EP0836673B1 - Cooling fan for an internal combustion engine - Google Patents
Cooling fan for an internal combustion engine Download PDFInfo
- Publication number
- EP0836673B1 EP0836673B1 EP97918147A EP97918147A EP0836673B1 EP 0836673 B1 EP0836673 B1 EP 0836673B1 EP 97918147 A EP97918147 A EP 97918147A EP 97918147 A EP97918147 A EP 97918147A EP 0836673 B1 EP0836673 B1 EP 0836673B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fan
- accordance
- locking hook
- locking
- circuit
- 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
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
- F01P7/081—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps using clutches, e.g. electro-magnetic or induction clutches
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
- F01P7/042—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using fluid couplings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/08—Temperature
Definitions
- the invention relates to a fan for an internal combustion engine with one between a drive shaft and a fan wheel switched fluid friction clutch and with a Locking device for the fan wheel, which with the with the Fan blades equipped housing of the fluid friction clutch interacts positively.
- a fan arrangement of this type is known from DE 34 20 277 C3 known.
- Fluid friction clutch housing either mechanical operated brake or a mechanically operated locking rod assigned to the fan wheel e.g. on a cold start to stop completely and thereby prevent that the cooling air generated by the rotating fan Heating of the coolant of the internal combustion engine is delayed.
- Both the brake provided there, as well as the positive acting locking is via a memory element actuated that at a certain coolant temperature suddenly changes its shape and, since there as a memory element has provided a coil from a certain coolant temperature releases the fan wheel for rotation while it under this coolant temperature, for example at a cold start that holds the fan wheel.
- Another device of the type mentioned is from DE-A-3 842 503 known.
- the present invention has for its object a Locking device of the type mentioned in simple Way to train so that a subsequent equipment Existing fan drives and a control of the lock is possible via other parameters of the motor control.
- a bolt is a locking element provided in the space between cooling fins of the housing of the fluid friction clutch engages.
- This bar is simple formed as a stationary swiveling locking hook , the on a particular motor-fixed bracket is stored.
- This configuration makes it easier Way, existing fan drives with a fluid friction clutch, whose housing usually with approximately radial protruding cooling fins is also provided with to provide a locking device, the holder for the locking hook serving as a locking bolt largely on any Places can be attached where there is space in the engine compartment Available. The actuation of a locking hook is required also very little electrical energy.
- This configuration is then when the locking element is actuated from the ignition circuit with every starting process, and especially in the case of a cold start, the guarantee for this given that the fan wheel is stationary, so that on the one hand - at still filled clutch - the pumping process depends on the Cooling air temperature can go on, but also on the other the fan wheel also turns safely, even when the clutch is empty is prevented.
- This configuration also remains open the possibility of the locking member depending on others Activate or release signals and, for example, the Blocking element upstream a delay element, which after switching off the ignition in the event that the temperature of the coolant has not yet reached the specified value or has fallen below again, a new activation of the Locking only after a period at which the The fan wheel has come to a standstill. Damage to the Fan wheel through the mechanical interaction with the Locking element is excluded.
- the actuator can be actuated of the blocking element in an electrical circuit together with the ignition lock and an additional switch be arranged by a temperature element for detection the coolant temperature can be triggered. Through this configuration the locking element is then released in normal operation, when the coolant temperature is high enough.
- an electromagnet can be provided as the actuator, which only has the task of engaging the locking element with the Bring the fluid coupling housing.
- the performance of a such electromagnets can be very low. Hence it results also the possibility of the electromagnet from two Build windings that are in separate circuits and are only able to apply the To operate as a locking element.
- This Embodiment offers the possibility of a simple backup, with an actuation of the lock under certain Preconditions is excluded.
- the locking hook is hook-shaped with a protruding wing be provided with magnetically active material, this Wing cooperates with the electromagnet.
- This configuration enables very simple actuation in which the Energy consumption for the electromagnet is very low.
- the so designed locking hooks can finally in a simple manner be provided with a return spring and this can, um save space as possible, designed as a leaf spring be that sits firmly on the bracket and approximately parallel to the hinged part of the locking hook runs.
- the clutch housing (1) is one known fluid friction clutch (6) shown, the in a manner not shown via a central drive shaft (2), or via a V-belt wheel (3) and the housing (1), which with radial cooling and Reinforcing ribs (4) and with fan blades, not shown is provided, depending on the degree of filling of the clutch caused to turn.
- the fluid friction clutch ensures in known Way that from the housing (1) of the fluid friction clutch (6) formed fan wheel depending of the cooling air temperature rotates more or less quickly and therefore the flow in the area in front of the fluid friction clutch (6) arranged cooler, not shown promotes.
- Fluid friction clutches of this type generally work satisfactory. But you turn because of that too closed valve remaining filling levels also in the so-called Idle with where there is a cooling effect by rotating Fan blades are undesirable. This in particular in the event of a cold start of the engine, in which the Engine temperature, i.e. the temperature of the engine coolant should increase.
- the bow-shaped bracket (7) is with a screwed electromagnet (10) provided, which is approximately cylindrical is formed and held by a screw (12) is.
- the one with a connecting cable (13) with electrical energy supplied electromagnet (10) works with one of one pivotable locking hook (15) projecting wing (14) made of magnetic Material together, in Figure 1, the location of the Locking hook (15) is shown, in which the electromagnet (10) is not supplied with current, on the other hand the position in FIG. in which the electromagnet (10) is energized.
- FIGS. 2, 4 and 5 there is the latching hook (15) from a one-piece sheet metal part, which is from a Swivel axis (16) from up to a locking lug (17) rejuvenated.
- This locking hook (15) is from both sides encompassed by a leaf spring (18) which is fixed with rivets (19) attached to downwardly projecting bracket parts (20) of the holder (7) and with its upper end (18a) on the hook (15) creates.
- This leaf spring (18) endeavors to catch the hook (15) always in the position shown in Fig. 1 to keep in the he at a stop, not shown, on the bracket (7) rests under spring force. It remains in this position Hook end (17) of the housing (1) of the fluid friction clutch removed so that this with their fan blades can rotate freely and depending on the degree of filling.
