EP0903482A2 - Control device of the coolant circuit for an internal combustion engine - Google Patents

Control device of the coolant circuit for an internal combustion engine Download PDF

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Publication number
EP0903482A2
EP0903482A2 EP98115482A EP98115482A EP0903482A2 EP 0903482 A2 EP0903482 A2 EP 0903482A2 EP 98115482 A EP98115482 A EP 98115482A EP 98115482 A EP98115482 A EP 98115482A EP 0903482 A2 EP0903482 A2 EP 0903482A2
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EP
European Patent Office
Prior art keywords
valve
line
differential pressure
plate
cooling water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98115482A
Other languages
German (de)
French (fr)
Other versions
EP0903482A3 (en
EP0903482B1 (en
Inventor
Reiner Bachschmid
Clemens Bentele
Mario Erdmann
Jens Von Gregory
Mehmet Haseki
Peter Moser
Friedrich Schulz
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
Daimler Benz AG
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Publication date
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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
    • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • 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
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/08—Cabin heater

Definitions

  • the invention relates to a device for regulation of the cooling water circuit for an internal combustion engine according to the one defined in the preamble of claim 1 Art.
  • a generic device is described in US Pat. No. 4,972,808.
  • a disadvantage of this device is that during the warm-up phase of the engine or during extended operation at low speeds, such as stop and go "operation in city traffic via the heating heat exchanger cannot provide enough heat to heat the passenger compartment. If sufficient heating power is nevertheless required, additional devices such as a separate heating device for the heating heat exchanger and / or heating water pumps are required required.
  • the present invention is based on the object a device of the type mentioned at the beginning improve that in the warm-up phase and / or at one Vehicle operation with low speeds and low Engine temperatures for heating the passenger compartment more thermal energy is available.
  • this task is characterized by Features mentioned in claim 1 solved.
  • differential pressure valve and its switching is particularly in the warm-up phase maximum heat output from the engine via the heating heat exchanger reached at low engine speeds, because the total amount of cooling water overflows the heating, with which the engine heat accumulates completely be given off via the heating heat exchanger can. Only opens at higher water pump speeds the differential pressure valve and it is done in known Way a distribution of the cooling water flow over the Bypass line and the heating line.
  • cooling water circuit In normal driving, can in a conventional manner the cooling water circuit is operated in a mixed operation be, with an additional division of the Cooling water can take place in a return line is passed over the cooler.
  • the cooling water circuit shown in Fig. 1 is basically regarding the structure and mode of operation of known design, which is why only briefly below on the essential parts are received.
  • An internal combustion engine 1 with a crankcase 2 and a cylinder head 3 is on over the cylinder head 3 a cooling water circuit connected.
  • the cooling water circuit has a water pump 4, which the crankshaft of the engine is driven.
  • a thermostat valve 5 in a thermostat housing 6 In the direction of flow is located behind the cylinder head 3 a thermostat valve 5 in a thermostat housing 6.
  • the thermostatic valve 5 with cooling water channels is on the input side of the cylinder head 3 connected.
  • Output side leads a bypass line from the thermostat valve 5 7, a heating line 8 and a water cooler supply line 9 out.
  • In the heating line 8 is a heating heat exchanger 10 through which heating of a passenger compartment, not shown.
  • the water cooler feed line 9 leads to a water cooler 12, from which a water pump feed line 13 branches off, which leads to the water pump 4.
  • a differential pressure valve 14 is arranged, with a view to constructive simplification and easy installation in the thermostatic valve housing 6 is integrated. Of course it can Differential pressure valve 14, however, also on another Place as a separate unit in the bypass line 7 be arranged.
  • the differential pressure valve 14 has a closing member 15 on that by a coil spring 16 as a spring device is biased in the closed position.
  • Thermostatic valve 5 is shown as a two-plate valve formed with valve turntables 17 and 18.
  • valve turntables 17 and 18 are shown as a two-plate valve formed with valve turntables 17 and 18.
  • another thermostatic valve design is also conceivable.
  • valve platter 18 at a distance from the inflow opening into the bypass line 7, but due to the low speed keeps the closing member 15 of the Differential pressure valve 14 closed the bypass line 7. Only from a preselected engine speed and thus a correspondingly higher pressure in the cooling water circuit takes place depending on the preload the coil spring 16 an opening of the bypass line 7. This can e.g. at a pressure of approx. 0.3 cash and higher. Only from this design point there is a partial flow according to arrow A in the Fig. 2 on the opening closing member 15 in the Bypass line 7 in addition to the cooling water flow via the heating line 8.
  • the thermostatic valve 5 When the temperature of the motor is a preselected value reached, e.g. greater than 80 ° C, opens in a known manner the thermostatic valve 5 for a mixing phase (see Fig. 3).
  • the two valve turntables are located there 17 and 18 in a middle position in which all exits are open from the thermostatic valve housing 6, namely the bypass line 7, the heating line 8 and the Water cooler supply line 9.
  • This phase marks the beginning the flow of cooling water through the water cooler supply line 9 and the flow through the water cooler 12 before via the water pump return line 13 a return line to the water pump 4 takes place.
  • the closing member 15 of the differential pressure valve 14 is closed, which in turn the Heating heat exchanger 10 increasingly supplied thermal energy becomes.
  • the cooling water supply 4 thus corresponds to the known cooling water supply According to the state of the art.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Temperature-Responsive Valves (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

