EP1084330B1 - Valve timing system for an internal combustion engine - Google Patents

Valve timing system for an internal combustion engine Download PDF

Info

Publication number
EP1084330B1
EP1084330B1 EP99924907A EP99924907A EP1084330B1 EP 1084330 B1 EP1084330 B1 EP 1084330B1 EP 99924907 A EP99924907 A EP 99924907A EP 99924907 A EP99924907 A EP 99924907A EP 1084330 B1 EP1084330 B1 EP 1084330B1
Authority
EP
European Patent Office
Prior art keywords
valve
control
camshaft
thrust
rocker arm
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.)
Expired - Lifetime
Application number
EP99924907A
Other languages
German (de)
French (fr)
Other versions
EP1084330A1 (en
Inventor
Gert Fischer
Michael Bidlingmaier
Johannes Hoehl
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 EP1084330A1 publication Critical patent/EP1084330A1/en
Application granted granted Critical
Publication of EP1084330B1 publication Critical patent/EP1084330B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/356—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear making the angular relationship oscillate, e.g. non-homokinetic drive

Definitions

  • the invention relates to a preamble of claim 1 Valve control for an internal combustion engine, in which a control cam Camshaft acts on a lift valve via a tilting segment in a tappet, wherein the formed with a contact path acted upon by the control cam Tilt segment over a circular arc section concentric to the camshaft axis of rotation is movably guided in the plunger such that by means of a Control device with each valve stroke on the opening and closing phase of the Lifting valve determining engagement of the contact track with the flanks of the rotating Control cam by the same and / or relative to the direction of rotation of the control cam oppositely controlled swivel movement of the tilting segment is achieved.
  • valve control described above is the subject of EP 0 626 035 B1, wherein with the valve control described in this document for an internal combustion engine at lower speeds small valve opening angles with little or small overlap and high valve opening angles at high speeds much overlap of the intake and exhaust valve lift curves to form one high gas dynamics are achieved.
  • each is shown and described valve controls combined with a control device, each one in the transverse direction of the internal combustion engine to the side of the respective one Camshaft arranged control shaft includes.
  • the control shaft on the respective intermediate elements Transmission elements result in an additional in the cylinder head of the internal combustion engine Space requirement, which is not given for example with a given valve angle or leads to a wider cylinder head.
  • the invention has for its object the generic valve control to improve in such a way that these are independent of the available space in a given cylinder head under an unchanged one Cylinder head cover can be arranged.
  • Control device one arranged in the valve stroke direction over a machine housing side first sliding swivel joint and another one provided on the tilting segment side Sliding swivel-guided thrust swing arm encircled with one by one control cam-free section of the camshaft with play-through control opening, on the circumference of a controllable element in / on the camshaft engages with this adjusting device, which is also rotated, that eccentrically in the valve stroke direction with the control opening Camshaft axis of rotation adjustable thrust arm with rotating camshaft For each valve stroke, one that controls the tilting segment, periodic swinging movement transverse to the valve stroke direction in superimposition with a executes thrust movement caused in the valve stroke direction.
  • the invention in advantageously a small-sized control device for changing the valve opening angle achieved in a space-reducing manner in that the Control shaft or an equivalent other adjusting device with associated Adjustment means are arranged in and around the camshaft in close proximity for periodic oscillation drive one driving on the respective tilting segment acting thrust rocker, which is preferably beyond the camshaft over a Sliding swivel joint on a fixed to adjacent camshaft bearing caps Oil pipe is guided.
  • the advantageously small-sized control device according to the invention offers kinematic the advantage of a continuous change in the opening angle, with even small opening angles, large valve lifts with relatively little emigration the contact line between the cam and the contact track of the tilting segment are.
  • the same cylinder head can also be used in an advantageous manner for a valve control with the control device according to the invention and for a Valve control without this control device, in particular with a valve train with two similar, adjacent globe valves if not provided Control device no unnecessary and empty volume is dragged along.
  • a valve control with the control device according to the invention also equipped with a rotation angle adjustment device for spreading the control cam his.
  • a particular advantage of the control device according to the invention is due to the low oscillating mass suitable for high-speed internal combustion engines.
  • a valve control 1 for an internal combustion engine acts Control cam 2 of a camshaft 4 connected to a drive wheel 3 via Tilting segment 5 in a plunger 6 controlling a lift valve 7, with the a contact segment 8 formed by the control cam 2 5 via a circular arc section concentric with the camshaft axis of rotation 9 10 is arranged movably guided in the plunger 6.
  • control device 11 Via one with the tipping segment 5 control device 11 is in drive connection with each valve lift an engagement determining the opening and closing phase of the lift valve 7 the contact track 8 with the flanks of the rotating control cam 2 by a relative to the direction of rotation of the control cam 2 positively controlled in the same and / or opposite direction Pivoting movement according to arrow "A" of the tilting segment 5 is achieved.
  • the control device 11 comprises a valve lift direction according to FIG Arrow "B" over a first sliding rotary joint arranged on the machine housing side 12 and a further sliding swivel joint provided on the tilting segment side 13 guided thrust rocker 14 with one of a control cam-free section the camshaft 4 with play-through control opening 15 on its circumference a controlled actuatable element in / on the camshaft 4 with this co-rotating adjusting device 16 engages such that the valve lift direction according to arrow "B” with the control opening 15 eccentrically Camshaft axis of rotation 9 adjustable thrust arm 14 when rotating Camshaft 4 for each valve lift one of the positive control of the tilting segment 5 Serving, periodic swinging movement according to arrow "A” across the valve stroke direction according to arrow "B” in superposition with a valve stroke direction according to arrow "B” caused pushing movement executes.
  • control breakthrough is used to achieve preferred symmetrical stroke profiles according to FIG 15 in the thrust arm 14 radially symmetrical with a cylindrical Scope designed.
  • This guide ring 20 forms in this adjusting device 16 Control-actuated element described above, which on the circumference of the Tax breakthrough 15 attacks.
  • a sliding block 21 can be arranged, each sliding block 21 with both the control pin 18 and the respective one End face of the adjusting pin 19 via correspondingly adapted sliding surfaces interacts positively and thus flatly.
  • a control device 11 according to the invention of advantageously low construction costs is achieved in particular in the case of similar, adjacent globe valves 7 whose tilt segments 5 mounted in the plungers 6 with a between the Tappets 6 arranged swing arm 22 are connected, which over the Tilting segments 5 swing-guided swing arm 22 in a shaft 23 - figure 5- equipped with the straight, tilt segment sliding pivot 13 on which the thrust rocker 14 common to both lift valves 7 1 and 4 articulated attacks.
  • This arrangement advantageously enables the straight line with the Slide block 24 of the thrust rocker 14 and the storage of this slide block 24 is lubricated on the bearing bush 25 with oil from the oil pipe 26.
  • FIGS. 1, 3 and 6 they are of the same type Lift valves 7 via box lifters 6 with the interposition of hydraulic valve lash adjusters or HVA 27 actuated, of the opposite arranged guide surfaces 28 of each box tappet 6 from the respective HVA 27 provided oil supply channels 29 are extended beyond the HVA respective mouths 30 in the circular arc section accommodating the tilting segment 5 10.
  • This arrangement is advantageously a simple one Lubrication of the tilting segments 5 in the box tappets 6 is achieved.
  • each tilting segment 5 can be made in one piece with respective contact path or one on a separate part 31 Identify trained contact path 8, the separate part 31 with the Tilting segment is in a detachable connection, for example a plug connection.
  • Thrust arm 14 formed in the area of the control opening 15 divided Inclusion of a guide ring 20 formed with radial flanges 32, via the the thrust rocker 14 in an advantageously simple manner relative to the camshaft 4 in is secured in the axial direction.
  • To lubricate the guide ring 20 in the Control opening 15 is a in the thrust arm 14 on the Lubrication area of the straight guide / sliding block 24 of the machine housing side Sliding rotary joint 12 also provided an extended lubrication hole Supply of oil from the oil pipe 26.
  • the camshaft 4 can one end with a rotation angle adjustment device provided in the area of the drive wheel 3 to change the spread between the intake and exhaust cams be provided.
  • a rotary adjustment device 33 is provided, which is a stepless rotary adjustment the control shaft 17 from 0 ° to 180 ° or ⁇ 180 ° and back.
  • This rotary adjustment device 33 can, for example, in the manner of a vane pump designed and hydraulically controlled.
  • each tilt segment 5 by means of the control device 11 controlled such that each tilt segment 5 relative to the direction of rotation of the control cam 2 in opposite directions for the opening area and for the closing area is moved in the same direction.
  • a valve lift curve with a maximum opening angle is achieved in that the control pin 18 of the control shaft 17 over the Rotary adjustment device 33 by the angle of 90 ° from the respective 0 ° position or 180 ° position is rotated, the control pin 18 over the transverse to the valve lift direction "B" straight lines of the 0 ° and the 180 ° position in the direction sliding swivel joint 12 of the thrust arm 14 on the machine housing side is.
  • a valve stroke curve with a minimum opening angle according to one of the dashed lines 7 is the control pin 18 in a diametrical position to the position relevant to the maximum opening angle below the controlled the aforementioned straight line.
  • this selected position of the control pin 18 is caused by the control device 11 that the respective tilting segment 5th is initially moved in the opening direction in the direction of rotation of the control cam 2 to achieve a later opening point and that the tilting segment 5 subsequently is moved in opposite directions in the closing phase of the lift valve 7 to achieve of an earlier closing point.
  • control device 11 With the control device 11 according to the invention, this results in advantageous kinematic structure the advantage of a continuous change in the opening angle between its maximum and minimum value and one accordingly high number of intermediate valve lift curves.