- the configuration is now in a first embodiment - Fig. 6 - taken so that the electromagnet (10) in one electrical circuit (22), in which also the ignition lock is arranged with the switch (23) for the starter. There is also a temperature-dependent opening in the circuit Switch (24) and a delay element (25) are provided.
- the temperature-dependent switch (24) goes into its open position Position (24 ') e.g. when a coolant temperature is reached of 110 ° C, is lower at coolant temperatures however, as shown in dashed lines in Fig. 6, closed. Becomes therefore the switch (23) is actuated to start the vehicle, then the electromagnet (10) is energized and the hook (15) goes into its position according to Fig. 3. Blocked in this position the housing provided with the fan blades (1) the fluid friction clutch (6) and thus prevents the fan turns when the engine starts.
- the switch opens (24) and the magnet (10) is de-energized.
- the hook (15) takes its position according to FIG. 1.
- the fluid friction clutch (6) works as usual and switches the fan more or less too.
- a delay element (25) is provided, that actuation of the electromagnet (10) via prevents a certain time, which is such that the clutch must come to a standstill by the end of this time or has reached such a low speed that a Activation of the locking device no longer causes damage causes.
- This can become important, for example, when the coolant temperature is the aforementioned temperature of 110 ° C has not yet been reached and therefore the switch (24) has remained in its dashed closed position. This can be the case if the vehicle initially only one has been moved a short distance, or the coolant temperature for example on a descent back under the mentioned amount has cooled.
- the delay element (25) prevents damage to the device in such cases.
- FIG. 7 shows a variant of the circuit diagram according to FIG. 6.
- an electromagnet (10 ') is arranged, and it is in the circuit (22 ') the switch (23) of the ignition lock for actuating the starter.
- the coil of the electromagnet (10 ') consists in this Case, however, from a pull-in winding (26) and a holding winding (27), which are connected in parallel, in which additional circuit (28) the temperature-dependent Switch (24) is arranged.
- the holding winding (27) and Tightening winding (26) are designed so that they only triggering force required for actuating the locking hook (15) can apply if they both have current flowing through them are. This configuration then results in the following Mode of action:
- the temperature-dependent switch (24) is closed, so that the holding winding (27) over the circuit (28) is applied.
- the starter is operated when the switch (23) is opened, i.e. So after starting the engine, the winding (26) de-energized, the winding (27) holds the locking of the Fan upright by the locking hook (15). Your strength is so dimensioned that they can exert this holding effect.
- the switch (24) When reaching a coolant temperature greater than 110 ° C opens the switch (24).
- the holding winding (27) is also de-energized, and the fan is released.
- the temperature-dependent switch (24) gives the circuit (28) free.
- the switch (24) is closed. Will the Switch (23) actuated for the starter, then, as well in the first case, both windings (27 and 26) are energized. In this case too, the locking hook (15) is actuated and the fan locks. After running the engine opens the switch (23), the holding winding (27) holds the lock the fan upright. Reaches the coolant temperature 110 ° C, then the switch (24) opens the holding winding (27) is de-energized and the fan is released.
- the temperature-dependent switch (24) is open.
- the circuit (28) is open, the holding winding (27) therefore de-energized.
- the starter switch (23) actuated, the pulling force of the winding (26) alone is sufficient not out to actuate the locking hook (15). It takes place no locking of the fan instead.
- the starter switch (23) opens, then the pull-in winding will also open (26) de-energized so that the entire electromagnet (10 '), i.e. So the actuator with the locking hook (15) remains unactuated.
- the fan is therefore locked above a coolant temperature of 110 ° is not possible.
- the solution shown in FIG. 7 therefore has the additional advantage on that even if the thermostat switch (24) is defective should not lock the fan can, so that in the event of a fault, the cooling of the motor is always ensured (fail save).
- the entire locking device can also be retrofitted in a simple manner. It is only necessary to screw the bracket (7) in place and the electromagnet (10) in the circuit of the Integrate the ignition lock. Every time the engine starts, at which the coolant temperature is not yet high enough then automatically prevents the fan from rotating until the fan power required to cool the engine coolant becomes.
- the described embodiment uses an electromagnet in cooperation with a specially designed Swivel hook.
- electromagnets or also actuating pistons acted upon from the electrical ignition circuit provide the appropriate locking pins in the gaps press the cooling fins of the fan wheel.
- actuators are coupled to the ignition circuit and attachable to brackets that also enable subsequent attachment without design changes on the fluid friction clutches.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Die Erfindung betrifft einen Lüfter für eine Brennkraftmaschine mit einer zwischen eine Antriebswelle und ein Lüfterrad geschalteten Flüssigkeitsreibungskupplung und mit einer Feststellvorrichtung für das Lüfterrad, die mit dem mit den Lüfterschaufeln bestückten Gehäuse der Flüssigkeitsreibungskupplung formschlüssig zusammenwirkt.The invention relates to a fan for an internal combustion engine with one between a drive shaft and a fan wheel switched fluid friction clutch and with a Locking device for the fan wheel, which with the with the Fan blades equipped housing of the fluid friction clutch interacts positively.
