EP0940565B1 - Water pump for the cooling circuit of an internal combustion engine - Google Patents

Water pump for the cooling circuit of an internal combustion engine Download PDF

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Publication number
EP0940565B1
EP0940565B1 EP99101947A EP99101947A EP0940565B1 EP 0940565 B1 EP0940565 B1 EP 0940565B1 EP 99101947 A EP99101947 A EP 99101947A EP 99101947 A EP99101947 A EP 99101947A EP 0940565 B1 EP0940565 B1 EP 0940565B1
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EP
European Patent Office
Prior art keywords
water pump
pump
accordance
pump housing
feed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99101947A
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German (de)
French (fr)
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EP0940565A2 (en
EP0940565A3 (en
Inventor
Kai Lehmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daimler AG
Original Assignee
DaimlerChrysler AG
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Publication date
Application filed by DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP0940565A2 publication Critical patent/EP0940565A2/en
Publication of EP0940565A3 publication Critical patent/EP0940565A3/en
Application granted granted Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0022—Control, e.g. regulation, of pumps, pumping installations or systems by using valves throttling valves or valves varying the pump inlet opening or the outlet opening
    • 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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/406—Casings; Connections of working fluid especially adapted for liquid pumps
    • 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
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2070/00—Details

Definitions

  • the invention relates to a water pump for a Cooling circuit of an internal combustion engine according to the preamble of claim 1.
  • a water pump according to the preamble of claim 1 is known from DE 17 79 921 A. It is is a cooperating with a heating circulation pump Mixing valve. This is in an intake manifold, in the two other nozzles lead, a control body arranged in the form of a rotary valve, which about a planetary gear from an anchor of a Electric motor is driven.
  • DE 43 24 749 A1 discloses a control valve for a Cooling circuit described, with a radial inlet and three radial outlets, the distribution of the Coolant is done by a rotary valve.
  • From DE 44 38 552 C1 is a temperature control device for the cooling circuit of an internal combustion engine described which with actuators for a switching flap arranged on a switching shaft is provided.
  • the switching valve shaft lies in the Area of an imaginary wall line of the radiator return line or pump supply and in the junction area the short-circuit line in the pump supply line.
  • the switching flap is a temperature expansion element, a so-called wax cartridge, provided.
  • the present invention is based on the object a control device for the cooling circuit a To create internal combustion engine, which in a very compact design several links of the cooling circuit and several functions of setting and switching elements includes.
  • control valve according to the invention Due to the integration of the control valve according to the invention in the housing of the water pump becomes a very compact Achieved component, while at the same time by the Control valve with appropriate design several Switch positions are feasible, so that in case of need more control elements in a cooling and optionally a heating circuit of an internal combustion engine can be omitted. Not only can the various functions or switching positions but can also be realized the mechanical parts necessary for a control be received in the pump housing or accordingly be flanged to the pump housing.
  • the embodiment of the invention can be practical with a single device the entire circuit to Cooling and possibly also for heating for almost all cases occurring in practice are regulated.
  • the control valve are both individual openings controllable as well as mixed operations possible, so that to other control and regulating members in the cooling and heating circuit can be waived.
  • control valve Due to the design of the control valve as a rotary valve with the axial supply or discharge of the cooling medium and the inlet or outlet openings on the circumference
  • the pump housing results in no resulting Forces on the rotary valve, so that one with small Setting and holding forces for the rotary valve manages.
  • control valve only small Pressure losses on, at the same time high speeds.
  • the axial opening in the rotary valve is used for supply of cooling medium in its interior when the Rotary slide on the pressure side of the pumping device is arranged, in which case in the peripheral wall the pump housing arranged openings Outlet openings for forwarding the cooling medium represent.
  • the discharge takes place from cooling medium through the axial opening to the suction side the pump and, correspondingly, a supply to the rotary valve interior over the control opening through in the Peripheral wall of the pump housing arranged openings.
  • One possible embodiment when using a Actuator for the rotary valve is that next to the partial circuit for the radiator line another Partial circuit for a short circuit circulation line and a third subcircuit for a heat exchanger a heating circuit are provided. Alternatively or in combination can also be a partial cycle for an additional heater and / or an exhaust heat exchanger be provided.
  • the water pump shown in the figures is basically of known type, which is why only to the essential parts of the invention in more detail will be received.
  • the water pump may e.g. as Pumping device arranged in a pump housing 1 Centrifugal pump with one in a spiral channel 2 be arranged impeller 3.
  • the impeller 3 is in known manner by a drive motor 4 driven.
  • Alternatively to the drive via the drive motor 4 is also a mechanical drive over one of the Internal combustion engine driven belt drive, e.g. With a V-belt, conceivable for the water pump.
  • a control valve 5 arranged with a rotary valve 6 in sleeve form, wherein the longitudinal axis of the rotary valve coaxial with Pump longitudinal axis and the impeller 3 is located.
  • a axial collecting opening 7 of the rotary valve 6 forms a Inlet opening to the impeller 3 of the water pump.
  • a with a radiator not shown connected cooler line 8 opens with an inlet opening 9 in the Peripheral wall of the pump housing 1.
  • FIG Peripheral wall of the pump housing 1 additionally with two further inlet openings 10 and 11 are provided, the for further partial circuits of the cooling medium in the Cooling circuit are provided.
  • the collection port 7 side facing away from the rotary valve. 6 closed on the front and on this side too with a servomotor 12 for rotating the rotary valve Provided.
  • the rotary valve 6 is in its peripheral wall with a Control opening 13 provided. About the control port 13 takes place in dependence on the rotational position of the rotary valve 6 a connection from the inlet opening 9, 10 or 11 to the collection port 7 and thus a connection to the suction side of the impeller 3 of the water pump.
  • FIGs 4 to 7 are different control positions the control device 1 shown. So shows Fig. 4 shows the position in normal operation "cooling".
  • Fig. 5 is a first mixing operation in the warm-up phase of the engine during simultaneous heating operation, wherein the inlet opening 9 of the radiator line shut off and the inlet openings 10 and 11 for the Short circuit circulation line and for the heating circuit are open.
  • Fig. 6 shows a second mixing operation in the phase "warm-up and cooling", where the heating circuit is shut off.
  • FIG. 7 shows a third mixing operation in FIG Phase "heating and cooling", wherein the inlet opening 10th is shut off for the short circuit circuit line.
  • heating circuit can also be a second Short circuit, e.g. for the cylinder head, provided his.
  • the rotary valve 6 can be any circuit switch separately. In addition, between each two circuits set any mixing stages his.
  • inlet openings 9, 10 and 11 are all three inlet openings 9, 10 and 11 in the same radial plane, which achieves a very short construction length becomes.
  • a circumferential opening can also be used as a partial circuit for an additional heater or an exhaust gas heat exchanger provided his. Also combinations of different subcircuits are self-evident in the context of the invention possible.
  • the embodiment is not only the entire control valve in the pump housing 1 of Water pump integrated, but the same applies to one electrical and also an electronic interface, wherein via the electrical interface a central Power supply of the water pump and the servomotor 12 is provided from the electrical system.
  • An electronic Interface serves as a central connection for a data exchange, for setpoint specifications and for another exchange of information. You can do this the two interfaces in a common housing 14 sitting on the pump housing 1 and the drive motor 4 is flanged.
  • control valve By integrating the control valve in the pump housing 1 offers the possibility of the flow all important partial flows in a cooling circuit turn. By the integration is also continued a compact, cost-saving and reliable design a central working and control organ for the vehicle repair possible. A regulatory organ for The speed of the water pump is thus about the control function extended for the control valve 5.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Multiple-Way Valves (AREA)
  • Sliding Valves (AREA)
  • Temperature-Responsive Valves (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Description

