EP3347578B1 - Nockenwellenversteller - Google Patents

Nockenwellenversteller Download PDF

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Publication number
EP3347578B1
EP3347578B1 EP16770885.8A EP16770885A EP3347578B1 EP 3347578 B1 EP3347578 B1 EP 3347578B1 EP 16770885 A EP16770885 A EP 16770885A EP 3347578 B1 EP3347578 B1 EP 3347578B1
Authority
EP
European Patent Office
Prior art keywords
actuating
housing
plain bearing
output element
shaft
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
EP16770885.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3347578A1 (de
Inventor
Mike Kohrs
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
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP3347578A1 publication Critical patent/EP3347578A1/de
Application granted granted Critical
Publication of EP3347578B1 publication Critical patent/EP3347578B1/de
Active 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
    • F01L1/34—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
    • F01L1/352—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 bevel or epicyclic 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
    • F01L1/34—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
    • 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
    • F01L2001/0476—Camshaft bearings
    • 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
    • F01L1/352—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 bevel or epicyclic gear
    • F01L2001/3522—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 bevel or epicyclic gear with electromagnetic brake

Definitions

  • the invention relates to a suitable for a camshaft adjuster an internal combustion engine actuator having a housing, an associated with this drive wheel, an adjusting, in particular three-shaft gear, such as wave gear, as well as for connection to a shaft, in particular the camshaft of the internal combustion engine, provided output member.
  • camshaft adjusters Such adjusting devices in camshaft adjusters are known, for example, from US Pat US 2007/0051332 A1 as well as from the WO 2006/018080 A1 known. In both cases, these are electrically operated camshaft adjusters.
  • camshaft adjusters For the storage of rotatable parts within camshaft adjusters or of rotatable parts, which are connected to components with camshaft adjusters, rolling bearings or sliding bearings are suitable in principle.
  • a camshaft adjuster with a plain bearing is missing US 2013 / 0081587A1 out.
  • Electrically actuated adjusting devices in internal combustion engines can be used not only with camshaft adjusters but, for example, also with devices for adjusting the valve lift and / or the compression.
  • the invention has for its object to further develop a suitable for a camshaft adjuster with respect to the cited prior art in particular with regard to robust, reliable bearings at the same time compact design.
  • suitable adjusting device comprises a composite of any number of individual parts housing, connected to the housing or formed as an integral part of the housing drive wheel, a control gear , In particular in the form of a three-shaft gear, for example, wave gear, as well as a for connection to a driven shaft, in particular camshaft, provided output member.
  • a slide bearing is provided, which, viewed in the axial direction of the driven shaft, is arranged between the actuating gear and the drive wheel. With the output element, a flange is connected to the front side, which projects beyond the output element in the radial direction.
  • the sliding bearing is adjacent to the flange, which may be part of the actuating gear;
  • the sliding bearing is arranged axially between the flange and the drive wheel.
  • the plain bearing is particularly space-saving with a small axial distance to the drive wheel housed in the housing, which means a special insensitivity to tilting due to the low effective Hebelarminn.
  • the output element is at the same time designed as a stop disc for the driven shaft, in particular camshaft.
  • the stop disc which limits an adjustment angle of the driven shaft, preferably has a cylindrical, concentric with the axis of rotation of drive wheel and driven element recess, in which one end of the driven shaft or an intermediate piece connected thereto can be placed to produce a rotationally fixed connection.
  • the housing of the adjusting device in the region of the plain bearing axial grooves and / or has at least one groove extending in the circumferential direction.
  • Such grooves favor in particular the flow of lubricant within the actuator.
  • the adjusting gear has a connected to said flange or integrally formed Abtriebshohlrad, which is mounted in the housing by means of a second sliding bearing.
  • the output ring gear can be internally toothed or firmly connected to a sleeve-shaped, internally toothed component.
  • a particularly robust construction of the adjusting device is realized by the double slide bearing.
  • the two sliding bearings may have different axial dimensions.
  • the first, axially disposed between the actuating gear and the drive bearing plain bearing has a smaller diameter and a greater axial extent than the second, the output ring gear overlapping plain bearing. The lever lengths are shortened again.