Eine Lüfteranordung dieser Art ist aus der DE 34 20 277 C3 bekannt. Dort hat man dem mit den Lüfterschaufeln bestückten Gehäuse der Flüssigkeitsreibungskupplung entweder eine mechanisch betätigte Bremse oder eine mechanisch betätigte Arretierstange zugeordnet, um das Lüfterrad z.B. bei einem Kaltstart vollständig stillzusetzen und dadurch zu verhindern, daß die von dem mitlaufenden Ventilator erzeugte Kühlluft die Erwärmung der Kühlflüssigkeit der Brennkraftmaschine verzögert. Sowohl die dort vorsehene Bremse, als auch die formschlüssig wirkende Arretierung wird über ein Memory-Element betätigt, das bei einer bestimmten Kühlmitteltemperatur schlagartig seine Gestalt ändert und, da man dort als Memory-Element eine Wendel vorgesehen hat, ab einer bestimmten Kühlmitteltemperatur das Lüfterrad zur Drehung freigibt, während es unter dieser Kühlmitteltemperatur, also beispielsweise bei einem Kaltstart, das Lüfterrad festhält. Bei Einrichtungen dieser Art muß die Antriebsanordnung, insbesondere die Flüssigkeitsreibungskupplung entsprechend mit einer Bremse oder, wie dort vorgeschlagen ist, mit einer hohlen Antriebswelle versehen sein, durch die eine axial verschiebbare Arretierstange geführt ist. Dies ist aufwendig und läßt auch eine nachträgliche Umrüstung nicht zu. Der Umschaltvorgang kann auch ausschließlich von der Kühlmitteltemperatur ausgelöst werden und zwar unabhängig von der die Ölzu- oder abfuhr zu der Kupplung steuernden und über ein Bimetall erfaßten Lufttemperatur.A fan arrangement of this type is known from DE 34 20 277 C3 known. There you have the one equipped with the fan blades Fluid friction clutch housing either mechanical operated brake or a mechanically operated locking rod assigned to the fan wheel e.g. on a cold start to stop completely and thereby prevent that the cooling air generated by the rotating fan Heating of the coolant of the internal combustion engine is delayed. Both the brake provided there, as well as the positive acting locking is via a memory element actuated that at a certain coolant temperature suddenly changes its shape and, since there as a memory element has provided a coil from a certain coolant temperature releases the fan wheel for rotation while it under this coolant temperature, for example at a cold start that holds the fan wheel. At facilities this type of drive arrangement, in particular the fluid friction clutch accordingly with a brake or, as suggested there, with a hollow drive shaft be provided by an axially displaceable locking rod is led. This is complex and also leaves one retrofitting not to. The switching process can also triggered exclusively by the coolant temperature regardless of the oil supply or removal the clutch controlling air temperature detected via a bimetal.
Eine weitere Vorrichtung der genannten Art ist aus DE-A-3 842 503 bekannt.Another device of the type mentioned is from DE-A-3 842 503 known.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Arretiervorrichtung der eingangs genannten Art in einfacher Weise so auszubilden, daß auch eine nachträgliche Ausrüstung vorhandener Lüfterantriebe und eine Steuerung der Arretierung über andere Parameter der Motorsteuerung möglich ist.The present invention has for its object a Locking device of the type mentioned in simple Way to train so that a subsequent equipment Existing fan drives and a control of the lock is possible via other parameters of the motor control.
Diese Aufgabe wird durch einen Lüfter mit den Merkmalen des Anspruchs 1 gelöst.This task is done by a fan solved with the features of claim 1.
Gemäß der Erfindung ist als Sperrelement ein Riegel vorgesehen, der in den Zwischenraum zwischen Kühlrippen des Gehäuses der Flüssigkeitsreibungskupplung eingreift. Dieser Riegel ist in einfacher Weise als ein ortsfest verschwenkbarer Rasthaken ausgebildet , der an einer insbesondere motorfest angeordneten Halterung gelagert ist. Diese Ausgestaltung läßt es in einfacher Weise zu, vorhandene Lüfterantriebe mit einer Flüssigkeitsreibungskupplung, deren Gehäuse in der Regel mit etwa radial abstehenden Kühlrippen versehen ist, auch nachträglich mit einer Sperreinrichtung zu versehen, wobei die Halterung für den als Sperriegel dienenden Rasthaken weitgehend an beliebigen Stellen angebracht werden kann, wo Platz im Motorraum zur Verfügung steht. Die Betätigung eines Rasthakens benötigt auch sehr wenig elektrische Energie.According to the invention, a bolt is a locking element provided in the space between cooling fins of the housing of the fluid friction clutch engages. This bar is simple formed as a stationary swiveling locking hook , the on a particular motor-fixed bracket is stored. This configuration makes it easier Way, existing fan drives with a fluid friction clutch, whose housing usually with approximately radial protruding cooling fins is also provided with to provide a locking device, the holder for the locking hook serving as a locking bolt largely on any Places can be attached where there is space in the engine compartment Available. The actuation of a locking hook is required also very little electrical energy.
Durch diese Ausgestaltung wird dann, wenn das Sperrelement vom Zündkreislauf aus betätigt wird, bei jedem Anlaßvorgang, und insbesondere auch bei einem Kaltstart, die Gewähr dafür gegeben, daß das Lüfterrad stillsteht, so daß zum einen - bei noch gefüllter Kupplung - der Abpumpvorgang abhängig von der Kühllufttemperatur vor sich gehen kann, zum anderen aber auch ein Mitdrehen des Lüfterrades selbst bei leerer Kupplung sicher verhindert ist. Durch diese Ausgestaltung bleibt auch die Möglichkeit offen, das Sperrglied abhängig von anderen Signalen zu betätigen oder zu lösen und beispielsweise dem Sperrelement ein Verzögerungsglied vorzuschalten, das nach dem Abschalten der Zündung für den Fall, daß die Temperatur des Kühlmittels den vorgegebenen Wert noch nicht erreicht oder wieder unterschritten hat, eine erneute Aktivierung der Arretierung erst nach einem Zeitraum ermöglicht, zu dem das Lüfterrad zum Stillstand gekommen ist. Eine Beschädigung des Lüfterrades durch das mechanische Zusammenwirken mit dem Sperrelement wird so ausgeschlossen.This configuration is then when the locking element is actuated from the ignition circuit with every starting process, and especially in the case of a cold start, the guarantee for this given that the fan wheel is stationary, so that on the one hand - at still filled clutch - the pumping process depends on the Cooling air temperature can go on, but also on the other the fan wheel also turns safely, even when the clutch is empty is prevented. This configuration also remains open the possibility of the locking member depending on others Activate or release signals and, for example, the Blocking element upstream a delay element, which after switching off the ignition in the event that the temperature of the coolant has not yet reached the specified value or has fallen below again, a new activation of the Locking only after a period at which the The fan wheel has come to a standstill. Damage to the Fan wheel through the mechanical interaction with the Locking element is excluded.
In Weiterbildung der Erfindung kann das Stellglied zur Betätigung des Sperrelementes in einem elektrischen Schaltkreis zusammen mit dem Zündschloß und einem zusätzlichen Schalter angeordnet sein, der von einem Temperaturelement zur Erfassung der Kühlmitteltemperatur auslösbar ist. Durch diese Ausgestaltung wird im Normalbetrieb das Sperrelement dann gelöst, wenn die Kühlmitteltemperatur ausreichend hoch ist.In a further development of the invention, the actuator can be actuated of the blocking element in an electrical circuit together with the ignition lock and an additional switch be arranged by a temperature element for detection the coolant temperature can be triggered. Through this configuration the locking element is then released in normal operation, when the coolant temperature is high enough.