Die Erfindung betrifft eine Wasserpumpe für einen Kühlkreislauf einer Brennkraftmaschine nach dem Oberbegriff von Anspruch 1.The invention relates to a water pump for a Cooling circuit of an internal combustion engine according to the preamble of claim 1.

Eine Wasserpumpe gemäß dem Oberbegriff von Anspruch 1 ist aus der DE 17 79 921 A bekannt. Dabei handelt es sich um ein mit einer Heizungsumwälzpumpe zusammenarbeitendes Mischventil. Hierbei ist in einem Ansaugstutzen, in den zwei weitere Stutzen münden, ein Steuerorgan in Form eines Drehschiebers angeordnet, welcher über ein Planetengetriebe von einem Anker eines Elektromotors angetrieben wird.A water pump according to the preamble of claim 1 is known from DE 17 79 921 A. It is is a cooperating with a heating circulation pump Mixing valve. This is in an intake manifold, in the two other nozzles lead, a control body arranged in the form of a rotary valve, which about a planetary gear from an anchor of a Electric motor is driven.

Für den Kühlkreislauf einer Brennkraftmaschine ist es allgemein bekannt eine Wasserpumpe zu verwenden, wobei die Steuerung über Thermostate erfolgt, welche temperaturabhängig den Kühlkreislauf schalten. Der Antrieb der Wasserpumpe kann mechanisch über einen von der Brennkraftmaschine angetriebenen Riemenantrieb oder auch elektrisch vorgenommen werden. Zur Schaltung der Kühlmittelströme und des Heizungskreislaufes sind Taktventile, Schieber- und Drehventile mit Schrittmotorenantriebe aus der Praxis bekannt.It is for the cooling circuit of an internal combustion engine commonly known to use a water pump, wherein the control takes place via thermostats, which are temperature-dependent switch the cooling circuit. The drive The water pump can be mechanically controlled by one of the Internal combustion engine driven belt drive or also be made electrically. To the circuit of Coolant flows and the heating circuit are Timing valves, gate valves and rotary valves with stepper motor drives known from practice.

