EP0870911A2 - Heat exchanger for liquid heat exchanging media - Google Patents

Heat exchanger for liquid heat exchanging media Download PDF

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Publication number
EP0870911A2
EP0870911A2 EP98103583A EP98103583A EP0870911A2 EP 0870911 A2 EP0870911 A2 EP 0870911A2 EP 98103583 A EP98103583 A EP 98103583A EP 98103583 A EP98103583 A EP 98103583A EP 0870911 A2 EP0870911 A2 EP 0870911A2
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EP
European Patent Office
Prior art keywords
heat exchanger
valve device
internal combustion
valve
inlet
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
EP98103583A
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German (de)
French (fr)
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EP0870911A3 (en
EP0870911B1 (en
Inventor
Christian Absmeier
Martin Brielmair
Ludwig Müller
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/005—Controlling temperature of lubricant
    • F01M5/007—Thermostatic control
    • 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
    • F01P3/00—Liquid cooling
    • F01P3/20—Cooling circuits not specific to a single part of engine or machine
    • 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
    • F01P2025/30—Engine incoming fluid 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
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/04—Lubricant cooler
    • 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
    • F01P2060/04—Lubricant cooler
    • F01P2060/045—Lubricant cooler for transmissions

Definitions

  • the invention relates to a heat exchanger for liquid heat exchangers, especially for different liquids in separate circuits, especially in internal combustion engines, which according to the generic features of Claim 1 on the inlet side with differently tempered streams of the first Liquid for alternately heating or cooling the second liquid is acted upon by valve control, with a valve device arranged on the inlet side controlled depending on a discharge-side temperature of one of the liquids is.
  • the intermediate temperature range is the inner cooling circuit and the outer cooling circuit the internal combustion engine is coupled to one another via a further valve, that this valve designed as a three-way valve depending on the temperature of the lubricating oil flowing out of the water / lubricating oil heat exchanger is controlled to achieve one of a cold and a warm proportion of cooling water mixed inlet of the water / lubricating oil heat exchanger.
  • An electrical temperature sensor can be used to record the lubricating oil temperature serve, the signals of the control one with the three-way valve in drive connection serve servomotor.
  • the lubricating oil can be in a drive connection with the three-way valve be supplied thermostatic device, the main danger there is that if such an arrangement is damaged, the liquids in the other circuit of the internal combustion engine and fail the internal combustion engine. Both arrangements are otherwise complex.
  • the set operating temperature of the only thermostat is for the heating of one or more oils by means of the water / oil heat exchanger disadvantageously low, so that the internal combustion engine from the water / oil heat exchanger when it heats up a relatively cold cooling water that in the warm-up phase effective internal cooling circuit is supplied with the disadvantage of a delayed Heating of the internal combustion engine.
  • the invention is based, for a generic heat exchanger the task the coolant control in particular for the phase of heating such to design that the temperature of the flowing coolant in the temperature level the temperatures of other devices connected to the cooling circuit is inexpensively adaptable.
  • the inventive arrangement of a temperature sensor in the course of Heat exchanger is advantageously of an optimally mixed Coolant is applied, which means significantly lower temperature fluctuations are connected.
  • the operating opening point can advantageously opposite a heat exchanger input control can be set significantly higher with the advantage of a higher temperature coolant in the drain of the water / oil heat exchanger, so that the temperature level of the outlet from the heat exchanger Coolant in the heating phase advantageous to the temperature level of the im inner coolant circulating coolant can be raised. Of the Warm-up of the internal combustion engine is thus significantly shortened.
  • a is used as the temperature sensor wax-filled expansion element provided with a rod-like piston, wherein the piston carries valve plates arranged at such a distance that at Every maximum stroke of the piston one valve plate in the open position and the other Valve plate is in the closed position.
  • This is an advantageously simple construction Valve device achieved.
  • this is preferably a separate one Component formed with a drain arranged between the valves, via which the valve device can be tightly connected to the inlet of the heat exchanger is, where appropriate a coupling of two sections Piston the valve device with the arranged in the heat exchanger outlet Expansion element connects.
  • This configuration according to the invention enables easy assembly and avoids jamming in the actuation of the valves.
  • the heat exchanger according to the invention is preferably used alternately Heating and cooling an oil for a drive unit using the Cooling water of an internal combustion engine equipped with a cooling water thermostat, the hot inlet of the valve device with a cooling water short circuit the internal combustion engine and the cold inlet of the valve device with a low-temperature cooler arranged in the cooling water circuit of the internal combustion engine communicates.
  • the invention is preferably used for heating and cooling the Fuel oil of the drive unit.
  • the internal combustion engine arranged temperature sensor Signals an electrical heating element arranged in the wax of the expansion element can be controlled to a higher operating opening temperature as well as a higher control temperature set expansion element depending to quickly control the oil temperature reached in the gearbox sump.
  • this Arrangement can advantageously be the temperature level of the heating phase coolant flowing from the water / oil heat exchanger almost have the temperature of the coolant circulating in the short circuit.
  • valves of the valve device with a servomotor individually or together in drive connection, the / the controlled via amplified signals from an electrical / electronic temperature sensor is or are.
  • the invention is based on an exemplary embodiment shown schematically in the drawing described.
  • the cooling water of the internal combustion engine 1 is warmed up via a Thermostats 4 circulated in the short circuit for rapid heating of the internal combustion engine 1 at operating temperature.
  • Cooling water of the internal combustion engine 1 is acted on in a valve-controlled manner at an early stage Heating the internal combustion engine oil 1.
  • This is represented by a cooling water inlet 5 of the heat exchanger 2 via its outlet 6 in connection standing valve device 3 with its hot inlet 7 via a line 8 a connecting the internal combustion engine 1 with an air / water heat exchanger 9 Lead 10 in connection.
  • Via a cooling water outlet 11 of the water / oil heat exchanger 2 is the cooling water via a line 12 and one Pump 13 supplied to the short circuit of the internal combustion engine 1.
  • the Valve device 3 also has a cold inlet 14, which is connected via a line 15 connected to a low-temperature cooler 9 'of the air / water heat exchanger 9 is.
  • valve device To control the differently tempered cooling water flows via the hot inlet 7 and the cold inlet 14, the valve device comprises 3 valves 16 and 17. These valves 16 and 17 can each be controlled separately, for example, in a map-controlled manner can be operated by a separate servomotor (not shown).
  • valves 16 and 17 are in one another fixed distance arranged operated together. As from the drawing further is the valve 16 controlling the hot inlet 7 in the open position and the cold inlet 14 controlling valve 17 controlled in the closed position.
  • This at the beginning A warm-up phase of the internal combustion engine 1 is common with the valve position increasing the heating of the internal combustion engine 1 in a controlled manner, that supplied via the hot inlet 7 hot cooling water with the cold inlet 14 supplied cooled cooling water through corresponding open positions of the two valves 16 and 17 are mixed in the valve unit 3 and thus that Cooling water supplied to the inlet 5 of the heat exchanger 2 via the outlet 6 has a mixing temperature.
  • Cooling water to avoid a delayed warm-up phase of the internal combustion engine 1 is according to the invention in the outlet 11 of the water / oil heat exchanger 2 a temperature sensor 18 for the cooling water used for heating and cooling arranged to control the hot inlet 7 and the cold inlet 14 associated valves 16 and 17 of the valve device 3.
  • the advantage of the invention Arrangement of the temperature sensor 18 in the outlet 11 of the heat exchanger 2 is that the merged via the valve device 3 different tempered cooling water flows in the heat exchanger 2 over long flow paths are well mixed with one in the outlet 11 of the heat exchanger 2 each relatively constant temperature.
  • the inlet 5 is cooler, can be arranged with the temperature sensor according to the invention 18 a significantly higher activation temperature for actuation the valves 16 and 17 may be selected.
  • a significantly higher activation temperature for actuation the valves 16 and 17 may be selected.
  • valve device 3 which is simple in construction, is used as a temperature sensor 18 a wax-filled expansion element 19 with a rod-like piston 20 provided, the piston 20 arranged at such a distance Valve plate 16 ', 17' carries that at each maximum stroke of the piston 20 a valve plate 16 'or 17' in the open position and the other valve plate 17 'or 16' in Is in the closed position.
  • this is as a separate component is formed with one between the valves 16, 17 arranged drain 6 through which the valve device 3 with the inlet 5 of the Heat exchanger 2 is tightly connectable, one of two sections 20 ', 20' ' Couplable piston 20, the valve unit 3 with the heat exchanger drain 11 arranged expansion element 19 connects.
  • the one controlled according to the invention is used Heat exchanger 2 also for alternately heating and cooling the oil one Gear 21, which forms a drive unit 22 with the internal combustion engine 1.
  • Different oils of a drive unit 22 can either, as shown, via a common water / oil heat exchanger designed according to the invention 2 or heated or heated or cooled via separate heat exchangers 2 will.
  • Such a transmission heating / cooling concept can be advantageous in its effect can be increased in that the expansion element 19 with a not shown Electric heating element is equipped, which signals one in one Oil sump of the drive unit 22 arranged, additional temperature sensor is controllable. In this way, the control temperature of the valve device 3 be shifted to higher temperatures for rapid heating the oils of the drive unit 22 with hardly delayed warm-up To reach internal combustion engine 1.