In Weiterbildung der Erfindung kann bei dieser Ausgestaltung als Stellglied ein Elektromagnet vorgesehen sein, der lediglich die Aufgabe hat, das Sperrelement in Eingriff mit dem Gehäuse der Flüssigkeitskupplung zu bringen. Die Leistung eines solchen Elektromagneten kann sehr niedrig sein. Daher ergibt sich auch die Möglichkeit, den Elektromagneten aus zwei Wicklungen aufzubauen, die in getrennten Stromkreisen liegen und nur bei gemeinsamer Beaufschlagung in der Lage sind, den als Sperrelement vorgesehnen Rasthaken zu betätigen. Diese Ausführungsform bietet die Möglichkeit einer einfachen Sicherung, mit der eine Betätigung der Arretierung unter bestimmten Voraussetzungen ausgeschlossen wird. In a further development of the invention can with this embodiment an electromagnet can be provided as the actuator, which only has the task of engaging the locking element with the Bring the fluid coupling housing. The performance of a such electromagnets can be very low. Hence it results also the possibility of the electromagnet from two Build windings that are in separate circuits and are only able to apply the To operate as a locking element. This Embodiment offers the possibility of a simple backup, with an actuation of the lock under certain Preconditions is excluded.
In besonders vorteilhafter Weiterbildung der Erfindung kann der Rasthaken hakenförmig mit einem abstehenden Flügel aus magnetisch wirksamem Material versehen sein, wobei dieser Flügel mit dem Elektromagnet zusammenwirkt. Diese Ausgestaltung ermöglicht eine sehr einfache Betätigung, bei der der Energieaufwand für den Elektromagneten sehr gering ist. Der so gestaltete Rasthaken kann schließlich in einfacher Weise mit einer Rückstellfeder versehen sein und diese kann, um möglichst Bauraum zu sparen, als eine Blattfeder ausgebildet werden, die fest an der Halterung sitzt und etwa parallel zu dem angelenkten Teil des Rasthakens verläuft.In a particularly advantageous development of the invention the locking hook is hook-shaped with a protruding wing be provided with magnetically active material, this Wing cooperates with the electromagnet. This configuration enables very simple actuation in which the Energy consumption for the electromagnet is very low. The so designed locking hooks can finally in a simple manner be provided with a return spring and this can, um save space as possible, designed as a leaf spring be that sits firmly on the bracket and approximately parallel to the hinged part of the locking hook runs.
Die Erfindung ist anhand eines Ausführungsbeispieles in der Zeichnung dargestellt und wird im folgenden erläutert. Es zeigen:
- Fig. 1
- eine teilweise aufgeschnittene Seitenansicht der Kupplungsanordnung für einen erfindungsgemäßen Lüfter mit einer Feststellvorrichtung in ihrer gelösten Stellung,
- Fig. 2
- die Ansicht der Anordnung nach Fig. 1 in Richtung der Schnittlinie II-II gesehen, jedoch in der Lage der Feststellvorrichtung nach Fig. 3,
- Fig. 3
- die Darstellung der Feststellvorrichtung der Fig. 1, jedoch in der Stellung zum Arretieren des Lüfterrades,
- Fig. 4
- die Draufsicht auf die Feststellvorrichtung der Fig. 3 in Richtung des Pfeiles IV der Fig. 3 gesehen,
- Fig. 5
- die Stirnansicht der Feststellvorrichtung nach Fig. 3 in Richtung des Pfeiles V der Fig. 3 gesehen,
- Fig. 6
- die schematische Darstellung eines Stromlaufplanes- zur Energieversorgung der Feststellvorrichtung, und
- Fig. 7
- eine Variante des Stromlaufplanes nach Fig. 6.
- Fig. 1
- 3 shows a partially cut-away side view of the coupling arrangement for a fan according to the invention with a locking device in its released position,
- Fig. 2
- 1 seen in the direction of section line II-II, but in the position of the locking device according to FIG. 3,
- Fig. 3
- the representation of the locking device of FIG. 1, but in the position for locking the fan wheel,
- Fig. 4
- 3 seen in the direction of arrow IV of FIG. 3,
- Fig. 5
- 3 seen in the direction of arrow V of FIG. 3,
- Fig. 6
- the schematic representation of a circuit diagram for power supply to the locking device, and
- Fig. 7
- a variant of the circuit diagram of FIG. 6.
In den Figuren 1 und 2 ist das Kupplungsgehäuse (1) einer an sich bekannten Flüssigkeitsreibungskupplung (6) gezeigt, die in nicht näher gezeigter Weise über eine zentrale Antriebswelle (2), oder über ein Keilriemenrad (3) angetrieben ist und das Gehäuse (1), das mit radial verlaufenden Kühl- und Verstärkungsrippen (4) und mit nicht gezeigten Lüfterschaufeln versehen ist, in Abhängigkeit vom Füllungsgrad der Kupplung zu einer Drehung veranlaßt.In Figures 1 and 2, the clutch housing (1) is one known fluid friction clutch (6) shown, the in a manner not shown via a central drive shaft (2), or via a V-belt wheel (3) and the housing (1), which with radial cooling and Reinforcing ribs (4) and with fan blades, not shown is provided, depending on the degree of filling of the clutch caused to turn.
