EP0884210A2 - Arrangement for driving auxiliary systems of a combustion engine - Google Patents

Arrangement for driving auxiliary systems of a combustion engine Download PDF

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Publication number
EP0884210A2
EP0884210A2 EP98109513A EP98109513A EP0884210A2 EP 0884210 A2 EP0884210 A2 EP 0884210A2 EP 98109513 A EP98109513 A EP 98109513A EP 98109513 A EP98109513 A EP 98109513A EP 0884210 A2 EP0884210 A2 EP 0884210A2
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EP
European Patent Office
Prior art keywords
pulley
crankshaft
belt
water pump
fan
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
EP98109513A
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German (de)
French (fr)
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EP0884210A3 (en
EP0884210B1 (en
Inventor
Wolfgang Wicke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
Daimler Benz AG
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Publication of EP0884210A2 publication Critical patent/EP0884210A2/en
Publication of EP0884210A3 publication Critical patent/EP0884210A3/en
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Publication of EP0884210B1 publication Critical patent/EP0884210B1/en
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members

Definitions

  • the invention relates to a device for driving units an internal combustion engine, such as a water pump and fan, via a belt drive that can be driven from the crankshaft.
  • an internal combustion engine such as a water pump and fan
  • auxiliary units such as. a water pump, an alternator, an air conditioning compressor or other ancillary units are mostly used driven by a belt drive together with a belt.
  • the present invention is therefore based on the object to improve a device of the type mentioned at the outset in such a way that the fan is driven independently of the basic association can and that forces and loads of the fan do not affect the basic association.
  • the drive of the fan is now from the basic association Cut. This means that for one thing there are no repercussions done on the basic unit and secondly that any Desired speed ratios for the fan possible are, although it is also driven by the crankshaft becomes.
  • the relative rotatability can e.g. by a Rolling bearing device, e.g. a ball bearing, done in between is switched. Basically, this is the drive shaft for the fan itself in a proven manner coaxial to the crankshaft, however, uncoupled from it accordingly.
  • Another advantage of the invention is that this results in cost and weight reductions. Translations for the fan are both ins Slow "as well as ins Fast "possible.
  • a first pulley 2 On a crankshaft 1, which is only in principle in FIG. 1 is shown, a first pulley 2 is arranged, the due to the connection with the crankshaft 1 at engine speed circulates.
  • a V-belt 3 connects one on a water pump shaft 4 a water pump 5 arranged second V-belt pulley 6 with the first pulley 2.
  • the one over the second Belt pulley 6 guided V-belt 3 drives in a known manner further auxiliary units, such as an air conditioning compressor 7 and one Alternator 8, each with associated pulleys.
  • a tension pulley 9 between the first V-belt pulley 2 and the air conditioning compressor 7 provides the required voltage of the V-belt 3.
  • V-belt 3 closes again the V-belt pulley 6 of the water pump 5 back.
  • the pulleys 2 and 6, the water pump 5, air conditioning compressor 7 (if present) and alternator 8, together with these V-belts 3 connecting units to each other form a basic structure or first belt drive.
  • the third pulley 10 is via a second V-belt 11 with a fourth V-belt pulley 12 in drive connection and forms a second Belt drive.
  • the fourth V-belt pulley 12 is with a connecting flange 13 provided, which is arranged on an intermediate shaft 14 is.
  • a roller bearing and ball bearing connection 15 is the Intermediate shaft 14 mounted inside a driver 16.
  • the Driver 16 is with the first V-belt pulley 2 connected via screw connections.
  • This type of mounting makes the fourth V-belt pulley 12 arranged coaxially to the crankshaft 1, but from this uncoupled so that they are independent of the speed of the crankshaft 1 is.
  • the speed of the fourth pulley 12 and thus connected connecting flange 13 depends on the Translations via V-belt pulleys 2, 6, 10 and 12 or their diameters to each other. This way, any one can given translation i can be set.
  • the flange 13 is with a coupling, e.g. a viscous coupling, 17 connected, the coaxial to the intermediate shaft 14 and so that it is also coaxial to the crankshaft 1.
  • a coupling e.g. a viscous coupling
  • 17 On the clutch 17 a fan 18 is arranged. Structure and mode of operation the clutch 17 and its connection to the fan 18 generally known, which is why it is not discussed in more detail here becomes.
  • the drive of the fan 18 via that on the water pump shaft 4 arranged pulley 10 and the co-axial to the crankshaft 1st fourth pulley 12 supported on the intermediate shaft 14 is independent of the basic association. This applies to both Effects of forces as well as the possibility of other gear ratios to create for the fan drive.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Supercharger (AREA)

