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
• • 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
  • F01P5/12—Pump-driving arrangements
  • F01P2005/125—Driving auxiliary pumps electrically
• • 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
  • F01P2050/02—Marine engines
  • F01P2050/06—Marine engines using liquid-to-liquid 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
  • 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
• • 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
  • F01P2060/08—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
  • F01P2060/14—Condenser
• • 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
  • F01P2060/16—Outlet manifold

Definitions

• the invention relates to a system for cooling a powertrain, in particular a motor vehicle, comprising a motor, in particular a thermal engine, cooled by a circulation of a cooling fluid and a cooling radiator cooled by a circulation of external atmospheric air. .
• Engines, thermal or otherwise, of motor vehicles are usually cooled by means of a cooling radiator placed at the front of the vehicle and cooled by a flow of fresh air passing through it.
• a cooling circuit makes it possible to circulate a heat transfer fluid between the engine and the cooling radiator to cool the engine.
• motor vehicles include numerous items of equipment which exchange thermal energy with their external environment. These equipments are, for example, the condenser of the air conditioning circuit of the passenger compartment of the motor vehicle, a radiator and charge air, a cooling radiator 'of the engine oil and / or the gearbox, or another fuel cooling radiator.
• the air conditioning circuit of the passenger compartment of the motor vehicle comprises a heat exchanger, constituting a condenser, disposed at the front of the vehicle, in front of the heat engine cooling radiator.
• a specific refrigerant, distinct from the heat transfer fluid of the heat engine, runs through the air conditioner.
• Special lines are required to connect the condenser to the evaporator which is located in the housing of the air conditioning and heating unit of the passenger compartment of the vehicle.
• the air cooling is carried out in an air-air exchanger which is " disposed .a 1- " before the vehicle and " which is cooled by atmospheric air circulation.
• each exchanger is dimensioned so as to provide sufficient cooling for its own critical point which does not necessarily correspond to the critical operating conditions of the other exchangers.
• the condenser of the air conditioning circuit and the charge air radiator do not necessarily operate at full speed at the same times.
• the exchangers penalize each other by reducing the flow rate or the speed of the air available to the other radiators.
• the air conditioning system condenser placed in front of the engine cooling radiator, slows the air flow, even when the air conditioning system is not in operation.
• the subject of the present invention is a system for cooling a powertrain as mentioned above which overcomes these drawbacks.
• the motor is part of a primary loop and in that the cooling radiator is part of a secondary loop, said primary and secondary loops being able to allow independent circulation of a first and a second cooling fluid, of the same kind, the primary loop and the secondary loop being in relation heat exchange with each other via an intermediate heat exchanger crossed by both the cooling fluid of the primary loop and the fluid "of" cooling the secondary loop.
• the cooling system uses a unique cooling exchanger exchanging with atmospheric air. Consequently, this radiator can be dimensioned widely and it is not penalized by the presence in front of or behind it of a certain number of secondary radiators of smaller dimension, like the condenser of the air conditioning circuit, the air radiator of boost, oil cooler, etc.
• the vehicle equipment which must be cooled is not cooled, as in the prior art, by means of specific exchangers exchanging heat directly with the outside atmospheric air, but by an exchanger connected to the secondary loop and cooled by circulation of the coolant.
• said intermediate exchanger the heat exchange between the first and the second fluid takes place, advantageously, directly, that is to say, without involving a third fluid. Said intermediate exchanger is thus crossed only by the coolant of the loop primary- and by the cooling fluid of the "secondary loop.
• the cooling system includes an air heater branch mounted in parallel between the : " outlet " of the coolant and the inlet of the coolant into the engine;
• an exhaust gas cooling exchanger is mounted on the heater branch
• the cooling system comprises an oil radiator branch on which is mounted a radiator for cooling the engine oil and / or the gearbox;
• the cooling system includes an oil radiator for cooling the engine oil and / or the gearbox integrated in the intermediate radiator;
• the primary loop and the secondary loop each have an expansion vessel branch connected to a common expansion vessel;
• the secondary loop includes a charge air radiator;
• the secondary loop comprises a condenser forming part of an air conditioning circuit for the passenger compartment of the vehicle;
• valve comprises a four-way distribution valve, the valve comprising an outlet channel connected to the condenser, an outlet channel connected to the charge air radiator and a channel connected to a short-circuit pipe;
• thermostatic box integrated into the intermediate exchanger.
• Figure 1 illustrates a first alternative embodiment of a cooling system according to the present invention.
• FIG. 2 illustrates a second variant of a cooling system according to the invention.
• FIG. 1 An overview of a cooling system of a vehicle heat engine 10 according to the invention.
• This cooling system consists of a primary loop designated by the general reference 2 and a secondary loop designated by the general reference 4.
