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EP0441167A1 - Camshafts control drive for a V type engine - Google Patents

Camshafts control drive for a V type engine Download PDF

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Publication number
EP0441167A1
EP0441167A1 EP91100763A EP91100763A EP0441167A1 EP 0441167 A1 EP0441167 A1 EP 0441167A1 EP 91100763 A EP91100763 A EP 91100763A EP 91100763 A EP91100763 A EP 91100763A EP 0441167 A1 EP0441167 A1 EP 0441167A1
Authority
EP
European Patent Office
Prior art keywords
camshaft
intake
driven
toothed belt
camshafts
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.)
Ceased
Application number
EP91100763A
Other languages
German (de)
French (fr)
Inventor
Albert Dipl.-Ing. Schweikard (Fh)
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.)
Adam Opel GmbH
Original Assignee
Adam Opel 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 Adam Opel GmbH filed Critical Adam Opel GmbH
Publication of EP0441167A1 publication Critical patent/EP0441167A1/en
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/024—Belt drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/06—Endless member is a belt
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement

Definitions

  • the invention relates to an internal combustion engine with two V-shaped rows of cylinders, above the cylinder heads of which an exhaust camshaft is arranged to actuate the exhaust valves and an intake camshaft to actuate the intake valves, the two exhaust camshafts and intake camshafts being driven by means of a toothed belt driven by the crankshaft and the angular position of the intake camshafts relative to the exhaust camshafts can be changed by means of an adjusting device.
  • the internal combustion engine described in the magazine mentioned has its own adjustment device for each intake camshaft. A total of two adjustment devices are therefore required in order to be able to adjust both intake camshafts. The costs for adjusting the camshafts are thus twice as high for a V engine as for an inline engine. Another disadvantage is that if one of the adjusting devices fails, the motor runs out of round and that tolerances in the adjusting devices differ too much Control timing for the left and right engine side.
  • both drives have their own adjusting device, the adjusting device of the primary drive synchronously changing the angular position of both camshafts relative to the crankshaft and the second adjusting device serving to adjust the angular position of both crankshafts to one another.
  • the invention has for its object to design an internal combustion engine of the type mentioned in such a way that an optimal adjustment of the camshafts is possible with the least possible effort.
  • This object is achieved in that at least one intake camshaft and one exhaust camshaft are driven directly by the toothed belt of the crankshaft and at least one camshaft of the other row of cylinders is connected by gear to the corresponding camshaft of the first row of cylinders by means of a secondary drive, and that only those directly from the toothed belt of the crankshaft driven camshaft with the secondary drive has an adjustment device.
  • the same number of adjustment devices as a series engine are sufficient for a V-engine. If the adjustment device fails, the internal combustion engine is still operational because the camshafts connected to one another by the secondary drive inevitably rotate synchronously. Furthermore, the synchronism of the camshafts to be adjusted is improved, since instead of two or four adjusting members, only one adjusting member or two adjusting members are present and the number of error sources is thus halved. The reduction in the number of adjusting elements also leads to a reduction in the weight of the rotating masses, which increases the turning ability of the internal combustion engine.
  • the internal combustion engine can manage with only one adjusting device if, according to an advantageous embodiment of the invention, the toothed belt is guided via one camshaft sprocket of each exhaust camshaft and one camshaft sprocket of an intake camshaft, if the second intake camshaft is connected by gearing to the first intake camshaft driven by the toothed belt and if only the camshaft sprocket of the intake camshaft driven by the toothed belt has the adjusting device.
  • the exhaust camshafts could of course also be designed to be adjustable according to the same principle.
  • the drawing shows an engine block 1 with two V-shaped rows of cylinders 2, 3.
  • Each cylinder row 2, 3 are each above the cylinder heads 4, 5, an exhaust camshaft 6, 7 for controlling the exhaust valves, not shown, and an intake camshaft 8, 9 for controlling the Also assigned intake valves not shown.
  • a camshaft gear 10, 11, 12 is arranged on the exhaust camshafts 6, 7 and the intake camshaft 8, respectively.
  • the three camshaft gears 10, 11, 12 have the same diameter and form a primary drive with the toothed pulley 14 and the toothed belt 13.
  • a second, smaller-diameter camshaft gear 16 is provided on the intake camshaft 8.
  • the same camshaft gear 17 is located on the intake camshaft 9.
  • a secondary toothed belt 18 is guided over these camshaft gears 16, 17 and forms a secondary drive 19 with them.
  • This secondary drive 19 can be arranged on the same engine face as the camshaft gears 10, 11, 12. It However, it is also possible to arrange it at any point between two bearings of the cylinder head 4, 5, for example between the first and second bearings or on the flywheel side.
  • an adjusting device 20 of conventional design is integrated, of which only one control lever 21 can be seen in the drawing.
  • this adjusting device 20 By means of this adjusting device 20, a phase shift between the camshaft sprockets 11 and 16 can be achieved. Since the camshaft gear 17 runs through the secondary toothed belt 18 in synchronism with the camshaft gear 11, it has the same phase shift with respect to the camshaft gear 12 of the exhaust camshaft 7.
  • camshaft drives can of course also be done with chains instead of toothed belts.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

