EP3365537B1 - Bague coulissante pour selection de came de commande de soupape - Google Patents

Bague coulissante pour selection de came de commande de soupape Download PDF

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Publication number
EP3365537B1
EP3365537B1 EP16785341.5A EP16785341A EP3365537B1 EP 3365537 B1 EP3365537 B1 EP 3365537B1 EP 16785341 A EP16785341 A EP 16785341A EP 3365537 B1 EP3365537 B1 EP 3365537B1
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EP
European Patent Office
Prior art keywords
guide section
cam
cam piece
slotted guide
grooves
Prior art date
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Active
Application number
EP16785341.5A
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German (de)
English (en)
Other versions
EP3365537A1 (fr
Inventor
Arne Manteufel
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.)
Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Publication of EP3365537A1 publication Critical patent/EP3365537A1/fr
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    • 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

Definitions

  • the invention relates to a gate section for a cam piece of a valve drive, comprising a cylindrical body, on whose outer circumference two thread-like sliding grooves are configured, each serving to enclose at least one actuator pin of the cam piece associated Stellaktuators for corresponding axial displacement of the cam piece to a fundamental wave, said Move sliding in opposite directions to each other and are brought together in a common outlet area. Furthermore, the invention relates to a valve train for an internal combustion engine, in which an aforementioned gate section is used
  • a gate section for a cam piece of a valve train in which the cam piece rotatably and axially slidably disposed on a basic shaft and is designed accordingly as a sliding cam valve drive
  • the gate section of the cam piece comprises an integral, cylindrical body, formed on the outer circumference of two thread-like sliding grooves are.
  • the displacement grooves are each provided for representing a corresponding axial displacement of the cam piece to the fundamental shaft by the cam piece is associated with a Stellaktuator whose actuator pin in a respective current position of the cam piece on the fundamental wave in one of the sliding grooves and later in a displacement of the cam piece into another position on the fundamental wave.
  • the sliding grooves are opposite to each other and cause accordingly in interaction with the actuator pin also oppositely oriented displacements of the cam piece to the fundamental, wherein the displacement grooves are brought together in a common outlet area.
  • the displacement grooves extend from their groove depth back to an outer diameter of the body, so that the actuator pin is pushed out of the respective displacement groove at the end of the displacement of the cam piece on the fundamental shaft.
  • EP 2884062 A1 is a device for adjusting the camshaft of an internal combustion engine with a camshaft with at least one rotatably mounted thereon cam piece and a Axialkulisse with two slide tracks known.
  • a gate section comprises a cylindrical body, on the outer circumference of which two thread-like sliding grooves are designed, each of which serves to enclose at least one actuator stub of a cam actuator associated actuating actuator for corresponding axial displacement of the cam piece to a fundamental wave.
  • the displacement grooves run in opposite directions to each other and are brought together in a common outlet area.
  • a gate section according to the invention is then part of at least one cam piece within a valve train of an internal combustion engine, which is guided in a rotationally fixed and axially displaceable manner on a basic shaft and comprises at least one cam section in addition to the gate section.
  • the cam piece is preferably provided at a through hole with an inner profile, with which it is placed on a corresponding outer profile of the fundamental wave.
  • the two profiles are designed as corresponding driving profiles, such as splines.
  • the thread segments at the gate section running, ie helically shaped sliding grooves serve to enclose at least one actuator pin of the cam piece associated Stellaktuators for targeted axial displacement of the cam piece to the fundamental,
  • the valve train is therefore designed in principle in the manner of a sliding cam valve drive in which at least one cam piece is rotatably and axially slidably placed on a fundamental shaft to perform in different axial positions a respective AnSteutation at least one associated Gas batventifs each with a plurality of differently shaped individual cams, these individual cams are provided axially juxtaposed on the at least one cam portion of the cam piece.
  • one of the individual cams is axially brought into overlap with a transmission element assigned to the cam portion, on which the individual cam starts and operates according to its respective cam lobe.
  • the respective transmission element converts the cam contour of the single cam in the following into corresponding opening and closing movements of the at least one gas exchange valve.
  • a transmission element may be a lever-type cam follower, such as a towing or rocker arm, or else a bucket tappet.
  • the common outlet region of the displacement grooves has a constant groove depth.
  • the common outlet region of the sliding grooves does not lead back to an outer diameter of the body of the sliding section, but essentially remains at the same groove depth, this groove depth can correspond to a groove depth of the two displacement grooves or even slightly deviate from this.
  • Such a design of a gate section for a cam piece of a valve drive has the advantage that the gate section can be finished with low production costs, since the common outlet region of the two displacement grooves does not have to be made with variable groove depth to leak to the outer diameter of the body of the gate section to realize. Because an outlet area with variable groove depth must usually be produced in the context of a milling process, which is elaborate, in contrast, a discharge area with a constant groove depth can also be produced with other, simpler manufacturing processes.
