EP1096112B1 - Dispositif pour modifier le calage de soupapes d'un moteur a combustion interne, notamment un déphaseur avec des éléments de transmissions rotationnels - Google Patents

Dispositif pour modifier le calage de soupapes d'un moteur a combustion interne, notamment un déphaseur avec des éléments de transmissions rotationnels Download PDF

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Publication number
EP1096112B1
EP1096112B1 EP00121419A EP00121419A EP1096112B1 EP 1096112 B1 EP1096112 B1 EP 1096112B1 EP 00121419 A EP00121419 A EP 00121419A EP 00121419 A EP00121419 A EP 00121419A EP 1096112 B1 EP1096112 B1 EP 1096112B1
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EP
European Patent Office
Prior art keywords
drive wheel
camshaft
side wall
facing
faces
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
EP00121419A
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German (de)
English (en)
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EP1096112A1 (fr
Inventor
Jochen Auchter
Andreas Strauss
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IHO Holding GmbH and Co KG
Original Assignee
INA Schaeffler KG
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Publication date
Application filed by INA Schaeffler KG filed Critical INA Schaeffler KG
Publication of EP1096112A1 publication Critical patent/EP1096112A1/fr
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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
    • F01L1/3442—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 hydraulic chambers with variable volume to transmit the rotating force
    • 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
    • F01L1/3442—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 hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • F01L2001/34479—Sealing of phaser devices

