EP2203631A1 - Dispositif servant à actionner une soupape - Google Patents

Dispositif servant à actionner une soupape

Info

Publication number
EP2203631A1
EP2203631A1 EP08802868A EP08802868A EP2203631A1 EP 2203631 A1 EP2203631 A1 EP 2203631A1 EP 08802868 A EP08802868 A EP 08802868A EP 08802868 A EP08802868 A EP 08802868A EP 2203631 A1 EP2203631 A1 EP 2203631A1
Authority
EP
European Patent Office
Prior art keywords
safety
valve drive
safety device
actuating
slide track
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Withdrawn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
EP08802868A
Other languages
German (de)
English (en)
Inventor
Jens Meintschel
Thomas Stolk
Alexander Von Gaisberg-Helfenberg
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.)
Mercedes Benz Group AG
Original Assignee
Daimler 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 Daimler AG filed Critical Daimler AG
Publication of EP2203631A1 publication Critical patent/EP2203631A1/fr
Withdrawn legal-status Critical Current

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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/13—Electromagnets; Actuators including electromagnets with armatures characterised by pulling-force characteristics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1638—Armatures not entering the winding

Definitions

  • the invention relates to a valve drive device, in particular for an internal combustion engine, according to the preamble of claim 1.
  • valve drive devices in particular for an internal combustion engine, with at least one actuating device, which is intended to adjust an axially displaceable cam member by means of at least one slide track, known.
  • the invention is in particular the object to provide a valve drive device in which a risk of damage can be reduced by a disadvantageous position of the cam member.
  • the object is achieved in each case by the features of the independent claims, wherein further embodiments of the invention can be taken from the subclaims.
  • the invention relates to a valve drive device, in particular for an internal combustion engine, with at least one actuating device, which is provided to adjust an axially displaceable cam element by means of at least one slide track.
  • the valve drive device comprises a safety device which is provided for the cam element in at least one operating mode into a definite safety device. ned security basis.
  • the "defined safety basic position” should be understood to mean, in particular, a position of the cam element in which a basic function of the valve drive device, such as, in particular, opening of gas exchange valves at uncritical times, is fulfilled.
  • the safety device is independent of electronic control units.
  • the safety device comprises a slide track, which is attached ⁇ arranged on the cam member and which is provided to move the cam member in the initial position defined safety is proposed.
  • a safety device can be realized simply and with little effort of components.
  • the safety device has at least one actuating tappet, which is vorgese ⁇ hen to intervene in the slide track. Thereby, a ⁇ times an operation of the cam member through which is moved into the defined position, the safety reason No ⁇ ckenelement be achieved.
  • the actuating device is at least partially integral with the safety device out ⁇ leads. This can reduce a number of components the, whereby a particularly cost-effective safety device can be realized.
  • the safety device is activated as a function of at least one operating parameter.
  • the safety device can be specifically adapted to operating states in which a malfunction is particularly probable.
  • the safety device is activated as a function of an operating temperature. In this way it can be ensured that the cam element is in the defined basic safety position, in particular during a cold start, since a malfunction and in particular a malposition of the cam element can occur, in particular in the case of a fault-related shutdown of the internal combustion engine.
  • the safety device is designed self-switching.
  • self-switching should be understood to mean that a sensor system that determines the operating temperature, such as a temperature sensor, for example, and an actuator that is separate from the sensor system, such as a servo motor, is dispensed with
  • sensor systems which are to be understood in particular a thermally active element, and actuators, wherein darun ⁇ ter a safety device activating element should be ver ⁇ stood, designed in one piece.
  • the safety device comprises a Federmit ⁇ tel.
  • the spring means is designed as a thermally active spring means, such as a bimetallic spring.
  • the safety device has a shutdown device, which is intended to deactivate the safety device.
  • the safety device can be selectively deactivated, for example when an operating state is present in which a malfunction is ruled out, and the actuating device is intended to adjust the cam element.
  • the switch-off device comprises a solenoid unit, an efficient switch-off device can be realized in a particularly simple manner.
  • Fig. 1 is a valve drive device
  • Fig. 2 is a safety device of the valve drive device.
  • FIG. 1 shows an embodiment according to the invention of a valve drive device of an internal combustion engine.
  • the valve ⁇ driving device has an axially displaceable cam member 12, which is arranged on a camshaft 21, and which allows a switchable valve train.
