EP0165395B1 - Control valve for the cooling medium circuit of an internal combuston engine - Google Patents

Control valve for the cooling medium circuit of an internal combuston engine Download PDF

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Publication number
EP0165395B1
EP0165395B1 EP85104377A EP85104377A EP0165395B1 EP 0165395 B1 EP0165395 B1 EP 0165395B1 EP 85104377 A EP85104377 A EP 85104377A EP 85104377 A EP85104377 A EP 85104377A EP 0165395 B1 EP0165395 B1 EP 0165395B1
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EP
European Patent Office
Prior art keywords
valve
accordance
regulating
regulating device
coolant
Prior art date
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Expired - Lifetime
Application number
EP85104377A
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German (de)
French (fr)
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EP0165395A2 (en
EP0165395A3 (en
Inventor
Roland Dipl.-Ing. Saur
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Behr Thomson Dehnstoffregler GmbH and Co
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Behr Thomson Dehnstoffregler GmbH and Co
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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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/13—Ambient 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/40—Oil 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/44—Outlet manifold 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/50—Temperature using two or more temperature sensors
    • 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
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • 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
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • F01P2025/62—Load
    • 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
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • F01P2025/64—Number of revolutions

Definitions

  • the invention relates to a control device for the coolant circuit of an internal combustion engine, in particular a motor vehicle, with a control valve which controls the distribution of the coolant flow from an outlet to an inlet of the internal combustion engine to a cooler arranged between the outlet and the inlet and to a short-circuit line bypassing the cooler regulates and which has two arranged in the coolant flow, axially spaced valve plates, which are assigned to two opposing valve seats and which together with the associated valve seats each control the connection of a valve chamber to the cooler and the short-circuit line, with a common valve carrier provided for both valve plates is, wherein one of the two valve plates is fixedly attached to the valve carrier and is directly loaded with a closing spring, and wherein the valve carrier is connected to an adjusting element, which na ch is led outside from the area of the coolant flow and which is acted upon by a drive element of an actuator which is controlled by a controller evaluating several operating parameters of the internal combustion engine.
  • a thermostatic valve which contains a thermostatic working element is usually provided in the coolant circuit of the internal combustion engines of motor vehicles.
  • the housing of the thermostatic working element contains a temperature-dependent expanding material and serves as a valve carrier, i.e. it is provided with two valve plates, one of which is assigned to the short-circuit line and the other to the connecting line to the cooler.
  • a piston serving as an adjusting element is arranged, which abuts a stationary abutment.
  • the housing of the thermostatic working element is arranged in the coolant flow. If the coolant exceeds a predetermined temperature, the piston is moved out of the housing, whereby the housing together with the valve disks is displaced.
  • a thermostatic valve has a predetermined valve characteristic.
  • the vacuum box is used to return the valve to the position in which it blocks the inlet to the cooler. In this operating state, a temperature of the coolant is reached which is above the usual operating temperature. If a predetermined maximum temperature is exceeded, then the Vacuum box connected to the atmosphere via a thermostatically controlled valve, so that the valve then releases the inlet to the cooler and cooling takes place.
  • the invention has for its object to provide a control device for the cooling water circuit of an internal combustion engine, which is simple, uses as many elements that have been tried and tested in practice and, above all, enables a quick response to a large number of operating parameters.
  • valve carrier and the adjusting element are not movable relative to one another by means of a temperature-dependent expansion material, but are rigidly connected to one another in order to set the valve positions assigned to the operating parameters directly, and in that the adjusting element or the drive element is arranged outside the area of the coolant flow Device for detecting the valve positions and for feedback is assigned to the controller.
  • This configuration creates a control device which contains a control valve, the structure of which essentially corresponds to the structure of a conventional thermostatic valve, but without a thermostatic working element being present.
  • the thermostatic working element which consists of a housing and a working piston which can be extended relative to the housing by means of a temperature-dependent expansion material, is replaced by a valve carrier which is rigidly connected to the adjusting element and which is adjusted directly and exclusively via an actuator.
  • the actuator can or the like depending on various influences of the engine control or engine load. can be controlled, wherein the control valve can be adjusted very quickly, ie the control device enables very fast control cycles.
  • control valve according to the invention Nevertheless, a new design of the overall structure of the control valve is not necessary, since in the control valve according to the invention the structure is essentially realized in accordance with the conventional thermostatic valves. It is therefore also readily possible to install a control device according to the invention in existing cooling circuits of internal combustion engines in order to be able to control them in order to achieve improved combustion.
  • the drawing shows a control device according to the invention with a control valve shown in section.
  • control device shown in the drawing is explained using the example of a so-called distribution control.
  • control device can also be used in a so-called mixed control, in which the structure of the control valve itself is then identical, while only the directions of the coolant flows are somewhat changed.
  • a valve chamber 22 is provided in a housing 17, into which a channel 21 opens, with the outlet of the cooling water supply an internal combustion engine, not shown, is connected.
  • a channel 13 branches off from the valve chamber 22 and leads directly via a short-circuit line (not shown) to the inlet of the cooling water duct of the internal combustion engine.
  • the valve chamber 22 is covered by a housing part 8, which is provided with a connecting piece 9, to which a connecting line leading to a cooler, not shown, is connected, the outlet of which is in turn connected to the inlet of the cooling water duct of the internal combustion engine, not shown. Both the channel 13 and the connecting piece 9 are each assigned a valve.
  • the valve belonging to the connecting piece 9 is formed from a valve plate 5 and a conical valve seat 16 of the housing part 8.
  • the valve assigned to the channel 13 consists of a valve plate 6 and the mouth of this channel 13.
  • the channel 21 opens into the valve chamber 22 between the two valves mentioned.
  • valve disk 5 is firmly pressed onto an annular collar 25 of a valve carrier 1 with a passage.
  • the valve disk 5 is supported with its passage against an axial stop 26 of the valve carrier 1.
  • the valve plate 5 is loaded with a closing spring 12, which is designed as a conical helical spring and the other end of which is supported against an attachment of the housing 17 in the region of the mouth of the channel 13.
  • the closing spring 12 loads the valve plate 5 in the closing direction and presses it against the valve seat 16.
  • the valve plate 6 is guided with a passage on a bolt-shaped extension 23 of the valve carrier 1 with a sliding guide. It is pressed by means of a compression spring 14 against a stop 15 located at the end of the bolt-shaped extension 23.
  • the compression spring surrounds the essentially cylindrical valve carrier 1 and is supported on the annular collar 25, on which the passage of the valve plate 5 is pressed.
  • valve carrier 1 has a shape which corresponds to the shape of the housing of a thermostatic working element of a thermostatic valve. This shape has been chosen in particular to show the corresponding correspondence with a thermostatic valve. Of course, a different design can be selected for the valve carrier 1. in contrast to the housing of a thermostatic working element, it does not absorb any expansion material.
  • a rod 2 is rigidly attached to the valve carrier 1 in the axial extension thereof.
  • the rod 2 penetrates the housing part 8 having the connecting piece 9 in a guide 7 and protrudes outwards from this housing part 8.
  • the guide 7 consists of a bore in the housing part 8 and a screwed-in insert 20.
  • the insert 20 also holds a sealing element 19, in particular an O-ring surrounding the rod 2.
  • a ball 24 is inserted, which is opposite a drive cam 3.
  • the drive cam 3 is arranged on a drive shaft 11 of an electric motor 4, the drive shaft 11 running transversely to the axis of the rod 2 and the valve carrier 1.
  • the cam 3 has an eccentric shape with respect to the drive shaft 11.
  • the electric motor 4, which has, for example, a self-locking gear, is attached to a holder 10 attached to the housing part 8.
  • the electric motor is provided with connections 18, to which a controller 28 is connected, via which the drive of the drive shaft 11 and thus the adjustment of the valve carrier 1 via the drive cam 3 and the Rod 2 is controlled.
  • the controller input is connected to a number of signal transmitters, which are indicated by arrows and which, for example, the coolant temperature, the outside temperature, the load on the internal combustion engine, the torque or the speed of the internal combustion engine, the exhaust gas values and the exhaust gas temperature, the negative pressure in the intake manifold, the oil temperature or the like . Detect and depending on this, regulate the operating temperature of the engine by regulating the cooling in order to optimize the operation of the internal combustion engine. Since the valve carrier 1 with the valve disks 5 and 6 is driven directly by the electric motor 4, this results in fast control with relatively short control cycles.
  • a feedback potentiometer 27 is also connected to the controller 28, which is attached to the outside of the housing 8 and which is adjusted by the part of the rod 2 projecting outwards. This feedback potentiometer 27 reports the respective valve position, ie the position of the valve support 1, to the controller 28. Of course, other devices for reporting the valve position are also possible, for example a rotary potentiometer acting on the drive element 3.
  • actuators which have a translatory movement and transmit this directly to the rod 2.
  • the drive means of the actuator can also be provided instead of the electric motor, for example actuators which have a translatory movement and transmit this directly to the rod 2.
  • the drive cam 3 can be provided with a dovetail-shaped groove following the eccentric cam profile, in which the rod 2 then engages with a hammer-head-like end.
  • a pinion on the drive shaft 11 of the electric motor 4 which engages in a rack-like toothing of the rod.
  • the rod 2 it is possible to provide the rod 2 with a thread in the area lying outside the housing part 8, onto which a nut which is drivable by the actuator and is secured against axial movement is screwed. In this case the rod must be secured against rotation. It is also possible to accommodate translations or reductions in these drive elements.
  • the closing spring 12 can also be omitted.
  • the valve plate 5 is designed as a valve slide, to which a slide valve seat is then assigned. Care must then be taken that sufficient radial guidance is provided for the valve support 1 and the rod 2 if the closing spring 12 is omitted, which can be done, for example, by extending the guide 7.
  • valve plate 6 can also be designed as a valve spool, to which a slide valve seat of the channel 13 is then assigned.
  • the compression spring 14 can also be omitted.