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)

Description

Die Erfindung bezieht sich nach dem Oberbegriff des Patentanspruches 1 auf eine Ventilsteuerung für eine Brennkraftmaschine, bei der ein Steuernocken einer Nockenwelle über ein Kippsegment in einem Stößel auf ein Hubventil steuernd einwirkt, wobei das mit einer vom Steuernocken beaufschlagten Kontaktbahn ausgebildete Kippsegment über einen zur Nockenwellen-Drehachse konzentrischen Kreisbogenabschnitt im Stößel beweglich geführt angeordnet ist derart, daß mittels einer Steuervorrichtung bei jedem Ventilhub ein die Öffnungs- und Schließ-Phase des Hubventils bestimmender Eingriff der Kontaktbahn mit den Flanken des drehenden Steuernockens durch eine relativ zur Drehrichtung des Steuernockens gleichund/oder gegensinnig zwangsgesteuerte Schwenkbewegung des Kippsegmentes erzielt ist.The invention relates to a preamble of claim 1 Valve control for an internal combustion engine, in which a control cam Camshaft acts on a lift valve via a tilting segment in a tappet, wherein the formed with a contact path acted upon by the control cam Tilt segment over a circular arc section concentric to the camshaft axis of rotation is movably guided in the plunger such that by means of a Control device with each valve stroke on the opening and closing phase of the Lifting valve determining engagement of the contact track with the flanks of the rotating Control cam by the same and / or relative to the direction of rotation of the control cam oppositely controlled swivel movement of the tilting segment is achieved.

Die vorbeschriebene Ventilsteuerung ist Gegenstand der EP 0 626 035 B1, wobei mit der in diesem Dokument beschriebenen Ventilsteuerung bei einer Brennkraftmaschine in niedrigeren Drehzahlen kleine Ventil-Öffnungswinkel mit geringer oder kleiner Überschneidung und in hohen Drehzahlen große Ventil-Öffnungswinkel mit viel Überschneidung der Einlaß- und Auslaß-Ventilhubkurven zur Ausbildung einer hohen Gasdynamik erreicht sind. Einlaß- und Auslaß-Ventilhubkurven entsprechend einem Steuernocken sind mit der Erfindung bei gleichsinnig synchron zum jeweiligen Steuernocken gesteuertem Zwischenelement bzw. Kippsegment in Richtung großer Ventilöffnungswinkel und bei gegensinnig synchron gesteuertem Zwischenelement bzw. Kippsegment in Richtung kleiner Ventil-Öffnungswinkel entsprechend änderbar.The valve control described above is the subject of EP 0 626 035 B1, wherein with the valve control described in this document for an internal combustion engine at lower speeds small valve opening angles with little or small overlap and high valve opening angles at high speeds much overlap of the intake and exhaust valve lift curves to form one high gas dynamics are achieved. Intake and exhaust valve lift curves accordingly a control cam with the invention in the same direction in synchronism with each Control cam controlled intermediate element or tilting segment in the direction Large valve opening angle and with the intermediate element controlled in opposite directions or tilting segment in the direction of the small valve opening angle accordingly changeable.