Abstract

The end of the crankshaft is fitted with a first pulley (2) which drives a main belt (3) to transmit torque to the water pump pulley (6) and to the other accessories. The water pump pulley is connected to a coaxial secondary pulley (10) which drives the second belt which is looped over the blower pulley (11). For a compact mounting the bearing for the blower fan is mounted on an extension support on the end of the crankshaft. The blower drive is thus uncoupled from the accessories drive and the blower can be driven at a different speed to the accessories by choice of the pulley sizes. The accessories are relieved of the strain on the pulley drive.

Description

Die Erfindung betrifft eine Vorrichtung zum Antreiben von Aggregaten einer Brennkraftmaschine, wie Wasserpumpe und Lüfter, über einen von der Kurbelwelle aus antreibbaren Riemenantrieb.The invention relates to a device for driving units an internal combustion engine, such as a water pump and fan, via a belt drive that can be driven from the crankshaft.

Es ist allgemein bekannt einen Lüfter direkt mit der Kurbelwelle oder einer Verlängerung der Kurbelwelle zu verbinden und auf diese Weise den Lüfter direkt anzutreiben. Weitere Nebenaggregate, wie z.B. eine Wasserpumpe, eine Lichtmaschine, ein Klimakompressor oder andere Nebenaggregate, werden dabei zumeist durch einen Riemenantrieb mit einem Riemen gemeinsam angetrieben.It is well known to directly connect a fan to the crankshaft or an extension of the crankshaft to connect and on this way to drive the fan directly. Other auxiliary units, such as. a water pump, an alternator, an air conditioning compressor or other ancillary units are mostly used driven by a belt drive together with a belt.

Aus der DE 195 11 702 A1 und der DE 24 23 746 C2 ist es bereits bekannt den Lüfter über die Wasserpumpenwelle anzutreiben, wobei in üblicher Weise die Wasserpumpe über einen Riemenantrieb mit der Kurbelwelle in Verbindung steht. Der Lüfter ist koaxial zur Wasserpumpenwelle angeordnet und über eine Kupplung mit dieser verbindbar.It is already from DE 195 11 702 A1 and DE 24 23 746 C2 known to drive the fan via the water pump shaft, whereby in the usual way the water pump via a belt drive communicates with the crankshaft. The fan is coaxial arranged to the water pump shaft and with a coupling this connectable.

Nachteilig dabei ist jedoch, daß die Kräfte bzw. die Belastung des Lüfters auf den Grundverband, der aus dem Riementrieb mit den davon angetriebenen Aggregaten besteht, wirken. Darüber hinaus liegen bei dieser Ausgestaltung die Drehzahlverhältnisse fest.The disadvantage, however, is that the forces or the load of the fan on the basic dressing that comes from the belt drive the aggregates driven by it, act. About that In addition, the speed ratios are in this embodiment firmly.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung der eingangs erwähnten Art derart zu verbessern, daß der Lüfter unabhängig von dem Grundverband angetrieben werden kann und daß Kräfte und Belastungen des Lüfters nicht auf den Grundverband zurückwirken.The present invention is therefore based on the object to improve a device of the type mentioned at the outset in such a way that the fan is driven independently of the basic association can and that forces and loads of the fan do not affect the basic association.

Erfindungsgemäß wird diese Aufgabe durch die in Anspruch 1 genannten Merkmale gelöst.According to the invention, this object is achieved by those mentioned in claim 1 Features resolved.

