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EP1085173A2 - Valve drive for an internal combustion engine - Google Patents

Valve drive for an internal combustion engine Download PDF

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Publication number
EP1085173A2
EP1085173A2 EP00117265A EP00117265A EP1085173A2 EP 1085173 A2 EP1085173 A2 EP 1085173A2 EP 00117265 A EP00117265 A EP 00117265A EP 00117265 A EP00117265 A EP 00117265A EP 1085173 A2 EP1085173 A2 EP 1085173A2
Authority
EP
European Patent Office
Prior art keywords
control drive
internal combustion
combustion engine
crankshaft
carrier unit
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
EP00117265A
Other languages
German (de)
French (fr)
Other versions
EP1085173A3 (en
EP1085173B1 (en
Inventor
Jürgen Endeward
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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 Volkswagen AG filed Critical Volkswagen AG
Publication of EP1085173A2 publication Critical patent/EP1085173A2/en
Publication of EP1085173A3 publication Critical patent/EP1085173A3/en
Application granted granted Critical
Publication of EP1085173B1 publication Critical patent/EP1085173B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • F01L1/02—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
    • F01L1/026—Gear drive
    • 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
    • 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
    • F02B2075/1804—Number of cylinders
    • F02B2075/184—Number of cylinders ten

Definitions

  • the invention relates to a control drive for an internal combustion engine according to the genus Claim 1 from.
  • control drives known from US Pat. No. 4,671,223 are used to transfer the engine speed to control elements (e.g. camshafts for valve actuation) and auxiliary units (e.g. generator, pumps) and are preferred designed as belt or wheel drives.
  • the engine speed is controlled by the crankshaft and a corresponding crankshaft gear is introduced into the timing gear and there via appropriate intermediate gears or belts to the individual units to be driven forwarded or redirected.
  • the carrier unit for the gears to provide the timing drive with a backlash that compensates for backlash between the individual gears and between the carrier unit and the housing of the internal combustion engine enables.
  • the known carrier for a control drive of an internal combustion engine in particular a gear wheel drive, however, has the disadvantage that it is due to its articulation the crankshaft can only be fixed in a complex manner via a ball bearing bearing and additional Space required in the axial direction on the internal combustion engine.
  • the Backlash compensation on the mounting of the carrier on the internal combustion engine housing remote from the crankshaft by means of elastic O-rings not sufficient, especially in axial It is hardly possible to compensate for play in the direction of the fastening bolts.
  • the invention is therefore based on the object of fastening the carrier unit of the control drive on the housing of the internal combustion engine so that it is easy to manufacture Sufficient clearance compensation between the engine housing and the carrier unit.
  • the control drive according to the invention for an internal combustion engine with the characteristic Features of claim 1 has the advantage over the prior art that with simple means a space-saving attachment of the support unit to the housing of Internal combustion engine is possible, which also includes a game compensation elements, preferably hydraulic lash adjusters allows a sufficient Compensation for play between the internal combustion engine housing and the carrier unit of the Ensure timing drive.
  • the carrier unit is in a region close to the crankshaft directly attached to the housing of the internal combustion engine, this direct attachment preferably via a screw connection.
  • crankshaft of the internal combustion engine protrudes thereby with the crankshaft gear arranged thereon for driving the timing drive through a corresponding opening in the support unit, said screw connection the carrier unit on the internal combustion engine housing, preferably at the edge of this opening, distributed evenly over their circumference.
  • a further overhead fastening is provided for the carrier unit, which however, takes place via lash adjusters on the area of the engine housing remote from the crankshaft are articulated.
  • This mounting arrangement of the carrier unit on the internal combustion engine is in particular advantageous for internal combustion engines in which the crankshaft below leading area of the internal combustion engine housing consists of a different material than the overhead area remote from the crankshaft.
  • a motor can, for example, as V-engine can be formed, the plurality of V-shaped cylinder banks arranged to each other has in the area of the cylinder crankcase, which is on a common Bearing bracket for guiding the crankshaft.
  • the bearing bracket from one high-strength material, e.g. a hardened cast iron alloy and the cylinder banks or the cylinder crankcase made of a light alloy to reduce weight manufacture.
  • this has the disadvantage that both components with a corresponding Heat introduction of the internal combustion engine during its operation is different Have thermal expansion, especially on attachments attached to both components can lead to considerable tension.
  • the necessary additional upper guide of the carrier unit on the cylinder crankcase is advantageously designed as a play compensation element, so that tension in Result of different thermal expansion of the components in the area of the top Attachment can be compensated and so not even in the carrier unit in the Cylinder crankcase are initiated. It is particularly advantageous for the overhead one Attachment to be formed simultaneously as a play compensation element, since it is therefore an additional one Component can be dispensed with.
  • the formation of the play compensation element as a hydraulic play compensation element has the advantage that in addition to a game compensation also a damping of the initiated Vibrations in the game compensation element can take place.
  • the game compensation element is thereby designed in an advantageous manner so that in addition to axial play compensation radial play and a tilting movement of the carrier unit can accommodate.
  • the carrier unit is advantageously formed from two carrier plates, between which preferably all the wheels of the control drive are arranged in one plane, so that the Control drive overall requires very little installation space in the axial direction to the internal combustion engine.
  • the gears of the control drive in the carrier unit can thus be of the type pre-assemble a wheel cassette, which is then attached to the internal combustion engine as a prefabricated module can be attached, which simplifies the manufacture of the entire internal combustion engine.
  • the two carrier plates of the carrier unit are preferably each in one piece formed and have recesses between the individual gear bearings on. However, it is alternatively also possible to form the carrier plates in several pieces and accordingly connect to.
  • FIG. 1 shows a housing 1 of an internal combustion engine with two V-shaped arrangements Cylinder banks of a cylinder crankcase 3, which at its lower end a split bearing bracket 5 for receiving a crankshaft, not shown.
  • the cylinder crankcase 3 made of an aluminum alloy and the bearing bracket 5 made from a cast iron.
  • the bearing bracket 5 made from a cast iron.
  • Carrier unit 9 is screwed.
  • FIG. 2 shows a view of the carrier unit 9 on the motor housing side, in addition for this purpose is shown in FIG. 3 in a longitudinal section along section line III and which is preferably also made of gray cast iron.
  • the carrier unit 9 has two carrier plates 11, between which a plurality of gears 13 of the control drive are arranged on the corresponding bearings on the Carrier plates 11 are arranged and guided in a common plane.
  • the individual carrier plates 11 preferably formed in one piece, but can also be made of consist of several parts.
  • the carrier unit 9 has a circular in its lower region Recess 15 in which the crankshaft, not shown, with an arranged thereon Crankshaft gear protrudes, the crankshaft gear with a Intermediate gear 17 meshes and so the rotational movement of the crankshaft in the timing gear initiates where this is known to the control members via appropriate intermediate gears, e.g. Camshafts for the valve train and auxiliary units, e.g. Pumping the Internal combustion engine is forwarded.
  • intermediate gears e.g. Camshafts for the valve train and auxiliary units, e.g. Pumping the Internal combustion engine is forwarded.
  • the attachment of the preassembled carrier unit 9 to the housing 1 of the internal combustion engine takes place in the area near the crankshaft via three mounting holes 19 in the carrier plates 11, some of which also have supports for bearings which are enlarged in cross section form individual gears of the gear train and on which the carrier unit 9 on the receiving bores 7 are screwed into the bearing bracket 5.
  • the carrier unit 9 of the control drive is via two hydraulic ones Backlash compensation elements 21 on the cylinder crankcase 3 of the internal combustion engine attached. These are preferably arranged at the same height above the crankshaft Game compensation elements 21 allow game compensation in the axial and radial Direction and a tilting movement, wherein an internal piston 23 does not have a shown screwing on the wall of the cylinder crankcase 3 in the region of the cylinder bank end face is attached while an outer cylinder 25 of the hydraulic Backlash compensation element 21 is connected to the carrier plates 11 of the carrier unit 9.
  • the piston 23 delimits two opposite one another via elastic seals 27 acting hydraulic working spaces 29 in the cylinder 25, via an overflow channel communicate with each other and thus enable game compensation and cushioning.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Gear Transmission (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