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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)

Description

Die Erfindung betrifft eine Regeleinrichtung für den Kühlmittelkreislauf eines Verbrennungsmotors,insbesondere eines Kraftfahrzeuges, mit einem Regelventil, das die Verteilung der von einem Austritt zu einem Eintritt des Verbrennungsmotors geführten Kühlmittelströmung auf einen zwischen dem Austritt und dem Eintritt angeordneten Kühler und auf eine den Kühler umgehende Kurzschlußleitung regelt und das zwei in der Kühlmittelströmung angeordnete, in axialem Abstand angebrachte Ventilteller aufweist, die zwei einander gegenüberliegenden Ventilsitzen zugeordnet sind und die jeweils zusammen mit den zugehörigen Ventilsitzen die Verbindung einer Ventilkammer zum Kühler und zur Kurzschlußleitung steuern, wobei für beide Ventilteller ein gemeinsamer Ventilträger vorgesehen ist, wobei einer der beiden Ventilteller an dem Ventilträger fest angebracht und mit einer Schließfeder unmittelbar belastete ist, und wobei der Ventilträger mit einem Verstellelement verbunden ist, das nach außen aus dem Bereich der Kühlmittelströmung herausgeführt ist und an das ein Antriebselement eines Stellgliedes angreift, das von einem mehrere Betriebsparameter des Verbrennungsmotors auswertenden Regler gesteuert ist.The invention relates to a control device for the coolant circuit of an internal combustion engine, in particular a motor vehicle, with a control valve which controls the distribution of the coolant flow from an outlet to an inlet of the internal combustion engine to a cooler arranged between the outlet and the inlet and to a short-circuit line bypassing the cooler regulates and which has two arranged in the coolant flow, axially spaced valve plates, which are assigned to two opposing valve seats and which together with the associated valve seats each control the connection of a valve chamber to the cooler and the short-circuit line, with a common valve carrier provided for both valve plates is, wherein one of the two valve plates is fixedly attached to the valve carrier and is directly loaded with a closing spring, and wherein the valve carrier is connected to an adjusting element, which na ch is led outside from the area of the coolant flow and which is acted upon by a drive element of an actuator which is controlled by a controller evaluating several operating parameters of the internal combustion engine.

