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EP0500622B1 - Dispositif d'entrainement pour un arbre a cames loge dans la culasse d'un moteur a combustion interne - Google Patents

Dispositif d'entrainement pour un arbre a cames loge dans la culasse d'un moteur a combustion interne Download PDF

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Publication number
EP0500622B1
EP0500622B1 EP90916254A EP90916254A EP0500622B1 EP 0500622 B1 EP0500622 B1 EP 0500622B1 EP 90916254 A EP90916254 A EP 90916254A EP 90916254 A EP90916254 A EP 90916254A EP 0500622 B1 EP0500622 B1 EP 0500622B1
Authority
EP
European Patent Office
Prior art keywords
camshaft
combustion engine
internal combustion
drive wheel
cylinder head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90916254A
Other languages
German (de)
English (en)
Other versions
EP0500622A1 (fr
Inventor
Wilhelm Hannibal
Johannes Steinwart
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.)
Audi AG
Original Assignee
Audi 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 Audi AG filed Critical Audi AG
Publication of EP0500622A1 publication Critical patent/EP0500622A1/fr
Application granted granted Critical
Publication of EP0500622B1 publication Critical patent/EP0500622B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01L1/34—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
    • F01L1/34403—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 using helically teethed sleeve or gear moving axially between crankshaft and camshaft
    • 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
    • F01L1/34403—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 using helically teethed sleeve or gear moving axially between crankshaft and camshaft
    • F01L1/34406—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 using helically teethed sleeve or gear moving axially between crankshaft and camshaft the helically teethed sleeve being located in the camshaft driving pulley
    • 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
    • F01L2001/0471—Assembled camshafts
    • F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2102—Adjustable

Definitions

  • the invention relates to a drive device for a camshaft mounted in the cylinder head of an internal combustion engine according to the preamble of claim 1.
  • the servomotor is arranged axially in front of the drive wheel in a machine housing cover.
  • This arrangement increases the dimension of the internal combustion engine in the longitudinal direction.
  • the internal combustion engine is installed lengthways in a motor vehicle, this leads to space problems since, for aerodynamic reasons, a flat engine compartment cover sloping forward is desired. It is therefore hardly possible to install such an internal combustion engine with variable valve control in an existing vehicle.
  • the invention has for its object to provide a drive device of the generic type with which the problems described when installing the internal combustion engine in a motor vehicle are avoided.
  • This object is achieved in that the servomotor is arranged adjacent to the end of the camshaft facing away from the drive wheel, and in that the actuator of the servomotor is connected to the switching element by a shift rod passing through the camshaft.
  • the servomotor can be accommodated without any problems since it sits at a point at which the bonnet rises towards the windshield.
  • the drive wheel and the camshaft are preferably mounted independently of one another in the cylinder head, which results in a much simpler construction than in the prior art.
  • the two external toothings of the switching element are arranged on separate sections which are connected to one another in a rotationally fixed but angularly movable manner.
  • Fig. 1, 1 denotes the cylinder head of a valve-controlled reciprocating piston internal combustion engine, in which a camshaft 3 is supported via bearings 2 and carries cams 4 with which intake and / or exhaust valves, not shown, of the internal combustion engine are actuated.
  • a drive wheel 5, which is driven by the crankshaft of the internal combustion engine, is mounted in the cylinder head 1 coaxially with the camshaft 3.
  • a switching element 6 is used, which has two axially adjacent external toothings 7 and 8, which include different angles with the longitudinal center axis of the camshaft 3.
  • the external toothing 7 is designed as a straight toothing and the external toothing 8 as a helical toothing.
  • the external toothing 8 could also be designed as a straight toothing and the external toothing 7 as a helical toothing.
  • both the external toothing 7 and the external toothing 8 are helical teeth, but with opposite or different oblique positions.
  • the external toothing 7 engages in a corresponding internal toothing 9 in the hollow hub 10 of the drive wheel 5 and the external toothing 8 engages in a corresponding internal toothing 11 in a longitudinal bore 12 of the camshaft 3.
  • the switching element 6 can be axially displaced by a servomotor 13.
  • the servomotor is arranged on the end of the camshaft 3 facing away from the drive wheel 5 and, in the exemplary embodiment, has a hydraulic cylinder 14 which is connected in a rotationally fixed manner to the camshaft 3 by its cover 20 and with its hub 22 in a bearing 15 coaxial with the camshaft bearings 2 is stored.
  • a piston 16 is displaceably arranged in the cylinder 14, from which a switching rod 17 extends, which is connected to the actuating element 6.
  • a spring 18 in the cover 20 strives to move the piston 16 into its left end position in FIG. 1.
  • the piston 16 forms a hydraulic chamber 19 with the cylinder 14.
  • a sleeve 21 is seated in the hub 22, in which a valve body 23 is slidably arranged with two longitudinal grooves 24 and 25, of which the first longitudinal groove 24 has an opening 28 in the sleeve 21 communicates with the hydraulic chamber 19 and the second longitudinal groove 25 is open to the interior of the cylinder head 1.
  • the valve body 23 is under the action of a spring 26, which strives to hold the valve body 23 in the position shown, in which the first longitudinal groove 24 via a channel 27 in the hub 22 and in the sleeve 21 in connection with the bearing 15 stands so that the hydraulic chamber 19 pressure oil is supplied from the bearing 15 and the piston 16 is moved against the action of the spring 18 in the right end position shown.
  • the valve body 23 can be moved to the right by an electromagnet 28 against the action of the spring 26.
  • the first longitudinal groove 24 is controlled by the channel 27 and the second longitudinal groove 25 through a further opening 29 in the sleeve 21 with the hydraulic chamber 19 in connection. This can reduce the pressure in the hydraulic chamber 19 and the spring 18 can move the piston 16 to the left. This causes a corresponding displacement of the actuating element 6, the camshaft 3 being rotated relative to the drive wheel 5 due to the helical teeth 8, 11
  • the drive wheel or its hub 10 is mounted in the cylinder head 1 independently of the camshaft 3.
  • the external toothings 7 and 8 of the switching element 6 can be arranged on separate sections which are connected to one another in a rotationally fixed but angularly movable manner by a cardan joint 30 indicated schematically in FIG. 2.
  • the servomotor 13 is shown in the exemplary embodiment as a hydraulic motor, the actuator (piston 16) of which is displaced in one direction by the spring 18 and in the other direction by oil pressure.
  • the actuator rod 16
  • the actuator is moved in both directions by oil pressure.
  • the arrangement of the servomotor 13 on the end of the camshaft 3 facing away from the drive wheel saves the space otherwise required for accommodating the servomotor in front of the drive wheel 5.
  • the problems in accommodating the internal combustion engine in the engine compartment of a motor vehicle are thereby considerably reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

