EP0484624A1 - Soupape thermostatique pour la régulation de la température du liquide de refroidissement d'un moteur à combustion interne - Google Patents

Soupape thermostatique pour la régulation de la température du liquide de refroidissement d'un moteur à combustion interne Download PDF

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Publication number
EP0484624A1
EP0484624A1 EP91109208A EP91109208A EP0484624A1 EP 0484624 A1 EP0484624 A1 EP 0484624A1 EP 91109208 A EP91109208 A EP 91109208A EP 91109208 A EP91109208 A EP 91109208A EP 0484624 A1 EP0484624 A1 EP 0484624A1
Authority
EP
European Patent Office
Prior art keywords
thermostatic valve
valve according
working
spring
piston
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
EP91109208A
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German (de)
English (en)
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EP0484624B1 (fr
Inventor
Hans Dipl.-Ing. Wahler
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.)
Gustav Wahler GmbH and Co KG
Original Assignee
Gustav Wahler GmbH and Co KG
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
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Application filed by Gustav Wahler GmbH and Co KG filed Critical Gustav Wahler GmbH and Co KG
Publication of EP0484624A1 publication Critical patent/EP0484624A1/fr
Application granted granted Critical
Publication of EP0484624B1 publication Critical patent/EP0484624B1/fr
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
    • 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
    • F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
    • 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
    • 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
    • F01P2070/00—Details
    • F01P2070/04—Details using electrical heating elements

