid between the outlet housing 3 and a radiator 7 above a threshold temperature.
  • the function of the radiator 7 is to cool the coolant, in this case water, flowing in the cooling circuit 1.
  • the thermostatic valve 5 closes one end of a duct 6 joining the outlet housing 3 and the radiator 7.
  • a duct 9 brings the cooling liquid of the radiator 7 to a pump 8.
  • the pump 8 delivers the cooling liquid into the pipes of the engine 2. After having passed through these pipes, the coolant is received in the outlet housing 3. Part of the coolant discharged into these engine pipes passes through a water / oil radiator 20.
  • a conduit 19 discharges the cooling liquid from the water radiator / oil 20 in the outlet housing 3.
  • the cooling circuit 1 further comprises a first secondary pipe 10 connecting the outlet housing 3 to the pump 8.
  • the circuit comprises a peripheral connected in the secondary pipe 10, in this case a heater 11.
  • the cooling circuit 1 comprises a second secondary pipe 13 connecting the outlet housing 3 to the pipe 9 via a valve 14.
  • This secondary pipe 13 makes it possible to directly send heated water from the engine 2 to the pump 8, so that that coolant reaches the pump 8 with a lower pressure drop than that generated by the heater 11 in the secondary pipe 10.
  • the solenoid valve 14 is in particular open during the starting phases of the engine 2 to accelerate its operation. warming speed.
  • a degassing housing 18 is intended to remove bubbles present in the coolant.
  • the housing 18 receives cooling liquid from the radiator 7 via a pipe 17.
  • the degassed cooling liquid is discharged into the pipe 9.
  • an opening command of the valve 5 causes intermittent openings of this valve even when the temperature of the coolant in the outlet housing 3 is below the opening threshold.
  • the intermittent openings of the valve 5 make it possible to degas the coolant from the outlet housing 3 without unduly delaying the heating of the engine 2 and without increasing the complexity of the cooling circuit.
  • the illustrated cooling circuit has no conduit directly connecting the outlet housing 3 to the degassing housing 18.
  • the control can control the opening of the valve 5 according to the ambient temperature, the water temperature and the information concerning the engine speed or load. In the starting phase of the engine, if the water temperature is equal to the ambient temperature, the control can open the valve 5 for several seconds. The control can make intermittent openings of the valve 5 with a duty cycle advantageously less than 5%.
  • an automatic gearbox 24 serves as transmission to the engine 2.
  • the gearbox 24 comprises a cooling exchanger 25, typically of water / oil type, as well as a temperature sensor 26.
  • a conduit 22 withdraws coolant on the pipe 9 downstream of the radiator 7 and delivers it to the inlet of the exchanger 25.
  • a pipe 23 draws coolant at the outlet of the exchanger 25 and delivers it to the pipe 9 downstream of the sewing of the pipe 22.
  • a cooling water circuit thus feeds the exchanger 25.
  • the control opens the valve 5 when the temperature measured by the temperature sensor 26 exceeds a threshold, even when the temperature in the outlet housing 3 is less than the opening threshold of the valve 5.
  • the automatic gearbox 24 can be cooled even during a heating phase of the engine 2, without for ant require a complex cooling circuit.
  • the cooling circuit 1 illustrated does not show a shunt between a point upstream of the cooling exchanger 25 and a point of the cooling circuit downstream of the outlet housing 3.
  • the opening of the valve 5 may also be controlled according to additional information from the gearbox.
  • the opening of the valve 5 will be electronically controlled.