  • the advantage of the arrangement of the first sliding bearing axially between the drive wheel and the actuating gear, in particular wave gear, compared to a principle possible sliding bearing of a toothed component, in particular Abtriebshohlrads, in the housing has the particular advantage that particularly low lever length, measured in the axial direction of the camshaft adjuster , are given and thus at most to a small extent not desired, potentially increasing the friction tilting moments are generated within the camshaft adjuster.
  • the at least one sliding bearing of the adjusting device may have friction and / or wear-reducing coatings. It is also possible to incorporate lubricants in lubricating materials or to impregnate the corresponding materials with lubricants, so that particularly advantageous lubricant compounds are given by friction.
  • Fig. 5 shows a principle possible, unclaimed design of a control device 1 of a camshaft adjuster an internal combustion engine.
  • Fig. 5 shows a principle possible, unclaimed design of a control device 1 of a camshaft adjuster an internal combustion engine.
  • the same reference numerals for basically equivalent parts in connection with Fig. 5 on the one hand and in the embodiments according to the Fig. 1 to 4 used on the other hand.
  • the adjusting devices 1 shown in the various figures have in common that they have a housing 2, wherein a toothed drive wheel 3 is an integral part of the housing 2 or fixedly connected to housing components.
  • the drive wheel 3 is driven by a not shown traction means, that is, a chain or a toothed belt in a conventional manner by the crankshaft of an internal combustion engine.
  • a drive of the adjusting device 1 via gears and / or a king shaft comes into consideration.
  • a control gear 4 which is designed as a three-shaft gear, namely wave gear.
  • an actuating shaft 5 is provided, which is actuated by an electric motor, not shown, of the camshaft adjuster. As long as the shaft of the electric motor with the speed rotates the camshaft also not shown, the internal combustion engine, the phase relation between the camshaft and crankshaft of the internal combustion engine remains constant.
  • the actuating gear 4 is a high-gear transmission, wherein a speed deviation between the camshaft and the actuating shaft 5 leads to a relatively small change in the phase relation between the camshaft and crankshaft.
  • the output member 10 is designed in each of the outlined designs - both in the claimed and in the unclaimed cases - as a stop disc, which is connectable to the camshaft and limits the displacement of the camshaft.
  • the output element 10 always fulfills a dual function.
  • the sliding bearing 8 is arranged axially between the adjusting gear 4 and the drive wheel 3, which contributes significantly to the low lever arm length lk.
  • the sliding bearing 8 is between the output member 10 and a formed overall with the reference numeral 11 designated gear component, which includes the toothed drive wheel 3.
  • the front side of the output element 10 arranged flange 9 is rotatably connected both to the output ring gear 7 and the output member 10 and projects beyond the output member 10 in the radial direction, based on the common axis of rotation of the output ring gear 7, output element 10 and camshaft.
  • the output ring gear 7 in turn is connected to the circumference of the flange 9 with this, that is arranged radially outside of the flange 9.
  • FIGS. 2 and 3 show different variants of the transmission component 11, which in each camshaft adjuster 1 after Fig. 1 are usable.
  • Fig. 2 are on the inner circumference of the transmission component 11, which forms a bearing surface of the sliding bearing 8
  • axial grooves 12 can be seen.
  • Fig. 3 no axially extending grooves in the sliding bearing 8 available.
  • there is a circumferentially extending groove 13 in the region of the sliding bearing 8 on the inner circumference of the transmission component 11 is present.
  • This groove 13 does not favor as much as the axial grooves 12 in the case of Fig. 2 -
  • the distribution of lubricant but also facilitates the processing of the reduced by the circumferential groove 13 bearing surface of the sliding bearing. 8
  • Fig. 4 a further developed embodiment of an adjusting device 1 of a camshaft adjuster.
  • the slide bearing 8 which is located axially between the drive wheel 3 and the actuating gear 4, namely, wave gear
  • another sliding bearing 14 can be seen.
  • the sliding bearing 14 is the output ring gear 7 - comparable to the design Fig. 5 - Slidably mounted in the housing 2.
  • a particularly stable double slide bearing 8,14 is given.
  • the extent of the first primary slide bearing 8 in the axial direction of the actuator 1 is greater than the extension of the second, second slide bearing 14 measured in the same direction.
  • the diagram after Fig. 6 refers to a comparison between the actuator 1 after Fig. 1 and the in Fig. 5 sketched design.
  • K denotes the chain force which acts in the traction means driving the drive wheel 3, ie the chain.
  • L bearing friction in the sliding bearing 8 is designated.
  • the upper, dotted line in Fig. 6 refers to the unclaimed design Fig. 5 ; the lower dashed line on the embodiment according to Fig. 1 , Well recognizable is the reduced bearing friction of the embodiment according to Fig. 1 in all operating states.
  • the same relationship applies to a comparison between the embodiment according to Fig. 4 and the design after Fig. 5 ,