Wie weiter aus den Zeichnungen dieses Dokumentes hervorgeht, ist jede der aufgezeigten und beschriebenen Ventilsteuerungen mit einer Steuervorrichtung kombiniert, die jeweils eine in Querrichtung der Brennkraftmaschine seitlich der jeweiligen Nockenwelle angeordnete Steuerwelle umfaßt. In Verbindung mit den die Steuerbewegungen der Steuerwelle auf die jeweiligen Zwischenelemente übertragenden Übertragungsglieder ergibt sich im Zylinderkopf der Brennkraftmaschine ein zusätzlicher Platzbedarf, der beispielsweise bei gegebenem Ventilwinkel nicht gegeben ist oder zu einem breiter bauenden Zylinderkopf führt.As can further be seen from the drawings in this document, each is shown and described valve controls combined with a control device, each one in the transverse direction of the internal combustion engine to the side of the respective one Camshaft arranged control shaft includes. In conjunction with the tax movements the control shaft on the respective intermediate elements Transmission elements result in an additional in the cylinder head of the internal combustion engine Space requirement, which is not given for example with a given valve angle or leads to a wider cylinder head.

Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemäße Ventilsteuerung derart zu verbessern, daß diese unabhängig von den gegebenen Platzverhältnissen in einem insbesondere gegebenen Zylinderkopf unter einer unverändert beibehaltenen Zylinderkopfhaube anordbar ist.The invention has for its object the generic valve control to improve in such a way that these are independent of the available space in a given cylinder head under an unchanged one Cylinder head cover can be arranged.

Diese Aufgabe ist mit dem Patentanspruch 1 gelöst und zwar dadurch, daß die Steuervorrichtung eine in Ventilhubrichtung über ein maschinengehäuseseitig angeordnetes erstes Schiebe-Drehgelenk und ein kippsegmentseitig vorgesehenes weiteres Schiebe-Drehgelenk geführte Schub-Schwinge umfaßt mit einer von einem steuernockenfreien Abschnitt der Nockenwelle mit Spiel durchsetzten Steuer-Durchbrechung, an deren Umfang ein gesteuert betätigbares Element einer in/an der Nockenwelle mit dieser mitdrehend angeordneten Verstelleinrichtung derart angreift, daß die in Ventilhubrichtung mit der Steuer-Durchbrechung exzentrisch zur Nockenwellen-Drehachse verstellbare Schub-Schwinge bei drehender Nockenwelle zu jedem Ventilhub eine der Zwangssteuerung des Kippsegmentes dienende, periodische Schwingbewegung quer zur Ventilhubrichtung in Überlagerung mit einer in Ventilhubrichtung bewirkten Schubbewegung ausführt. This object is achieved with patent claim 1 in that the Control device one arranged in the valve stroke direction over a machine housing side first sliding swivel joint and another one provided on the tilting segment side Sliding swivel-guided thrust swing arm encircled with one by one control cam-free section of the camshaft with play-through control opening, on the circumference of a controllable element in / on the camshaft engages with this adjusting device, which is also rotated, that eccentrically in the valve stroke direction with the control opening Camshaft axis of rotation adjustable thrust arm with rotating camshaft For each valve stroke, one that controls the tilting segment, periodic swinging movement transverse to the valve stroke direction in superimposition with a executes thrust movement caused in the valve stroke direction.

Für eine Ventilsteuerung mit über Stößel betätigte Hubventile ist mit der Erfindung in vorteilhafter Weise eine kleinbauende Steuervorrichtung zur Veränderung der Ventil-Öffnungswinkel in Bauraum reduzierender Weise dadurch erzielt, daß die Steuerwelle bzw. eine gleichwirkende andere Verstelleinrichtung mit zugehörigen Verstellmitteln in und um die Nockenwelle in enger Nachbarschaft angeordnet sind zum periodischen Schwing-Antrieb einer auf das jeweilige Kippsegment antreibend einwirkenden Schub-Schwinge, die vorzugsweise jenseits der Nockenwelle über ein Schiebe-Drehgelenk auf einem an benachbarten Nockenwellen-Lagerdeckeln fixierten Ölleitungsrohr geführt ist.For a valve control with lift valves actuated by tappet is with the invention in advantageously a small-sized control device for changing the valve opening angle achieved in a space-reducing manner in that the Control shaft or an equivalent other adjusting device with associated Adjustment means are arranged in and around the camshaft in close proximity for periodic oscillation drive one driving on the respective tilting segment acting thrust rocker, which is preferably beyond the camshaft over a Sliding swivel joint on a fixed to adjacent camshaft bearing caps Oil pipe is guided.

Diese innerhalb einer gegebenen Zylinderkopfkontur vorzugsweise innerhalb der Projektion eines Nockenwellen-Antriebsrades schub- und schwingbeweglich geführt angeordnete Schub-Schwinge weist in weiterer Ausgestaltung eine umfänglich geschlossene, radialsymmetrisch mit einem zylindrischen Umfang gestaltete Steuer-Durchbrechung auf zur Erzielung vorteilhaft symmetrischer Ventilhubverläufe. Durch entsprechende Gestaltung der Steuer-Durchbrechung sind bedarfsweise auch unsymmetrische Ventilhub-Verläufe möglich.This within a given cylinder head contour, preferably within the Projection of a camshaft drive wheel guided in a thrust and oscillating manner arranged thrust rocker has a circumference in a further embodiment closed, radially symmetrical control opening with a cylindrical circumference to achieve advantageous symmetrical valve lift profiles. By appropriate design of the tax breakthrough are also necessary asymmetrical valve stroke curves possible.

Eine baulich und kinematisch vorteilhafte Ausgestaltung der Erfindung ist in weiteren Unteransprüchen beschrieben.A structurally and kinematically advantageous embodiment of the invention is further Subclaims described.

Die vorteilhaft kleinbauende, erfindungsgemäße Steuervorrichtung bietet kinematisch den Vorteil einer kontinuierlichen Änderung des Öffnungswinkels, wobei bei bereits kleinen Öffnungswinkeln große Ventilhübe mit relativ geringer Auswanderung der Kontaktlinie zwischen Nocken und Kontaktbahn des Kippsegmentes erzielt sind. Weiter kann in vorteilhafter Weise der gleiche Zylinderkopf Verwendung finden für eine Ventilsteuerung mit der erfindungsgemäßen Steuervorrichtung und für eine Ventilsteuerung ohne diese Steuervorrichtung, wobei insbesondere bei einem Ventiltrieb mit zwei gleichartigen, benachbarten Hubventilen bei nicht vorgesehener Steuervorrichtung kein unnötiges und leeres Bauvolumen mitgeschleppt ist. Schließlich kann eine Ventilsteuerung mit der erfindungsgemäßen Steuervorrichtung auch mit einer Drehwinkelverstell-Einrichtung zur Spreizung der Steuemocken ausgerüstet sein.The advantageously small-sized control device according to the invention offers kinematic the advantage of a continuous change in the opening angle, with even small opening angles, large valve lifts with relatively little emigration the contact line between the cam and the contact track of the tilting segment are. The same cylinder head can also be used in an advantageous manner for a valve control with the control device according to the invention and for a Valve control without this control device, in particular with a valve train with two similar, adjacent globe valves if not provided Control device no unnecessary and empty volume is dragged along. Finally, a valve control with the control device according to the invention also equipped with a rotation angle adjustment device for spreading the control cam his.

