EP2513434B1 - Nockeneinheit für eine gebaute nockenwelle - Google Patents

Nockeneinheit für eine gebaute nockenwelle Download PDF

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Publication number
EP2513434B1
EP2513434B1 EP10784449.0A EP10784449A EP2513434B1 EP 2513434 B1 EP2513434 B1 EP 2513434B1 EP 10784449 A EP10784449 A EP 10784449A EP 2513434 B1 EP2513434 B1 EP 2513434B1
Authority
EP
European Patent Office
Prior art keywords
main body
camshaft
cam
bearing seat
cam unit
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
EP10784449.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2513434A1 (de
Inventor
Peter Wiesner
Manfred Muster
Thomas Binder
Jonathan Heywood
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
Priority to PL10784449T priority Critical patent/PL2513434T3/pl
Publication of EP2513434A1 publication Critical patent/EP2513434A1/de
Application granted granted Critical
Publication of EP2513434B1 publication Critical patent/EP2513434B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49293—Camshaft making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams

Definitions

  • the invention relates to a (built) cam unit for the rotationally fixed and axially displaceable arrangement on a camshaft main body of a (built or to be built) camshaft.
  • the invention comprises a camshaft with a camshaft main body and a rotationally fixed and axially displaceably arranged on the camshaft main body cam unit according to the main claim.
  • the invention comprises a camshaft module which carries in an at least partially closed bearing device a built camshaft with a drivable camshaft main body and with at least one on the camshaft main body axially displaceable and rotationally fixed cam unit according to the main claim.
  • a valvetrain for an internal combustion engine which has at least one camshaft, on the rotatably and axially displaceable at least one cam carrier is arranged.
  • means for applying an axial clamping force are formed between the camshaft and the at least one cam carrier, by which the at least one cam carrier is fixed axially in the bearing receptacle.
  • the proposed cam carrier has at least one cam on which at least two different cam tracks are formed, and is surrounded for storage by a cylinder head fixed camshaft bearing.
  • the proposed cam carrier consists essentially of a total of three components, an axial base body with integrated, double-sided cams and each of a pressed-on at both free ends of the body raceway profile.
  • the present invention has for its object to provide a cam unit (hereinafter also referred to as built cam unit), which on the one hand, the cam unit, and in corresponding developments, a such a (built) cam unit bearing (built) camshaft and a corresponding one such To optimize (built) camshaft camshaft module in terms of manufacturing costs and the functional requirements of such a (built) cam unit.
  • built cam unit a cam unit bearing (built) camshaft and a corresponding one such to optimize (built) camshaft camshaft module in terms of manufacturing costs and the functional requirements of such a (built) cam unit.
  • a cam unit (further) into individual prefabricated individual components in such a way that these individual components can be manufactured in a simplified manner and optimally designed in terms of their technical requirements, in particular by different material properties.
  • the modular design of such a "built” cam unit for a "built” camshaft, the assembly of a camshaft module with such a built (built) camshaft with regard to the installation of the camshaft in the at least partially closed bearing mount (bearing block or bearing or Leadframe or the like) of the camshaft module can be simplified.
  • this object is achieved by the totality of the features of claim 1.
  • a cam unit in the sense of a so-called “switchable cam” with at least two, a common cam follower different cam track profiles
  • the cam unit at least one tubular sleeve body and at least one on the sleeve body rotating and non-displaceably arranged cam member has.
  • the sleeve body as well as the at least one cam element are designed as separately produced individual parts.
  • the cam element is designed in several parts and has at least two individual, axially adjacent arranged and a common cam follower associated, disc elements with different cam track profiles (circumferential profiles).
  • the cam element may be formed in one piece, wherein it is circumferentially contoured such that axially next to each other a plurality of cam track profiles are formed.
  • a cam element is understood as meaning both a one-piece cam element with a plurality of cam track profiles, and also each individual wheel body of a multi-part cam element is referred to as a cam element.
  • the individual components such as sleeve body, cam element (s) and raceway elements can be made of different materials or different material compositions of the same material.
  • the individual components can be individually improved by further separate processing of the same in their properties and individually adapted and optimized with regard to their respective function.
  • a made of a simple structural steel eg St52-3, 40MnB5, 26MnB5, C60, CF53 od
  • a basic body made of a forged special and (eg inductively) hardened steel or an existing of a sintered metal cam element.
  • a track element to be connected to the sleeve main body can also be produced from a correspondingly further treated (eg nitrided) steel or from a sintered metal and with the sleeve main body consisting of another steel (or consisting of a different material or of a different material composition) get connected.
  • a correspondingly further treated (eg nitrided) steel or from a sintered metal and with the sleeve main body consisting of another steel (or consisting of a different material or of a different material composition) get connected.
  • the raceway elements manufactured separately and the sleeve body or bodies provided with an internal toothing are made of a conventional structural steel.
  • the cam members are preferably forged according to a standard manufacturing process for built camshafts.
  • the raceway elements are advantageously (inductively) hardened and in particular nitrated, while the forging cams can be hardened in a further processing step, in particular inductively or otherwise.
  • the connection between the separately produced separately and to be assembled to a cam unit components can be done via a press connection, a positive connection, a solder, glued or welded connection or any combination of said connection options.
  • camshaft main body which may be wholly or partially soft, hardened and / or nitrided
