EP1892398A1 - Vorrichtung zum steuern eines Kühlflüssigkeitskreislaufs sowie des Schmierölkreislaufs einer Fahrzeugwärmekraftmaschine - Google Patents

Vorrichtung zum steuern eines Kühlflüssigkeitskreislaufs sowie des Schmierölkreislaufs einer Fahrzeugwärmekraftmaschine Download PDF

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Publication number
EP1892398A1
EP1892398A1 EP07111593A EP07111593A EP1892398A1 EP 1892398 A1 EP1892398 A1 EP 1892398A1 EP 07111593 A EP07111593 A EP 07111593A EP 07111593 A EP07111593 A EP 07111593A EP 1892398 A1 EP1892398 A1 EP 1892398A1
Authority
EP
European Patent Office
Prior art keywords
coolant
temperature
oil
liquid
circulation
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.)
Withdrawn
Application number
EP07111593A
Other languages
English (en)
French (fr)
Inventor
Christian Noiret
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
Original Assignee
Peugeot Citroen Automobiles SA
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 Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP1892398A1 publication Critical patent/EP1892398A1/de
Withdrawn legal-status Critical Current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
    • 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
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/005—Controlling temperature of lubricant
    • 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
    • F01P2037/00—Controlling
    • F01P2037/02—Controlling starting
    • 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
    • F01P2060/08—Cabin heater