  • the common outlet region of the two displacement grooves is designed with a variable groove depth, in that the outlet region realizes a transition from another groove depth of the displacement grooves to an outer diameter of the cylindrical body of the slide portion. This changing in the circumferential direction depth of the outlet area must be made consuming, which increases the production cost accordingly.
  • each individual part can also define parts of the displacement grooves, So for example, each one of the groove walls of the convergent sliding grooves.
  • the sliding grooves are produced as milled grooves by milling the thread-like courses of the sliding grooves can be easily made, the outlet area but then either separately or in the same operation is made with the same depth.
  • the body is designed as a sheet metal forming part.
  • the production cost can be further reduced, wherein the cylindrical body of the link section while a flanged sheet metal cylinder or can also be realized from two mirror-symmetrical drawn parts.
  • a groove wall of the sliding grooves is preferably configured on each of the individual parts, so that the sliding grooves with the common outlet region result in the course of the joining of the two individual parts to the sliding section.
  • the parts can be made from a 2 mm deep-drawn sheet, the deep drawing is then carried out in the form of cups.
  • the two symmetrical components For joining to the gate section, the two symmetrical components must then be aligned with each other, whereby this can be realized by a corresponding profile, such as the provision of an axially projecting tab on the part of a component, which encloses the part of the other component in a corresponding franking.
  • the outlet region is designed as a circumferential recess on the body.
  • a particularly simple production of the outlet region on the body can be realized by producing it as part of a cost-effective rotary operation.
  • this ensures that an actuator pin of the actuating actuator which is not returned to a basic position in a timely manner can not collide with a circumferential end of the outlet area, since the actuator pin can continue to extend beyond a complete revolution of the gate section from running in the outlet area.
  • the displacement grooves have inlet regions which each lead from an outer diameter of the body to a groove depth of the displacement grooves.
  • the displacement grooves are therefore provided with inlet regions which lead from an outer diameter of the body to the respective groove depth of the displacement grooves.
  • FIG. 1 shows a perspective view of a portion of a valve train 1 for an internal combustion engine, wherein the valve train 1 in principle in the manner of a Professional known sliding cam valve drive is designed.
  • a cam piece 2 of the valve drive 1 is shown, which is rotatably within the valve train 1 and axially displaceable on a - not shown here - fundamental wave is arranged.
  • the cam piece 2 is provided on a through hole 3 with an inner profile 4, via which the non-rotatable and axially displaceable coupling is made with the fundamental wave, the fundamental wave is equipped for this purpose with a corresponding thereto designed outer profile.
  • the cam piece 2 consists essentially of two axially spaced apart cam sections 5 and 6, which are composed of two individual cams 7 and 8 or 9 and 10, and a gate section 11.
  • the cam sections 5 and 6 are each with one of their individual cam. 7 or 8 or 9 or 10, each with an associated - not shown here - transmission element in contact, which a respective cam elevation of the respective running single cam 7 or 8 or 9 or 10 in corresponding opening and closing movements of at least one associated GaswechseSveniils the valve gear implements.
  • the gate section 11 is provided with a one-piece, cylindrical body 12, on the outer circumference of two sliding grooves 13 and 14 are configured. This sliding grooves 13 and 14 have a thread-like course and run in opposite directions to each other towards an axial center of the body 12, where they are brought together in a common outlet area 15.
  • each sliding groove 13 and 14 each have an inlet region 16 or 17, via which in each case a transition from an outer diameter of the body 12 to the actual groove depth of the respective displacement groove 13 or 14 is realized, in particular from the further view in FIG. 2 is apparent.
  • the common outlet region 15 of the displacement grooves 13 and 14 is designed with a constant groove depth, this groove depth substantially corresponding to the groove depths of the displacement grooves 13 and 14 following the inlet regions 16 and 17.
  • the outlet region 15 is designed as a circumferential recess on the body 12, which was manufactured as part of a turning operation.
  • the remaining parts of the sliding grooves 13 and 14, however, are made milled, in particular to be able to design the inlet regions 16 and 17 accordingly.
  • the one-piece body 12 of the gate section 11 also exists as a sheet metal forming part, namely as a flanged sheet metal cylinder.
  • the actuating actuator associated with the cam piece 2 is capable of carrying out a return stroke of its actuator pin on its own, since the common outlet region 15 of the displacement grooves 13 and 14 is not provided with a rising flank which otherwise would cause the actuator pin to be pushed back.
  • FIG. 3 a perspective view of a portion of a valve train 18 according to a second embodiment of the invention, wherein also here a cam piece 19 of the valve gear 18 is shown, the valve gear 18 substantially corresponds to the variant of the FIGS. 1 and 2 , wherein, in contrast to the previous variant, a body 20 of a link portion 21 of the cam piece 19 is not configured in one piece, but is composed of two individual parts 22 and 23.
  • the individual parts 22 and 23 are realized as mirror-symmetrical drawn parts, which were manufactured in the context of thermoforming process, in particular cups.
  • Each item 22 and 23 defines a respective groove wall of two displacement grooves 24 and 25, which, as in the variant of the FIGS. 1 and 2 , thread-like and in opposite directions to each other in a common outlet region 26 are merged.

