DE3636484A1 - Electro-hydraulic drive of the fan of a vehicle - Google Patents

Electro-hydraulic drive of the fan of a vehicle

Info

Publication number
DE3636484A1
DE3636484A1 DE19863636484 DE3636484A DE3636484A1 DE 3636484 A1 DE3636484 A1 DE 3636484A1 DE 19863636484 DE19863636484 DE 19863636484 DE 3636484 A DE3636484 A DE 3636484A DE 3636484 A1 DE3636484 A1 DE 3636484A1
Authority
DE
Germany
Prior art keywords
pump
electric motor
driven
fan
vehicle
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.)
Withdrawn
Application number
DE19863636484
Other languages
German (de)
Inventor
Uwe Dipl Ing Altmann
Siegfried Mayer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE19863636484 priority Critical patent/DE3636484A1/en
Publication of DE3636484A1 publication Critical patent/DE3636484A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00Pumping cooling-air or liquid coolants
    • F01P5/10Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12Pump-driving arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00Pumping cooling-air or liquid coolants
    • F01P5/02Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/04Pump-driving arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00Pumping cooling-air or liquid coolants
    • F01P5/14Safety means against, or active at, failure of coolant-pumps drives, e.g. shutting engine down; Means for indicating functioning of coolant pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00Controlling of coolant flow
    • F01P7/02Controlling of coolant flow the coolant being cooling-air
    • F01P7/04Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
    • F01P7/044Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using hydraulic drives
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00Pumping cooling-air or liquid coolants
    • F01P5/10Pumping liquid coolant; Arrangements of coolant pumps
    • F01P2005/105Using two or more pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00Pumping cooling-air or liquid coolants
    • F01P5/10Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12Pump-driving arrangements
    • F01P2005/125Driving auxiliary pumps electrically
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2025/00Measuring
    • F01P2025/08Temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2031/00Fail safe
    • F01P2031/30Cooling after the engine is stopped

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)

Abstract

The electro-hydraulic drive of the fan of a vehicle has a pump (13) which is driven by the internal combustion engine (10) and, in the travel mode, supplies pressure medium to the hydraulic motor (17) for the drive of the impeller wheel (18). When the combustion engine is switched off, a coasting control is activated which has an electric motor (22) which drives a small expeller pump (24) which now supplies the hydraulic motor (17) with pressure medium. The electric motor is switched off when the temperature in the coolant circuit (19) is appropriately reduced. At the same time, the water pump (23) of the cooling device is also driven by the electric motor. The compact device consisting of expeller pump (24), electric motor (22) and water pump (23) can be accommodated at any point in the engine cavity of the motor vehicle. <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung bezieht sich auf einen elektro-hydraulischen Antrieb des Lüfters eines Fahrzeugs nach der Gattung des Hauptanspruchs. Bei derartigen bekannten hydrostatischen Lüfterantrieben, die den Vor­ teil haben, daß das elektrische Bordnetz entlastet wird, weil die Pumpe von der Brennkraftmaschine angetrieben ist, ergibt sich der Nachteil, daß sich im Falle einer sogenannten Nachlaufsteuerung, in welcher der Lüfter noch einige Zeit nach dem Abstellen der Brenn­ kraftmaschine durch einen Elektromotor angetrieben wird, Probleme hinsichtlich der Unterbringung dieses Antriebs ergeben. Es ist oft nicht möglich, bei der Nachlaufsteuerung den im Fahrbetrieb hydro­ statisch angetriebenen Lüfter aus Platzgründen direkt durch einen Elektromotor anzutreiben.The invention relates to an electro-hydraulic drive the fan of a vehicle according to the preamble of the main claim. At such known hydrostatic fan drives that the front have part that the electrical system is relieved because the Pump is driven by the internal combustion engine, the results Disadvantage that in the case of a so-called overrun control, in which the fan still some time after turning off the burner Engine driven by an electric motor, problems regarding the placement of this drive. It is often not possible, with the run-on control the hydro statically driven fan for space reasons directly by a To drive the electric motor.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße elektro-hydraulische Antrieb des Lüfters mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß er sehr kompakt baut und vor allem keine Probleme hinsichtlich seiner Unterbringung im Motorraum des Fahrzeugs verur­ sacht. The electro-hydraulic drive of the fan according to the invention in contrast, has the characteristic features of the main claim the advantage that it is very compact and above all no problems regarding its placement in the engine compartment of the vehicle gently.  

