EP0670414A1 - Kühlungsanlage für eine Brennkraftmaschine - Google Patents

Kühlungsanlage für eine Brennkraftmaschine Download PDF

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Publication number
EP0670414A1
EP0670414A1 EP95400428A EP95400428A EP0670414A1 EP 0670414 A1 EP0670414 A1 EP 0670414A1 EP 95400428 A EP95400428 A EP 95400428A EP 95400428 A EP95400428 A EP 95400428A EP 0670414 A1 EP0670414 A1 EP 0670414A1
Authority
EP
European Patent Office
Prior art keywords
liquid
alternator
circuit
cooling system
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.)
Granted
Application number
EP95400428A
Other languages
English (en)
French (fr)
Other versions
EP0670414B1 (de
Inventor
Anne Tugaye
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
Regie Nationale des Usines Renault
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, Regie Nationale des Usines Renault filed Critical Renault SAS
Publication of EP0670414A1 publication Critical patent/EP0670414A1/de
Application granted granted Critical
Publication of EP0670414B1 publication Critical patent/EP0670414B1/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
    • 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
    • F01P11/029—Expansion reservoirs
    • 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
    • F01P2060/00—Cooling circuits using auxiliaries
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a cooling system for an internal combustion engine fitted to a motor vehicle.
  • the invention relates more particularly to a cooling system adapted to allow the cooling of the alternator driven by the engine.
  • alternators of internal combustion engines are generally fixed on a support mounted on the wall of the engine block so as to allow the drive of the rotor shaft by the crankshaft by means of a simple belt.
  • alternators are made up of electrical components which no longer function perfectly reliably when the ambient temperature becomes too high.
  • the most used method to ensure correct cooling of an alternator consists of adding one or more internal or external fans integral with the rotor shaft.
  • this method does not always allow sufficient cooling, in particular for motor vehicle alternators, the performance of which is higher and higher in an increasingly smaller footprint.
  • the alternator cooling system is connected to the coolant inlet manifold of the engine block.
  • the integration of the alternator in the cooling system at the pump outlet and in parallel with the engine block makes balancing the flow rates difficult and does not ensure a sufficient flow of coolant through the alternator and therefore ensure satisfactory cooling of the latter.
  • the object of the present invention is to further improve the efficiency of a liquid cooling system for an internal combustion engine of a motor vehicle enabling the alternator to be cooled in a simple manner.
  • the liquid cooling system for an internal combustion engine fitted to a motor vehicle comprises an internal circuit passing through the engine block, a main heat exchanger of the liquid / air type and a pump driving the liquid.
  • the cooling system is characterized in that it comprises a derivative cooling circuit serving an alternator driven by the engine by which the coolant introduced into the alternator is taken out of the internal circuit of the engine block and is driven back to the input of said internal circuit.
  • the derived cooling circuit comprises a secondary liquid / air exchanger disposed upstream of the alternator.
  • the circulation inside the derived cooling circuit is controlled by a thermostat.
  • the derivative cooling circuit of the alternator is connected on the one hand, upstream in the direction of the flow of the coolant, to the pipe which connects the outlet of the internal circuit of the engine block at the inlet of the main heat exchanger, and on the other hand downstream, to the pipe which connects the outlet of the main heat exchanger to the inlet of the internal circuit of the block engine.
  • the structural characteristics of the main heat exchanger and of the secondary exchanger are adapted as a function of the respective flow rates of coolant which pass through them.
  • the main heat exchanger and the secondary exchanger are arranged in two separate places in the engine compartment.
  • FIG. 1 therefore shows a cooling system, identified by the reference 1 in the drawing, by liquid (generally water added with an antifreeze and an anti-corrosion product) more particularly intended for the cooling of a combustion engine internal 2, for example of the multicylinder type fitted to a motor vehicle. Only the elements necessary for understanding the invention have been shown.
  • liquid generally water added with an antifreeze and an anti-corrosion product
  • the liquid cooling system presented conventionally comprises an internal circuit 12 (also called water chambers) passing through the engine block 2 to cool the combustion chambers.
  • the coolant is cooled by an air sweep in a radiator constituted by a main liquid / air heat exchanger 4.
  • the liquid is driven by a pump 3 placed immediately upstream of the internal circuit 12 of the engine 2.
  • the pipe 10 connecting the output of the internal circuit 12 to the main exchanger 4 includes a thermostat 5 which defines a bypass connection 13 serving an air heater 6 for heating the home and an expansion tank 7.
  • a pipe 11 ensures the return of the liquid from the main exchanger 4 to the inlet of the internal circuit 12.
  • the cooling system includes plus a derivative cooling circuit 14 comprising a secondary liquid / air exchanger 8 and the alternator 9.
  • the cooling liquid introduced into the alternator is taken at the outlet of the internal circuit 12 of the engine 2 and is turned back at the entrance of the latter.
  • the cooling circuit 14 of the alternator 9 is connected on the one hand, upstream in the direction of the flow of the coolant, to the pipe 10 which connects the outlet of the internal circuit 12 of the engine block 2 at the inlet of the main heat exchanger 4, the connection being able to be made before (cf. FIG. 1) or after the thermostat 5, and on the other hand downstream, to the pipe 11 which connects the outlet of the main heat exchanger 4 at the input of the internal circuit 12 of the engine block 2.
  • connection of the branch circuit 14 intended for cooling the alternator 9, at the outlet of the internal circuit 12 of the engine 2 makes it possible to significantly increase the flow of liquid through the alternator 9 whatever the operating point of the engine. , and therefore to improve the elimination of calories in comparison with known systems in which the derived circuit is supplied upstream of the internal circuit 12 of the motor 2.
  • the higher temperature of the liquid leaving the motor 2 is largely attenuated by the secondary temperature exchanger 8 disposed upstream of the alternator 9.
  • the amount of additional heat transmitted to the coolant by the alternator 9 requires increasing the power which can be removed by the main exchanger 4.
  • the solution adopted in accordance with the present invention d '' using a secondary exchanger 8 disposed in the branch circuit in which only a part of the overall flow circulates makes it possible to reduce the necessary exchange surfaces, moreover this secondary exchanger can be geographically dissociated from the main exchanger, which allows optimize the installation of the cooling system in the engine compartment of the motor vehicle.
  • the separation of the heat exchangers 4 and 8 also makes it possible to use for each of them technical solutions offering different heat exchange characteristics (shapes of the fins, of the bundles, etc.).