The control drive has meshing toothed gears (13,17) located on a carrier unit (9) fastened to the engine housing. The carrier unit is fastened directly to the housing via a rigid screw connection (19) in an area on the crankshaft side, and in an area away from the crankshaft, fastening is via a clearance compensation element (21). The carrier unit is formed by two plates (11) enclosing the gears. It consists of a material, which has approx. the same heat expansion characteristics of the material of the bearing web.

Description

Stand der TechnikState of the art

Die Erfindung geht von einem Steuertrieb für eine Brennkraftmaschine nach der Gattung des Patentanspruchs 1 aus. Derartige, z.B. aus der Schrift US 4,671,223 bekannte Steuertriebe dienen dabei zur Übertragung der Motordrehzahl auf Steuerglieder (z.B. Nockenwellen für die Ventilbetätigung) und Nebenaggregate (z.B. Generator, Pumpen) und sind vorzugsweise als Riemen- oder Rädertriebe ausgebildet. Dabei wird die Motordrehzahl über die Kurbelwelle und ein entsprechendes Kurbelwellenzahnrad in den Steuertrieb eingeleitet und dort über entsprechende Zwischenzahnräder oder Riemen an die einzelnen anzutreibenden Aggregate weiter- bzw. umgelenkt.The invention relates to a control drive for an internal combustion engine according to the genus Claim 1 from. Such, e.g. control drives known from US Pat. No. 4,671,223 are used to transfer the engine speed to control elements (e.g. camshafts for valve actuation) and auxiliary units (e.g. generator, pumps) and are preferred designed as belt or wheel drives. The engine speed is controlled by the crankshaft and a corresponding crankshaft gear is introduced into the timing gear and there via appropriate intermediate gears or belts to the individual units to be driven forwarded or redirected.

