WO2015162119A1 - Dispositif d'actionnement d'une soupape d'un moteur à combustion interne - Google Patents

Dispositif d'actionnement d'une soupape d'un moteur à combustion interne Download PDF

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Publication number
WO2015162119A1
WO2015162119A1 PCT/EP2015/058575 EP2015058575W WO2015162119A1 WO 2015162119 A1 WO2015162119 A1 WO 2015162119A1 EP 2015058575 W EP2015058575 W EP 2015058575W WO 2015162119 A1 WO2015162119 A1 WO 2015162119A1
Authority
WO
WIPO (PCT)
Prior art keywords
actuating device
cam
valve actuating
camshaft
valve
Prior art date
Application number
PCT/EP2015/058575
Other languages
German (de)
English (en)
Inventor
Jürgen GELTER
Andreas Zurk
Original Assignee
Avl List 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 Avl List Gmbh filed Critical Avl List Gmbh
Priority to JP2016564261A priority Critical patent/JP6656169B2/ja
Priority to DE112015001383.0T priority patent/DE112015001383A5/de
Publication of WO2015162119A1 publication Critical patent/WO2015162119A1/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
    • 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
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/146—Push-rods
    • 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
    • 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
    • F01L2305/00—Valve arrangements comprising rollers

Definitions

  • the invention relates to a valve actuating device for an internal combustion engine having at least one cylinder with at least one gas exchange valve, which is actuated via a camshaft, wherein the camshaft has at least one axially displaceable over a Ventilhubumschalt issued rotatable cam piece with at least two different cam contours, wherein the Ventilhubumschalt issued at least one of the Has camshaft axis spaced axially displaceable encoder part, which cooperates with a connected to the cam piece driver part.
  • a control device for charge exchange valves in which a cam carrier rotatably and axially displaceably arranged on a basic shaft.
  • the cam carrier consists of a tubular support on which at least one cam is arranged, in which emerge from a common base circle axially offset several different cam tracks.
  • DE 10 2011 003 024 AI describes a sliding cam system with sliding cam, which are arranged axially displaceably on a camshaft of a reciprocating internal combustion engine.
  • a stationary electromagnetic adjustment device having an actuator pin is provided, wherein the actuator pin engages in displacement grooves, which are in operative connection with the sliding cams.
  • the sliding cam designed as Reibarret ist locking device is provided.
  • a valve drive for internal combustion engines for the actuation of gas exchange valves is known, which is constructed from a lever axis, with at least one lever mounted thereon and from an adjusting shaft.
  • a sleeve with a guideway is rotatably mounted, but axially displaceable, wherein the lever is supported directly or indirectly in the guideway.
  • a housing-fixed engagement element engages permanently in the guideway and supports the sleeve relative to the housing.
  • Another engagement element engages radially along the guideway to the housing-fixed engagement element offset permanently into the guideway and is firmly connected to the lever. The switching between different cams of a cam group takes place by turning the adjusting shaft.
  • DE 10 2011 101 868 AI discloses a device for variation of the charge- changeover valve stroke in an internal combustion engine, wherein for the axial displacement of a cam carrier on the camshaft a parallel to the camshaft arranged adjusting shaft is provided.
  • a first transmission element On the adjusting shaft is rotationally fixed, but axially adjustable, a first transmission element arranged, which has a guideway.
  • a first engagement element Upon rotation of the adjusting a first engagement element is guided along the guide track, which is fixedly connected to the housing of the internal combustion engine.
  • a second engagement element is guided, which is arranged for axial displacement of the cam carrier on a second transmission element.
  • the object of the invention is to enable a simple and compact switching of the valve.
  • both the transmitter part, and the driver part are rotationally symmetrical, wherein the transmitter part is mounted rotatably and displaceably about an axis arranged parallel to the camshaft axis.
  • the transmitter part can thereby be displaced axially by a displacement device, which in turn displaces the driver part together with the cam piece along the camshaft, wherein preferably the displacement device has at least one curved track element and at least one actuating pin interacting with the curved track element.
  • a particularly simple switching of the valve lift can be achieved if the transmitter part has on a first end face a first curved track element, preferably formed by a screw thread, wherein a see a rest position and an actuating position displaceable in a stationary part mounted first actuating pin in the operating position in the region of the first curved path is extendable.