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

Claims (8)

  1. Segment de coulisse (11 ; 21) pour une pièce de came (2 ; 19) d'une commande de soupapes (1 ; 18), comprenant un corps cylindrique (12 ; 20) au niveau de la périphérie extérieure duquel sont réalisées deux rainures de glissement (13, 14 ; 24, 25) s'étendant en hélice, qui servent à chaque fois à recevoir au moins une goupille d'actionneur d'un actionneur de commande associé à la pièce de came (2 ; 19) en vue du coulissement axial correspondant de la pièce de came (2 ; 19) par rapport à un arbre de base, les rainures de glissement (13, 14 ; 24, 25) s'étendant en sens inverse l'une par rapport à l'autre et étant réunies dans une région de sortie commune (15 ; 26), caractérisé en ce que la région de sortie commune (15 ; 26) présente une profondeur de rainure constante.
  2. Segment de coulisse (11) selon la revendication 1, caractérisé en ce que le corps (12) est réalisé d'une seule pièce.
  3. Segment de coulisse (11) selon la revendication 1, caractérisé en ce que les rainures de glissement (13, 14) sont réalisées sous forme de rainures fraisées.
  4. Segment de coulisse (11 ; 21) selon la revendication 1, caractérisé en ce que le corps (12, 20) est réalisé sous forme de pièce façonnée en tôle.
  5. Segment de coulisse (11) selon la revendication 1, caractérisé en ce que la région de sortie (15) est réalisée sous forme d'encoche périphérique au niveau du corps (12).
  6. Segment de coulisse (11 ; 21) selon la revendication 1, caractérisé en ce que les rainures de glissement (13, 14 ; 24, 25) présentent des régions d'entrée (16, 17) qui conduisent à chaque fois d'un diamètre extérieur du corps (12, 20) à une profondeur de rainure des rainures de glissement (13, 14 ; 24, 25).
  7. Commande de soupapes (1 ; 18) pour un moteur à combustion interne, comprenant au moins une pièce de came (2 ; 19) qui est guidée de manière déplaçable axialement et de manière solidaire en rotation sur un arbre de base et qui comprend au moins un segment de came (5, 6) et un segment de coulisse (11 ; 21), le segment de coulisse (11 ; 21) étant réalisé selon l'une quelconque ou plusieurs des revendications 1 à 6.
  8. Commande de soupapes (1 ; 18) selon la revendication 7, caractérisée en ce qu'un actionneur de commande est à chaque fois associé à l'au moins une pièce de came (2 ; 19), au moins une goupille d'actionneur de l'actionneur de commande pouvant être ramenée automatiquement d'une position sortie respective dans une position de base respective.
EP16785341.5A 2015-10-22 2016-09-30 Bague coulissante pour selection de came de commande de soupape Active EP3365537B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015220602.5A DE102015220602A1 (de) 2015-10-22 2015-10-22 Kulissenabschnitt für ein Nockenstück eines Ventiltriebs
PCT/DE2016/200458 WO2017067549A1 (fr) 2015-10-22 2016-09-30 Portion de coulisse pour un jeu de cames d'un train de soupapes