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vor­ teilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Merkmale möglich.The measures listed in the subclaims provide for partial training and improvements in the main claim specified features possible.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung darge­ stellt und in der nachfolgenden Beschreibung näher erläutert. Diese zeigt in vereinfachter, teilweise schematischer Darstellung einen elektro-hydraulischen Antrieb des Lüfters eines Fahrzeugs.An embodiment of the invention is shown in the drawing represents and explained in more detail in the following description. These shows a simplified, partially schematic representation of a electro-hydraulic drive of the fan of a vehicle.

Beschreibung des AusführungsbeispielsDescription of the embodiment

In der Zeichnung ist mit 10 eine Brennkraftmaschine bezeichnet, die über ein Vorgelege 11 oder direkt zwei Pumpen 12 und 13 antreibt, die Druckmittel aus einem Behälter 14 ansaugen. Die Pumpe 12 ver­ sorgt eine nicht dargestellte hydraulische Lenkung, die Pumpe 13 ist als Mehrkreispumpe ausgebildet; an sie sind zwei Leitungen 15, 16 angeschlossen. Die Leitung 16 führt beispielsweise zu einer hydrau­ lischen Niveauregelung und/oder Bremskraftverstärkung, während die Leitung 15 zu einem Hydromotor 17 führt, der das Lüfterrad 18 der Kühleinrichtung antreibt. In der Kühleinrichtung ist der Kühler mit 19 bezeichnet, die Heizung mit 20, eine mechanisch angetriebene Wasserpumpe mit 21, eine von einem Elektromotor 22 angetriebene Wasserpumpe mit 23 und eine ebenfalls vom Elektromotor angetriebene Verdrängerpumpe mit 24, letztere für eine sogenannte Nachlauf­ steuerung, die ebenfalls Druckmittel aus dem Behälter 14 ansaugt. An die Verdrängerpumpe 24 ist eine Leitung 25 angeschlossen, welche in die Leitung 15 mündet. Die Leitungen der Kühleinrichtung sowie die notwendigen Ventile sowie der Thermostat sind nicht weiter bezeich­ net, da nicht erfindungswesentlich.In the drawing, 10 denotes an internal combustion engine which drives via a countershaft 11 or directly two pumps 12 and 13 which draw in pressure medium from a container 14 . The pump 12 provides a hydraulic steering, not shown, the pump 13 is designed as a multi-circuit pump; two lines 15 , 16 are connected to them. The line 16 leads, for example, to a hydraulic level control and / or brake booster, while the line 15 leads to a hydraulic motor 17 which drives the fan wheel 18 of the cooling device. In the cooling device, the cooler is designated by 19 , the heater by 20 , a mechanically driven water pump by 21 , a water pump by 23 driven by an electric motor 22 and a displacement pump also driven by the electric motor by 24 , the latter for a so-called run-on control, which also Sucks pressure medium from the container 14 . A line 25 is connected to the displacement pump 24 , which opens into the line 15 . The lines of the cooling device and the necessary valves and the thermostat are not further referred to, since they are not essential to the invention.