Abstract

The vehicle coolant system has a main exchanger (2) through which the main engine coolant flow and the oil coolant flow can pass. A thermostat (18,19) switches the input of the main coolant to the heat exchanger or from the heater system to the heat exchanger. The thermostat has a wax element. It operates the control valve (3) for the main heat exchanger to set up the optimum temperature difference during the cold starting phase and to regulate the relative inlet flow rates for cooler and hotter water i.e. direct from the engine or via the heating heat exchanger.

Description

Die Erfindung bezieht sich auf einen Wärmetauscher für flüssige Wärmetauschmittel, insbesondere für unterschiedliche Flüssigkeiten in gesonderten Kreisläufen, vor allem bei Brennkraftmaschinen, der gemäß den Oberbegriffsmerkmalen des Patentanspruches 1 zulaufseitig mit unterschiedlich temperierten Strömen der ersten Flüssigkeit zum wechselweisen Erwärmen oder Kühlen der zweiten Flüssigkeit ventilgesteuert beaufschlagt ist, wobei eine zulaufseitig angeordnete Ventileinrichtung in Abhängigkeit einer ablaufseitigen Temperatur einer der Flüssigkeiten gesteuert ist.The invention relates to a heat exchanger for liquid heat exchangers, especially for different liquids in separate circuits, especially in internal combustion engines, which according to the generic features of Claim 1 on the inlet side with differently tempered streams of the first Liquid for alternately heating or cooling the second liquid is acted upon by valve control, with a valve device arranged on the inlet side controlled depending on a discharge-side temperature of one of the liquids is.