In dem Kühlmittelkreislauf der Verbrennungsmotoren von Kraftfahrzeugen ist üblicherweise ein Thermostatventil vorgesehen, das ein thermostatisches Arbeitselement enthält. Das Gehäuse des thermostatischen Arbeitselementes enthält einen sich temperaturabhängig ausdehnenden Dehnstoff und dient als Ventilträger, d.h. er ist mit zwei Ventiltellern versehen, von denen einer der Kurzschlußleitung und der andere der Verbindungsleitung zu dem Kühler zugeordnet ist. In dem Gehäuse des thermostatischen Arbeitselementes ist ein als Verstellelement dienender Kolben angeordnet, der an einem ortsfesten Widerlager anliegt. Das Gehäuse des thermostatischen Arbeitselementes ist in der Kühlmittelströmung angeordnet. Wenn das Kühlmittel eine vorgegebene Temperatur überschreitet, wird der Kolben aus dem Gehäuse ausgefahren, wodurch das Gehäuse mitsamt den Ventiltellern verschoben wird. Abhängig von der Auslegung des thermostatischen Arbeitselementes besitzt ein derartiges Thermostatventil eine vorgegebene Ventilcharakteristik.A thermostatic valve which contains a thermostatic working element is usually provided in the coolant circuit of the internal combustion engines of motor vehicles. The housing of the thermostatic working element contains a temperature-dependent expanding material and serves as a valve carrier, i.e. it is provided with two valve plates, one of which is assigned to the short-circuit line and the other to the connecting line to the cooler. In the housing of the thermostatic working element, a piston serving as an adjusting element is arranged, which abuts a stationary abutment. The housing of the thermostatic working element is arranged in the coolant flow. If the coolant exceeds a predetermined temperature, the piston is moved out of the housing, whereby the housing together with the valve disks is displaced. Depending on the design of the thermostatic working element, such a thermostatic valve has a predetermined valve characteristic.

Um die Ventilcharakteristik eines derartigen Thermostatventils verändern zu können und somit den Kühlmittelkreislauf nicht nur abhängig von der Temperatur des Kühlmittels zu regeln, ist es bekannt (DE-A 32 26 104), dem Arbeitskolben (Verstellelement) des Thermostatventils ein einstellbares Widerlager zuzuordnen, dessen Position über ein Stellglied veränderbar ist, das von einem Betriebsparameter des Verbrennungsmotors auswertenden Regler gesteuert ist. Dadurch wird es möglich, die Ventilcharakteristik abhängig von weiteren Regelgrößen außer der Temperatur des Kühlmittels zu verändern, wobei dieser Temperaturregelcharakteristik eine andere Regelcharakteristik überlagert wird. Bei dieser Bauart ist es besonders vorteilhaft, daß grundsätzlich der Aufbau des Thermostatventils, der sich seit vielen Jahren in der Praxis bewährt hat, nicht verändert wird. Es läßt sich insgesamt ein verbessertes Regelverhalten verwirklichen, dem allerdings gewisse Grenzen gesetzt sind. Diese Grenzen bestehen darin, daß das gesamte System relativ träge ist, so daß manche Betriebsparameter für die Veränderung der Ventilcharakteristik nicht ausgewertet werden können.In order to be able to change the valve characteristics of such a thermostatic valve and thus to regulate the coolant circuit not only depending on the temperature of the coolant, it is known (DE-A 32 26 104) to assign an adjustable abutment to the working piston (adjusting element) of the thermostatic valve, its position can be changed via an actuator which is controlled by a controller evaluating an operating parameter of the internal combustion engine. This makes it possible to change the valve characteristic as a function of further control variables in addition to the temperature of the coolant, a different control characteristic being superimposed on this temperature control characteristic. With this type of construction, it is particularly advantageous that the structure of the thermostatic valve, which has proven itself in practice for many years, is basically not changed. Overall, an improved control behavior can be realized which, however, have certain limits. These limits are that the entire system is relatively sluggish, so that some operating parameters for changing the valve characteristics cannot be evaluated.

Um eine Durchflußregelung in dem Kühlkreislauf unabhängig von einem Thermostatventil vornehmen zu können, ist es auch bekannt (US-A 43 99 776), zusätzlich zu dem Thermostatventil in der Verbindungsleitung zu dem Kühler ein Durchflußregelventil anzuordnen, das über ein Stellglied gesteuert wird. Damit wird jedoch der Aufwand wesentlich erhöht, während zum anderen der Einfluß des Thermostatventils auf die Regelung nicht ausgeschlossen ist.In order to be able to regulate the flow in the cooling circuit independently of a thermostatic valve, it is also known (US Pat. No. 4,399,776) to arrange a flow regulating valve in addition to the thermostatic valve in the connecting line to the cooler, which valve is controlled by an actuator. However, this considerably increases the effort, while on the other hand the influence of the thermostatic valve on the control is not excluded.