Publications (2)

Publication Number Publication Date
EP3365537A1 EP3365537A1 (fr) 2018-08-29
EP3365537B1 true EP3365537B1 (fr) 2019-11-06

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ID=57199863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16785341.5A Active EP3365537B1 (fr) 2015-10-22 2016-09-30 Bague coulissante pour selection de came de commande de soupape

Country Status (4)

Country Link
EP (1) EP3365537B1 (fr)
CN (1) CN108350769A (fr)
DE (1) DE102015220602A1 (fr)
WO (1) WO2017067549A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12031460B2 (en) 2020-08-12 2024-07-09 Thyssenkrupp Dynamic Components Gmbh Sliding cam system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017115462A1 (de) 2017-07-11 2019-01-17 Schaeffler Technologies AG & Co. KG Nockenstück eines Ventiltriebs

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Publication number Priority date Publication date Assignee Title
DE102007010149A1 (de) 2007-03-02 2008-09-04 Audi Ag Ventiltrieb für Gaswechselventile einer Brennkraftmaschine mit verschiebbarem Nockenträger und Doppelschneckentrieb
DE102007054978B4 (de) * 2007-11-17 2023-12-14 Mercedes-Benz Group AG Ventiltriebvorrichtung
DE102008060167B4 (de) * 2008-11-27 2021-05-27 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Ventiltrieb einer Brennkraftmaschine
DE102008060166A1 (de) * 2008-11-27 2010-06-02 Dr.Ing.H.C.F.Porsche Aktiengesellschaft Ventiltrieb für Gaswechselventile einer Brennkraftmaschine
US8714125B2 (en) * 2009-10-06 2014-05-06 Yamaha Hatsudoki Kabushiki Kaisha Valve gear of engine
DE102010033087A1 (de) * 2010-08-02 2012-02-02 Schaeffler Technologies Gmbh & Co. Kg Ventiltrieb einer Brennkraftmaschine
DE102010060766B4 (de) * 2010-11-24 2023-06-07 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Schiebenockensystem zur Verwendung bei einem Ventiltrieb einer Brennkraftmaschine
DE102011056833B4 (de) * 2011-12-21 2023-03-23 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Ventiltriebvorrichtung für eine Brennkraftmaschine
DE102013201827A1 (de) * 2013-02-05 2014-08-07 Schaeffler Technologies Gmbh & Co. Kg Diagnoseverfahren eines Ventiltrieb-Aktuators
DE102013221244A1 (de) * 2013-10-21 2015-04-23 Volkswagen Aktiengesellschaft Vorrichtung zur Nockenwellenverstellung einer Brennkraftmaschine

Non-Patent Citations (1)

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Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12031460B2 (en) 2020-08-12 2024-07-09 Thyssenkrupp Dynamic Components Gmbh Sliding cam system

Also Published As

Publication number Publication date
EP3365537A1 (fr) 2018-08-29
WO2017067549A1 (fr) 2017-04-27
DE102015220602A1 (de) 2017-04-27
CN108350769A (zh) 2018-07-31

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