Un dispositif d'entraînement pour un arbre à cames (3) d'un moteur à combustion interne est pourvu d'un système de rotation de l'arbre à cames (3) relativement à un pignon d'entraînement (5) coaxial, présentant un élément de commande pignon (6) qui coopère avec le pignon d'entraînement (5) par l'intermédiaire d'une denture droite (7) et avec l'arbre à cames par l'intermédiaire d'une denture hélicoïdale (8) et qui peut être déplacé axialement par un servomoteur (13). Le servomoteur (13) est situé à l'extrémité de l'arbre à cames (3) opposée au pignon d'entraînement (5). On évite ainsi que la longueur axiale du moteur à combustion interne se prolonge au-delà du pignon d'entraînement (5) à cause du servomoteur.

Claims (2)

  1. Dispositif d'entraînement pour un arbre à cames (3) logé dans la culasse (1) d'un moteur à combustion interne, comprenant un dispositif pour tourner l'arbre à cames par rapport à une roue de commande (5) coaxiale solidaire en entraînement avec le vilebrequin du moteur à combustion interne, lequel dispositif comporte un élément de couplage (6) monté co-axialement par rapport à l'arbre à cames (3) et pouvant être déplacé axialement par un servomoteur (13) entre deux positions de fin de course, qui coopère par l'intermédiaire d'un premier engrenage (7, 9) avec la roue de commande (5) et, par l'intermédiaire d'un second engrenage (8, 11), avec l'arbre à cames (3), chaque engrenage se composant d'une denture extérieure (7 et respectivement 8) prévue sur l'élément de couplage (6) et d'une denture intérieure (9 et respectivement 11) prévue dans le moyeu (10) de la roue de commande (5) et respectivement dans l'arbre à cames (3), et les deux engrenages renfermant des angles différents avec l'axe central longitudinal de l'arbre à cames, caractérisé en ce que le servomoteur (13) est disposé au voisinage de l'extrémité de l'arbre à cames (3) opposée à la roue de commande (5), et que l'organe de réglage (16) du servomoteur (13) est couplé avec l'élément de couplage (6) par une barre de commande (17) qui traverse l'arbre à cames (3).
  2. Dispositif d'entraînement selon la revendication 1, caractérisé en ce que la roue de commande (5) et l'arbre à cames (3) sont logés séparément dans la culasse (1), et que les deux dentures extérieures (7, 8) de l'élément de couplage (6) sont prévues sur des sections séparées lesquelles sont solidarisées en rotation mais de manière mobile dans le sens angulaire.
EP90916254A 1989-11-11 1990-10-26 Dispositif d'entrainement pour un arbre a cames loge dans la culasse d'un moteur a combustion interne Expired - Lifetime EP0500622B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3937628A DE3937628A1 (de) 1989-11-11 1989-11-11 Antriebsvorrichtung fuer eine im zylinderkopf einer brennkraftmaschine gelagerten nockenwelle
DE3937628 1989-11-11

Publications (2)

Publication Number Publication Date
EP0500622A1 EP0500622A1 (fr) 1992-09-02
EP0500622B1 true EP0500622B1 (fr) 1993-06-09