Definitions

  • the invention relates to a device for changing the timing of Gas exchange valves of an internal combustion engine according to the generic term Features of claim 1, and it is particularly advantageous in hydraulic Camshaft adjustment devices can be implemented in a rotary piston design.
  • a disadvantage of these known devices is that they are in particular due to the massive design of the peripheral wall and the side walls the drive wheel as individual steel parts or as fittings made of sintered metal have a relatively high weight and a larger axial Require installation space in or on the cylinder head of the internal combustion engine and at the same time increase the manufacturing and assembly costs of such devices.
  • a connection of the individual elements of the drive wheel with each other Screwing also has the disadvantage that the necessary screw holes additional leakage points, especially in the side walls the device can arise, which may be additionally sealed have to.
  • the invention is therefore based on the object of a device for changing the control times of gas exchange valves of an internal combustion engine, in particular hydraulic camshaft adjusting devices of the rotary piston type, to conceive, which is characterized by a reduced weight and low space requirement, as well as cost-effective production and Installation is characterized and by a simple construction internal and external fluid leakage reduced to a minimum.
  • the toothing of the drive wheel is preferred as a toothed belt ring gear formed, which also several on its inner diameter side has radial mounting flanges on the connecting flange of the peripheral wall of the drive wheel lie flat.
  • the camshaft facing Axial surfaces of the boundary walls and the peripheral wall the drive wheel form the adhesive surfaces for the camshaft facing Side wall. It is for further weight reduction of the device
  • the volume of the boundary walls is advantageous of the drive wheel by parallel to the longitudinal central axis of the device Through holes or, in the case of a drive wheel made of sintered metal, to reduce through sintered breakthroughs. The around the area of this Through holes or breakthroughs reduced adhesive surface for the camshaft facing Sidewall is still sufficient for one durable connection with the drive wheel.
  • O-ring also seals in this embodiment, the side facing the camshaft the drive wheel against fluid leakage.
  • the separate connection the side facing the camshaft on the drive wheel in one fourth embodiment can nevertheless be realized in the form that this by welding to steel spring sleeves additionally arranged in the drive wheel is attached to the drive wheel.
  • the boundary walls of the drive wheel each parallel to the longitudinal central axis of the device graded breakthroughs in which the preferred hat-shaped spring sleeves are inserted such that they support with its head-sided edge on the steps of the openings and on the foot side, the openings are flush with the axial sides facing the camshaft close the boundary walls.
  • the spring sleeves are preferred hollow and made of a resilient steel to connect the camshaft facing Design side wall on the drive wheel without play.
  • the spring force the spring sleeves must then be higher than the one facing the camshaft Side wall acting axial force by the pressure of the hydraulic Pressure medium in the device.
  • the most suitable welding machine drive to attach the side wall facing the camshaft to the spring sleeves has laser welding with one welding spot each Proven spring sleeve, but other welding methods, such as capacitor discharge or friction welding, applicable and / or more than one Welding point per spring sleeve are possible.
  • this Embodiment advantageous, between the camshaft-facing side wall and the drive wheel in the same manner as in the first embodiment Arrange the arranged O-ring for improved sealing.
  • a fifth embodiment Another option for the separate connection of the camshaft facing Side wall on the drive wheel for a device in which the peripheral wall of the drive wheel or the side wall facing the camshaft consists of a material that is difficult or difficult to weld proposed by a fifth embodiment.
  • the boundary walls of the drive wheel also each parallel to Stepped openings running in the longitudinal center axis of the device, in which countersunk rivets are used at the head of the openings become.
  • the side wall facing the camshaft points each arranged at the level of the openings in the boundary walls axial countersunk holes so that they go through the bottom as well as to their outside flat riveting of those extending into the counterbore Countersunk rivets can be attached to the drive wheel.
  • One in the same way as with The O-ring arranged in the first embodiment also seals in this embodiment the side wall facing the camshaft opposite the drive wheel against fluid leakage.
  • a separate connection of the side wall facing the camshaft proposed on the drive wheel the reduction in diameter the outside of the peripheral wall of the drive wheel and the resulting Form paragraph a little larger and the camshaft facing Side wall by flanging the end area of its angled edge section to attach the heel of the peripheral wall to the drive wheel.
  • the necessary Sealing of the side wall facing the camshaft the drive wheel against fluid leakage can again by a in done in the same way as in the first embodiment arranged O-ring.
  • a variant this is done by grading the through holes or breakthroughs in the Incorporate boundary walls and into them, similar to the fourth Embodiment trained to use hat-shaped spring sleeves, the with approximately the material thickness of the side wall facing the camshaft corresponding length from the through holes or openings extend out.
  • In the side wall of the drive wheel facing the camshaft are each at the level of the through holes or openings arranged axial bores incorporated, which is a slightly smaller Have diameter than the outer diameter of the spring sleeves.
  • the inventive device for changing the timing of gas exchange valves of an internal combustion engine, especially hydraulic ones Rotary piston type camshaft adjusting device thus has compared to the camshaft adjusting devices known from the prior art the advantage of being able to train through the camshaft Side wall as a thin-walled blank molding both a reducing weight and a smaller space requirement. Furthermore, the device according to the invention has the design of the side wall facing the camshaft as a deep-drawn sheet steel part simplified constructive structure, which ultimately also makes it cost-effective Manufacturing the device is possible. Likewise, the assembly costs the device according to the invention through the different possibilities the separate connection of the side wall facing the camshaft be lowered.
