EP2090763A1 - Kühlmittelkreislauf eines Motors - Google Patents

Kühlmittelkreislauf eines Motors Download PDF

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Publication number
EP2090763A1
EP2090763A1 EP09152220A EP09152220A EP2090763A1 EP 2090763 A1 EP2090763 A1 EP 2090763A1 EP 09152220 A EP09152220 A EP 09152220A EP 09152220 A EP09152220 A EP 09152220A EP 2090763 A1 EP2090763 A1 EP 2090763A1
Authority
EP
European Patent Office
Prior art keywords
cooling circuit
pipe
housing
flow
circuit according
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
EP09152220A
Other languages
English (en)
French (fr)
Other versions
EP2090763B1 (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
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 EP2090763A1 publication Critical patent/EP2090763A1/de
Application granted granted Critical
Publication of EP2090763B1 publication Critical patent/EP2090763B1/de
Expired - Fee Related legal-status Critical Current
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
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/14—Indicating devices; Other safety devices
    • F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
    • 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
    • F01P2031/00—Fail safe
    • F01P2031/16—Fail safe using melting materials

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.
  • the circulation of water 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 is used to directly send the heated water from the engine to the upstream portion of the cooling circuit positioned before said motor, through the housing.
  • 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 cooling circuit has been cut.
  • Such a cooling circuit has drawbacks.
  • the water temperature measured by the thermostat is not very representative of the engine water temperature. Therefore, when the engine overheats, the thermostat will not necessarily open or too late to allow water to reach the radiator and participate in cooling the engine.
  • this circuit requires an additional bypass line between the water outlet housing and the pump to provide reliable temperature measurement at the probe.
  • the invention aims to solve one or more of these disadvantages.
  • the invention thus relates to a cooling circuit of an internal combustion engine of a motor vehicle, comprising a coolant outlet housing adapted to receive coolant from the engine; a pipe permanently conveying coolant from the outlet box to the engine; a cooling radiator adapted to receive coolant from the outlet housing; a temperature probe placed in the housing; a thermostatic valve closing the flow of coolant between the outlet box and the radiator; a deflector disposed in the housing and guiding a flow of coolant to the pipe, the temperature sensor and the thermostatic valve being disposed in this flow.
  • the thermostatic valve is disposed close to the temperature probe.
  • the thermostatic valve comprises a fuse membrane, the melting of this membrane releasing the flow between the housing and the radiator.
  • the thermostatic valve comprises a member whose thermal expansion displaces a seal and releases the flow between the outlet box and the radiator beyond a predefined temperature.
  • the body is made of wax.
  • said pipe has an inlet of which a portion is free of closure, the portion to which the baffle guides the flow.
  • the circuit comprises a device connected in the pipe between the output box and the motor, and comprises a shutter adapted to selectively close the inlet of the pipe except for said portion.
  • said device is a heater.
  • the shutter is slidably mounted in the housing between an open position of the inlet of the pipe and a closed position of the inlet of the pipe except for said portion.
  • the circuit comprises a pump for circulating the coolant in the circuit and connected between the output housing and the motor.
  • the deflector is disposed vis-à-vis the temperature sensor and the thermostatic valve.
  • the invention proposes a cooling circuit provided with an outlet box and a pipe permanently conveying coolant from the outlet box to the engine.
  • a deflector disposed in the housing guides a flow of coolant to the pipe, a thermostatic valve closing the connection to the radiator and a temperature sensor being disposed in this flow.
  • the temperature probe and the thermostatic valve will be subjected to a temperature representative of the engine temperature.
  • the engine control will have a more reliable temperature measurement and the risk of overheating of the engine will be reduced due to an opening of the valve when the coolant reaches its target temperature.
  • 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 closes the flow of liquid between the outlet housing 3 and a radiator 7 below a predetermined 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 returns the radiator cooling liquid 7 to a pump 8.
  • the pump 8 delivers the cooling liquid into the engine pipes 2. After passing through these pipes, the coolant is received in the outlet housing 3. Part of the coolant discharged into these pipes passes through a water / oil radiator 20.
  • a conduit 19 discharges the coolant from the radiator water / 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 duct 13 connecting the outlet housing 3 to the duct 9 via a proportional solenoid valve 14.
  • This secondary duct 13 makes it possible to directly send heated water from the engine 2 to the pump 8, so 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 engine 2 startup phases to accelerate its rate of warming.
  • a pipe permanently conveys liquid from the outlet housing 3 to the engine 2.
  • the figure 2 is a schematic sectional view of the outlet housing 3.
  • the secondary pipe 10 is used to convey the liquid permanently to the engine 2.
  • the use of a pipe for feeding a device allows avoid using a pipe dedicated to the maintenance of the flow when all the valves are closed.
  • a portion of the secondary pipe 10 is free of closure.
  • a shutter 31 is able to selectively close the inlet of the pipe 10, with the exception of a portion intended to convey the cooling liquid permanently to the engine 2.
  • the shutter 31 is slidably mounted in the housing 3 between an open position of the inlet of the pipe 10 and a closed position of this inlet with the exception of the portion intended for the permanent flow.
  • the junction between the pipe 10 and the outlet housing 3 may also have a protrusion not closed by the shutter 31.
  • the permanent passage portion may for example comprise a section between 8 and 20 mm 2 .
  • a deflector 32 is disposed in the housing 3 and guides a coolant flow (illustrated by the dashed arrow) to the closed portion.
  • the deflector 32 is arranged so that the thermostatic valve 5 and the temperature sensor 4 are arranged in this flow.
  • the deflector 32 will advantageously be arranged vis-à-vis the temperature sensor 4 and the thermostatic valve 5, to better guide the flow on these components.
  • the temperature sensor 4 and the thermostatic valve 5 will be subjected to a coolant temperature representative of the engine temperature.
  • the probe 4 and the valve 5 are advantageously arranged close to each other.
  • the deflector 32 illustrated has a rectilinear section.
  • a deflector according to the invention may have any suitable forms for guiding the flow as a function of the geometry of the coolant outlet box 3
  • thermostatic valves 5 Different types of thermostatic valves 5, known to those skilled in the art, may be used.
  • the thermostatic valve may in particular comprise a member 51 whose thermal expansion displaces a seal and thus releases the flow in the conduit 6 between the outlet housing 3 and the radiator 7 beyond a predefined temperature.
  • the dilation member 51 may in particular be made of wax.
  • Other thermostatic valves may have a fusible membrane melting at a safety temperature in order to connect the outlet housing 3 with the radiator 7.
  • Other thermostatic valves 5 may in particular include a thermomechanical closure member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Temperature-Responsive Valves (AREA)
EP20090152220 2008-02-14 2009-02-05 Kühlmittelkreislauf eines Motors Expired - Fee Related EP2090763B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0850933A FR2927660B1 (fr) 2008-02-14 2008-02-14 Circuit de refroidissement moteur