Beim gezeigten Ausführungsbeispiel ist koaxial zu dem Kupplungsgehäuse (1) auf der Antriebswelle (2) auch noch eine Wasserpumpe (5) angeordnet, die ortsfest, z.B. am Motorblock angebaut ist. Die Flüssigkeitsreibungskupplung sorgt in bekannter Weise dafür, daß das vom Gehäuse (1) der Flüssigkeitsreibungskupplung (6) gebildete Lüfterrad sich abhängig von der Kühllufttemperatur mehr oder weniger schnell dreht und daher die Durchströmung eines im Bereich vor der Flüssigkeitsreibungskupplung (6) angeordneten, nicht gezeigten Kühlers fördert. Dies geschieht in bekannter Weise über ein als Bimetall ausgebildetes Thermoelement, das der Stirnseite der Flüssigkeitsreibungskupplung zugeordnet ist und das in bekannter Weise ein Überströmventil zwischen einer Vorratskammer in der Flüssigkeitsreibungskupplung (6) und einer Arbeitskammer öffnet, so daß bei höheren Temperaturen sich die Arbeitskammer füllt und das als Lüfterrad ausgebildete Gehäuse (1) der Kupplung über Scherkräfte von der angetriebenen Kupplungshälfte mitgenommen wird.In the embodiment shown is coaxial with the clutch housing (1) on the drive shaft (2) also one Water pump (5) arranged to be stationary, e.g. on the engine block is grown. The fluid friction clutch ensures in known Way that from the housing (1) of the fluid friction clutch (6) formed fan wheel depending of the cooling air temperature rotates more or less quickly and therefore the flow in the area in front of the fluid friction clutch (6) arranged cooler, not shown promotes. This is done in a known manner as a Bimetallic thermocouple, the front of the Fluid friction clutch is assigned and that in a known manner Way an overflow valve between a storage chamber in the fluid friction clutch (6) and a working chamber opens, so that at higher temperatures Working chamber fills and the housing designed as a fan wheel (1) the clutch over shear forces from the driven Coupling half is taken.
Flüssigkeitsreibungskupplungen dieser Art arbeiten im allgemeinen zufriedenstellend. Sie drehen aber wegen des auch bei geschlossenem Ventil verbleibenden Füllungsgrades auch im sogenannten Leerlauf mit, wo an sich ein Kühleffekt durch umlaufende Lüfterschaufeln unerwünscht ist. Dies insbesondere bei einem Kaltstart des Motors, bei dem möglichst schnell die Motortemperatur, d.h. die Temperatur des Kühlmittels des Motors ansteigen soll.Fluid friction clutches of this type generally work satisfactory. But you turn because of that too closed valve remaining filling levels also in the so-called Idle with where there is a cooling effect by rotating Fan blades are undesirable. This in particular in the event of a cold start of the engine, in which the Engine temperature, i.e. the temperature of the engine coolant should increase.
Gemäß der Erfindung ist daher an der ortsfesten Wasserpumpe (5) eine Halterung (7) in der Form eines Winkelbügels angeschraubt und zwar mit Hilfe von Schrauben (8), die durch Öffnungen (9) in einem Flanschteil (11) der Halterung (7) hindurchgreifen. Die bügelförmige Halterung (7) ist mit einem angeschraubten Elektromagnet (10) versehen, der etwa zylindrisch ausgebildet ist und durch eine Schraube (12) gehalten ist. Der über ein Anschlußkabel (13) mit elektrischer Energie versorgte Elektromagnet (10) arbeitet mit einem von einem schwenkbaren Rasthaken (15) abragenden Flügel (14) aus magnetischem Material zusammen, wobei in Figur 1 die Lage des Rasthakens (15) gezeigt ist, in der der Elektromagnet (10) nicht strombeaufsschlagt ist, in der Figur 3 dagegen die Lage, in der der Elektromagnet (10) strombeaufschlagt ist.According to the invention is therefore at the fixed water pump (5) a bracket (7) screwed in the form of an angle bracket with the help of screws (8) through openings (9) reach through in a flange part (11) of the holder (7). The bow-shaped bracket (7) is with a screwed electromagnet (10) provided, which is approximately cylindrical is formed and held by a screw (12) is. The one with a connecting cable (13) with electrical energy supplied electromagnet (10) works with one of one pivotable locking hook (15) projecting wing (14) made of magnetic Material together, in Figure 1, the location of the Locking hook (15) is shown, in which the electromagnet (10) is not supplied with current, on the other hand the position in FIG. in which the electromagnet (10) is energized.
Wie die Figuren 2, 4 und 5 erkennen lassen, besteht der Rasthaken (15) aus einem einstückigen Blechteil, das sich von einer Schwenkachse (16) aus nach oben zu einer Rastnase (17) verjüngt. Dieser Rasthaken (15) wird von beiden Seiten her von einer Blattfeder (18) umgriffen, die mit Nieten (19) fest an nach unten ragenden Bügelteilen (20) der Halterung (7) befestigt ist und sich mit ihrem oberen Ende (18a) an den Haken (15) anlegt. Diese Blattfeder (18) ist bestrebt, den Haken (15) stets in der in der Fig. 1 gezeigten Lage zu halten, in der er an einem nicht näher gezeigten Anschlag an der Halterung (7) unter Federkraft anliegt. In dieser Lage bleibt das Hakenende (17) von dem Gehäuse (1) der Flüssigkeitsreibungskupplung entfernt, so daß dieses sich mit ihren Lüfterschaufeln frei und je nach Füllungsgrad drehen kann.As can be seen in FIGS. 2, 4 and 5, there is the latching hook (15) from a one-piece sheet metal part, which is from a Swivel axis (16) from up to a locking lug (17) rejuvenated. This locking hook (15) is from both sides encompassed by a leaf spring (18) which is fixed with rivets (19) attached to downwardly projecting bracket parts (20) of the holder (7) and with its upper end (18a) on the hook (15) creates. This leaf spring (18) endeavors to catch the hook (15) always in the position shown in Fig. 1 to keep in the he at a stop, not shown, on the bracket (7) rests under spring force. It remains in this position Hook end (17) of the housing (1) of the fluid friction clutch removed so that this with their fan blades can rotate freely and depending on the degree of filling.
Im übrigen ist aus Fig. 4 erkennbar, daß die Nase (17) des Hakens (15) einseitig angeschrägt ist. Die Abschrägung ist dabei entgegen der in Fig. 4 angedeuteten Drehrichtung (26) vorgenommen, so daß bei Betätigung des Rasthakens (15) diese Nase (17) in einfacher Weise in den Zwischenraum (21) zwischen zwei Rippen (4) einrastet.4 that the nose (17) of the Hook (15) is chamfered on one side. The bevel is thereby contrary to the direction of rotation indicated in FIG. 4 (26) made so that when the locking hook (15) is actuated Nose (17) between the space (21) in a simple manner two ribs (4) engage.