  • the drive wheel 4 from a hollow cylindrical Circumferential wall 7 and a side wall facing away from the camshaft 8 and a camshaft facing side wall 9, which together are connected and together form a cavity 10 in the drive wheel 4.
  • this cavity 10 by five from the inside of the peripheral wall 7th outgoing boundary walls directed radially to the longitudinal central axis of the device 1 11 five hydraulic working rooms 12 formed.
  • the impeller 5 on the other hand points to the handling of his wheel hub 13 five in axial grooves in the Wheel hub 13 held wing 14, which radially in the working spaces 12 of the Drive wheel 4 extend and each in two hydraulic pressure chambers 15, 16 divide.
  • the side wall facing away from the camshaft 8, the peripheral wall 7 and the toothed belt ring gear Gearing 6 of the drive wheel 4 by means of common fastenings with one another are connected by the peripheral wall 7 of the drive wheel 4 on its outside according to the invention has a circumferential connecting flange 19, at the the side facing away from the camshaft, the side wall 8 facing away from the camshaft and on the side facing the camshaft, the toothing 6 of the drive wheel 4 is fixed by common screws 21.
  • the side facing away from the camshaft Side wall 8 has the same diameter as the connecting flange 19 on the peripheral wall 7 and lies on this and on the camshaft facing away Axial sides 23 of the boundary walls 11 of the drive wheel 4 plan on.
  • the separate Connection 18 of the side wall 9 facing the camshaft to the drive wheel 4 is in the first embodiment shown in Figure 2 by punctiform Laser welding directly on the axial sides 27 of the boundary walls facing the camshaft 11 of the drive wheel 4 realized.
  • the camshaft-facing side wall 9 is this by gluing to the camshaft facing axial sides 27, 28 of the boundary walls 11 and Peripheral wall 7 attached to the drive wheel 4.
  • device 1 becomes the volume of the boundary walls 11 of the drive wheel 4 by means of parallel to the longitudinal central axis of the device 1 extending through holes 37 reduced. Sealing the camshaft facing side wall 9 to the drive wheel 4 against fluid leakage takes place in the same way as in the first embodiment by a O-ring 38.
  • FIG. 4 A third embodiment of the separate connection 18 facing the camshaft Side wall 9 on the drive wheel 4 is shown in Figure 4.
  • this embodiment is in the camshaft-facing axial side 28 of the peripheral wall 7 a circumferential annular groove 29 is incorporated into which an annular solder molded part is inserted becomes.
  • This solder molding is made by heating the peripheral wall 7 and plugged camshaft facing side wall 9 liquefied so far that the side wall 9 facing the camshaft by sealing soldering to the drive wheel 4 is attached.
  • the through holes machined in the boundary walls 11 37 also serve to further reduce the weight of the device 1.
  • a separate seal between the camshaft facing Side wall 9 and the drive wheel 4 can be omitted in this embodiment.
  • the fourth embodiment of the separate connection 18 shown in FIG Side wall 9 facing the camshaft on the drive wheel 4 is particularly suitable for a device 1, the peripheral wall 7 of a difficult or not weldable material and the camshaft-facing side wall 9 should still be attached to the drive wheel 4 by welding.
  • the boundary walls 11 of the drive wheel 4 parallel to the longitudinal central axis graded openings 30 running through the device 1 are incorporated, in which hat-shaped steel spring sleeves 31 in the indicated in the drawing Be used.
  • the side wall 9 facing the camshaft can thus with the help of these spring sleeves 31 also by laser welding be attached to the drive wheel 4.
  • For sealing the camshaft facing Side wall 9 opposite the drive wheel 4 is also in this embodiment arranged between them in the same manner as in the first embodiment O-ring inserted.
  • the camshaft facing side wall 9 on the drive wheel 4 are in the boundary walls 11 of the drive wheel 4 also parallel to the longitudinal central axis of the Device 1 extending graduated openings 32 incorporated into which In this embodiment, however, it rests against the steps of the openings 32 on the head side Countersunk rivets 33 are used.
  • the side wall facing the camshaft 9 in each case points at the level of the openings 32, not in more detail designated axial counterbores, so that they can be riveted in these countersunk rivets 33 extending into the drive wheel 4 are fastened therein can be.
  • O-ring 38 also seals the camshaft facing in this embodiment Side wall 9 to the drive wheel 4.
  • the embodiment of the separate connection 18 shown in FIG Sidewall 9 facing the camshaft on the drive wheel 4 represents an alternative to the aforementioned embodiment.
  • the Reduction in diameter of the outside of the peripheral wall 7 and thereby emerging circumferential paragraph 36 formed somewhat larger to the camshaft facing Sidewall 9 by crimping the angled end portion Edge section 17 around this shoulder 36 of the peripheral wall 7 on the drive wheel 4 to be able to attach.
  • For sealing the side wall facing the camshaft 9 to the drive wheel 4 is again between them in the same way as in the first embodiment arranged O-ring 38 inserted, while the in the Boundary walls 11 incorporated through holes 37 also the Reduce the weight of the device 1.
  • connection 18 of the side wall 9 facing the camshaft on the drive wheel 4 in the boundary walls 11 of the drive wheel 4 each parallel to Through bores 37 machined in the longitudinal center axis of the device 1 not just the weight reduction of the device 1.
  • These through holes 37 are simultaneously used to attach the side wall facing the camshaft 9 used on the drive wheel 4 in such a way that this is punctiform Get through their outside into these through holes 37 without other fasteners jammed on the drive wheel.
  • O-ring 38 arranged in the first embodiment also seals in this Embodiment, the camshaft-facing side wall 9 to the drive wheel 4th from.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (11)