  • the transmitter part on a second end face facing away from the first end face a - preferably formed by a screw - have second curved path element, wherein a slidably mounted between a rest position and an actuating position in a stationary part second actuating pin in the operating position in the region of the second Curved track is extendable.
  • Each curved path element extends over an angle of at most 360 ° about the axis of rotation of the encoder part.
  • a simple adjustment can be achieved if the first curved track element and the second curved track element have opposite slopes.
  • at least one actuating pin is arranged to be radially displaceable in the axis of the rotary member, and is hydraulically deflected against a return force formed by a return element, preferably a spring, wherein preferably the rest position is defined by the restoring force.
  • the transmitter part and the driver part are advantageously rotationally coupled.
  • rotationally coupled means that rotary movements of the transmitter part are transmitted to the driver part and vice versa. This rotational coupling can be done particularly easily by the transmitter part has a first gear and the driver part has a second gear, wherein the first and second gear are in meshing engagement.
  • An axial coupling between the transmitter part and the driver part is achieved in a simple manner if the transmitter part or the driver part in the region of its end faces has two axially spaced thrust washers, which span a space, the driver part or transmitter part in this space between the two thrust washers intervenes.
  • Axial coupling means in the context of the present disclosure, that is moved with movements of the encoder part in the axial direction of the driver part, and vice versa.
  • the thrust washers are arranged, for example, on the transmitter part, whereby the transmitter part by means of the thrust washers comprises the driver part like a fork.
  • a kinematic reversal is possible by the thrust washers are arranged on the driver part.
  • the thrust washers are arranged on both sides of the first and second gear, wherein the diameter of the thrust washers are larger than the Zahnfuß Vietnamese bemesser, preferably larger than the Zahnkopf Vietnamese bemesser, the adjacent first and second gear.
  • the thrust washers act in an adjustment on the flanks of the engaging gear and thus displace the driver part, which is preferably connected via a press fit with the cam piece.
  • the cam piece can be locked by a locking device in at least one, preferably each cam contour position, wherein at least one, preferably each cam contour position can be defined by a stop, which is formed for example by the camshaft.
  • the displacement is initiated by the extension of the first or second actuating pin.
  • the corresponding first or second actuation pin comes into contact with the first or second cam track.
  • the rotation of the camshaft is transmitted to the transmitter via the two gears. Trained as a helical cam track is located on the stationary mounted actuating pin, by the rotational movement of the encoder part and the cam track of the encoder member is deflected axially.
  • the thrust washers the axial deflection of the encoder part is transmitted to the driver part and thus axially displaced the cam piece on the camshaft, which can be exchanged between two juxtaposed cam contours for the actuation of the respective gas exchange valve.
  • Fig. 1 a valve actuating device according to the invention in a
  • FIG. 2 shows the valve actuating device in a longitudinal section.
  • FIG. 3 shows a transmitter part together with axis in a plan view in a first embodiment
  • FIG. 4 shows this transmitter part together with the axis in a section along the line IV-IV in FIG. 3;
  • FIG. 5 shows a transmitter part together with axis in a plan view in a first embodiment
  • valve actuating device 1 for a reciprocating internal combustion engine, not shown, wherein the valve actuating Device 1 has a camshaft 2 rotatable about a camshaft axis 2a with a cam piece 3, which is non-rotatably connected to the camshaft 2, but arranged axially displaceably on this.
  • the cam piece 3 has at least two axially arranged side by side, different cam contours 4, 5, wherein each one of the two cam contours 4, 5 with a cam follower 6 - for example, a roller tappet - for actuating a gas exchange valve not shown is engaged.
  • Ventilhub- switching device 7 For switching between the two cam contours 4, 5 a Ventilhub- switching device 7 is provided, which has a transmitter part 8 and a fixedly connected to the cam piece 3 driver part 9, wherein Gebgeber part 8 and driver part 9 are rotationally symmetrical.
  • the transmitter part 8 has a first gearwheel 10, the driver part 9 has a second gearwheel 11, wherein the transmitter part 8 together with the first gearwheel 10 is mounted rotatably and axially displaceably mounted on a stationary axle 12.
  • the first gear 10 and the second gear 11 are meshed with each other and are thereby rotationally coupled.
