EP2766581B1 - Arbre à cames et élément fonctionnel destiné à un arbre à cames - Google Patents

Arbre à cames et élément fonctionnel destiné à un arbre à cames Download PDF

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Publication number
EP2766581B1
EP2766581B1 EP12778262.1A EP12778262A EP2766581B1 EP 2766581 B1 EP2766581 B1 EP 2766581B1 EP 12778262 A EP12778262 A EP 12778262A EP 2766581 B1 EP2766581 B1 EP 2766581B1
Authority
EP
European Patent Office
Prior art keywords
inner shaft
functional
camshaft
shaft
functional elements
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.)
Active
Application number
EP12778262.1A
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German (de)
English (en)
Other versions
EP2766581A1 (fr
Inventor
Michael Kunz
Bernd Mann
Markus Melzer
Jürgen MEUSEL
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.)
Thyssenkrupp Dynamic Components Teccenter AG
Original Assignee
ThyssenKrupp Presta TecCenter 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 ThyssenKrupp Presta TecCenter AG filed Critical ThyssenKrupp Presta TecCenter AG
Publication of EP2766581A1 publication Critical patent/EP2766581A1/fr
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Publication of EP2766581B1 publication Critical patent/EP2766581B1/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
    • 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
    • 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
    • F01L1/08—Shape of cams
    • 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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • 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
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F01L2303/02—Initial camshaft settings
    • 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
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F01L2800/17—Maintenance; Servicing