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)
  • Motor Or Generator Cooling System (AREA)
EP19950400428 1994-03-01 1995-02-28 Kühlungsanlage für eine Brennkraftmaschine Expired - Lifetime EP0670414B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9402314 1994-03-01
FR9402314A FR2716932B1 (fr) 1994-03-01 1994-03-01 Système de refroidissement pour un moteur à combustion interne de véhicule automobile.

Publications (2)

Publication Number Publication Date
EP0670414A1 true EP0670414A1 (de) 1995-09-06
EP0670414B1 EP0670414B1 (de) 1998-05-20

Family

ID=9460529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950400428 Expired - Lifetime EP0670414B1 (de) 1994-03-01 1995-02-28 Kühlungsanlage für eine Brennkraftmaschine

Country Status (3)

Country Link
EP (1) EP0670414B1 (de)
DE (1) DE69502520T2 (de)
FR (1) FR2716932B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2744398A1 (fr) * 1996-02-06 1997-08-08 Valeo Equip Electr Moteur Vehicule automobile muni d'un alternateur a refroidissement liquide
EP0835989A1 (de) * 1996-09-13 1998-04-15 SMH Management Services AG Fahrzeug mit Kühlanordnung für einen Verbrennungsmotor
GB2322411A (en) * 1997-02-20 1998-08-26 Bosch Gmbh Robert I.c. engine fuel-injection valve with additional supply line eg for water
GB2475079A (en) * 2009-11-05 2011-05-11 Ford Global Tech Llc Vehicle engine cooling system comprising three branches

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2188172A (en) * 1937-01-06 1940-01-23 Gen Electric Heat transfer system
DE3044422A1 (de) * 1980-11-26 1982-06-03 Audi Nsu Auto Union Ag, 7107 Neckarsulm Kraftfahrzeug mit einer brennkraftmaschine
JPS5875464A (ja) * 1981-10-28 1983-05-07 Hino Motors Ltd リタ−ダの冷却装置
US4864974A (en) * 1987-03-23 1989-09-12 Mitsubishi Denki Kabushiki Kaisha Cooling apparatus for a starter motor and/or a generator for a car

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2188172A (en) * 1937-01-06 1940-01-23 Gen Electric Heat transfer system
DE3044422A1 (de) * 1980-11-26 1982-06-03 Audi Nsu Auto Union Ag, 7107 Neckarsulm Kraftfahrzeug mit einer brennkraftmaschine
JPS5875464A (ja) * 1981-10-28 1983-05-07 Hino Motors Ltd リタ−ダの冷却装置
US4864974A (en) * 1987-03-23 1989-09-12 Mitsubishi Denki Kabushiki Kaisha Cooling apparatus for a starter motor and/or a generator for a car

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 7, no. 170 (E - 189) 27 July 1983 (1983-07-27) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2744398A1 (fr) * 1996-02-06 1997-08-08 Valeo Equip Electr Moteur Vehicule automobile muni d'un alternateur a refroidissement liquide
EP0835989A1 (de) * 1996-09-13 1998-04-15 SMH Management Services AG Fahrzeug mit Kühlanordnung für einen Verbrennungsmotor
GB2322411A (en) * 1997-02-20 1998-08-26 Bosch Gmbh Robert I.c. engine fuel-injection valve with additional supply line eg for water
GB2322411B (en) * 1997-02-20 1999-03-17 Bosch Gmbh Robert Fuel-injection valve for internal combustion engines
GB2475079A (en) * 2009-11-05 2011-05-11 Ford Global Tech Llc Vehicle engine cooling system comprising three branches
US8291870B2 (en) 2009-11-05 2012-10-23 Ford Global Technologies, Llc Cooling systems
US8408165B2 (en) 2009-11-05 2013-04-02 Ford Global Technologies, Llc Cooling systems
GB2475079B (en) * 2009-11-05 2015-02-18 Ford Global Tech Llc Cooling systems

Also Published As

Publication number Publication date
EP0670414B1 (de) 1998-05-20
FR2716932B1 (fr) 1996-03-29
DE69502520T2 (de) 1999-01-28
FR2716932A1 (fr) 1995-09-08
DE69502520D1 (de) 1998-06-25

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