EP0767299B1 - Thermostatic valve for the cooling circuit of an internal combustion engine - Google Patents

Thermostatic valve for the cooling circuit of an internal combustion engine Download PDF

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Publication number
EP0767299B1
EP0767299B1 EP96115636A EP96115636A EP0767299B1 EP 0767299 B1 EP0767299 B1 EP 0767299B1 EP 96115636 A EP96115636 A EP 96115636A EP 96115636 A EP96115636 A EP 96115636A EP 0767299 B1 EP0767299 B1 EP 0767299B1
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EP
European Patent Office
Prior art keywords
valve
short
circuit
throttle
expansion element
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Expired - Lifetime
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EP96115636A
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German (de)
French (fr)
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EP0767299A3 (en
EP0767299A2 (en
Inventor
Barbu Frunzetti
Peter Leu
Heinz Lemberger
Gerhart Huemer
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Bayerische Motoren Werke AG
Behr Thermot Tronik GmbH
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Bayerische Motoren Werke AG
Behr Thermot Tronik GmbH
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Publication of EP0767299A2 publication Critical patent/EP0767299A2/en
Publication of EP0767299A3 publication Critical patent/EP0767299A3/en
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    • 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 according to the preamble of claim 1 to a Thermostat valve for the cooling circuit of an internal combustion engine, in which a Expansion element regulates a main valve of an external coolant circulation, and via the opening stroke of the main valve, a short-circuit valve controls one Mouth-side flow cross section of a feed channel of a Short circuit line of the inner coolant circulation passed elastically yielding closes, with a valve, an additional device for steering a effective coolant flow is assigned to the expansion element.
  • thermostatic valves are common and are known to be used in series engines the control / regulation of the respective liquid cooling circuit.
  • the expansion element At due from relatively cold coolant closed main valve to the flow of a radiator in the outer coolant circulation, the expansion element is substantially at least heated to the opening of the main valve via the inner coolant circulation. That the thermostat from a short-circuited valve open Inflow channel of the short-circuit line of the inner coolant circulation inflowing, heated coolant is arranged in the short-circuit valve according to DE 31 38 368 A1 Openings directed to the expansion element to promote the control quality; further measures to promote the control quality are not provided.
  • an improvement in the control quality is according to DE 35 10 148 A1 by a coolant flow device arranged downstream of the valve in the course of the flow reached; the valve itself has no special features to improve the Control quality on.
  • the invention has for its object to provide a thermostat of the type described above To improve type such that at substantially inner coolant circulation (Short circuit operation) whose effect on the expansion element of the Thermostatic valve is increased in direct inflow or flow.
  • the additional device a an inlet channel of the short-circuit line pressurized elastically yielding guided releasing throttle valve with throttle openings, wherein the short-circuit valve arranged on the expansion element Druchbrechungen arranged such has, that the short-circuit valve from a predetermined opening stroke of the main valve closes the throttle openings of the throttle valve (FIGS. 3, 4, 5).
  • the known throttle valve causes by means of the reduction of the internal Coolant circulation a faster coolant recovery, the invention for Improvement of the control quality is used.
  • Preferred embodiments of the third embodiment according to the invention are in further claims. Their advantage is the possibility of a relative low construction combined with low installation space.
  • thermostatic valve 1 for the cooling circuit a not shown in detail, liquid-cooled internal combustion engine comprises an expansion element 2, which serves as a servomotor of a main valve 3 in a outer coolant circulation of the temperature control of the coolant is used.
  • the at 4 machine side in a cover 5 supported arranged expansion element. 2 has at the opposite end to a control pin 6, which has a U-shaped Bracket 7 is in drive connection with the main valve 3.
  • the guided in a beam or star-shaped Traverse 8 drive handle 7 has a control pin 6 receiving extension 9, which on the outer circumference a to the drive bracket 7 towards elastically yielding short-circuit valve 10 carries.
  • This arrangement serves to ensure that the short-circuit valve 10 in a predetermined Way over the caused by the expansion element 2 opening stroke controlled the main valve 3, a flow cross-section of a feed channel eleventh a short-circuit line 11 'of the inner coolant circulation closes.
  • Each thermostatic valve 1 according to the figures 1 to 4 is in each case an additional device for directing an increased efficiency of the coolant flow the inner coolant circulation downstream of the located in an open position Short-circuit valve 10 is provided on the expansion element 2.
  • the flow cross-section controlling, plate-like short-circuit valve 10 is the mouth 12 of the inlet channel 11 a the short-circuit valve 10 enclosing nozzle 13 as an additional device with a directed to the expansion element 2 outflow 14 as Associated with flow steering device.
  • thermostatic valve 1 shown in Figure 2 as an additional device an the inlet channel 11 of the short-circuit line 11 'pressurized elastically yielding guided releasing throttle valve 16 with throttle openings 15 provided, wherein the slidably guided on the extension 9 throttle valve 16 expansion element side, a nozzle 17 enclosing the short-circuit valve 10 as another part of the additional device with a on the expansion element. 2 directed outlet opening 18 is assigned.
  • the throttle openings 15 in the known to serve as a warm-up valve throttle valve 16 are from a predetermined opening stroke of the main valve 3 by the plate-like design Short-circuit valve 10 closable.
  • thermostatic valves 1 of Figures 3 and 4 each form throttle openings 19 pressurized in a supply channel 11 of the short-circuit line 11 ' releasing throttle valve 20 as respective additional device the respective Flow cross section, wherein the respective short-circuit valve 10 each Thermostatic valve 1 directed to the expansion element 2 Druchbrechungen 21st arranged such that each short-circuit valve from a predetermined Opening stroke of the main valve 3, the throttle openings 19 in addition to each Warm-up valve acting throttle valve 20 closes.
  • each thermostatic valve 1 according to the invention with a cup-shaped throttle valve 20 is equipped as an additional device, wherein each throttle valve 20 in one of the pot wall 22 adjacent bottom region 23 angeomdete throttle openings 19 has.
  • the invention as a poppet valve designed, with a relatively small circumferential play led to the pot wall 22 arranged Short-circuit valve 10, the intended openings 21 closely adjacent a concentrically arranged guide bush 24.
  • thermostatic valve 1 of Figure 4 Compared with the thermostatic valve 1 of Figure 3 comprises the thermostatic valve 1 of Figure 4, the short-circuit valve 10 with a relatively small circumferential clearance to Topfwandung 22 guided sealing ring 25, which with a centrally arranged guide bushing 26 is connected via a cone portion 27 in connection, in an advantageous Add the effective flow to the transition area of the cone section 27 and guide bushing 26 arranged openings 21 directs.
  • the present invention improved direct arrival or flow around the expansion element 2 in short-circuit operation or with internal coolant circulation with over a throttled flow of increased coolant temperature is advantageously applicable in a thermostat 1 for map-controlled cooling, what the Expansion element 2 additionally equipped with an electric heater 31 is. This may be due to the increased in effectiveness according to the invention or rinsing of the expansion element operated advantageous energy saving become.
  • a preferred simple embodiment of an inventive from a Throttling valve 28 and a short-circuit valve 10 formed additional device shows Figure 5, wherein both valves 10, 28 are each dish-shaped.
  • the example on a housing extension 29 in a known manner via the control pin arranged on the machine-side Dehnstoffiatas arranged slidingly movable Valves 10, 28 are arranged movable relative to each other so that the Throttle valve 28 facing away from the expansion element on a short-circuit valve 10 on angeorndeten guide bushing 30 slides.
  • That associated with the inlet channel 11 Throttle valve 28 has arranged on a channel wall near subcircuit Throttle openings 19, whereas the short-circuit valve 10, in contrast, radially Inwardly near the guide bush 30 has arranged openings 21. This is for free flow around the peripheral edge of the short-circuit valve 10th via the openings 21 in addition a targeted flow of the expansion element along its housing extension 29 achieved with the advantage of rapid heating of the wax element-containing expansion element (Not shown).