Bei dem oben genannten, als Rädertrieb ausgebildeten bekannten Steuertrieb einer Brennkraftmaschine sind die Zahnräder dabei wenigstens zum Teil in einer Trägereinheit aufgenommen, die aus zwei Trägerplatten gebildet ist, zwischen denen die Zahnräder geführt sind.In the case of the known control drive of an internal combustion engine, which is designed as a wheel drive the gears are at least partially accommodated in a carrier unit, which is formed from two carrier plates, between which the gears are guided are.

Da es infolge der hohen Wärmeentwicklung der Brennkraftmaschine während deren Betriebs zu einer ungleichen Ausdehnung der zum Teil aus unterschiedlichen Werkstoffen bestehenden einzelnen Gehäuseteile der Brennkraftmaschine und des Rädertriebs kommen kann, ist es weiterhin z.B. aus der Schrift DE 37 39 243 bekannt, die Trägereinheit für die Zahnräder des Steuertriebs mit einem Spielausgleich zu versehen, der einen Spielausgleich zwischen den einzelnen Zahnrädern und zwischen der Trägereinheit und dem Gehäuse der Brennkraftmaschine ermöglicht.Since it is due to the high heat development of the internal combustion engine during its operation to an uneven expansion of the partially made of different materials individual housing parts of the internal combustion engine and the wheel drive can come it continues e.g. known from DE 37 39 243, the carrier unit for the gears to provide the timing drive with a backlash that compensates for backlash between the individual gears and between the carrier unit and the housing of the internal combustion engine enables.

Dabei weist der bekannte Träger für einen Steuertrieb einer Brennkraftmaschine, insbesondere einen Zahnrad-Rädertrieb jedoch den Nachteil auf, daß er durch seine Anlenkung auf der Kurbelwelle über eine Kugellager-Lagerung nur aufwendig zu fixieren ist und zusätzlichen Bauraum in Achsrichtung an der Brennkraftmaschine beansprucht. Zudem ist der Spielausgleich an der kurbelwellenfernen Befestigung des Trägers am Brennkraftmaschinen-Gehäuse mittels elastischer O-Ringe nicht ausreichend, wobei insbesondere in axialer Richtung der Befestigungsbolzen kaum ein Spielausgleich möglich ist. The known carrier for a control drive of an internal combustion engine, in particular a gear wheel drive, however, has the disadvantage that it is due to its articulation the crankshaft can only be fixed in a complex manner via a ball bearing bearing and additional Space required in the axial direction on the internal combustion engine. In addition, the Backlash compensation on the mounting of the carrier on the internal combustion engine housing remote from the crankshaft by means of elastic O-rings not sufficient, especially in axial It is hardly possible to compensate for play in the direction of the fastening bolts.

Der Erfindung liegt somit die Aufgabe zugrunde, die Befestigung der Trägereinheit des Steuertriebs am Gehäuse der Brennkraftmaschine so auszulegen, daß sie in einfach zu fertigender Weise einen ausreichenden Spielausgleich zwischen dem Brennkraftmaschinengehäuse und der Trägereinheit ermöglicht.The invention is therefore based on the object of fastening the carrier unit of the control drive on the housing of the internal combustion engine so that it is easy to manufacture Sufficient clearance compensation between the engine housing and the carrier unit.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Steuertrieb für eine Brennkraftmaschine mit den kennzeichnenden Merkmalen des Patentanspruchs 1 hat gegenüber dem Stand der Technik den Vorteil, daß mit einfachen Mitteln eine bauraumsparende Befestigung der Trägereinheit am Gehäuse der Brennkraftmaschine möglich ist, die zudem eine Aufnahme von Spielausgleichselementen, vorzugsweise hydraulischen Spielausgleichselementen ermöglicht, die einen ausreichenden Spielausgleich zwischen dem Brennkraftmaschinengehäuse und der Trägereinheit des Steuertriebs gewährleisten. Dazu ist die Trägereinheit in einem kurbelwellennahen Bereich direkt am Gehäuse der Brennkraftmaschine befestigt, wobei diese direkte Befestigung vorzugsweise über eine Verschraubung erfolgt. Die Kurbelwelle der Brennkraftmaschine ragt dabei mit dem darauf angeordneten Kurbelwellenzahnrad zum Antrieb des Steuertriebs durch eine entsprechende Öffnung in der Trägereinheit, wobei die genannte Verschraubung der Trägereinheit am Brennkraftmaschinengehäuse vorzugsweise am Rand dieser Öffnung, gleichmäßig über deren Umfang verteilt erfolgt. Zusätzlich zu dieser untenliegenden Befestigung der Trägereinheit ist eine weitere obenliegende Befestigung vorgesehen, die dabei jedoch über Spielausgleichselemente erfolgt, die am kurbelwellenfernen Bereich des Brennkraftmaschinengehäuses angelenkt sind.The control drive according to the invention for an internal combustion engine with the characteristic Features of claim 1 has the advantage over the prior art that with simple means a space-saving attachment of the support unit to the housing of Internal combustion engine is possible, which also includes a game compensation elements, preferably hydraulic lash adjusters allows a sufficient Compensation for play between the internal combustion engine housing and the carrier unit of the Ensure timing drive. For this purpose, the carrier unit is in a region close to the crankshaft directly attached to the housing of the internal combustion engine, this direct attachment preferably via a screw connection. The crankshaft of the internal combustion engine protrudes thereby with the crankshaft gear arranged thereon for driving the timing drive through a corresponding opening in the support unit, said screw connection the carrier unit on the internal combustion engine housing, preferably at the edge of this opening, distributed evenly over their circumference. In addition to this attachment below A further overhead fastening is provided for the carrier unit, which however, takes place via lash adjusters on the area of the engine housing remote from the crankshaft are articulated.