An die Leitung 15 ist in bekannter Weise ein elektrisch steuerbares Druckbegrenzungsventil 26 angeschlossen. Vom Hydromotor 17 führt eine Rücklaufleitung 27 zum Behälter zurück. Am Leitungssystem der Kühl­ einrichtung ist ein Sensor 28 angebracht, von dem eine elektrische Leitung 29 zu einem elektronischen Steuergerät 30 führt, von welchem unter anderem eine elektrische Leitung 31 zum Elektromotor 22 und eine elektrische Leitung 32 zum Druckbegrenzungsventil 26 führen. Über das elektronische Steuergerät 30 werden die einzelnen Kompo­ nenten für die Nachlauf- und Drehzahlsteuerung des Lüfterrades ange­ steuert.An electrically controllable pressure relief valve 26 is connected to line 15 in a known manner. A return line 27 leads from the hydraulic motor 17 back to the container. On the line system of the cooling device, a sensor 28 is attached, from which an electrical line 29 leads to an electronic control unit 30 , from which, inter alia, an electrical line 31 to the electric motor 22 and an electrical line 32 lead to the pressure relief valve 26 . Via the electronic control unit 30 , the individual components for the caster and speed control of the fan wheel are controlled.

Im Fahrbetrieb werden die beiden Pumpen 12, 13 von der Brennkraft­ maschine 10 angetrieben. Hier interessiert nur die Pumpe 13, die Druckmittel über die Leitung 15 zum Hydromotor 17 fördert, der nun das Lüfterrad 18 der Kühleinrichtung antreibt. Auf diese Weise ist kein Strom aus dem Bordnetz notwendig.When driving, the two pumps 12 , 13 are driven by the internal combustion engine 10 . Here, only the pump 13 is interested, which conveys pressure medium via line 15 to the hydraulic motor 17 , which now drives the fan wheel 18 of the cooling device. In this way, no electricity from the vehicle electrical system is necessary.

Wenn die Brennkraftmaschine abgeschaltet wird, tritt die Nachlauf­ steuerung in Aktion, wodurch der Elektromotor 22 eingeschaltet wird, welcher nun die Verdrängerpumpe 24 und die Wasserpumpe 23 antreibt. Bei der Verdrängerpumpe 24 handelt es sich um eine sehr kleine Pumpe, da während des Lüfternachlaufs nur eine verhältnismäßig kleine Leistung notwendig ist. Die Verdrängerpumpe 24 treibt also nun den Hydromotor 17 an, während die Wasserpumpe 23 für den Kühl­ mittelumlauf sorgt. Der für die beiden Pumpen notwendige Batterie­ strom ist gering, so daß diese nicht zu stark belastet ist. Die An­ ordnung von Elektromotor 22, Verdrängerpumpe 24 und Wasserpumpe 23 kann an beliebiger Stelle im Motorraum des Kraftfahrzeugs erfolgen. Dies ist im übrigen notwendig, da zwischen Lüfterrad 18 und Kühler 19 kein Platz für die Anordnung eines Elektromotors vorhanden ist. Ist die Temperatur im Kühlkreislauf entsprechend abgesunken, was durch den Sensor 28 dem elektronischen Steuergerät 30 signalisiert wird, dann wird der Elektromotor 22 ausgeschaltet.When the internal combustion engine is switched off, the overrun control comes into action, whereby the electric motor 22 is switched on, which now drives the displacement pump 24 and the water pump 23 . The displacement pump 24 is a very small pump, since only a relatively small output is required during the fan run-on. The displacement pump 24 now drives the hydraulic motor 17 , while the water pump 23 ensures the cooling medium circulation. The battery current required for the two pumps is low, so that it is not overloaded. The order of the electric motor 22 , displacement pump 24 and water pump 23 can be done anywhere in the engine compartment of the motor vehicle. This is otherwise necessary since there is no space for the arrangement of an electric motor between fan wheel 18 and cooler 19 . If the temperature in the cooling circuit has dropped accordingly, which is signaled to the electronic control unit 30 by the sensor 28 , the electric motor 22 is switched off.