Es war auch bekannt (DE-A 33 02 768), in dem Kühlkreislauf eines Verbrennungsmotors anstelle eines Thermostatventils ein verstellbares Ventil einzusetzen. Dieses verstellbare Ventil, das in dem Zulauf zu einem Kühler des Kühlkreislaufes angeordnet ist, ist mittels einer Unterdruckdose schaltbar, die an das Ansaugrohr des Verbrennungsmotors angeschlossen ist, wobei hier ein Rückschlagventil und weitere Ventile zwischengeschaltet sind, über die auch ein Anschluß der Unterdruckdose an die Atmosphäre möglich ist. Diese weiteren Ventile werden mittels eines thermostatischen Arbeitselementes so gesteuert, daß sich mehrere Betriebszustände ergeben. Solange die Kühlflüssigkeit unter einer Mindesttemperatur liegt, bleibt das Ventil geschlossen, so daß die Kühlflüssigkeit relativ schnell aufgeheizt wird. Wird eine Mindesttemperatur überschritten, so wird bei erhöhter Last der Zulauf zum Kühler freigegeben, so daß eine Kühlung durchgeführt wird. Wird bei dieser Mindesttemperatur jedoch mit Niedriglast oder Leerlauf gefahren, so wird über die Unterdruckdose das Ventil wieder in die Stellung gebracht, in der es den Zulauf zu dem Kühler sperrt. In diesem Betriebszustand wird eine Temperatur des Kühlmittels erreicht, die über der üblichen Betriebstemperatur liegt. Wenn dabei eine vorgegebene Maximaltemperatur überschritten wird, so wird dann die Unterdruckdose über ein thermostatisch gesteuertes Ventil mit der Atmosphäre verbunden, so daß dann das Ventil den Zulauf zum Kühler wieder freigibt und eine Kühlung erfolgt.It was also known (DE-A 33 02 768) to use an adjustable valve in the cooling circuit of an internal combustion engine instead of a thermostatic valve. This adjustable valve, which is arranged in the inlet to a cooler of the cooling circuit, can be switched by means of a vacuum socket which is connected to the intake pipe of the internal combustion engine, with a check valve and further valves being interposed here, via which a connection of the vacuum socket to the Atmosphere is possible. These further valves are controlled by means of a thermostatic working element so that there are several operating states. As long as the coolant is below a minimum temperature, the valve remains closed, so that the coolant is heated up relatively quickly. If a minimum temperature is exceeded, the inflow to the cooler is released with increased load, so that cooling is carried out. However, if driving at this minimum temperature with low load or idling, the vacuum box is used to return the valve to the position in which it blocks the inlet to the cooler. In this operating state, a temperature of the coolant is reached which is above the usual operating temperature. If a predetermined maximum temperature is exceeded, then the Vacuum box connected to the atmosphere via a thermostatically controlled valve, so that the valve then releases the inlet to the cooler and cooling takes place.

Der Erfindung liegt die Aufgabe zugrunde, eine Regeleinrichtung für den Kühlwasserkreislauf eines Verbrennungsmotors zu schaffen, die einfach aufgebaut ist, möglichst viele in der Praxis bewährte Elemente benutzt und die vor allem ein schnelles Ansprechen auf eine Vielzahl von Betriebsparametern ermöglicht.The invention has for its object to provide a control device for the cooling water circuit of an internal combustion engine, which is simple, uses as many elements that have been tried and tested in practice and, above all, enables a quick response to a large number of operating parameters.

Diese Aufgabe wird dadurch gelöst, daß der Ventilträger und das Verstellelement nicht mittels eines temperaturabhängigen Dehnstoffs relativ zueinander bewegbar, sondern starr miteinander verbunden sind, um die den Betriebsparametern zugeordneten Ventilpositionen direkt einzustellen, und daß dem Verstellelement oder dem Antriebselement eine außerhalb des Bereichs der Kühlmittelströmung angeordnete Einrichtung zum Erfassen der Ventilpositionen und zum Rückmelden zu dem Regler zugeordnet ist.This object is achieved in that the valve carrier and the adjusting element are not movable relative to one another by means of a temperature-dependent expansion material, but are rigidly connected to one another in order to set the valve positions assigned to the operating parameters directly, and in that the adjusting element or the drive element is arranged outside the area of the coolant flow Device for detecting the valve positions and for feedback is assigned to the controller.

Durch diese Ausbildung wird eine Regeleinrichtung geschaffen, die ein Regelventil enthält, dessen Aufbau im wesentlichen dem Aufbau eines üblichen Thermostatventils entspricht, ohne daß jedoch ein thermostatisches Arbeitselement vorhanden ist. Das thermostatische Arbeitselement, das aus einem Gehäuse und einem relativ zu dem Gehäuse mittels eines temperaturabhängigen Dehnstoffs ausfahrbaren Arbeitskolben besteht, ist durch einen Ventilträger ersetzt, der starr mit dem Verstellelement verbunden ist und der direkt und ausschließlich über ein Stellglied verstellt wird. Das Stellglied kann abhängig von vielfältigen Einflüssen der Motorregelung oder Motorbelastung o.dgl. gesteuert werden, wobei ein sehr schnelles Verstellen des Regelventils durchgeführt werden kann,d.h. die Regeleinrichtung sehr schnelle Regelspiele ermöglicht. Trotzdem ist eine prinzipielle neue Konstruktion des Gesamtaufbaus des Regelventils nicht notwendig, da bei dem erfindungsgemäßen Regelventil im wesentlichen der Aufbau entsprechend den konventionellen Thermostatventilen verwirklicht wird. Es ist deshalb auch ohne weiteres möglich, eine erfindungsgemäße Regeleinrichtung in vorhandene Kühlkreisläufe von Verbrennungsmotoren einzubauen, um diese zur Erzielung einer verbesserten Verbrennung regeln zu können.This configuration creates a control device which contains a control valve, the structure of which essentially corresponds to the structure of a conventional thermostatic valve, but without a thermostatic working element being present. The thermostatic working element, which consists of a housing and a working piston which can be extended relative to the housing by means of a temperature-dependent expansion material, is replaced by a valve carrier which is rigidly connected to the adjusting element and which is adjusted directly and exclusively via an actuator. The actuator can or the like depending on various influences of the engine control or engine load. can be controlled, wherein the control valve can be adjusted very quickly, ie the control device enables very fast control cycles. Nevertheless, a new design of the overall structure of the control valve is not necessary, since in the control valve according to the invention the structure is essentially realized in accordance with the conventional thermostatic valves. It is therefore also readily possible to install a control device according to the invention in existing cooling circuits of internal combustion engines in order to be able to control them in order to achieve improved combustion.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung der in der Zeichnung dargestellten Ausführungsform und den Unteransprüchen.Further features and advantages of the invention result from the following description of the embodiment shown in the drawing and the subclaims.

