EP2061959B1 - System zur kühlung der antriebseinheit eines kraftfahrzeugs und verfahren zur steuerung eines solchen systems - Google Patents

System zur kühlung der antriebseinheit eines kraftfahrzeugs und verfahren zur steuerung eines solchen systems Download PDF

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Publication number
EP2061959B1
EP2061959B1 EP07823716A EP07823716A EP2061959B1 EP 2061959 B1 EP2061959 B1 EP 2061959B1 EP 07823716 A EP07823716 A EP 07823716A EP 07823716 A EP07823716 A EP 07823716A EP 2061959 B1 EP2061959 B1 EP 2061959B1
Authority
EP
European Patent Office
Prior art keywords
compartment
main
circuit
cooling
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.)
Not-in-force
Application number
EP07823716A
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English (en)
French (fr)
Other versions
EP2061959A1 (de
Inventor
Robert Yu
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
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Renault SAS
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Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP2061959A1 publication Critical patent/EP2061959A1/de
Application granted granted Critical
Publication of EP2061959B1 publication Critical patent/EP2061959B1/de
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Anticipated expiration legal-status Critical

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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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P2005/105—Using two or more pumps

Definitions

  • the invention relates to a cooling system for a motor vehicle powertrain of the type comprising a main circuit and a secondary circuit for cooling parts of the powertrain at different temperature levels.
  • a powertrain comprises for example a heat engine requiring to be maintained at a temperature level of the order of 90 ° C to 105 ° C.
  • This powertrain may include accessories requiring cooling to a lower temperature level, between 30 and 70 ° C, or as low as possible. These accessories include, for example, a charge air cooler, a recycled gas exchanger, an electric motor, its electronic power supply system or batteries.
  • the document FR-A1-2815402 shows a cooling system of this type.
  • the system is used to cool a heat engine to a first temperature level and an electric motor and its control unit to a second temperature level through a secondary circuit.
  • the system has a radiator subdivided into compartments.
  • the secondary circuit is a branch of the main circuit and has one of the compartments, called secondary.
  • the secondary compartment of this system is completely dedicated to the secondary circuit.
  • the main circuit is not connected to the radiator, for example during the cold start phase, it would be interesting to use a larger part of the radiator to lower the temperature of the secondary circuit.
  • the invention relates to a cooling system of a motor vehicle powertrain, comprising a main circuit for cooling a first part of the powertrain to a first temperature level, a secondary circuit for cooling a second part of the power train at a second temperature level, the system comprising a radiator subdivided into at least one main compartment and a secondary compartment, the main circuit comprising the main compartment, the secondary circuit comprising the secondary compartment.
  • the secondary circuit in a secondary mode of operation, comprises the main compartment.
  • the system according to the invention makes it possible to circulate the fluid of the secondary circuit also in the main compartment, which allows a better cooling of the fluid, and therefore operation with a lower temperature than in the prior art.
  • the main compartment has an inlet port, an intermediate connection and a communication port with the secondary compartment, the secondary compartment further comprising an outlet port, the intermediate connection and the communication port being separated by a cooling zone of the main compartment.
  • the fluid flowing in the secondary circuit exits the radiator through the outlet after passing through the communication port and the secondary compartment. But before, it has passed through a cooling zone of the main compartment from the intermediate connection or the inlet port. As a result, its temperature has already dropped since entering the radiator and continues to be lowered through the secondary compartment.
  • the secondary circuit comprises a secondary branch connected to the outlet port and including a secondary pump and a cooling element of the power train.
  • the element to be cooled receives a fluid having passed through a part of the main compartment and the secondary compartment, and therefore at the lowest possible temperature.
  • a common branch is connected to the main circuit, to the intermediate connection and to the secondary branch.
  • the common branch can receive the return fluid of the secondary circuit which enters the main compartment through the intermediate connection, then rejoins the secondary compartment through the main compartment.
  • the main circuit fluid exits the main compartment by the common branch while a part of the fluid flows in the secondary compartment and the secondary branch before joining the flow in the main circuit.
  • the element to be cooled is a recycled gas exchanger
  • the maximum cooling is ensured by the low temperature of the fluid in the secondary circuit.
  • the exhaust gases no longer circulate in the recycled gas exchanger and the fluid in the secondary circuit is not reheated. This fluid is injected into the main circuit and contributes to the cooling of the engine at a time when the power to be evacuated is important. All the compartments of the radiator contribute to the cooling of the engine.