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)
EP16770885.8A 2015-09-10 2016-09-07 Nockenwellenversteller Active EP3347578B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015217296 2015-09-10
PCT/DE2016/200420 WO2017041801A1 (de) 2015-09-10 2016-09-07 Nockenwellenversteller

Publications (2)

Publication Number Publication Date
EP3347578A1 EP3347578A1 (de) 2018-07-18
EP3347578B1 true EP3347578B1 (de) 2019-06-19

Family

ID=57003300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16770885.8A Active EP3347578B1 (de) 2015-09-10 2016-09-07 Nockenwellenversteller

Country Status (5)

Country Link
EP (1) EP3347578B1 (zh)
JP (1) JP6800959B2 (zh)
CN (1) CN108026799B (zh)
DE (1) DE102016216927A1 (zh)
WO (1) WO2017041801A1 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10287932B2 (en) * 2016-09-19 2019-05-14 Schaeffler Technologies AG & Co. KG Camshaft phasing system including idler gear phaser for internal combustion engines
DE102017115882B4 (de) 2017-07-14 2023-11-09 Schaeffler Technologies AG & Co. KG Elektrischer Nockenwellenversteller zur variablen Einstellung der Ventilsteuerzeiten einer Brennkraftmaschine
DE102017128423A1 (de) 2017-11-30 2019-06-06 Schaeffler Technologies AG & Co. KG Wellgetriebe
DE102018128930B4 (de) 2018-11-19 2023-06-29 Schaeffler Technologies AG & Co. KG Wellgetriebe, Verfahren zur Herstellung eines Wellgetriebes und Nockenwellenversteller mit einem Wellgetriebe

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7089897B2 (en) * 2002-07-11 2006-08-15 Ina-Schaeffler Kg Electrically driven camshaft adjuster
DE102004038681B4 (de) 2004-08-10 2017-06-01 Schaeffler Technologies AG & Co. KG Elektromotorischer Nockenwellenversteller
JP4390078B2 (ja) * 2005-09-05 2009-12-24 株式会社デンソー バルブタイミング調整装置
JP4900286B2 (ja) * 2008-03-04 2012-03-21 株式会社デンソー バルブタイミング調整装置
JP5288311B2 (ja) * 2009-04-03 2013-09-11 Ｎｔｎ株式会社 可変バルブタイミング装置
US8555836B2 (en) * 2010-12-10 2013-10-15 Delphi Technologies, Inc. Electric drive camshaft phaser with torque rate limit at travel stops
US8516983B2 (en) 2011-09-30 2013-08-27 Delphi Technologies, Inc. Harmonic drive camshaft phaser with a harmonic drive ring to prevent ball cage deflection
JP2013167181A (ja) * 2012-02-15 2013-08-29 Hitachi Automotive Systems Ltd 内燃機関のバルブタイミング制御装置
JP2014074388A (ja) * 2012-10-05 2014-04-24 Denso Corp バルブタイミング調整装置
WO2014092973A1 (en) * 2012-12-10 2014-06-19 Borgwarner Inc. Electric motor driven simple planetary cam phaser
JP5862696B2 (ja) * 2014-01-29 2016-02-16 株式会社日本自動車部品総合研究所 バルブタイミング調整装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN108026799A (zh) 2018-05-11
DE102016216927A1 (de) 2017-03-16
CN108026799B (zh) 2020-06-30
WO2017041801A1 (de) 2017-03-16
EP3347578A1 (de) 2018-07-18
JP2018530695A (ja) 2018-10-18
JP6800959B2 (ja) 2020-12-16

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