Dabei ist diese Befestigungsanordnung der Trägereinheit an der Brennkraftmaschine insbesondere bei Brennkraftmaschinen vorteilhaft, bei denen der untenliegende, die Kurbelwelle führende Bereich des Brennkraftmaschinengehäuses aus einem anderen Werkstoff besteht als der obenliegende kurbelwellenferne Bereich. Ein derartiger Motor kann zum Beispiel als V-Motor ausgebildet sein, der eine Vielzahl von V-förmig zueinander angeordnete Zylinderbänke im Bereich des Zylinderkurbelgehäuses aufweist, die dabei an einer gemeinsamen Lagerbrücke zur Führung der Kurbelwelle anliegen. Dabei ist es bei derartigen Brennkraftmaschinen mit einer Lagerbrücke vorteilhaft und daher üblich, die Lagerbrücke aus einem hochfesten Werkstoff, z.B. einer gehärteten Grauguß-Legierung und die Zylinderbänke bzw. das Zylinderkurbelgehäuse zur Gewichtsreduzierung aus einer Leichtmetall-Legierung zu fertigen. Dies hat dabei jedoch den Nachteil, daß beide Bauteile bei einer entsprechenden Wärmeeinleitung der Brennkraftmaschine während deren Betriebs eine unterschiedliche Wärmeausdehnung aufweisen, was insbesondere an, an beiden Bauteilen befestigten Anbauteilen zu erheblichen Verspannungen führen kann.This mounting arrangement of the carrier unit on the internal combustion engine is in particular advantageous for internal combustion engines in which the crankshaft below leading area of the internal combustion engine housing consists of a different material than the overhead area remote from the crankshaft. Such a motor can, for example, as V-engine can be formed, the plurality of V-shaped cylinder banks arranged to each other has in the area of the cylinder crankcase, which is on a common Bearing bracket for guiding the crankshaft. It is in such internal combustion engines advantageous with a bearing bracket and therefore usual, the bearing bracket from one high-strength material, e.g. a hardened cast iron alloy and the cylinder banks or the cylinder crankcase made of a light alloy to reduce weight manufacture. However, this has the disadvantage that both components with a corresponding Heat introduction of the internal combustion engine during its operation is different Have thermal expansion, especially on attachments attached to both components can lead to considerable tension.

Dies wird in vorteilhafter Weise durch die erfindungsgemäße Befestigung der Trägereinheit des Steuertriebs vermieden, indem die Trägereinheit nur an einem Motorgehäusebauteil fest angeordnet ist und somit deren Wärmeausdehnung mit durchführt. Dabei ist es besonders vorteilhaft, die Trägereinheit aus einem gleichen oder ähnlichen Werkstoff wie das Bauteil an dem es fest angeordnet ist (Lagerbrücke) auszubilden, da somit beide Bauteile ein ähnliches Wärmeausdehnungsverhalten aufweisen und Spannungen zwischen diesen Bauteilen vermieden werden können. Da im Bereich der Trägereinheit eine Vielzahl von Führungen und Lagerungen vorgesehen sind, die mit hoher Toleranzgenauigkeit und Festigkeit ausgeführt sein müssen, ist es zudem vorteilhaft auch die Trägereinheit aus einem gehärteten Grauguß zu fertigen.This is advantageously achieved by fastening the carrier unit according to the invention of the timing drive avoided by the carrier unit fixed only to a motor housing component is arranged and thus carries out their thermal expansion. It is special advantageous to the carrier unit made of the same or similar material as the component which it is permanently arranged (bearing bridge), since both components are therefore similar Have thermal expansion behavior and avoid stresses between these components can be. Since in the area of the carrier unit a variety of guides and Bearings are provided that run with high tolerance accuracy and strength must be, it is also advantageous the carrier unit made of a hardened gray cast iron to manufacture.