Die Zeichnung zeigt eine erfindungsgemäße Regeleinrichtung mit einem im Schnitt dargestellten Regelventil.The drawing shows a control device according to the invention with a control valve shown in section.

Die in der Zeichnung dargestellte erfindungsgemäße Regeleinrichtung wird an dem Beispiel einer sogenannten Verteilregelung erläutert. Es ist für einen Fachmann jedoch ohne weiteres ersichtlich, daß die gleiche Regeleinrichtung auch bei einer sogenannten Mischregelung eingesetzt werden kann, bei welcher dann der Aufbau des Regelventils selbst identisch ist, während lediglich die Richtungen der Kühlmittelströmungen etwas abgeändert sind.The control device according to the invention shown in the drawing is explained using the example of a so-called distribution control. However, it is readily apparent to a person skilled in the art that the same control device can also be used in a so-called mixed control, in which the structure of the control valve itself is then identical, while only the directions of the coolant flows are somewhat changed.

Bei der dargestellten Ausführungsform, der sogenannten Verteilregelung, ist in einem Gehäuse 17 eine Ventilkammer 22 vorgesehen, in die ein Kanal 21 mündet, der mit dem Austritt der Kühlwasserführung eines nicht dargestellten Verbrennungsmotors verbunden ist. Von der Ventilkammer 22 zweigt ein Kanal 13 ab, der über eine nicht dargestellte Kurzschlußleitung direkt wieder zu dem Eintritt der Kühlwasserführung des Verbrennungsmotors führt. Die Ventilkammer 22 wird durch ein Gehäuseteil 8 abgedeckt, das mit einem Anschlußstutzen 9 versehen ist, an den eine zu einem nicht dargestellten Kühler geführte Verbindungsleitung angeschlossen ist, dessen Austritt seinerseits mit dem Eintritt der Kühlwasserführung des nicht dargestellten Verbrennungsmotors verbunden ist. Sowohl dem Kanal 13 als auch dem Anschlußstutzen 9 ist jeweils ein Ventil zugeordnet. Das zu dem Anschlußstutzen 9 gehörige Ventil wird aus einem Ventilteller 5 und einem kegelförmigen Ventilsitz 16 des Gehäuseteils 8 gebildet. Das dem Kanal 13 zugeordnete Ventil besteht aus einem Ventilteller 6 und der Mündung dieses Kanals 13. Der Kanal 21 mündet zwischen den beiden erwähnten Ventilen in die Ventilkammer 22.In the illustrated embodiment, the so-called distribution control, a valve chamber 22 is provided in a housing 17, into which a channel 21 opens, with the outlet of the cooling water supply an internal combustion engine, not shown, is connected. A channel 13 branches off from the valve chamber 22 and leads directly via a short-circuit line (not shown) to the inlet of the cooling water duct of the internal combustion engine. The valve chamber 22 is covered by a housing part 8, which is provided with a connecting piece 9, to which a connecting line leading to a cooler, not shown, is connected, the outlet of which is in turn connected to the inlet of the cooling water duct of the internal combustion engine, not shown. Both the channel 13 and the connecting piece 9 are each assigned a valve. The valve belonging to the connecting piece 9 is formed from a valve plate 5 and a conical valve seat 16 of the housing part 8. The valve assigned to the channel 13 consists of a valve plate 6 and the mouth of this channel 13. The channel 21 opens into the valve chamber 22 between the two valves mentioned.

Der Ventilteller 5 ist mit einem Durchzug auf einen Ringbund 25 eines Ventilträgers 1 fest aufgepreßt. Der Ventilteller 5 stützt sich dabei mit seinem Durchzug gegen einen axialen Anschlag 26 des Ventilträgers 1 ab. In Richtung zu dem Anschlag hin ist der Ventilteller 5 mit einer Schließfeder 12 belastet, die als eine kegelförmige Schraubenfeder ausgebildet ist und deren anderes Ende sich gegen einen Ansatz des Gehäuses 17 im Bereich der Mündung des Kanals 13 abstützt. Die Schließfeder 12 belastet den Ventilteller 5 in Schließrichtung und drückt ihn gegen den Ventilsitz 16 an.The valve disk 5 is firmly pressed onto an annular collar 25 of a valve carrier 1 with a passage. The valve disk 5 is supported with its passage against an axial stop 26 of the valve carrier 1. In the direction of the stop, the valve plate 5 is loaded with a closing spring 12, which is designed as a conical helical spring and the other end of which is supported against an attachment of the housing 17 in the region of the mouth of the channel 13. The closing spring 12 loads the valve plate 5 in the closing direction and presses it against the valve seat 16.

