EP3167168A1 - Mécanisme de distribution à commande mécanique - Google Patents

Mécanisme de distribution à commande mécanique

Info

Publication number
EP3167168A1
EP3167168A1 EP15718934.1A EP15718934A EP3167168A1 EP 3167168 A1 EP3167168 A1 EP 3167168A1 EP 15718934 A EP15718934 A EP 15718934A EP 3167168 A1 EP3167168 A1 EP 3167168A1
Authority
EP
European Patent Office
Prior art keywords
intermediate lever
roller member
arrangement
mechanically controllable
valve drive
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.)
Granted
Application number
EP15718934.1A
Other languages
German (de)
English (en)
Other versions
EP3167168B1 (fr
Inventor
Michael Breuer
Karsten Grimm
Stephan Schmitt
Sabine Siebrandt
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.)
Pierburg GmbH
Original Assignee
Pierburg 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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP3167168A1 publication Critical patent/EP3167168A1/fr
Application granted granted Critical
Publication of EP3167168B1 publication Critical patent/EP3167168B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F01L13/0063—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • 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
    • F01L1/18—Rocking arms or levers
    • 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
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-pivot rocking arms
    • 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
    • F01L13/0063—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F01L2013/0068—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
    • 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 mechanically controllable valve train with a gas exchange valve, wherein the gas exchange valve is assigned a transmission arrangement, wherein the transmission arrangement comprises an intermediate lever arrangement and a finger lever arrangement, wherein an intermediate lever of the intermediate lever arrangement a working curve for operative connection with a towing lift! the drag lever assembly, wherein the intermediate lever comprises a first roller member, which is in operative connection with a circumferential contour of a camshaft and wherein the intermediate lever comprises a second roller member which is rotatably mounted on an axis, such that the second roller member is in operative connection with a VentilhubverstellISS in that different valve lift positions are adjustable, spring means being provided which act on the intermediate lever arrangement and wherein guide means are provided for the intermediate lever arrangement.
  • the object of the invention is therefore to provide a mechanically controllable valve train, which avoids the disadvantages mentioned above.
  • the guide means consist of a link on which acts at least one guide roller member which is provided in the region of the second roller member.
  • the guide roller member is the second roller member.
  • a common stationary contact roller is provided for guidance in the slide and for operative connection with the valve lift, whereby a significantly lower component complexity and design effort is made possible.
  • a reduced friction by integrally lower Rolling paths under load instead.
  • the moving hatch of the intermediate lever assembly is reduced in this way.
  • at least one separate guide roller member is mounted on the axis of the second roller member.
  • the axis of the second Rolienorgans is rigidly connected to the intermediate lever.
  • an active contour of the backdrop is formed as a circular path around the center of a third roller member of the Schiepphe els in Grund Vietnameseaniage the camshaft.
  • the Arbeltskurve the intermediate lever consists essentially of two sub-areas, a first portion which is formed as a circular path around the center of the axis of the second roller member and a second portion which is formed as a continuous elevation curve.
  • the spring means consist of a torsion spring member which rests with a first end against a cylinder housing part and acts with a second end on an abutment which is rigidly connected to the intermediate lever, such that a force is introduced into the intermediate lever, both pushes the guide roller to the backdrop, as well as the first roller presses on the camshaft.
  • FIGURE shows a schematic side view of a mechanically controllable valve drive according to the invention.
  • FIG. 1 shows a mechanically controllable valvetrain 2 according to the invention for an indicated gas exchange valve 4 with a transfer arrangement 5, which in the present embodiment has an intermediate lever arrangement 6 and a cam follower arrangement 8. Furthermore, a VentilhubverstellISSISS 10 in the form of a having a peripheral contour 9, which has a relation to a base circle 11 recessed eccentric region provided, which is driven by an actuator, not shown.
  • the intermediate lever assembly 6 has an intermediate lever 12, which has a first roller member 14, which is in operative connection with a peripheral contour 16 of a camshaft 18. Furthermore, the intermediate lever 12 has a second roller member 20, which is rotatably mounted on an axis 22 and is in operative connection with the valve lift adjusting device 10, so that in a known manner different valve lift positions of the gas exchange valve 4 are adjustable.
  • the intermediate lever 12 has a working curve 24, which is in known manner with a third roller member 26 of a drag lever 28 of the finger lever assembly 8 in operative connection.
  • the working curve 24 of the intermediate lever 12 in this case has essentially two partial areas 30, 32.
  • the first portion 30 is hereby formed as a circular path around the center of the axis 22 of the second roller member 20 as shown.
  • the second portion 32 is formed as a continuous elevation curve.
  • the second roller member 20 is formed in addition to its function as an attack surface for the Ventilhubverstell noticed 10 as a guide roller member, which serves as a guide means 36 for the intermediate lever 12 together with a link 34.
  • the guide means 36 may also be formed as separate guide roller members, such that then at least one guide roller member is arranged on the axis 22 adjacent to the second roller member 20, which on the slide 34th attacks.
  • the axis 22 is rigidly connected in the present embodiment with the intermediate lever 12, so that it is designed very torsionally rigid.
  • An action contour 38 of the guide 32 is formed n of the base circle of the peripheral contour 16 of the camshaft 18 as a circular path about the center of the third roller member 26 of the finger lever 28 of the finger lever assembly 8.
  • a torsion spring member 40 is provided which is mounted with a first end 42 in a cylinder housing part 43 and engages with a second end 44 on an abutment 46 which is rigidly connected to the intermediate lever 12. In this way, a force is introduced into the intermediate lever 12, which presses both the guide roller member 20 to the link 34 and the Ventilhubverstellelnuze 10, as well as the first roller 14 to the camshaft 18 presses.
  • Figure 1 shows the gas exchange valve 4 in a closed position, d. That is, the valve lift adjusting device 10 rests with its eccentric region of the circumferential contour 9 against the second roller member 20. The camshaft 18 abuts with the base circle 19 of the peripheral contour 16 on the first roller member 14, resulting in that the valve is closed.
  • FIG. 2 now shows the mechanically controllable valve drive 2 from FIG. 1 with the camshaft 18 rotated through 180 °, so that the eccentric region of the circumferential contour 16 rests in the maximum position on the first roller member 14. Due to the unchanged position of the Ventilhubverstell issued 10 the gas exchange valve 4 remains but still closed. Only the region of the portion 30 of the working contour 24 has shifted relative to the third roller member 26.
  • FIG. 3 now shows the valve drive 2, in which the valve lift adjusting device 10 is connected to the base circle 11 of the peripheral contour 9 abuts the second Rol! Enorgan 20 and consequently the roller member 20 deflects a maximum to the right.
  • the camshaft 18 rests here only with the base circle 19 on the first roller member 14, the gas exchange valve is closed in this position.
  • FIG. 4 now shows the maximum stroke of the gas exchange valve 4, the valve lift stiffening device 10 abutting the base circle 11 of the peripheral contour 9 on the second roller element 20 and the camshaft 18 abutting the eccentric region 16 on the first roller element 14.
  • the working contour 24 now comes with the outermost portion 32 in contact with the third Rolienorgan 26 and causes in this way the maximum stroke of the gas exchange valve. 4