Definitions

  • the invention relates to a thermostatic valve for regulating the temperature of the cooling liquid of an internal combustion engine of the type mentioned in the preamble of claim 1.
  • the abutment on which the working piston is supported is part of a coaxial temperature-dependent working element which, for example, can be heated electrically.
  • the arrangement is such that the piston of this actuator guided out of the housing forms the abutment for the working piston of the working element of the thermostatic valve.
  • Heating with pushing out the piston causes the working piston to act in the sense of a shift to a lower opening temperature of the thermostatic valve, for example an adjustment to so-called summer operation.
  • This has the disadvantage that For example, in the event of a power failure in the heating circuit's supply circuit, the heating fails and then the thermostatic valve is automatically moved out of this work area into another work area in which the valve only opens at a higher temperature and which corresponds, for example, to so-called winter operation.
  • the information summer operation and winter operation alone are used for better understanding, without the respective working area being thereby fixed to any temperature.
  • thermostatic valve is automatically set to a working position in which the valve only opens at a higher temperature in the event of a power failure of the heating, this can lead to increased stress or even damage to the internal combustion engine, for example if the internal combustion engine is operated at full load if there are higher outside temperatures or the like
  • the invention has for its object to provide a thermostatic valve of the type mentioned in such a way that it is ensured in a simple and cost-saving manner that the thermostatic valve is automatically adjusted in the event of malfunctions with respect to the abutment adjustment in the starting position assigned to the lower working temperature.
  • the object is achieved according to the invention in a thermostatic valve of the type mentioned in the preamble of claim 1 by the features in the characterizing part of claim 1.
  • the support part and above the working piston of the working element of the thermostatic valve is automatically pressed into the starting position by the spring, which the corresponds to the lower opening temperature of the thermostatic valve, e.g. summer operation. This ensures that in the event of any malfunctions of the element causing the adjustment of the support part, the thermostatic valve is always brought to the starting position assigned to the lower working temperature, thereby avoiding an undesirable higher load or even damage to the internal combustion engine.
  • the drawing shows a schematic axial longitudinal section of a thermostatic valve, and to the left of the longitudinal central axis in a setting with a low opening temperature and to the right of the longitudinal central axis in a setting with a higher opening temperature.
  • the thermostatic valve 10 shown in the drawing is e.g. Similar to that according to DE-OS 33 15 308 or 37 05 232 and is used to regulate the temperature of the cooling liquid of an internal combustion engine, not shown, in particular a motor vehicle engine.
  • the thermostatic valve 10 regulates the coolant flow from the internal combustion engine (not shown further) through a bypass and / or through a heat exchanger (not shown) back to the internal combustion engine.
  • the thermostatic valve 10 has a valve housing 11 which has a connecting piece 12, via which the coolant can be guided to the heat exchanger.
  • a thermostatic working element 13 is arranged, which has a working piston 14 and a housing 15, in which there is in a known manner an expansion material which can expand when heated and can push out the working piston 14 relative to the housing 15. When it cools down, the expansion material reduces its volume.
  • the working piston 14 is then moved under the action of a valve spring 16 relative to the housing 15 back into the starting position, i.e. pressed into the housing 15.
  • valve plate 17 On the housing 15 of the working element 13, a valve plate 17 is fastened, which is pressed on, crimped or fixed in some other way.
  • the valve plate 17 forms the valve closure member of the thermostatic valve 10. Its outer edge is assigned, for example, a frusto-conical valve seat 18 in the valve housing 11.
  • the valve spring 16 is axially supported at one end by means of a bracket 19 or the like, which in turn is held in arms 20 of the valve housing 11 depending on recesses 20.
  • the other end of the valve spring 16 is supported on the valve plate 17 and strives to press the valve plate 17 in the valve closing direction according to arrow 22 and against the valve seat 18. The drawing shows this condition.
  • Valve plate 17 and the associated valve seat 18 closes or opens the connection between an inlet, not shown, which can be provided, for example, in the area of the arms 21 and in a housing there, and the connecting piece 12 leading to the heat exchanger, in particular the cooler.