  • cam unit which also completely or partially soft, hardened and / or may be nitrided
  • camshaft module having a bearing device with bearing mounts for rotatably supporting the assembled camshaft, the assembled camshaft being of the type described above.
  • a bearing receptacle / mounting is understood that is formed partially or fully closed in such a way that an assembly of the camshaft base body or the camshaft is possible only by lateral insertion of the camshaft main body. Insertion of the camshaft, transversely to the axis of rotation thereof, into a corresponding bearing receptacle is not possible with such bearing receptacles.
  • the sleeve body of the cam unit is characterized in that, starting from one of its two free ends, it is at least partially adapted in its outer diameter to the inner diameter of the bearing device such that lateral insertion of the sleeve body into the closed bearing receptacle is ensured.
  • the cam unit is at least partially adapted in its outer diameter to the inner diameter of the bearing device such that a sliding bearing between the sleeve main body and bearing receptacle is ensured.
  • Fig. 1 shows a cam unit 1 with a tubular sleeve body 11 at its two free ends (end) in each case a raceway element 13 and on both sides inwardly adjacent each two individual disc elements (hereinafter referred to as cam elements 12) carries.
  • cam elements 12 both the sleeve main body 11 and the individual cam elements 12 and the two-sided raceway elements 13 are manufactured as individual separate components.
  • the individual components are assembled within different assembly steps to form a cam unit according to the invention (which is also referred to as a so-called "switchable cam" with different cam tracks).
  • cam member 12 In the fully assembled cam unit 1, the individual components, such as sleeve body 11, cam member 12 and raceway member 13 are interconnected such that between the sleeve body 11 and the components to be fastened thereto 12, 13, a rotational and non-displacement connection is realized.
  • the arranged at one free end or this associated with different cam elements 11 have different cam tracks or career profiles.
  • cam member 12 for example, as a cam member 12 for cylinder deactivation with the base circle diameter corresponding circumferentially constant (zero) stroke formed while the axially right next thereto arranged cam member 12 has a correspondingly designed stroke for controlled, temporary opening of gas exchange valves of an internal combustion engine has.
  • the sleeve main body 11 and the camshaft main body 2 at least partially according to each corresponding profiles (in particular multi-tooth profiles), so ensuring a rotationally fixed and axially displaceable mounting of the cam unit on the camshaft main body 2 is.
  • raceway elements 13 arranged radially to the sleeve body 11 (and fixedly arranged in the engine) pin elements not shown together, so when engaging such a pin member with a track a corresponding raceway element 13, the cam unit 1 on the camshaft base body 2 is displaceable in the corresponding axial direction.
  • On the sleeve body 11 are on both sides only a limited number of functional elements can be arranged so that in the central region of the sleeve main body 11 of this mounted in an internal combustion engine side bearing mount LA is axially displaceable or can be arranged.
  • the sleeve main body 11 preferably has circumferentially extending teeth or grooves on its inner surface for engaging a ball element mounted in the camshaft main body 2 in the radial direction against a spring force.
  • the cam unit 1 in different axial positions, in which the cam unit 1 each with either its left cam member 12 or with its axially right next to it arranged right cam member 12 with a corresponding cam follower (not shown) for actuating inlet or cooperates on the outlet side to be actuated gas exchange valves, temporarily fixed and lifted by a force acting axially on the cam unit force.
  • Fig. 2a - 2d the assembly of the cam unit 1 according to the invention is illustrated in a partially or fully enclosed bearing receptacle for mounting the assembled camshaft.
  • Fig. 2a is a first embodiment of a cam unit 1 pre-assembled from individually prefabricated components and provided for mounting in a circumferentially closed bearing receptacle LA.
  • illustrated cam unit 1 can already be a fully assembled cam unit 1 to be inserted into bearing receptacle LA.
  • the illustrated cam unit 1 merely represents a preassembled semifinished product.
  • the cam unit 1 has a raceway element 13 on its sleeve main body 11 at its free end on the left-hand side and two on the right-hand side individual cam elements 12 with different cam track profiles.
  • the individual functional elements 12, 13 are arranged on the sleeve main body 11 in a non-positive or frictionally engaged manner.
  • the pre-assembled semi-finished product is pushed laterally into a circumferentially closed bearing receptacle LA.
  • the sleeve body 11 of the cam unit 1 at least partially an outer diameter d NE and the bearing receptacle LA adapted thereto an inner diameter d LA , that a lateral insertion of the sleeve body 11 (and advantageously a sliding bearing between the two parts) in the (the) bearing LA is guaranteed.
  • the laterally inserted cam unit 1 is equipped at its free end in particular mirror-symmetrical to the already pre-assembled side with corresponding functional elements 12, 13.
  • Fig. 2d the finished assembled cam module in sections using the example of a fully assembled bearing LA shown.
  • the camshaft base body 2 is already inserted axially laterally into the preassembled sleeve body 11 and arranged axially fixed with its acting in the radial direction ball spring element in a corresponding annular inner groove of the sleeve body 11.
  • the described assembly process for mounting a cam unit 1 according to the invention in a closed bearing receptacle LA can be repeated as required for other bearing locations LA accordingly.
  • the insertion of the camshaft main body 2 according to Fig. 2d take place after mounting another cam unit 1 in a corresponding bearing mount LA.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
EP10784449.0A 2009-12-18 2010-11-11 Nockeneinheit für eine gebaute nockenwelle Active EP2513434B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10784449T PL2513434T3 (pl) 2009-12-18 2010-11-11 Jednostka krzywki do składanego wału krzywkowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009059712A DE102009059712A1 (de) 2009-12-18 2009-12-18 Nockeneinheit für eine gebaute Nockenwelle
PCT/EP2010/006885 WO2011072782A1 (de) 2009-12-18 2010-11-11 Nockeneinheit für eine gebaute nockenwelle