Eine derartige Anordnung eines Wärmetauschers für eine Brennkraftmaschine ist beispielsweise aus der US 2,670,933 bekannt. Bei dieser bekannten Anordnung wird beim Warmlauf der Brennkraftmaschine der gesamte innere Kühlmittelumlauf über den Wasser-/Schmieröl-Wärmetauscher geleitet. Bei einer Hochbelastung der Brennkraftmaschine wird ein äußerer Kühlkreislauf über ein Thermostatventil zugeschaltet, wobei das gesamte rückgekühlte Kühlwasser über den Wasser-/Schmieröl-Wärmetauscher der Brennkraftmaschine zurückgeführt ist. In einem Temperatur-Zwischenbereich sind der innere Kühlkreislauf und der äußere Kühlkreislauf der Brennkraftmaschine über ein weiteres Ventil derart miteinander gekoppelt, daß dieses als Dreiwege-Ventil gestaltete Ventil in Abhängigkeit der Temperatur des aus dem Wasser-/Schmieröl-Wärmetauscher abfließenden Schmieröles gesteuert ist zur Erzielung einer aus einem kalten und einem warmen Kühlwasseranteil gemischten Zulauf des Wasser-/Schmieröl-Wärmetauschers.Such an arrangement of a heat exchanger for an internal combustion engine is known for example from US 2,670,933. In this known arrangement the entire internal coolant circulation when the engine is warming up passed over the water / lubricating oil heat exchanger. When the load is high Internal combustion engine is switched on an external cooling circuit via a thermostatic valve, with all the recooled cooling water via the water / lubricating oil heat exchanger the internal combustion engine is returned. In one The intermediate temperature range is the inner cooling circuit and the outer cooling circuit the internal combustion engine is coupled to one another via a further valve, that this valve designed as a three-way valve depending on the temperature of the lubricating oil flowing out of the water / lubricating oil heat exchanger is controlled to achieve one of a cold and a warm proportion of cooling water mixed inlet of the water / lubricating oil heat exchanger.

Zur Erfassung der Schmieröl-Temperatur kann ein elektrischer Temperaturfühler dienen, dessen Signale der Ansteuerung eines mit dem Dreiwege-Ventil in Antriebsverbindung stehenden Stellmotors dienen. In einer anderen Ausgestaltung kann das Schmieröl einer mit dem Dreiwege-Ventil in Antriebsverbindung stehenden thermostatischen Einrichtung zugeführt sein, wobei die wesentliche Gefahr besteht, daß bei einer Beschädigung einer derartigen Anordnung die Flüssigkeiten in den jeweils anderen Kreislauf der Brennkraftmaschine übertreten und zum Ausfall der Brennkraftmaschine führen. Beide Anordnungen sind im übrigen auch bauaufwendig.An electrical temperature sensor can be used to record the lubricating oil temperature serve, the signals of the control one with the three-way valve in drive connection serve servomotor. In another embodiment the lubricating oil can be in a drive connection with the three-way valve be supplied thermostatic device, the main danger there is that if such an arrangement is damaged, the liquids in the other circuit of the internal combustion engine and fail the internal combustion engine. Both arrangements are otherwise complex.

Dieser Nachteil ist mit einer in der P 196 37 817 vorgeschlagenen, zulaufseitig einem Wasser-/Öl-Wärmetauscher zugeordneten Ventileinrichtung behoben, die mit einem im Nebenstrom mit dem inneren Kühlmittelumlauf in Verbindung stehenden Heißzulauf und mit einem mit einem Luft-/Wasser-Wärmetauscher in Verbindung stehenden Kaltzulauf ausgebildet ist. Bei Brennkraftmaschinen mit geringem Wärmeanfall in der Warmlaufphase ist zur Erzielung einer frühen Wirkung einer Heiz- und Klimaanlage der Heißzulauf über ein thermostatisches Drosselventil und der Kaltzulauf über ein gesondertes Thermostatventil gesteuert. Bei Brennkraftmaschinen mit höherem Wärmeanfall in der Warmlaufphase kann anstelle der zwei gesondert wirksamen Thermostatventile in der Ventileinrichtung stromauf des Wasser-/Öl-Wärmetauschers ein einziges Thermostatventil die beiden Zulaufleitungen steuern. Um mit diesem einzigen Thermostaten die Temperaturen für ein Schmier- und/oder Getriebeöl über den gesamten Betriebsbereich der Brennkraftmaschine sicher zu beherrschen, sind die Betriebsöffnungstemperatur sowie die Regeltemperatur dieses Thermostaten auf den Kühlbetrieb abzustellen. Diese so festgelegte Betriebsöffnungstemperatur des einzigen Thermostaten ist jedoch für die Erwärmung eines oder mehrerer Öle mittels des Wasser-/Öl-Wärmetauschers nachteilig niedrig, so daß der Brennkraftmaschine vom Wasser-/Öl-Wärmetauscher bei dessen Erwärmung ein relativ kaltes Kühlwasser dem in der Warmlaufphase wirksamen inneren Kühlkreislauf Zugeführt ist mit dem Nachteil einer verzögerten Erwärmung der Brennkraftmaschine. This disadvantage is with an inlet side proposed in P 196 37 817 a water / oil heat exchanger associated valve device fixed that with one connected to the internal coolant circulation in the bypass Hot inlet and with an air / water heat exchanger in connection standing cold inlet is formed. In internal combustion engines with low Heat build-up in the warm-up phase is an early effect Heating and air conditioning of the hot inflow via a thermostatic throttle valve and the cold inlet is controlled by a separate thermostatic valve. In internal combustion engines with higher heat in the warm-up phase can instead of the two separately effective thermostatic valves in the valve device upstream of the Water / oil heat exchanger a single thermostatic valve the two supply lines Taxes. To use this single thermostat to set temperatures for one Lubricating and / or gear oil over the entire operating range of the internal combustion engine The operating opening temperature and the Switch the control temperature of this thermostat to cooling mode. This way However, the set operating temperature of the only thermostat is for the heating of one or more oils by means of the water / oil heat exchanger disadvantageously low, so that the internal combustion engine from the water / oil heat exchanger when it heats up a relatively cold cooling water that in the warm-up phase effective internal cooling circuit is supplied with the disadvantage of a delayed Heating of the internal combustion engine.