Der Ventilteller 6 ist mit einem Durchzug auf einem bolzenförmigen Ansatz 23 des Ventilträgers 1 mit einer Gleitführung geführt. Er wird mittels einer Druckfeder 14 gegen einen am Ende des bolzenförmigen Ansatzes 23 befindlichen Anschlag 15 angedrückt. Die Druckfeder umgibt den im wesentlichen zylindrischen Ventilträger 1 und stützt sich an dem Ringbund 25 ab, auf welchen der Durchzug des Ventiltellers 5 aufgepreßt ist.The valve plate 6 is guided with a passage on a bolt-shaped extension 23 of the valve carrier 1 with a sliding guide. It is pressed by means of a compression spring 14 against a stop 15 located at the end of the bolt-shaped extension 23. The compression spring surrounds the essentially cylindrical valve carrier 1 and is supported on the annular collar 25, on which the passage of the valve plate 5 is pressed.

Aus der vorausgegangenen Beschreibung und der Darstellung in der Zeichnung wird ersichtlich, daß der prinzipielle Aufbau des Regelventils, soweit er bisher erläutert ist, identisch mit einem üblichen Thermostatventil ist, d.h. soweit es die Anordnung der Kanäle 13 und 21, des Anschlußstitzens 9 und der Ventilteller 5 und 6 sowie der zugeordneten Ventilsitze auf dem Ventilträger 1 betrifft. Gleiches gilt für die Anordnung der Schließfeder 12 und der Druckfeder 14. Der Ventilträger 1 besitzt eine Gestalt, die der Gestalt des Gehäuses eines thermostatischen Arbeitselementes eines Thermostatventils entspricht. Diese Gestalt ist insbesondere gewählt worden, um die diesbezügliche Übereinstimmung mit einem Thermostatventil zu zeigen. Selbstverständlich kann jedoch eine andere Gestaltung für den Ventilträger 1 gewählt werden. da er im Gegensatz zu einem Gehäuse eines thermostatischen Arbeitselementes keinen Dehnstoff aufnimmt.From the preceding description and the illustration in the drawing it can be seen that the basic structure of the control valve, insofar as it has been explained so far, is identical to a conventional thermostatic valve, i.e. as far as the arrangement of the channels 13 and 21, the connection seat 9 and the valve plate 5 and 6 and the associated valve seats on the valve carrier 1 is concerned. The same applies to the arrangement of the closing spring 12 and the compression spring 14. The valve carrier 1 has a shape which corresponds to the shape of the housing of a thermostatic working element of a thermostatic valve. This shape has been chosen in particular to show the corresponding correspondence with a thermostatic valve. Of course, a different design can be selected for the valve carrier 1. in contrast to the housing of a thermostatic working element, it does not absorb any expansion material.

In Verlängerung der beiden axial übereinanderliegenden Ventilteller 5 und 6 ist in axialer Verlängerung des Ventilträgers 1 an diesem eine Stange 2 starr angebracht. Die Stange 2 durchdringt das den Anschlußstutzen 9 aufweisende Gehäuseteil 8 in einer Führung 7 und ragt nach außen aus diesem Gehäuseteil 8 heraus. Die Führung 7 besteht aus einer Bohrung des Gehäuseteils 8 und einem eingeschraubten Einsatz 20. Der Einsatz 20 hält außerdem ein Dichtungselement 19 insbesondere einen die Stange 2 umgebenden O-Ring.In extension of the two axially superimposed valve plates 5 and 6, a rod 2 is rigidly attached to the valve carrier 1 in the axial extension thereof. The rod 2 penetrates the housing part 8 having the connecting piece 9 in a guide 7 and protrudes outwards from this housing part 8. The guide 7 consists of a bore in the housing part 8 and a screwed-in insert 20. The insert 20 also holds a sealing element 19, in particular an O-ring surrounding the rod 2.

In das aus dem Gehäuseteil 8 herausragende Ende der Stange 2 ist eine Kugel 24 eingesetzt, der ein Antriebsnocken 3 gegenüberliegt. Der Antriebsnocken 3 ist auf einer Antriebswelle 11 eines Elektromotors 4 angeordnet, wobei die Antriebswelle 11 quer zur Achse der Stange 2 und des Ventilträgers 1 verläuft. Der Nocken 3 besitzt eine bezüglich der Antriebswelle 11 exzentrische Gestalt. Der Elektromotor 4, der beispiels-weise ein selbsthemmendes Getriebe aufweist, ist an einer an dem Gehäuseteil 8 angebrachten Halterung 10 befestigt. Der Elektromotor ist mit Anschlüssen 18 versehen, an die ein Regler 28 angeschlossen ist, über den der Antrieb der Antriebswelle 11 und damit die Verstellung des Ventilträgers 1 über den Antriebsnocken 3 und die Stange 2 gesteuert wird. Der Reglereingang ist an eine mit Pfeilen angedeute Vielzahl von Signalgebern angeschlossen, die beispielsweise die Kühlmitteltemperatur, die Außentemperatur, die Belastung des Verbrennungsmotors, das Drehmoment oder die Drehzahl des Verbrennungsmotors, die Abgaswerte und die Abgastemperatur, den Unterdruck im Saugrohr, die Öltemperatur o.dgl. erfassen und abhängig davon eine Regelung der Betriebstemperatur des Motors über die Regelung der Kühlung vorzunehmen, um den Betrieb des Verbrennungsmotors zu optimieren. Da der Ventilträger 1 mit den Ventiltellern 5 und 6 direkt von dem Elektromotor 4 angetrieben wird, ergibt sich eine schnelle Regelung mit relativ kurzen Regelspielen. An den Regler 28 ist ferner ein Rückführpotentiometer 27 angeschlossen, das außerhalb des Gehäuses 8 an diesem angebracht ist und das von dem nach außen ragenden Teil der Stange 2 verstellt wird. Dieses Rückführpotentiometer 27 meldet die jeweilige Ventilstellung, d.h. die Stellung des Ventilträgers 1, an den Regler 28. Selbstverständlich sind auch andere Einrichtungen zum Rückmelden der Ventilstellung möglich, z.B. ein an das Antriebselement 3 angreifendes Drehpotentiometer.In the end of the rod 2 protruding from the housing part 8, a ball 24 is inserted, which is opposite a drive cam 3. The drive cam 3 is arranged on a drive shaft 11 of an electric motor 4, the drive shaft 11 running transversely to the axis of the rod 2 and the valve carrier 1. The cam 3 has an eccentric shape with respect to the drive shaft 11. The electric motor 4, which has, for example, a self-locking gear, is attached to a holder 10 attached to the housing part 8. The electric motor is provided with connections 18, to which a controller 28 is connected, via which the drive of the drive shaft 11 and thus the adjustment of the valve carrier 1 via the drive cam 3 and the Rod 2 is controlled. The controller input is connected to a number of signal transmitters, which are indicated by arrows and which, for example, the coolant temperature, the outside temperature, the load on the internal combustion engine, the torque or the speed of the internal combustion engine, the exhaust gas values and the exhaust gas temperature, the negative pressure in the intake manifold, the oil temperature or the like . Detect and depending on this, regulate the operating temperature of the engine by regulating the cooling in order to optimize the operation of the internal combustion engine. Since the valve carrier 1 with the valve disks 5 and 6 is driven directly by the electric motor 4, this results in fast control with relatively short control cycles. A feedback potentiometer 27 is also connected to the controller 28, which is attached to the outside of the housing 8 and which is adjusted by the part of the rod 2 projecting outwards. This feedback potentiometer 27 reports the respective valve position, ie the position of the valve support 1, to the controller 28. Of course, other devices for reporting the valve position are also possible, for example a rotary potentiometer acting on the drive element 3.

