EP1854967A2 - Tête de cylindre pour un moteur à combustion interne doté d'une commande de soupape à levée variable - Google Patents

Tête de cylindre pour un moteur à combustion interne doté d'une commande de soupape à levée variable Download PDF

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Publication number
EP1854967A2
EP1854967A2 EP07006942A EP07006942A EP1854967A2 EP 1854967 A2 EP1854967 A2 EP 1854967A2 EP 07006942 A EP07006942 A EP 07006942A EP 07006942 A EP07006942 A EP 07006942A EP 1854967 A2 EP1854967 A2 EP 1854967A2
Authority
EP
European Patent Office
Prior art keywords
cylinder head
head according
adjusting device
adjusting
variable
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
EP07006942A
Other languages
German (de)
English (en)
Other versions
EP1854967A3 (fr
EP1854967B1 (fr
Inventor
Johannes Meyer
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1854967A2 publication Critical patent/EP1854967A2/fr
Publication of EP1854967A3 publication Critical patent/EP1854967A3/fr
Application granted granted Critical
Publication of EP1854967B1 publication Critical patent/EP1854967B1/fr
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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
    • F01L13/0021—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 rocker arm ratio
    • 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
    • F01L13/0021—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 rocker arm ratio
    • F01L13/0026—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 rocker arm ratio by means of an eccentric
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/032—Electric motors

Definitions

  • the invention relates to a cylinder head for an internal combustion engine with a variable-stroke valve drive with the features of the preamble of claim 1.
  • the invention is based on the current BMW inline six-cylinder gasoline engine with magnesium crankcase and Valvetronic.
  • Valvetronic is the name for a variable-stroke valve train, as it is for example in the German Offenlegungsschrift DE 101 23 186 A1 is described.
  • the gas exchange valve with the interposition of a transmission element with a movable about a rotation axis roller operatively connected to a, a Leerhubkurve and a lift cam control path, which is arranged in an end region of a stroke of the gas exchange valve controlled by a cam of a camshaft pivot lever.
  • the play-free by means of a spring on a roller cam associated with the pivot lever is the other hand for variable stroke adjustment of the gas exchange valve controlled by means of an adjustment position adjustable and fixable swing fulcrum supported along a circular path.
  • an adjustment position adjustable and fixable swing fulcrum supported along a circular path arranged on a housing part of the engine circular path is provided as a backdrop with a radius "R" about the axis of rotation of the roller of the transmission element for controlled positionally variable support of the pivot lever.
  • the adjusting device is a, arranged on an eccentric shaft gear segment. This gear segment is rotated by means of an adjusting element, an electric motor with a threaded screw.
  • the actuator is arranged geodetically above the variable stroke valve train.
  • the attachment of the actuating element is carried out by means of the valve cover. This arrangement can be seen, for example, from the BMW press release 6/2004 on the new BMW straight-six gasoline engine in pictures P0014646 and P0014647.
  • the adjusting device according to claim 3 is changed either by a linear movement or a rotational movement of the actuating element in the position.
  • the embodiment according to claim 4 is a proven in practice actuator.
  • the actuator can be tempered according to claim 6 of a lubricant or a coolant of the internal combustion engine.
  • FIG. 1 shows a plan view of a section of a cylinder head 1 designed according to the invention of an internal combustion engine (not shown).
  • the width of the section corresponds approximately to the diameter of a cylinder of the internal combustion engine.
  • the cylinder head 1 has two valve trains, a conventional valve train 2 'on an exhaust side and a variable-stroke valve train 2 on an inlet side. Since the exhaust-side valvetrain 2 'is a conventional valvetrain, this is not explained in the context of the present description.
  • the inlet-side, variable-stroke valve drive 2 largely corresponds to that in the DE 101 23 186 A1 described habvariable valve train.
  • a spark plug arranged in a sleeve.
  • a complete cylinder head 1, for example, for a six-cylinder internal combustion engine is composed of six illustrated sections, but waves, such. B. a camshaft 9 ', are provided in common for all sections.
  • roller element is arranged on the pivot lever 3, which is in operative connection with the cam 9.
  • the camshaft 9 Upon rotation of the camshaft 9 'pivots the pivot lever 3 against a spring force of the spring 10 and pushes with its control cam. 6 the gas exchange valve in an open position.
  • the roller element 4 is supported next to the support on the slide track on an adjusting device 11, with a swing fulcrum of the roller element 4 can be moved parallel to the slide track.
  • the adjusting device 11 consists of an eccentric shaft with a gear segment. A displacement of the roller element 4 with an eccentric along the slide track causes a change in the Gas monventilhubes eighth
  • an actuating element 12 is provided, which is arranged according to the invention on the cylinder head 1.
  • the adjusting element 12 consists essentially of an electric machine with a meshing with the gear segment threaded screw 14.
  • a longitudinal axis 12 'of the adjusting element 12 is largely aligned in the direction of a cylinder longitudinal axis.
  • a portion of the control element 12 may also be integrated into the cylinder head 1.
  • the rigidity of the entire adjusting drive is further improved.
  • the adjusting device 11 can be rotated via a linear movement or a rotational movement of the actuating element 12. This can be done, for example, by hydraulic adjustment systems or electromechanical adjustment systems.
  • the electric machine is a brushless electric motor.
  • the adjusting element 12 prefferably be tempered with a lubricant or a coolant of the internal combustion engine in order to minimize thermal elongation within the entire adjustment mechanism.
  • a very compact arrangement in the Cylinder head is achieved when the actuator 12 is disposed between two ignition devices 15.
  • the arrangement of the actuating element 12 in the cylinder head 1 allows a very compact package, since no parts of the actuating element 12 or the necessary adjusting gear, gear segment and screw, project beyond the edges of the cylinder head 1.
  • the installation site offers the possibility of an optimal connection to a cooled with a coolant surface, so that a good cooling or temperature control of the control element 12 is possible.
  • the actuator 12 may also be cooled with a lubricant of the internal combustion engine.
  • no lubricant-tight seal the stator / rotor unit must be provided, as this also runs directly in the lubricant mist. This eliminates the disadvantage of friction of a shaft seal.
  • the actuator 12 can be checked for operability at the initial assembly or repair even with open cylinder head 1, so that in the case of failure, the cost of rework is much lower. For disassembly of a valve cover hood the actuator 12 does not have to be removed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
EP20070006942 2006-05-13 2007-04-03 Tête de cylindre pour un moteur à combustion interne doté d'une commande de soupape à levée variable Active EP1854967B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610022481 DE102006022481A1 (de) 2006-05-13 2006-05-13 Zylinderkopf für eine Brennkraftmaschine mit einem hubvariablen Ventiltrieb