Der Erfindung liegt die Aufgabe zugrunde, für einen gattungsgemäßen Wärmetauscher die Kühlmittelsteuerung insbesondere für die Phase der Erwärmung derart zu gestalten, daß die Temperatur des abfließenden Kühlmittels im Temperaturniveau den Temperaturen weiterer am Kühlkreislauf angeschlossener Einrichtungen günstig anpaßbar ist.The invention is based, for a generic heat exchanger the task the coolant control in particular for the phase of heating such to design that the temperature of the flowing coolant in the temperature level the temperatures of other devices connected to the cooling circuit is inexpensively adaptable.

Diese Aufgabe ist mit dem Patentanspruch 1 dadurch gelöst, daß im Ablauf des Wärmetauschers für die erste, dem Erwärmen und Kühlen dienende Flüssigkeit ein Temperatursensor angeordnet ist zur Steuerung/Regelung gesonderter, in einem Heißzulauf und in einem Kaltzulauf der ersten Flüssigkeit in der Ventileinrichtung angeordneter Ventile.This object is achieved with claim 1 in that in the course of Heat exchanger for the first liquid used for heating and cooling Temperature sensor is arranged for control / regulation separately, in one Hot inlet and in a cold inlet of the first liquid in the valve device arranged valves.

Mit der erfindungsgemäßen Anordnung eines Temperatursensors im Ablauf des Wärmetauschers ist dieser in vorteilhafter Weise von einem optimal durchmischten Kühlmittel beaufschlagt, womit wesentlich geringere Temperaturschwankungen verbunden sind. Weiter kann in vorteilhafter Weise der Betriebsöffnungspunkt gegenüber einer Wärmetauscher-Eingangsregelung deutlich höher gelegt werden mit dem Vorteil eines höher temperierten Kühlmittels im Abfluß des Wasser-/Öl-Wärmetauschers, so daß das Temperaturniveau des vom Wärmetauscher ablaufenden Kühlmittels in der Erwärmphase vorteilhaft an das Temperaturniveau des im inneren Kühlmittelkreis umlaufenden Kühlmittels angehoben werden kann. Der Warmlauf der Brennkraftmaschine ist damit deutlich verkürzt.With the inventive arrangement of a temperature sensor in the course of Heat exchanger is advantageously of an optimally mixed Coolant is applied, which means significantly lower temperature fluctuations are connected. Furthermore, the operating opening point can advantageously opposite a heat exchanger input control can be set significantly higher with the advantage of a higher temperature coolant in the drain of the water / oil heat exchanger, so that the temperature level of the outlet from the heat exchanger Coolant in the heating phase advantageous to the temperature level of the im inner coolant circulating coolant can be raised. Of the Warm-up of the internal combustion engine is thus significantly shortened.

In einer bevorzugten Ausgestaltung der Erfindung ist als Temperatursensor ein wachsgefülltes Dehnstoffelement mit einem stangenartigen Kolben vorgesehen, wobei der Kolben in einem solchen Abstand angeordnete Ventilteller trägt, daß bei jedem maximalen Hub des Kolbens ein Ventilteller in Offenstellung und der andere Ventilteller in Schließstellung ist. Damit ist eine im Aufbau vorteilhaft einfache Ventileinrichtung erzielt. Diese ist in weiterer Ausgestaltung vorzugsweise als gesondertes Bauteil ausgebildet mit einem zwischen den Ventilen angeordneten Abfluß, über den die Ventileinrichtung mit dem Zulauf des Wärmetauschers dicht verbindbar ist, wobei gegebenenfalls ein aus zwei Abschnitten kuppelbar gestalteter Kolben die Ventileinrichtung mit dem im Wärmetauscher-Ablauf angeordneten Dehnstoffelement verbindet. Diese erfindungsgemäße Ausgestaltung ermöglicht eine einfache Montage und vermeidet Verzwängungen in der Betätigung der Ventile.In a preferred embodiment of the invention, a is used as the temperature sensor wax-filled expansion element provided with a rod-like piston, wherein the piston carries valve plates arranged at such a distance that at Every maximum stroke of the piston one valve plate in the open position and the other Valve plate is in the closed position. This is an advantageously simple construction Valve device achieved. In a further embodiment, this is preferably a separate one Component formed with a drain arranged between the valves, via which the valve device can be tightly connected to the inlet of the heat exchanger is, where appropriate a coupling of two sections Piston the valve device with the arranged in the heat exchanger outlet Expansion element connects. This configuration according to the invention enables easy assembly and avoids jamming in the actuation of the valves.

Der erfindungsgemäße Wärmetauscher findet bevorzugt Verwendung zum wechselweisen Erwärmen und Kühlen eines Öles für ein Antriebsaggregat mittels des Kühlwassers einer mit einem Kühlwasser-Thermostaten ausgerüsteten Brennkraftmaschine, wobei der Heißzulauf der Ventileinrichtung mit einer KühlwasserKurzschlußleitung der Brennkraftmaschine und der Kaltzulauf der Ventileinrichtung mit einem im Kühlwasserkreislauf der Brennkraftmaschine angeordneten Niedertemperatur-Kühler in Verbindung steht. Mit dieser Ausgestaltung wird beim Kühlen eines jeweiligen Öles mittels des Wasser-/Öl-Wärmetauschers eine besonders intensive Kühlung des Öles bzw. der Öle erzielt.The heat exchanger according to the invention is preferably used alternately Heating and cooling an oil for a drive unit using the Cooling water of an internal combustion engine equipped with a cooling water thermostat, the hot inlet of the valve device with a cooling water short circuit the internal combustion engine and the cold inlet of the valve device with a low-temperature cooler arranged in the cooling water circuit of the internal combustion engine communicates. With this configuration, when cooling a particular oil by means of the water / oil heat exchanger intensive cooling of the oil or oils achieved.

