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WO2008125565A1 - Arbre à cames - Google Patents

Arbre à cames Download PDF

Info

Publication number
WO2008125565A1
WO2008125565A1 PCT/EP2008/054284 EP2008054284W WO2008125565A1 WO 2008125565 A1 WO2008125565 A1 WO 2008125565A1 EP 2008054284 W EP2008054284 W EP 2008054284W WO 2008125565 A1 WO2008125565 A1 WO 2008125565A1
Authority
WO
WIPO (PCT)
Prior art keywords
stop
outer shaft
shaft
adjusting device
inner shaft
Prior art date
Application number
PCT/EP2008/054284
Other languages
German (de)
English (en)
Inventor
Marius Dusik
Oliver Fritz
Hermann Hoffmann
Original Assignee
Mahle International Gmbh
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 Mahle International Gmbh filed Critical Mahle International Gmbh
Publication of WO2008125565A1 publication Critical patent/WO2008125565A1/fr

Links

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
    • 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
    • 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

Definitions

  • the invention relates to a camshaft of in particular motor vehicle engines with a coaxially arranged in an outer shaft inner shaft, which is rotatably mounted against the outer shaft.
  • camshaft adjusters To reduce fuel consumption and pollutant emissions as well as to increase power and torque, many Otto engines are usually equipped with camshaft adjusters. These camshaft adjusters, also known as phasers, change the phasing of the camshaft relative to the crankshaft. In the case of camshafts with an inner shaft arranged coaxially in an outer shaft, such a phaser can also adjust a phase of the inner shaft relative to the outer shaft.
  • the invention is based on the general idea, on a phase adjusting device for adjusting a phase position of an inner and an outer shaft relative to each other and / or to provide a drive, a stop device which either alone or together with the phase adjusting a stop for the outer shaft and the inner shaft forms, so that the axial play of the two waves is completely canceled in the best case.
  • the inner shaft is mounted coaxially rotatable in the usual manner in the outer shaft, wherein the phase adjusting device according to the invention is mounted on a longitudinal end of the camshaft.
  • the stop device of the phase adjusting device has at least a first axial stop for the outer shaft.
  • a second axial stop for the inner shaft is provided either on the stop device or on the phase adjusting device, whereby the phase adjusting device fixes the inner shaft axially to the outer shaft in its mounting position via the stop device.
  • the outer shaft without mounted phase adjusting device can have a great game to the inner shaft, which is canceled only when mounting the phase adjusting device or a VLD (Variable Lift Duration). Due to the non-positive connection of the phase adjusting device both to the outer shaft and directly or indirectly to the inner shaft, the inner shaft is fixed in a well-defined axial position to the outer shaft.
  • the stop device expediently has an internal thread via which the stop device can be screwed onto an outer thread of the outer shaft, wherein the outer thread is formed either directly on the outer shaft or indirectly on a counter-stop element mounted on the outer shaft.
  • the outer shaft or the counter-stop element on a collar which abuts when mounted phase adjusting device on the first axial stop of the stop device. Due to the internal thread on the stop device and the associated external thread on the outer shaft or on the counter stop element, a simple connection between the phase adjusting device and the outer shaft can be achieved, since the phase adjusting device only has to be screwed on for connection to the outer shaft.
  • the provision of the collar on the outer shaft or on the genanschlagelement defines an exact axial position between the phase adjusting device and the outer shaft, whereby a high alignment accuracy between the phase adjusting device and the outer shaft can be achieved.
  • the inner shaft and the outer shaft each have at least one transverse to the shaft axis passage opening for receiving a continuous mounting pin, wherein either the passage opening in the inner shaft or the passage opening in the outer shaft is formed as extending in the axial direction slot.
  • the passage openings according to the invention allow an angle exact positioning of the inner shaft to the outer shaft and thus the respectively connected to the shafts cam, the formation of at least one through hole as an axial slot allows axial displacement of the inner shaft with respect to the outer shaft, so that when mounting the phase adjusting a axial adjustment of the two shafts can be done to each other easily, while both waves are already fixed with respect to their angle of rotation by the mounting pin.
  • a simplified camshaft assembly is achieved, which also ensures an increased quality of assembly.
  • the stop device forms an integral part of the phase adjusting device. It is conceivable here that the stop device is formed either as a separate component and before assembly to the camshaft is connected to the phase adjusting device or that the stop device is already incorporated in a housing part of the phase adjusting device, that is integrated. In particular, the last solution variant allows a common production of the stop device together with the phase adjusting device, so that a subsequent mounting of the stop device on the phase adjusting unnecessary and thereby streamline the manufacturing process and make it cheaper.
  • FIG. 1 shows a longitudinal section through a camshaft according to the invention with a longitudinal end side attachable thereto phase adjusting device
  • FIG. 2 is a representation as in Fig. 1, but with mounted phase adjusting device