An internal combustion engine has an engine block (1) with two cylinder banks (2,3) arranged in a V-shape and overhead camshafts (6,7,8,9). The exhaust camshafts (6,7) and an intake camshaft (8) are driven directly by a toothed belt (13) by means of the crankshaft (15). Provided on the intake camshaft (8) is an adjusting device (20) which can adjust the phase position of a camshaft wheel (11) revolving with it. This camshaft wheel (11) is part of a secondary drive (19) driving the second intake camshaft (9). <IMAGE>

Description

Die Erfindung betrifft eine Brennkraftmaschine mit zwei v-förmig angeordneten Zylinderreihen, oberhalb deren Zylinderköpfe jeweils zur Betätigung der Auslaßventile eine Auslaßnockenwelle und zur Betätigung der Einlaßventile eine Einlaßnockenwelle angeordnet ist, wobei der Antrieb der beiden Auslaßnockenwellen und Einlaßnockenwellen mittels eines von der Kurbelwelle angetriebenen Zahnriemens erfolgt und die Winkelstellung der Einlaßnockenwellen relativ zu den Auslaßnockenwellen mittels einer Verstelleinrichtung veränderbar ist.The invention relates to an internal combustion engine with two V-shaped rows of cylinders, above the cylinder heads of which an exhaust camshaft is arranged to actuate the exhaust valves and an intake camshaft to actuate the intake valves, the two exhaust camshafts and intake camshafts being driven by means of a toothed belt driven by the crankshaft and the angular position of the intake camshafts relative to the exhaust camshafts can be changed by means of an adjusting device.

Brennkraftmaschinen mit einer solchen Verstellmöglichkeit der Einlaßnockenwellen sind in jüngster Zeit bekannt geworden. Beispielsweise beschreibt die MTZ Motortechnische Zeitschrift 50 (1989) 5, Seiten 223 - 229, eine solche Brennkraftmaschine. Durch den Einsatz einer Nockenwellenverstellung kann man die Nockenwellen-Steuerzeiten für hohe Motorleistungen optimieren, ohne daß im unteren Drehzahlbereich spürbare Drehmomenteinbußen auftreten. Weiterhin läßt sich durch geringe überschneidungsquerschnitte eine gute Leerlaufqualität und eine Reduzierung schädlicher Abgasemissionen erreichen.Internal combustion engines with such an adjustment option of the intake camshafts have recently become known. For example, MTZ Motortechnische Zeitschrift 50 (1989) 5, pages 223-229 describes such an internal combustion engine. By using a camshaft adjustment, the camshaft timing can be optimized for high engine performance without noticeable torque losses in the lower speed range. Furthermore, good idling quality and a reduction in harmful exhaust gas emissions can be achieved by means of small overlap cross sections.

Die in der genannten Zeitschrift beschriebene Brennkraftmaschine hat für jede Einlaßnockenwelle eine eigene Verstelleinrichtung. Es werden deshalb insgesamt zwei Verstelleinrichtungen benötigt, um beide Einlaßnockenwellen verstellen zu können. Die Kosten für die Verstelleinrichtung der Nockenwellen sind somit bei einem V-Motor doppelt so hoch wie bei einem Reihenmotor. Ein weiterer Nachteil liegt darin, daß bei Ausfall einer Verstelleinrichtung sich ein unrunder Motorlauf ergibt und daß Toleranzen in den Verstelleinrichtungen zu unterschiedlichen Steuerzeiten für die linke und rechte Motorseite führen.The internal combustion engine described in the magazine mentioned has its own adjustment device for each intake camshaft. A total of two adjustment devices are therefore required in order to be able to adjust both intake camshafts. The costs for adjusting the camshafts are thus twice as high for a V engine as for an inline engine. Another disadvantage is that if one of the adjusting devices fails, the motor runs out of round and that tolerances in the adjusting devices differ too much Control timing for the left and right engine side.