Weiter findet die Erfindung bevorzugt Verwendung zum Erwärmen und Kühlen des Getnebeöles des Antriebsaggregates. Weiter kann mit einem z.B. im Getriebeölsumpf der Brennkraftmaschine angeordneten Temperatursensor über dessen Signale ein im Wachs des Dehnstoffelementes angeordnetes elektrisches Heizelement angesteuert werden, um das auf eine höhere Betriebsöffnungstemperatur sowie eine höhere Regeltemperatur eingestellte Dehnstoffelement in Abhängigkeit der erreichten Öltemperatur im Getriebesumpf rasch offen zu steuem. Mit dieser Anordnung kann in vorteilhafter Weise das Temperaturniveau des in der Erwärmungsphase vom Wasser-/Öl-Wärmetauscher abfließendes Kühlmittels nahezu die Temperatur des im Kurzschluß umlaufenden Kühlmittels aufweisen.Furthermore, the invention is preferably used for heating and cooling the Fuel oil of the drive unit. Furthermore, e.g. in the gear oil sump the internal combustion engine arranged temperature sensor Signals an electrical heating element arranged in the wax of the expansion element can be controlled to a higher operating opening temperature as well as a higher control temperature set expansion element depending to quickly control the oil temperature reached in the gearbox sump. With this Arrangement can advantageously be the temperature level of the heating phase coolant flowing from the water / oil heat exchanger almost have the temperature of the coolant circulating in the short circuit.

In einer anderen Ausgestaltung der Erfindung stehen die Ventile der Ventileinrichtung mit einem Stellmotor einzeln oder gemeinsam in Antriebsverbindung, der/die über verstärkte Signale eines elektrischen/elektronischen Temperatursensors angesteuert ist bzw. sind.In another embodiment of the invention, the valves of the valve device with a servomotor individually or together in drive connection, the / the controlled via amplified signals from an electrical / electronic temperature sensor is or are.

Die Erfindung ist anhand eines in der Zeichnung schematisch dargestellten Ausfühtungsbeispiels beschrieben. The invention is based on an exemplary embodiment shown schematically in the drawing described.

Ein einerseits vom Kühlwasser einer Brennkraftmaschine 1 und andererseits vom Schmier- und Getriebeöl beaufschlagter Wärmetauscher 2 ist zulaufseitig mit unterschiedlich temperierten Strömen des Kühlwassers zum wechselweisen Erwärmen und Kühlen der Öle ventilgesteuert beaufschlagt, wobei eine zulaufseitig angeordnete Ventileinrichtung 3 in Abhängigkeit einer ablaufseitigen Temperatur einer der Flüssigkeiten gesteuert ist.One on the one hand from the cooling water of an internal combustion engine 1 and on the other hand from Heat exchanger 2 loaded with lubricating and gear oil is different on the inlet side tempered flows of cooling water for alternate heating and cooling of the oils acted on in a valve-controlled manner, one arranged on the inlet side Valve device 3 as a function of a temperature on the outlet side one of the liquids is controlled.

Bekanntlich ist das Kühlwasser der Brennkraftmaschine 1 im Warmlauf über einen Thermostaten 4 im Kurzschluß umgewälzt zur raschen Erwärmung der Brennkraftmaschine 1 auf Betriebstemperatur.As is known, the cooling water of the internal combustion engine 1 is warmed up via a Thermostats 4 circulated in the short circuit for rapid heating of the internal combustion engine 1 at operating temperature.

Um die Brennkraftmaschine 1 noch rascher auf Betriebstemperatur zu bringen, ist deren Schmieröl dem Wärmetauscher 2 zugeführt, der im Warmlaufbetrieb der Brennkraftmaschine 1 im Nebenstrom von dem im Kurzschlußbetrieb erwärmten Kühlwasser der Brennkraftmaschine 1 ventilgesteuert beaufschlagt ist zum frühzeitigen Erwärmen des Schrnieröles der Brennkraftmaschine 1. Hierfür steht die mit einem Kühlwasser-Zulauf 5 des Wärmetauschers 2 über ihren Abfluß 6 in Verbindung stehende Ventileinrichtung 3 mit ihrem Heißzulauf 7 über eine Leitung 8 mit einem die Brennkraftmaschine 1 mit einem Luft-/Wasser-Wärmetauscher 9 verbindenden Vorlauf 10 in Verbindung. Über einen Kühlwasser-Ablauf 11 des Wasser-/Öl-Wärmetauschers 2 ist das Kühlwasser über eine Leitung 12 und einer Pumpe 13 dem Kurzschluß-Kreislauf der Brennkraftmaschine 1 zugeführt. Die Ventileinrichtung 3 verfügt weiter über einen Kaltzulauf 14, der über eine Leitung 15 mit einem Niedertemperatur-Kühler 9' des Luft-/Wasser-Wärmetauschers 9 verbunden ist.In order to bring the internal combustion engine 1 to operating temperature even more quickly whose lubricating oil is supplied to the heat exchanger 2, which in the warm-up mode Internal combustion engine 1 in the bypass from that heated in short-circuit operation Cooling water of the internal combustion engine 1 is acted on in a valve-controlled manner at an early stage Heating the internal combustion engine oil 1. This is represented by a cooling water inlet 5 of the heat exchanger 2 via its outlet 6 in connection standing valve device 3 with its hot inlet 7 via a line 8 a connecting the internal combustion engine 1 with an air / water heat exchanger 9 Lead 10 in connection. Via a cooling water outlet 11 of the water / oil heat exchanger 2 is the cooling water via a line 12 and one Pump 13 supplied to the short circuit of the internal combustion engine 1. The Valve device 3 also has a cold inlet 14, which is connected via a line 15 connected to a low-temperature cooler 9 'of the air / water heat exchanger 9 is.