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

L'invention concerne un mécanisme de distribution à commande mécanique, comportant une soupape d'échange de gaz (4) à laquelle est associé un dispositif de transmission (5). Le dispositif de transmission (5) présente un système de leviers intermédiaires (6) et un système de leviers oscillants (8), un levier intermédiaire (12) du système de levier intermédiaire (6) présente une came de travail (24) créant une liaison fonctionnelle avec un levier oscillant (28) du système de leviers oscillants (8), le levier intermédiaire (12) présente un premier élément rouleau (14) qui est en liaison fonctionnelle avec un contour périphérique (16) d'un arbre à cames (18), et le levier intermédiaire (12) présente un second élément rouleau (20) qui est monté de manière rotative sur un axe (22) de telle manière que le second élément rouleau (20) est en liaison fonctionnelle avec un dispositif de réglage (10) de la course de la soupape de telle sorte qu'il est possible de régler plusieurs positions de course de la soupape. Le dispositif comprend des moyens de type ressort qui viennent en prise avec le système de leviers intermédiaires (6) et des moyens de guidage du système de leviers intermédiaires, les moyens de guidage (36) étant composés d'une coulisse (34) avec laquelle vient en prise au moins un élément rouleau de guidage qui se trouve dans la zone du second élément rouleau (20).
EP15718934.1A 2014-07-09 2015-04-30 Mécanisme de distribution à commande mécanique Active EP3167168B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014109573.1A DE102014109573A1 (de) 2014-07-09 2014-07-09 Mechanisch steuerbarer Ventiltrieb
PCT/EP2015/059524 WO2016005071A1 (fr) 2014-07-09 2015-04-30 Mécanisme de distribution à commande mécanique