  • the temperature probe 4 will allow the control to determine when the temperature of the coolant in the outlet housing exceeds the threshold beyond which the engine 2 is to be cooled.
  • the valve 5 will then be open beyond this threshold.
  • the thermostatic valve may of course include a security causing its automatic opening when the liquid of cooling reaches a temperature too high.
  • the valve may thus comprise a wax member whose expansion causes it to open.
  • the outlet housing 3 further comprises a valve closing the flow of the coolant to the heater 11.
  • the control can open this valve and close the valve 5, to allow the supply of the heater with coolant that has not been cooled in the radiator 7.
  • a lending function conditioning of the passenger compartment may in particular be carried out.
  • the flow in the heater 11 may be generated by means of a dedicated pump.
  • the cooling circuit 1 also comprises an intake air cooling circuit, used, for example, for cooling compressed intake air by a turbine.
  • a pump 27 delivers cooling liquid into a conduit 30 leading to an inlet of an air / water intake air heat exchanger 31.
  • An outlet of the exchanger 31 delivers the cooling liquid to a secondary radiator 21 via a The radiator 21 is typically disposed in the front of the vehicle, close to the radiator 7.
  • An inlet of the exchanger 31 receives coolant from the engine 2. In this case, this inlet receives coolant from the pipe 19.
  • An outlet of the exchanger 31 is connected to the outlet housing 3 via a conduit 29.
  • a valve closes the communication between the exchanger 31 and the housing of 3.
  • this valve will be closed and the pump 27 will be engaged so that the radiator 21 cools the coolant through the exchanger 31.
  • this valve will be open and pump 27 will be stopped, so that hot coolant will be taken from the pipe 19, pass through the heat exchanger 31 to heat the intake air, and will be discharged into the outlet housing 3.
  • the control will realize the opening of this valve as a function of information on the need for hot air at the engine inlet, depending on the outside temperature, as a function of the temperature measured by the probe 4 and according to the engine speed or load.
  • the figure 2 schematically represents a coolant outlet box 3 and its valves for supplying different parts of the cooling circuit 1.
  • the valve 34 closes the pipe 10 towards the heater 11.
  • the valve 33 closes the pipe 29 coming from the exchanger 31.
  • the valve 35 closes the pipe 13.
  • the control 32 controls the opening and closing of these valves.
  • the figure 3 represents the circuit supplied during an intermittent opening of the valve 5. Coolant is discharged through the outlet housing 3 into the radiator 7. Coolant is discharged by the radiator 7 into the degassing housing 18, and in the exchanger 25. The coolant exiting the degassing housing 18 and the exchanger 25 is discharged to the outlet housing 3.
  • the figure 4 represents the circuit 1 supplied during an opening of the valve 34 when the engine 2 is stopped.
  • Valve 34 is open, while valves 5,33 and 35 are closed.
  • the coolant is discharged through the outlet housing 3 to the heater 11, passes through the motor and is forced into the outlet housing 3.
  • the figure 5 represents the circuit 1 supplied during a heating of the intake air.
  • the valve 35 is open so that the flow rate discharged by the pump 8 into the engine 2 is increased. Coolant from the engine 2 passes through the exchanger 31.
  • the valve 33 is open, so that the coolant discharged by the exchanger 31 is received by the outlet housing 3.
  • the outlet housing 3 may comprise a sliding actuator whose position defines the opening or closing of the valves 5, 33, 34 and 35.
  • the valves 5, 33, 34 and 35 may be all or nothing or proportional valves.