  • Fig. 3 is a representation as in Fig. 2, but in a partial sectional view.
  • a camshaft 1 in particular a camshaft 1 of a motor vehicle engine, a coaxially arranged in an outer shaft 2 inner shaft 3, which is rotatably mounted against the outer shaft 2.
  • the camshaft 1 preferably has mutually rotatable first cam 4 and second cam 5, of which the first cam 4 fixed to the inner shaft 3 and the second cam 5 are fixedly connected to the outer shaft 2.
  • a camshaft 1 designed in this way requires a phase adjusting device 6, which preferably comprises two phase adjusters, not shown.
  • a first phase adjuster can thereby adjust a phase angle of the inner shaft 3 and thus the first cam 4 to a drive, not shown, while a second phaser can adjust a phase position of the outer shaft 2 and thus the second cam 5 relative to the drive.
  • VLD variable-lift-duration system
  • movable cams are used and a cam follower (not shown) is inserted between the individual cams 5 and 5 '(see FIG.
  • a cam follower (not shown) is inserted between the individual cams 5 and 5 '(see FIG.
  • an axial clearance of the inner shaft 3 to the outer shaft 2 is kept as small as possible.
  • a large axial play is permitted between the inner shaft 3 and the outer shaft 2, provided the phase adjusting device 6 is not yet mounted, while this axial play is removed during assembly of the phase adjustment device 6, in particular in the case of a VLD actuator.
  • the phase adjusting device 6 each have a stop device 7, with at least one first axial stop 8 for the outer shaft 2.
  • at least one second axial stop 9 for the inner shaft 3 on the stop device 7 or on the phase adjusting device 6 is provided, so that the stop device 7 alone or together with the phase adjusting device 6 is able to fix the inner shaft 3 to the outer shaft 2 axially.
  • both the first axial stop 8 for the outer shaft 2 and the second axial stop 9 for the inner shaft 3 are arranged on the stop device 7.
  • the stop device 7 can be designed as a separate component for the phase adjusting device 6 and can be mounted together with the latter on the camshaft 1 or form an integral part of the phase adjusting device 6. As can be seen from FIG. 2, the stop device 7 fixes the inner shaft 3 to the outer shaft 2 in the axial direction in its mounting position together with the phase adjusting device 6.
  • an internal thread 10 is provided in the region of the stop means 7, via which the stop means 7 can be screwed onto an external thread 11 of the outer shaft 2, wherein the external thread 11 either directly on the Outer shaft 2 or indirectly on a mounted on the outer shaft 2 counter stop element 12 may be formed.
  • the external thread 11 is formed on the counter stop element 12.
  • phase adjusting device 6 and the stopper 7 on an axial passage opening 14, which is aligned with mounted on the camshaft 1 phase adjusting device 6 with an engagement opening 15 in the inner shaft 3 .
  • a fixing element 16 for example a screw
  • the second axial stop 9 can either - as shown in FIGS. 1 to 3 - be formed by the phase adjusting device 6 itself or it is on the stopper 7, for example in the form of a radial annular step, provided.
  • the through hole 14 preferably has a tapered in the direction of the camshaft 1, in particular radially stepped inner contour, which is formed so that the radial step 18 a stop surface for the fixing element 16, in particular for a screw head 19 forms.
  • a radial stage 18 can be produced inexpensively and easily.
  • the inner shaft 3 and the outer shaft 2 each have at least one transverse to the shaft axis through hole 14 ', 14' 'for receiving a continuous mounting pin 20, either the through hole 14' of the inner shaft 3 or the through hole 14th '' of the outer shaft 2 is formed as in the axial direction of the camshaft 1 extending slot.
  • the formation of one of the two through-openings 14 ', 14' 'thus allows a certain axial play of the inner shaft 3 to the outer shaft 2, wherein the formation allows only a movement of the two shafts 2.3 in the axial direction, while a rotational movement about the shaft axis is excluded so that the inner shaft 3 and thereby the first cams 4 can be brought into phase exactly to the outer shaft 2 and the second cam 5, respectively.
  • the mounting pin 20 may be, for example, a cylindrical bolt.
  • a trigger wheel (not shown) forms an integral part of the counter stop element 12 and / or that the stop device 7 forms an integral part of the phase adjustment device 6.
  • the inner shaft 3 has at its end facing the phase adjusting device 6 a radially enlarged end region, in particular a head 21, via which the inner shaft 3 abuts when mounted phase adjusting device 6 on the second axial stop 9.
  • the head 21 prevents slippage of the inner shaft 3 by the outer shaft 2, whereby the assembly of the camshaft 1 can be facilitated as a whole.
  • phase adjusting device 6 By means of the phase adjusting device 6 according to the invention with the stop device 7 attached thereto or integrated into it, assembly of the camshaft 1 with a very high axial positioning accuracy of the outer shaft 2 with respect to the inner shaft 3 is facilitated, whereby due to the low requirements and the few components a simple and inexpensive Camshaft mounting can be achieved. In addition, there are no problems with respect to an axial overdetermination. In contrast, allows the mounting pin 20 with the passage openings 14 ', 14' according to the invention in the inner shaft 3 and the outer shaft 2, one of which is formed as extending in the axial direction slot hole a simple way, the inner shaft 3 with respect to its rotation angle exactly to the outer shaft. 2 to position, whereas an axial relative movement of the inner shaft 3 to the outer shaft 2 is maintained until complete installation of the phase adjusting device 6.