In der DE 43 24 749 A1 ist ein Regelventil für einen Kühlkreislauf beschrieben, mit einem radialen Zulauf und drei radialen Abgängen, wobei die Verteilung des Kühlmittels durch einen Drehschieber erfolgt.In DE 43 24 749 A1 discloses a control valve for a Cooling circuit described, with a radial inlet and three radial outlets, the distribution of the Coolant is done by a rotary valve.

Nachteilig bei diesem Regelventil ist jedoch, dass man stets resultierende Kräfte auf dem Drehschieber hat, die zu Verklemmungen führen können und/oder entsprechend starke Antriebsmotoren zu dessen Verstellung erforderlich machen. Darüber hinaus sind die Verstell- bzw. Mischstellungen beschränkt.The disadvantage of this control valve, however, is that one always resulting forces on the rotary valve, which can lead to jamming and / or accordingly strong drive motors for its adjustment make necessary. In addition, the adjustment or mixed positions limited.

Aus der DE 41 25 366 C1 ist ein 3/2-Wegeventil für Flüssigkeitskreisläufe in Fahrzeugen bekannt, mit einem axialen Zulauf und zwei radialen Abführungen. Auch bei diesem Ventil sind die Einstellmöglichkeiten beschränkt, so dass zur Steuerung bzw. Regelung eines Kühl- und Heizungskreislaufes noch weitere Einrichtungen erforderlich sind.From DE 41 25 366 C1 is a 3/2-way valve for Fluid circuits known in vehicles, with a axial inlet and two radial discharges. Also with this valve, the setting options are limited, so that the control or regulation of a Cooling and heating circuit even more facilities required are.

Aus der DE 44 38 552 C1 ist eine Temperaturregelvorrichtung für den Kühlkreislauf einer Brennkraftmaschine beschrieben, welche mit Betätigungselementen für eine auf einer Schaltwelle angeordnete Schaltklappe versehen ist. Die Schaltklappenwelle liegt dabei im Bereich einer gedachten Wandlinie der Kühlerrücklaufleitung bzw. Pumpenzuleitung und im Einmündungsbereich der Kurzschlußleitung in die Pumpenzuleitung. Zur Betätigung der Schaltklappe ist ein Temperaturdehnstoffelement, eine sogenannte Wachspatrone, vorgesehen.From DE 44 38 552 C1 is a temperature control device for the cooling circuit of an internal combustion engine described which with actuators for a switching flap arranged on a switching shaft is provided. The switching valve shaft lies in the Area of an imaginary wall line of the radiator return line or pump supply and in the junction area the short-circuit line in the pump supply line. For operation the switching flap is a temperature expansion element, a so-called wax cartridge, provided.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Steuervorrichtung für den Kühlkreislauf einer Brennkraftmaschine zu schaffen, welche in einer sehr kompakten Bauweise mehrere Glieder des Kühlkreislaufes und mehrere Funktionen von Stell- und Schaltelementen beinhaltet.The present invention is based on the object a control device for the cooling circuit a To create internal combustion engine, which in a very compact design several links of the cooling circuit and several functions of setting and switching elements includes.

Erfindungsgemäß wird diese Aufgabe durch die im Anspruch 1 genannten Merkmale gelöst.According to the invention this object is achieved by the in the claim 1 mentioned features solved.

Durch die erfindungsgemäße Integration des Stellventiles in das Gehäuse der Wasserpumpe wird ein sehr kompaktes Bauteil erreicht, wobei gleichzeitig durch das Stellventil bei entsprechender Ausgestaltung mehrere Schaltstellungen realisierbar sind, so dass im Bedarfsfalle weitere Regelglieder in einem Kühl- und gegebenenfalls einem Heizungskreislauf einer Brennkraftmaschine entfallen können. Dabei können nicht nur die verschiedenen Funktionen bzw. Schaltstellungen realisiert werden, sondern darüber hinaus können auch die für eine Steuerung notwendigen mechanischen Teile in dem Pumpengehäuse aufgenommen werden oder entsprechend an das Pumpengehäuse angeflanscht werden.Due to the integration of the control valve according to the invention in the housing of the water pump becomes a very compact Achieved component, while at the same time by the Control valve with appropriate design several Switch positions are feasible, so that in case of need more control elements in a cooling and optionally a heating circuit of an internal combustion engine can be omitted. Not only can the various functions or switching positions but can also be realized the mechanical parts necessary for a control be received in the pump housing or accordingly be flanged to the pump housing.

