EP1503048B1 - Mécanisme de commande de soupapes pour moteur à combustion interne - Google Patents

Mécanisme de commande de soupapes pour moteur à combustion interne Download PDF

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Publication number
EP1503048B1
EP1503048B1 EP04010397A EP04010397A EP1503048B1 EP 1503048 B1 EP1503048 B1 EP 1503048B1 EP 04010397 A EP04010397 A EP 04010397A EP 04010397 A EP04010397 A EP 04010397A EP 1503048 B1 EP1503048 B1 EP 1503048B1
Authority
EP
European Patent Office
Prior art keywords
cam
section
valve drive
drive according
sliding
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
EP04010397A
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German (de)
English (en)
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EP1503048A1 (fr
Inventor
Willi Schultz
Frank Ickinger
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche 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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP1503048A1 publication Critical patent/EP1503048A1/fr
Application granted granted Critical
Publication of EP1503048B1 publication Critical patent/EP1503048B1/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
    • F01L1/02—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
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
    • 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
    • F01L2305/00—Valve arrangements comprising rollers

Definitions

  • the invention relates to a valve drive for an internal combustion engine according to the preamble of patent claim 1.
  • a well-known valve train, EP 0 798 451 B1 for an internal combustion engine comprises a camshaft with a sliding cam device.
  • the sleeve-like arranged on the camshaft sliding cam device is provided with spaced lifting curves and adjacent cam tracks with different cam shapes.
  • the lifting curves work together to adjust the sliding cam device with control pins having actuators and each have both an inlet as well as an outlet area.
  • This valvetrain offers significant potentials to realize with relatively simple means a highly effective variable valve timing for an internal combustion engine, with the aim of improving the latter in terms of performance and consumption.
  • valve train 2 with inlet valves 3 and 4 and exhaust valves 4 and 5 - four-valve technology - is shown, which are each arranged above a combustion chamber of a cylinder, the latter are not shown.
  • the camshaft 6 and the intake valves 3 and 4 cooperate in the manner of a variable valve timing.
  • the camshaft 6 is provided with a sleeve-like disc cam device 10, which is axially movable - in the direction AA - is mounted on the camshaft 6, but rotatably connected to the latter, wherein the camshaft 6 and the Sliding cam device 10 cooperate with the interposition of a positive hub connection 11, which is a Drivenutprofil or a serrated profile in the embodiment - Fig. 3 -.
  • the sliding cam device 10 has three cam tracks 12, 13 and 14 with different cam shapes NI, Nil and NIII, which are combined to form a cam block 15 next to each other, the cam block 15 is bounded on both sides of Hubkurven 16 and 17.
  • control pins 18, 19, 20 and 21 having actuators 22,23,24 and 25 are provided, which are, for example.
  • Electromagnetic or hydraulic genus which is arranged radially to the sliding cam device 10.
  • the control pins 18, 19, 20 or 21 in engagement with the example as U-shaped recesses 26 and 27 Fig. 2 - formed lifting curves 16 and 17.
  • the lift curves 16 and 17 of the cam tracks 12, 13 and 14 carrying sliding cam means 10 have for the engaged control pins 18,19, 20 and 21 different Hubkurvensetechnischen HKS on.
  • the lift cam sections Hks of the lift curves 16 and 17 are displayed in accordance with the outer peripheries of the shift cam device 10 reproducing figures Fig. 4 and 5 formed by an inlet section 28, a first centering section 29, an adjustment section 30 and a second centering section 31, to which an extension section 32 connects.
  • a portion of the recesses 26 and 27 for the control pins 18,19,19 and 21 between the beginning of the inlet section 28 and the end of the second centering 31 is designated AfdS, Fig. 5 -.
  • the inlet section 28 tapers in the direction of the first centering section 29 in the manner of a funnel 33.
  • the funnel 33 is preceded by a first adjusting section 34.
  • the second centering section 31 is followed by a locking section 35 and a second adjusting section 36.
  • a locking device 37 - Fig. 2 - which on an inner circumferential surface 38 of the sliding cam device 10 has three radial circumferential Grooves 39, 40 and 41, wherein the camshaft 6 is provided in the region of the grooves 39, 40 and 41 with a cylindrical recess 42 for a detent ball 43 and a coil spring 44.
  • ring elements 46 and 47 are provided, which protrude beyond the cam block 15.
  • the lifting curves 16 and 17 are arranged.
  • radial webs 48 and 49 of the ring elements 46 and 47 delimit the cam tracks 12, 13 and 14 of the cam block 15.
  • the ring elements 46 and 47 and the cam hub 45 are made in one piece.
  • the roller cam followers 9 and thus also the inlet valves 3 and 4 actuate.
  • the variable valve timing is operated.
  • the actuating elements 22, 23, 24 or 25 are activated and one of the control pins 18, 19, 20 or 21 brought into engagement with the recesses 26 or 27, which due to the Verstellsetation 30 to an axial movement of the sliding cam device 10 in the direction AA and thus to a defined circuit of one of the cam tracks 12,13 or 14 leads.