Erfindungsgemäß ist nunmehr der Antrieb des Lüfters vom Grundverband getrennt. Dies bedeutet, daß zum einen keine Rückwirkungen auf den Grundverband erfolgen und zum anderen, daß beliebig gewünschte Drehzahlübersetzungen für den Lüfter möglich sind, obwohl er ebenfalls von der Kurbelwelle aus angetrieben wird. Dies ist im wesentlichen dadurch möglich geworden, daß die Wasserpumpe bzw. die Wasserpumpenwelle nur als Antriebswelle im Sinne eines Vorgeleges wirkt und daß der Lüfter von der Kurbelwelle zwar angetrieben aber trotzdem zu ihr eine Drehbarkeit besitzt. Die relative Drehbarkeit kann z.B. durch eine Wälzlagereinrichtung, z.B. ein Kugellager, erfolgen, das dazwischen geschaltet ist. Grundsätzlich liegt damit die Antriebswelle für den Lüfter selbst in bewährter Weise koaxial zur Kurbelwelle, allerdings entsprechend von dieser abgekoppelt.According to the invention, the drive of the fan is now from the basic association Cut. This means that for one thing there are no repercussions done on the basic unit and secondly that any Desired speed ratios for the fan possible are, although it is also driven by the crankshaft becomes. This is essentially possible because the water pump or the water pump shaft only as a drive shaft acts in the sense of a countershaft and that the fan of the The crankshaft is driven but still rotatable owns. The relative rotatability can e.g. by a Rolling bearing device, e.g. a ball bearing, done in between is switched. Basically, this is the drive shaft for the fan itself in a proven manner coaxial to the crankshaft, however, uncoupled from it accordingly.

Ein weiterer Vorteil der Erfindung besteht darin, daß sich auf diese Weise Kosten- und Gewichtsreduzierungen ergeben. Übersetzungen für den Lüfter sind sowohl ins

Figure 00020001
Langsame" als auch ins Schnelle" möglich.Another advantage of the invention is that this results in cost and weight reductions. Translations for the fan are both ins
Figure 00020001
Slow "as well as ins Fast "possible.

Aufkommende Riemenkräfte vom Lüfter werden von der Wasserpumpe aufgenommen, was in diesem Fall bewirkt, daß für die nachgeschalteten Aggregate im Grundbetrieb keine Lagerverstärkung erforderlich wird.Belt forces from the fan are generated by the water pump added, which in this case causes for the downstream Units in basic operation no stock reinforcement is required.

Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und aus dem nachfolgend anhand der Zeichnungen prinzipmäßig dargestellten Ausführungsbeispiel.Advantageous refinements and developments of the invention result from the subclaims and from the following based on the drawings embodiment shown in principle.

Es zeigt:

Fig. 1
eine Seitenansicht der erfindungsgemäßen Vorrichtung;
Fig. 2
eine Ansicht der erfindungsgemäßen Vorrichtung von vorne; und
Fig. 3
einen vergrößerten Schnitt bezüglich der Lagerung der vierten Riemenscheibe.
It shows:
Fig. 1
a side view of the device according to the invention;
Fig. 2
a view of the device according to the invention from the front; and
Fig. 3
an enlarged section regarding the bearing of the fourth pulley.

Auf einer Kurbelwelle 1, die in der Fig. 1 nur prinzipmäßig dargestellt ist, ist eine erste Riemenscheibe 2 angeordnet, die aufgrund der Verbindung mit der Kurbelwelle 1 mit Motordrehzahl umlauft. Ein Keilriemen 3 verbindet eine auf einer Wasserpumpenwelle 4 einer Wasserpumpe 5 angeordnete zweite Keilriemenscheibe 6 mit der ersten Riemenscheibe 2. Der über die zweite Riemenscheibe 6 geführte Keilriemen 3 treibt in bekannter Weise weitere Nebenaggregate, wie einen Klimakompressor 7 und eine Lichtmaschine 8, mit jeweils dazugehörigen Riemenscheiben an. On a crankshaft 1, which is only in principle in FIG. 1 is shown, a first pulley 2 is arranged, the due to the connection with the crankshaft 1 at engine speed circulates. A V-belt 3 connects one on a water pump shaft 4 a water pump 5 arranged second V-belt pulley 6 with the first pulley 2. The one over the second Belt pulley 6 guided V-belt 3 drives in a known manner further auxiliary units, such as an air conditioning compressor 7 and one Alternator 8, each with associated pulleys.

Eine Spannrolle 9 zwischen der ersten Keilriemenscheibe 2 und dem Klimakompressor 7 sorgt für eine erforderliche Spannung des Keilriemens 3.A tension pulley 9 between the first V-belt pulley 2 and the air conditioning compressor 7 provides the required voltage of the V-belt 3.