Die notwendige zusätzliche obere Führung der Trägereinheit am Zylinderkurbelgehäuse ist in vorteilhafter Weise als Spielausgleichselement ausgebildet, so daß Verspannungen in Folge unterschiedlicher Wärmeausdehnungen der Bauteile im Bereich der obenliegenden Befestigung ausgeglichen werden können und so gar nicht erst über die Trägereinheit in das Zylinderkurbelgehäuse eingeleitet werden. Dabei ist es besonders vorteilhaft die obenliegende Befestigung gleichzeitig als Spielausgleichselement auszubilden, da somit auf ein zusätzliches Bauteil verzichtet werden kann.The necessary additional upper guide of the carrier unit on the cylinder crankcase is advantageously designed as a play compensation element, so that tension in Result of different thermal expansion of the components in the area of the top Attachment can be compensated and so not even in the carrier unit in the Cylinder crankcase are initiated. It is particularly advantageous for the overhead one Attachment to be formed simultaneously as a play compensation element, since it is therefore an additional one Component can be dispensed with.

Die Ausbildung des Spielausgleichselementes als hydraulisches Spielausgleichselement hat dabei den Vorteil, daß neben einem Spielausgleich auch eine Dämpfung der eingeleiteten Schwingungen im Spielausgleichselement erfolgen kann. Das Spielausgleichselement ist dabei in vorteilhafter Weise so ausgebildet, daß es neben einem axialen Spielausgleich auch radiales Spiel und eine Kippbewegung der Trägereinheit aufnehmen kann.The formation of the play compensation element as a hydraulic play compensation element has the advantage that in addition to a game compensation also a damping of the initiated Vibrations in the game compensation element can take place. The game compensation element is thereby designed in an advantageous manner so that in addition to axial play compensation radial play and a tilting movement of the carrier unit can accommodate.

Die Trägereinheit ist in vorteilhafter Weise aus zwei Trägerplatten gebildet, zwischen denen vorzugsweise sämtliche Räder des Steuertriebs in einer Ebene angeordnet sind, so daß der Steuertrieb insgesamt sehr wenig Bauraum in Achsrichtung zur Brennkraftmaschine benötigt. Zudem lassen sich somit die Zahnräder des Steuertriebs in der Trägereinheit in der Art einer Räderkassette vormontieren, die dann als vorgefertigtes Modul an die Brennkraftmaschine angebracht werden kann, was die Fertigung der gesamten Brennkraftmaschine vereinfacht. Die beiden Trägerplatten der Trägereinheit sind dabei vorzugsweise jeweils einstückig ausgebildet und weisen zwischen den einzelnen Zahnradlagerungen Ausnehmungen auf. Es ist jedoch alternativ auch möglich die Trägerplatten mehrstückig ausbilden und entsprechend zu verbinden. The carrier unit is advantageously formed from two carrier plates, between which preferably all the wheels of the control drive are arranged in one plane, so that the Control drive overall requires very little installation space in the axial direction to the internal combustion engine. In addition, the gears of the control drive in the carrier unit can thus be of the type pre-assemble a wheel cassette, which is then attached to the internal combustion engine as a prefabricated module can be attached, which simplifies the manufacture of the entire internal combustion engine. The two carrier plates of the carrier unit are preferably each in one piece formed and have recesses between the individual gear bearings on. However, it is alternatively also possible to form the carrier plates in several pieces and accordingly connect to.

Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstandes der Erfindung sind der Beschreibung, der Zeichnung und den Ansprüchen entnehmbar.Further advantages and advantageous embodiments of the subject matter of the invention are Description, the drawing and the claims can be removed.

Zeichnungdrawing

Ein Ausführungsbeispiel des erfindungsgemäßen Steuertriebs für eine Brennkraftmaschine ist in der Zeichnung dargestellt und wird in der folgenden Beschreibung näher erläutert.An embodiment of the control drive according to the invention for an internal combustion engine is shown in the drawing and is explained in more detail in the following description.

Es zeigen die

Figur 1:
eine vereinfachte Darstellung des Gehäuses der Brennkraftmaschine,
Figur 2:
eine Darstellung der Trägereinheit mit eingesetzten Zahnrädern des Steuertriebs und
Figur 3:
einen Längsschnitt durch die Trägereinheit der Figur 2 entlang der Schnittlinie III.
They show
Figure 1:
a simplified representation of the housing of the internal combustion engine,
Figure 2:
a representation of the carrier unit with inserted gears of the timing drive and
Figure 3:
a longitudinal section through the carrier unit of Figure 2 along the section line III.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Die Figur 1 zeigt ein Gehäuse 1 einer Brennkraftmaschine mit zwei V-förmig zueinander angeordneten Zylinderbänken eines Zylinderkurbelgehäuses 3, die an ihrem unteren Ende an einer geteilten Lagerbrücke 5 zur Aufnahme einer nicht gezeigten Kurbelwelle anliegen. Dabei ist das Zylinderkurbelgehäuse 3 aus einer Aluminium-Legierung und die Lagerbrücke 5 aus einem Grauguß gefertigt. Zur Aufnahme einer Trägereinheit eines Steuertriebs der Brennkraftmaschine sind in einer Stirnfläche des oberen Lagerbrückenteils 5A im Ausführungsbeispiel drei Aufnahmebohrungen 7 vorgesehen, an der eine in der Figur 2 dargestellte Trägereinheit 9 verschraubt ist.FIG. 1 shows a housing 1 of an internal combustion engine with two V-shaped arrangements Cylinder banks of a cylinder crankcase 3, which at its lower end a split bearing bracket 5 for receiving a crankshaft, not shown. there is the cylinder crankcase 3 made of an aluminum alloy and the bearing bracket 5 made from a cast iron. To accommodate a carrier unit of a timing drive Internal combustion engine are in an end face of the upper bearing bracket part 5A in the embodiment three receiving bores 7 are provided, on the one shown in Figure 2 Carrier unit 9 is screwed.

