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EP0098979B1 - Dispositif de réglage de température dans un circuit de refroidissement d'un moteur à combustion interne, spécialement pour un moteur de véhicule - Google Patents

Dispositif de réglage de température dans un circuit de refroidissement d'un moteur à combustion interne, spécialement pour un moteur de véhicule Download PDF

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Publication number
EP0098979B1
EP0098979B1 EP83105752A EP83105752A EP0098979B1 EP 0098979 B1 EP0098979 B1 EP 0098979B1 EP 83105752 A EP83105752 A EP 83105752A EP 83105752 A EP83105752 A EP 83105752A EP 0098979 B1 EP0098979 B1 EP 0098979B1
Authority
EP
European Patent Office
Prior art keywords
thermostatic
valve
working
working piston
abutment
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.)
Expired
Application number
EP83105752A
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German (de)
English (en)
Other versions
EP0098979A1 (fr
Inventor
Roland Saur
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.)
Behr Thomson Dehnstoffregler GmbH and Co
Original Assignee
Behr Thomson Dehnstoffregler GmbH and Co
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6168294&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0098979(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Behr Thomson Dehnstoffregler GmbH and Co filed Critical Behr Thomson Dehnstoffregler GmbH and Co
Publication of EP0098979A1 publication Critical patent/EP0098979A1/fr
Application granted granted Critical
Publication of EP0098979B1 publication Critical patent/EP0098979B1/fr
Expired 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