Von der Lichtmaschine 8 aus läuft der Keilriemen 3 wieder zu der Keilriemenscheibe 6 der Wasserpumpe 5 zurück. Die Riemenscheiben 2 und 6, die Wasserpumpe 5, Klimakompressor 7 (sofern vorhanden) und Lichtmaschine 8, bilden zusammen mit den diese Aggregate miteinander verbindenden Keilriemen 3 einen Grundverband bzw. ersten Riementrieb.From the alternator 8, the V-belt 3 closes again the V-belt pulley 6 of the water pump 5 back. The pulleys 2 and 6, the water pump 5, air conditioning compressor 7 (if present) and alternator 8, together with these V-belts 3 connecting units to each other form a basic structure or first belt drive.

Auf der Wasserpumpenwelle 4 befindet sich als Doppelriemenscheibe eine dritte Riemenscheibe 10. Die dritte Riemenscheibe 10 ist über einen zweiten Keilriemen 11 mit einer vierten Keilriemenscheibe 12 in Antriebsverbindung und bildet einen zweiten Riementrieb.There is a double pulley on the water pump shaft 4 a third pulley 10. The third pulley 10 is via a second V-belt 11 with a fourth V-belt pulley 12 in drive connection and forms a second Belt drive.

Die vierte Keilriemenscheibe 12 ist mit einem Verbindungsflansch 13 versehen, der auf einer Zwischenwelle 14 angeordnet ist. Über eine Wälzlager- und Kugellagerverbindung 15 ist die Zwischenwelle 14 im Inneren eines Mitnehmers 16 gelagert. Der Mitnehmer 16 wiederum ist mit der ersten Keilriemenscheibe 2 über Schraubverbindungen verbunden.The fourth V-belt pulley 12 is with a connecting flange 13 provided, which is arranged on an intermediate shaft 14 is. About a roller bearing and ball bearing connection 15 is the Intermediate shaft 14 mounted inside a driver 16. Of the Driver 16 in turn is with the first V-belt pulley 2 connected via screw connections.

Durch diese Lagerungsart ist die vierte Keilriemenscheibe 12 zwar koaxial zur Kurbelwelle 1 angeordnet, jedoch von dieser abgekoppelt, so daß sie von der Kurbelwelle 1 drehzahlunabhängig ist. Die Drehzahl der vierten Riemenscheibe 12 und des damit verbundenen Verbindungsflansches 13 richtet sich nach den Übersetzungen über die Keilriemenscheiben 2, 6, 10 und 12 bzw. deren Durchmesser zueinander. Auf diese Weise kann eine beliebig vorgegebene Übersetzung i eingestellt werden.This type of mounting makes the fourth V-belt pulley 12 arranged coaxially to the crankshaft 1, but from this uncoupled so that they are independent of the speed of the crankshaft 1 is. The speed of the fourth pulley 12 and thus connected connecting flange 13 depends on the Translations via V-belt pulleys 2, 6, 10 and 12 or their diameters to each other. This way, any one can given translation i can be set.

Der Flansch 13 ist mit einer Kupplung, z.B. einer Visco-Kupplung, 17 verbunden, die koaxial zur Zwischenwelle 14 und damit ebenfalls koaxial zur Kurbelwelle 1 liegt. Auf der Kupplung 17 ist ein Lüfter 18 angeordnet. Aufbau und Wirkungsweise der Kupplung 17 und dessen Verbindung mit dem Lüfter 18 sind allgemein bekannt, weshalb hier nicht naher darauf eingegangen wird.The flange 13 is with a coupling, e.g. a viscous coupling, 17 connected, the coaxial to the intermediate shaft 14 and so that it is also coaxial to the crankshaft 1. On the clutch 17 a fan 18 is arranged. Structure and mode of operation the clutch 17 and its connection to the fan 18 generally known, which is why it is not discussed in more detail here becomes.