Dabei zeigt die Figur 2 eine motorgehäuseseitige Ansicht der Trägereinheit 9, die ergänzend dazu in der Figur 3 in einer Längschnittdarstellung entlang der Schnittlinie III dargestellt ist und die vorzugsweise ebenfalls aus einem Grauguß gefertigt ist.FIG. 2 shows a view of the carrier unit 9 on the motor housing side, in addition for this purpose is shown in FIG. 3 in a longitudinal section along section line III and which is preferably also made of gray cast iron.

Die Trägereinheit 9 weist zwei Trägerplatten 11 auf, zwischen denen eine Vielzahl von Zahnrädern 13 des Steuertriebs angeordnet sind, die auf entsprechenden Lagerungen an den Trägerplatten 11 in einer gemeinsamen Ebene angeordnet und geführt sind. Dabei sind die einzelnen Trägerplatten 11 vorzugsweise einstückig ausgebildet, können jedoch auch aus mehreren Teilen bestehen. Die Trägereinheit 9 weist in ihrem unteren Bereich eine kreisförmige Ausnehmung 15 auf, in die die nicht dargestellte Kurbelwelle mit einem darauf angeordneten Kurbelwellenzahnrad hineinragt, wobei das Kurbelwellenzahnrad dabei mit einem Zwischenzahnrad 17 kämmt und so die Drehbewegung der Kurbelwelle in den Steuertrieb einleitet, wo diese über entsprechende Zwischenzahnräder in bekannter Weise an die Steuerglieder, z.B. Nockenwellen für den Ventiltrieb und Nebenaggregate, z.B. Pumpen der Brennkraftmaschine weitergeleitet wird.The carrier unit 9 has two carrier plates 11, between which a plurality of gears 13 of the control drive are arranged on the corresponding bearings on the Carrier plates 11 are arranged and guided in a common plane. Here are the individual carrier plates 11 preferably formed in one piece, but can also be made of consist of several parts. The carrier unit 9 has a circular in its lower region Recess 15 in which the crankshaft, not shown, with an arranged thereon Crankshaft gear protrudes, the crankshaft gear with a Intermediate gear 17 meshes and so the rotational movement of the crankshaft in the timing gear initiates where this is known to the control members via appropriate intermediate gears, e.g. Camshafts for the valve train and auxiliary units, e.g. Pumping the Internal combustion engine is forwarded.

Die Befestigung der vormontierten Trägereinheit 9 am Gehäuse 1 der Brennkraftmaschine erfolgt dabei im kurbelwellennahen Bereich über drei Befestigungsbohrungen 19 in den Trägerplatten 11, die zum Teil über im Querschnitt vergrößerte Stutzen auch Lagerungen für einzelne Zahnräder des Rädertriebs bilden und an denen die Trägereinheit 9 an den Aufnahmebohrungen 7 in der Lagerbrücke 5 verschraubt werden.The attachment of the preassembled carrier unit 9 to the housing 1 of the internal combustion engine takes place in the area near the crankshaft via three mounting holes 19 in the carrier plates 11, some of which also have supports for bearings which are enlarged in cross section form individual gears of the gear train and on which the carrier unit 9 on the receiving bores 7 are screwed into the bearing bracket 5.

An seinem kurbelwellenfernen Ende ist die Trägereinheit 9 des Steuertriebs über zwei hydraulische Spielausgleichselemente 21 am Zylinderkurbelgehäuse 3 der Brennkraftmaschine befestigt. Diese vorzugsweise in gleicher Höhe über der Kurbelwelle angeordneten Spielausgleichselemente 21 ermöglichen dabei einen Spielausgleich in axialer und radialer Richtung sowie eine Kippbewegung, wobei ein innenliegender Kolben 23 über eine nicht gezeigte Verschraubung an der Wand des Zylinderkurbelgehäuses 3 im Bereich der Zylinderbankstirnfläche befestigt ist, während ein außenliegender Zylinder 25 des hydraulischen Spielausgleichselementes 21 mit den Trägerplatten 11 der Trägereinheit 9 verbunden ist.At its end remote from the crankshaft, the carrier unit 9 of the control drive is via two hydraulic ones Backlash compensation elements 21 on the cylinder crankcase 3 of the internal combustion engine attached. These are preferably arranged at the same height above the crankshaft Game compensation elements 21 allow game compensation in the axial and radial Direction and a tilting movement, wherein an internal piston 23 does not have a shown screwing on the wall of the cylinder crankcase 3 in the region of the cylinder bank end face is attached while an outer cylinder 25 of the hydraulic Backlash compensation element 21 is connected to the carrier plates 11 of the carrier unit 9.

