EP1375847A3 - Variable valve drive - Google Patents

Variable valve drive Download PDF

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Publication number
EP1375847A3
EP1375847A3 EP03012206A EP03012206A EP1375847A3 EP 1375847 A3 EP1375847 A3 EP 1375847A3 EP 03012206 A EP03012206 A EP 03012206A EP 03012206 A EP03012206 A EP 03012206A EP 1375847 A3 EP1375847 A3 EP 1375847A3
Authority
EP
European Patent Office
Prior art keywords
intermediate member
variable
hubübertragungsanordnung
control cam
engagement
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Withdrawn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
EP03012206A
Other languages
German (de)
French (fr)
Other versions
EP1375847A2 (en
Inventor
Andreas Werler
Michael Seidel
Heiko Neukirchner
Lutz Stiegler
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.)
IAV GmbH Ingenieurgesellschaft Auto und Verkehr
Original Assignee
IAV GmbH Ingenieurgesellschaft Auto und Verkehr
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
Priority claimed from DE10061618A external-priority patent/DE10061618B4/en
Priority claimed from DE10226300A external-priority patent/DE10226300B4/en
Priority claimed from DE20220138U external-priority patent/DE20220138U1/en
Application filed by IAV GmbH Ingenieurgesellschaft Auto und Verkehr filed Critical IAV GmbH Ingenieurgesellschaft Auto und Verkehr
Publication of EP1375847A2 publication Critical patent/EP1375847A2/en
Publication of EP1375847A3 publication Critical patent/EP1375847A3/en
Withdrawn legal-status Critical Current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
    • F01L13/0021—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
    • 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
    • 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
    • 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
    • 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
    • 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
    • Y10T74/20582—Levers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

Die Erfindung betrifft eine Einrichtung zur variablen Betätigung von Ventilen mittels Nocken, vorzugsweise für Verbrennungsmotoren.The invention relates to a device for the variable actuation of valves by means of cams, preferably for internal combustion engines.

Der Erfindung liegt die Aufgabe zugrunde, eine Einrichtung zur variablen Betätigung von Ventilen der gattungsgemäßen Art zu verbessern, um günstige kinematische Verhältnisse, verminderte mechanische Beanspruchungen und eine kompakte Gestaltung des hubübertragenden Zwischengliedes zu erzielen.The invention has for its object to improve a device for variable actuation of valves of the generic type to achieve favorable kinematic conditions, reduced mechanical stress and a compact design of the hub-transmitting intermediate member.

Erfindungsgemäß wird das dadurch erreicht, dass die Steuerkurve auf jener der Hubübertragungsanordnung zugekehrten Seite bei einer Stellung für Null- oder geringen Hub zu dieser parallel oder wenig geneigt verlaufend angeordnet ist. Generell ist es auch kinematisch vorteilhaft, die Stützkurve am in seiner Stellung veränderlichen Element für das Zwischenglied auf der dem Nocken zugewandten Hälfte des in seiner Stellung veränderlichen Elementes anzuordnen. Besonders günstige Belastungsverhältnisse für das Zwischenglied ergeben sich, wenn im Bewegungsbereich hoher Ventilbetätigungskräfte die Eingriffslinien zwischen Steuerkurve und Zwischenglied sowie Hubübertragungsanordnung und Zwischenglied in einem Bereich verlaufen, der sich nahe um die Verbindungsgerade zwischen der Drehachse des veränderlichen Elements und der Eingriffslinie zwischen Hubübertragungsanordnung und Zwischenglied erstreckt. Eine kinematisch und für die mechanische Beanspruchung des Zwischengliedes günstige Ausführung ist auch dadurch zu erzielen, dass das Zwischenglied während des Öffnungshubes durch die sich gegenüberliegenden Eingriffsbereiche an der Steuerkurve und der Hubübertragungsanordnung gezogen wird.