Description

Die Erfindung bezieht sich gemäß dem Oberbegriff des Patentanspruches 1 auf ein Thermostatventil für den Kühlkreislauf einer Brennkraftmaschine, bei dem ein Dehnstoffelement ein Hauptventil eines äußeren Kühlmittelumlaufes regelt, und über den Öffnungshub des Hauptventiles gesteuert ein Kurzschlussventil einen mündungsseitigen Strömungsquerschnitt eines Zulaufkanals einer Kurzschlußleitung des inneren Kühlmittelumlaufes elastisch nachgiebig geführt verschließt, wobei einem Ventil eine Zusatzvorrichtung zur Lenkung einer wirksamen Kühlmittelströmung auf das Dehnstoffelement zugeordnet ist.The invention relates according to the preamble of claim 1 to a Thermostat valve for the cooling circuit of an internal combustion engine, in which a Expansion element regulates a main valve of an external coolant circulation, and via the opening stroke of the main valve, a short-circuit valve controls one Mouth-side flow cross section of a feed channel of a Short circuit line of the inner coolant circulation passed elastically yielding closes, with a valve, an additional device for steering a effective coolant flow is assigned to the expansion element.

Derartige Thermostatventile sind üblich und dienen bekanntlich in Serienmotoren der Steuerung/Regelung des jeweiligen Flüssigkeits-Kühlkreislaufes. Bei aufgrund von relativ kaltem Kühlmittel geschlossenem Hauptventil zum Vorlauf eines Kühlers im äußeren Kühlmittelumlauf ist das Dehnstoffelement im wesentlichen zumindest bis zum Öffnungsbeginn des Hauptventils über den inneren Kühlmittelumlauf erwärmt. Das dem Thermostat aus einem vom Kurzschlußventil offen gesteuerten Zulaufkanal der Kurzsschlußleitung des inneren Kühlmittelumlaufes zuströmende, erwärmte Kühlmittel ist gemäß der DE 31 38 368 A1 über im Kurzschlußventil angeordnete Öffnungen auf das Dehnstoffelement gelenkt zur Förderung der Regelgüte; weitere Maßnahmen zur Förderung der Regelgüte sind nicht vorgesehen. Such thermostatic valves are common and are known to be used in series engines the control / regulation of the respective liquid cooling circuit. At due from relatively cold coolant closed main valve to the flow of a radiator in the outer coolant circulation, the expansion element is substantially at least heated to the opening of the main valve via the inner coolant circulation. That the thermostat from a short-circuited valve open Inflow channel of the short-circuit line of the inner coolant circulation inflowing, heated coolant is arranged in the short-circuit valve according to DE 31 38 368 A1 Openings directed to the expansion element to promote the control quality; further measures to promote the control quality are not provided.