Publications (3)

Publication Number Publication Date
EP1854967A2 true EP1854967A2 (fr) 2007-11-14
EP1854967A3 EP1854967A3 (fr) 2010-03-24
EP1854967B1 EP1854967B1 (fr) 2012-08-15

Family

ID=38255016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070006942 Active EP1854967B1 (fr) 2006-05-13 2007-04-03 Tête de cylindre pour un moteur à combustion interne doté d'une commande de soupape à levée variable

Country Status (2)

Country Link
EP (1) EP1854967B1 (fr)
DE (1) DE102006022481A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2568132A1 (fr) * 2011-09-07 2013-03-13 Bayerische Motoren Werke Aktiengesellschaft Double ressort spiralé pour une commande de soupape à levage variable dans une tête de cylindre d'un moteur à combustion interne
DE102008057135B4 (de) * 2008-11-13 2020-11-12 Audi Ag Brennkraftmaschine mit einem Rollenschlepphebel aufweisenden Ventiltrieb

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004085804A1 (fr) 2003-03-24 2004-10-07 Thyssenkrupp Automotive Ag Dispositif de commande variable de soupapes d'echange des gaz pour moteurs a combustion interne et procede de fonctionnement d'un dispositif de ce type
JP2004353643A (ja) 2003-05-26 2004-12-16 Zenji Ishikawa ４サイクル内燃機関の動弁機構
WO2005073523A1 (fr) 2004-01-30 2005-08-11 Honda Motor Co., Ltd. Moteur

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11264310A (ja) * 1998-03-18 1999-09-28 Honda Motor Co Ltd 内燃機関の動弁装置
DE19825308A1 (de) * 1998-06-05 1999-12-09 Bayerische Motoren Werke Ag Variabler Ventiltrieb für eine Brennkraftmaschine
DE10100173A1 (de) * 2001-01-04 2002-07-11 Fev Motorentech Gmbh Vollvariabler mechanischer Ventiltrieb für eine Kolbenbrennkraftmaschine
JP2003003812A (ja) * 2001-06-19 2003-01-08 Suzuki Motor Corp 動弁装置およびこれを備えた内燃機関
DE10206465A1 (de) * 2002-02-16 2003-08-28 Mahle Ventiltrieb Gmbh Steuereinrichtung für Gaswechselventile eines Verbrennungsmotors
DE10211998A1 (de) * 2002-03-18 2003-10-02 Ina Schaeffler Kg Vorrichtung zum Steuern der Zylinderladung eines fremdgezündeten Verbrennungsmotors
JP2005042642A (ja) * 2003-07-24 2005-02-17 Honda Motor Co Ltd エンジンの動弁装置
JP4278152B2 (ja) * 2004-01-20 2009-06-10 本田技研工業株式会社 内燃機関の動弁装置
FR2872542B1 (fr) * 2004-07-05 2008-09-26 Renault Sas Dispositif d'actionnement variable d'au moins une soupape de moteur a combustion interne et procede de commande associe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004085804A1 (fr) 2003-03-24 2004-10-07 Thyssenkrupp Automotive Ag Dispositif de commande variable de soupapes d'echange des gaz pour moteurs a combustion interne et procede de fonctionnement d'un dispositif de ce type
JP2004353643A (ja) 2003-05-26 2004-12-16 Zenji Ishikawa ４サイクル内燃機関の動弁機構
WO2005073523A1 (fr) 2004-01-30 2005-08-11 Honda Motor Co., Ltd. Moteur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008057135B4 (de) * 2008-11-13 2020-11-12 Audi Ag Brennkraftmaschine mit einem Rollenschlepphebel aufweisenden Ventiltrieb
EP2568132A1 (fr) * 2011-09-07 2013-03-13 Bayerische Motoren Werke Aktiengesellschaft Double ressort spiralé pour une commande de soupape à levage variable dans une tête de cylindre d'un moteur à combustion interne

Also Published As

Publication number Publication date
DE102006022481A1 (de) 2007-11-15
EP1854967A3 (fr) 2010-03-24
EP1854967B1 (fr) 2012-08-15

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