Mit der erfindungsgemäßen Ausgestaltung kann praktisch mit einem einzigen Gerät der gesamte Kreislauf zur Kühlung und gegebenenfalls auch zur Heizung für nahezu alle in der Praxis vorkommenden Fälle geregelt werden. Mit dem Stellventil sind sowohl einzelne Öffnungen ansteuerbar als auch Mischbetriebe möglich, so dass auf weitere Steuer- und Regelglieder im Kühl- und Heizungskreislauf verzichtet werden kann.With the embodiment of the invention can be practical with a single device the entire circuit to Cooling and possibly also for heating for almost all cases occurring in practice are regulated. With the control valve are both individual openings controllable as well as mixed operations possible, so that to other control and regulating members in the cooling and heating circuit can be waived.

Durch die Ausbildung des Stellventiles als Drehschieber mit der axialen Zuführung oder Abführung des Kühlmediums und den Zu- oder Auslauföffnungen am Umfang des Pumpengehäuses ergeben sich keine resultierenden Kräfte auf den Drehschieber, so dass man mit geringen Stell- und Haltekräften für den Drehschieber auskommt. Darüber hinaus treten bei dem Stellventil nur geringe Druckverluste auf, bei gleichzeitig hohen Stellgeschwindigkeiten.Due to the design of the control valve as a rotary valve with the axial supply or discharge of the cooling medium and the inlet or outlet openings on the circumference The pump housing results in no resulting Forces on the rotary valve, so that one with small Setting and holding forces for the rotary valve manages. In addition, occur in the control valve only small Pressure losses on, at the same time high speeds.

Die axiale Öffnung in dem Drehschieber dient zur Zufuhr von Kühlmedium in dessen Innenraum, wenn der Drehschieber auf der Druckseite der Pumpeinrichtung angeordnet ist, wobei in diesem Falle die in der Umfangswand des Pumpengehäuses angeordneten Öffnungen Auslauföffnungen zur Weiterleitung des Kühlmediums darstellen.The axial opening in the rotary valve is used for supply of cooling medium in its interior when the Rotary slide on the pressure side of the pumping device is arranged, in which case in the peripheral wall the pump housing arranged openings Outlet openings for forwarding the cooling medium represent.

Umgekehrt, wenn der Drehschieber auf der Saugseite der Pumpeinrichtung angeordnet ist, so erfolgt die Abfuhr von Kühlmedium über die axiale Öffnung zur Saugseite der Pumpe und entsprechend eine Zufuhr in das Drehschieberinnere über die Steueröffnung durch die in der Umfangswand des Pumpengehäuses angeordneten Öffnungen.Conversely, if the rotary valve on the suction side of the Pumping device is arranged, the discharge takes place from cooling medium through the axial opening to the suction side the pump and, correspondingly, a supply to the rotary valve interior over the control opening through in the Peripheral wall of the pump housing arranged openings.

Eine mögliche Ausgestaltung bei der Verwendung eines Stellmotors für den Drehschieber besteht darin, dass neben dem Teilkreislauf für die Kühlerleitung ein weiterer Teilkreislauf für eine Kurzschlußkreislaufleitung und ein dritter Teilkreislauf für einen Wärmetauscher eines Heizungskreislaufes vorgesehen sind. Alternativ oder in Kombination kann auch ein Teilkreislauf für eine Zusatzheizung und/oder eine Abgaswärmetauscheinrichtung vorgesehen sein.One possible embodiment when using a Actuator for the rotary valve is that next to the partial circuit for the radiator line another Partial circuit for a short circuit circulation line and a third subcircuit for a heat exchanger a heating circuit are provided. Alternatively or in combination can also be a partial cycle for an additional heater and / or an exhaust heat exchanger be provided.

In den übrigen Unteransprüchen und in dem nachfolgend anhand der Zeichnung prinzipmäßig beschriebenen Ausführungsbeispiel sind vorteilhafte Weiterbildungen und Ausgestaltungen der Erfindung aufgezeigt.In the remaining subclaims and in the following Based on the drawing principle described embodiment are advantageous developments and Embodiments of the invention shown.

Es zeigt:

Fig. 1
eine Darstellung der erfindungsgemäßen Wasserpumpe, teilweise im Schnitt;
Fig. 2
eine perspektivische Darstellung der Wasserpumpe nach Fig. 1;
Fig. 3
einen schematischen Querschnitt durch das in die Wasserpumpe integrierte Stellventil; und
Figuren 4 bis 7
verschiedene Steuerstellungen des Stellventiles.
It shows:
Fig. 1
an illustration of the water pump according to the invention, partly in section;
Fig. 2
a perspective view of the water pump of Fig. 1;
Fig. 3
a schematic cross section through the integrated into the water pump control valve; and
FIGS. 4 to 7
various control positions of the control valve.