In Abwandlung der dargestellten Ausführungsform, die nach einfacher Änderung der Kühlmittelführung als Mischregelung eingesetzt werden kann, können auch andere Arten von Stellgliedern anstelle des Elektromotors vorgesehen werden, beispielsweise Stellglieder, die direkt eine translatorische Bewegung haben und diese unmittelbar auf die Stange 2 übertragen. Darüber hinaus ist es auch möglich, die Antriebsmittel des Stellgliedes kraftschlüssig mit der Stange 2 zu verbinden. Beispielsweise ist es möglich, den Antriebsnocken 3 in Verstellrichtung der Stange 2 kraftschlüssig mit dieser zu verbinden. Hierzu kann beispielsweise der Antriebsnocken 3 mit einer dem exzentrischen Nockenverlauf folgenden schwalbenschwanzförmigen Nut versehen sein, in die dann die Stange 2 mit einem hammerkopfartigen Ende eingreift. Es ist auch möglich, auf der Antriebswelle 11 des Elektromotors 4 ein Ritzel anzuordnen, das in eine zahnstangenartige Verzahnung der Stange eingreift. Des weiteren ist es möglich, die Stange 2 in dem außerhalb des Gehäuseteils 8 liegenden Bereich mit einem Gewinde zu versehen, auf das eine von dem Stellglied antreibbare, gegen axiale Bewegung gesicherte Mutter aufgeschraubt ist. In diesem Fall muß die Stange gegen Drehbewegungen gesichert werden. Dabei ist es auch möglich, in diesen Antriebselementen Übersetzungen oder Untersetzungen unterzubringen.In a modification of the illustrated embodiment, which can be used as a mixed control after a simple change in the coolant guidance, other types of actuators can also be provided instead of the electric motor, for example actuators which have a translatory movement and transmit this directly to the rod 2. In addition, it is also possible to non-positively connect the drive means of the actuator to the rod 2. For example, it is possible to non-positively connect the drive cam 3 in the adjustment direction of the rod 2. For this purpose, for example, the drive cam 3 can be provided with a dovetail-shaped groove following the eccentric cam profile, in which the rod 2 then engages with a hammer-head-like end. It is also possible to arrange a pinion on the drive shaft 11 of the electric motor 4 which engages in a rack-like toothing of the rod. Furthermore, it is possible to provide the rod 2 with a thread in the area lying outside the housing part 8, onto which a nut which is drivable by the actuator and is secured against axial movement is screwed. In this case the rod must be secured against rotation. It is also possible to accommodate translations or reductions in these drive elements.

Wenn das Stellglied, beispielsweise der Elektromotor 4, über seine Antriebselemente in Verstellrichtung formschlüssig mit der Stange 2 verbunden ist, so kann auch die Schließfeder 12 entfallen. In diesem Fall kann in weiterer Ausgestaltung vorgesehen werden, daß der Ventilteller 5 als ein Ventilschieber ausgebildet ist, dem dann ein Schiebeventilsitz zugeordnet ist. Es muß dann dafür Sorge getragen werden, daß bei Wegfall der Schließfeder 12 eine ausreichende radiale Führung für den Ventilträger 1 und die Stange 2 vorgesehen ist, was beispielsweise durch Verlängerung der Führung 7 geschehen kann.If the actuator, for example the electric motor 4, is positively connected to the rod 2 in the adjustment direction via its drive elements, the closing spring 12 can also be omitted. In In this case, it can be provided in a further embodiment that the valve plate 5 is designed as a valve slide, to which a slide valve seat is then assigned. Care must then be taken that sufficient radial guidance is provided for the valve support 1 and the rod 2 if the closing spring 12 is omitted, which can be done, for example, by extending the guide 7.

In weiterer Ausgestaltung kann auch der Ventilteller 6 als ein Ventilschieber ausgeführt werden, dem dann ein Schiebeventilsitz des Kanals 13 zugeordnet wird. In diesem Fall, in welchem der Ventilteller 6 ortsfest an dem Ventilträger 1 angebracht wird, kann auch die Druckfeder 14 entfallen.In a further embodiment, the valve plate 6 can also be designed as a valve spool, to which a slide valve seat of the channel 13 is then assigned. In this case, in which the valve plate 6 is fixedly attached to the valve carrier 1, the compression spring 14 can also be omitted.