Ein besonderer Vorteil der erfindungsgemäßen Steuervorrichtung liegt aufgrund der geringen oszillierenden Masse in der Eignung für hochdrehende Brennkraftmaschinen.A particular advantage of the control device according to the invention is due to the low oscillating mass suitable for high-speed internal combustion engines.

Die Erfindung ist anhand eines in den Zeichnungen dargestellten, bevorzugten Ausführungsbeispiels beschrieben. Es zeigt

Figur 1
ausschnittsweise einen Ventiltrieb mit zwei gleichartigen Hubventilen mit einer für beide gemeinsam wirksamen Steuervorrichtung, deren Steuerwelle einenends der Nockenwelle mit einer Drehverstelleinrichtung verbunden ist und die Nockenwelle andernends zumindest mit einem Antriebsrad ausgerüstet ist,
Figur 2
in perspektivischer Schnittdarstellung durch die Nockenwelle die darin gelagerte Steuerwelle und weitere Elemente der zugehörigen Verstelleinrichtung mit einem in der Schubschwinge geführten Führungsring,
Figur 3
die gleichartigen Hubventile in perspektivischer Ansicht mit Kastenstößein, deren Kippsegmente mit einer gemeinsamen Pendelschwinge in Verbindung stehen,
Figur 4
in perspektivischer Ansicht die Pendelschwinge von unten mit abschnittsweise gezeigter, am kippsegmentseitigen Schiebe-Drehgelenk angelenkter Schub-Schwinge,
Figur 5
die Pendelschwinge in perspektivischer Einzeldarstellung, und
Figur 6
einen Kastenstößel mit Mündungen im Kreisbogenabschnitt der Ölversorgungskanäle für das HVA,
Figur 7
Hubkurven für Ein- und Auslaßventile bei geänderten Öffnungs- und Schließzeitpunkten, erzielt mit der erfindungsgemäßen Ventilsteuerung.
The invention is described with reference to a preferred embodiment shown in the drawings. It shows
Figure 1
a section of a valve train with two identical lift valves with a control device acting jointly for both, the control shaft of which is connected at one end to the camshaft with a rotary adjustment device and the other end of the camshaft is equipped with at least one drive wheel,
Figure 2
a perspective sectional view through the camshaft, the control shaft mounted therein and further elements of the associated adjusting device with a guide ring guided in the thrust arm,
Figure 3
the similar globe valves in perspective view with box butts, the tilting segments of which are connected to a common pendulum swing arm,
Figure 4
a perspective view of the pendulum swinging arm from below with a sliding swing arm shown in sections and articulated on the sliding swivel joint on the tilting segment side,
Figure 5
the pendulum swing arm in a perspective individual representation, and
Figure 6
a box tappet with openings in the circular section of the oil supply ducts for the HVA,
Figure 7
Stroke curves for intake and exhaust valves at changed opening and closing times, achieved with the valve control according to the invention.

Bei einer Ventilsteuerung 1 für eine nicht gezeigte Brennkraftmaschine wirkt ein Steuernocken 2 einer mit einem Antriebsrad 3 verbundenen Nockenwelle 4 über ein Kippsegment 5 in einem Stößel 6 auf ein Hubventil 7 steuernd ein, wobei das mit einer vom Steuernocken 2 beaufschlagten Kontaktbahn 8 ausgebildete Kippsegment 5 über einen zur Nockenwellen-Drehachse 9 konzentrischen Kreisbogenabschnitt 10 im Stößel 6 beweglich geführt angeordnet ist. Über eine mit dem Kippsegment 5 in Antriebsverbindung stehende Steuervorrichtung 11 ist bei jedem Ventilhub ein die Öffnungs- und Schließ-Phase des Hubventils 7 bestimmender Eingriff der Kontaktbahn 8 mit den Flanken des drehenden Steuernockens 2 durch eine relativ zur Drehrichtung des Steuernockens 2 gleich- und/oder gegensinnig zwangsgesteuerte Schwenkbewegung gemäß Pfeil "A" des Kippsegmentes 5 erzielt.A valve control 1 for an internal combustion engine, not shown, acts Control cam 2 of a camshaft 4 connected to a drive wheel 3 via Tilting segment 5 in a plunger 6 controlling a lift valve 7, with the a contact segment 8 formed by the control cam 2 5 via a circular arc section concentric with the camshaft axis of rotation 9 10 is arranged movably guided in the plunger 6. Via one with the tipping segment 5 control device 11 is in drive connection with each valve lift an engagement determining the opening and closing phase of the lift valve 7 the contact track 8 with the flanks of the rotating control cam 2 by a relative to the direction of rotation of the control cam 2 positively controlled in the same and / or opposite direction Pivoting movement according to arrow "A" of the tilting segment 5 is achieved.

Zur aufgabengemäßen Weiterbildung der in der EP 0 626 035 B1 geoffenbarten Ventilsteuerung 1 dahingehend, daß diese unabhängig von den gegebenen Platzverhältnissen in einem vorzugsweise gegebenen, nicht gezeigten Zylinderkopf unter einer unverändert beibehaltenen Zylinderkopfhaube anordbar ist, wird erfindungsgemäß eine abgewandelte Steuervorrichtung 11 vorgeschlagen.For the task-based further development of those disclosed in EP 0 626 035 B1 Valve control 1 in that it is independent of the available space in a preferably given, not shown cylinder head an unchanged cylinder head cover can be arranged according to the invention a modified control device 11 proposed.