Definitions

  • the invention relates to a camshaft, in particular for motor vehicle engines, with an outer shaft and a coaxially arranged in the outer shaft inner shaft, with first on the outer shaft fixedly arranged functional elements, with second functional elements which are rotatably mounted on the outer shaft and rotatably attached to the inner shaft and with a phase adjuster connected to the outer shaft and inner shaft for rotating the inner shaft relative to the outer shaft, wherein the phase adjuster is fastened with the application of a torque to the inner shaft.
  • a generic camshaft is from the DE 10 2010 036 145 A1 known. Opposite the phase adjuster, a recess is provided on an end face of the inner shaft, which allows a centering or holding during assembly.
  • the US 20070215075 A1 discloses an adjustment device located in the oil separator chamber, in this case a hexagon, which, however, can also be arranged in the valve chamber in this embodiment as well as in other embodiments.
  • At least part of the first functional elements as well as the second functional elements are cams which can control the inlet or outlet of an internal combustion engine.
  • cams By adjusting the cam attached to the inner shaft relative to the cam attached to the outer shaft, a variable control of the valves of the internal combustion engine is possible. For example, depending on load and speed, the ratio of inlet time and outlet time can be changed.
  • the rotation of the inner shaft and outer shaft is effected by a phaser, which is also referred to as a phaser.
  • the phase adjuster usually comprises a stator connected to the outer shaft and a rotor connected to the inner shaft.
  • the motor is rotatably connected via the inner shaft and the rotor is connected to the outer shaft.
  • positive, positive and / or cohesive connections are also known releasable connections by screwing.
  • the screwing is usually carried out by means of a central screw, which rests in the fixed state on an end face of the phaser and engages in a receptacle of the inner shaft.
  • a holding torque opposite to the tightening torque must be applied.
  • the inner shaft Since the inner shaft is disposed within the outer shaft, this is held in the tightening of the central screw at the opposite end of the shaft.
  • an assembly tool is provided in practice, which engages in an associated receptacle of the inner shaft.
  • this torsion can be so strong that the cams remote from the phaser or other functional elements which are fastened to the inner shaft strike at an end position.
  • the inner shaft associated functional elements are fastened by connecting elements which extend through slots of the outer shaft. The length of the slots is determined by the intended adjustment between the inner shaft and outer shaft.
  • the JP 2004 044 445 A relates to a generic, non-adjustable camshaft in which all cams are fixedly mounted on a solid rod. Accordingly, the camshaft includes no mutually movable parts or a phaser. In order to hold the entire shaft during assembly, a hexagonal structure is arranged independently of the individual cams on a separate end piece.
  • the invention has for its object to reduce the twisted length of the inner shaft in an attachment of the phaser on the inner shaft by applying a torque and thus to increase the accuracy and reproducibility.
  • the object is achieved in that one of the non-rotatably connected to the inner shaft second functional elements outside a functional surface has shell-side tool receiving surfaces.
  • the second functional element provided with the tool receiving surfaces may be one of the cams connected to the inner shaft, a sensor wheel, a bearing element or a bearing ring.
  • a second functional element is used, which is close to the phaser, so that the smallest possible toroidal length is achieved.
  • the functional elements connected to the inner shaft have on the one hand a functional surface and on the other hand an axially offset annular collar, wherein the fastening of the functional elements to the inner shaft by means of a connecting element, for example with a pen, done.
  • the tool receiving surfaces can then be generated in a particularly simple manner on the annular collar.
  • the tool receiving surfaces are formed as key surfaces for receiving a tool key.
  • key surfaces for receiving a tool key.
  • two circumferentially opposite surfaces, a polygon or a differently shaped profile shape with teeth, or polygonal shape or the like may be provided.
  • the phase adjuster has a component connected to the outer shaft and a component connected to the inner shaft, wherein the connection with the inner shaft is expediently effected by a central screw.
  • the component connected to the inner shaft is preferably the rotor of the phaser.
  • the subject matter of the invention is also a functional element for a camshaft, in particular a cam, with a hub, a shell-side functional surface and an annular collar offset from the functional surface along the axis of the hub, wherein the above-described tool receiving surfaces are formed on the annular collar.
  • the Fig. 1 shows the known from the prior art construction of an adjustable camshaft of an internal combustion engine with an outer shaft 1 and a coaxially arranged in the outer shaft 1 inner shaft 2.
  • first functional elements 3 are fixed in the form of cams.
  • second functional elements 4a, 4b are non-rotatably mounted in the form of cams and in the form of a sensor wheel.
  • a phase adjuster 5 is arranged on the front side.
  • the phaser 5 which is also referred to as a phaser, has a stator 6 connected to the outer shaft 1 and a rotor 7 connected to the inner shaft 2.
  • a rotation between the stator 6 and the rotor 7 can for example be done hydraulically, so that a controlled adjustment of the inner shaft 2 relative to the outer shaft 1 is possible by a corresponding control.
  • the rotor 7 is fastened with a central screw 8 by applying a tightening torque to the inner shaft 1.
  • the attachment of the second functional elements 4a, 4b on the inner shaft takes place in the embodiment by connecting elements 9 such as pins, which are pressed during assembly and are guided through not shown in the figures longitudinal slots of the outer shaft 1.
  • the inner shaft 2 In order to secure the rotor 7 by means of the central screw 8 on the inner shaft 2, the inner shaft 2 must be held in the tightening of the central screw 8.
  • a tool holder 10 is provided at the opposite end of the inner shaft 2.
  • the length of the inner shaft 2 necessary for the transmission is reduced by being able to be held against one of the second functional elements 4a, 4b during tightening. That's how it shows Fig. 2 an embodiment according to the invention, in which of the second, connected to the inner shaft 2 functional elements 4a, 4b, the first functional element 4a is provided in the form of a cam with shell-side tool receiving surfaces 11. These tool receiving surfaces 11 are located on an annular collar 13 outside the actual functional surface 12a, which has provided for controlling the valves cam shape.
  • the first of the second functional elements 4a, 4b is already equipped with tool receiving surfaces 11.
  • a cam but also another second functional element 4b in the form of a sensor wheel can be provided with tool receiving surfaces 11, whereby the arrangement of the tool receiving surfaces 11 outside of the functional surface 12b of the sensor wheel on an annular collar 13 takes place here as well.
  • Fig. 5 shows an alternative embodiment in which instead of two exactly opposite tool receiving surfaces 11, the shape of a polygon is realized. This results in the advantage that a tool for holding in different orientations can be applied.
  • FIG. 6 an embodiment in which two opposing tool receiving surfaces 11 are arranged on the second functional element 4b in the form of a sensor wheel.
  • the accuracy and reliability in the attachment of the phaser 5 on the inner shaft 2 by means of the central screw 8 can be increased.
  • the tool receiving surfaces 11 can also be otherwise used to hold the associated second functional elements 4a, 4b, for example, when the second functional elements 4a are ground in the form of cams before or after assembly to measure.
  • Fig. 7a and 7b show the section of a camshaft with an alternative embodiment of the second, connected to the inner shaft 2 functional elements 4a in the form of cams.
  • the cam has no annular collar 13.
  • the functional surface 12a is interrupted by a recess 14, wherein in the recess on the one hand the connecting element 9 is arranged in the form of a pin and the tool receiving surfaces 11 are provided.
  • the described alternative embodiment of the second functional elements 4a leads to a lower material and space requirement.