Ebenfalls eine Verbesserung der Regelgüte wird gemäß der DE 35 10 148 A1 durch eine dem Ventil im Strömungsverlauf nachgeordnete Kühlmittelleitvorrichtung erreicht; das Ventil selbst weist keine besonderen Merkmale zur Verbesserung der Regelgüte auf.Likewise, an improvement in the control quality is according to DE 35 10 148 A1 by a coolant flow device arranged downstream of the valve in the course of the flow reached; the valve itself has no special features to improve the Control quality on.

Der Erfindung liegt die Aufgabe zugrunde, einen Thermostaten der eingangs beschriebenen Bauart derart zu verbessern, daß bei im wesentlichen innerem Kühlmittelumlauf (Kurzschlußbetrieb) dessen Wirkung auf das Dehnstoffelement des Thermostatventils bei direkter Um- bzw. Anströmung gesteigert ist.The invention has for its object to provide a thermostat of the type described above To improve type such that at substantially inner coolant circulation (Short circuit operation) whose effect on the expansion element of the Thermostatic valve is increased in direct inflow or flow.

Diese Aufgabe ist mit dem Patentanspruch 1 gelöst, wobei gemäß der zu Grunde liegenden Idee dem Kurzschlussventil eine mehrteilige Zusatzvorrichtung zur Wirkungssteigerung der auf das Dehnstoffelement gelenkten Kühlmittel-Strömung zugeordnet ist, wobei ein erster Teil der Zusatzvorrichtung einem baulich gesonderten zweiten Teil der Zusatzvorrichtung im Strömungsweg des Kurzschlussstromes vorgeordnet ist.This object is achieved with the patent claim 1, wherein according to the basis lying idea the short-circuit valve a multipart accessory device for Increasing the effect of the coolant flow directed onto the expansion element is assigned, wherein a first part of the additional device a structural separate second part of the additional device in the flow path of Short-circuit current is arranged upstream.

Mit der Erfindung der Zusatzvorrichtung zur Lenkung einer in der Wirksamkeit verbesserten Kühlmittel-Strömung des inneren Kühlmittelumlaufes stromab des in einer Offenstellung befindlichen Kurzschlußventils auf das Dehnstoffelement ist für dieses durch eine gezielt konzentrische Umströmung einerseits und/oder durch eine gesteigerte Kühlmitteltemperatur des über Drosselöffnungen zuströmenden Kühlmittels andererseits eine verzögerte Erwärmung vermieden und mit dem damit rascheren Ansprechverhalten eine weiter verbesserte Regelgüte erzielt.With the invention of the additional device for steering one in the effectiveness improved coolant flow of the internal coolant circulation downstream of in an open position short-circuit valve on the expansion element is for this by a targeted concentric flow on the one hand and / or by a Increased coolant temperature of the inflowing via throttle openings Coolant on the other hand avoided a delayed heating and with it faster response achieved a further improved control performance.

Zwar könnte das Ansprechverhalten eines nach dem eingangs geschilderten Stand der Technik ungünstig umströmten Dehnstoffelementes mittels eines beispielsweise aus der DE-A 42 33 913 bekannten elektrischen Heizelementes ebenfalls verbessert werden, jedoch erübrigt sich dieser Aufwand in vorteilhafter Weise mit der Erfindung. Mit der Erfindung ist somit zum einen eine frühzeitige und intensive Erwärmung des Dehnstoffelementes aus dem inneren Kühlmittelumlauf erreicht, und andererseits kann eine für das Dehnstoffelement vorgesehene Heizeinrichtung für eine kennfeldgesteuerte Kühlung energiesparend betrieben werden. Although the response of a described after the beginning state the technology unfavorably flowed around the expansion element by means of an example from DE-A 42 33 913 known electric heating element also be improved, but this effort is unnecessary in an advantageous manner the invention. With the invention is thus on the one hand early and intensive Heating of the expansion element from the inner coolant circulation reaches, and on the other hand, a heater provided for the expansion element be operated energy saving for a map-controlled cooling.

Grundlage der Erfindung ist ein in der P 44 26 435 offenbarter Thermostat, der ein einen Zulaufkanal der Kurzschlußleitung druckbeaufschlagt elastisch nachgiebig geführt freigebendes Drosselventil mit Drosselöffnungen umfaßt, dem erfindungsgemäß eine dem Drosselventil dehnstoffseitig das Kurzschlußventil umschließende Düse von einfacher Gestaltung mit einer auf das Dehnstoffelement gerichteten Austrittsöffnung zugeordnet ist.Basis of the invention is disclosed in the P 44 26 435 thermostat, a an inlet channel of the short-circuit line pressurized elastically yielding Led releasing throttle valve with throttle openings which According to the invention a throttle valve expector side, the short-circuit valve enclosing nozzle of simple design with one on the expansion element associated with the directed outlet opening.