Die in den Figuren dargestellte Wasserpumpe ist grundsätzlich von bekannter Bauart, weshalb nachfolgend nur auf die für die Erfindung wesentlichen Teile näher eingegangen wird. So kann die Wasserpumpe z.B. als Pumpeinrichtung eine in einem Pumpengehäuse 1 angeordnete Kreiselpumpe mit einem in einem Spiralkanal 2 angeordnetes Flügelrad 3 sein. Das Flügelrad 3 wird in bekannter Weise durch einen Antriebsmotor 4 angetrieben. Alternativ zu dem Antrieb über den Antriebsmotor 4 ist auch ein mechanischer Antrieb über einen von der Brennkraftmaschine angetriebenen Riementrieb, z.B. mit einem Keilriemen, für die Wasserpumpe denkbar.The water pump shown in the figures is basically of known type, which is why only to the essential parts of the invention in more detail will be received. Thus, the water pump may e.g. as Pumping device arranged in a pump housing 1 Centrifugal pump with one in a spiral channel 2 be arranged impeller 3. The impeller 3 is in known manner by a drive motor 4 driven. Alternatively to the drive via the drive motor 4 is also a mechanical drive over one of the Internal combustion engine driven belt drive, e.g. With a V-belt, conceivable for the water pump.

In einer axialen Erweiterung des Pumpengehäuses 1 bzw. im Bereich des in üblicher Weise vorhandenen Zulaufes zu dem Flügelrad 3 der Wasserpumpe ist ein Stellventil 5 mit einem Drehschieber 6 in Hülsenform angeordnet, wobei die Längsachse des Drehschiebers koaxial zur Pumpenlängsachse bzw. des Flügelrades 3 liegt. Eine axiale Sammelöffnung 7 des Drehschiebers 6 bildet eine Zulauföffnung zu dem Flügelrad 3 der Wasserpumpe. Eine mit einem nicht dargestellten Kühler verbundene Kühlerleitung 8 mündet mit einer Zulauföffnung 9 in die Umfangswand des Pumpengehäuses 1.In an axial extension of the pump housing 1 and in the range of the usual existing feed to the impeller 3 of the water pump is a control valve 5 arranged with a rotary valve 6 in sleeve form, wherein the longitudinal axis of the rotary valve coaxial with Pump longitudinal axis and the impeller 3 is located. A axial collecting opening 7 of the rotary valve 6 forms a Inlet opening to the impeller 3 of the water pump. A with a radiator not shown connected cooler line 8 opens with an inlet opening 9 in the Peripheral wall of the pump housing 1.

Wie aus den Figuren 3 bis 7 ersichtlich ist, ist die Umfangswand des Pumpengehäuses 1 zusätzlich noch mit zwei weiteren Zulauföffnungen 10 und 11 versehen, die für weitere Teilkreisläufe des Kühlmediums in dem Kühlkreislauf vorgesehen sind. Auf der von der Sammelöffnung 7 abgewandten Seite ist der Drehschieber 6 stirnseitig abgeschlossen und auf dieser Seite auch mit einem Stellmotor 12 zur Verdrehung des Drehschiebers versehen.As can be seen from FIGS. 3 to 7, FIG Peripheral wall of the pump housing 1 additionally with two further inlet openings 10 and 11 are provided, the for further partial circuits of the cooling medium in the Cooling circuit are provided. On the from the collection port 7 side facing away from the rotary valve. 6 closed on the front and on this side too with a servomotor 12 for rotating the rotary valve Provided.

Der Drehschieber 6 ist in seiner Umfangswand mit einer Steueröffnung 13 versehen. Über die Steueröffnung 13 erfolgt in Abhängigkeit von der Drehstellung des Drehschiebers 6 eine Verbindung von der Zulauföffnung 9, 10 oder 11 zu der Sammelöffnung 7 und damit eine Verbindung zur Saugseite des Flügelrades 3 der Wasserpumpe. The rotary valve 6 is in its peripheral wall with a Control opening 13 provided. About the control port 13 takes place in dependence on the rotational position of the rotary valve 6 a connection from the inlet opening 9, 10 or 11 to the collection port 7 and thus a connection to the suction side of the impeller 3 of the water pump.

Wie aus den Figuren 3 bis 7 ersichtlich ist, sind - entsprechend der Drehstellung des Drehschiebers 6 - verschiedene Betriebsstellungen möglich und zwar nicht nur Einzelströmungen, sondern auch Mischbetriebsströmungen. Hierzu besitzt die Sammelöffnung 13 in der Umfangswand des Drehschiebers 6 eine derartige Öffnungsweite, dass sowohl Einzelströmungen als auch Mischbetriebsströmungen möglich sind.As can be seen from FIGS. 3 to 7, according to the rotational position of the rotary valve 6 - different operating positions possible and not only single flows, but also mixed operating flows. For this purpose has the collecting port 13 in the Circumferential wall of the rotary valve 6 such an opening width, that both individual flows as well Mixed operating flows are possible.