  1. Dispositif pour la variation du calage des soupapes d'un moteur à combustion interne, en particulier un positionneur hydraulique d'arbre à cames du type à piston rotatif, présentant les caractéristiques suivantes :
    le dispositif (1) est disposé à l'extrémité, côté entraínement, d'un arbre à cames (3) reposant dans la culasse (2) du moteur à combustion interne et se compose, pour l'essentiel, d'un pignon d'entraínement (4) constitué en tant que rotor extérieur et d'une roue à ailettes (5) conçue en tant que rotor intérieur ;
    le pignon d'entraínement (4) se trouve en liaison d'entraínement avec un vilebrequin du moteur à combustion interne via une denture périphérique (6) et la roue à ailette (5) est reliée, de manière solidaire en rotation, avec l'arbre à cames (3) du moteur à combustion interne ;
    le pignon d'entraínement (4) se compose en plus d'une paroi périphérique (7) en forme de cylindre creux, d'une paroi latérale (8) tournée vers l'arbre à cames et d'une paroi latérale (9) opposée à l'arbre à cames, qui sont reliées ensemble et qui forment ensemble une cavité (10) ;
    dans la cavité (10) du pignon d'entraínement (4), au moins une chambre de travail hydraulique (12) est formée par au moins deux parois de séparation (11) orientées radialement par rapport à l'axe longitudinal central du dispositif (1) et débordant du côté intérieur de la paroi périphérique (7) ;
    la roue à ailettes (5) présente sur la périphérie de son moyeu (13) au moins une ailette (14), qui s'étend radialement dans une chambre de travail (12) du pignon d'entraínement, celle-ci se décomposant en deux chambres de pression hydrauliques (15, 16) ;
    en cas de mise sous pression facultative ou simultanée des chambres de pression (15, 16) à l'aide d'un fluide hydraulique, il se produit un mouvement de pivotement ou un blocage de la roue à ailettes (5) par rapport au pignon d'entraínement (4) et donc de l'arbre à cames (3) par rapport au vilebrequin ;
    caractérisé en ce que
    la paroi latérale (9) du pignon d'entraínement (4) opposée à l'arbre à cames est conçue en tant que pièce de forme ronde à paroi mince afin de réduire le poids et l'encombrement ;
    lequel dispositif présente un bord (17) entourant au moins partiellement la paroi périphérique (7) du pignon d'entraínement (4) et au moins recourbé selon un angle quasiment droit ;
    où la paroi latérale (8) tournée vers l'arbre à cames, la paroi périphérique (7) et la denture (6) du pignon d'entraínement (4) sont reliées les unes aux autres par des fixations communes
    et la paroi latérale (9) opposée à l'arbre à cames est fixée de manière non démontable au pignon d'entraínement (4) par une jonction (18) séparée augmentant sa rigidité axiale.
  2. Dispositif selon la revendication 1, caractérisé en ce que la paroi périphérique (7) du pignon d'entraínement (4) présente, sur sa face extérieure, un flasque de raccordement (19) de plus grand diamètre et de préférence enveloppant, sur lequel sont fixés par des vis communes (21), à l'arrière, la paroi latérale (8) tournée vers l'arbre à cames et présentant le même diamètre et, à l'avant, la denture (6) du pignon d'entraínement (4) conçue en tant que roue annulaire pour courroie crantée avec plusieurs flasques de fixation radiaux (20).
  3. Dispositif selon la revendication 1, caractérisé en ce que la paroi latérale (9) du pignon d'entraínement (4) opposée à l'arbre à cames se compose, de préférence, d'une tôle en acier emboutie, laquelle est réalisée de manière adéquate pour un dispositif entraíné par courroie (1) grâce à un passage circulaire (24) pour l'arbre à cames (3), dont le bord (25) est replié vers la culasse (2) et est conçu en tant que surface de roulement pour une bague d'étanchéité Simmer (26).
  4. Dispositif selon la revendication 1, caractérisé en ce que la paroi latérale (9) du pignon d'entraínement (4) tournée vers l'arbre à cames est fixée de préférence par soudure par points au laser directement sur les faces axiales (27) des parois de séparation (11) du pignon d'entraínement (4) et opposées de l'arbre à cames.