  • the valve drive device comprises a safety device 15, which moves the cam element 12 into a defined safety basic position in an operating mode in which a malfunction exists (FIG. 2).
  • the valve drive device has an actuating device 10, by means of which the valve drive can be switched over.
  • the actuating device 10 has two actuators 22, 23.
  • the first actuator 22 is provided to move the cam member 12 by means of a first slide track 13 in a switching position
  • the second actuator 23 is provided to move the cam member 12 by means of a second slide track 14, a basic position which forms the defined basic safety position.
  • the safety device 15 is mostly designed in one piece with the second actuator 23 and the second slide track 14 of the actuator 10.
  • the actuator 23 comprises an actuating tappet 17, which can engage in the slide track 14. By means of the slide track 14, the valve train is switched.
  • the actuator 22, which engages in the slide track 13, is designed analogously.
  • the actuating tappet 17 of the actuator 23 has two stable positions in which it can remain when no forces act on the actuating tappet 17. In a first position, the actuating plunger 17 is retracted and is located outside an engagement in the slide track 14. If the valve gear are switched, the actuating plunger 17 is extended to a second position and engages the Kulis ⁇ senbahn 14, whereby the valve train is switched , The actuating tappet 17 is extended via an actuating unit 16, which has a solenoid unit 25. The solenoid unit 25 is energized via a control and / or regulating unit, not shown.
  • the electromagnet unit 25 is energized such that the force acting on the actuating plunger 17 is directed toward the second position, or in the direction of the slide track 14. If the actuating plunger 17 is extended, it engages in the slide track 14. Subsequently, the actuating plunger 17 is moved back into the first position due to a rotational movement of the camshaft member 12 and a rising groove bottom of the slide track 14.
  • the actuator 23 includes a spring means 18 having a temperature dependent spring force.
  • the spring means 18 is designed as a bimetallic spring whose spring force varies due to the different expansion metals with the operating temperature, whereby the safety device 15 is self-switching.
  • the safety device 15 comprises a shutdown device 19.
  • the shutdown device 19 comprises a solenoid unit which is integral with the solenoid unit 20 of the actuator.
  • the solenoid unit 20 is energized so that the force of the solenoid unit 20 of the force of the spring means 18 is directed towards the actuating plunger 17, whereby the actuating plunger 17 remains stable in the first position.
  • the spring means 18 exerts due to the design as a bimetallic spring from a force on the actuating plunger 17, which is negligibly small.
  • the spring force is so small that the Betä ⁇ t Trentsst Schemeel 17 remains stable even without energization of the electromagnet ⁇ unit 20 in the first position.
  • the actuating tappet 17 has a permanent magnet 24 which is mounted in one end of the actuating tappet.
  • the Perma ⁇ nentmagnet 24 interacts with the actuator 23 such that in the two end positions on the actuating tappet 17 Force acts, which holds the actuating rod 17 in the two positions.
  • a spring means of the safety device may be implemented as a spring means having a spring force independent of the operating temperature.
  • the safety device would then be deactivated by a constant energization of a solenoid unit when a valve drive device is to be switched to a switching position.
  • a cam element could be brought into a defined safety basis regardless of an operating temperature at a malfunction of an actuator.
  • a actuating device in which a spring means is replaced by a hydraulic element by means of an oil supplying an internal combustion engine provides ver ⁇ is conceivable.
  • An oil pressure of the internal combustion engine is much greater in a cold operating condition than in warm Be ⁇ operating state, which also by simply a safety ⁇ device can be realized, which switches depending on an operating temperature. Even with such a safe ⁇ integrated device it is possible to deactivate the safety device by means of a solenoid unit.

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)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un dispositif servant à actionner une soupape de moteur à combustion interne et consistant en au moins un système d'actionnement (10) conçu pour déplacer une came (12) dans un sens axial sur au moins un rail coulissant (13, 14). Selon l'invention, ce dispositif comprend un système de sécurité (15) conçu pour déplacer la came (12), dans au moins un mode de fonctionnement, dans une position initiale de sécurité définie.
EP08802868A 2007-11-02 2008-10-11 Dispositif servant à actionner une soupape Withdrawn EP2203631A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007052254.3A DE102007052254B4 (de) 2007-11-02 2007-11-02 Ventiltriebvorrichtung
PCT/EP2008/008618 WO2009056215A1 (fr) 2007-11-02 2008-10-11 Dispositif servant à actionner une soupape

Publications (1)

Publication Number Publication Date
EP2203631A1 true EP2203631A1 (fr) 2010-07-07

Family

ID=40227489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08802868A Withdrawn EP2203631A1 (fr) 2007-11-02 2008-10-11 Dispositif servant à actionner une soupape

Country Status (6)