The device has a bypass (7) with RPM-dependently controlled differential pressure valve (14). The bypass is closed and all the cooling water is passed through the heat conductor (8), during the warming-up phase or in a low engine temperature phase. With higher RPM, the valve opens and frees the bypass. The result is a volumetric division of the cooling water via the bypass and the heat conductor, dependent upon the position of the differential pressure valve.

Description

Die Erfindung betrifft eine Vorrichtung zur Regelung des Kühlwasserkreislaufes für einen Verbrennungsmotor nach der im Oberbegriff von Anspruch 1 näher definierten Art.The invention relates to a device for regulation of the cooling water circuit for an internal combustion engine according to the one defined in the preamble of claim 1 Art.

Eine gattungsgemäße Vorrichtung ist in der US-PS 4 972 808 beschrieben. Nachteilig bei dieser Vorrichtung ist jedoch, daß während der Warmlaufphase des Motores oder bei einem längeren Betrieb mit niedrigen Drehzahlen, wie z.B.

Figure 00010001
stop and go"-Betrieb im Stadtverkehr über den Heizungs-Wärmetauscher nicht genügend Wärme zur Beheizung des Fahrgastinnenraumes zur Verfügung gestellt werden kann. Wird trotzdem eine ausreichende Heizleistung gewünscht, sind Zusatzeinrichtungen, wie z.B. eine gesonderte Heizeinrichtung für den Heizungs-Wärmetauscher und/oder Heizwasserpumpen erforderlich.A generic device is described in US Pat. No. 4,972,808. A disadvantage of this device, however, is that during the warm-up phase of the engine or during extended operation at low speeds, such as
Figure 00010001
stop and go "operation in city traffic via the heating heat exchanger cannot provide enough heat to heat the passenger compartment. If sufficient heating power is nevertheless required, additional devices such as a separate heating device for the heating heat exchanger and / or heating water pumps are required required.

Zum allgemeinen Stand der Technik wird noch auf die DE 43 33 110 A1 und DE 195 08 102 C1 hingewiesen. The general state of the art is still on the DE 43 33 110 A1 and DE 195 08 102 C1 pointed out.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs erwähnten Art derart zu verbessern, daß in der Warmlaufphase und/oder bei einem Fahrzeugbetrieb mit niederen Drehzahlen und niederen Motortemperaturen zur Beheizung des Fahrgastinnenraumes mehr Wärmeenergie zur Verfügung steht.The present invention is based on the object a device of the type mentioned at the beginning improve that in the warm-up phase and / or at one Vehicle operation with low speeds and low Engine temperatures for heating the passenger compartment more thermal energy is available.

Erfindungsgemäß wird diese Aufgabe durch die im kennzeichnenden Teil von Anspruch 1 genannten Merkmale gelöst.According to the invention, this task is characterized by Features mentioned in claim 1 solved.