In einer anderen Ausgestaltung der Erfindung wird für einen weiteren, gemäß der P 44 26 435 gestalteten Thermostat vorgeschlagen, daß die Zusatzvorrichtung ein einen Zulaufkanal der Kurzschlußleitung druckbeaufschlagt elastisch nachgiebig geführt freigebendes Drosselventil mit Drosselöffnungen umfaßt, wobei das Kurzschlußventil auf das Dehnstoffelement gerichtete Druchbrechungen derart angeordnet aufweist, daß das Kurzschlußventil ab einem vorbestimmten Öffnungshub des Hauptventils die Drosselöffnungen des Drosselventils verschließt (Fig. 3, 4, 5).In another embodiment of the invention is for a further, according to the P 44 26 435 designed thermostat suggested that the additional device a an inlet channel of the short-circuit line pressurized elastically yielding guided releasing throttle valve with throttle openings, wherein the short-circuit valve arranged on the expansion element Druchbrechungen arranged such has, that the short-circuit valve from a predetermined opening stroke of the main valve closes the throttle openings of the throttle valve (FIGS. 3, 4, 5).

Das bekannte Drosselventil bewirkt mittels der Reduzierung des inneren Kühlmittelumlaufes eine schnellere Kühlmittelerwämung, die erfindungsgemäß zur Verbesserung der Regelgüte genutzt ist.The known throttle valve causes by means of the reduction of the internal Coolant circulation a faster coolant recovery, the invention for Improvement of the control quality is used.

Bevorzugte Ausbildungen der dritten erfindungsgemäßen Ausgestaltung sind in weiteren Ansprüchen beschrieben. Deren Vorteil ist die Möglichkeit einer relativ niedrigen Bauweise verbunden mit geringem Einbauraum.Preferred embodiments of the third embodiment according to the invention are in further claims. Their advantage is the possibility of a relative low construction combined with low installation space.

Anhand in der Zeichnung dargestellter, bevorzugter Beispiele ist die Erfindung beschrieben. Es zeigt

  • Figur 1 ein übliches Thermostatventil mit einer einem Zulaufkanal einer Kurzschlußleitung zugeordneten Düse als eine Zusatzvorrichtung,
  • Figur 2 ein erfindungsgemäß mit einem zusätzlichen Drosselventil ausgerüstetes Thermostatventil mit einer dem Drosselventil zugeordneten Düse als Teil der Zusatzvorrichtung, und
  • Figuren 3 und 4 jeweils ein Thermostatventil mit zusätzlichem Drosselventil als Teil der Zusatzvorrichtung und einem dessen Drosselöffnungen steuernden Kurzschlußventil mit zu den Drosselöffnungen versetzt angeordneten Durchbrechungen in Richtung des Dehnstoffelementes, sowie
  • Figur 5 ein jeweils als Tellenventil gestaltetes Kurzschluß-und Drosselventil.
    • Based on in the drawing illustrated, preferred examples, the invention is described. It shows
  • FIG. 1 shows a conventional thermostatic valve with a nozzle assigned to an inlet channel of a short-circuit line as an additional device,
  • Figure 2 shows an inventively equipped with an additional throttle valve thermostatic valve with a throttle valve associated nozzle as part of the additional device, and
  • Figures 3 and 4 each have a thermostatic valve with additional throttle valve as part of the additional device and a throttle valve whose openings controlling short-circuit valve offset to the throttle openings arranged apertures in the direction of the expansion element, and
  • Figure 5 each designed as a Tellenventil short-circuit and throttle valve.

    • Ein in den Figuren 1 bis 4 jeweils dargestelltes Thermostatventil 1 für den Kühlkreislauf einer nicht näher gezeigten, flüssigkeitsgekühlten Brennkraftmaschine umfaßt ein Dehnstoffelement 2, das als Stellmotor eines Hauptventils 3 in einem äußeren Kühlmittelumlauf der Temperaturregelegung des Kühlmittels dient. Das bei 4 maschinenseitig in einen Deckel 5 abgestützt angeordnete Dehnstoffelement 2 weist am entgegengesetzten Ende einen Steuerstift 6 auf, der über einen U-förmigen Bügel 7 mit dem Hauptventil 3 in Antriebsverbindung steht.A respectively shown in Figures 1 to 4 thermostatic valve 1 for the cooling circuit a not shown in detail, liquid-cooled internal combustion engine comprises an expansion element 2, which serves as a servomotor of a main valve 3 in a outer coolant circulation of the temperature control of the coolant is used. The at 4 machine side in a cover 5 supported arranged expansion element. 2 has at the opposite end to a control pin 6, which has a U-shaped Bracket 7 is in drive connection with the main valve 3.