Family

ID=6393378

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90916254A Expired - Lifetime EP0500622B1 (fr) 1989-11-11 1990-10-26 Dispositif d'entrainement pour un arbre a cames loge dans la culasse d'un moteur a combustion interne

Country Status (4)

Country Link
US (1) US5211141A (fr)
EP (1) EP0500622B1 (fr)
DE (2) DE3937628A1 (fr)
WO (1) WO1991007574A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4331977A1 (de) * 1993-09-21 1995-03-23 Porsche Ag Variable Ventilsteuerung
JPH07238820A (ja) * 1994-02-25 1995-09-12 Ofic Co リフト量可変バルブ駆動装置
DE4406983C1 (de) * 1994-03-03 1995-03-23 Bayerische Motoren Werke Ag Vorrichtung zur relativen Drehwinkelverstellung einer Welle zu einem Antriebsrad, insbesondere Steuerwelle einer Brennkraftmaschine
KR19980049864A (ko) * 1996-12-20 1998-09-15 박병재 내연기관의 흡,배기 밸브 개폐 가변장치
GB2327482A (en) * 1997-06-09 1999-01-27 Torrington Co Composite camshaft with internal variable cam timing mechanism
US6202611B1 (en) * 1999-12-23 2001-03-20 Daimlerchrysler Corporation Camshaft drive device for an internal combustion engine
US7140335B2 (en) * 2004-09-17 2006-11-28 Kaymor, Llc Dynamic valve timing adjustment mechanism for internal combustion engines
DE102007023617B4 (de) * 2007-05-18 2020-06-04 Herbert Naumann Nockenwellenversteller
GB2457228A (en) * 2008-02-05 2009-08-12 Mechadyne Plc Lubricating oil feed arrangement for a single cam phaser (SCP) camshaft
IT1391257B1 (it) * 2008-10-16 2011-12-01 Piaggio & C Spa Dispositivo elettroidraulico per la variazione della fase e dell'alzata delle valvole in un motore a combustione interna
JP5312153B2 (ja) * 2009-03-31 2013-10-09 本田技研工業株式会社 エンジンの可変動弁装置
US11352913B2 (en) * 2017-12-20 2022-06-07 Guangzhou Automobile Group Co., Ltd. Variable valve lift device and automobile

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Publication number Priority date Publication date Assignee Title
FR1201546A (fr) * 1957-04-17 1959-12-30 Daimler Benz Ag Dispositif pour le réglage du début de l'injection pour moteurs à combustion interne à injection réversibles
US4388897A (en) * 1980-09-22 1983-06-21 Bernard Rosa Variable camshaft assembly
US4747375A (en) * 1982-08-31 1988-05-31 Williams John K Device for controlling the phased displacement of rotating shafts
DE3320835A1 (de) * 1983-06-09 1984-12-13 Dieter 7460 Balingen Fuoß Multipositionsantrieb
JPS60159320A (ja) * 1984-01-27 1985-08-20 Mazda Motor Corp デイ−ゼルエンジンの排気弁制御装置
DE3534412C2 (de) * 1984-10-02 1996-08-29 Hermann Dr Ing Danckert Einrichtung zur belastungs- und drehzahlabhängigen Verstellung der Steuerzeiten eines Gaswechselventils einer Brennkraftmaschine
US4771742A (en) * 1986-02-19 1988-09-20 Clemson University Method for continuous camlobe phasing
DE3616234A1 (de) * 1986-05-14 1987-11-19 Bayerische Motoren Werke Ag Vorrichtung zur relativen drehlagenaenderung zweier in antriebsverbindung stehender wellen, insbesondere zwischen in einem maschinengehaeuse einer brennkraftmaschine gelagerten kurbelwelle und nockenwelle
DE3624827A1 (de) * 1986-07-23 1988-02-04 Sueddeutsche Kolbenbolzenfabri Verstelleinrichtung fuer eine nockenwelle zum steuern der gasein- und auslassventile von verbrennungsmotoren
US4754659A (en) * 1986-11-06 1988-07-05 Ford Motor Company Quill shaft input cluster gear for manual transmission
US4862843A (en) * 1987-06-23 1989-09-05 Honda Giken Kogyo Kabushiki Kaisha Valve timing control device for use in internal combustion engine
JPS6434012A (en) * 1987-07-30 1989-02-03 Seiko Epson Corp Oscillation circuit
DE3918361A1 (de) * 1988-07-15 1990-01-18 Audi Ag Antriebsvorrichtung fuer eine nockenwelle einer brennkraftmaschine
US5033323A (en) * 1989-02-24 1991-07-23 Eaton Corporation Gear rattle damper for countershaft transmissions
FR2644543A1 (fr) * 1989-03-17 1990-09-21 Renault
US4976229A (en) * 1990-02-12 1990-12-11 Siemens Automotive L.P. Engine camshaft phasing

Also Published As

Publication number Publication date
DE59001730D1 (de) 1993-07-15
EP0500622A1 (fr) 1992-09-02
US5211141A (en) 1993-05-18
WO1991007574A1 (fr) 1991-05-30
DE3937628A1 (de) 1991-05-16

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