Claims (4)

1. Elektro-hydraulischer Antrieb des Lüfters eines Fahrzeugs mit einer von der Brennkraftmaschine angetriebenen Pumpe (13), die Druckmittel zu einem das Lüfterrad (18) antreibenden Hydromotor (17) fördert und mit einer von einem Elektromotor (22) angetriebenen Nachlaufsteuerung für den Lüfterantrieb, dadurch gekennzeichnet, daß die Nachlaufsteuerung eine ebenfalls vom Elektromotor (22) ange­ triebene Verdrängerpumpe (24) für die Versorgung des Hydromotors (17) aufweist, die nur dann angetrieben ist, wenn die von der Brenn­ kraftmaschine (10) angetriebene Pumpe (13) außer Betrieb ist.1. Electro-hydraulic drive of the fan of a vehicle with a pump ( 13 ) driven by the internal combustion engine, which pumps pressure medium to a hydraulic motor ( 17 ) driving the fan wheel ( 18 ) and with a follow-up control for the fan drive driven by an electric motor ( 22 ) , characterized in that the overrun control also has a displacement pump ( 24 ) driven by the electric motor ( 22 ) for supplying the hydraulic motor ( 17 ), which is only driven when the pump ( 13 ) driven by the internal combustion engine ( 10 ) is out of order. 2. Antrieb nach Anspruch 1, dadurch gekennzeichnet, daß die von der Brennkraftmaschine angetriebene Pumpe (13) eine Mehrkreispumpe ist.2. Drive according to claim 1, characterized in that the pump driven by the internal combustion engine ( 13 ) is a multi-circuit pump. 3. Antrieb nach Anspruch 1 und/oder 2, dadurch gekennzeichnet, daß der Elektromotor über ein elektronisches Steuergerät (30) zu- oder abgeschaltet wird.3. Drive according to claim 1 and / or 2, characterized in that the electric motor is switched on or off via an electronic control unit ( 30 ). 4. Antrieb nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Elektromotor (22) auch eine Wasserpumpe (23) der Kühlein­ richtung antreibt.4. Drive according to one of claims 1 to 3, characterized in that the electric motor ( 22 ) also drives a water pump ( 23 ) of the Kühlein direction.
DE19863636484 1986-10-27 1986-10-27 Electro-hydraulic drive of the fan of a vehicle Withdrawn DE3636484A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19863636484 DE3636484A1 (en) 1986-10-27 1986-10-27 Electro-hydraulic drive of the fan of a vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19863636484 DE3636484A1 (en) 1986-10-27 1986-10-27 Electro-hydraulic drive of the fan of a vehicle

Publications (1)

Publication Number Publication Date
DE3636484A1 true DE3636484A1 (en) 1988-04-28

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ID=6312544

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19863636484 Withdrawn DE3636484A1 (en) 1986-10-27 1986-10-27 Electro-hydraulic drive of the fan of a vehicle

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19538899A1 (en) * 1995-10-19 1997-04-24 Rexroth Mannesmann Gmbh Cooler fan hydrostatic drive e.g. for diesel engine of heavy goods vehicle
EP1726801A1 (en) * 2005-05-21 2006-11-29 Bosch Rexroth Aktiengesellschaft Cooling system and vehicle
CN103758622A (en) * 2014-01-07 2014-04-30 潍柴动力股份有限公司 Control method and control system of engine cooling fan
DE102015013747A1 (en) 2015-10-22 2016-04-14 Daimler Ag Fan drive for engine cooling of a vehicle
DE102016221525B4 (en) 2016-11-03 2019-06-27 Audi Ag Hydraulic system for a motor vehicle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19538899A1 (en) * 1995-10-19 1997-04-24 Rexroth Mannesmann Gmbh Cooler fan hydrostatic drive e.g. for diesel engine of heavy goods vehicle
EP1726801A1 (en) * 2005-05-21 2006-11-29 Bosch Rexroth Aktiengesellschaft Cooling system and vehicle
CN103758622A (en) * 2014-01-07 2014-04-30 潍柴动力股份有限公司 Control method and control system of engine cooling fan
CN103758622B (en) * 2014-01-07 2016-08-17 潍柴动力股份有限公司 The control method of a kind of cooling fan of engine and control system
DE102015013747A1 (en) 2015-10-22 2016-04-14 Daimler Ag Fan drive for engine cooling of a vehicle
DE102016221525B4 (en) 2016-11-03 2019-06-27 Audi Ag Hydraulic system for a motor vehicle

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