Publications (2)

Publication Number Publication Date
EP2513434A1 EP2513434A1 (de) 2012-10-24
EP2513434B1 true EP2513434B1 (de) 2015-01-07

Family

ID=43450278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10784449.0A Active EP2513434B1 (de) 2009-12-18 2010-11-11 Nockeneinheit für eine gebaute nockenwelle

Country Status (8)

Country Link
US (1) US8887681B2 (ja)
EP (1) EP2513434B1 (ja)
JP (1) JP2013514477A (ja)
CN (1) CN102652209B (ja)
DE (1) DE102009059712A1 (ja)
ES (1) ES2533534T3 (ja)
PL (1) PL2513434T3 (ja)
WO (1) WO2011072782A1 (ja)

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DE102017124671B4 (de) 2017-10-23 2020-04-23 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Montageverfahren und Vorrichtung zur Montage einer Nockenwelle sowie dadurch hergestelltes Nockenwellenmodul

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DE102017214297A1 (de) 2017-08-16 2019-02-21 Thyssenkrupp Ag Schiebeelement mit partiell gehärteter Rasterhebung
US11054000B2 (en) 2018-07-30 2021-07-06 Pi Tech Innovations Llc Polycrystalline diamond power transmission surfaces
US10760615B2 (en) 2018-07-30 2020-09-01 XR Downhole, LLC Polycrystalline diamond thrust bearing and element thereof
US11286985B2 (en) 2018-07-30 2022-03-29 Xr Downhole Llc Polycrystalline diamond bearings for rotating machinery with compliance
US11014759B2 (en) 2018-07-30 2021-05-25 XR Downhole, LLC Roller ball assembly with superhard elements
US11187040B2 (en) 2018-07-30 2021-11-30 XR Downhole, LLC Downhole drilling tool with a polycrystalline diamond bearing
US10738821B2 (en) 2018-07-30 2020-08-11 XR Downhole, LLC Polycrystalline diamond radial bearing
US11035407B2 (en) 2018-07-30 2021-06-15 XR Downhole, LLC Material treatments for diamond-on-diamond reactive material bearing engagements
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017124671B4 (de) 2017-10-23 2020-04-23 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Montageverfahren und Vorrichtung zur Montage einer Nockenwelle sowie dadurch hergestelltes Nockenwellenmodul

Also Published As

Publication number Publication date
US8887681B2 (en) 2014-11-18
CN102652209B (zh) 2016-01-20
DE102009059712A1 (de) 2011-09-22
WO2011072782A1 (de) 2011-06-23
CN102652209A (zh) 2012-08-29
US20130000442A1 (en) 2013-01-03
PL2513434T3 (pl) 2015-09-30
EP2513434A1 (de) 2012-10-24
ES2533534T3 (es) 2015-04-10
JP2013514477A (ja) 2013-04-25

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