  • a thrust washer 13, 14 is arranged, wherein the thrust washers 13, 14 directly adjoin the first gear 10.
  • the diameter D of the thrust washers 13, 14, which are the same size in the embodiment (but may also be different), are greater than the Zahnfuß réelle malmesser d f , in particular larger than the Zahnkopf Vietnamese bemesser d k of the first gear 10.
  • the transmitter part 8 can be moved axially by a displacement device 30, which in turn also the driver part 9 together with the cam piece 3 is moved along the camshaft 2.
  • the transmitter part 8 has a first curved track element 16 formed by a screw thread.
  • a first actuating pin 17 is mounted radially displaceable in the axis 12 between a rest position A and an actuating position B. In the rest position A is the first actuating pin 17 entirely within the axis 12, wherein it is held by a likewise completely disposed within the axis 12 first return element in the form of a first return spring 18 in this rest position A.
  • the transmitter part 8 in the region of its second end face 8b on the outside of the thrust washer 14 on a likewise formed by a screw second cam member 19.
  • cam member 16, 19 is understood in the present disclosure, an element with a running on the outside of the axis 12 guideway, starting from a near the first gear 10 arranged starting point in the axial (axis of rotation 8 'of the axis 12), from the gear 10th upward direction around the axis 12 winds up to an end point further from the first gear 19.
  • the guideway can have a constant, but also a changing pitch. During a screw thread, the guideway winds at a constant pitch around the axis 12.
  • a second actuating pin 20 is also mounted radially displaceable in the axis 12 between a rest position A and an actuating position B.
  • the rest position A is the second actuating pin 20 entirely within the axis, being held by a completely disposed within the axis 12 second return element in the form of a second return spring 21 in this rest position A.
  • the first curved path element 16 and the second curved path element 19 are fixedly connected to the transmitter part 8 or its thrust washers 13, 14.
  • the screw threads of the first curved track element 16 and of the second curved track element 19 have opposing pitches, as shown in FIGS. 3 to FIG. 6 is recognizable.
  • Each of the two curved path elements 16, 19 extends over an angle ⁇ of at most 360 °, about the axis of rotation 8 'of the encoder part 8.
  • FIGS. 3 and 4 show an embodiment in which the rising curved path elements 16, 19 are approximately extend around half the circumference - the angle ß about the axis of rotation 8 'is thus about 180 °.
  • the curved path elements 16, 19 are each formed by a full flight and thus extended by an angle ß of about 360 ° about the axis of rotation 8 '.
  • Each actuating pin 17, 20 is adjacent to a pressure chamber 22, 23, which is acted upon by oil.
  • the idle state A of an actuating pin 17, 20 is defined by the pressure-free state of the respective pressure chamber 22, 23.
  • the corresponding first actuating pin 17 and second actuating pin 20 is pushed from the rest position A to the actuating position B radially outward, wherein it projects into the region of the corresponding first and second curved path element 16, 19.
  • the term "area of the first curved track element 16" or “second curved track element 19” is understood to mean that section in the axial direction along the axis 12 which is swept by the respective curved track element 16, 19 during (at least) one complete rotation of the encoder part 8 about the axis of rotation 8 '.
  • the first curved path element 16 or the second curved path element 19 are pressed against the corresponding actuating pin 17, 20. Since the transmitter part 8 is mounted axially displaceably on the axis 12, the transmitter part 8 is axially displaced by the interaction of actuating pin 17, 20 and cam member 16, 19.
  • First actuating pin 17 and second actuating pin 20 are pressed against the same, which is in each case one of the two actuating pins 17, 20 in the rest position A and the other in the operating position B.
  • a locking device 24 which has at least one spring clip 25 which engages elastically in grooves 26, 26 'of the cam piece 3.
  • the cam contour of the cam piece 3 are additionally defined by stops 27, 28 of the camshaft 2, which are arranged on opposite sides of the driver part 9 and the cam piece 3. In the area of at least one of these stops 27, 28, the spring clip 25 is fixed to the camshaft 2.
  • the displacement of the cam piece 3 is initiated by the extension of the first actuating pin 17 or the second actuating pin 20.
  • the corresponding first or second actuating pin 17, 20 comes into contact with the first and second curved path element 16, 19.
  • the rotation of the camshaft 2 is transmitted via the two gears 10, 11 to the transmitter part 8.
  • the cam track 16 or 19 is located on the respective stationary mounted actuating pin 17, 20, by the rotational movement of the encoder part 8 and the cam track 16, 19, the transmitter part 8 is axially deflected.