Gemäß Fig. 3 müssen hierzu folgende Bedingungen erfüllt sein: δ < γ - (ϕn 2 + ϕm 2 ) According to FIG. 3, the following conditions must be fulfilled for this: δ <γ - ( φ n 2 + φ m 2 )

Dabei bedeuten:

  • γ Öffnungswinkel des Drehschiebers
  • δ Winkel zwischen den Stutzen
  • ϕ Winkelöffnung der Anschlußstutzen
  • β freigeschalteter Öffnungswinkel des entsprechenden Stutzens
    • Where:
  • γ opening angle of the rotary valve
  • δ angle between the sockets
  • φ angular opening of the connecting piece
  • β unlocked opening angle of the corresponding nozzle

    • δ1 + δ2 + δ3 = 360°, wobei die einzelnen Winkel möglichst gleich gewählt werden sollten
    βmax = ϕ Vollöffnung des Querschnittes    δ 1 + δ 2 + δ 3 = 360 °, where the individual angles should be chosen as equal as possible
    β max = φ full opening of the cross section

    In Fig. 3 sind die Winkel mittels Schnittdarstellung durch die Mittenebene der Anschlußquerschnitte dargestellt. Alle Winkel stehen in einem unmittelbaren Zusammenhang mit den Querschnittsfunktionen. Neben der relativ einfachen Form einer Bohrung für die Öffnungen können auch andere, nicht kreisrunde Querschnitte gewählt werden. Auf diese Weise kann man einen weiteren Freiheitsgrad bei der Festlegung des Stellverhaltens erreichen.In Fig. 3, the angles by means of sectional representation represented by the center plane of the connection cross sections. All angles are directly related with the cross-section functions. In addition to the relatively simple form of a hole for the openings You can also choose other, non-circular cross sections become. That way you can have another one Degree of freedom in determining the positioning behavior to reach.

    Bei dem dargestellten Ausführungsbeispiel gehen die Anschlußstutzen radial von dem Pumpengehäuse 1 ab. Um eine strömungsgünstigere Form zu erreichen, ist es auch möglich die Anschlußstutzen halb-axial bzw. gegen die Radiale geneigt an das Pumpengehäuse 1 anzusetzen.In the illustrated embodiment, go Connecting piece radially from the pump housing 1 from. Around achieving a streamlined shape is it also possible the connection piece half-axial or against the Radiale inclined to attach to the pump housing 1.

    In den Figuren 4 bis 7 sind verschiedene Steuerstellungen der Steuervorrichtung 1 dargestellt. So zeigt Fig. 4 die Stellung im Normalbetrieb "Kühlen". In der Fig. 5 ist ein erster Mischbetrieb in der Warmlaufphase des Motores bei gleichzeitigem Heizbetrieb dargestellt, wobei die Zulauföffnung 9 der Kühlerleitung abgesperrt und die Zulauföffnungen 10 und 11 für die Kurzschlußkreislaufleitung und für den Heizungskreislauf offen sind. Fig. 6 zeigt einen zweiten Mischbetrieb in der Phase "Warmlaufen" und Kühlen", wobei der Heizungskreislauf abgesperrt ist.In Figures 4 to 7 are different control positions the control device 1 shown. So shows Fig. 4 shows the position in normal operation "cooling". In the Fig. 5 is a first mixing operation in the warm-up phase of the engine during simultaneous heating operation, wherein the inlet opening 9 of the radiator line shut off and the inlet openings 10 and 11 for the Short circuit circulation line and for the heating circuit are open. Fig. 6 shows a second mixing operation in the phase "warm-up and cooling", where the heating circuit is shut off.

    Die Fig. 7 zeigt einen dritten Mischbetrieb in der Phase "Heizen und Kühlen", wobei die Zulauföffnung 10 für die Kurzschlußkreislaufleitung abgesperrt ist.FIG. 7 shows a third mixing operation in FIG Phase "heating and cooling", wherein the inlet opening 10th is shut off for the short circuit circuit line.

    Entsprechend dem in der Fig. 4 dargestellten Betrieb, sind auch im Bedarfsfalle noch andere einzelne Verbindungen von der Steueröffnung 13 des Drehschiebers 6 zu einer einzelnen Umfangsöffnung möglich.According to the operation shown in FIG. 4, are also in case of need other single connections from the control port 13 of the rotary valve 6 to a single circumferential opening possible.

    Anstelle des Heizungskreislaufes kann auch ein zweiter Kurzschlußkreis, z.B. für den Zylinderkopf, vorgesehen sein.Instead of the heating circuit can also be a second Short circuit, e.g. for the cylinder head, provided his.

    Wie ersichtlich, kann der Drehschieber 6 jeden Kreislauf separat schalten. Zusätzlich können zwischen jeweils zwei Kreisläufen jegliche Mischstufen eingestellt sein.As can be seen, the rotary valve 6 can be any circuit switch separately. In addition, between each two circuits set any mixing stages his.