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  • 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 (8)

  1. Kühlmittelkreislauf (1) eines Motors, der ein Ausgangsgehäuse (3) des Kühlmittels, das von dem Motor (2) kommt, umfasst; einen Kühler (7), um das Kühlmittel, das von dem Ausgangsgehäuse kommt, zu kühlen; ein Entgasungsgehäuse (18) des Kühlmittels, das von dem Kühler kommt; ein erstes Ventil (5), das das Abfließen der Kühlflüssigkeit zwischen dem Ausgangsgehäuse und dem Kühler verschließt, wobei das erste Ventil (5) öffnet, wenn die Temperatur des Kühlmittels in dem Ausgangsgehäuse (3) einen ersten Schwellenwert überschreitet, der außerdem eine Steuerung (32) des Öffnens ersten Ventils (5) umfasst, die intermittierendes Öffnen des ersten Ventils (5) auch steuert, wenn die Temperatur der Kühlflüssigkeit in dem Ausgangsgehäuse (3) niedriger ist als der erste Schwellenwert, dadurch gekennzeichnet, dass keine andere Leitung das Ausgangsgehäuse (3) mit dem Entgasungsgehäuse (18) verbindet.
  2. Kühlmittelkreislauf nach Anspruch 1, der einen Dieselmotor aufweist, der Kühlflüssigkeit in das Ausgangsgehäuse (3) fördert.
  3. Kühlmittelkreislauf nach einem der vorstehenden Ansprüche, die außerdem einen Kühlaustauscher (25) eines Automatikgetriebes (24) umfasst, der mit einer Temperatursonde (26) versehen ist; eine Pumpe, die Kühlflüssigkeit von dem Kühler (7) über eine Leitung (9) empfängt; wobei ein Kreislauf (22, 23) Kühlflüssigkeit in der Leitung (9) entnimmt, den Kühlaustauscher (25) durchquert und die Kühlflüssigkeit in die Leitung (23) fördert, und wobei die Öffnungssteuerung (32) das Öffnen des ersten Ventils (5) steuert, wenn die Temperatur einen zweiten Schwellenwert überschreitet.
  4. Kühlkreislauf nach einem der vorstehenden Ansprüche, der eine Sonde der Temperatur (4) der Kühlflüssigkeit in dem Kühlgehäuse (3) umfasst, wobei die Öffnungssteuerung (32) das Öffnen des ersten Ventils (5) steuert, wenn die von dieser Temperatursonde (4) gemessene Temperatur den ersten Schwellenwert überschreitet.
  5. Kühlkreislauf nach einem der vorstehenden Ansprüche, der außerdem ein Luftheizgerät (11) umfasst, das geeignet ist, Kühlflüssigkeit, die von dem Ausgangsgehäuse (3) kommt, zu empfangen; ein zweites Ventil (34), das das Abfließen der Kühlflüssigkeit zwischen dem Ausgangsgehäuse (3) und dem Luftheizgerät (11) verschließt; eine Pumpe, die geeignet ist, Kühlflüssigkeit in dem Luftheizgerät zu fördern, wenn der Verbrennungsmotor stillsteht; wobei die Öffnungssteuerung (32) das Öffnen des zweiten Ventils steuert, wenn der Verbrennungsmotor stillsteht.
  6. Kühlkreislauf nach Anspruch 5, der außerdem eine Pumpe (8) umfasst, die Kühlflüssigkeit in dem Motor fördert, wobei ein Ausgang des Luftheizgeräts an diese Pumpe angeschlossen ist; einen Abzweigkreislauf (13), der das Ausgangsgehäuse (3) direkt mit der Pumpe (8) verbindet; ein drittes Ventil (35), das das Abfließen der Kühlflüssigkeit in der Abzweigleitung verschließt, wobei die Steuerung (32) das Öffnen des dritten Ventils selektiv steuert.
  7. Kühlkreislauf nach einem der vorstehenden Ansprüche, der einen Sekundärkühler (21); einen Einlassluft-Kühlaustauscher (31), der geeignet ist, Kühlflüssigkeit, die von dem Motor (2) kommt, zu empfangen und diese Kühlflüssigkeit in das Ausgangsgehäuse (3) zu fördern; eine Pumpe (27), die ein Fließen zwischen dem Einlassluftaustauscher (31) und dem Sekundärkühler (21) in einem Sekundärkreislauf (28, 30) erzeugt, umfasst; wobei das Ausgangsgehäuse (3) mit einem vierten Ventil (33) versehen ist, das das Fließen der Kühlflüssigkeit, die von dem Einlassluftaustauscher (31) kommt, verschließt; wobei die Steuerung (32) intermittierend das Stoppen der Pumpe (22) und das Öffnen des vierten Ventils (33) steuert.
  8. Kühlkreislaufs nach den Ansprüchen 1, 5, 6 und 7, wobei das Ausgangsgehäuse (3) einen gleitenden Aktuator umfasst, dessen Position das Öffnen oder das Schließen des ersten bis vierten Ventils definiert.
EP09155629.0A 2008-04-01 2009-03-19 Kühlmittelkreislauf eines Motors Active EP2112347B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0852133A FR2929330B1 (fr) 2008-04-01 2008-04-01 Circuit de refroidissement moteur.