Die erfindungsgemäße Steuervorrichtung 11 umfaßt eine in Ventilhubrichtung gemäß Pfeil "B" über ein maschinengehäuseseitig angeordnetes erstes Schiebe-Drehgelenk 12 und ein kippsegmentseitig vorgesehenes weiteres Schiebe-Drehgelenk 13 geführte Schub-Schwinge 14 mit einer von einem steuernockenfreien Abschnitt der Nockenwelle 4 mit Spiel durchsetzten Steuer-Durchbrechung 15, an deren Umfang ein gesteuert betätigbares Element einer in/an der Nockenwelle 4 mit dieser mitdrehend angeordneten Verstelleinrichtung 16 derart angreift, daß die in Ventilhubrichtung gemäß Pfeil "B" mit der Steuer-Durchbrechung 15 exzentrisch zur Nockenwellen-Drehachse 9 verstellbare Schub-Schwinge 14 bei drehender Nockenwelle 4 zu jedem Ventilhub eine der Zwangssteuerung des Kippsegmentes 5 dienende, periodische Schwingbewegung gemäß Pfeil "A" quer zur Ventilhubrichtung gemäß Pfeil "B" in Überlagerung mit einer in Ventilhubrichtung gemäß Pfeil "B" bewirkten Schubbewegung ausführt.The control device 11 according to the invention comprises a valve lift direction according to FIG Arrow "B" over a first sliding rotary joint arranged on the machine housing side 12 and a further sliding swivel joint provided on the tilting segment side 13 guided thrust rocker 14 with one of a control cam-free section the camshaft 4 with play-through control opening 15 on its circumference a controlled actuatable element in / on the camshaft 4 with this co-rotating adjusting device 16 engages such that the valve lift direction according to arrow "B" with the control opening 15 eccentrically Camshaft axis of rotation 9 adjustable thrust arm 14 when rotating Camshaft 4 for each valve lift one of the positive control of the tilting segment 5 Serving, periodic swinging movement according to arrow "A" across the valve stroke direction according to arrow "B" in superposition with a valve stroke direction according to arrow "B" caused pushing movement executes.

Zur Erzielung bevorzugter symmetrischer Hubverläufe gemäß Figur 7 ist die Steuer-Durchbrechung 15 in der Schub-Schwinge 14 radialsymmetrisch mit einem zylindrischen Umfang gestaltet.The control breakthrough is used to achieve preferred symmetrical stroke profiles according to FIG 15 in the thrust arm 14 radially symmetrical with a cylindrical Scope designed.

Eine vorteilhaft wenig Bauraum erfordernde Verstelleinrichtung 16 der Steuervorrichtung 11 umfaßt eine in einer hohlen Nockenwelle 4 koaxial drehbeweglich angeordnete Steuerwelle 17 mit einem exzentrisch angeordneten Steuerzapfen 18 je Schub-Schwinge 14, wobei der Steuerzapfen 18 mit in der Nockenwelle 4 diametral radial beweglich geführt angeordneten Verstellzapfen 19 zusammenwirkt, von denen jeder mit einem hälftigen Abschnitt 20', 20" eines in der Steuer-Durchbrechung 15 der Schub-Schwinge 14 drehgelagerten Führungsringes 20 in fester Verbindung steht. Dieser Führungsring 20 bildet in dieser Verstelleinrichtung 16 das weiter oben beschriebene, gesteuert betätigbare Element, das am Umfang der Steuer-Durchbrechung 15 angreift.An adjusting device 16 of the control device which advantageously requires little installation space 11 comprises a coaxially rotatable in a hollow camshaft 4 arranged control shaft 17 with an eccentrically arranged control pin 18 each thrust rocker 14, the control pin 18 in the camshaft 4 diametrically radially movably arranged adjusting pin 19 cooperates, each with a half section 20 ', 20 "one in the control opening 15 of the thrust arm 14 rotatably mounted guide ring 20 in fixed Connection is established. This guide ring 20 forms in this adjusting device 16 Control-actuated element described above, which on the circumference of the Tax breakthrough 15 attacks.

Soll bei direktem Zusammenwirken von Steuerzapfen 18 und Verstellzapfen 19 eine Linienberührung vermieden werden, kann erfindungsgemäß zwischen dem Steuerzapfen 18 und jedem Verstellzapfen 19 jeweils ein Gleitstein 21 angeordnet sein, wobei jeder Gleitstein 21 sowohl mit dem Steuerzapfen 18 als auch mit der jeweiligen Stirnfläche des Verstellzapfens 19 über entsprechend angepaßte Gleitflächen formschlüssig und damit flächig zusammenwirkt.Should a direct interaction of the control pin 18 and 19 adjustment pin Line contact can be avoided, according to the invention, between the control pin 18 and each adjusting pin 19, a sliding block 21 can be arranged, each sliding block 21 with both the control pin 18 and the respective one End face of the adjusting pin 19 via correspondingly adapted sliding surfaces interacts positively and thus flatly.

Eine erfindungsgemäße Steuervorrichtung 11 von vorteilhaft geringem Bauaufwand ist insbesondere dadurch erreicht, daß bei gleichartigen, benachbarten Hubventilen 7 deren in den Stößeln 6 gelagerten Kippsegmente 5 mit einer zwischen den Stößeln 6 angeordneten Pendelschwinge 22 verbunden sind, wobei die über die Kippsegmente 5 schwinggeführte Pendelschwinge 22 in einem Schacht 23 - Figur 5- mit dem gerad geführten, kippsegmentseitigen Schiebe-Drehgelenk 13 ausgerüstet ist, an dem die für beide Hubventile 7 gemeinsame Schub-Schwinge 14 gemäß Figuren 1 und 4 gelenkig angreift.A control device 11 according to the invention of advantageously low construction costs is achieved in particular in the case of similar, adjacent globe valves 7 whose tilt segments 5 mounted in the plungers 6 with a between the Tappets 6 arranged swing arm 22 are connected, which over the Tilting segments 5 swing-guided swing arm 22 in a shaft 23 - figure 5- equipped with the straight, tilt segment sliding pivot 13 on which the thrust rocker 14 common to both lift valves 7 1 and 4 articulated attacks.

Ein zusätzlich verringerter Bauaufwand unter Nutzung vorhandener Elemente ist ferner mit der erfindungsgemäßen Steuervorrichtung 11 dadurch erreicht, daß die Schub-Schwinge 14 im anderen Endbereich in Ventilhubrichtung gemäß Pfeil "B" jenseits der Nockenwelle 4 über eine gabelartige Geradführung mit einem Kulissenstein 24 des maschinengehäuseseitigen Schiebe-Drehgelenkes 12 in beweglicher Verbindung steht, wobei der Kulissenstein 24 über eine Lagerbuchse 25 auf einem an nicht gezeigten Nockenwellen-Lagerdeckeln fixierten Ölleitungsrohr 26 winkelbeweglich gelagert ist.There is an additional reduced construction effort using existing elements further achieved with the control device 11 according to the invention in that the Thrust rocker 14 in the other end area in the valve lift direction according to arrow "B" beyond the camshaft 4 via a fork-like straight guide with a sliding block 24 of the machine housing-side sliding swivel joint 12 in movable Connection is established, the sliding block 24 via a bearing bush 25 an oil pipe 26 fixed to camshaft bearing caps, not shown is angularly mounted.