Durch das erfindungsgemäße Differenzdruckventil und dessen Schaltung wird insbesondere in der Warmlaufphase des Motors eine maximale Wärmeabgabe über den Heizungs-Wärmetauscher bei niedrigen Motordrehzahlen erreicht, denn die gesamte Kühlwassermenge strömt über die Heizung, womit die anfallende Motorwärme vollständig über den Heizungs-Wärmetauscher abgegeben werden kann. Erst bei höheren Wasserpumpendrehzahlen öffnet das Differenzdruckventil und es erfolgt in bekannter Weise eine Aufteilung des Kühlwasserstromes über die Bypass-Leitung und die Heizungsleitung.By the differential pressure valve and its switching is particularly in the warm-up phase maximum heat output from the engine via the heating heat exchanger reached at low engine speeds, because the total amount of cooling water overflows the heating, with which the engine heat accumulates completely be given off via the heating heat exchanger can. Only opens at higher water pump speeds the differential pressure valve and it is done in known Way a distribution of the cooling water flow over the Bypass line and the heating line.

Im normalen Fahrbetrieb kann in herkömmlicher Weise der Kühlwasserkreislauf in einem Mischbetrieb betrieben werden, wobei eine zusätzliche Aufteilung des Kühlwassers in eine Rückleitung erfolgen kann, die über den Kühler geführt wird.In normal driving, can in a conventional manner the cooling water circuit is operated in a mixed operation be, with an additional division of the Cooling water can take place in a return line is passed over the cooler.

In den Unteransprüchen und in dem nachfolgend prinzipmäßig anhand der Zeichnung beschriebenen Ausführungsbeispiel sind vorteilhafte Weiterbildungen und Ausgestaltungen der Erfindung ersichtlich. In the subclaims and in the following in principle based on the drawing embodiment described are advantageous developments and refinements the invention can be seen.

Es zeigt:

Fig. 1
Schemadarstellung eines Kühlwasserkreislaufes mit dem erfindungsgemäßen Differenzdruckventil,
Fig. 2
das Thermostatventil mit dem Differenzdruckventil im Kurzschlußbetrieb,
Fig. 3
das Thermostatventil mit dem Differenzdruckventil in der Mischphase, und
Fig. 4
das Thermostatventil mit dem Differenzdruckventil im normalen Betriebszustand.
It shows:
Fig. 1
Schematic representation of a cooling water circuit with the differential pressure valve according to the invention,
Fig. 2
the thermostatic valve with the differential pressure valve in short-circuit operation,
Fig. 3
the thermostatic valve with the differential pressure valve in the mixing phase, and
Fig. 4
the thermostatic valve with the differential pressure valve in normal operating condition.

Der in der Fig. 1 dargestellte Kühlwasserkreislauf ist grundsätzlich bezüglich Aufbau und Wirkungsweise von bekannter Bauart, weshalb nachfolgend nur kurz auf die wesentlichen Teile eingegangen wird.The cooling water circuit shown in Fig. 1 is basically regarding the structure and mode of operation of known design, which is why only briefly below on the essential parts are received.

Ein Verbrennungsmotor 1 mit einem Kurbelgehäuse 2 und einem Zylinderkopf 3 ist über den Zylinderkopf 3 an einen Kühlwasserkreislauf angeschlossen. Der Kühlwasserkreislauf weist eine Wasserpumpe 4 auf, die über die Kurbelwelle des Motors angetrieben wird. In Strömungsrichtung hinter dem Zylinderkopf 3 befindet sich ein Thermostatventil 5 in einem Thermostatgehäuse 6. Eingangsseitig ist das Thermostatventil 5 mit Kühlwasserkanälen des Zylinderkopfes 3 verbunden. Ausgangsseitig führt aus dem Thermostatventil 5 eine Bypass-Leitung 7, eine Heizleitung 8 und eine Wasserkühlerzuleitung 9 heraus. In der Heizleitung 8 befindet sich ein Heizungs-Wärmetauscher 10, durch den eine Aufheizung eines nicht dargestellten Fahrgastraumes erfolgt. Über eine Heizungsrückleitung 11, in die auch die Bypass-Leitung 7 einmündet, erfolgt eine Rückführung von Kühlwasser zur Wasserpumpe 4.An internal combustion engine 1 with a crankcase 2 and a cylinder head 3 is on over the cylinder head 3 a cooling water circuit connected. The cooling water circuit has a water pump 4, which the crankshaft of the engine is driven. In the direction of flow is located behind the cylinder head 3 a thermostat valve 5 in a thermostat housing 6. The thermostatic valve 5 with cooling water channels is on the input side of the cylinder head 3 connected. Output side leads a bypass line from the thermostat valve 5 7, a heating line 8 and a water cooler supply line 9 out. In the heating line 8 is a heating heat exchanger 10 through which heating of a passenger compartment, not shown. Via a heating return 11, in which also the Bypass line 7 opens, there is a return from cooling water to water pump 4.