  • valve plate 23 is slidably arranged on the housing 15 and is supported on the housing 15 by means of a spring 24.
  • the valve plate 23 is used in a known manner to control a bypass channel, not shown, contained in a connection housing and thus the direct return of the coolant back to the engine.
  • the working piston 14 of the thermostatic valve 10 is axially supported on an abutment, which is generally designated 25.
  • the drawing shows the thermostatic valve in the starting position when the internal combustion engine is cold. If the internal combustion engine is started, the working element 13 is acted upon by the coolant coming from the engine, which is first led into the bypass channel (not shown) at low temperature and with the valve plate 23 open, while the coolant does not get into the connecting piece 12 due to the closed valve plate 17 can. With increasing heating of the cooling liquid, the expansion material in the housing 15 expands. When a temperature determined by the design of the expansion material is reached, the working piston 14 is extended over a specific working range according to a specific characteristic which is dependent on the expansion material.
  • the thermostatic valve 10 in particular the thermostatic working element 13, is set to a temperature range in which the working piston 14 is moved out of the housing 15 with a linear movement.
  • This temperature range is determined by the choice of the expansion material and other parameters.
  • the abutment 25 is axially adjustable, whereby the working range of the thermostatic valve 10 can be changed by an intervention from the outside.
  • the abutment 25 has an axially adjustable support part 26.
  • the support part 26 has a plunger 28 axially guided in a bore 27 in the valve housing 11 with an end-side ring part 29 into which the free end of the working piston 14 engages.
  • Part of the support member 26 is also an approximately V-shaped or U-shaped bracket 30, the opening of which is arranged on the side facing away from the working piston 14, that is to say in the drawing above.
  • the bracket 30 has, for example, two diametrically extending arms 31 and 32 which have a receptacle 33 in the region of the facing end of the plunger 28, in which the plunger 28 in the pulling and pushing directions is firmly accepted.
  • the support member 26 is therefore firmly connected to the working piston 14 in the pulling and pushing directions. Because of the housing part 34, in which the bore 27 leading the plunger 28 is contained, good and coaxial guidance to the working piston 14 is thereby ensured.
  • the support member 26 is arranged coaxially to the working piston 14 and connected to the latter.
  • the support member 26 is urged by means of a spring 35, which is designed here as a cylindrical helical spring, in the opposite direction to the valve closing direction according to arrow 22 and pressed into the starting position, which is shown in the drawing on the left of the longitudinal central axis.
  • the spring 35 has a greater spring stiffness than the valve spring 16, so that when the thermostatic working element 13 responds and the housing 15 moves relative to the supported working piston 14, the valve spring 16 is compressed, while the axial position of the abutment 25, in particular the supporting part 26, remains unchanged .
  • the support member 26 is adjustable by means of an actuator 36 against the action of its spring 35.
  • the actuator 36 can be designed in various ways as an externally controllable element.
  • the actuator 36 is designed in a particularly advantageous manner as a temperature-dependent working element 37 similar to the thermostatic working element 13.
  • the actuator 36 is designed in particular as an expansion element which contains expansion material in a housing 38, into which a piston 39 is immersed and which is led out of the housing.
  • the temperature-dependent working element 37 can be heated.
  • an electric heating element 40 is used, which here consists of a PTC element in a known manner.
  • This actuator 36 designed in this way, in particular temperature-dependent working element 37, is arranged coaxially with the working piston 14. It is located on the axial side adjacent to the working piston 14.
  • the supporting part 26 is coupled to the actuator 36, in particular the working element 37, in such a way that an axial actuating force directed in the valve closing direction according to arrow 22 results in an axial adjustment of the supporting part 26 against the action of the spring 35 acting thereon, e.g. from the starting position shown on the left of the longitudinal central axis to the other position shown on the right of the longitudinal central axis, in which the abutment 25 has been displaced axially further upwards, which e.g. corresponds to a higher opening temperature in the working element 13.