Wie die DE-OS-35 34 446 zeigt, ist es bei einem Reihenmotor bereits bekannt, nur eine Nockenwelle unmittelbar vom Zahnriemen der Kurbelwelle anzutreiben und die zweite Nockenwelle mittels eines Sekundärantriebs mit der ersten Nockenwelle zu verbinden. Bei der Brennkraftmaschine nach dieser Schrift weisen beide Antriebe eine eigene Verstelleinrichtung auf, wobei die Verstelleinrichtung des Primärantriebs die Winkelstellung beider Nockenwellen relativ zur Kurbelwelle synchron verändert und die zweite Verstelleinrichtung zum Verstellen der Winkellage beider Kurbelwellen zueinander dient. Würde man das Bauprinzip der Brennkraftmaschine gemäß dieser Schrift auf einen V-Motor übertragen, so müßten insgesamt vier Verstelleinrichtungen vorgesehen werden, wodurch die Herstellungskosten der Brennkraftmaschine unerwünscht hoch würden und Toleranzen zu einer schlechten Motorfunktion führten.As DE-OS-35 34 446 shows, it is already known in a series engine to drive only one camshaft directly from the toothed belt of the crankshaft and to connect the second camshaft to the first camshaft by means of a secondary drive. In the internal combustion engine according to this document, both drives have their own adjusting device, the adjusting device of the primary drive synchronously changing the angular position of both camshafts relative to the crankshaft and the second adjusting device serving to adjust the angular position of both crankshafts to one another. If one were to transfer the construction principle of the internal combustion engine according to this document to a V-type engine, a total of four adjustment devices would have to be provided, as a result of which the manufacturing costs of the internal combustion engine would become undesirably high and tolerances would lead to poor engine function.

Der Erfindung liegt die Aufgabe zugrunde, eine Brennkraftmaschine der eingangs genannten Art so auszubilden, daß mit möglichst geringem Aufwand eine optimale Verstellung der Nockenwellen möglich wird.The invention has for its object to design an internal combustion engine of the type mentioned in such a way that an optimal adjustment of the camshafts is possible with the least possible effort.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß zumindest eine Einlaßnockenwelle und eine Auslaßnockenwelle unmittelbar vom Zahnriemen der Kurbelwelle angetrieben ist und zumindest eine Nockenwelle der anderen Zylinderreihe mittels eines Sekundärantriebs getrieblich mit der entsprechenden Nockenwelle der ersten Zylinderreihe verbunden ist und daß nur die unmittelbar vom Zahnriemen der Kurbelwelle angetriebene Nockenwelle mit dem Sekundärantrieb eine Verstelleinrichtung hat.This object is achieved in that at least one intake camshaft and one exhaust camshaft are driven directly by the toothed belt of the crankshaft and at least one camshaft of the other row of cylinders is connected by gear to the corresponding camshaft of the first row of cylinders by means of a secondary drive, and that only those directly from the toothed belt of the crankshaft driven camshaft with the secondary drive has an adjustment device.

Durch diese erfindungsgemäße Gestaltung kommt man bei einem V-Motor mit der gleichen Anzahl von Verstelleinrichtungen aus wie bei einem Reihenmotor. Bei Ausfall der Verstelleinrichtung ist die Brennkraftmaschine noch betriebsfähig, weil die durch den Sekundärantrieb miteinander verbundenen Nockenwellen zwangsläufig synchron drehen. Weiterhin wird der Gleichlauf der zu verstellenden Nockenwellen verbessert, da statt zwei oder vier Verstellglieder nur noch ein Verstellglied oder zwei Verstellglieder vorhanden sind und somit die Zahl der Fehlerquellen halbiert wird. Die Verringerung der Anzahl der Verstellglieder führt auch zu einer Verminderung des Gewichtes der rotierenden Massen, was die Drehfreudigkeit der Brennkraftmaschine erhöht.With this design according to the invention, the same number of adjustment devices as a series engine are sufficient for a V-engine. If the adjustment device fails, the internal combustion engine is still operational because the camshafts connected to one another by the secondary drive inevitably rotate synchronously. Furthermore, the synchronism of the camshafts to be adjusted is improved, since instead of two or four adjusting members, only one adjusting member or two adjusting members are present and the number of error sources is thus halved. The reduction in the number of adjusting elements also leads to a reduction in the weight of the rotating masses, which increases the turning ability of the internal combustion engine.