Die Wasserkühlerzuleitung 9 führt zu einem Wasserkühler 12, von dem aus eine Wasserpumpenzuleitung 13 abgeht, die zur Wasserpumpe 4 führt. In der Bypass-Leitung 7 ist ein Differenzdruckventil 14 angeordnet, das im Hinblick auf eine konstruktive Vereinfachung und eine einfache Montage in das Thermostatventilgehäuse 6 integriert ist. Selbstverständlich kann das Differenzdruckventil 14 jedoch auch an einer anderen Stelle als separate Einheit in der Bypass-Leitung 7 angeordnet sein.The water cooler feed line 9 leads to a water cooler 12, from which a water pump feed line 13 branches off, which leads to the water pump 4. In the bypass line 7 a differential pressure valve 14 is arranged, with a view to constructive simplification and easy installation in the thermostatic valve housing 6 is integrated. Of course it can Differential pressure valve 14, however, also on another Place as a separate unit in the bypass line 7 be arranged.

Das Differenzdruckventil 14 weist ein Schließglied 15 auf, das durch eine Spiralfeder 16 als Federeinrichtung in Schlißstellung vorgespannt ist.The differential pressure valve 14 has a closing member 15 on that by a coil spring 16 as a spring device is biased in the closed position.

Das in der Fig. 1 und in den Figuren 2 bis 4 näher dargestellte Thermostatventil 5 ist als Zweiplattenventil mit Ventilplattentellern 17 und 18 ausgebildet. Selbstverständlich ist im Rahmen der Erfindung jedoch auch eine andere Thermostatventilausgestaltung denkbar.That in Fig. 1 and in Figures 2 to 4 in more detail Thermostatic valve 5 is shown as a two-plate valve formed with valve turntables 17 and 18. Of course, is within the scope of the invention another thermostatic valve design is also conceivable.

Nachfolgend ist die Wirkungsweise des Differenzdruckventiles 14 anhand der verschiedenen Stellungen gemäß Fig. 1 und vergrößert gemäß Figuren 2 bis 4 beschrieben.Below is the operation of the differential pressure valve 14 based on the different positions according to Fig. 1 and described enlarged according to Figures 2 to 4.