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)

Abstract

L'invention concerne un dispositif d'actionnement (1) d'une soupape d'un moteur à combustion interne à pistons alternatifs comportant au moins une soupape d'échange de gaz par cylindre qui peut être actionnée par un arbre à cames (2), l'arbre à cames (2) présentant au moins un élément came (3) fixe en rotation et déplaçable axialement par l'intermédiaire d'un dispositif (7) d'inversion de la course de la soupape avec au moins deux contours (4, 5) de came différents, le dispositif (7) d'inversion de la course de la soupape présentant au moins un élément émetteur (8) déplaçable axialement à distance de l'axe (2a) de l'arbre à cames et coopérant avec un élément d'entraînement (9) relié à l'élément came (3). On peut obtenir une inversion simple et compacte de la course de la soupape si à la fois l'élément émetteur (8) et l'élément d'entraînement (9) sont à symétrie de rotation, l'élément émetteur (8) étant monté rotatif et déplaçable sur un axe (12) agencé parallèlement à l'axe (2a) de l'arbre à cames.
PCT/EP2015/058575 2014-04-24 2015-04-21 Dispositif d'actionnement d'une soupape d'un moteur à combustion interne WO2015162119A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2016564261A JP6656169B2 (ja) 2014-04-24 2015-04-21 内燃機関用のバルブ作動装置
DE112015001383.0T DE112015001383A5 (de) 2014-04-24 2015-04-21 Ventilbetätigungseinrichtung für eine Brennkraftmaschine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50304/2014 2014-04-24
ATA50304/2014A AT515734B1 (de) 2014-04-24 2014-04-24 Ventilbetätigungseinrichtung für eine brennkraftmaschine

Publications (1)

Publication Number Publication Date
WO2015162119A1 true WO2015162119A1 (fr) 2015-10-29

Family

ID=53015780

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/058575 WO2015162119A1 (fr) 2014-04-24 2015-04-21 Dispositif d'actionnement d'une soupape d'un moteur à combustion interne

Country Status (4)

Country Link
JP (1) JP6656169B2 (fr)
AT (1) AT515734B1 (fr)
DE (1) DE112015001383A5 (fr)
WO (1) WO2015162119A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016113054A1 (de) * 2016-07-15 2018-01-18 Man Diesel & Turbo Se Brennkraftmaschine und Baukastensystem für einen Ventiltrieb einer Brennkraftmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06229215A (ja) * 1993-02-02 1994-08-16 Mazda Motor Corp エンジンのバルブタイミング制御装置
EP2196638A1 (fr) * 2008-12-10 2010-06-16 IAV GmbH Ingenieurgesellschaft Auto und Verkehr Commande de soupape destinée à actionner des soupapes d'échange des gaz de moteurs à combustion interne
DE102009057691A1 (de) * 2009-12-07 2011-06-09 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Ventiltrieb zur Betätigung von Gaswechselventilen von Brennkraftmaschinen
DE102013203745A1 (de) * 2012-03-06 2013-09-12 Denso Corporation Ventilhubanpassungsvorrichtung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3402853B2 (ja) * 1995-04-12 2003-05-06 ヤマハ発動機株式会社 エンジンの動弁装置
JPH11219056A (ja) * 1997-10-23 1999-08-10 Ricoh Co Ltd 定着装置
DE202007013390U1 (de) * 2007-01-26 2008-02-07 Schaeffler Kg Verstellvorrichtung zur axialen Verstellung einer Nockenwelle mittels eines Verstellaktuators
DE102008061440B3 (de) * 2008-12-10 2010-06-02 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Ventiltrieb zur Betätigung von Gaswechselventilen von Brennkraftmaschinen
DE102010021903A1 (de) * 2010-05-29 2011-12-01 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Ventiltrieb zur Betätigung von Gaswechselventilen von Brennkraftmaschinen
DE102011101868B4 (de) * 2011-05-16 2013-02-07 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Vorrichtung zur Variation des Ladungswechselventilhubes bei einer Verbrennungskraftmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06229215A (ja) * 1993-02-02 1994-08-16 Mazda Motor Corp エンジンのバルブタイミング制御装置
EP2196638A1 (fr) * 2008-12-10 2010-06-16 IAV GmbH Ingenieurgesellschaft Auto und Verkehr Commande de soupape destinée à actionner des soupapes d'échange des gaz de moteurs à combustion interne
DE102009057691A1 (de) * 2009-12-07 2011-06-09 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Ventiltrieb zur Betätigung von Gaswechselventilen von Brennkraftmaschinen
DE102013203745A1 (de) * 2012-03-06 2013-09-12 Denso Corporation Ventilhubanpassungsvorrichtung

Also Published As

Publication number Publication date
AT515734B1 (de) 2016-05-15
JP6656169B2 (ja) 2020-03-04
DE112015001383A5 (de) 2017-01-05
JP2017514065A (ja) 2017-06-01
AT515734A1 (de) 2015-11-15

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