Wird jedoch der Elektromagnet (10) mit Strom beaufschlagt, dann wird der Haken (15) über den an ihm befestigten Flügel (14), der sich an den Elektromagneten (10) anlegt, in die Stellung nach Fig. 3 gebracht, in der das freie Ende (17), wie Fig. 2 erkennbar macht, in den Zwischenraum (21) zwischen zwei benachbarten Kühl- und Verstärkungsrippen (4) eingreifen kann und so das Kupplungsgehäuse an einer Drehung hindert.However, if current is applied to the electromagnet (10), then the hook (15) over the wing attached to it (14), which puts on the electromagnet (10), in the 3 position in which the free end (17), 2 shows in the space (21) between engage two adjacent cooling and reinforcing ribs (4) can and thus prevents the clutch housing from rotating.
Die Ausgestaltung ist nun bei einer ersten Ausführungsform - Fig. 6 - so getroffen, daß der Elektromagnet (10) in einem elektrischen Schaltkreis (22) liegt, in dem auch das Zündschloß mit dem Schalter (23) für den Anlasser angeordnet ist. In dem Schaltkreis ist ferner ein temperaturabhängig öffnender Schalter (24) und ein Verzögerungselement (25) vorgesehen. Der temperaturabhängige Schalter (24) geht in seine geöffnete Stellung (24') z.B. beim Erreichen einer Kühlmitteltemperatur von 110°C, ist bei Kühlmitteltemperaturen darunter jedoch, wie gestrichelt in Fig. 6 gezeigt, geschlossen. Wird daher der Schalter (23) zum Start des Fahrzeuges betätigt, dann wird der Elektromagnet (10) erregt, und der Haken (15) geht in seine Stellung nach Fig. 3. In dieser Stellung blokkiert er das mit den Lüfterschaufeln versehene Gehäuse (1) der Flüssigkeitsreibungskupplung (6) und verhindert so nach dem Start des Motors ein Mitdrehen des Lüfters.The configuration is now in a first embodiment - Fig. 6 - taken so that the electromagnet (10) in one electrical circuit (22), in which also the ignition lock is arranged with the switch (23) for the starter. There is also a temperature-dependent opening in the circuit Switch (24) and a delay element (25) are provided. The temperature-dependent switch (24) goes into its open position Position (24 ') e.g. when a coolant temperature is reached of 110 ° C, is lower at coolant temperatures however, as shown in dashed lines in Fig. 6, closed. Becomes therefore the switch (23) is actuated to start the vehicle, then the electromagnet (10) is energized and the hook (15) goes into its position according to Fig. 3. Blocked in this position the housing provided with the fan blades (1) the fluid friction clutch (6) and thus prevents the fan turns when the engine starts.
Ist nach einer gewissen Betriebszeit die Kühlmitteltemperatur von beispielsweise 110°C erreicht, so öffnet der Schalter (24) und der Magnet (10) wird stromlos. Der Haken (15) nimmt seine Stellung nach Fig. 1 ein. Die Flüssigkeitsreibungskupplung (6) arbeitet wie üblich und schaltet den Lüfter mehr oder weniger zu.Is the coolant temperature after a certain operating time reached, for example, 110 ° C, the switch opens (24) and the magnet (10) is de-energized. The hook (15) takes its position according to FIG. 1. The fluid friction clutch (6) works as usual and switches the fan more or less too.
Um zu verhindern, daß bei einem Neustart des Motors der Sperrhaken (15) trotz noch drehender Kupplung betätigt wird und dadurch möglicherweise eine Beschädigung von Kupplung und Haken eintreten kann, wird ein Verzögerungsglied (25) vorgesehen, daß eine Betätigung des Elektromagneten (10) über eine bestimmte Zeit hin verhindert, die so bemessen ist, daß die Kupplung bis zum Ablauf dieser Zeit sicher zum Stillstand oder zu einer so geringen Drehzahl gekommen ist, daß eine Einschaltung der Feststellvorrichtung keine Beschädigung mehr hervorruft. Dies kann beispielsweise dann wichtig werden, wenn die Kühlmitteltemperatur die vorher erwähnte Temperatur von 110°C noch nicht erreicht hat und daher der Schalter (24) in seiner gestrichelten Schließstellung verblieben ist. Dies kann dann der Fall sein, wenn das Fahrzeug zunächst nur eine kurze Strecke bewegt worden ist, oder sich die Kühlmitteltemperatur beispielsweise bei einer Talfahrt wieder unter den genannten Betrag abgekühlt hat. Das Verzögerungsglied (25) verhindert in solchen Fällen eine Beschädigung der Einrichtung.To prevent the engine from restarting when the engine is restarted Locking hook (15) is actuated despite the clutch still rotating and possibly damage to the coupling and Can occur, a delay element (25) is provided, that actuation of the electromagnet (10) via prevents a certain time, which is such that the clutch must come to a standstill by the end of this time or has reached such a low speed that a Activation of the locking device no longer causes damage causes. This can become important, for example, when the coolant temperature is the aforementioned temperature of 110 ° C has not yet been reached and therefore the switch (24) has remained in its dashed closed position. This can be the case if the vehicle initially only one has been moved a short distance, or the coolant temperature for example on a descent back under the mentioned amount has cooled. The delay element (25) prevents damage to the device in such cases.