Publications (2)

Publication Number Publication Date
EP2112347A1 EP2112347A1 (de) 2009-10-28
EP2112347B1 true EP2112347B1 (de) 2019-10-09

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FR (1) FR2929330B1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3002976A1 (fr) * 2013-03-05 2014-09-12 Peugeot Citroen Automobiles Sa Procede de mise en œuvre d'un circuit de refroidissement
FR3036134B1 (fr) * 2015-05-13 2019-04-19 Psa Automobiles Sa. Boitier de sortie de fluide de refroidissement d’un moteur
FR3036135A1 (fr) * 2015-05-13 2016-11-18 Peugeot Citroen Automobiles Sa Circuit de refroidissement d’un moteur
FR3051871B1 (fr) * 2016-05-24 2018-06-15 Peugeot Citroen Automobiles Sa Dispositif de controle d'echanges de calories entre une boite de vitesses manuelle d'un vehicule et un fluide caloporteur
FR3051873B1 (fr) * 2016-05-24 2018-06-15 Peugeot Citroen Automobiles Sa Groupe motopropulseur d’un vehicule
FR3051872B1 (fr) * 2016-05-24 2018-06-15 Peugeot Citroen Automobiles Sa Groupe motopropulseur d'un vehicule
FR3079559A1 (fr) * 2018-03-27 2019-10-04 Psa Automobiles Sa Boitier de sortie d’eau et dispositif de gestion thermique d’un groupe motopropulseur de vehicule
FR3085999B1 (fr) * 2018-09-13 2020-09-04 Psa Automobiles Sa Procede de protection contre l’engazage d’un fluide caloporteur dans un systeme de refroidissement d’un moteur thermique
FR3087488B1 (fr) * 2018-10-23 2020-12-18 Psa Automobiles Sa Procede d’ouverture anticipee d’un thermostat froid dans un systeme de refroidissement d’un moteur
FR3088677B1 (fr) * 2018-11-20 2020-11-13 Psa Automobiles Sa Procede et dispositif de refroidissement d'un moteur a combustion interne

Citations (1)

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Publication number Priority date Publication date Assignee Title
JPS5618018A (en) * 1979-07-19 1981-02-20 Nissan Motor Co Ltd Cooling water temperature controller

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FR2456838A1 (fr) * 1979-05-18 1980-12-12 Sev Marchal Vanne a action thermostatique destinee a un circuit de refroidissement de moteur a combustion interne
DE19641559A1 (de) * 1996-10-09 1998-04-16 Voith Turbo Kg Antriebseinheit mit thermisch geregelter Wasserpumpe
SE521618C2 (sv) * 1998-07-31 2003-11-18 Volvo Lastvagnar Ab Förfarande och anordning för avluftning av ett kylvätskesystem till en förbränningsmotor
DE10139314A1 (de) * 2001-08-09 2003-03-06 Deere & Co Kühlsystem für Kraftfahrzeugantriebe
FR2841187B1 (fr) * 2002-06-21 2004-08-27 Cf Gomma Spa Dispositif et procede de degazage pour vehicule automobiles
FR2903143B1 (fr) * 2006-06-29 2008-09-26 Peugeot Citroen Automobiles Sa Circuit de refroidissement d'un moteur de vehicule automobile comprenant un tube de circulation de liquide pour une sonde de temperature

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5618018A (en) * 1979-07-19 1981-02-20 Nissan Motor Co Ltd Cooling water temperature controller

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Publication number Publication date
EP2112347A1 (de) 2009-10-28
FR2929330A1 (fr) 2009-10-02
FR2929330B1 (fr) 2010-04-09

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