Publications (2)

Publication Number Publication Date
EP2090763A1 true EP2090763A1 (de) 2009-08-19
EP2090763B1 EP2090763B1 (de) 2010-11-17

Family

ID=39820891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090152220 Expired - Fee Related EP2090763B1 (de) 2008-02-14 2009-02-05 Kühlmittelkreislauf eines Motors

Country Status (4)

Country Link
EP (1) EP2090763B1 (de)
DE (1) DE602009000354D1 (de)
ES (1) ES2355793T3 (de)
FR (1) FR2927660B1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1091666A (en) * 1965-10-25 1967-11-22 British Thermostat Co Ltd Improvements in thermostatically-controlled valves
EP0301959A1 (de) * 1987-07-31 1989-02-01 Automobiles Peugeot Kühlflüssigkeitsauslassgehäuse für eine Dieselmaschine
US4981260A (en) * 1989-10-23 1991-01-01 Automotive Products Company Failsafe thermostat for water-cooled engines
EP0767299A2 (de) * 1995-10-05 1997-04-09 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Thermostatventil für den Kühlkreislauf einer Brennkraftmaschine
EP1873370A1 (de) * 2006-06-29 2008-01-02 Peugeot Citroen Automobiles SA Kühlmittelkreislauf eines Kraftfahrzeugmotors, der ein Rohr zur Flüssigkeitszirkulation für einen Temperaturmessfühler umfasst

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1091666A (en) * 1965-10-25 1967-11-22 British Thermostat Co Ltd Improvements in thermostatically-controlled valves
EP0301959A1 (de) * 1987-07-31 1989-02-01 Automobiles Peugeot Kühlflüssigkeitsauslassgehäuse für eine Dieselmaschine
US4981260A (en) * 1989-10-23 1991-01-01 Automotive Products Company Failsafe thermostat for water-cooled engines
EP0767299A2 (de) * 1995-10-05 1997-04-09 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Thermostatventil für den Kühlkreislauf einer Brennkraftmaschine
EP1873370A1 (de) * 2006-06-29 2008-01-02 Peugeot Citroen Automobiles SA Kühlmittelkreislauf eines Kraftfahrzeugmotors, der ein Rohr zur Flüssigkeitszirkulation für einen Temperaturmessfühler umfasst
FR2903143A1 (fr) 2006-06-29 2008-01-04 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

Also Published As

Publication number Publication date
ES2355793T3 (es) 2011-03-31
DE602009000354D1 (de) 2010-12-30
FR2927660B1 (fr) 2010-02-12
EP2090763B1 (de) 2010-11-17
FR2927660A1 (fr) 2009-08-21

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