Definitions

  • the invention relates to a thermostatic valve for regulating the temperature of the coolant of an internal combustion engine, in particular a motor vehicle engine, which regulates the coolant flow from the internal combustion engine through a short circuit (by-pass) and / or through a heat exchanger back to the internal combustion engine, with a housing for expansion material the valve disk carries and when heated by extending a piston supported by an abutment adjustable to different distances from the housing of the thermostatic working element causes the stroke of the valve plate, the instantaneous support point of the working piston in the abutment being determined by an actuator from external parameters.
  • thermostatic valve in which the thermostatic valve is set so that it releases the connection to the heat exchanger from a certain temperature below the operating temperature. This ensures that the internal combustion engine is heated to the operating temperature in the shortest possible time.
  • a thermostatic valve of the type mentioned at the outset is also known (GB-A-2 086 536), in which an abutment in the form of a pivotably mounted lever is associated with the working piston of the thermostatic working element, with which the working piston is positively connected.
  • the lever is also articulated to a pressure cell serving as an actuator, which is connected to the intake manifold of the internal combustion engine and is acted upon by the intake manifold vacuum. This is intended to adapt the valve position of the thermostatic valve to the increased cooling requirement at high load.
  • the pressure socket positively connected to the working piston of the thermostatic working element pulls the working piston out of the thermostatic working element under certain operating conditions, so that a cavity is created between the end of the working piston and a membrane surrounding it. When this cavity is created, a negative pressure inevitably arises, so that coolant is sucked in between the membrane and the working piston. If the pressure can then push the working piston back into the thermostatic working valve, the cooling liquid located in the cavity must first be expelled, which, if it is achieved completely, is only possible with a time delay, so that the valve characteristic is falsified.
  • the invention has for its object to provide a thermostatic valve of the type mentioned with simple and reliable means so that a change in the valve characteristics can be determined by means of an actuator of external parameters, without the risk of unwanted falsification of this valve characteristic.
  • a support body serves as an abutment for the working piston, which has a supporting surface for the free end of the working piston, on which the working piston is supported only up to the closed position of the valve plate.
  • a separation point is provided between the working piston and the actuator in the region of the support body, so that the actuator and the support body can move independently of the working piston, particularly when moving back in the closing direction of the valve plate. This ensures that the working piston is not pulled out of the thermostatic working element under any of the possible operating conditions, so that changes within the thermostatic working element are prevented, which could cause the control characteristic to be falsified.
  • An effective control is thus possible which, in addition to the existing outside temperature, can also use values other than reference variables for the control, for example the exhaust gas temperature, the speed and / or the torque of the internal combustion engine, the negative pressure in the intake manifold, the pressure difference at a vacuum socket, the Oil temperature or the like. Using these values, it is possible to regulate the temperature of the internal combustion engine within certain limits in order to optimize the operation of the internal combustion engine.
  • an inlet 17 for the coolant of an internal combustion engine is provided, which can be connected via a thermostatic valve to a direct return 18 and / or to a connecting piece 15 leading to a heat exchanger (not shown).
  • a line leads from the heat exchanger back to the internal combustion engine in a manner also not shown.
  • the thermostatic valve has a thermostatic working element, which has a working piston 2 and a housing 3.
  • An expansion material is accommodated in the housing 3, which expands when heated and thereby drives the working piston 2 out of the housing 3. When cooling, the expansion material reduces its volume so that the working piston 2 can be pressed back into the housing 3.
  • a valve plate 4 is fixedly connected to the housing 3 of the thermostatic working element, for example by pressing or flanging or the like, which is assigned with a conical edge to a right-angled valve seat 16 which is formed by the connecting piece 15.
  • the valve formed from the valve plate 4 and the valve seat 16 closes or opens the connection between the inlet 17 and the connection stub 15 leading to the heat exchanger.
  • the valve plate 4 is held in the closed position shown with a conical compression spring 19.
  • a further valve plate 20 is arranged on the housing 3 by means of a sliding guide, which is assigned to the direct return 18, which has a valve seat 21 assigned to the valve plate 20.
  • the valve plate 20 is loaded with a compression spring 22 which is supported on the housing 3 in the region of the valve plate 4.
  • the inlet 17 is located between the two valve plates 4 and 20.
  • the working piston 2 of the thermostatic working element is supported on an abutment 1.
  • the thermostatic valve When the internal combustion engine is started and the coolant is circulated, the thermostatic valve is in the position shown in FIG. H. the connection from the inlet to the connecting piece 15 is closed and the connection to the direct return 18 is open.
  • the coolant flows around the housing 3 of the thermostatic working element.
  • the working piston 2 When a temperature determined by the design of the expansion material of the thermostatic working element is reached, the working piston 2 is extended over a specific working range according to a specific characteristic which is dependent on the expansion material.
  • the working piston 2, which is supported on the abutment 1 then moves the housing 3 with the valve disks 4 and 20, so that initially both valves 4, 16 and 20, 21 are open over a certain temperature range, while the valve 20 then increases as the temperature increases further , 21 is closed and only the valve 4, 16 is open.
  • the abutment 1 is independent of and provided relative to the thermostatic working element adjustable support body 5 which is displaceable transversely to the axis of the working piston 2 and which has a supporting surface 13 inclined to the axis of the working piston 2.