    Der in einer balken- oder sternförmig gestalteten Traverse 8 geführte Antriebsbügel 7 weist einen den Steuerstift 6 aufnehmenden Fortsatz 9 auf, der am Außenumfang ein zum Antriebsbügel 7 hin elastisch nachgiebig verlagerbares Kurzsschlußventil 10 trägt. Diese Anordnung dient dazu, daß das Kurzschlußventil 10 in vorbestimmter Weise über den durch das Dehnstoffelement 2 bewirkten Öffnungshub des Hauptventils 3 gesteuert, einen Strömungsquerschnitt eines Zulaufkanals 11 einer Kurzschlußleitung 11' des inneren Kühlmittelumlaufes verschließt.The guided in a beam or star-shaped Traverse 8 drive handle 7 has a control pin 6 receiving extension 9, which on the outer circumference a to the drive bracket 7 towards elastically yielding short-circuit valve 10 carries. This arrangement serves to ensure that the short-circuit valve 10 in a predetermined Way over the caused by the expansion element 2 opening stroke controlled the main valve 3, a flow cross-section of a feed channel eleventh a short-circuit line 11 'of the inner coolant circulation closes.

    Das üblicherweise in Offenstellung von der Mündung 12 des Zulaufkanals 11 relativ gering beabstandete Kurzschlußventil 10 - wie z.B. in Figur 1- lenkt die Strömung des erwärmten Kühlmittels bei innerem Kühlmittelumlauf bzw. bei Kurzschlußbetrieb von einer auf kurzem Weg erreichten, direkten Beaufschlagung des Dehnstoffelementes 2 deutlich ab.The usually in the open position of the mouth 12 of the inlet channel 11 relative slightly spaced short-circuit valve 10 - such as e.g. in Figure 1- directs the flow of the heated coolant during internal coolant circulation or in short-circuit operation from a short way, direct impingement of the Dehnstoffelementes 2 clearly from.

    Zur Erzielung einer direkten An- bzw. Umströmung des Dehnstoffelementes 2 bei jedem Thermostatventil 1 gemäß den Figuren 1 bis 4 ist jeweils eine Zusatzvorrichtung zur Lenkung einer in der Wirksamkeit gesteigerten Kühlmittel-Strömung des inneren Kühlmittelumlaufes stromab des in einer Offenstellung befindlichen Kurzschlußventils 10 auf das Dehnstoffelement 2 vorgesehen.To achieve a direct arrival or flow around the expansion element 2 at Each thermostatic valve 1 according to the figures 1 to 4 is in each case an additional device for directing an increased efficiency of the coolant flow the inner coolant circulation downstream of the located in an open position Short-circuit valve 10 is provided on the expansion element 2.

    Bei dem in Figur 1 gezeigten üblichen Thermostatventil 1 mit dem an der Mündung 12 des Zulaufkanals 11 der Kurzschlußleitung 11' den Strömungsquerschnitt steuernden, tellerartigen Kurzschlußventil 10 ist der Mündung 12 des Zulaufskanals 11 eine das Kurzschlußventil 10 umschließende Düse 13 als Zusatzvorrichtung mit einer auf das Dehnstoffelement 2 gerichteten Ausströmöffnung 14 als Strömungslenkvorrichtung zugeordnet.In the usual thermostatic valve 1 shown in Figure 1 with the at the mouth 12 of the inlet channel 11 of the short-circuit line 11 ', the flow cross-section controlling, plate-like short-circuit valve 10 is the mouth 12 of the inlet channel 11 a the short-circuit valve 10 enclosing nozzle 13 as an additional device with a directed to the expansion element 2 outflow 14 as Associated with flow steering device.

    Bei dem in Figur 2 dargestellten Thermostatventil 1 ist erfindungsgemäß als Zusatzvorrichtung ein den Zulaufkanal 11 der Kurzschlußleitung 11' druckbeaufschlagt elastisch nachgiebig geführt freigebendes Drosselventil 16 mit Drosselöffnungen 15 vorgesehen, wobei dem auf dem Fortsatz 9 gleitbeweglich geführten Drosselventil 16 dehnstoffelementseitig eine das Kurzschlußventil 10 umschließende Düse 17 als weiteres Teil der Zusatzvorrichtung mit einer auf das Dehnstoffelement 2 gerichteten Austrittsöffnung 18 zugeordnet ist. Die Drosselöffnungen 15 in dem bekanntermaßen als Warmlaufventil dienenenden Drosselventil 16 sind ab einem vorbestimmten Öffnungshub des Hauptventils 3 durch das tellerartig gestaltete Kurzschlußventil 10 verschließbar.In the thermostatic valve 1 shown in Figure 2 according to the invention as an additional device an the inlet channel 11 of the short-circuit line 11 'pressurized elastically yielding guided releasing throttle valve 16 with throttle openings 15 provided, wherein the slidably guided on the extension 9 throttle valve 16 expansion element side, a nozzle 17 enclosing the short-circuit valve 10 as another part of the additional device with a on the expansion element. 2 directed outlet opening 18 is assigned. The throttle openings 15 in the known to serve as a warm-up valve throttle valve 16 are from a predetermined opening stroke of the main valve 3 by the plate-like design Short-circuit valve 10 closable.