Die Brennkraftmaschine vermag mit nur einer Verstelleinrichtung insgesamt auszukommen, wenn gemäß einer vorteilhaften Ausgestaltung der Erfindung der Zahnriemen über jeweils ein Nockenwellenrad jeder Auslaßnockenwelle und ein Nockenwellenrad einer Einlaßnockenwelle geführt ist, wenn die zweite Einlaßnockenwelle durch den Sekundärantrieb getrieblich mit der ersten, vom Zahnriemen angetriebenen Einlaßnockenwelle verbunden ist und wenn nur das Nockenwellenrad der vom Zahnriemen angetriebenen Einlaßnockenwelle die Verstelleinrichtung aufweist. Nach dem gleichen Prinzip könnte man natürlich auch die Auslaßnockenwellen verstellbar ausbilden.The internal combustion engine can manage with only one adjusting device if, according to an advantageous embodiment of the invention, the toothed belt is guided via one camshaft sprocket of each exhaust camshaft and one camshaft sprocket of an intake camshaft, if the second intake camshaft is connected by gearing to the first intake camshaft driven by the toothed belt and if only the camshaft sprocket of the intake camshaft driven by the toothed belt has the adjusting device. The exhaust camshafts could of course also be designed to be adjustable according to the same principle.

Der Platzbedarf der Brennkraftmaschine wird verringert, wenn der Durchmesser der Nockenwellenräder des Sekundärantriebes geringer ist als der Durchmesser den Nockenwellenräder, welche vom Zahnriemen der Kurbelwelle angetrieben sind. Diese Ausbildung führt zudem zu einer weiteren Gewichtsersparnis.The space requirement of the internal combustion engine is reduced if the diameter of the camshaft wheels of the secondary drive is less than the diameter of the camshaft wheels which are driven by the toothed belt of the crankshaft. This training also leads to further weight savings.

Die Erfindung läßt zahlreiche Ausführungsformen zu. Zur weiteren Verdeutlichung ihres Grundprinzips ist in der Zeichnung schematisch eine erfindungsgemäß gestaltete Brennkraftmaschine dargestellt und wird nachfolgend beschrieben.The invention allows numerous embodiments. To further clarify its basic principle, an internal combustion engine designed according to the invention is shown schematically in the drawing and is described below.

Die Zeichnung zeigt einen Motorblock 1 mit zwei V-förmig angeordneten Zylinderreihen 2, 3. Jeder Zylinderreihe 2, 3 sind jeweils oberhalb der Zylinderköpfe 4, 5 eine Auslaßnockenwelle 6, 7 zur Steuerung der nicht gezeigten Auslaßventile und eine Einlaßnockenwelle 8, 9 zur Steuerung der ebenfalls nicht gezeigten Einlaßventile zugeordnet. Auf den Auslaßnockenwellen 6, 7 und der Einlaßnockenwelle 8 ist jeweils ein Nockenwellenrad 10, 11, 12 angeordnet. über diese drei Nockenwellenräder 10, 11, 12 ist ein Zahnriemen 13 geführt, der von einer Zahnscheibe 14 der Kurbelwelle 15 der Brennkraftmaschine angetrieben wird. Die drei Nockenwellenräder 10, 11, 12 haben gleichen Durchmesser und bilden mit der Zahnscheibe 14 und dem Zahnriemen 13 einen Primärantrieb.The drawing shows an engine block 1 with two V-shaped rows of cylinders 2, 3. Each cylinder row 2, 3 are each above the cylinder heads 4, 5, an exhaust camshaft 6, 7 for controlling the exhaust valves, not shown, and an intake camshaft 8, 9 for controlling the Also assigned intake valves not shown. A camshaft gear 10, 11, 12 is arranged on the exhaust camshafts 6, 7 and the intake camshaft 8, respectively. A toothed belt 13, which is driven by a toothed pulley 14 of the crankshaft 15 of the internal combustion engine, is guided over these three camshaft wheels 10, 11, 12. The three camshaft gears 10, 11, 12 have the same diameter and form a primary drive with the toothed pulley 14 and the toothed belt 13.