  • the direction of displacement of the support body 5 and the inclination of the support surface 13 are selected relative to the axis of the working piston 2 so that the adjustment movement of the support body is converted into a change in the area X with a reduction, if necessary a translation can also be set.
  • the support point 13 of the support surface 13, which is the most distant from the housing 3 and the valve 4, is in use, so that opening of the valve 4, 16 (and closing of the valve 20, 21) takes place only at an elevated level Temperature of the coolant takes place, which is desirable, for example, at low outside temperatures.
  • the working piston 2 must first travel an empty travel of size X before it is actually supported on the support surface 13 and can move it and the valve disks 4 and 20 by further extending out of the housing 3.
  • the free travel of the working piston 2 can be reduced, so that the working range of the thermostatic working element and thus the thermostatic valve is thus shifted to a lower temperature level, as is the case, for example, with high temperatures Outside temperatures is desired.
  • the working piston 2 With the same heating of the thermostatic working element, the working piston 2 then reaches the stop surface 13 earlier, so that the opening movement of the valve 4, 16 (and the closing movement of the valve 20, 21) begins earlier.
  • support points lying between the two end points of the inclined support surface 13 can also be selected, so that the working range of the thermostatic valve can be varied continuously within the selected limits.
  • the displacement of the support body 5 of the abutment 1 takes place in the illustrated from leadership form by an actuator 9 which is designed as a thermostatic working element.
  • an actuator 9 which is designed as a thermostatic working element.
  • a working piston 23 is moved out of the thermostatic working element 9. which is correspondingly moved back on cooling, for which purpose a return spring 25 is provided which loads the support body 5, which is a piston which is aligned coaxially with the working piston 23 and which is in a guide of a.
  • Housing 26 slides, which is integrally formed with the connecting piece 15.
  • the thermostatic working element 9 is screwed into this housing 26 with a threaded shoulder 27.
  • the thermostatic working element 9 is provided in a known manner with an electrical heating element, for example a PTC resistor, so that the linear movement of the working piston and thus the setting of the working range of the thermostatic valve can be controlled electrically.
  • the current supply to the thermostatic working element is effected by a signal converter 28, which can be activated on the basis of a wide variety of reference variables.
  • a signal converter 28 which can be activated on the basis of a wide variety of reference variables.
  • the return spring 25 In order to be able to change the working range of the thermostatic valve, even if the working piston 2 of the thermostatic working element of the thermostatic valve is already fully or partially extended, the return spring 25 must be designed so that it overcomes the force of the spring 19 and that Valve 4, 16 can be opened by moving the housing 3 with the valve plate 4.
  • the connecting piece 15 with the thermostatic valve and the adjustable abutment 1 is formed as a structural unit which can be assembled as a whole and, if necessary, exchanged.
  • the embodiment of FIG. 1 can also be modified such that the device works without the supply of auxiliary energy, i. that is, the thermostatic working element 9 performs an adjustment of the support body 5, depending on the ambient temperature.
  • the thermostatic working element 9 can be designed by the choice of the expansion material contained in it so that at low ambient temperatures up to, for example, 15 ° C., the valve 4, 16 opens when the coolant temperature is higher than at ambient temperatures of more than 15 ° C. . In this.
  • the thermostatic working element 9 and the return spring 25 would have to be interchanged with one another, so that when the working piston 23 of the working element is retracted, the ambient temperature of the supporting surface 13 of the supporting surface 13 that is used is further from the housing 3 and the valve 4 and also the valve seat 16 is removed than when the working piston 23 of the working element 9 is extended (higher ambient temperature).
  • FIG. 2 to 5 show further exemplary embodiments of actuators with which the working range of a thermostatic valve can be shifted according to FIG. 1 by providing an externally adjustable abutment for the working piston 3 of the thermostatic working element.
  • Linear actuators or rotating actuators can be provided.
  • the exemplary embodiments shown represent only a section of the most varied possibilities, which can work with or without the supply of auxiliary energy. Actuators with hydraulic or pneumatic actuators can also be easily provided.
  • a reversible rotary motor 10 is provided as an actuator, which engages with a drive pinion 29 in a rack 30 of a support body 6, which can be moved back and forth transversely to the axis of a working piston 2 of a thermostatic working element is to adjust the work area by the amount X of a thermostatic valve.
  • a support surface 14 extending obliquely to the axis of the working piston 2 is connected to the toothed rack 30.
  • the rotary motor 10 is designed so that it can also work against the force of the spring 19 of the thermostatic valve.
  • an actuator 11 with a linear drive movement is again provided, for example a thermostatic element or a solenoid or a motor with a rotating spindle, which loads a support body 7 designed as a double-armed lever, which around a transverse to the axis of a working piston 2 one thermostatic working element of a thermostatic valve axis is pivotable.
  • the double-armed lever 7 is loaded with a compression spring 31, which causes the return movement and which is stronger than the valve springs, not shown.
  • the support body 8 is directly adjustable in the axial direction of the working piston 2 of a thermostatic working element of a thermostatic valve.
  • the support body 8 is, for example, the working piston of a thermostatic working element 12, which is electrically heated, i.e. works with an auxiliary energy or that works without auxiliary energy and responds to the ambient temperature in this way. that his working piston remains retracted at a low ambient temperature and only extends from a certain ambient temperature.
  • the support body 8 can also be the spindle of a rotating spindle motor. It can also be the piston of a solenoid.
  • a toothed splint according to the 2 and 3 can also be provided a rotatable about an axis parallel to the pinion 29, provided with external teeth, which is provided on its side facing the working piston 2 with a cam surface serving as a support surface through which different working areas for the Working pistons are adjustable.