    An dem Stellventil 5 liegen keine resultierenden Strömungskräfte vor, die ein Moment um die Drehachse des Drehschiebers 6 erzeugen würden. Dies bedeutet, Veränderungen der Drehschieberstellung infolge einer Durchströmung sind nicht möglich, weshalb die Antriebsleistung für den Stellmotor 12 entsprechend gering gehalten werden kann. Durch die geringen Stellkräfte ist im Normalfall auch keine besondere Lagerung des Drehschiebers 6 erforderlich. Da in jeder Winkelstellung Querschnitte in radialer Richtung freigeschaltet sind, treten außerdem auch nur sehr geringe Druckabfälle über der Steuervorrichtung auf, womit besondere Abdichtungen der einzelnen Zu- und Abläufe entfallen können.At the control valve 5, there are no resulting flow forces which is a moment about the axis of rotation of the Rotary valve 6 would produce. This means changes the rotary valve position due to a flow are not possible, which is why the drive power kept correspondingly low for the servo motor 12 can be. Due to the low restoring forces is in Normally, no special storage of the rotary valve 6 required. Because in every angular position Cross sections are unlocked in the radial direction, also occur only very low pressure drops above the control device, bringing special seals the individual inflows and outflows are eliminated can.

    Bei dem dargestellten Ausführungsbeispiel liegen alle drei Zulauföffnungen 9, 10 und 11 in der gleichen Radialebene, womit eine sehr kurze Baulänge erreicht wird.In the illustrated embodiment are all three inlet openings 9, 10 and 11 in the same radial plane, which achieves a very short construction length becomes.

    Eine Umfangsöffnung kann auch als Teilkreislauf für eine Zusatzheizung oder einen Abgaswärmetauscher vorgesehen sein. Auch Kombinationen verschiedener Teilkreisläufe sind im Rahmen der Erfindung selbstverständlich möglich. A circumferential opening can also be used as a partial circuit for an additional heater or an exhaust gas heat exchanger provided his. Also combinations of different subcircuits are self-evident in the context of the invention possible.

    Wie aus dem Ausführungsbeispiel ersichtlich, ist nicht nur das gesamte Stellventil in dem Pumpengehäuse 1 der Wasserpumpe integriert, sondern gleiches gilt für eine elektrische und auch eine elektronische Schnittstelle, wobei über die elektrische Schnittstelle eine zentrale Energieversorgung der Wasserpumpe und des Stellmotores 12 vom Bordnetz aus vorgesehen ist. Eine elektronische Schnittstelle dient als eine zentrale Anbindung für einen Datenaustausch, für Sollwertvorgaben und für einen weiteren Informationsaustausch. Hierzu können die beiden Schnittstellen in einem gemeinsamen Gehäuse 14 sitzen, das an das Pumpengehäuse 1 bzw. den Antriebsmotor 4 angeflanscht ist.As can be seen from the embodiment is not only the entire control valve in the pump housing 1 of Water pump integrated, but the same applies to one electrical and also an electronic interface, wherein via the electrical interface a central Power supply of the water pump and the servomotor 12 is provided from the electrical system. An electronic Interface serves as a central connection for a data exchange, for setpoint specifications and for another exchange of information. You can do this the two interfaces in a common housing 14 sitting on the pump housing 1 and the drive motor 4 is flanged.

    Durch die Integration des Stellventiles in das Pumpengehäuse 1 bietet sich die Möglichkeit, den Durchfluß aller wichtigen Teilströme in einem Kühlkreislauf zu schalten. Durch die Integration ist weiterhin auch eine kompakte, kostensparende und betriebssichere Gestaltung eines zentralen Arbeits- und Stellorganes für die Fahrzeugreparierung möglich. Ein Regelorgan für die Drehzahl der Wasserpumpe wird somit um die Kontrollfunktion für das Stellventil 5 erweitert.By integrating the control valve in the pump housing 1 offers the possibility of the flow all important partial flows in a cooling circuit turn. By the integration is also continued a compact, cost-saving and reliable design a central working and control organ for the vehicle repair possible. A regulatory organ for The speed of the water pump is thus about the control function extended for the control valve 5.

    Mit der erfindungsgemäßen Lösung werden zwei wesentliche Merkmale eines Kühlsystemes vereint, nämlich:

  • 1. eine wasserseitige Regulierung der Temperatur in dem Kühlkreislauf
  • 2. eine Applikation dieser Regelung für alle am Stellventil 5 angeschlossene Teilkühlmittelströme.
    • The solution according to the invention combines two essential features of a cooling system, namely:
  • 1. a water-side regulation of the temperature in the cooling circuit
  • 2. an application of this rule for all connected to the control valve 5 subcoolant streams.