• the primary loop includes the engine 10 of the vehicle and a water pump 12, generally a pump mechanical, which circulates a coolant through the engine block to evacuate excess calories.
• a thermostatic box 14 At the engine outlet, there is a thermostatic box 14.
• the secondary loop 4 comprises a cooling radiator 18 crossed by an external air flow and located at the front of the vehicle.
• the secondary loop further comprises a number of exchangers intended to cool, possibly to heat, various pieces of equipment of the motor vehicle.
• the cooling system comprises a charge air radiator 22 and a condenser 24.
• the charge air radiator 22 is intended to cool the air prior to its admission into the combustion chambers of the engine. .
• the condenser 24 is part of the air conditioning circuit of the passenger compartment of the vehicle.
• a water pump 20, generally an electric pump, circulates the cooling fluid in the secondary loop 4.
• the same fluid circulates in the primary loop 2 and the secondary loop 4.
• the primary loop and the secondary loop are in heat exchange relationship with each other by an intermediate heat exchanger 26 disposed between them.
• the engine coolant after passing through the thermostatic housing 14, is conveyed by a pipe 30 to the intermediate exchanger 26. It leaves the exchanger by a pipe 32 which brings it back to the pump 12 and to the block motor 10.
• the coolant which leaves the charge air cooler 22 and the condenser 24 is led by a pipe 34 in the intermediate exchanger 26.
• the coolant cools the coolant the primary loop.
• the coolant of the secondary loop leaves the intermediate exchanger by a pipe 36 which brings it back to the water pump 20, then, by a pipe 38, to the cooling radiator 18 in which it is again cooled.
• the engine 10 is not cooled directly by heat exchange with the ambient atmospheric air, as is usually done, but by a liquid / liquid heat exchange in the intermediate exchanger 26.
• the cooling radiator 18 is the only radiator of the cooling system of the invention.
• the exchangers 22 and 24 are respectively air-water and freon-water exchangers which are cooled by the cooling fluid which circulates in the secondary loop.
• the radiator 18 is used both for cooling the engine block 10, the charge air radiator 22 and the condenser 24.
• the cooling system of the invention comprises an air heater pipe 40 on which is mounted an air heater 42 used for heating the passenger compartment of the vehicle.
• Line 40 is mounted parallel to the engine block.
• the housing thermostatic .14 "fact" a l circ cooling coming out of the engine block 10 by the air heater pipe 40.
• a radiator 44 for cooling the exhaust gases can advantageously be mounted on the air heater pipe 40.
• the system of the invention shown in Figure 1 further comprises an oil radiator line 46 on which an oil radiator 48 is mounted.
• the line 46 is connected to the thermostatic housing 14.
• the oil radiator is used for cool the gearbox or engine oil, or both.
• the oil radiator 48 can be integrated into the intermediate exchanger 26. In this case, the line 46 of the oil radiator is eliminated.
• the exchanger 26 is then a multi-fluid and multi-temperature exchanger. In the same way, it is possible to move the thermal regulation system, in other words the thermostatic box 14, on the intermediate exchanger 26.
• the cooling system comprises a bypass line 52 connected to the thermostatic box 14 and which passes through an expansion tank 54. After passing through the expansion tank, the cooling fluid returns to the water pump 12 without having been cooled.
• This bypass or short-circuit pipe also called bypass, is used at low temperature to promote the engine temperature rise.
• the secondary loop 4 also includes a pipe 56 connected to the inlet of the radiator 18 and at the outlet of the intermediate exchanger 26, which passes through the expansion vessel 54, which is thus an expansion vessel common to the primary loop 2 and to the secondary loop 4.
• the two loops do not are not isolated from each other and can communicate with each other via the expansion tank 54.
• FIG. 2 There is shown in the " Figure" 2 ". ⁇ nè cooling system embodiment of Figure 1.
• the same reference numerals designate the same elements of the primary loop 2 and of the secondary loop.
• the cooling system of FIG. 2 is distinguished by the fact that it comprises a four-way distribution valve 60 situated at the outlet of the radiator 18.
• the distribution valve 60 has an inlet channel through which the cold cooling fluid leaving the radiator 18 enters, and three outlets designated respectively by the references 60-1, 60-2 and 60-3.
• Track 60-1 is connected to the condenser 24, track 60-2 is connected to the charge air radiator 22 and track 60-3 is connected to a short-circuit pipe 62 which is not on the Figure 1.
• the short-circuit pipe 62 allows the cooling fluid of the secondary loop to avoid the exchangers 22 and 24 when this is not necessary. For example, at low engine power, there is no need to cool the air entering the engine chambers. Also, when the outside temperature is low, the cabin air conditioning system is not used. Thus, the entire cooling capacity of the radiator 18 is available for other functions, in particular for cooling the engine 10 of the vehicle.

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=32088390

Family Applications (1)

Country Status (5)

Cited By (2)

Families Citing this family (2)

Citations (7)

• 2002
  • 2002-10-29 FR FR0213539A patent/FR2846368B1/fr not_active Expired - Fee Related
• 2003
  • 2003-10-28 WO PCT/FR2003/003195 patent/WO2004040105A1/fr not_active Application Discontinuation
  • 2003-10-28 EP EP03782509A patent/EP1556588B1/de not_active Expired - Lifetime
  • 2003-10-28 AT AT03782509T patent/ATE542034T1/de active
  • 2003-10-28 AU AU2003290146A patent/AU2003290146A1/en not_active Abandoned

Patent Citations (7)

Non-Patent Citations (1)

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