EP1881165A2 - Commande de soupape embrayable pour un moteur à combustion interne - Google Patents

Commande de soupape embrayable pour un moteur à combustion interne Download PDF

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Publication number
EP1881165A2
EP1881165A2 EP07111935A EP07111935A EP1881165A2 EP 1881165 A2 EP1881165 A2 EP 1881165A2 EP 07111935 A EP07111935 A EP 07111935A EP 07111935 A EP07111935 A EP 07111935A EP 1881165 A2 EP1881165 A2 EP 1881165A2
Authority
EP
European Patent Office
Prior art keywords
carrier
bearing pin
piston
bore
gear according
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.)
Withdrawn
Application number
EP07111935A
Other languages
German (de)
English (en)
Other versions
EP1881165A3 (fr
Inventor
Richard Best
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.)
IHO Holding GmbH and Co KG
Original Assignee
Schaeffler 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 KG filed Critical Schaeffler KG
Publication of EP1881165A2 publication Critical patent/EP1881165A2/fr
Publication of EP1881165A3 publication Critical patent/EP1881165A3/fr
Withdrawn legal-status Critical Current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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead 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
    • F01L1/181—Centre pivot rocking arms
    • F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
    • 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
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • 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
    • F01L13/0005—Deactivating valves
    • 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
    • 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
    • F01L13/0031—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 tappet or pushrod length
    • 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
    • F01L2001/188—Fulcrums at upper surface
    • 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
    • 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
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20882—Rocker arms

Definitions

  • the invention relates to a switchable valve train for an internal combustion engine, with a series of extending in the longitudinal direction of a cylinder head rocker arms, which on the one hand at one end underside an at least indirect contact surface for at least one cam and the other end a valve seat immanent and the other extend over a recess at its top on a head of a bearing pin, wherein at least a subset of the bearing pins is arranged axially movable in a corresponding bore of an overlying carrier or an insert connected to the carrier, each unit [movable bearing pin / carrier or insert]
  • Coupling means for selectively coupling the movable bearing pin are at least indirectly associated with the carrier, so that in the extended state of the movable bearing pin in coupling a large and decoupling a contrast smaller ode r 0-valve lift is generated and wherein the respective movable bearing pin is acted upon via a lost-motion spring out of its bore.
  • Such a valve train is considered from the considered generic DE 32 39 941 A1 out.
  • a disadvantage of this see Figure 1) whose extremely elaborately designed coupling mechanism. Laterally on the support a rod-like slide is arranged, which engages over a one-end cone-shaped end surface in the coupling case in an annular groove of a bearing pin.
  • the object of the invention is therefore to provide a switchable valve train of the aforementioned type, in which the cited disadvantages are eliminated.
  • annular groove is arranged in the outer jacket of the movable bearing pin whose at least axially lower annular surface is orthogonal to the axial line of the bore of the carrier or insert part, said hole cut by at least one radially or secant extending recess in the carrier or insert is, in the decoupling case at least a piston sitting as a coupling agent, the, starting is shown by its radially inner end, stepped with an underlying flattening and for the coupling case with its flattening sections on the lower annular surface of the annular groove of the bearing pin is displaced.
  • the solution has, for example, the advantage that the coupling means do not oscillate during operation with the bearing pin and thus are not part of the moving masses.
  • hydraulic means for displacing the coupling means for example, can be conveyed longitudinally out of the carrier or out of the insert part.
  • the annular groove in the outer jacket of the bearing pin is manufacturing technology also very easy to represent, with the surface pressure is kept low in the coupling case because of the claims proposed according flattenings.
  • two pistons located diametrically opposite one another in the carrier / in the insert part should be provided as coupling means, so that in the coupling case, a tilting tendency of the bearing pin is prevented.
  • this arrangement has the advantage that, should it come to an insufficient "extension" of the piston after triggered coupling command, at least the other piston carries.
  • this can be pre-assembled with the piston, etc. set in an immediate respective recording of the wearer.
  • the pistons are to run in transversely extending through holes in the carrier / in the insert part, which carrier is for example made of a lightweight material such as aluminum or the like.
  • the pistons can then be displaced in the coupling direction, when their end facing the annular groove has a radius curve, which correlates to that of the annular groove.
  • a particularly good bearing surface is displayed.
  • a bore or the like may be provided instead of the annular groove for retracting the piston. In this case, however, then the bearing pin must preferably be secured against rotation.
  • the support is designed as a continuous strip for at least one row of the rocker arm extending in the longitudinal direction of the cylinder head.
  • the scope of the invention is also related to a valve train with a carrier, which is assigned in one piece to a plurality of rows of extending in the longitudinal direction of the cylinder head rocker arms.
  • the carrier may also be associated with individual rocker arms or groups of rocker arms.
  • the recesses may be part of a through hole.
  • two recesses (diametrically opposite) can be created in one operation.
  • star-shaped circumferentially distributed recesses may be provided (at least three recesses).
  • valve train with hydraulic clearance compensation.
  • the bearing pin with the play compensation device, so that this is formed quasi two-part and consists of a pressure piston with the head, which is received in a guide bore of a housing as another part of the bearing pin. This eliminates the need for complex mechanical clearance measures, which are also conceivable.
  • the necessary for the decoupling case Lost-motion spring is formed according to another embodiment of the invention as at least one helical or coil compression spring and should act at one end against a front of the bearing pin and the other end against a bottom of the bore of the carrier.
  • the reason of the bore of the carrier may be integrally connected to the carrier, but it is also provided to apply in this area a separate plug o. The like.
  • a switchable valve train 1 for an internal combustion engine This consists of an "overhead" carrier 11 for a series of extending in the longitudinal direction of a cylinder head rocker arms 2.
  • the rocker arm 2 shown here has at its bottom 3 at one end a stop surface 4 (roller bearing roller) for a cam 30 and at the other End of a valve seat 5 for at least one gas exchange valve 29th
  • the respective rocker arm 2 has a dome-shaped recess 7.
  • the head 8 is part of a pressure piston 26 of a hydraulic lash adjuster 25.
  • the bearing pin 9, thus having the lash adjuster 25 extends with its outer shell 13a in a downwardly open bore 10 of the carrier 11 / Insert 11a. He is held telescopically movable relative to this bore 10.
  • the outer casing 13a of the bearing pin 9 has an annular groove 14. At least its lower annular surface 15 runs perpendicular to the axial line of the bearing pin 9.
  • a lost-motion spring 13 is integrated within the bore 10 of the carrier 11 / insert part 11a. This sits at one end on a rocker arm 2 facing away from the end 27 of the bearing pin 9 and the other end acts against a bottom 28 of the bore 10. As can be seen, the respective bore 10 is pot-shaped closed, so that the base 28 is an integral part of the carrier 11 , However, it is also conceivable and intended to arrange a separate cap o. The like. As a "reason".