Definitions

  • the present invention relates to a device for controlling a coolant circulation circuit and a lubricating oil circulation circuit of a vehicle engine, such as a motor vehicle.
  • the reduction of pollutant emissions, in particular NOx emitted by a diesel engine can be achieved by lowering the temperature of the engine.
  • FIG. 1 represents a cooling circuit of a motor vehicle heat engine 1 traversed by a cooling liquid, such as water, under the action of a circulation pump 2 operating in a closed circuit.
  • This circuit is fed via a calorstat or thermostat 3 with a two-way valve 3a, a liquid inlet 4 of which is connected to an inlet of cooling liquid coming from the cylinder head of the engine 1 via a pipe 5.
  • the latter communicates via conduits 6, 7, 8, respectively with a heater 9 for heating the passenger compartment of the vehicle, a cooling radiator 10 of the engine 1 via the thermostat 3 and a liquid / oil exchanger 11 for cooling the pressurized lubricating oil circulating in the engine 1 via an oil pump 12.
  • the heater 9 and the exchanger 11 are permanently traversed by the coolant while the radiator 10 is traversed by this liquid when the thermostat opens at a predetermined temperature as will be seen below.
  • the heat engine 1 is provided with an exhaust gas turbocharger shown schematically at 13 and whose turbine 14, having its axis rotatably mounted in the body 15 of the turbocharger 13, is driven by the exhaust gas of the engine 1 so that the air entering the turbocharger 13 as symbolized by the arrow F1 is compressed and supplied to the engine, the arrow F2 symbolizing the exhaust gas after passing through the turbocharger, the compressed air outlet to the inlet of the motor 1 not shown.
  • the turbocharger 13 is supplied with pressurized lubricating oil from the heat engine 1 as indicated in AL, this oil passing through the body 15 of the turbocharger 13 to lubricate the bearings of the axis or shaft of the turbine 14 and being removed from the turbocharger as indicated in S.
  • the lubricating oil outlet of the exchanger 11 is connected in particular to the supply inlet AL of the turbocompressor 13.
  • the thermostat 3 opens to provide a flow of coolant to the radiator 10.
  • Such a known thermal engine cooling circuit does not make it possible to reduce both the fuel consumption during cold running of the engine in order to rapidly reduce the mechanical friction losses of the various parts of the engine and the pollutant emissions of the engine by lowering the engine. the coolant temperature of it.
  • the present invention aims to solve the above problem of known cooling circuits of thermal engines.
  • the device for controlling a cooling circuit of a vehicle engine, such as a motor vehicle, traversed by a cooling liquid, such as water, under the a circulating pump action which circuit comprises a thermostatic valve assembly receiving coolant from the engine, a cooling radiator of the engine that can be traversed by the coolant when the thermostatic valve assembly is open, and a liquid / oil exchanger which can be traversed by the coolant for cooling lubricating oil of the engine circulating in the exchanger under the action of a circulation pump, is characterized in that the thermostatic valve assembly is also connected to the liquid / oil exchanger and is controlled according to the temperature of the coolant at its inlet so as to occupy a first position of cooling fluid circulation to the cooling radiator and the liquid / oil exchanger at a lower coolant temperature value at a first set point temperature of about 40 ° C, a second position of switching off the cooling liquid to the liquid / oil exchanger and circulating the coolant through the cooling radiator to a temperature value of
  • a bypass circuit controlled by a control solenoid valve is connected parallel to the pressurized oil inlet and outlet passages, the solenoid valve being controlled at its open position, when the coolant temperature is lower than the second temperature set point, to allow the circulation of oil in the bypass circuit to increase the flow rate of oil passing through the turbocharger as the oil pressure therethrough and heated by the exhaust gas is higher at a predetermined pressure level which corresponds to a normal operating oil pressure of the hot engine.
  • the turbocharger outlet passage is connected to the inlet of the engine lubricating oil circulation pump.
  • the thermostatic valve assembly comprises two thermostats, one of which makes it possible to put the coolant inlet of this thermostat into communication with the cooling radiator when the temperature of the coolant is equal to or greater than the temperature of the coolant.
  • first setpoint temperature and the other allows to communicate this input with the liquid / oil exchanger when the coolant temperature is equal to or greater than the second setpoint temperature.
  • the common inlet of the cooling liquid to the two thermostats is connected by a pipe to the heater for heating the passenger compartment of the vehicle.
  • the shaft 16 of the turbine of the turbocharger 13 is rotatably mounted in the body 15 thereof by at least two axially spaced bearings of which only one is shown.
  • the pressurized lubricating oil from the engine enters the turbocharger 13 through a bore 18 formed in the body 15 and opening into the space between bearing 17 and shaft 16 to provide lubrication thereof.
  • the lubricating oil passes through the body 15 to be evacuated through the outlet bore 19 of the body 15 as symbolized in S. This outlet bore 19 is connected via a conduit 20 to the inlet of the pump with oil 12.
  • a controlled flow bypass circuit 21 connected parallel to the inlet bores 18 and the outlet bores 19 of the pressurized oil, so as to increase the flow rate of oil passing through the turbocharger 13 as the pressure of the oil therethrough and heated by the exhaust gas is greater than a predetermined pressure level which corresponds to a normal operating oil pressure of the hot engine.
  • the bypass circuit 21 comprises a control solenoid valve 22 controlled at its opening position of the circuit 21 to allow the circulation of oil in this circuit as long as the oil pressure value is greater than that of normal operation of the engine. hot.
  • the solenoid valve 22 makes it possible to control the parallel oil flow as close as possible to the normal operating pressure of this engine and, consequently, to increase the bypass flow rate.
  • the solenoid valve 22 can therefore be controlled so that the oil flow can be derived until the temperature or normal operating pressure of the engine is reached to accelerate the warming of the engine lubricating oil.
  • the bypass circuit 21 with solenoid valve 22 can be integrated into the turbocharger or simply attached thereto without modifying the circulation of the various turbocharger fluids comprising oil, air and exhaust gases compared with existing turbochargers. .
  • the coolant circuit of the heat engine 1 is equipped with two thermostatic valves 23, 24 or calorstats, each of the two-way type, known per se and can be opened depending on the rise in temperature d coolant inlet.
  • the thermostatic valve 23 makes it possible to put the inlet 4 of the cooling liquid coming from the engine cylinder head into communication with the cooling radiator 10 while the thermostatic valve 24 makes it possible to put this input into communication with the liquid / oil exchanger 11 .
  • the thermostatic valve 23 for regulating the flow rate of the coolant to the radiator 10 corresponds to that of the prior art, but its opening, instead of usually occurring at a coolant temperature of about 80 ° C, is performed from a lower coolant temperature of about 40 ° C.
  • the two thermostatic valves 23, 24 are closed so that the cooling liquid circulates only through the heater 9. so as to raise the temperature of the engine to heat the vehicle cabin, the solenoid valve 22 is opened to circulate an additional oil flow through the turbocharger 13 to accelerate the rise in temperature lubricating oil.
  • the thermostatic valve 24 is closed, no flow of the coolant flows through the liquid / oil exchanger 11 so as not to cool the lubricating oil flowing in closed circuit in the engine under the action of the oil pump 12.
  • FIG. 3 represents the situation in which the coolant temperature is between the first setpoint temperature of about 40.degree. C. and a second setpoint temperature of about 80.degree.
  • the thermostatic valve 23 is open from the first setpoint temperature and ensures a flow of coolant through the radiator 10 in order to maintain the coolant temperature at a low level.
  • the thermostatic valve 24 remains closed so that no flow of the coolant flows through the liquid / oil exchanger 11 to ensure the temperature rise of the lubricating oil and, of course, the coolant circulates closed circuit through the heater by the action of the water pump 2.
  • the solenoid valve 22 remains open so that an additional oil flow through the turbocharger 13, oil flow is maintained up to to satisfy the engine oil pressure as previously explained in connection with the operation of the bypass circuit 21 valve 22 of Figure 5, so that the warming of the oil is improved.
  • Fig. 4 shows the situation in which the temperature of the coolant is higher than the second set temperature of about 80 ° C. Under these conditions, the thermostatic valve 23 remains open and the other thermostatic valve 24 opens to allow the circulation of the cooling liquid through the exchanger 11 to ensure cooling of the lubricating oil passing through it and the solenoid valve 22 of the bypass circuit 21 is closed. Of course, the coolant continues to circulate through the heater 9.
  • the invention thus makes it possible to thermally manage the coolant circulation circuits and the lubricating oil of a heat engine by accelerating the temperature rise of the lubricating oil while maintaining the temperature of the coolant at a low level remaining compatible with the comfort in the cabin of the vehicle.
  • the invention makes it possible to maintain a fairly significant difference in temperatures between the coolant and the lubricating oil when the requested power to the motor is relatively low.
  • Such a gap makes it possible to reduce the emission of pollutants, in particular NOx emissions, while reducing the consumption of the engine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP07111593A 2006-08-09 2007-07-03 Vorrichtung zum steuern eines Kühlflüssigkeitskreislaufs sowie des Schmierölkreislaufs einer Fahrzeugwärmekraftmaschine Withdrawn EP1892398A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0653336A FR2904856B1 (fr) 2006-08-09 2006-08-09 Dispositif permettant de commander un circuit de circulation d'un liquide de refroidissement ainsi qu'un circuit de circulation d'huile de lubrification d'un moteur thermique de vehicule