Der Kolben 23 begrenzt dabei über elastische Dichtungen 27 zwei entgegengesetzt zueinander wirkende hydraulische Arbeitsräume 29 im Zylinder 25, die über einen Überströmkanal miteinander kommunizieren und so den Spielausgleich und eine Dämpfung ermöglichen.The piston 23 delimits two opposite one another via elastic seals 27 acting hydraulic working spaces 29 in the cylinder 25, via an overflow channel communicate with each other and thus enable game compensation and cushioning.

Dabei ist es über die Beschränkung der starren Verbindung zwischen Trägereinheit 9 und Brennkraftmaschinengehäuse 1 auf einen Bereich mit gleichen Werkstoffen in erfindungsgemäßer Weise möglich, Verspannungen innerhalb der Trägereinheit 9 infolge der Wärmeaufnahme von der Brennkraftmaschine zu minimieren, wobei die zweite notwendige Anlenkung der Trägereinheit 9 des Steuertriebs über Spielausgleichselemente 21 erfolgt.It is about the limitation of the rigid connection between the support unit 9 and Internal combustion engine housing 1 on an area with the same materials in the inventive Possible way, tension within the support unit 9 due to the heat absorption to minimize from the internal combustion engine, the second necessary articulation the carrier unit 9 of the control drive takes place via play compensation elements 21.

Claims (12)

Steuertrieb für eine Brennkraftmaschine mit wenigstens zwei miteinander kämmenden Zahnrädern, die von einem Kurbeltrieb der Brennkraftmaschine rotierend antreibbar sind und die Drehbewegung der Kurbelwelle auf Steuerglieder und Nebenaggregate der Brennkraftmaschine übertragen, wobei die Zahnräder (13, 17) auf einer Trägereinheit (9) angeordnet sind, die zumindest mittelbar am Gehäuse (1) der Brennkraftmaschine befestigt ist, dadurch gekennzeichnet, daß die Trägereinheit (9) in einem kurbelwellennahen Bereich direkt und in einem kurbelwellenfernen Bereich über ein Spielausgleichselement (21) am Gehäuse (1) der Brennkraftmaschine befestigt ist.Control drive for an internal combustion engine with at least two intermeshing gearwheels which can be driven in rotation by a crank drive of the internal combustion engine and transmit the rotary movement of the crankshaft to control elements and auxiliary units of the internal combustion engine, the gearwheels (13, 17) being arranged on a carrier unit (9), which is at least indirectly attached to the housing (1) of the internal combustion engine, characterized in that the carrier unit (9) is attached directly to the crankcase in an area close to the crankshaft and in an area remote from the crankshaft via a lash adjuster element (21) on the housing (1) of the internal combustion engine. Steuertrieb nach Anspruch 1, dadurch gekennzeichnet, daß die direkte Befestigung der Trägereinheit (9) im kurbelwellennahen Bereich über eine starre Verschraubung (7, 19) erfolgt.Control drive according to claim 1, characterized in that the direct attachment of the carrier unit (9) in the region close to the crankshaft takes place via a rigid screw connection (7, 19). Steuertrieb nach Anspruch 1, dadurch gekennzeichnet, daß die Brennkraftmaschine V-förmig zueinander angeordnete Zylinderbänke am Zylinderkurbelgehäuse (3) aufweist, die an ihrem unteren, kurbelwellenseitigen Ende an einer Lagerbrücke (5) anliegen, in der eine Kurbelwelle der Brennkraftmaschine geführt ist.Control drive according to Claim 1, characterized in that the internal combustion engine has cylinder banks on the cylinder crankcase (3) which are arranged in a V-shape and which rest on their lower end on the crankshaft side against a bearing bracket (5) in which a crankshaft of the internal combustion engine is guided. Steuertrieb nach Anspruch 3, dadurch gekennzeichnet, daß die Trägereinheit (9) im kurbelwellennahen Bereich an der Lagerbrücke (5) des Brennkraftmaschinengehäuses befestigt ist.Control drive according to claim 3, characterized in that the carrier unit (9) is fastened in the region near the crankshaft to the bearing bracket (5) of the internal combustion engine housing. Steuertrieb nach Anspruch 4, dadurch gekennzeichnet, daß die Trägereinheit (9) im kurbelwellennahen Bereich an einem oberen Teil (5A) einer geteilten Lagerbrücke (5) befestigt ist. Control drive according to Claim 4, characterized in that the carrier unit (9) is fastened in the region near the crankshaft to an upper part (5A) of a split bearing bracket (5). Steuertrieb nach Anspruch 3, dadurch gekennzeichnet, daß das Gehäuse (1) der Brennkraftmaschine im Bereich der Zylinderbänke (3) aus einer Leichtmetall-Legierung, vorzugsweise Aluminium und im Bereich der Lagerbrücke (5) aus einer Grauguß-Verbindung besteht.Control drive according to claim 3, characterized in that the housing (1) of the internal combustion engine in the area of the cylinder banks (3) consists of a light metal alloy, preferably aluminum and in the area of the bearing bridge (5) consists of a cast iron connection. Steuertrieb nach Anspruch 1, dadurch gekennzeichnet, daß die Trägereinheit (9) durch zwei Trägerplatten (11) gebildet ist, zwischen denen die einzelnen Zahnräder des Steuertriebs angeordnet sind.Control drive according to claim 1, characterized in that the carrier unit (9) is formed by two carrier plates (11), between which the individual gears of the control drive are arranged. Steuertrieb nach Anspruch 7, dadurch gekennzeichnet, daß die Trägerplatten (11) jeweils einstückig ausgebildet sind.Control drive according to claim 7, characterized in that the carrier plates (11) are each formed in one piece. Steuertrieb nach Anspruch 1, dadurch gekennzeichnet, daß sämtliche im Eingriff stehenden Zahnräder des Steuertriebs in einer Ebene angeordnet sind.Control drive according to claim 1, characterized in that all the meshing gears of the control drive are arranged in one plane. Steuertrieb nach Anspruch 1, dadurch gekennzeichnet, daß sämtliche von einem auf der Kurbelwelle angeordneten Zahnrad zumindest mittelbar angetriebenen Zahnräder des Steuertriebs an der Trägereinheit (9) angeordnet sind.Control drive according to claim 1, characterized in that all the gear wheels of the control drive, which are at least indirectly driven by a gear arranged on the crankshaft, are arranged on the carrier unit (9). Steuertrieb nach Anspruch 3, dadurch gekennzeichnet, daß die kurbelwellenferne Befestigung der Trägereinheit (9) über die Spielausgleichselemente (21) am Zylinderkurbelgehäuse (3) im Bereich der Stirnflächen der Zylinderbänke erfolgt.Control drive according to claim 3, characterized in that the mounting of the carrier unit (9) remote from the crankshaft takes place via the play compensation elements (21) on the cylinder crankcase (3) in the region of the end faces of the cylinder banks. Steuertrieb nach Anspruch 3, dadurch gekennzeichnet, daß die Trägereinheit (9) aus einem Werkstoff gefertigt ist, der zumindest annähernd das gleiche Wärmeausdehnungsverhalten wie der Werkstoff der Lagerbrücke (5) aufweist.Control drive according to claim 3, characterized in that the carrier unit (9) is made of a material which has at least approximately the same thermal expansion behavior as the material of the bearing bridge (5).
EP00117265A 1999-09-13 2000-08-16 Valve drive for an internal combustion engine Expired - Lifetime EP1085173B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19960130 1999-09-13
DE19960130A DE19960130A1 (en) 1999-09-13 1999-09-13 Control drive for an internal combustion engine