Diese Anordnung ermöglicht in vorteilhafter Weise, daß die Geradführung mit dem Kulissenstein 24 der Schub-Schwinge 14 sowie die Lagerung dieser Kulissensteines 24 auf der Lagerbuchse 25 mit Öl aus dem Ölleitungsrohr 26 geschmiert ist.This arrangement advantageously enables the straight line with the Slide block 24 of the thrust rocker 14 and the storage of this slide block 24 is lubricated on the bearing bush 25 with oil from the oil pipe 26.

Wie insbesondere aus den Figuren 1, 3 und 6 ersichtlich, sind die gleichartigen Hubventile 7 über Kastenstößel 6 unter Zwischenschaltung von hydraulischen Ventilspielausgleichselementen bzw. HVA 27 betätigt, wobei von den gegenüberliegend angeordneten Führungsflächen 28 jedes Kastenstößels 6 aus zum jeweiligen HVA 27 vorgesehene Ölversorgungskanäle 29 über das HVA hinaus verlängert sind zu jeweiligen Mündungen 30 im das Kippsegment 5 lagernd aufnehmenden Kreisbogenabschnitt 10. Mit dieser Anordnung ist in vorteilhafter Weise eine einfache Schmierung der Kippsegmente 5 in den Kastenstößeln 6 erzielt.As can be seen in particular from FIGS. 1, 3 and 6, they are of the same type Lift valves 7 via box lifters 6 with the interposition of hydraulic valve lash adjusters or HVA 27 actuated, of the opposite arranged guide surfaces 28 of each box tappet 6 from the respective HVA 27 provided oil supply channels 29 are extended beyond the HVA respective mouths 30 in the circular arc section accommodating the tilting segment 5 10. This arrangement is advantageously a simple one Lubrication of the tilting segments 5 in the box tappets 6 is achieved.

Bezüglich der baulichen Ausgestaltung kann jedes Kippsegment 5 einstückig mit jeweiliger Kontaktbahn gestaltet sein oder aber eine an einem gesonderten Teil 31 ausgebildete Kontaktbahn 8 ausweisen, wobei das gesonderte Teil 31 mit dem Kippsegment in lösbarer Verbindung steht, beispielsweise einer Steckverbindung. With regard to the structural design, each tilting segment 5 can be made in one piece with respective contact path or one on a separate part 31 Identify trained contact path 8, the separate part 31 with the Tilting segment is in a detachable connection, for example a plug connection.

In weiterer erfindungsgemäßer Ausgestaltung der Steuervorrichtung 11 ist die Schub-Schwinge 14 im Bereich der Steuer-Durchbrechung 15 geteilt ausgebildet zur Aufnahme eines mit Radialflanschen 32 ausgebildeten Führungsringes 20, über den die Schub-Schwinge 14 in vorteilhaft einfacher Weise relativ zur Nockenwelle 4 in axialer Richtung lagegesichert ist. Zur Schmierung des Führungsringes 20 in der Steuer-Durchbrechung 15 ist über eine in der Schub-Schwinge 14 über den Schmierbereich der Geradführung/Kulissenstein 24 des maschinengehäuseseitigen Schiebe-Drehgelenkes 12 hinaus eine verlängerte Schmierbohrung vorgesehen zur Zuführung von Öl aus dem Ölleitungsrohr 26.In a further embodiment of the control device 11 according to the invention Thrust arm 14 formed in the area of the control opening 15 divided Inclusion of a guide ring 20 formed with radial flanges 32, via the the thrust rocker 14 in an advantageously simple manner relative to the camshaft 4 in is secured in the axial direction. To lubricate the guide ring 20 in the Control opening 15 is a in the thrust arm 14 on the Lubrication area of the straight guide / sliding block 24 of the machine housing side Sliding rotary joint 12 also provided an extended lubrication hole Supply of oil from the oil pipe 26.

Zur Steigerung der Variabilität der Ventilsteuerung 1 kann die Nockenwelle 4 an einem Ende mit einer im Bereich des Antriebsrades 3 vorgesehenen Drehwinkelverstell-Einrichtung zur Änderung der Spreizung zwischen den Einlaß- und Auslaßnocken vorgesehen sein. Am anderen Ende der Nockenwelle 4 ist für die Steuerwelle 17 eine Drehverstelleinrichtung 33 vorgesehen, die einer stufenlosen Drehverstellung der Steuerwelle 17 von 0° bis 180° oder <180° und zurück ermöglicht. Diese Drehverstelleinrichtung 33 kann beispielsweise nach Art einer Flügelzellenpumpe gestaltet und hydraulisch gesteuert sein.To increase the variability of the valve control 1, the camshaft 4 can one end with a rotation angle adjustment device provided in the area of the drive wheel 3 to change the spread between the intake and exhaust cams be provided. At the other end of the camshaft 4 is for the control shaft 17 a rotary adjustment device 33 is provided, which is a stepless rotary adjustment the control shaft 17 from 0 ° to 180 ° or <180 ° and back. This rotary adjustment device 33 can, for example, in the manner of a vane pump designed and hydraulically controlled.

Unter Bezugnahme auf die Figur 7 sind die durchgehend ausgezogenen Ein- und Auslaß-Ventilhubkurven erzeugt durch die jeweiligen Steuernocken 2 bei unwirksam gesteuerter Steuervorrichtung 11, wobei der Führungsring 20 in der Schub-Schwinge 14 über den Steuerzapfen 18 der in der Nockenwelle 4 konzentrisch angeordneten Steuerwelle 17 zur Drehachse 9 der Nockenwelle 4 koaxial angeordnet ist. Hierbei befindet sich der Steuerzapfen 18 in einer der Endstellungen auf einer quer zur Ventilhubrichtung "B" verlaufenden Geraden in der 0°- oder 180°-Position.With reference to FIG. 7, the continuously drawn in and Exhaust valve lift curves generated by the respective control cam 2 ineffective controlled control device 11, wherein the guide ring 20 in the thrust arm 14 above the control pin 18 which is arranged concentrically in the camshaft 4 Control shaft 17 arranged coaxially with the axis of rotation 9 of the camshaft 4 is. Here, the control pin 18 is in one of the end positions on one Straight lines running perpendicular to the valve stroke direction "B" in the 0 ° or 180 ° position.