    • Insbesondere mit einer drehzahlgeregelten elektrischen Wasserpumpe und ein über den Stellmotor 12 elektrisch angetriebenes Stellventil 5 läßt sich eine genaue Temperierung von allen Teilkreisläufen erreichen. Hierzu wird man auch entsprechende Temperaturmeßstellen für die Regelung der Pumpe und des Kühlkreislaufes in die Wasserpumpe integrieren.In particular, with a variable speed electrical Water pump and a via the servo motor 12 electrically driven control valve 5 can be a precise temperature reach from all subcircuits. For this you will also be appropriate Temperaturmeßstellen for the regulation of the pump and the cooling circuit in the Integrate water pump.

    Claims (12)

    1. A water pump for the cooling circuit of an internal combustion engine in a motor vehicle having a pump housing (1) and a driven pump device in the pump housing (1), a control valve (5) with a rotary slide valve (6) being integrated in the pump housing (1) and the rotary slide valve (6) having at least approximately the shape of a sleeve and being provided with an axial collecting opening (7) for the supply or removal of coolant to/from the inlet or delivery side of the pump device (3),
      characterised in that
      provided in the peripheral wall of the pump housing (1) are feed/discharge openings (9, 10, 11) for a radiator line (8) which can be connected to the radiator and for two or more further partial circuits, the rotary slide valve (6) having a control opening (13) in its peripheral wall with an opening width through which is created a connection from the collecting opening (7) to a single feed/discharge opening (9, 10, 11) or, for mixed operation, an overlapping connection to two feed/discharge openings (9, 10, 11) positioned adjacent to one another, and an electrical interface for a central power supply from the mains and an electronic interface for a central connection for data exchange, pre-determined set points or for further information exchange being provided in or on the pump housing (1).
    2. A water pump in accordance with claim 1,
      characterised in that
      the two interfaces are positioned in a common housing (14) which is flanged to the pump housing (1).
    3. A water pump in accordance with one of claims 1 or 2,
      characterised in that
      the rotary slide valve (6) is provided with a servomotor (12).
    4. A water pump in accordance with one of claims 1 to 3,
      characterised in that
      the second part circuit (10/11) is provided for a short circuit line for the coolant.
    5. A water pump in accordance with one of claims I to 4,
      characterised in that
      the third part circuit (10) is provided for a heating circuit.
    6. A water pump in accordance with one of claims 1 to 3,
      characterised in that
      the second or third part circuit (10/11) is provided for an additional heating system and/or an exhaust gas heat exchanger device.
    7. A water pump in accordance with one of claims 1 to 6,
      characterised in that
      the feed/discharge openings (9, 10, 11) lie in the same radial plane of the pump housing (1).
    8. A water pump in accordance with claim 7,
      characterised in that
      the angular distances between the feed/discharge openings (9, 10, 11) are distributed evenly around the periphery of the pump housing (1).
    9. A water pump in accordance with one of claims 1 to 7,
      characterised in that
      connectors branch off the feed/discharge openings (9, 10, 11) at an angle inclined relation to the radials.
    10. A water pump in accordance with one of claims 1 to 9,
      characterised in that
      it can be driven electrically by a drive motor (4).
    11. A water pump in accordance with one of claims 1 to 9,
      characterised in that
      it can be driven mechanically by a belt drive driven by the internal combustion engine.
    12. A water pump in accordance with one of claims 1 to 11,
      characterised in that
      the pump device is designed as a centrifugal pump.
    EP99101947A 1998-03-04 1999-01-30 Water pump for the cooling circuit of an internal combustion engine Expired - Lifetime EP0940565B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19809123A DE19809123B4 (en) 1998-03-04 1998-03-04 Water pump for the cooling circuit of an internal combustion engine
    DE19809123 1998-03-04

    Publications (3)

    Publication Number Publication Date
    EP0940565A2 EP0940565A2 (en) 1999-09-08
    EP0940565A3 EP0940565A3 (en) 2000-03-01
    EP0940565B1 true EP0940565B1 (en) 2004-10-06

    Family

    ID=7859612

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP99101947A Expired - Lifetime EP0940565B1 (en) 1998-03-04 1999-01-30 Water pump for the cooling circuit of an internal combustion engine

    Country Status (4)

    Country Link
    US (1) US6257177B1 (en)
    EP (1) EP0940565B1 (en)
    JP (1) JP3338954B2 (en)
    DE (2) DE19809123B4 (en)

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    Also Published As

    Publication number Publication date
    DE59910681D1 (en) 2004-11-11
    DE19809123B4 (en) 2005-12-01
    JPH11336547A (en) 1999-12-07
    EP0940565A2 (en) 1999-09-08
    JP3338954B2 (en) 2002-10-28
    EP0940565A3 (en) 2000-03-01
    DE19809123A1 (en) 1999-09-16
    US6257177B1 (en) 2001-07-10

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