Die Fig. 2 zeigt einen Kurzschlußbetrieb in der Warmlaufphase des Motors 1 bei niederen Motordrehzahlen und damit auch bei einer niederen Wasserpumpendrehzahl. In diesem Falle ist das Thermostatventil 5 in bekannter Weise so geschaltet, daß der Ventilplattenteller 17 die Wasserkühlerzuleitung 9 zum Wasserkühler 12 absperrt. Beim Stand der Technik würde in diesem Falle eine Aufteilung des Kühlwasserstromes auf die Heizleitung 8 und die Bypass-Leitung 7 erfolgen, womit für den Heizungs-Wärmetauscher 10 eine entsprechend reduzierte Warmeenergie zur Verfügung stehen würde, die aufgrund der niederen Drehzahl und der niederen Temperatur des Motors zur Erwärmung eines Fahrgastinnenraumes ungenügend wäre. Um diesen negativen Effekt zu vermeiden ist das Differenzdruckventil 14 vorgesehen. Aufgrund der niederen Drehzahl herrscht im Kühlwasserkreislauf ein entsprechend niederer Druck, der nicht ausreicht die Vorspannkraft der Federeinrichtung 16 für das Schließglied 15 zu überwinden. Dies bedeutet das Differenzdruckventil 14 befindet sich in der in der Fig. 2 dargestellten geschlossenen Stellung, wobei der Ventilplattenteller 17 die Eingangsöffnung zu der Wasserkühlerzuleitung 9 wegen der niedrigen Motortemperatur absperrt. Dadurch wird das gesamte Kühlwasser in die Heizleitung 8 eingeleitet und damit dem Heizungs-Wärmetauscher 10 zur Verfügung gestellt.2 shows a short-circuit operation in the warm-up phase of engine 1 at low engine speeds and thus also at a low water pump speed. In this case, the thermostatic valve is 5 in known way switched so that the valve platter 17 the water cooler supply line 9 to the water cooler 12 shut off. In the prior art, this would If the cooling water flow is divided among the Heating line 8 and the bypass line 7 take place, with what for the heating heat exchanger 10 one accordingly reduced heat energy would be available the due to the low speed and the low Temperature of the engine for heating a passenger interior would be insufficient. To this negative effect to avoid the differential pressure valve 14 is provided. Due to the low speed, there is a cooling water circuit a correspondingly low pressure that the preload force of the spring device is not sufficient 16 for the closing member 15 to overcome. this means the differential pressure valve 14 is in the 2 shown closed position, the valve turntable 17 the inlet opening to the water cooler supply line 9 because of the low Shuts off engine temperature. This will make the whole Cooling water introduced into the heating line 8 and thus the heating heat exchanger 10 provided.

In der Darstellung nach der Fig. 2 befindet sich zwar der Ventilplattenteller 18 auf Abstand zu der Einströmöffnung in die Bypass-Leitung 7, aber aufgrund der niederen Drehzahl hält das Schließglied 15 des Differerzdruckventiles 14 die Bypass-Leitung 7 geschlossen. Erst ab einer vorgewählten Motordrehzahl und damit einem entsprechend höheren Druck im Kühlwasserkreislauf erfolgt in Abhängigkeit von der Vorspannkraft der Spiralfeder 16 eine Öffnung der Bypass-Leitung 7. Dies kann z.B. bei einem Druck von ca. 0,3 bar und höher erfolgen. Erst ab diesem Auslegungspunkt erfolgt eine Teilströmung entsprechend Pfeil A in der Fig. 2 über das sich öffnende Schließglied 15 in die Bypass-Leitung 7 zusätzlich zu der Kühlwasserströmung über die Heizleitung 8.In the illustration according to FIG. 2 there is the valve platter 18 at a distance from the inflow opening into the bypass line 7, but due to the low speed keeps the closing member 15 of the Differential pressure valve 14 closed the bypass line 7. Only from a preselected engine speed and thus a correspondingly higher pressure in the cooling water circuit takes place depending on the preload the coil spring 16 an opening of the bypass line 7. This can e.g. at a pressure of approx. 0.3 cash and higher. Only from this design point there is a partial flow according to arrow A in the Fig. 2 on the opening closing member 15 in the Bypass line 7 in addition to the cooling water flow via the heating line 8.