  • a ring 41 is fastened, which the housing 38 of the actuator 36 arranged coaxially to the working piston 14, in particular temperature-dependent working elements 37, e.g. includes with play and by means of the spring 35 in the opposite direction to the valve closing direction according to arrow 22 to a driver 42 of the actuator 36, in particular of the working element 37, is pressed.
  • the driver 42 is here e.g. from an annular shoulder of the housing 38, on which the ring 41 bears positively so that it cannot slide further down in the drawing.
  • the driver 42 consists of a radial projection or the like.
  • the spring 35 which is supported at one end on the ring 41 and thus on the support part 26, is at its other end facing away from the support part 26 on a housing part 43 axially supported.
  • This housing part 43 is designed, for example, as a rotationally symmetrical cup which is attached to the valve housing 11 with its end which is approximately adjacent to the support part 26. This end is formed here, for example, as a ring edge 44.
  • the housing part 43 is held at this end, for example by means of a flange connection on the valve housing 11. The attachment here is carried out by a flanged edge 45 of the valve housing 11 which overlaps the ring edge 44.
  • the upper bottom part of the housing part 43 in the drawing contains a central opening 46 through which the end of the actuator 36, in particular temperature-dependent working element 37, extends outwards.
  • the spring 35 and / or the housing part 43 surrounds the actuator 36, in particular the temperature-dependent working element 37, with a radial distance, these parts being arranged at least essentially coaxially and concentrically with one another.
  • the actuator 36, in particular temperature-dependent working element 37 is arranged so that its piston 39 is directed towards the working piston 14.
  • the piston 39 is axially supported on the valve housing 11, in particular on the housing part 34 located approximately in the middle. If the working range is to be adjusted from that on the left of the longitudinal central axis to that on the right of the longitudinal central axis, the circuit feeding the heating element 40 is closed.
  • the electric heating element 40 heats up, so that the expansion material contained in the housing 38 expands.
  • the bridge member 47 To support the piston 39, e.g. reversed U-shaped bridge member 47 is provided, which is designed similar to a fork.
  • the bridge member 47 has an upper web part 48, to which two spaced, approximately parallel legs extend downward, of which only one leg 49 can be seen in the drawing due to the sectional view. Between the spaced legs 49 of the bridge member 47, the two bracket arms 31 and 32 of the bracket 30 engage with play and move through, so that the axial adjustment movement of the support member 26 is not hindered thereby.
  • the bridge member 47 is held and supported at the end of its legs 49 on the valve housing 11, specifically on the housing part 34.
  • the bridge member 47 forms an axial abutment for the piston 39 of the actuator 36, in particular temperature-dependent working elements 37.
  • the web part 48 contains e.g. a bore 50 in which the end of the piston 39 is received.
  • the circuit feeding the electrical heating element 40 is opened.
  • the heating and thus heating of the working element 37 is thus interrupted, so that the working element 37 can cool down again.
  • the cooling results in a reduction in the volume of the expansion material in the housing 38.
  • the spring 35 can adjust the support part 26 and with this the housing 38 relative to the axially supported piston 39 in the axial direction in the opposite direction to the arrow 22 into the other position shown on the left of the longitudinal central axis.
  • the temperature-dependent working element 13 is at a lower opening temperature set so that it opens at a lower temperature of the coolant in the manner described above.
  • the thermostatic valve 10 is simple, inexpensive and can be assembled using simple means and in a modular manner, since e.g. the thermostatic working elements 13 and 37 can be identical or at least functionally identical. Above all, the thermostatic valve has the advantage that, under the action of the spring 35, it then automatically returns to the starting position shown to the left of the longitudinal central axis and thus to a lower opening temperature, e.g. the electrical supply to the heating element 40 is interrupted by a malfunction or the like. In these cases, any impairment or even damage to the internal combustion engine is reliable and is ruled out in a simple and inexpensive manner.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Temperature-Responsive Valves (AREA)
EP91109208A 1990-11-06 1991-06-06 Soupape thermostatique pour la régulation de la température du liquide de refroidissement d'un moteur à combustion interne Expired - Lifetime EP0484624B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4035179A DE4035179A1 (de) 1990-11-06 1990-11-06 Thermostatventil zur regelung der temperatur der kuehlfluessigkeit einer brennkraftmaschine
DE4035179 1990-11-06