Zur Steuerung der unterschiedlich temperierten Kühlwasserströme über den Heißzulauf 7 und den Kaltzulauf 14 umfaßt die Ventileinrichtung 3 Ventile 16 und 17. Diese Ventile 16 und 17 können beispielsweise kennfeldgesteuert jeweils separat durch einen eigenen Stellmotor betätigt werden (nicht gezeigt).To control the differently tempered cooling water flows via the hot inlet 7 and the cold inlet 14, the valve device comprises 3 valves 16 and 17. These valves 16 and 17 can each be controlled separately, for example, in a map-controlled manner can be operated by a separate servomotor (not shown).

Gemäß der einzigen Zeichnung sind die Ventile 16 und 17 in einem gegenseitig festen Abstand angeordnet gemeinsam betätigt. Wie aus der Zeichnung ferner hervorgeht, ist das den Heißzulauf 7 steuernde Ventil 16 in Offenstellung und das den Kaltzulauf 14 steuernde Ventil 17 in Schließstellung gesteuert. Diese zu Beginn einer Warmlaufphase der Brennkraftmaschine 1 übliche Ventilstellung ist mit zunehmender Erwärmung der Brennkraftmaschine 1 gesteuert zu verändern derart, daß über den Heißzulauf 7 zugeführtes heißes Kühlwasser mit über den Kaltzulauf 14 zugeführtes gekühltes Kühlwasser durch entsprechende Offenstellungen der beiden Ventile 16 und 17 in der Ventileinheit 3 gemischt sind und somit das über den Abfluß 6 dem Zulauf 5 des Wärmetauschers 2 zugeführte Kühlwasser eine Mischtemperatur aufweist. Die Zumischung von kaltem Kühlwasser ist um so intensiver, je höher die Temperatur des aus dem Vorlauf 10 über die Leitung 8 und den Heißzulauf 7 zugeführten Kühlwassers aus dem Kurzschlußbetrieb der Brennkraftmaschine ist, insbesondere bei kennfeldgesteuerten/-geregelten Kühlwasser-Temperaturen von 100°C und mehr.According to the single drawing, the valves 16 and 17 are in one another fixed distance arranged operated together. As from the drawing further is the valve 16 controlling the hot inlet 7 in the open position and the cold inlet 14 controlling valve 17 controlled in the closed position. This at the beginning A warm-up phase of the internal combustion engine 1 is common with the valve position increasing the heating of the internal combustion engine 1 in a controlled manner, that supplied via the hot inlet 7 hot cooling water with the cold inlet 14 supplied cooled cooling water through corresponding open positions of the two valves 16 and 17 are mixed in the valve unit 3 and thus that Cooling water supplied to the inlet 5 of the heat exchanger 2 via the outlet 6 has a mixing temperature. The addition of cold cooling water is all the more more intense, the higher the temperature of the flow 10 through line 8 and the hot inlet 7 supplied cooling water from the short-circuit operation of the Internal combustion engine is, especially at map-controlled / regulated cooling water temperatures of 100 ° C and more.

Zur Erzielung einer hohen Regelgüte der Ventileinrichtung 3 sowie einer hohen Temperatur des aus dem Wärmetauscher 2 über den Abfluß 11 ablaufenden Kühlwassers zur Vermeidung einer verzögerten Warmlaufphase der Brennkraftmaschine 1 ist erfindungsgemäß im Ablauf 11 des Wasser-/Öl-Wärmetauschers 2 für das zum Erwärmen und Kühlen dienende Kühlwasser ein Temperatursensor 18 angeordnet zur Steuerung/Regelung der dem Heißzulauf 7 und dem Kaltzulauf 14 zugeordneten Ventile 16 und 17 der Ventileinrichtung 3. Der Vorteil der erfindungsgemäßen Anordnung des Temperatursensors 18 im Ablauf 11 des Wärmetauschers 2 ist, daß die über die Ventileinrichtung 3 zusammengeführten unterschiedlich temperierten Kühlwasserströme im Wärmetauscher 2 über lange Strömungswege gut durchmischt sind mit einer im Ablauf 11 des Wärmetauschers 2 jeweils relativ konstanten Temperatur. Da beim Erwärmen des Schmier- und Getriebeöles mittels des Wärmetauschers 2 das Kühlwasser im Ablauf 11 gegenüber dem Zulauf 5 kühler ist, kann mit dem erfindungsgemäß angeordneten Temperatursensor 18 eine wesentlich höhere Aktivierungs-Temperatur für die Betätigung der Ventile 16 und 17 gewählt sein. Mittels der jeweiligen, relativ konstanten Mischtemperatur im Ablauf 11 des Wärmetauschers 2 ergibt sich in Verbindung mit einer relativ hoch wählbaren Aktivierungs-Temperatur des Temperatursensors 18 eine hohe Regelgüte sowie ein relativ hohes Temperaturniveau des aus dem Ablauf 11 über die Leitung 12 und die Pumpe 13 in den Kurzschluß-Kreislauf der Brennkraftmaschine 1 während der Warmlaufphase zuströmenden Kühlwassers. To achieve a high control quality of the valve device 3 and a high one Temperature of the outlet from the heat exchanger 2 via the drain 11 Cooling water to avoid a delayed warm-up phase of the internal combustion engine 1 is according to the invention in the outlet 11 of the water / oil heat exchanger 2 a temperature sensor 18 for the cooling water used for heating and cooling arranged to control the hot inlet 7 and the cold inlet 14 associated valves 16 and 17 of the valve device 3. The advantage of the invention Arrangement of the temperature sensor 18 in the outlet 11 of the heat exchanger 2 is that the merged via the valve device 3 different tempered cooling water flows in the heat exchanger 2 over long flow paths are well mixed with one in the outlet 11 of the heat exchanger 2 each relatively constant temperature. Because when heating the lubricating and gear oil by means of the heat exchanger 2 opposite the cooling water in the outlet 11 the inlet 5 is cooler, can be arranged with the temperature sensor according to the invention 18 a significantly higher activation temperature for actuation the valves 16 and 17 may be selected. By means of the respective, relatively constant Mixing temperature in the outlet 11 of the heat exchanger 2 results in connection with a relatively high selectable activation temperature of the temperature sensor 18 a high control quality and a relatively high temperature level from the Drain 11 via the line 12 and the pump 13 in the short circuit Internal combustion engine 1 during the warm-up phase inflowing cooling water.