Figure imgaf001
According to the invention this is achieved in that the control cam is arranged on that of the Hubübertragungsanordnung facing side at a position for zero or small stroke to this parallel or slightly inclined running. In general, it is also kinematically advantageous to arrange the support curve on the variable in its position element for the intermediate member on the cam facing half of the variable in its position element. Particularly favorable loading conditions for the intermediate member arise when in the range of movement of high valve actuating forces the lines of engagement between the control cam and intermediate member and Hubübertragungsanordnung and intermediate member in a range extending close to the connecting line between the axis of rotation of the variable element and the line of engagement between the Hubübertragungsanordnung and intermediate member. A kinematic and favorable for the mechanical stress of the intermediate member embodiment is also achieved in that the intermediate member is pulled during the opening stroke through the opposing engagement portions on the control cam and the Hubübertragungsanordnung.
Figure imgaf001
EP03012206A 2000-12-11 2003-06-06 Variable valve drive Withdrawn EP1375847A3 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10061618A DE10061618B4 (en) 2000-12-11 2000-12-11 Device for the variable actuation of valves by means of cams for internal combustion engines
DE10226300A DE10226300B4 (en) 2002-06-10 2002-06-10 Device for the variable actuation of valves by means of cams for internal combustion engines
DE10226300 2002-06-10
DE20220138U DE20220138U1 (en) 2002-12-20 2002-12-20 Valve train with cams for variable actuation of valves for internal combustion engines
DE20220138U 2002-12-20

Publications (2)

Publication Number Publication Date
EP1375847A2 EP1375847A2 (en) 2004-01-02
EP1375847A3 true EP1375847A3 (en) 2006-08-23

Family

ID=29713128

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03012206A Withdrawn EP1375847A3 (en) 2000-12-11 2003-06-06 Variable valve drive

Country Status (2)

Country Link
US (1) US6955146B2 (en)
EP (1) EP1375847A3 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004008389A1 (en) * 2004-02-20 2005-09-08 Bayerische Motoren Werke Ag Valve drive for an I.C. engine comprises a first adjusting device with a cam whose radius increases or decreases over a periphery with respect to a rotating axle
DE102004011639A1 (en) * 2004-03-10 2005-09-29 Ina-Schaeffler Kg Variable mechanical valve train control
DE102005035314B4 (en) * 2005-07-28 2013-03-14 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Valve train for charge exchange valves of four-stroke internal combustion engines
DE102005035315B4 (en) * 2005-07-28 2007-05-10 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Variable valve train for internal combustion engines
JP2007127117A (en) * 2005-10-04 2007-05-24 Masaaki Yoshikawa Valve system apparatus for four-stroke internal combustion engine
KR100667394B1 (en) * 2005-11-15 2007-01-10 현대자동차주식회사 Continuously variable valve lift system in engine
US7121241B1 (en) * 2006-01-10 2006-10-17 Eaton Corporation Valve control system including deactivating rocker arm
KR100868209B1 (en) * 2006-11-16 2008-11-11 현대자동차주식회사 Continuous variable valve lift apparatus
EP2025888A1 (en) * 2007-08-06 2009-02-18 Iveco S.p.A. Device for actuating the decompression engine brake in an internal combustion engine provided with hydraulic tappets
KR100909497B1 (en) * 2007-09-19 2009-07-27 고려대학교 산학협력단 Continuously variable valve lift device in the engine
KR20090056602A (en) * 2007-11-30 2009-06-03 현대자동차주식회사 Variable valve lift apparatus
CN106523067A (en) * 2016-12-20 2017-03-22 江苏三能动力总成有限公司 Engine continuously variable valve lift structure