    Auch bei den Thermostatventilen 1 der Figuren 3 und 4 bilden jeweils Drosselöffnungen 19 in einem den Zulaufkanal 11 der Kurzschlußleitung 11' druckbeaufschlagt freigebenden Drosselventil 20 als jeweilige Zusatzvorrichtung den jeweiligen Strömungsquerschnitt, wobei das jeweilige Kurzschlußventil 10 jedes Thermostatventils 1 auf das Dehnstoffelement 2 gerichtete Druchbrechungen 21 derart angeordnet aufweist, daß jedes Kurzschlußventil ab einem vorbestimmten Öffnungshub des Hauptventils 3 die Drosselöffnungen 19 jedes zusätzlich als Warmlaufventil wirkenden Drosselventils 20 verschließt.Also in the thermostatic valves 1 of Figures 3 and 4 each form throttle openings 19 pressurized in a supply channel 11 of the short-circuit line 11 ' releasing throttle valve 20 as respective additional device the respective Flow cross section, wherein the respective short-circuit valve 10 each Thermostatic valve 1 directed to the expansion element 2 Druchbrechungen 21st arranged such that each short-circuit valve from a predetermined Opening stroke of the main valve 3, the throttle openings 19 in addition to each Warm-up valve acting throttle valve 20 closes.

    Gemäß den Figuren 3 und 4 ist jedes Thermostatventil 1 erfindungsgemäß mit einem topfartig gestalteten Drosselventil 20 als Zusatzvorrichtung ausgerüstet, wobei jedes Drosselventil 20 in einem der Topfwandung 22 benachbarten Bodenbereich 23 angeomdete Drosselöffnungen 19 aufweist.According to Figures 3 and 4, each thermostatic valve 1 according to the invention with a cup-shaped throttle valve 20 is equipped as an additional device, wherein each throttle valve 20 in one of the pot wall 22 adjacent bottom region 23 angeomdete throttle openings 19 has.

    Bei dem Thermostatventil 1 nach Figur 3 weist das erfindungsgemäß als Tellerventil gestaltete, mit relativ kleinem Umfangspiel zur Topfwandung 22 geführt angeordnete Kurschlußventil 10 die vorgesehenen Durchbrechungen 21 eng benachbart einer konzentrisch angeordneten Führungsbuchse 24 auf. Die nahe der Führungsbuchse 24, die der kippfreien gleitbeweglichen Anordnung des Kurzschlußventils 10 auf dem Fortsatz 9 dient, angeordneten Durchbrechungen 21 von entsprechendem Querschnitt sind auf diese Weise von den nahe der Topfwandung 22 vorgesehenen Drosselöffnungen 19 von entsprechendem Strömungsquerschnitt ausreichend radial beabstandet, so daß das Kurzschlußventil 10 stirnseitig mit einem äußeren Ringbereich die Drosselöffnungen 19 sicher verschließt, wie dies das mit strichlierten Linien dargestellte Kurzschlußventil 10 in Schließstellung veranschaulicht.In the thermostatic valve 1 according to Figure 3, the invention as a poppet valve designed, with a relatively small circumferential play led to the pot wall 22 arranged Short-circuit valve 10, the intended openings 21 closely adjacent a concentrically arranged guide bush 24. The near the Guide bush 24, the non-tilting sliding arrangement of the short-circuit valve 10 on the extension 9 is used, arranged openings 21 of corresponding cross section are in this way from the near the Topfwandung 22 provided throttle openings 19 of the corresponding flow cross-section sufficiently radially spaced, so that the short-circuit valve 10 with the front side an outer ring portion the throttle openings 19 closes securely, like this the short-circuit valve 10 shown in dashed lines in the closed position illustrated.

    Gegenüber dem Thermostatventil 1 der Figur 3 umfaßt beim Thermostatventil 1 der Figur 4 das Kurzschlußventil 10 einen mit relativ kleinem Umfangsspiel zur Topfwandung 22 geführten Dichtring 25, der mit einer zentrisch angeordneten Führungsbuchse 26 über einen Kegelabschnitt 27 in Verbindung steht, der in vorteilhafter Weise die wirksame Strömung zu im Übergangsbereich von Kegelabschnitt 27 und Führungsbuchse 26 angeordneten Durchbrechungen 21 lenkt.Compared with the thermostatic valve 1 of Figure 3 comprises the thermostatic valve 1 of Figure 4, the short-circuit valve 10 with a relatively small circumferential clearance to Topfwandung 22 guided sealing ring 25, which with a centrally arranged guide bushing 26 is connected via a cone portion 27 in connection, in an advantageous Add the effective flow to the transition area of the cone section 27 and guide bushing 26 arranged openings 21 directs.