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

Abstract

L'invention concerne un arbre à cames réglable (1), notamment pour des moteurs de véhicules automobiles, comprenant un arbre interne (3) disposé coaxialement dans un arbre externe (2), l'arbre externe (2) et l'arbre interne (3) étant montés de manière à pouvoir tourner l'un par rapport à l'autre. L'arbre à cames comprend en outre au moins un dispositif de réglage de phase (6) pouvant être monté sur une extrémité longitudinale de l'arbre à cames (1), qui règle une position de phase de l'arbre interne (3) et de l'arbre externe (2) l'un par rapport à l'autre et/ou par rapport à un entraînement. En l'occurrence, le dispositif de réglage de phase (6) présente un dispositif de butée (7) avec au moins une première butée axiale (8) pour l'arbre externe (2). Sur le dispositif de butée (7) ou sur le dispositif de réglage de phase (6) est disposée au moins une deuxième butée axiale (9) pour l'arbre interne (3), le dispositif de butée (7) fixant axialement, à lui seul ou conjointement avec le dispositif de réglage de phase (6), l'arbre interne (3) par rapport à l'arbre externe (2).
PCT/EP2008/054284 2007-04-13 2008-04-09 Arbre à cames WO2008125565A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007017514.2 2007-04-13
DE102007017514A DE102007017514A1 (de) 2007-04-13 2007-04-13 Nockenwelle

Publications (1)

Publication Number Publication Date
WO2008125565A1 true WO2008125565A1 (fr) 2008-10-23

Family

ID=39528925

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/054284 WO2008125565A1 (fr) 2007-04-13 2008-04-09 Arbre à cames

Country Status (2)

Country Link
DE (1) DE102007017514A1 (fr)
WO (1) WO2008125565A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103732866A (zh) * 2011-08-18 2014-04-16 蒂森克虏伯普利斯坦技术中心股份公司 凸轮轴特别是用于机动车发动机的凸轮轴
DE102013216567A1 (de) * 2013-08-21 2015-02-26 Mahle International Gmbh Ausrichtvorrichtung
US8978605B2 (en) 2011-06-15 2015-03-17 Schaeffler Technologies AG & Co. KG Phase-adjusting device of a camshaft for an internal combustion engine