Landscapes

  • 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 (7)

  1. Arbre à cames, en particulier pour moteurs de véhicule automobile,
    avec un arbre extérieur (1) et un arbre intérieur (2) agencé coaxialement dans l'arbre extérieur (1),
    avec des premiers éléments fonctionnels (3) agencés fixement disposés sur l'arbre extérieur (1),
    avec des deuxièmes éléments fonctionnels (4a, 4b), qui sont fixés de manière à pouvoir tourner sur l'arbre extérieur (1) et de manière solidaire en rotation à l'arbre intérieur (2),
    et avec un déphaseur (5) raccordé à l'arbre extérieur (1) et à l'arbre intérieur (2) pour la rotation de l'arbre intérieur (2) par rapport à l'arbre extérieur (1), le déphaseur (5) étant fixé à l'arbre intérieur (2) de manière à entraîner l'application d'un couple,
    caractérisé en ce qu'un des éléments fonctionnels (4a, 4b) relié fixement à l'arbre intérieur (2) comporte en dehors d'une surface fonctionnelle (12a, 12b) des surfaces de logement d'outil (11) côté extérieur.
  2. Arbre à cames selon la revendication 1, caractérisé en ce que le déphaseur (5) comporte un stator (6) relié à l'arbre extérieur (1) et un rotor (7) relié à l'arbre intérieur (2) au moyen d'un raccord à vis.
  3. Arbre à cames selon la revendication 1 ou 2 caractérisé en ce que le déphaseur (5) et l'arbre intérieur (2) sont raccordés par une vis centrale (8).
  4. Arbre à cames selon l'une quelconque des revendications 1 à 3 caractérisé en ce que les surfaces de logement d'outil (11) sont constituées comme des surfaces de clé pour recevoir une clé d'outil.
  5. Arbre à cames selon l'une quelconque des revendications 1 à 4 caractérisé en ce que l'élément fonctionnel (4a, 4b) doté des surfaces de logement d'outil (11) comporte dans le sens axial de l'arbre à cames un collet annulaire (13) disposé décalé par rapport aux surfaces fonctionnelles (12a, 12b) sur lequel l'élément fonctionnel (4a, 4b) est fixé à l'arbre intérieur (2) avec un élément de raccord (9) et sur lequel sont constituées les surfaces de logement d'outil (11).
  6. Arbre à cames selon l'une quelconque des revendications 1 à 5 caractérisé en ce qu'en partant du déphaseur (5) le premier des deuxièmes éléments fonctionnels (4a) est doté de surfaces de logement d'outil (11).
  7. Elément fonctionnel (4a, 4b) pour un arbre à cames selon les revendications 1 à 6, en particulier des cames, avec un moyeu, une surface fonctionnelle (12a, 12b) côté extérieur et un collet annulaire (13) décalé par rapport à la surface fonctionnelle (12a, 12b) le long de l'axe du moyeu, pour lequel des surfaces de logement d'outil (11) sont constituées sur le collet annulaire (13).
EP12778262.1A 2011-10-10 2012-10-08 Arbre à cames et élément fonctionnel destiné à un arbre à cames Active EP2766581B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011054350A DE102011054350A1 (de) 2011-10-10 2011-10-10 Nockenwelle sowie Funktionselemente für eine Nockenwelle
PCT/EP2012/069866 WO2013053669A1 (fr) 2011-10-10 2012-10-08 Arbre à cames et élément fonctionnel destiné à un arbre à cames

Publications (2)

Publication Number Publication Date
EP2766581A1 EP2766581A1 (fr) 2014-08-20
EP2766581B1 true EP2766581B1 (fr) 2015-09-09

Family

ID=47076169

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12778262.1A Active EP2766581B1 (fr) 2011-10-10 2012-10-08 Arbre à cames et élément fonctionnel destiné à un arbre à cames

Country Status (5)

Country Link
US (1) US9200544B2 (fr)
EP (1) EP2766581B1 (fr)
CN (1) CN103987927B (fr)
DE (1) DE102011054350A1 (fr)
WO (1) WO2013053669A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016206672A1 (de) 2016-04-20 2017-10-26 Mahle International Gmbh Verfahren zum Greifen und Halten einer verstellbaren Nockenwelle
DE102016206674A1 (de) 2016-04-20 2017-10-26 Mahle International Gmbh Verfahren zum Greifen und Halten einer verstellbaren Nockenwelle