Wenn die Temperatur des Motors einen vorgewählten Wert erreicht, z.B. größer 80 °C, öffnet in bekannter Weise das Thermostatventil 5 für eine Mischphase (s. Fig. 3). Dabei befinden sich die beiden Ventilplattenteller 17 und 18 in einer Mittelposition, in der alle Ausgänge aus dem Thermostatventilgehäuse 6 offen sind, nämlich die Bypass-Leitung 7, die Heizleitung 8 und die Wasserkühlerzuleitung 9. Diese Phase bedeutet den Beginn der Durchströmung des Kühlwassers über die Wasserkühlerzuleitung 9 und die Durchströmung des Wasserkühlers 12, bevor über die Wasserpumpenrückleitung 13 eine Rückleitung zur Wasserpumpe 4 erfolgt. Auch in diesem Falle besteht die Möglichkeit, daß bei niederen Motordrehzahlen das Schließglied 15 des Differenzdruckventiles 14 geschlossen wird, womit wiederum dem Heizungs-Wärmetauscher 10 verstärkt Wärmeenergie zugeführt wird.When the temperature of the motor is a preselected value reached, e.g. greater than 80 ° C, opens in a known manner the thermostatic valve 5 for a mixing phase (see Fig. 3). The two valve turntables are located there 17 and 18 in a middle position in which all exits are open from the thermostatic valve housing 6, namely the bypass line 7, the heating line 8 and the Water cooler supply line 9. This phase marks the beginning the flow of cooling water through the water cooler supply line 9 and the flow through the water cooler 12 before via the water pump return line 13 a return line to the water pump 4 takes place. Also in in this case there is a possibility that at lower Engine speeds, the closing member 15 of the differential pressure valve 14 is closed, which in turn the Heating heat exchanger 10 increasingly supplied thermal energy becomes.

Die Fig. 4 zeigt die Stellung der beiden Ventilplattenteller 17 und 18 im normalen Betriebszustand, z.B. bei Temperaturen von größer 100 °C. Wie ersichtlich, ist in diesem Falle das Thermostatventil 5 in Richtung der Wasserkühlerzuleitung 9 und der Heizleitung 8 voll geöffnet und die Bypass-Leitung 7 ist durch den Ventilplattenteller 18 geschlossen. Die Kühlwasserführung nach der Fig. 4 entspricht somit der bekannten Kühlwasserführung nach dem Stand der Technik.4 shows the position of the two valve turntables 17 and 18 in normal operating condition, e.g. at temperatures above 100 ° C. As can be seen in this case the thermostatic valve 5 is in the direction the water cooler supply line 9 and the heating line 8 full opened and the bypass line 7 is through the valve platter 18 closed. The cooling water supply 4 thus corresponds to the known cooling water supply According to the state of the art.

Claims (5)

Vorrichtung zur Regelung des Kühlwasserkreislaufes für einen Verbrennungsmotor, mit einem Kühler, einem Heizungs-Wärmetauscher, mit einer Wasserpumpe und mit einem Thermostatventil, das in der Warmlaufphase des Motors oder bei niedrigen Motortemperaturen zwei Kreisläufe ermöglicht, wobei ein Kreislauf zur Kühlung des Motors über eine Bypass-Leitung und ein zweiter Kreislauf zum Heizungs-Wärmetauscher über eine Heizleitung vorgesehen ist,
dadurch gekennzeichnet, daß
in der Bypass-Leitung (7) ein motordrehzahlabhängig geregeltes Differenzdruckventil (14) angeordnet ist, wobei in der Warmlaufphase oder in der Phase mit niedriger Motortemperatur bei niedrigen Drehzahlen des Motors (1) die Bypassleitung (7) gesperrt und das gesamte Kühlwasser über die Heizleitung (8) geführt ist und wobei bei höheren Drehzahlen das Differenzdruckventil (14) öffnet und die Bypass-Leitung (7) freigibt, wobei eine mengenmäßige Aufteilung des Kühlwassers in Abhängigkeit von der Auslegung des Differenzdruckventiles (14) über die Bypass-Leitung (7) und die Heizleitung (8) erfolgt.Device for regulating the cooling water circuit for an internal combustion engine, with a cooler, a heating heat exchanger, with a water pump and with a thermostatic valve, which enables two circuits in the warm-up phase of the engine or at low engine temperatures, one circuit for cooling the engine via a bypass -Line and a second circuit to the heating heat exchanger via a heating line is provided,
characterized in that
In the bypass line (7) there is a differential pressure valve (14) which is regulated as a function of the engine speed, the bypass line (7) being blocked in the warm-up phase or in the phase with low engine temperature at low engine speeds (1) and all the cooling water via the heating line (8) is guided and at higher speeds the differential pressure valve (14) opens and the bypass line (7) opens, whereby a quantitative division of the cooling water depending on the design of the differential pressure valve (14) via the bypass line (7) and the heating line (8) takes place. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß
das Differenzdruckventil (14) mit einer Federeinrichtung (16) zur Vorspannung in Schließstellung versehen ist.Device according to claim 1,
characterized in that
the differential pressure valve (14) is provided with a spring device (16) for pretensioning in the closed position. Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß
das Differenzdruckventil (14) im Thermostatgehäuse (6) des Thermostatventiles (5) aufgenommen ist.Device according to claim 1 or 2,
characterized in that
the differential pressure valve (14) is accommodated in the thermostat housing (6) of the thermostatic valve (5). Vorrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß
das Thermostatventil (5) als Plattenventil mit wenigstens einem Ventilplattenteller (18) ausgebildet ist, hinter dem die Bypass-Leitung (7) abzweigt.Device according to one of claims 1 to 3,
characterized in that
the thermostatic valve (5) is designed as a plate valve with at least one valve plate plate (18), behind which the bypass line (7) branches off. Vorrichtung nach Anspruch 4,
dadurch gekennzeichnet, daß
das Plattenventil als Zweiplattenventil ausgebildet ist, wobei hinter einem Plattenventilteller (18) die Bypass-Leitung (7) und hinter dem zweiten Plattenventilteller (17) eine zu dem Kühler (12) führende Wasserkühlerzuleitung (9) abzweigt.Device according to claim 4,
characterized in that
the plate valve is designed as a two-plate valve, the bypass line (7) branching behind a plate valve plate (18) and a water cooler feed line (9) leading to the cooler (12) behind the second plate valve plate (17).
EP98115482A 1997-09-23 1998-08-18 Control device of the coolant circuit for an internal combustion engine Expired - Lifetime EP0903482B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19741861 1997-09-23
DE19741861A DE19741861B4 (en) 1997-09-23 1997-09-23 Device for controlling the cooling water circuit for an internal combustion engine
US09/159,190 US6109218A (en) 1997-09-23 1998-09-23 Apparatus for regulating the coolant circuit for an internal combustion engine