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

Claims (8)

  1. Mécanisme de commande de soupapes pour un moteur à combustion interne, comprenant un arbre à cames avec un dispositif à cames coulissantes (10), qui possède des pistes de cames adjacentes avec des formes de cames et des courbes de levée (16, 17) différentes, ces courbes de levée coopérant avec des éléments d'actionnement (22, 23, 24 et 25) présentant des goupilles de commande (18, 19, 20 et 21), pour le déplacement du dispositif à cames coulissantes (10), au moins une courbe de levée (16 ou 17) du dispositif à cames coulissantes (10) portant les pistes de cames (12, 13 et 14) étant pourvue de différentes sections de courbes de levée (Hks) pour la goupille de commande en prise (18, 19, 20 et 21) de l'élément d'actionnement associé (22, 23, 24 et 25), une section de déplacement (30) suivant une section d'entrée (28), caractérisé en ce que
    - l'on prévoit entre la section d'entrée (28) et la section de déplacement (30) une première section de centrage (29), et
    - après la section de déplacement (30), une deuxième section de centrage (31).
  2. Mécanisme de commande de soupapes selon la revendication 1, caractérisé en ce qu'une section de sortie (32) se raccorde à la deuxième section de centrage (31).
  3. Mécanisme de commande de soupapes selon la revendication 1, caractérisé en ce que la section d'entrée (28) se rétrécit en forme d'entonnoir (33) dans la direction de la première section de centrage (29).
  4. Mécanisme de commande de soupapes selon la revendication 1, caractérisé en ce que le dispositif à cames coulissantes (10) est pourvu, de part et d'autre d'un bloc de cames (15) portant les pistes de cames (12, 13 et 14) d'un moyeu de came (45), d'éléments annulaires (46 et 47) réalisés sous forme de corps creux, qui font saillie hors du bloc de cames (15).
  5. Mécanisme de commande de soupapes selon la revendication 4, caractérisé en ce que les éléments annulaires (46 et 47) sont pourvus des courbes de levée (16 et 17).
  6. Mécanisme de commande de soupapes selon la revendication 4, caractérisé en ce que des nervures radiales (48 et 49) des éléments annulaires (46 et 47) limitent les pistes de cames (12, 13 et 14) du bloc de cames (15).
  7. Mécanisme de commande de soupapes selon l'une quelconque des revendications 4 à 6, caractérisé en ce que les éléments annulaires (46 et 47) et le moyeu de came (45) sont réalisés d'une seule pièce.
  8. Mécanisme de commande de soupapes selon l'une quelconque des revendications 4 à 6, caractérisé en ce que les éléments annulaires (46 et 47) et le moyeu de came (45) sont constitués de plusieurs pièces.
EP04010397A 2003-07-19 2004-05-03 Mécanisme de commande de soupapes pour moteur à combustion interne Expired - Lifetime EP1503048B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10332927 2003-07-19
DE10332927 2003-07-19

Publications (2)

Publication Number Publication Date
EP1503048A1 EP1503048A1 (fr) 2005-02-02
EP1503048B1 true EP1503048B1 (fr) 2008-10-08

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EP04010397A Expired - Lifetime EP1503048B1 (fr) 2003-07-19 2004-05-03 Mécanisme de commande de soupapes pour moteur à combustion interne

Country Status (4)

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US (1) US20050011480A1 (fr)
EP (1) EP1503048B1 (fr)
JP (1) JP4088276B2 (fr)
DE (1) DE502004008185D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011026562A1 (fr) 2009-09-02 2011-03-10 Thyssenkrupp Presta Teccenter Ag Mécanisme de distribution pour soupapes d'échange de gaz d'un moteur à combustion interne comportant des ensembles came axialement déplaçables

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011026562A1 (fr) 2009-09-02 2011-03-10 Thyssenkrupp Presta Teccenter Ag Mécanisme de distribution pour soupapes d'échange de gaz d'un moteur à combustion interne comportant des ensembles came axialement déplaçables
DE102009039733A1 (de) 2009-09-02 2011-03-10 Thyssenkrupp Presta Teccenter Ag Ventiltrieb für Gaswechselventile einer Brennkraftmaschine mit axial verschiebbaren Nockeneinheiten

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Publication number Publication date
EP1503048A1 (fr) 2005-02-02
DE502004008185D1 (de) 2008-11-20
US20050011480A1 (en) 2005-01-20
JP4088276B2 (ja) 2008-05-21
JP2005042717A (ja) 2005-02-17

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