  • the radiator comprises at least one primary compartment upstream of the main compartment. It is thus certain that the fluid that arrives from the main circuit and goes to the secondary circuit via the communication orifice has passed through the cooling zone of the primary compartment.
  • the secondary compartment is a separate element of the main compartment. This allows give more flexibility to integrate the radiator into the vehicle architecture.
  • the invention also relates to a control method of a system as described above. According to this method, the system is controlled in a secondary operating mode in which a fluid from the secondary pump and the element to be cooled circulates in the main compartment and then in the secondary compartment, the radiator being disconnected from the main circuit.
  • the coolant from the main circuit enters the radiator and is subdivided into a flow to the main compartment and a flow to the secondary compartment.
  • a cooling system according to the invention, according to a first embodiment as represented on the Figures 1 to 3 , comprises a thermal motor 1, a radiator 2 and a pump main 3 downstream of the engine.
  • the engine 1 is connected to an inlet port 20 of the radiator via a thermostatic valve 4.
  • the radiator 2 is connected to the main pump 3 from an intermediate connection 21 by way of a branch 9.
  • the main pump 3 is able to circulate a heat transfer fluid through the engine 1, the thermostatic valve 4, the radiator 2 and the common branch 9.
  • the system further comprises, in parallel with the engine 1, a storage vessel. expansion 6 and a heater 5 for heating the passenger compartment.
  • a secondary branch 7 is connected to the radiator 2 at an outlet port 25 and comprises a secondary pump 71 and an element to be cooled 72 such as a recycled gas exchanger.
  • the secondary branch 7 also connects to the common branch 9.
  • the radiator 2 has three compartments: a primary compartment 22 connected to the inlet port 20, followed by a main compartment 23 connected to the intermediate connection 21, and a secondary compartment 24 connected to the outlet port 25 and the compartment
  • the radiator 2 conventionally comprises a first collector 27 and a second collector 28 parallel to each other, in communication with each other by a plurality of parallel channels, perpendicular to the direction of the collectors 27, 28.
  • the channels 29 form cooling zones through which air can circulate to cool the fluid contained in the channels 29.
  • the first collector 27 has a first partition 271 and a second partition 272 separating the first collector 27 in three zones without possible direct circulation of fluid between them. Each zone corresponds respectively to the primary compartment 22, the main compartment 23 and the secondary compartment 24.
  • the thermostatic valve 4 closes the circulation of the fluid.
  • the main pump 3 thus circulates the heat transfer fluid through the engine 1, then in parallel through the expansion vessel 6 and the heater 5 before returning to the main pump 3 by the common branch 9.
  • the secondary pump 71 circulates the heat transfer fluid through the recycled gas exchanger 72, then to the main compartment 23 via the common branch 9 and the intermediate connection 21, and finally to the secondary compartment 24 through the communication port 26.
  • the fluid returns to the secondary pump 71 by the secondary branch 7 through the outlet port 25. This establishes the secondary circuit in the secondary mode of operation.
  • the maximum cooling in the recycled gas exchanger 72 is ensured, which makes it possible to introduce a large quantity of recycled gases into the engine 1, because these have a high density with a temperature of 100.degree. weaker possible.
  • the cooling is ensured by the passage of the fluid through the main compartment 23 and the secondary compartment 24.
  • the thermostatic valve 4 opens the circulation of the fluid.
  • the main pump 3 thus circulates the coolant through the engine 1, then in parallel through the expansion vessel 6, the heater 5 and the radiator 2 before returning to the main pump 3 by the common branch 9.
  • This main mode of operation is implemented when the engine 1 is hot, that is to say when the fluid at the output of the engine 1 has a temperature greater than 90 ° C for example.
  • the secondary pump 71 circulates a part of the heat transfer fluid circulating in the radiator 2 through the secondary compartment 24, then through the recycled gas exchanger 72, before the fluid joins the flow of the circuit fluid in the common branch 9 to the main pump 3. This establishes the secondary circuit in the main operating mode.
  • the fluid flowing in the secondary circuit is first cooled in the primary compartment 22, passes into the second manifold 28 and then into the secondary compartment 24.
  • the radiator 2a may be in two parts, as shown in FIG. figure 4 , where the secondary compartment 24a is a separate element connected to the main compartment 23a through a communication conduit 26a.
  • the communication line 26a plays the same role as the communication port 26.
  • the radiator 2b has no primary compartment 22, unlike the first embodiment.
  • the inlet port 20b is on the second manifold 28b, while the outlet port 25b and the intermediate connection 21b are on the first manifold 27b.
  • the figure 7 represents the secondary mode of operation when the thermostatic valve 4 is closed.
  • the heat transfer fluid from the secondary branch 7 by the common branch 9 to the main compartment 23b then circulates throughout the main compartment 23b, then in the secondary compartment 24b which allows optimum cooling using the entire surface of the radiator 2b.
  • the radiator 2c may be in two parts, as shown in FIG. figure 6 , where the secondary compartment 24c is a separate element connected to the main compartment 23c via a communication conduit 26c.
  • the communication line 26c plays the same role as the communication port 26.