Publications (3)

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EP0903482A2 true EP0903482A2 (en) 1999-03-24
EP0903482A3 EP0903482A3 (en) 1999-04-07
EP0903482B1 EP0903482B1 (en) 2003-04-23

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Family Applications (1)

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EP98115482A Expired - Lifetime EP0903482B1 (en) 1997-09-23 1998-08-18 Control device of the coolant circuit for an internal combustion engine

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US (1) US6109218A (en)
EP (1) EP0903482B1 (en)
DE (2) DE19741861B4 (en)
ES (1) ES2196441T3 (en)

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DE10052328A1 (en) * 2000-10-17 2002-04-18 Behr Gmbh & Co Differential pressure valve for use in by-pass hose in car heater comprises housing containing cylindrical chamber, valve seat being mounted on wall of chamber valve body being attached to arm, allowing it to pivot about axis of chamber
EP1293651A2 (en) * 2001-09-18 2003-03-19 Siemens Aktiengesellschaft Method and device for controlling the coolant flow in an internal combustion engine
FR2944321A1 (en) * 2009-04-14 2010-10-15 Peugeot Citroen Automobiles Sa Method for utilizing cooling circuit of heat engine of vehicle, involves actuating opening/closing unit such that case functions according to four modes, where control unit positions opening/closing unit in first mode to close outlets
EP2816207A3 (en) * 2013-06-18 2015-03-18 Bayerische Motoren Werke Aktiengesellschaft Thermostat ring slide valve and cooling system
WO2017134368A1 (en) * 2016-02-05 2017-08-10 Peugeot Citroen Automobiles Sa Method for protecting a coolant circuit of an engine against an internal overpressure
FR3079559A1 (en) * 2018-03-27 2019-10-04 Psa Automobiles Sa WATER OUTPUT BOX AND THERMAL MANAGEMENT DEVICE OF A VEHICLE MOTOR POWERTRAIN