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120199085A1 (en) * 2009-10-05 2012-08-09 Schaeffler Technologies AG & Co. KG Camshaft arrangement
DE102011076652B4 (de) * 2011-05-27 2017-06-01 Schwäbische Hüttenwerke Automotive GmbH Vorrichtung zur Verstellung der relativen Drehwinkelposition geschachtelter Nockenwellen
DE102011106394A1 (de) * 2011-07-02 2013-01-03 Volkswagen Aktiengesellschaft Brennkraftmaschine
DE102011052819A1 (de) * 2011-08-18 2013-02-21 Thyssenkrupp Presta Teccenter Ag Nockenwelle, insbesondere für Kraftfahrzeugmotoren
DE102011082591A1 (de) * 2011-09-13 2013-03-14 Schaeffler Technologies AG & Co. KG Axiallagerung bei Doppelnockenwellen, Nockenwellenverstellvorrichtung und Verbrennungskraftmaschine
DE102016214501B4 (de) 2015-10-28 2021-07-29 Schaeffler Technologies AG & Co. KG Nockenwellenverstellvorrichtung
DE102016206674A1 (de) * 2016-04-20 2017-10-26 Mahle International Gmbh Verfahren zum Greifen und Halten einer verstellbaren Nockenwelle
DE102016208968A1 (de) * 2016-05-24 2017-11-30 Thyssenkrupp Ag Schiebemodul einer Nockenwelle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4517934A (en) * 1979-07-26 1985-05-21 Volkswagenwerk Aktiengesellschaft Controllable camshaft for a drive, preferably an internal combustion engine
JPH07224617A (ja) * 1994-02-09 1995-08-22 Unisia Jecs Corp 内燃機関のバルブタイミング制御装置
GB2369175A (en) * 2000-11-18 2002-05-22 Mechadyne Plc Variable phase coupling
WO2006030587A1 (fr) * 2004-09-15 2006-03-23 Yamaha Hatsudoki Kabushiki Kaisha Dispositif d'entraînement de soupape variable, moteur et motocyclette
EP1696107A1 (fr) * 2005-02-23 2006-08-30 Mechadyne plc Système d'arbre à cames

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8923181D0 (en) * 1989-10-13 1989-11-29 Rover Group An internal combustion engine
US5417186A (en) * 1993-06-28 1995-05-23 Clemson University Dual-acting apparatus for variable valve timing and the like
GB2424256A (en) * 2005-03-16 2006-09-20 Mechadyne Ltd SCP assembly with spring mounted on camshaft rather than within phaser housing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4517934A (en) * 1979-07-26 1985-05-21 Volkswagenwerk Aktiengesellschaft Controllable camshaft for a drive, preferably an internal combustion engine
JPH07224617A (ja) * 1994-02-09 1995-08-22 Unisia Jecs Corp 内燃機関のバルブタイミング制御装置
GB2369175A (en) * 2000-11-18 2002-05-22 Mechadyne Plc Variable phase coupling
WO2006030587A1 (fr) * 2004-09-15 2006-03-23 Yamaha Hatsudoki Kabushiki Kaisha Dispositif d'entraînement de soupape variable, moteur et motocyclette
EP1696107A1 (fr) * 2005-02-23 2006-08-30 Mechadyne plc Système d'arbre à cames

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8978605B2 (en) 2011-06-15 2015-03-17 Schaeffler Technologies AG & Co. KG Phase-adjusting device of a camshaft for an internal combustion engine
CN103732866A (zh) * 2011-08-18 2014-04-16 蒂森克虏伯普利斯坦技术中心股份公司 凸轮轴特别是用于机动车发动机的凸轮轴
DE102013216567A1 (de) * 2013-08-21 2015-02-26 Mahle International Gmbh Ausrichtvorrichtung

Also Published As

Publication number Publication date
DE102007017514A1 (de) 2008-10-16

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