    Die erfindungsgemäß verbesserte direkte An- bzw. Umströmung des Dehnstoffelementes 2 im Kurzschlußbetrieb bzw. bei innerem Kühlmittelumlauf mit über eine gedrosselte Strömung gesteigerter Kühlmitteltemperatur ist vorteilhaft anwendbar bei einem Thermostaten 1 zur kennfeldgesteuerten Kühlung, wofür das Dehnstoffelement 2 zusätzlich mit einer elektrischen Heizeinrichtung 31 ausgerüstet ist. Diese kann aufgrund der erfindungsgemäß in der Wirksamkeit gesteigerten An- bzw. Umspülung des Dehnstoffelementes vorteilhaft energiesparend betrieben werden.The present invention improved direct arrival or flow around the expansion element 2 in short-circuit operation or with internal coolant circulation with over a throttled flow of increased coolant temperature is advantageously applicable in a thermostat 1 for map-controlled cooling, what the Expansion element 2 additionally equipped with an electric heater 31 is. This may be due to the increased in effectiveness according to the invention or rinsing of the expansion element operated advantageous energy saving become.

    Eine bevorzugt einfache Ausgestaltung einer erfindungsgemäß aus einem Drosselventil 28 und einem Kurzschlußventil 10 gebildeten Zusatzvorrichtung zeigt Figur 5, wobei beide Ventile 10, 28 jeweils tellerartig gestaltet sind. Die beispielsweise auf einem Gehäusefortsatz 29 eines in bekannter Weise über den Steuerstift maschinenseitig abgestützten Dehnstoffelementes schiebebeweglich angeordneten Ventile 10, 28 sind relativ zueinander derart beweglich angeordnet, daß das Drosselventil 28 auf einer am Kurzschlußventil 10 vom Dehnstoffelement abgewandt angeorndeten Führungsbuchse 30 gleitet. Das dem Zulaufkanal 11 zugeordnete Drosselventil 28 weist auf einem kanalwandnahen Teilkreis angeordnete Drosselöffnungen 19 auf, wogegen das Kurzschlußventil 10 demgegenüber radial einwärts nahe der Führungsbuchse 30 angeordnete Durchbrechungen 21 aufweist. Damit ist zur freien Umströmung des Umfangsrandes des Kurzschlußventils 10 über die Durchbrechungen 21 zusätzlich eine gezielte Anströmung des Dehnstoffelementes entlang seines Gehäusefortsatzes 29 erzielt mit dem Vorteil einer schnellen Erwärmung des ein Wachselement beinhaltenden Dehnstoffelementes (nicht gezeigt).A preferred simple embodiment of an inventive from a Throttling valve 28 and a short-circuit valve 10 formed additional device shows Figure 5, wherein both valves 10, 28 are each dish-shaped. The example on a housing extension 29 in a known manner via the control pin arranged on the machine-side Dehnstoffelementes arranged slidingly movable Valves 10, 28 are arranged movable relative to each other so that the Throttle valve 28 facing away from the expansion element on a short-circuit valve 10 on angeorndeten guide bushing 30 slides. That associated with the inlet channel 11 Throttle valve 28 has arranged on a channel wall near subcircuit Throttle openings 19, whereas the short-circuit valve 10, in contrast, radially Inwardly near the guide bush 30 has arranged openings 21. This is for free flow around the peripheral edge of the short-circuit valve 10th via the openings 21 in addition a targeted flow of the expansion element along its housing extension 29 achieved with the advantage of rapid heating of the wax element-containing expansion element (Not shown).

    Claims (6)

    1. A thermostat valve for the cooling circuit of an internal combustion engine,
      wherein an expansion element (2) controls a main valve (3) of an external coolant circuit and
      via the opening stroke of the main valve (3), a short-circuit valve (10), guided so as to be resiliently yielding, in controlled manner closes a flow cross-section at the mouth of an inlet duct (11) of a short-circuit line (11') belonging to the internal coolant circuit, wherein
      an additional device for directing an efficient coolant flow on to the expansion element (2) is associated with a valve (3, 10),
      characterised in that
      a part of the additional device in the form of a throttle valve (16, 20, 28) with throttle openings (15, 19) is associated with and upstream of the short-circuit valve (10) and when pressurised yields resiliently, is guided and uncovers the mouth (12) of the inlet duct (11) of the short-circuit line (11'), wherein
      coolant flowing through the throttle openings (15, 19) closing the short-circuit valve (10) is directed on to the expansion element (2) through at least one opening (18, 21) in another part (17, 10) of the additional device downstream of the throttle valve (16, 20, 28).
    2. A thermostat valve according to claim 1, characterised in that
      the additional device comprises a throttle valve (16) with throttle openings (15) which under pressure yields resiliently and in guided manner uncovers an inlet duct (11) of the short-circuit line (11'), and
      also comprises a nozzle (17) associated with the throttle valve (16) on the side facing the expansion element and surrounding the short-circuit valve (10) and formed with an outlet opening (18) directed towards the expansion element (2) (Figure 2).
    3. A thermostat valve according to claim 1, characterised in that
      the additional device comprises a throttle valve (20, 28) with throttle openings (19) which yields resiliently under pressure and in guided manner uncovers an inlet duct (11) of the short-circuit line (11') and
      also has apertures (21) in the short-circuit valve (10) directed towards the expansion element (2) and arranged so that
      above a preset opening stroke of the main valve (3), the short-circuit valve (10) closes the throttle openings (19) of the respective throttle valve (20, 28) (Figures 3, 4, 5).
    4. A thermostat valve according to claim 4, characterised in that
      a pot-shaped throttle valve (20) in the additional device has throttle openings (19) disposed in a base region (23) adjoining the pot wall (22) and
      the short-circuit valve (10), which is a disc valve guided with relatively small peripheral clearance between it and the pot wall (22), has apertures (21) disposed near a concentric guide sleeve (24) (Figure 3).
    5. A thermostat valve according to claim 4, characterised in that
      a pot-shaped throttle valve (20) in the additional device has throttle openings (19) disposed in a base region (23) near the pot wall (22), and
      the short-circuit valve (10) has a sealing ring (25) guided with relatively small peripheral clearance between it and the pot wall (22) and
      connected to a central guide bush (26) via a conical portion (27) which
      guides the effective flow to apertures (21) disposed in the transition region between the conical portion (27) and the guide bush (26).
    6. A thermostat valve according to one or more of claims 1 to 6,
      characterised in that
      the expansion element (2) is equipped with an additional heating device (31).
    EP96115636A 1995-10-05 1996-09-30 Thermostatic valve for the cooling circuit of an internal combustion engine Expired - Lifetime EP0767299B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19537068A DE19537068A1 (en) 1995-10-05 1995-10-05 Thermostatic valve for the cooling circuit of an internal combustion engine
    DE19537068 1995-10-05