  5. Dispositif selon la revendication 1, caractérisé en ce que la paroi latérale (9) du pignon d'entraínement (4) opposée à l'arbre à cames est fixée de préférence par collage sur les faces axiales (27, 28) des parois de séparation (11) opposées à l'arbre à cames et à la paroi périphérique (7) du pignon d'entraínement (4).
  6. Dispositif selon la revendication 1, caractérisé en ce que la face axiale (28) de la paroi périphérique (7) du pignon d'entraínement (4) et opposée à l'arbre à cames présente, de préférence, une gorge annulaire périphérique (29) dans laquelle un métal d'apport en forme d'anneau est disposé, lequel métal est fixé par brasure étanche sur le pignon d'entraínement (4) par échauffement de la paroi latérale (9) du pignon d'entraínement (4) opposée à l'arbre à cames.
  7. Dispositif selon la revendication 1, caractérisé en ce que les parois de séparation (11) du pignon d'entraínement (4) présentent chacune des passages (30) à gradin qui s'étendent parallèlement à l'axe central longitudinal du dispositif (1) et en ce que la paroi latérale (9) du pignon d'entraínement (4) opposée à l'arbre à cames est fixée au pignon d'entraínement (4), de préférence, par soudure sur les douilles élastiques (31) se trouvant à l'avant des gradins des passages (30).
  8. Dispositif selon la revendication 1, caractérisé en ce que les parois de séparation (11) du pignon d'entraínement (4) présentent chacune des passages (32) à gradin qui s'étendent parallèlement à l'axe central longitudinal du dispositif (1) et en ce que la paroi latérale (9) du pignon d'entraínement (4) opposée à l'arbre à cames est fixée au pignon d'entraínement (4), de préférence, par rivetage au moyen de rivets à tête noyée (33) se trouvant à l'avant des gradins des passages (32).
  9. Dispositif selon la revendication 1, caractérisé en ce que la face extérieure de la paroi périphérique (7) du pignon d'entraínement (4) présente un épaulement (34) s'étendant sur la périphérie et formé par une faible réduction du diamètre et en ce que la paroi latérale (9) du pignon d'entraínement (4) opposée à l'arbre à cames est fixée au pignon d'entraínement (4) au moyen d'un ergot périphérique (35) disposé sur la face intérieure de l'extrémité de son bord recourbé (17) par clipsage sur l'épaulement (34) de la paroi périphérique (7).
  10. Dispositif selon la revendication 1, caractérisé en ce que la face extérieure de la paroi périphérique (7) du pignon d'entraínement (4) présente un épaulement périphérique (36) formé par une faible réduction du diamètre et en ce que la paroi latérale (9) du pignon d'entraínement (4) opposée à l'arbre à cames est fixée au pignon d'entraínement (4) par bordage de l'extrémité de son bord recourbé (17) autour de l'épaulement (36) de la paroi périphérique (7).
  11. Dispositif selon la revendication 1, caractérisé en ce que des perçages traversants (37) s'étendant chacun parallèlement à l'axe central longitudinal du dispositif (1) sont usinés dans les parois de séparation (11) du pignon d'entraínement (4) et en ce que la paroi latérale (9) du pignon d'entraínement (4) opposée à l'arbre à cames est fixée au pignon d'entraínement (4), de préférence, par enfoncement en forme de points de sa face extérieure dans ces perçages traversants (37).
EP00121419A 1999-10-26 2000-09-29 Dispositif pour modifier le calage de soupapes d'un moteur a combustion interne, notamment un déphaseur avec des éléments de transmissions rotationnels Expired - Lifetime EP1096112B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19951391 1999-10-26
DE19951391A DE19951391A1 (de) 1999-10-26 1999-10-26 Vorrichtung zum Verändern der Steuerzeiten von Gaswechselventilen einer Brennkraftmaschine, insbesondere hydraulische Nockenwellen-Verstelleinrichtung in Rotationsrichtung

Publications (2)

Publication Number Publication Date
EP1096112A1 EP1096112A1 (fr) 2001-05-02
EP1096112B1 true EP1096112B1 (fr) 2004-09-15

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Country Link
US (1) US6418893B1 (fr)
EP (1) EP1096112B1 (fr)
JP (1) JP2001173415A (fr)
AT (1) ATE276432T1 (fr)
DE (2) DE19951391A1 (fr)

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ATE276432T1 (de) 2004-10-15
EP1096112A1 (fr) 2001-05-02
DE50007756D1 (de) 2004-10-21
JP2001173415A (ja) 2001-06-26
US6418893B1 (en) 2002-07-16

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