Zur Erzielung einer Ventilhubkurve mit vergrößertem Öffnungswinkel gemäß den punktierten Ventilhubkurven in Figur 7 ist jedes Kippsegment 5 mittels der Steuervorrichtung 11 derart gesteuert, daß jedes Kippsegment 5 relativ zur Drehrichtung des Steuernockens 2 für den Öffnungsbereich gegensinnig und für den Schließbereich gleichsinnig bewegt ist. Eine Ventilhubkurve mit maximalem Öffnungswinkel ist hierbei dadurch erreicht, daß der Steuerzapfen 18 der Steuerwelle 17 über deren Drehverstelleinrichtung 33 um den Winkel von 90° aus der jeweiligen 0°-Position oder 180°-Position verdreht ist, wobei der Steuerzapfen 18 über der quer zur Ventilhubrichtung "B" verlaufenden Geraden der 0°- und der 180°-Position in Richtung maschinengehäuseseitigem Schiebe-Drehgelenk 12 der Schub-Schwinge 14 verstellt ist.To achieve a valve lift curve with an enlarged opening angle according to dotted valve lift curves in Figure 7, each tilt segment 5 by means of the control device 11 controlled such that each tilt segment 5 relative to the direction of rotation of the control cam 2 in opposite directions for the opening area and for the closing area is moved in the same direction. A valve lift curve with a maximum opening angle is achieved in that the control pin 18 of the control shaft 17 over the Rotary adjustment device 33 by the angle of 90 ° from the respective 0 ° position or 180 ° position is rotated, the control pin 18 over the transverse to the valve lift direction "B" straight lines of the 0 ° and the 180 ° position in the direction sliding swivel joint 12 of the thrust arm 14 on the machine housing side is.

Bei einem Ventilhubverlauf mit minimalem Öffnungswinkel gemäß einer der gestrichelten Ventilhubkurven der Figur 7 ist der Steuerzapfen 18 in eine diametrale Position zu der für den maximalen Öffnungswinkel relevanten Position unterhalb der vorgenannten Geraden gesteuert. Mit dieser gewählten Stellung des Steuerzapfens 18 wird über die Steuervorrichtung 11 veranlaßt, daß das jeweilige Kippsegment 5 im Öffnungsbereich zunächst in Drehrichtung des Steuernockens 2 mitbewegt wird zur Erzielung eines späteren Öffnungspunktes und daß das Kippsegment 5 anschließend in der Schließ-Phase des Hubventils 7 gegensinnig bewegt wird zur Erzielung eines früheren Schließpunktes.With a valve stroke curve with a minimum opening angle according to one of the dashed lines 7 is the control pin 18 in a diametrical position to the position relevant to the maximum opening angle below the controlled the aforementioned straight line. With this selected position of the control pin 18 is caused by the control device 11 that the respective tilting segment 5th is initially moved in the opening direction in the direction of rotation of the control cam 2 to achieve a later opening point and that the tilting segment 5 subsequently is moved in opposite directions in the closing phase of the lift valve 7 to achieve of an earlier closing point.

Mit der erfindungsgemäßen Steuervorrichtung 11 ergibt sich aufgrund des vorteilhaft kinematischen Aufbaues der Vorteil einer kontinuierlichen Änderung des Öffnungswinkels zwischen dessen maximalen und minimalem Wert und eine dementsprechend hohe Anzahl an Zwischen-Ventilhubkurven.With the control device 11 according to the invention, this results in advantageous kinematic structure the advantage of a continuous change in the opening angle between its maximum and minimum value and one accordingly high number of intermediate valve lift curves.

Claims (11)

  1. A valve control means for an internal combustion engine,
    wherein a control cam (2) on a control shaft (4), via a tilting segment (5) in a push rod (6), actuates a poppet valve (7) wherein
    the tilting segment (5), in the form of a contact path (8) acted upon by the control cam (2), is disposed and guided for movement in the push rod (6), via a circular arcuate portion (10) concentric with the axis of rotation (9) of the camshaft, so that
    by means of a control device (11), at each valve stroke an engagement between the contact path (8) and the flanks of the rotating control cam (2) and determining the opening and closing phases of the poppet valve (7) is obtained by a pivoting motion (arrow "A") of the tilting segment (5) automatically steered in the same direction and/or in the opposite direction relative to the direction of rotation of the control cam (2),
       characterised in that
    the control device (11) comprises a thrust and rocker arm (14) guided in the valve stroke direction (arrow "B") via a first sliding swivel joint (12) disposed on the same side as the engine casing and a second sliding swivel joint (13) on the same side as the tilting segment, the rocker arm being formed with a control aperture (15) extending with clearance from a portion of the camshaft (4) free from the control cam,
    a controllable element (guide ring 20) of an adjusting device (16) disposed in/on and rotating with the camshaft (4) engaging the periphery of the aperture (15) in such a way that
    when the camshaft (4) rotates, at each valve stroke the thrust and rocker arm (14), which is adjustable in the valve stroke direction (arrow "B") via the control aperture (15) eccentrically relative to the axis of rotation (9) of the camshaft, makes a periodic oscillating movement (arrow "A") for automatically steering the tilting segment (5) transversely of the valve stroke direction (arrow "B") and overlapping a thrust movement in the valve stroke direction (arrow "B").
  2. A valve control means according to claim 1, characterised in that the control aperture (15) is radially symmetrical with a cylindrical periphery.
  3. A valve control means according to claim 1 or claim 2, characterised in that
    the adjusting device (16) comprises a control shaft (17) mounted for rotation coaxially in a hollow camshaft (4) with an eccentrically disposed control pin (18), which
    co-operates with an adjusting pin (19) guided for diametral radial movement in the camshaft (4), wherein
    each adjusting pin (19) is firmly connected to a half portion (20', 20") of a guide ring (20) mounted for rotation in the control aperture (15) in the thrust and rocker arm (14).
  4. A valve control means according to claim 3, characterised in that
    a sliding block (21) is disposed between the control pin (18) and each adjusting pin (19), and
    each sliding block (21) positively co-operates with the control pin (18) and also with the respective end face of the adjusting pin (19) via suitably adapted sliding surfaces.
  5. A valve control means according to one or more of claims 1 to 4, characterised in that
    in the case of similar neighbouring poppet valves (7), the tilting segments (5) thereof mounted in the push rods (6) are connected by a swinging rocker arm (22) disposed between the push rods (6), wherein
    the swinging rocker arm (22) guided via the tilting segments (5) for rocking in a shaft (23) is equipped with the sliding swivel joint (13), guided in a straight line on the same side as the tilting segment, a thrust and rocker arm (14) common to both poppet valves (7) pivotably engaging the swivel joint.
  6. A valve control means according to claims 1 to 5, characterised in that
    in the other end region on the other side of the camshaft (4), the thrust and rocker arm (14) is movably connected via a forked straight guide to a link block (24) of the sliding swivel joint (12) on the same side as the engine casing, wherein
    the link block (24) is mounted via a bearing bush (25) for angular motion on an oil-conveying pipe (26) fixed to camshaft bearing covers.
  7. A valve control means according to claim 6, characterised in that the straight guide and the link block (24) of the thrust and rocker arm (14), and also the bearing of the said link guide (24) on the bearing bush (25), are lubricated with oil from the oil pipe (26).
  8. A valve control means according to one or more of claims 1 to 7, characterised in that
    the similar poppet valves (7) are actuated via box push rods (6) with interposition of hydraulic valve-clearance compensating elements (HVA 27), wherein
    oil supply ducts (29) extending from the oppositely disposed guide surfaces (28) of each box push rod (6) to the respective HVA (27) are prolonged beyond the HVA (27) as far as respective mouths (30) in the circular arcuate portion (10) which bears and receives the tilting segment (5).
  9. A valve control means according to any of claims 1 to 8, characterised in that
    the tilting segment (5) has a contact path (8) formed on a separate part (31), wherein
    the separate part (31), which is wear-resistant, is connected, releasably if required, to the tilting segment (5).
  10. A valve control means according to any of claims 1 to 9, characterised in that
    the thrust rocker arm (14) is divided in the neighbourhood of the control aperture (15) in order to receive a guide ring (20) which is formed with radial flanges (32) and
    is supplied with oil from the oil pipe (26) via a lubrication bore which is prolonged in the thrust rocker arm (14) beyond the lubrication region of the straight guide/link block (24).
  11. A valve control means according to claims 1 to 10, characterised in that
    the camshaft (4) is equipped at one end with an angle-of-rotation adjusting device and
    equipped at the other end with a device (33) for rotary adjustment of the camshaft (17) and
    used for stepless rotary adjustment of the control shaft (17) from 0° to 180° or < 180° and back.
EP99924907A 1998-06-05 1999-05-07 Valve timing system for an internal combustion engine Expired - Lifetime EP1084330B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19825307 1998-06-05
DE19825307A DE19825307A1 (en) 1998-06-05 1998-06-05 Valve control for an internal combustion engine
PCT/EP1999/003154 WO1999064729A1 (en) 1998-06-05 1999-05-07 Valve timing system for an internal combustion engine