Die Fig. 7 zeigt eine Variante des Stromlaufplanes nach Fig. 6. Hier ist in dem elektrischen Schaltkreis (22'), wie auch beim ersten Ausführungsbeispiel, ein Elektromagnet (10') angeordnet, und es ist im Stromkreislauf (22') der Schalter (23) des Zündschlosses zur Betätigung des Anlassers vorgesehen. Die Spule des Elektromagneten (10') besteht in diesem Fall jedoch aus einer Anzugswicklung (26) und aus einer Haltewicklung (27), die parallel geschaltet sind, wobei in dem zusätzlichen Schaltkreis (28) der temperaturabhängig wirkende Schalter (24) angeordnet ist. Die Haltewicklung (27) und die Anzugswicklung (26) sind so ausgelegt, daß sie nur dann die für die Betätigung des Rasthakens (15) notwendige Auslösekraft aufbringen können, wenn sie beide stromdurchflossen sind. Durch diese Ausgestaltung ergibt sich dann folgende Wirkungsweise:FIG. 7 shows a variant of the circuit diagram according to FIG. 6. Here is in the electrical circuit (22 ') as well in the first embodiment, an electromagnet (10 ') is arranged, and it is in the circuit (22 ') the switch (23) of the ignition lock for actuating the starter. The coil of the electromagnet (10 ') consists in this Case, however, from a pull-in winding (26) and a holding winding (27), which are connected in parallel, in which additional circuit (28) the temperature-dependent Switch (24) is arranged. The holding winding (27) and Tightening winding (26) are designed so that they only triggering force required for actuating the locking hook (15) can apply if they both have current flowing through them are. This configuration then results in the following Mode of action:
In diesem Fall ist der temperaturabhängige Schalter (24) geschlossen, so daß die Haltewicklung (27) über den Stromkreis (28) beaufschlagt ist. Wird der Schalter (23) am Zündschloß für den Anlasser betätigt, dann wird auch der Stromkreis (22') geschlossen und die Anzugswicklung (26) ist bestromt. Da beide Wicklungen (26 und 27) beaufschlagt sind, kann der Rasthaken (15) betätigt werden. Er arretiert den Lüfter.In this case the temperature-dependent switch (24) is closed, so that the holding winding (27) over the circuit (28) is applied. The switch (23) on the ignition lock actuated for the starter, then also the circuit (22 ') closed and the pull-in winding (26) is energized. Since both windings (26 and 27) are applied, the Locking hooks (15) are operated. It locks the fan.
Wird bei Öffnen des Schalters (23) für die Betätigung des Anlassers, d.h. also nach dem Anlassen des Motors die Wicklung (26) stromlos, so hält die Wicklung (27) die Arretierung des Lüfters durch den Rasthaken (15) aufrecht. Ihre Kraft ist so bemessen, daß sie diese Haltewirkung ausüben kann. Beim Erreichen einer Kühlmitteltemperatur größer als 110°C öffnet der Schalter (24). Auch die Haltewicklung (27) wird stromlos, und der Lüfter wird freigegeben.If the starter is operated when the switch (23) is opened, i.e. So after starting the engine, the winding (26) de-energized, the winding (27) holds the locking of the Fan upright by the locking hook (15). Your strength is so dimensioned that they can exert this holding effect. When reaching a coolant temperature greater than 110 ° C opens the switch (24). The holding winding (27) is also de-energized, and the fan is released.
Hier gibt der temperaturabhängige Schalter (24) den Schaltkreis (28) frei. Der Schalter (24) ist geschlossen. Wird der Schalter (23) für den Anlasser betätigt, dann sind, wie auch im ersten Fall, beide Wicklungen (27 und 26) strombeaufschlagt. Auch in diesem Fall wird der Rasthaken (15) betätigt und der Lüfter arretiert. Nach dem Laufen des Motors öffnet der Schalter (23), die Haltewicklung (27) hält jedoch die Arretierung des Lüfters aufrecht. Erreicht die Kühlmitteltemperatur 110°C, dann öffnet der Schalter (24), die Haltewicklung (27) wird stromlos und der Lüfter wird freigegeben.Here the temperature-dependent switch (24) gives the circuit (28) free. The switch (24) is closed. Will the Switch (23) actuated for the starter, then, as well in the first case, both windings (27 and 26) are energized. In this case too, the locking hook (15) is actuated and the fan locks. After running the engine opens the switch (23), the holding winding (27) holds the lock the fan upright. Reaches the coolant temperature 110 ° C, then the switch (24) opens the holding winding (27) is de-energized and the fan is released.
In diesem Fall ist der temperaturabhängige Schalter (24) offen. Der Stromkreis (28) ist geöffnet, die Haltewicklung (27) daher stromlos. Wird in diesem Fall der Anlasserschalter (23) betätigt, dann reicht die Anzugskraft der Wicklung (26) alleine nicht aus, um den Rasthaken (15) zu betätigen. Es findet keine Arretierung des Lüfters statt. Wird auch der Anlasserschalter (23) geöffnet, dann wird auch die Anzugswicklung (26) stromlos, so daß der gesamte Elektromagnet (10'), d.h. also das Stellglied mit den Rasthaken (15) unbetätigt bleibt. Eine Arretierung des Lüfters ist daher oberhalb einer Kühlmitteltemperatur von 110° nicht möglich.In this case, the temperature-dependent switch (24) is open. The circuit (28) is open, the holding winding (27) therefore de-energized. In this case, the starter switch (23) actuated, the pulling force of the winding (26) alone is sufficient not out to actuate the locking hook (15). It takes place no locking of the fan instead. Will also be the starter switch (23) opens, then the pull-in winding will also open (26) de-energized so that the entire electromagnet (10 '), i.e. So the actuator with the locking hook (15) remains unactuated. The fan is therefore locked above a coolant temperature of 110 ° is not possible.
Die in Fig. 7 gezeigte Lösung weist daher zusätzlich den Vorteil auf, daß auch dann, wenn der Thermostatschalter (24) defekt sein sollte, eine Arretierung des Lüfters nicht eintreten kann, so daß in einem Störungsfall die Kühlung des Motors stets sichergestellt ist (fail save).The solution shown in FIG. 7 therefore has the additional advantage on that even if the thermostat switch (24) is defective should not lock the fan can, so that in the event of a fault, the cooling of the motor is always ensured (fail save).
Wie ohne weiteres klar wird, ist einer der Hauptvorteile der erfindungsgemäßen Anordnung, daß sich die gesamte Sperreinrichtung in einfacher Weise auch nachträglich anbringen läßt. Dazu wird es nur notwendig, die Halterung (7) ortsfest anzuschrauben und den Elektromagneten (10) in den Schaltkreis des Zündschlosses einzubinden. Bei jedem Start des Motors, bei dem die Kühlmitteltemperatur noch nicht hoch genug ist, wird dann automatisch ein Mitdrehen des Lüfters verhindert, bis die Lüfterleistung zur Kühlung des Motorkühlmittels erforderlich wird. As is readily apparent, one of the main advantages is that arrangement according to the invention that the entire locking device can also be retrofitted in a simple manner. It is only necessary to screw the bracket (7) in place and the electromagnet (10) in the circuit of the Integrate the ignition lock. Every time the engine starts, at which the coolant temperature is not yet high enough then automatically prevents the fan from rotating until the fan power required to cool the engine coolant becomes.