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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)
  • Electronic Switches (AREA)
  • Common Mechanisms (AREA)

Claims (10)

1. Soupape thermostatique pour régulation de la température du liquide de refroidissement d'un moteur à combustion interne, notamment un moteur de véhicule automobile, qui règle l'écoulement du liquide de refroidissement à partir du moteur par l'intermédiaire d'un court-circuit (dérivation) et/ou d'un échangeur de chaleur et en retour vers le moteur, et dans lequel un carter (3) pour une matière dilatable porte le plateau de soupape (4) et produit, lors d'un échauffement, par un mouvement de sortie d'un piston de travail (2) soutenu par un contre-appui (1) réglable à des espacements différents par rapport au carter (3) de l'élément de travail thermostatique, la course du plateau de soupape (4), le point d'appui instantané du piston de travail (2) dans le contre-appui (1) étant déterminé par des paramètres extérieurs au moyen d'un organe d'actionnement (5), caractérisée en ce qu'il est prévu comme contre-appui (1) pour le piston de travail (2) un corps d'appui (5, 6, 7, 8), qui comporte pour l'extrémité libre du piston de travail (2) une surface d'appui (13, 14) contre laquelle s'appuie le piston de travail (2) seulement jusqu'à la position de fermeture du plateau de soupape (4).
2. Soupape thermostatique selon la revendication 1, caractérisée en ce que l'organe d'actionnement est un élément de travail thermostatique (9, 12).
3. Soupape thermostatique selon la revendication 1, caractérisée en ce que l'organe d'actionnement contient un élément d'actionnement (9, 10, 11, 12) pouvant être entraîné par une énergie auxiliaire.
4. Soupape thermostatique selon la revendication 3, caractérisée en ce qu'il est prévu comme élément d'actionnement un élément de travail thermostatique (9, 11) pouvant être chauffé électriquement.
5. Dispositif selon une des revendications 1 à 4, caractérisé en ce que le corps d'appui (7, 8) est déplaçable dans une direction axiale du piston de travail (2).
6. Dispositif selon une des revendications 1 à 4, caractérisé en ce que le corps d'appui (5, 6) est déplaçable perpendiculairement à l'axe du piston de travail (2) et est pourvu d'une surface d'appui (13, 14) inclinée en oblique par rapport à l'axe du piston de travail (2).
7. Dispositif selon une des revendications 1 à 4, caractérisé en ce que le corps d'appui est un disque tournant qui comporte une surface de came tournée vers le piston de travail (2).
8. Dispositif selon une des revendications 1 à 7, caractérisé en ce que le contre-appui (1) est logé avec le corps d'appui (5) dans une tubulure de raccordement (15).
9. Dispositif selon la revendication 8, caractérisé en ce que la tubulure de raccordement (15) est agencée sous forme d'un siège de soupape (16) pour le plateau de soupape (4) relié au carter (3) de l'élément de travail thermostatique.
10. Dispositif selon la revendication 8 ou 9, caractérisé en ce que la tubulure de raccordement (15) constitue un ensemble unitaire avec l'élément de travail thermostatique, le contre-appui (1) et l'organe d'actionnement (9).
EP83105752A 1982-07-13 1983-06-11 Dispositif de réglage de température dans un circuit de refroidissement d'un moteur à combustion interne, spécialement pour un moteur de véhicule Expired EP0098979B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3226104A DE3226104C2 (de) 1982-07-13 1982-07-13 Thermostatventil zur Regelung der Temperatur der Kühlflüssigkeit einer Brennkraftmaschine
DE3226104 1982-07-13

Publications (2)

Publication Number Publication Date
EP0098979A1 EP0098979A1 (fr) 1984-01-25
EP0098979B1 true EP0098979B1 (fr) 1986-12-30

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ID=6168294

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EP83105752A Expired EP0098979B1 (fr) 1982-07-13 1983-06-11 Dispositif de réglage de température dans un circuit de refroidissement d'un moteur à combustion interne, spécialement pour un moteur de véhicule

Country Status (4)

Country Link
US (1) US4522334A (fr)
EP (1) EP0098979B1 (fr)
JP (1) JPS5923028A (fr)
DE (2) DE3226104C2 (fr)

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DE19728814A1 (de) * 1997-07-05 1999-01-07 Behr Thermot Tronik Gmbh & Co Kühlanlage für einen Verbrennungsmotor eines Kraftfahrzeuges
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Also Published As

Publication number Publication date
DE3226104A1 (de) 1984-01-26
DE3368723D1 (en) 1987-02-05
JPS5923028A (ja) 1984-02-06
EP0098979A1 (fr) 1984-01-25
US4522334A (en) 1985-06-11
DE3226104C2 (de) 1985-02-07

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