Claims (12)

  1. Regulating device for the circulation of the coolant of an internal-combustion motor, for a motor vehicle in particular, with a regulating valve which regulates the distribution of the flow of coolant led from an outlet to an intake of the internal-combustion motor to a radiator disposed between the outlet and the intake and to a short-circuit pipe surrounding the radiators, and which has two valve spring caps (5, 6) disposed in the flow of coolant, fixed at each end of an axial separation, which are associated with two oppositely positioned valve seats (16, 13) and which in each case, together with the associated valve seats, control the connection of a valve chamber (22) to the radiator and to the short-circuit pipe (13), whereby a common valve carrier (1) is provided for both valve spring caps, whereby one (5) of the two valve spring caps is solidly fixed to the valve carrier and is directly loaded by a closing spring (12), and whereby the valve carrier (1) is connected to a regulation element (2) which extends outwards from the area of the coolant flow and on which an actuation member (3) of a regulating member (4) engages, which is controlled by a regulator (28) which monitors several parameters of the functioning of the combustion motor, wherein the valve carrier (1) and the regulation element (2) are not movable relative to each other by means of a temperature-dependent expanding material, instead they are fixedly connected to each other in order to directly adjust to the valve positions associated with parameters of functioning, and a device (27) associated with the regulation element (2) or the actuating member (3), for recording the valve positions and communicating these back to the regulator (28), is disposed outside the area of the flow of coolant.
  2. Regulating device in accordance with claim 1, wherein a rod (2) which runs coaxially in relation to both valve spring caps (5, 6), is provided as a regulating element.
  3. Regulating device in accordance with claim 2, wherein the rod (2) is orientated in its axial direction into a guiding member (7).
  4. Regulating device in accordance with claim 3, wherein the housing member (8) is formed as a single piece with a connection pipe (9) for the connecting pipe going to the radiator.
  5. Regulating device in accordance with claim 4, wherein the housing member (8) is provided with incorporating member (10) for the mounting of the regulating member (4).
  6. Regulating device in accordance with any one of claims 1 to 4, wherein an electrical motor (4) is provided as a regulating member, the drive shaft (11) of which is connected to the regulating element (2) of the valve carrier (1) by means of a drive element (3) which converts a rotation movement into a translational movement.
  7. Regulating device in accordance any one of claims 1 to 6, wherein one of the valve spring caps (5) associated with the connection pipe (9) is provided with a closing spring (12) which loads this said valve spring cap in the direction of closing.
  8. Regulating device in accordance with any one of claims 1 to 7, wherein the valve spring cap (5) associated with the short-circuit pipe (13) is guided in a sliding movement on the valve carrier (1) and is held against an abutment (15) by a spring (14).
  9. Regulating device in accordance with any one of claims 1 to 8, wherein the regulating element (2) is pushed onto the actuation member (3), which can move in the direction of adjustment, by means of a spring (12).
  10. Regulating device in accordance with any one of claims 1 to 8, wherein a connection which is form-locking in the direction of adjustment is disposed between the regulating element (2) and the actuation member (3).
  11. Regulating device in accordance with any one of claims 1 to 10, wherein the valve spring cap associated with the connecting pipe (9) is developed as a valve slide which is associated with a gate valve seat.
  12. Regulating device in accordance with any one of claims 1 to 11, wherein the valve spring cap associated with the short-circuit pipe (13) is developed as a valve slide which is associated with a gate valve seat.
EP85104377A 1984-04-28 1985-04-11 Control valve for the cooling medium circuit of an internal combuston engine Expired - Lifetime EP0165395B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843415876 DE3415876A1 (en) 1984-04-28 1984-04-28 CONTROL VALVE FOR THE COOLANT CIRCUIT OF AN INTERNAL COMBUSTION ENGINE, ESPECIALLY A MOTOR VEHICLE
DE3415876 1984-04-28

Publications (3)

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EP0165395A2 EP0165395A2 (en) 1985-12-27
EP0165395A3 EP0165395A3 (en) 1986-06-18
EP0165395B1 true EP0165395B1 (en) 1994-07-13

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EP85104377A Expired - Lifetime EP0165395B1 (en) 1984-04-28 1985-04-11 Control valve for the cooling medium circuit of an internal combuston engine

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DE3810174C2 (en) * 1988-03-25 1996-09-19 Hella Kg Hueck & Co Device for regulating the coolant temperature of an internal combustion engine, in particular in motor vehicles
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FR2703730B1 (en) * 1993-04-05 1995-06-23 Vernet Sa Improvements to liquid cooling circuits for internal combustion engines.
DE29505992U1 (en) * 1995-04-06 1995-06-01 Gustav Wahler Gmbh U. Co, 73730 Esslingen Thermostatic valve
DE19728009C2 (en) * 1997-07-01 2003-10-02 Itw Henschel Gmbh Thermostatic valve for regulating the temperature of a coolant in a cooling system of an internal combustion engine
KR100330004B1 (en) * 1998-04-13 2002-05-09 윤종용 Flow rate control valve employing dc motor
DE19960190A1 (en) * 1999-12-14 2001-07-05 Bosch Gmbh Robert Control valve
DE10053699B4 (en) 2000-10-25 2010-11-11 Behr Thermot-Tronik Gmbh control valve
FR2955168B1 (en) * 2010-01-14 2012-02-10 Mann & Hummel Gmbh CONTROL VALVE FOR LIQUID CIRCULATION CIRCUIT
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Also Published As

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DE3587877D1 (en) 1994-08-18
DE3415876A1 (en) 1985-10-31
EP0165395A2 (en) 1985-12-27
EP0165395A3 (en) 1986-06-18

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