Publications (2)

Publication Number Publication Date
EP0484624A1 true EP0484624A1 (fr) 1992-05-13
EP0484624B1 EP0484624B1 (fr) 1994-07-13

Family

ID=6417696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91109208A Expired - Lifetime EP0484624B1 (fr) 1990-11-06 1991-06-06 Soupape thermostatique pour la régulation de la température du liquide de refroidissement d'un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP0484624B1 (fr)
DE (2) DE4035179A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6039263A (en) * 1996-09-17 2000-03-21 Modine Manufacturing Company Thermally responsive valve assembly
EP1041256A1 (fr) * 1999-03-30 2000-10-04 Vernet S.A. Dispositif thermostatique à deux régimes de régulation, à deux éléments thermostatiques
FR2805591A1 (fr) * 2000-02-28 2001-08-31 Vernet Sa Dispositif thermostatique a deux regimes de regulation commandes selectivement
FR2811709A1 (fr) * 2000-07-17 2002-01-18 Vernet Sa Dispositif thermostatique pilote a commande proportionnelle, a element thermostatique de securite
GB2495096A (en) * 2011-09-28 2013-04-03 Gm Global Tech Operations Inc A thermostat with an auxiliary wax chamber for very cold starts

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4233913C2 (de) * 1992-10-08 2003-04-30 Behr Thermot Tronik Gmbh Elektrisch beheizbares Thermostatventil für einen Kühlmittelkreislauf eines Verbrennungsmotors
DE4332101B4 (de) * 1993-09-22 2005-09-15 Bayerische Motoren Werke Ag Kühlvorrichtung für einen flüssigkeitsgekühlten Verbrennungsmotor eines Kraftfahrzeuges
DE4422272A1 (de) * 1994-06-24 1996-01-04 Bayerische Motoren Werke Ag Kühlvorrichtung für einen flüssigkeitsgekühlten Verbrennungsmotor eines Kraftfahrzeuges
DE4444685A1 (de) * 1994-12-15 1996-06-20 Behr Thomson Dehnstoffregler Thermostatisches Arbeitselement mit einem elektrischen Widerstandsheizelement
DE4445588C2 (de) * 1994-12-20 2002-12-05 Danfoss As Membrangesteuertes Differenzdruckventil
US5775270A (en) * 1994-12-21 1998-07-07 Behr Thermot-Tronik Gmbh & Co. Thermostatic valve for the coolant circulation system of an internal-combustion engine
EP0787929B1 (fr) * 1996-02-01 2001-04-11 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Dispositif pour tempérer la température de l'huile de transmission d'un véhicule automobile
DE29610679U1 (de) * 1996-06-18 1997-11-27 Behr Thermot-Tronik Gmbh & Co., 70806 Kornwestheim Stellmotor mit einem thermostatischen Arbeitselement
DE19940975A1 (de) * 1999-08-28 2001-03-01 Mann & Hummel Filter Dehnstoffthermostat
DE102007005557B4 (de) 2007-01-24 2019-06-19 Mahle International Gmbh Thermostatventil für eine Kühlmittelströmung
DE102009055936B4 (de) 2009-11-26 2024-11-28 IMI Hydronic Engineering Deutschland GmbH Zweiwege-Rücklauftemperaturregelventil für Kühlanlagen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2029590A1 (de) * 1970-06-16 1971-12-23 Maschinenfabrik Augsburg Nürnberg AG, 8500 Nürnberg Bauteiltemperaturregler fur flussig keitsgekuhlte Brennkraftmaschinen
DE3315308A1 (de) * 1983-04-27 1984-10-31 Gustav Wahler Gmbh U. Co, 7300 Esslingen Kuehlwasserregler fuer brennkraftmaschinen
US4560104A (en) * 1982-12-06 1985-12-24 Nissan Motor Co., Ltd. Coolant temperature control system of internal combustion engine
GB2170884A (en) * 1985-02-12 1986-08-13 Behr Thomson Dehnstoffregler Thermostatic valves
EP0272117A2 (fr) * 1986-12-19 1988-06-22 Adwest Group PLC Système de commande thermostatique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2029590A1 (de) * 1970-06-16 1971-12-23 Maschinenfabrik Augsburg Nürnberg AG, 8500 Nürnberg Bauteiltemperaturregler fur flussig keitsgekuhlte Brennkraftmaschinen
US4560104A (en) * 1982-12-06 1985-12-24 Nissan Motor Co., Ltd. Coolant temperature control system of internal combustion engine
DE3315308A1 (de) * 1983-04-27 1984-10-31 Gustav Wahler Gmbh U. Co, 7300 Esslingen Kuehlwasserregler fuer brennkraftmaschinen
GB2170884A (en) * 1985-02-12 1986-08-13 Behr Thomson Dehnstoffregler Thermostatic valves
EP0272117A2 (fr) * 1986-12-19 1988-06-22 Adwest Group PLC Système de commande thermostatique

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6039263A (en) * 1996-09-17 2000-03-21 Modine Manufacturing Company Thermally responsive valve assembly
EP1041256A1 (fr) * 1999-03-30 2000-10-04 Vernet S.A. Dispositif thermostatique à deux régimes de régulation, à deux éléments thermostatiques
FR2791787A1 (fr) * 1999-03-30 2000-10-06 Vernet Sa Dispositif thermostatique a deux regimes de regulation, a deux elements thermostatiques
US6471134B2 (en) 1999-03-30 2002-10-29 Vernet S.A. Thermostatic device having two regulating conditions and two thermostatic elements
FR2805591A1 (fr) * 2000-02-28 2001-08-31 Vernet Sa Dispositif thermostatique a deux regimes de regulation commandes selectivement
EP1132590A1 (fr) * 2000-02-28 2001-09-12 Vernet S.A. Dispositif thermostatique à deux régimes de régulation commandés sélectivement
US6439467B2 (en) 2000-02-28 2002-08-27 Vernet S.A. Thermostatic device with two levels of regulation operated selectively
FR2811709A1 (fr) * 2000-07-17 2002-01-18 Vernet Sa Dispositif thermostatique pilote a commande proportionnelle, a element thermostatique de securite
EP1174603A1 (fr) * 2000-07-17 2002-01-23 Vernet S.A. Dispositif thermostatique piloté à commande proportionnelle, à élément thermostatique de sécurité
US6505580B2 (en) 2000-07-17 2003-01-14 Vernet S.A. Driven proportional-control thermostatic device with back-up thermostatic element
GB2495096A (en) * 2011-09-28 2013-04-03 Gm Global Tech Operations Inc A thermostat with an auxiliary wax chamber for very cold starts
US8651069B2 (en) 2011-09-28 2014-02-18 GM Global Technology Operations LLC Wax type thermostat for the cooling system of an internal combustion engine

Also Published As

Publication number Publication date
DE59102172D1 (de) 1994-08-18
DE4035179A1 (de) 1992-05-07
EP0484624B1 (fr) 1994-07-13

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