Der Antrieb des Lüfters 18 über die auf der Wasserpumpenwelle 4 angeordnete Riemenscheibe 10 und der ko-axial zur Kurbelwelle 1 auf der Zwischenwelle 14 gelagerten vierten Riemenscheibe 12 ist unabhängig vom Grundverband. Dies gilt sowohl bezüglich Kräfterückwirkungen als auch der Möglichkeit andere Übersetzungsverhältnisse für den Lüfterantrieb zu schaffen.The drive of the fan 18 via that on the water pump shaft 4 arranged pulley 10 and the co-axial to the crankshaft 1st fourth pulley 12 supported on the intermediate shaft 14 is independent of the basic association. This applies to both Effects of forces as well as the possibility of other gear ratios to create for the fan drive.

Claims (4)

Vorrichtung zum Antreiben von Aggregaten einer Brennkraftmaschine, wie Wasserpumpe und Lüfter, über einen von einer Kurbelwelle aus antreibbaren ersten Riementrieb durch eine mit der Kurbelwelle verbundene erste Riemenscheibe, wobei 1.1 die erste Riemenscheibe (2) mit einer mit einer Wasserpumpenwelle (4) verbundenen zweiten Riemenscheibe (6) über einen Riemen (3) in einer Antriebsverbindung steht, 1.2 mit der Wasserpumpenwelle (4) eine dritte Riemenscheibe (10) verbunden ist, 1.3 die dritte Riemenscheibe (10) mit einer vierten Riemenscheibe (12), die auf der Kurbelwelle (1) oder einer Verlängerung (16) der Kurbelwelle drehbar gegenüber der Kurbelwelle (1) gelagert ist, einen zweiten Riemenantrieb bildet und 1.4 der Lüfter (18) mit der vierten Riemenscheibe (12) in Antriebsverbindung steht. Device for driving units of an internal combustion engine, such as a water pump and fan, via a first belt drive that can be driven from a crankshaft by a first pulley connected to the crankshaft, wherein 1.1 the first pulley (2) is connected to a second pulley (6) connected to a water pump shaft (4) via a belt (3), 1.2 a third pulley (10) is connected to the water pump shaft (4), 1.3 the third pulley (10) with a fourth pulley (12) which is rotatably mounted on the crankshaft (1) or an extension (16) of the crankshaft relative to the crankshaft (1), forms a second belt drive and 1.4 the fan (18) is in drive connection with the fourth pulley (12). Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß
durch den ersten Riementrieb mit dem Riemen (3) weitere Nebenaggregate (7,8) angetrieben sind. Device according to claim 1,
characterized in that
further auxiliary units (7, 8) are driven by the first belt drive with the belt (3). Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß
die vierte Riemenscheibe (12) über eine Flanschverbindung (13) mit einer Kupplung (17) verbunden ist, die mit dem Lüfter (18) verbindbar ist.Device according to claim 1 or 2,
characterized in that
the fourth pulley (12) is connected via a flange connection (13) to a coupling (17) which can be connected to the fan (18). Vorrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß
die vierte Riemenscheibe (12) über eine Walz- und Kugellagereinrichtung (15) auf der Kurbelwelle (1) oder der mit der Kurbelwelle verbundenen Verlangerung (16) gelagert ist.Device according to one of claims 1 to 3,
characterized in that
the fourth pulley (12) is mounted on the crankshaft (1) or the extension (16) connected to the crankshaft via a roller and ball bearing device (15).
EP98109513A 1997-06-15 1998-05-26 Arrangement for driving a water pump and a fan of a combustion engine Expired - Lifetime EP0884210B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19725216A DE19725216C1 (en) 1997-06-15 1997-06-15 Device for driving units of an internal combustion engine
DE19725216 1997-06-15

Publications (3)

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EP0884210A2 true EP0884210A2 (en) 1998-12-16
EP0884210A3 EP0884210A3 (en) 1999-11-17
EP0884210B1 EP0884210B1 (en) 2001-10-31

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EP (1) EP0884210B1 (en)
DE (2) DE19725216C1 (en)

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EP3115242A1 (en) 2015-07-04 2017-01-11 MAN Truck & Bus AG Ventilator drive for a motor vehicle

Also Published As

Publication number Publication date
EP0884210A3 (en) 1999-11-17
US6079385A (en) 2000-06-27
EP0884210B1 (en) 2001-10-31
DE19725216C1 (en) 1998-11-19
DE59801921D1 (en) 2001-12-06

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