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DE102011052822A1 (de) * 2011-08-18 2013-02-21 Thyssenkrupp Presta Teccenter Ag Nockenwelle, insbesondere für Kraftfahrzeugmotoren
DE102013216567A1 (de) * 2013-08-21 2015-02-26 Mahle International Gmbh Ausrichtvorrichtung
DE102013113444A1 (de) * 2013-12-04 2015-06-11 Thyssenkrupp Presta Teccenter Ag Aufnahmeanordnung für die Schleifbearbeitung einer Nockenwelle und Verfahren zur Schleifbearbeitung der Nockenwelle
KR101427904B1 (ko) * 2014-07-10 2014-08-08 주식회사 미보 컨센트릭 캠샤프트 및 컨센트릭 캠샤프트의 이동캠 또는 고정캠 제조방법
DE102015200139B4 (de) * 2015-01-08 2021-07-08 Schaeffler Technologies AG & Co. KG Nockenwellenverstelleranbindung an eine Doppelnockenwelle
DE102015113356A1 (de) * 2015-08-13 2017-02-16 Thyssenkrupp Ag Verstellbare Nockenwelle mit einem Phasenteller
DE102015113520A1 (de) * 2015-08-17 2017-02-23 Thyssenkrupp Presta Teccenter Ag Modulbaugruppe
FR3043716B1 (fr) * 2015-11-12 2019-10-11 Psa Automobiles Sa. Ensemble de distribution variable pour un moteur a combustion interne
GB2556921B (en) * 2016-11-25 2019-03-13 Ford Global Tech Llc A method of adaptively controlling a motor vehicle engine system
DE102021213496A1 (de) 2021-11-30 2023-06-01 Thyssenkrupp Ag Verfahren zur Montage eines Funktionselementes auf einer Schiebenockenwelle unter Zuhilfenahme eines Montagewerkzeugs, sowie Verwendung einer Außenverzahnung oder eines unrunden Abschnitts einer Schiebenockenwelle

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GB2277361B (en) * 1993-04-21 1995-11-08 T & N Technology Ltd Manufacture of camshafts
JP4082109B2 (ja) * 2002-07-10 2008-04-30 日産自動車株式会社 内燃機関の組立式カムシャフト
DE102005040934A1 (de) * 2005-02-03 2006-08-17 Mahle International Gmbh Verstellbare Nockenwelle, insbesondere für Verbrennungsmotoren von Kraftfahrzeugen, mit einer hydraulischen Stelleinrichtung
DE102006012611A1 (de) * 2006-03-20 2007-09-27 Mahle International Gmbh Zylinderkopf eines Verbrennungsmotors
DE102007017094A1 (de) * 2007-04-10 2008-10-16 Mahle International Gmbh Nocken für eine Nocken- oder Steuerwelle
DE102007027979B4 (de) * 2007-06-19 2015-07-23 Audi Ag Ventiltrieb für Gaswechselventile einer Brennkraftmaschine mit Nockenwellen-Tunnellager
US8096275B2 (en) * 2009-09-15 2012-01-17 GM Global Technology Operations LLC Camshaft having a tuned mass damper
DE102010024721A1 (de) * 2010-06-23 2012-03-29 Mahle International Gmbh Nocken und zugehörige Nockenwelle
US8833202B2 (en) * 2010-12-28 2014-09-16 Toyota Jidosha Kabushiki Kaisha Dual camshaft structure and method for assembling dual camshaft structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016206672A1 (de) 2016-04-20 2017-10-26 Mahle International Gmbh Verfahren zum Greifen und Halten einer verstellbaren Nockenwelle
DE102016206674A1 (de) 2016-04-20 2017-10-26 Mahle International Gmbh Verfahren zum Greifen und Halten einer verstellbaren Nockenwelle

Also Published As

Publication number Publication date
WO2013053669A1 (fr) 2013-04-18
EP2766581A1 (fr) 2014-08-20
CN103987927B (zh) 2016-10-26
CN103987927A (zh) 2014-08-13
US9200544B2 (en) 2015-12-01
DE102011054350A1 (de) 2013-04-11
US20140245980A1 (en) 2014-09-04

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