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)
EP07111935A 2006-07-21 2007-07-06 Commande de soupape embrayable pour un moteur à combustion interne Withdrawn EP1881165A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80797106P 2006-07-21 2006-07-21

Publications (2)

Publication Number Publication Date
EP1881165A2 true EP1881165A2 (fr) 2008-01-23
EP1881165A3 EP1881165A3 (fr) 2009-12-16

Family

ID=38596168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07111935A Withdrawn EP1881165A3 (fr) 2006-07-21 2007-07-06 Commande de soupape embrayable pour un moteur à combustion interne

Country Status (3)

Country Link
US (1) US7568459B2 (fr)
EP (1) EP1881165A3 (fr)
DE (1) DE102007031806A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101581240B (zh) * 2009-06-30 2011-09-21 奇瑞汽车股份有限公司 一种连续可变气门升程装置及其控制方法
FR2985541A1 (fr) * 2012-01-11 2013-07-12 Valeo Sys Controle Moteur Sas Butee de deconnexion, notamment pour l'actionnement de soupape(s)
KR101338462B1 (ko) 2012-10-16 2013-12-10 현대자동차주식회사 가변 밸브 리프트 장치

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007016752A1 (de) * 2007-04-07 2008-10-09 Schaeffler Kg Ventiltrieb einer Brennkraftmaschine
KR101209740B1 (ko) 2010-09-20 2012-12-07 현대자동차주식회사 가변 밸브 기구를 구비한 엔진
DE102011005851A1 (de) 2011-03-21 2012-09-27 Schaeffler Technologies Gmbh & Co. Kg Ventiltriebsystem für eine Brennkraftmaschine
DE112016001685T5 (de) 2015-05-07 2018-01-25 Eaton Corporation Ventiltriebbaugruppe
BR112022021636A2 (pt) 2020-05-04 2022-12-06 Jacobs Vehicle Systems Inc Sistema de atuação de válvula compreendendo movimento perdido e componentes de transferência de alta elevação em um caminho de carga de movimento principal