Publications (1)

Publication Number Publication Date
EP1892398A1 true EP1892398A1 (de) 2008-02-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07111593A Withdrawn EP1892398A1 (de) 2006-08-09 2007-07-03 Vorrichtung zum steuern eines Kühlflüssigkeitskreislaufs sowie des Schmierölkreislaufs einer Fahrzeugwärmekraftmaschine

Country Status (2)

Country Link
EP (1) EP1892398A1 (de)
FR (1) FR2904856B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014018729A1 (de) 2014-12-16 2015-06-25 Daimler Ag Kühleinrichtung zum Kühlen einer Verbrennungskraftmaschine
US9279360B2 (en) 2013-05-23 2016-03-08 Yamaha Hatsudoki Kabushiki Kaisha Cooling apparatus for internal combustion engine and motorcycle including the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57124029A (en) * 1981-01-23 1982-08-02 Hitachi Ltd Lubricating oil controller for exhaust gas turbo-supercharger
FR2776707A1 (fr) * 1998-03-31 1999-10-01 Peugeot Systeme de gestion des echanges thermiques dans un vehicule automobile
US20020050251A1 (en) 2000-09-18 2002-05-02 Eizo Takahashi Cooling apparatus for liquid-cooled internal combustion engine
WO2004022941A1 (en) * 2002-09-04 2004-03-18 Ford Global Technologies, Llc Engine cooling systems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57124029A (en) * 1981-01-23 1982-08-02 Hitachi Ltd Lubricating oil controller for exhaust gas turbo-supercharger
FR2776707A1 (fr) * 1998-03-31 1999-10-01 Peugeot Systeme de gestion des echanges thermiques dans un vehicule automobile
US20020050251A1 (en) 2000-09-18 2002-05-02 Eizo Takahashi Cooling apparatus for liquid-cooled internal combustion engine
WO2004022941A1 (en) * 2002-09-04 2004-03-18 Ford Global Technologies, Llc Engine cooling systems

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9279360B2 (en) 2013-05-23 2016-03-08 Yamaha Hatsudoki Kabushiki Kaisha Cooling apparatus for internal combustion engine and motorcycle including the same
EP2806134B1 (de) * 2013-05-23 2018-01-31 Yamaha Hatsudoki Kabushiki Kaisha Kühlvorrichtung für Verbrennungsmotor und Motorrad damit
DE102014018729A1 (de) 2014-12-16 2015-06-25 Daimler Ag Kühleinrichtung zum Kühlen einer Verbrennungskraftmaschine

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Publication number Publication date
FR2904856A1 (fr) 2008-02-15
FR2904856B1 (fr) 2008-11-14

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