Publications (3)

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EP1085173A2 true EP1085173A2 (en) 2001-03-21
EP1085173A3 EP1085173A3 (en) 2002-04-10
EP1085173B1 EP1085173B1 (en) 2006-03-22

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AT (1) ATE321192T1 (en)
DE (2) DE19960130A1 (en)

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JP2012524855A (en) * 2009-04-22 2012-10-18 エム・テー・ウー・フリードリッヒスハーフェン・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング Internal combustion engine

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DE10160882A1 (en) * 2001-12-12 2003-06-26 Volkswagen Ag Internal combustion engine with control drive, has auxiliary unit drive at least partly attached to control housing cover
FR2898385B1 (en) * 2006-03-13 2013-02-08 Peugeot Citroen Automobiles Sa DEVICE FOR DRIVING A DISTRIBUTION OF AN INTERNAL COMBUSTION ENGINE AND INTERNAL COMBUSTION ENGINE HAVING SUCH A DEVICE
DE102006027080A1 (en) * 2006-06-10 2007-12-20 Bayerische Motoren Werke Ag Mounting strut, e.g. for a starter/generator at a motor, has the same thermal coefficient of expansion as the starter cogwheels at the crankshaft to reduce noise emissions

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Publication number Priority date Publication date Assignee Title
DE102008034725A1 (en) * 2008-07-25 2010-01-28 Man Diesel Se Internal combustion engine i.e. ship diesel engine, has control drive with housing, which is designed as separate component with respect to cylinder crank housing and is divided into two sections such as base plate and cover
JP2012524855A (en) * 2009-04-22 2012-10-18 エム・テー・ウー・フリードリッヒスハーフェン・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング Internal combustion engine

Also Published As

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DE50012429D1 (en) 2006-05-11
EP1085173A3 (en) 2002-04-10
EP1085173B1 (en) 2006-03-22
ATE321192T1 (en) 2006-04-15
DE19960130A1 (en) 2001-03-15

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