Auf der Einlaßnockenwelle 8 ist eine zweites, durchmesserkleineres Nockenwellenrad 16 vorgesehen. Ein gleiches Nockenwellenrad 17 befindet sich auf der Einlaßnockenwelle 9. Ein Sekundärzahnriemen 18 ist über diese Nockenwellenräder 16, 17 geführt und bildet mit ihnen einen Sekundärantrieb 19. Dieser Sekundärantrieb 19 kann auf der gleichen Motorstirnseite angeordnet sein wie die Nockenwellenräder 10, 11, 12. Es ist jedoch auch möglich, ihn an jeder beliebigen Stelle zwischen zwei Lagern des Zylinderkopfes 4, 5, etwa zwischen dem ersten und zweiten Lager oder auf der Schwungradseite anzuordnen.A second, smaller-diameter camshaft gear 16 is provided on the intake camshaft 8. The same camshaft gear 17 is located on the intake camshaft 9. A secondary toothed belt 18 is guided over these camshaft gears 16, 17 and forms a secondary drive 19 with them. This secondary drive 19 can be arranged on the same engine face as the camshaft gears 10, 11, 12. It However, it is also possible to arrange it at any point between two bearings of the cylinder head 4, 5, for example between the first and second bearings or on the flywheel side.

In das Nockenwellenrad 11 ist eine Verstelleinrichtung 20 üblicher Bauart integriert, von der in der Zeichnung lediglich ein Stellhebel 21 zu sehen ist. Mittels dieser Verstelleinrichtung 20 kann man eine Phasenverschiebung zwischen den Nockenwellenrädern 11 und 16 erreichen. Da das Nockenwellenrad 17 durch den Sekundärzahnriemen 18 synchron mit dem Nockenwellenrad 11 um läuft, kommt es bei ihm zu einer gleichen Phasenverschiebung in Bezug auf das Nockenwellenrad 12 der Auslaßnockenwelle 7.In the camshaft gear 11, an adjusting device 20 of conventional design is integrated, of which only one control lever 21 can be seen in the drawing. By means of this adjusting device 20, a phase shift between the camshaft sprockets 11 and 16 can be achieved. Since the camshaft gear 17 runs through the secondary toothed belt 18 in synchronism with the camshaft gear 11, it has the same phase shift with respect to the camshaft gear 12 of the exhaust camshaft 7.

Es sei abschließend angemerkt, daß die Nockenwellenantriebe statt über Zahnriemen natürlich auch mit Ketten erfolgen können.It should finally be noted that the camshaft drives can of course also be done with chains instead of toothed belts.

Claims (4)