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US6478643B2 (en) * 2000-01-07 2002-11-12 Donald M. Jolley Water pressure and volume flow regulator
DE10007241B4 (en) * 2000-02-17 2006-03-16 Daimlerchrysler Ag Cooling water circuit of an internal combustion engine
DE10043618A1 (en) 2000-09-05 2002-03-14 Daimler Chrysler Ag Cooling fluid circuit for motor vehicle internal combustion engine has valve to selectively close off coolant duct while starting for rapid warm up
DE10052327A1 (en) * 2000-10-17 2002-04-18 Behr Gmbh & Co Regulator valve for heating system in motor vehicles is located in return line and has three switching position for two independent heating circuits
US6539899B1 (en) * 2002-02-11 2003-04-01 Visteon Global Technologies, Inc. Rotary valve for single-point coolant diversion in engine cooling system
DE102005010236A1 (en) * 2005-03-05 2006-09-14 Daimlerchrysler Ag Cooling circuit for an internal combustion engine
DE102006017925A1 (en) * 2006-04-18 2007-10-31 Audi Ag Cooling system for engine of vehicle, has flowable component with differential pressure-dependent flow resistance arranged in bypass line of circuit, where bypass line connects coolant supply line, coolant return pipe and heater return pipe
CA2651087C (en) * 2006-05-08 2015-07-07 Magna Powertrain Inc. Vehicle cooling system with directed flows
US7497751B1 (en) * 2007-04-27 2009-03-03 Brunswick Corporation Alternative cooling path system for a marine propulsion device
GB201209679D0 (en) 2012-05-31 2012-07-18 Jaguar Cars Fluid flow control device and method
CN103670657B (en) * 2012-09-13 2016-09-28 北京汽车动力总成有限公司 A kind of engine-cooling system, electromotor and vehicle
WO2018104106A1 (en) * 2016-12-09 2018-06-14 Volvo Truck Corporation A cooling system valve

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DE4333110A1 (en) 1993-09-29 1995-03-16 Daimler Benz Ag Coolant circuit for motor vehicles with a liquid-cooled internal combustion engine
DE19508102C1 (en) 1995-03-08 1996-07-25 Volkswagen Ag Method for regulating a cooling circuit of an internal combustion engine, in particular for motor vehicles

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052328A1 (en) * 2000-10-17 2002-04-18 Behr Gmbh & Co Differential pressure valve for use in by-pass hose in car heater comprises housing containing cylindrical chamber, valve seat being mounted on wall of chamber valve body being attached to arm, allowing it to pivot about axis of chamber
EP1293651A2 (en) * 2001-09-18 2003-03-19 Siemens Aktiengesellschaft Method and device for controlling the coolant flow in an internal combustion engine
EP1293651A3 (en) * 2001-09-18 2005-03-16 Siemens Aktiengesellschaft Method and device for controlling the coolant flow in an internal combustion engine
FR2944321A1 (en) * 2009-04-14 2010-10-15 Peugeot Citroen Automobiles Sa Method for utilizing cooling circuit of heat engine of vehicle, involves actuating opening/closing unit such that case functions according to four modes, where control unit positions opening/closing unit in first mode to close outlets
EP2816207A3 (en) * 2013-06-18 2015-03-18 Bayerische Motoren Werke Aktiengesellschaft Thermostat ring slide valve and cooling system
WO2017134368A1 (en) * 2016-02-05 2017-08-10 Peugeot Citroen Automobiles Sa Method for protecting a coolant circuit of an engine against an internal overpressure
FR3047514A1 (en) * 2016-02-05 2017-08-11 Peugeot Citroen Automobiles Sa METHOD FOR PROTECTING A COOLING FLUID CIRCUIT OF A MOTOR AGAINST INTERNAL OVERPRESSURE
FR3079559A1 (en) * 2018-03-27 2019-10-04 Psa Automobiles Sa WATER OUTPUT BOX AND THERMAL MANAGEMENT DEVICE OF A VEHICLE MOTOR POWERTRAIN

Also Published As

Publication number Publication date
DE59808027D1 (en) 2003-06-05
ES2196441T3 (en) 2003-12-16
DE19741861B4 (en) 2004-07-22
DE19741861A1 (en) 1999-04-01
EP0903482A3 (en) 1999-04-07
EP0903482B1 (en) 2003-04-23
US6109218A (en) 2000-08-29

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