Publications (2)

Publication Number Publication Date
EP3167168A1 true EP3167168A1 (fr) 2017-05-17
EP3167168B1 EP3167168B1 (fr) 2019-09-25

Family

ID=53008529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15718934.1A Active EP3167168B1 (fr) 2014-07-09 2015-04-30 Mécanisme de distribution à commande mécanique

Country Status (5)

Country Link
US (1) US10851683B2 (fr)
EP (1) EP3167168B1 (fr)
CN (1) CN106489020B (fr)
DE (1) DE102014109573A1 (fr)
WO (1) WO2016005071A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016122179A1 (de) * 2016-11-18 2018-05-24 Pierburg Gmbh Mechanisch steuerbarer Ventiltrieb
DE102017124273A1 (de) * 2017-10-18 2019-04-18 Schaeffler Technologies AG & Co. KG Brennkraftmaschine mit OHV-Ventiltrieb

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10226300B4 (de) * 2002-06-10 2004-09-30 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Einrichtung zur variablen Betätigung von Ventilen mittels Nocken für Verbrennungsmotoren
DE20220138U1 (de) 2002-12-20 2004-04-29 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Ventiltrieb mit Nocken zur variablen Betätigung von Ventilen für Verbrennungsmotoren
DE10123186A1 (de) * 2001-05-12 2002-11-14 Bayerische Motoren Werke Ag Ventiltrieb-Vorrichtung zur variablen Hubverstellung eines Gaswechselventils einer Brennkraftmaschine
DE10235402A1 (de) * 2002-08-02 2004-02-12 Bayerische Motoren Werke Ag Schwenkhebel für einen hubvariablen Ventiltrieb
DE10235403A1 (de) 2002-08-02 2004-02-12 Bayerische Motoren Werke Ag Schwenkhebel für einen hubvariablen Ventiltrieb
DE102004003327A1 (de) 2004-01-22 2005-09-29 Entec Consulting Gmbh Vorrichtung zur variablen Ventilhubverstellung von Gaswechselventilen einer Verbrennungskraftmaschine
EP1961927A3 (fr) * 2003-03-29 2010-01-06 Hydraulik-Ring Gmbh Dispositif de levée variable de soupape pour le réglage de la levée des soupapes d'échange de gaz d'un moteur à combustion interne
DE102004040652A1 (de) * 2004-08-20 2006-02-23 Rolf Jung Vollvariabler fünfgliedriger Ventiltrieb einer Brennkraftmaschine
DE102004049538A1 (de) * 2004-10-10 2006-04-13 Rolf Jung Vollvariable Hubventilsteuerungen für Brennkraftmaschinen
DE102005035314B4 (de) * 2005-07-28 2013-03-14 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Ventiltrieb für Ladungswechselventile von Viertaktverbrennungsmotoren
JP4535973B2 (ja) * 2005-09-15 2010-09-01 株式会社オティックス 可変動弁機構
DE102010009399A1 (de) * 2010-02-26 2011-09-01 Schaeffler Technologies Gmbh & Co. Kg Schwenkhebel für einen hubvariablen Gaswechselventiltrieb
DE102012006982A1 (de) 2012-04-05 2013-10-10 Kolbenschmidt Pierburg Innovations Gmbh Mechanisch steuerbarer Ventiltrieb mit einem Gasauslassventil sowie mechanisch steuerbare Ventiltriebanordnung und Brennkraftmaschine

Also Published As

Publication number Publication date
DE102014109573A1 (de) 2016-01-14
CN106489020B (zh) 2019-10-01
US10851683B2 (en) 2020-12-01
WO2016005071A1 (fr) 2016-01-14
CN106489020A (zh) 2017-03-08
US20170198614A1 (en) 2017-07-13
EP3167168B1 (fr) 2019-09-25

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