    Publications (3)

    Publication Number Publication Date
    EP0767299A2 EP0767299A2 (en) 1997-04-09
    EP0767299A3 EP0767299A3 (en) 1998-08-19
    EP0767299B1 true EP0767299B1 (en) 2003-07-30

    Family

    ID=7774070

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96115636A Expired - Lifetime EP0767299B1 (en) 1995-10-05 1996-09-30 Thermostatic valve for the cooling circuit of an internal combustion engine

    Country Status (3)

    Country Link
    EP (1) EP0767299B1 (en)
    DE (2) DE19537068A1 (en)
    ES (1) ES2203663T3 (en)

    Families Citing this family (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE19824422A1 (en) * 1998-05-30 1999-12-02 Bayerische Motoren Werke Ag Thermostat valve for coolant circuit of internal combustion engine
    DE10253469A1 (en) * 2002-11-16 2004-05-27 Daimlerchrysler Ag Thermostatic valve for a combustion engine cooling system has electrically heated wax cartridge element to control valve operation
    FR2927660B1 (en) * 2008-02-14 2010-02-12 Peugeot Citroen Automobiles Sa ENGINE COOLING CIRCUIT

    Family Cites Families (13)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JPS5148529U (en) * 1974-10-08 1976-04-12
    DE2758054A1 (en) * 1977-12-24 1979-07-05 Hansa Metallwerke Ag Thermostatic expansion element for hot and cold water mixing - has longer stroke by using two identical elements joined by connecting rod
    JPS5620879A (en) * 1979-07-25 1981-02-26 Toyota Motor Corp Thermosensitive valve
    DE3138368C2 (en) * 1981-09-26 1983-07-28 Daimler-Benz Ag, 7000 Stuttgart "Thermostatically controlled valve in the cooling circuit of liquid-cooled internal combustion engines"
    JPS59200011A (en) * 1983-04-27 1984-11-13 Honda Motor Co Ltd Engine cooling device
    JPS6095126A (en) * 1983-10-28 1985-05-28 Mazda Motor Corp Engine coolant temperature control device
    DE3510148A1 (en) * 1984-12-14 1986-06-26 Daimler-Benz Ag, 7000 Stuttgart Cooling circuit of a liquid-cooled internal combustion engine
    DE4233913C2 (en) * 1992-10-08 2003-04-30 Behr Thermot Tronik Gmbh Electrically heated thermostatic valve for a coolant circuit of an internal combustion engine
    DE4325975C9 (en) * 1993-08-03 2010-01-07 Behr Thermot-Tronik Gmbh thermostatic valve
    JPH07139350A (en) * 1993-11-12 1995-05-30 Giichi Kuze Cooling system for internal combustion engine
    GB2290123B (en) * 1994-06-09 1997-10-29 Rover Group A combined bypass and thermostat assembly
    DE29505992U1 (en) * 1995-04-06 1995-06-01 Wahler Gmbh & Co Gustav Thermostatic valve
    DE19545081A1 (en) * 1995-12-04 1997-06-05 Behr Thomson Dehnstoffregler Thermostatic valve for coolant of fluid-cooled internal combustion engine

    Also Published As

    Publication number Publication date
    EP0767299A3 (en) 1998-08-19
    DE19537068A1 (en) 1997-04-10
    ES2203663T3 (en) 2004-04-16
    EP0767299A2 (en) 1997-04-09
    DE59610625D1 (en) 2003-09-04

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