Zur Erzielung einer im Aufbau einfachen Ventileinrichtung 3 ist als Tempertursensor 18 ein wachsgefülltes Dehnstoffelement 19 mit einem stangenartigen Kolben 20 vorgesehen, wobei der Kolben 20 in einem solchen Abstand angeordnete Ventilteller 16', 17' trägt, daß bei jedem maximalen Hub des Kolbens 20 ein Ventilteller 16' bzw. 17' in Offenstellung und der andere Ventilteller 17' bzw. 16' in Schließstellung ist. Zur weiteren Vereinfachung der Ventileinrichtung 3 ist diese als ein gesondertes Bauteil ausgebildet mit einem zwischen den Ventilen 16, 17 angeordneten Abfluß 6, über den die Ventileinrichtung 3 mit dem Zulauf 5 des Wärmetauschers 2 dicht verbindbar ist, wobei ein aus zwei Abschnitten 20', 20'' kuppelbar gestalteter Kolben 20 die Ventileinheit 3 mit dem im Wärmetauscher-Ablauf 11 angeordneten Dehnstoffelement 19 verbindet.To achieve a valve device 3 which is simple in construction, is used as a temperature sensor 18 a wax-filled expansion element 19 with a rod-like piston 20 provided, the piston 20 arranged at such a distance Valve plate 16 ', 17' carries that at each maximum stroke of the piston 20 a valve plate 16 'or 17' in the open position and the other valve plate 17 'or 16' in Is in the closed position. To further simplify the valve device 3, this is as a separate component is formed with one between the valves 16, 17 arranged drain 6 through which the valve device 3 with the inlet 5 of the Heat exchanger 2 is tightly connectable, one of two sections 20 ', 20' ' Couplable piston 20, the valve unit 3 with the heat exchanger drain 11 arranged expansion element 19 connects.

Wie aus der Zeichnung weiter hervorgeht, dient der erfindungsgemäß gesteuerte Wärmetauscher 2 auch zum wechselweisen Erwärmen und Kühlen des Öles eines Getriebes 21, das mit der Brennkraftmaschine 1 ein Antriebsaggregat 22 bildet.As is further evident from the drawing, the one controlled according to the invention is used Heat exchanger 2 also for alternately heating and cooling the oil one Gear 21, which forms a drive unit 22 with the internal combustion engine 1.

Unterschiedliche Öle eines Antriebsaggregates 22 können entweder, wie gezeigt, über einen gemeinsamen, erfindungsgemäß gestalteten Wasser-/Öl-Wärmetauscher 2 oder über gesonderte Wärmetauscher 2 erwärmt bzw. geheizt oder gekühlt werden. Ein derartiges Getriebeheiz-/kühl-Konzept kann in seiner Wirkung vorteilhaft dadurch gesteigert werden, daß das Dehnstoffelement 19 mit einem nicht gezeigten, elektrischen Heizelement ausgerüstet ist, das über Signale eines in einem Ölsumpf des Antriebsaggregates 22 angeordneten, zusätzlichen Temperatursensors ansteuerbar ist. Auf diese Weise kann die Regeltemperatur der Ventileinrichtung 3 zu höheren Temperaturen verschoben werden, um ein rasches Erwärmen der Öle des Antriebsaggregates 22 bei kaum verzögertem Warmlauf der Brennkraftmaschine 1 zu erreichen.Different oils of a drive unit 22 can either, as shown, via a common water / oil heat exchanger designed according to the invention 2 or heated or heated or cooled via separate heat exchangers 2 will. Such a transmission heating / cooling concept can be advantageous in its effect can be increased in that the expansion element 19 with a not shown Electric heating element is equipped, which signals one in one Oil sump of the drive unit 22 arranged, additional temperature sensor is controllable. In this way, the control temperature of the valve device 3 be shifted to higher temperatures for rapid heating the oils of the drive unit 22 with hardly delayed warm-up To reach internal combustion engine 1.

Claims (7)