Das beschriebene Ausführungsbeispiel verwendet einen Elektromagneten in Zusammenwirkung mit einem besonders gestalteten Schwenkhaken. Möglich ist es natürlich auch, Elektromagneten oder auch vom elektrischen Zündkreis aus beaufschlagte Stellkolben vorzusehen, die entsprechende Sperrstifte in die Zwischenräume der Kühlrippen des Lüfterrades drücken. Maßgebend ist, daß auch solche Stellglieder mit dem Zündkreislauf gekoppelt und über Halterungen anbringbar sind, die auch den nachträglichen Anbau ermöglichen, ohne konstruktive Änderungen an den Flüssigkeitsreibungskupplungen vorauszusetzen.The described embodiment uses an electromagnet in cooperation with a specially designed Swivel hook. Of course it is also possible to use electromagnets or also actuating pistons acted upon from the electrical ignition circuit provide the appropriate locking pins in the gaps press the cooling fins of the fan wheel. authoritative is that such actuators are coupled to the ignition circuit and attachable to brackets that also enable subsequent attachment without design changes on the fluid friction clutches.
Claims (11)
- A fan for an internal combustion engine with a liquid friction clutch (6) connected between a drive shaft and a fan wheel and with a fixing device for the fan wheel which co-operates positively with the housing (1) of the liquid friction clutch which is fitted with fan blades,
characterised in that
the fixing device is a locking element in the form of a locking hook (15) which engages in the space (21) between cooling fins (4) on the housing (1) of the liquid friction clutch and which is actuated by means of an actuator (10) located in the circuit of the ignition lock (23) and can be actuated by other parameters of the engine control system. - A fan in accordance with Claim 1,
characterised in that
a time delay device (25) is connected upstream of the actuator (10). - A fan in accordance with one of Claims 1 and 2,
characterised in that
the actuator (10) sits in an electric circuit which also contains a temperature-controlled switch (24) to detect the temperature of the coolant. - A fan in accordance with one or more of Claims 1 to 3,
characterised in that
a solenoid (10, 10') is provided as actuator. - A fan in accordance with Claim 4,
characterised in that
the solenoid (10') has two windings to which current can be applied separately, namely a starting winding (26) and a stopping winding (27), located in circuits (22', 28') which are connected in parallel and are designed in such a manner that they are only able to create the starting force required to actuate the locking element (15) together. - A fan in accordance with Claim 5,
characterised in that
the switch (23) for the starter is positioned in the circuit of the starting winding (26) and the temperature-controlled switch (24) is positioned in the circuit of the stopping winding (28). - A fan in accordance with one of Claims 1 to 6,
characterised in that
the locking hook (15) is mounted on a holding device (7) in a fixed position in such a manner that it is able to pivot. - A fan in accordance with Claim 7,
characterised in that
the locking hook (15) is fitted in a fixed position. - A fan in accordance with one of Claims 4 to 8,
characterised in that
the locking hook (15) is provided with a projecting wing (14) made of a magnetically effective material which co-operates with the solenoid (10). - A fan in accordance with one of Claims 1 to 9,
characterised in that
a return spring (18) engages with the locking hook (15). - A fan in accordance with Claim 10,
characterised in that
the return spring is designed as a leaf spring (18) which is fixed to a part of the holding device (7) and encompasses the locking hook (15) laterally.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19617414 | 1996-05-01 | ||
| DE19617414A DE19617414A1 (en) | 1996-05-01 | 1996-05-01 | Fan for an internal combustion engine |
| PCT/EP1997/001950 WO1997041337A1 (en) | 1996-05-01 | 1997-04-18 | Cooling fan for an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0836673A1 EP0836673A1 (en) | 1998-04-22 |
| EP0836673B1 true EP0836673B1 (en) | 2002-11-20 |
Family
ID=7792974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97918147A Expired - Lifetime EP0836673B1 (en) | 1996-05-01 | 1997-04-18 | Cooling fan for an internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0836673B1 (en) |
| JP (1) | JPH11511829A (en) |
| DE (2) | DE19617414A1 (en) |
| WO (1) | WO1997041337A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9188130B2 (en) * | 2013-01-09 | 2015-11-17 | GM Global Technology Operations LLC | Locking device for cooling fan assembly |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE864482C (en) * | 1950-10-22 | 1953-01-26 | Bosch Gmbh Robert | Switching device for electromagnetic clutches in the drive of the fan of internal combustion engines |
| DE1131946B (en) * | 1957-11-28 | 1962-06-20 | Mecanique Et Carrosserie Autom | Fan drive for water-cooled internal combustion engines |
| DE1576731B1 (en) * | 1967-03-18 | 1971-09-16 | Fichtel & Sachs Ag | Thermostat-controlled friction clutch for driving a cooling fan for internal combustion engines |
| JPS58165520A (en) * | 1982-03-26 | 1983-09-30 | Usui Internatl Ind Co Ltd | Fan driving fluid coupling device having on-off function stopping rotation by water temperature detection |
| US4550695A (en) * | 1983-06-08 | 1985-11-05 | Nissan Motor Company, Limited | Fan device for internal combustion engine |
| CS268951B1 (en) * | 1988-01-04 | 1990-04-11 | Vladimir Kliment | Cooling system especially for air cooled engines |
| DE8908359U1 (en) * | 1989-07-08 | 1989-10-26 | Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart | Fluid friction clutch |
| DE19502326A1 (en) * | 1995-01-26 | 1996-08-01 | Bayerische Motoren Werke Ag | Appts. for loading auxiliary output shaft of motor vehicle |
-
1996
- 1996-05-01 DE DE19617414A patent/DE19617414A1/en not_active Withdrawn
-
1997
- 1997-04-18 WO PCT/EP1997/001950 patent/WO1997041337A1/en active IP Right Grant
- 1997-04-18 JP JP9538520A patent/JPH11511829A/en not_active Ceased
- 1997-04-18 DE DE59708766T patent/DE59708766D1/en not_active Expired - Fee Related
- 1997-04-18 EP EP97918147A patent/EP0836673B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11511829A (en) | 1999-10-12 |
| EP0836673A1 (en) | 1998-04-22 |
| DE59708766D1 (en) | 2003-01-02 |
| DE19617414A1 (en) | 1997-11-06 |
| WO1997041337A1 (en) | 1997-11-06 |
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