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3239941A1 (de) * 1982-10-28 1984-05-03 Volkswagenwerk Ag, 3180 Wolfsburg Vorrichtung zur abschaltung des ventiltriebes einer brennkraftmaschine
JPS59201913A (ja) * 1983-04-28 1984-11-15 Mazda Motor Corp エンジンの弁不作動装置
DE3743854A1 (de) * 1987-12-23 1989-07-06 Michael Stirm Vierventilsteuerung mit oberen abstuetzelementen
JPH0385309A (ja) * 1989-08-29 1991-04-10 Fuji Heavy Ind Ltd 弁作動停止装置
WO2000020730A1 (fr) * 1998-10-05 2000-04-13 Eaton Automotive S.P.A. Ensemble commande des soupapes
EP1149989A1 (fr) * 2000-03-23 2001-10-31 Eaton Corporation Désactivation d'une soupape avec un ergot de verrouillage hydraulique
US20030075129A1 (en) * 1999-07-01 2003-04-24 Spath Mark J. Valve lifter assembly for selectively deactivating a cylinder
EP1462623A1 (fr) * 2003-03-19 2004-09-29 Eaton Corporation Système de commande de soupape permettant deux levées de soupape et la désactivation de soupape
WO2005028816A1 (fr) * 2003-09-05 2005-03-31 Ina-Schaeffler Kg Entrainement de soupapes
EP1544422A1 (fr) * 2003-11-05 2005-06-22 EATON AUTOMOTIVE S.p.A. Système de désactivation de soupape et dispositif hydraulique de reglage de jeu verrouillable pour ça

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3239941A1 (de) * 1982-10-28 1984-05-03 Volkswagenwerk Ag, 3180 Wolfsburg Vorrichtung zur abschaltung des ventiltriebes einer brennkraftmaschine
JPS59201913A (ja) * 1983-04-28 1984-11-15 Mazda Motor Corp エンジンの弁不作動装置
DE3743854A1 (de) * 1987-12-23 1989-07-06 Michael Stirm Vierventilsteuerung mit oberen abstuetzelementen
JPH0385309A (ja) * 1989-08-29 1991-04-10 Fuji Heavy Ind Ltd 弁作動停止装置
WO2000020730A1 (fr) * 1998-10-05 2000-04-13 Eaton Automotive S.P.A. Ensemble commande des soupapes
US20030075129A1 (en) * 1999-07-01 2003-04-24 Spath Mark J. Valve lifter assembly for selectively deactivating a cylinder
EP1149989A1 (fr) * 2000-03-23 2001-10-31 Eaton Corporation Désactivation d'une soupape avec un ergot de verrouillage hydraulique
EP1462623A1 (fr) * 2003-03-19 2004-09-29 Eaton Corporation Système de commande de soupape permettant deux levées de soupape et la désactivation de soupape
WO2005028816A1 (fr) * 2003-09-05 2005-03-31 Ina-Schaeffler Kg Entrainement de soupapes
EP1544422A1 (fr) * 2003-11-05 2005-06-22 EATON AUTOMOTIVE S.p.A. Système de désactivation de soupape et dispositif hydraulique de reglage de jeu verrouillable pour ça

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101581240B (zh) * 2009-06-30 2011-09-21 奇瑞汽车股份有限公司 一种连续可变气门升程装置及其控制方法
FR2985541A1 (fr) * 2012-01-11 2013-07-12 Valeo Sys Controle Moteur Sas Butee de deconnexion, notamment pour l'actionnement de soupape(s)
KR101338462B1 (ko) 2012-10-16 2013-12-10 현대자동차주식회사 가변 밸브 리프트 장치

Also Published As

Publication number Publication date
US7568459B2 (en) 2009-08-04
DE102007031806A1 (de) 2008-01-24
US20080017153A1 (en) 2008-01-24
EP1881165A3 (fr) 2009-12-16

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