Wärmetauscher für flüssige Wärmetauschmittel, insbesondere für unterschiedliche Flüssigkeiten in gesonderten Kreisläufen, vor allem bei Brennkraftmaschinen, der zulaufseitig mit unterschiedlich temperierten Strömen der ersten Flüssigkeit zum wechselweisen Erwärmen oder Kühlen der zweiten Flüssigkeit ventilgesteuert beaufschlagt ist, wobei eine zulaufseitig angeordnete Ventileinrichtung (3) in Abhängigkeit einer ablaufseitigen Temperatur einer der Flüssigkeiten gesteuert ist,
dadurch gekennzeichnet, daß im Ablauf (11) des Wärmetauschers (2) für die erste, dem Erwärmen und Kühlen dienende Flüssigkeit ein Temperatursensor (18 zw. 19) angeordnet ist zur Steuerung/Regelung gesonderter, in einem Heißzulauf (7) und in einem Kaltzulauf (14) der ersten Flüssigkeit in der Ventileinrichtung (3) angeordneter Ventile (16, 17). Heat exchangers for liquid heat exchangers, in particular for different liquids in separate circuits, especially in internal combustion engines, the valve side is acted upon by valve-controlled flows of different temperatures for alternately heating or cooling the second liquid, wherein a valve device (3) arranged on the inlet side is controlled as a function of an outlet-side temperature of one of the liquids,
characterized, that in the outlet (11) of the heat exchanger (2) for the first heating and cooling liquid, a temperature sensor (18 and 19) is arranged for control / regulation separately, in a hot inlet (7) and in a cold inlet (14) the first liquid in the valve device (3) arranged valves (16, 17). Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, daß als Temperatursensor (18) ein wachsgefülltes Dehnstoffelement (19) mit einem stangenartigen Kolben (20) vorgesehen ist, wobei der Kolben (20) in einem solchen Abstand angeordnete Ventilteller (16', 17') trägt, daß bei jedem maximalen Hub des Kolbens (20) ein Ventilteller (16', 17') in Offenstellung und der andere Ventilteller (17', 16') in Schließstellung ist. Heat exchanger according to claim 1, characterized in that a wax-filled expansion element (19) with a rod-like piston (20) is provided as a temperature sensor (18), wherein the piston (20) at such a distance arranged valve plate (16 ', 17') contributes that Each maximum stroke of the piston (20) is a valve plate (16 ', 17') in the open position and the other valve plate (17 ', 16') in the closed position. Wärmetauscher nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Ventileinrichtung (3) als gesondertes Baute ausgebildet ist mit einem zwischen den Ventilen (16, 17) angeordneten Abfluß (6), über den die Ventileinrichtung (3) mit einem Zulauf (5) des Wärmetauschers (2) dicht verbindbar ist, wobei gegebenenfalls ein aus zwei Abschnitten (20', 20'') kuppelbar gestalteter Kolben (20) die Ventileinrichtung (3) mit dem im Wärmetauscher-Ablauf (11) angeordneten Dehnstoffelement (19) verbindet. Heat exchanger according to claim 1 and 2, characterized in that the valve device (3) is designed as a separate building with a drain (6) arranged between the valves (16, 17), via which the valve device (3) can be tightly connected to an inlet (5) of the heat exchanger (2), wherein if appropriate, a piston (20) which can be coupled from two sections (20 ', 20'') connects the valve device (3) to the expansion element (19) arranged in the heat exchanger outlet (11). Wärmetauscher nach den Ansprüchen 1 bis 3, gekennzeichnet durch eine Verwendung zum wechselweisen Erwärmen und Kühlen eines Öles für ein Antriebsaggregat (22) mittels des Kühlwassers einer mit einem Kühlwasser-Thermostaten (4) ausgerüsteten Brennkraftmaschine (1), wobei der Heißzulauf (7) der Ventileinrichtung (3) mit einer Kühlwasser-Kurzschlußleitung (10) der Brennkraftmaschine (1) und der Kaltzulauf (14) der Ventileinrichtung (3) mit einem im Kühlwasser-Kreislauf der Brennkraftmaschine (1) angeordneten Niedertemperatur-Kühler (9') in Verbindung steht. Heat exchanger according to claims 1 to 3, characterized by a use for alternately heating and cooling an oil for a drive unit (22) by means of the cooling water of an internal combustion engine (1) equipped with a cooling water thermostat (4), whereby the hot inlet (7) of the valve device (3) with a cooling water short-circuit line (10) of the internal combustion engine (1) and the cold inlet (14) of the valve device (3) is connected to a low-temperature cooler (9 ') arranged in the cooling water circuit of the internal combustion engine (1). Wärmetauscher nach den Ansprüchen 1 bis 4, gekennzeichnet durch die Verwendung für ein Getriebeöl des Antriebsaggregates (22).Heat exchanger according to claims 1 to 4, characterized by the Use for a gear oil of the drive unit (22). Wärmetauscher nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet daß das Dehnstoffelement (19) mit einem elektrischen Heizelement ausgerüstet ist, das über Signale eines in einem Ölsumpf des Antriebsaggregates (22) angeordneten zusätzlichen Temperatursensors ansteuerbar ist. Heat exchanger according to claims 1 to 5, characterized that the expansion element (19) is equipped with an electric heating element, the Can be controlled via signals from an additional temperature sensor arranged in an oil sump of the drive unit (22). Wärmetauscher nach den Ansprüchen 1, 4 und 6, dadurch gekennzeichnet, daß die Ventile (16, 17) der Ventileinrichtung (3) mit einem Stellmotor einzelnen oder gemeinsam in Antriebsverbindung stehen, der/die über verstärkte Signale eines elektrischen/elektronischen Temperatursensors angesteuert ist/sind. Heat exchanger according to claims 1, 4 and 6, characterized in that the valves (16, 17) of the valve device (3) are individually or jointly in drive connection with a servomotor, the / the is / are controlled via amplified signals from an electrical / electronic temperature sensor.
EP98103583A 1997-04-12 1998-03-02 Internal combustion engine with separate circuits for coolant as well as lube oil and/or transmission oil Expired - Lifetime EP0870911B1 (en)

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FR3059610A1 (en) * 2016-12-01 2018-06-08 Peugeot Citroen Automobiles Sa METHOD FOR CONTROLLING A TEMPERATURE OF GEARBOX OIL
EP3404229A1 (en) * 2017-05-16 2018-11-21 PSA Automobiles SA Control method of lube oil temperature of a combustion engine
FR3066535A1 (en) * 2017-05-16 2018-11-23 Peugeot Citroen Automobiles Sa METHOD FOR CONTROLLING A LUBRICATING OIL TEMPERATURE OF A THERMAL ENGINE

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DE59811491D1 (en) 2004-07-08
EP0870911A3 (en) 1999-07-07
US6053131A (en) 2000-04-25
EP0870911B1 (en) 2004-06-02
ES2218724T3 (en) 2004-11-16
DE19715324A1 (en) 1998-10-15

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