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4438736A (en) * 1981-03-10 1984-03-27 Nissan Motor Co., Ltd. Variable valve timing arrangement with automatic valve clearance adjustment
DE4326331A1 (en) * 1992-07-15 1995-02-09 Bayerische Motoren Werke Ag Valve gear of an internal combustion engine
WO1995009298A1 (en) * 1993-09-30 1995-04-06 Lotus Cars Ltd. Valve operating mechanism for internal combustion engines
DE10006016A1 (en) * 2000-02-11 2001-08-16 Schaeffler Waelzlager Ohg Variable valve drive for load control of external ignited IC engine pref. fully variable for non-throttle load control and drive is arranged between camshaft cam and an inlet
DE10006015A1 (en) * 2000-02-11 2001-08-16 Schaeffler Waelzlager Ohg Variable valve drive for load control of separately ignited IC engine pref. fully variable drive for throttle free engine control and drive is arranged between lifting facility
DE10061618A1 (en) * 2000-12-11 2002-06-27 Iav Gmbh Cam-type variable valve operating device has variable setting element turning on axis fixed in cylinder head and support and control curve covering more than 180 degrees
DE10119686A1 (en) * 2001-04-20 2002-11-14 Iav Gmbh Valve gear, for an IC motor, has a structured intermediate lever mounted under the camshaft to give a variable opening characteristic according to the motor loading and its speed

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2934052A (en) * 1958-11-17 1960-04-26 Irvin R Longenecker Valve operating mechanism
DE2629554A1 (en) 1976-07-01 1978-01-12 Daimler Benz Ag Charge regulator for mixture compression engine - has valve actuator lever moved by cam with adjustable rotation centre
FR2519375B1 (en) * 1981-12-31 1986-07-11 Baguena Michel VARIABLE VALVE FOR FOUR-STROKE ENGINE
US4723515A (en) * 1983-05-05 1988-02-09 Investment Rarities Incorporated Mechanism utilizing a single rocker arm for controlling an internal combustion engine valve
GB8723256D0 (en) * 1987-10-03 1987-11-04 Jaguar Cars Valve mechanisms
DE3833540A1 (en) 1988-10-01 1990-04-12 Peter Prof Dr Ing Kuhn DEVICE FOR ACTUATING THE VALVES OF INTERNAL COMBUSTION ENGINES WITH VARIABLE VALVE LIFTING CURVE
US5205247A (en) * 1992-01-29 1993-04-27 Hoffman Christopher J Infinitely variable lift cam follower with consistent dwell position
DE19913742A1 (en) 1999-03-26 2000-09-28 Bayerische Motoren Werke Ag Device for stroke adjustment of a gas exchange valve in the cylinder head of an internal combustion engine
GB2357131A (en) * 1999-12-09 2001-06-13 Mechadyne Internat Plc Valve actuating mechanism
DE10123186A1 (en) 2001-05-12 2002-11-14 Bayerische Motoren Werke Ag Valve gear device for variable lift adjustment is for gas exchange valve of internal combustion engine and has valve vai intermediary of transmission component effectively connected to roller movable around rotary axis

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4438736A (en) * 1981-03-10 1984-03-27 Nissan Motor Co., Ltd. Variable valve timing arrangement with automatic valve clearance adjustment
DE4326331A1 (en) * 1992-07-15 1995-02-09 Bayerische Motoren Werke Ag Valve gear of an internal combustion engine
WO1995009298A1 (en) * 1993-09-30 1995-04-06 Lotus Cars Ltd. Valve operating mechanism for internal combustion engines
DE10006016A1 (en) * 2000-02-11 2001-08-16 Schaeffler Waelzlager Ohg Variable valve drive for load control of external ignited IC engine pref. fully variable for non-throttle load control and drive is arranged between camshaft cam and an inlet
DE10006015A1 (en) * 2000-02-11 2001-08-16 Schaeffler Waelzlager Ohg Variable valve drive for load control of separately ignited IC engine pref. fully variable drive for throttle free engine control and drive is arranged between lifting facility
DE10061618A1 (en) * 2000-12-11 2002-06-27 Iav Gmbh Cam-type variable valve operating device has variable setting element turning on axis fixed in cylinder head and support and control curve covering more than 180 degrees
DE10119686A1 (en) * 2001-04-20 2002-11-14 Iav Gmbh Valve gear, for an IC motor, has a structured intermediate lever mounted under the camshaft to give a variable opening characteristic according to the motor loading and its speed

Also Published As

Publication number Publication date
US20030226530A1 (en) 2003-12-11
US6955146B2 (en) 2005-10-18
EP1375847A2 (en) 2004-01-02

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