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)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Direct Current Motors (AREA)
  • Motor Or Generator Cooling System (AREA)

Claims (7)

  1. Kühlsystem für eine Antriebseinheit eines Kraftfahrzeugs, das einen Hauptkreislauf zum Kühlen eines ersten Teils der Antriebseinheit auf ein erstes Temperaturniveau und einen Sekundärkreislauf zum Kühlen eines zweiten Teils der Antriebseinheit auf ein zweites Temperaturniveau aufweist, wobei das System einen Kühler (2) aufweist, der in mindestens ein Hauptabteil (23) und ein Sekundärabteil (24) unterteilt ist, wobei der Hauptkreislauf das Hauptabteil (23) enthält, wobei der Sekundärkreislauf das Sekundärabteil (24) enthält, wobei das Hauptabteil (23) eine Eingangsöffnung (20) und eine Öffnung (26) zur Kommunikation mit dem Sekundärabteil (24) aufweist, wobei das Sekundärabteil (24) außerdem eine Ausgangsöffnung (25) aufweist, wobei der Sekundärkreislauf in einem Sekundärbetriebsmodus das Hauptabteil (23) aufweist, dadurch gekennzeichnet, dass das Hauptabteil eine Zwischenverbindung (21) aufweist, wobei die Zwischenverbindung (21) und die Kommunikationsöffnung (26) durch eine Kühlzone des Hauptabteils (23) getrennt sind.
  2. System nach Anspruch 1, bei dem der Sekundärkreislauf einen Sekundärzweig (7) aufweist, der mit der Ausgangsöffnung (25) verbunden ist und eine Sekundärpumpe (71) und ein zu kühlendes Element (72) der Antriebseinheit umfasst.
  3. System nach Anspruch 2, bei dem ein gemeinsamer Zweig (9) mit dem Hauptkreislauf, mit der Zwischenverbindung (21) und mit dem Sekundärzweig (7) verbunden ist.
  4. System nach Anspruch 1, bei dem der Kühler (2) mindestens ein Primärabteil (22) vor dem Hauptabteil (23) aufweist.
  5. System nach Anspruch 1, bei dem das Sekundärabteil (24) ein vom Hauptabteil (23) getrenntes Element ist.
  6. Verfahren zur Steuerung eines Systems nach einem der Ansprüche 1 bis 5, bei dem das System in einem Sekundärbetriebsmodus gesteuert wird, dadurch gekennzeichnet, dass ein vom Sekundärkreislauf stammendes Fluid im Hauptabteil (23) und dann im Sekundärabteil (24) fließt, wobei der Kühler (2) vom Hauptkreislauf getrennt ist.
  7. Steuerverfahren nach Anspruch 6, bei dem gemäß einem Hauptbetriebsmodus die vom Hauptkreislauf stammende Kühlflüssigkeit in den Kühler (2) eintritt und sich in einen Strom zum Hauptabteil (23) und einen Strom zum Sekundärabteil (24) unterteilt.
EP07823716A 2006-09-11 2007-08-16 System zur kühlung der antriebseinheit eines kraftfahrzeugs und verfahren zur steuerung eines solchen systems Not-in-force EP2061959B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0653668A FR2905727B1 (fr) 2006-09-11 2006-09-11 Systeme de refroidissement d'un groupe motopropulseur de vehicule automobile, et procede de commande d'un tel systeme
PCT/FR2007/051815 WO2008031962A1 (fr) 2006-09-11 2007-08-16 Systeme de refroidissement d'un groupe motopropulseur de vehicule automobile, et procede de commande d'un tel systeme

Publications (2)

Publication Number Publication Date
EP2061959A1 EP2061959A1 (de) 2009-05-27
EP2061959B1 true EP2061959B1 (de) 2010-06-02

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ID=38169271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07823716A Not-in-force EP2061959B1 (de) 2006-09-11 2007-08-16 System zur kühlung der antriebseinheit eines kraftfahrzeugs und verfahren zur steuerung eines solchen systems

Country Status (5)

Country Link
EP (1) EP2061959B1 (de)
AT (1) ATE470056T1 (de)
DE (1) DE602007006969D1 (de)
FR (1) FR2905727B1 (de)
WO (1) WO2008031962A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109854356A (zh) * 2019-02-28 2019-06-07 浙江吉利汽车研究院有限公司 散热装置、散热系统及汽车

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3422036B2 (ja) * 1992-07-13 2003-06-30 株式会社デンソー 車両用冷却装置
DE19633190B4 (de) * 1996-08-17 2004-02-26 Daimlerchrysler Ag Kühlsystem für eine Brennkraftmaschine
FR2844224B1 (fr) * 2002-09-06 2004-11-19 Renault Sa Systeme de refroidissement d'une chaine de traction hybride pour vehicule automobile.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109854356A (zh) * 2019-02-28 2019-06-07 浙江吉利汽车研究院有限公司 散热装置、散热系统及汽车
CN109854356B (zh) * 2019-02-28 2020-07-07 浙江吉利汽车研究院有限公司 散热装置、散热系统及汽车

Also Published As

Publication number Publication date
FR2905727A1 (fr) 2008-03-14
WO2008031962A1 (fr) 2008-03-20
FR2905727B1 (fr) 2011-03-25
EP2061959A1 (de) 2009-05-27
DE602007006969D1 (de) 2010-07-15
ATE470056T1 (de) 2010-06-15

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