Country Link
US (1) US8601990B2 (fr)
EP (1) EP2203631A1 (fr)
JP (1) JP5390529B2 (fr)
CN (1) CN101842559A (fr)
DE (1) DE102007052254B4 (fr)
WO (1) WO2009056215A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009056609A1 (de) * 2009-12-02 2011-06-09 Schaeffler Technologies Gmbh & Co. Kg Elektromagnetische Stellvorrichtung
DE102011079189A1 (de) * 2011-07-14 2013-01-17 Schaeffler Technologies AG & Co. KG Schiebenockensystem mit zwei Pin Aktoreinheiten
DE102012006820B4 (de) * 2012-04-04 2019-08-22 Audi Ag Verfahren zum Betreiben eines Ventiltriebs einer Brennkraftmaschine
CN102953780B (zh) * 2012-10-24 2015-07-08 上海交通大学 排气压力控制式凸轮轴装置
CN102953777B (zh) * 2012-10-24 2015-07-08 上海交通大学 进气压力控制式凸轮轴装置
DE102012021631B4 (de) 2012-11-02 2019-10-02 Audi Ag Verfahren zum Betreiben eines Ventiltriebs einer Brennkraftmaschine sowie entsprechender Ventiltrieb
CN107489474A (zh) * 2016-12-13 2017-12-19 宝沃汽车（中国）有限公司 一种发动机及其可变气门升程装置
DE102017120145A1 (de) * 2017-09-01 2019-03-07 Man Truck & Bus Ag Schiebenockensystem

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JPS62255508A (ja) * 1986-03-26 1987-11-07 フオルクスヴア−ゲン・アクチエンゲゼルシヤフト デイ−ゼル内燃機関のための弁駆動装置
US4683452A (en) * 1986-06-30 1987-07-28 Regdon Solenoid, Inc. Bi-stable electromagnetic actuator
JP2773172B2 (ja) * 1988-12-28 1998-07-09 いすゞ自動車株式会社 バルブの安全装置
DE19519048A1 (de) * 1995-05-24 1996-11-28 Hermann Prof Dr Ing Krueger Variabler Ventiltrieb mit mehreren Nocken
DE19611641C1 (de) * 1996-03-25 1997-06-05 Porsche Ag Ventiltrieb einer Brennkraftmaschine
JP4029509B2 (ja) * 1999-02-04 2008-01-09 三菱自動車工業株式会社 内燃機関の出力可変機構制御装置
EP1083303B1 (fr) * 1999-09-08 2005-01-12 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Commande de soupape pour moteur
JP4259017B2 (ja) * 2001-05-31 2009-04-30 トヨタ自動車株式会社 内燃機関の可変動弁装置
DE20114466U1 (de) * 2001-09-01 2002-01-03 Eto Magnetic Kg Elektromagnetische Stellvorrichtung
JP3865702B2 (ja) * 2003-03-06 2007-01-10 株式会社デンソー バルブタイミング可変装置搭載車両のエンジン保護装置
DE102004011586A1 (de) * 2003-03-21 2004-10-07 Audi Ag Ventiltrieb einer einen Zylinderkopf aufweisenden Brennkraftmaschine
EP1503048B1 (fr) * 2003-07-19 2008-10-08 Dr. Ing. h.c. F. Porsche Aktiengesellschaft Mécanisme de commande de soupapes pour moteur à combustion interne
JP2005220758A (ja) * 2004-02-03 2005-08-18 Hitachi Ltd 内燃機関の制御装置
DE102004008670B4 (de) * 2004-02-21 2013-04-11 Schaeffler Technologies AG & Co. KG Ventiltrieb mit Nockenumschaltung für die Gaswechselventile eines 4-Takt-Verbrennungsmotors
DE102004029622A1 (de) * 2004-06-18 2006-01-12 Dr.Ing.H.C. F. Porsche Ag Ventilbetätigungselement mit Ventilbetätigungsabschnitten
WO2006030434A2 (fr) * 2004-09-14 2006-03-23 Moshe Gombinsky Dispositif actionneur a ressort magnetique
DE102007048915A1 (de) * 2007-10-12 2009-04-16 Daimler Ag Ventiltriebvorrichtungen

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Also Published As

Publication number Publication date
WO2009056215A1 (fr) 2009-05-07
DE102007052254A1 (de) 2009-05-07
JP2011502225A (ja) 2011-01-20
DE102007052254B4 (de) 2021-02-04
CN101842559A (zh) 2010-09-22
US20100236505A1 (en) 2010-09-23
US8601990B2 (en) 2013-12-10
JP5390529B2 (ja) 2014-01-15

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