Brennkraftmaschine mit zwei v-förmig angeordneten Zylinderreihen, oberhalb deren Zylinderköpfe jeweils zur Betätigung der Auslaßventile eine Auslaßnockenwelle und zur Betätigung der Einlaßventile eine Einlaßnockenwelle angeordnet ist, wobei der Antrieb der beiden Auslaßnockenwellen und Einlaßnockenwellen mittels eines von der Kurbelwelle angetriebenen Zahnriemens erfolgt und die Winkelstellung der Einlaßnockenwellen relativ zu den Auslaßnockenwellen mittels einer Verstelleinrichtung veränderbar ist, dadurch gekennzeichnet, daß zumindest eine Einlaßnockenwelle (8) und eine Auslaßnockenwelle (6) unmittelbar vom Zahnriemen (13) der Kurbelwelle (15) angetrieben ist und zumindest eine Nockenwelle (9) der anderen Zylinderreihe (2) mittels eines Sekundärantriebs (19) getrieblich mit der entsprechenden Nockenwelle (8) der ersten Zylinderreihe (3) verbunden ist und daß nur die unmittelbar vom Zahnriemen (13) der Kurbelwelle (15) angetriebenen Nockenwelle (8) mit dem Sekundärantrieb (19) eine Verstelleinrichtung (20) hat.Internal combustion engine with two V-shaped rows of cylinders, above the cylinder heads of which an exhaust camshaft is arranged to actuate the exhaust valves and an intake camshaft to actuate the intake valves, the two exhaust camshafts and intake camshafts being driven by means of a toothed belt driven by the crankshaft and the angular position of the intake camshafts can be changed relative to the exhaust camshafts by means of an adjusting device, characterized in that at least one intake camshaft (8) and one exhaust camshaft (6) are driven directly by the toothed belt (13) of the crankshaft (15) and at least one camshaft (9) of the other row of cylinders ( 2) by means of a secondary drive (19) with the corresponding camshaft (8) of the first row of cylinders (3) and that only the camshaft (8) directly driven by the toothed belt (13) of the crankshaft (15) is connected to the secondary drive (19) has an adjusting device (20). Brennkraftmaschine nach Anspruch 1, dadurch gekenn zeichnet, daß der Zahnriemen (13) über jeweils ein Nockenwellenrad (10, 12) jeder Auslaßnockenwelle (6, 7) und ein Nockenwellenrad (11) einer Einlaßnockenwelle (8) geführt ist, daß die zweite Einlaßnockenwelle (9) durch den Sekundärantrieb (19) getrieblich mit der ersten, vom Zahnriemen (13) angetriebenen Einlaßnockenwelle (8) verbunden ist und daß nur das Nockenwellenrad (11) der vom Zahnriemen (13) der Kurbelwelle (15) angetriebenen Einlaßnockenwelle (8) die Verstelleinrichtung (20) aufweist.Internal combustion engine according to claim 1, characterized in that the toothed belt (13) is guided via a camshaft sprocket (10, 12) of each exhaust camshaft (6, 7) and a camshaft sprocket (11) of an intake camshaft (8) in that the second intake camshaft ( 9) through the secondary drive (19) is connected to the first inlet camshaft (8) driven by the toothed belt (13) and that only the camshaft sprocket (11) is driven by the inlet camshaft (8) driven by the toothed belt (13) of the crankshaft (15) Has adjusting device (20). Brennkaftmaschine nach den Ansprüchen 1 oder 2, da durch gekennzeichnet, daß der Sekundärantrieb (19) durch ein zweites Nockenwellenrad (16) auf der ersten Einlaßnockenwelle (8), ein durchmessergleiches Nockenwellenrad (17) auf der zweiten Einlaßnockenwelle (9) und einen über diese Nockenwellenräder (16, 17) geführten Sekundär-zahnriemen (18) erfolgt.Brennkaftmaschine according to claims 1 or 2, as by in that the secondary drive (19) by a second camshaft sprocket (16) on said first intake camshaft (8), a diameter the same camshaft (17) on said second intake camshaft (9) and this Camshaft sprockets (16, 17) guided secondary timing belt (18). Brennkraftmaschine nach zumindest einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Durchmesser der Nockenwellenräder (16, 17) des Sekundärantriebes (19) geringer ist als der Durchmesser der Nockenwellenräder (10, 11, 12), welche vom Zahnriemen (13) der Kurbelwelle (15) angetrieben sind.Internal combustion engine according to at least one of the preceding claims, characterized in that the diameter of the camshaft sprockets (16, 17) of the secondary drive (19) is smaller than the diameter of the camshaft sprockets (10, 11, 12) which is released from the toothed belt (13) of the crankshaft ( 15) are driven.
EP91100763A 1990-01-25 1991-01-22 Camshafts control drive for a V type engine Ceased EP0441167A1 (en)

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DE19904002080 DE4002080A1 (en) 1990-01-25 1990-01-25 INTERNAL COMBUSTION ENGINE

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DE4344501A1 (en) * 1993-12-24 1995-06-29 Audi Ag Multi-cylinder internal combustion engine
GB2316446A (en) * 1996-08-22 1998-02-25 Fuji Heavy Ind Ltd Overhead camshaft driving mechanism for V-type or horizontally-opposed i.c. engine

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DE4205505A1 (en) * 1992-02-22 1993-08-26 Teves Gmbh Alfred Adjustable camshaft drive for IC engine - has identical angular adjustment, dependent upon engine load for identical camshafts
JP4327645B2 (en) * 2004-04-13 2009-09-09 三菱ふそうトラック・バス株式会社 Variable valve operating device for V-type engine

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4344501A1 (en) * 1993-12-24 1995-06-29 Audi Ag Multi-cylinder internal combustion engine
US5622143A (en) * 1993-12-24 1997-04-22 Audi Ag Multi-cylinder internal combustion engine
GB2316446A (en) * 1996-08-22 1998-02-25 Fuji Heavy Ind Ltd Overhead camshaft driving mechanism for V-type or horizontally-opposed i.c. engine
GB2316446B (en) * 1996-08-22 1998-09-30 Fuji Heavy Ind Ltd Camshaft driving mechanism

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