Publications (2)

Publication Number Publication Date
EP1084330A1 EP1084330A1 (en) 2001-03-21
EP1084330B1 true EP1084330B1 (en) 2002-10-30

Family

ID=7870110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99924907A Expired - Lifetime EP1084330B1 (en) 1998-06-05 1999-05-07 Valve timing system for an internal combustion engine

Country Status (6)

Country Link
US (1) US6382149B1 (en)
EP (1) EP1084330B1 (en)
JP (1) JP4283999B2 (en)
DE (2) DE19825307A1 (en)
ES (1) ES2185349T3 (en)
WO (1) WO1999064729A1 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19911067A1 (en) * 1999-03-12 2000-09-14 Bayerische Motoren Werke Ag Process for forming a crack for breaking a component from a carbon steel
US6786185B2 (en) * 2002-03-14 2004-09-07 Delphi Technologies, Inc. Variable valve actuation mechanism having partial wrap bearings for output cams and frames
JP4342372B2 (en) * 2004-04-28 2009-10-14 本田技研工業株式会社 Valve operating device for internal combustion engine
JP4343021B2 (en) * 2004-04-28 2009-10-14 本田技研工業株式会社 Valve operating device for internal combustion engine
US20080017150A1 (en) * 2004-09-15 2008-01-24 Yamaha Hatsudoki Kabushiki Kaisha Variable Valve Drive Device, Engine, and Motorcycle
FI20080053A0 (en) * 2007-12-12 2008-01-22 Wallac Oy Apparatus and method for adjusting the position of an optical component
DE102009037270B4 (en) 2009-08-10 2011-04-07 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Valve train for internal combustion engines for actuating gas exchange valves
DE102009037268B3 (en) 2009-08-10 2011-04-07 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Variable valve drive for internal combustion engines for actuating gas exchange valves
DE102009037269B4 (en) 2009-08-10 2011-06-01 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Valve train for internal combustion engines for actuating gas exchange valves
JP5569423B2 (en) * 2011-02-09 2014-08-13 トヨタ自動車株式会社 Variable valve operating device for internal combustion engine
DE102011108728B4 (en) 2011-07-27 2013-02-07 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Valve train for internal combustion engines for actuating gas exchange valves
KR101628100B1 (en) * 2014-12-09 2016-06-08 현대자동차 주식회사 Continuous varible vavle duration apparatus and engine provided with the same
KR101637296B1 (en) * 2014-12-09 2016-07-07 현대자동차 주식회사 Continuous varible vavle duration apparatus and engine provided with the same
KR101628088B1 (en) 2015-07-07 2016-06-08 현대자동차 주식회사 Continuous variable vavle duration apparatus and engine provided with the same
KR101664079B1 (en) * 2015-09-24 2016-10-10 현대자동차 주식회사 Continuous variable vavle duration apparatus and engine provided with the same
KR102371229B1 (en) 2016-12-14 2022-03-04 현대자동차 주식회사 Continuous variable vavle timing apparatus and engine provided with the same
KR102371235B1 (en) * 2016-12-15 2022-03-04 현대자동차 주식회사 Continuous variable vavle timing apparatus and engine provided with the same
CN108625924B (en) * 2018-06-15 2023-09-22 吉林大学 Valve timing adjusting mechanism
CN112648040B (en) * 2020-12-22 2022-03-25 东风商用车有限公司 Engine compression release type brake and braking method thereof

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR889861A (en) 1941-06-14 1944-01-21 Saurer Ag Adolph Device for varying the overlapping periods of valve opening in internal combustion engines
GB1311562A (en) * 1969-06-27 1973-03-28 Ass Eng Ltd Device for moving a cam relative to its driving shaft
DE3041864A1 (en) 1980-11-06 1982-05-13 Audi Nsu Auto Union Ag, 7107 Neckarsulm Valve timing adjuster for IC engine - has curved spacer piece between overhead camshaft and valve stem
GB2214567B (en) 1987-12-10 1992-06-24 Martin William Bennett Variable valve timing by rocking cam follower
US5732669A (en) * 1992-12-13 1998-03-31 Bayerische Motoren Werke Aktiengesellschaft Valve control for an internal combustion engine
DE59307123D1 (en) 1992-12-13 1997-09-18 Bayerische Motoren Werke Ag VALVE CONTROL FOR AN INTERNAL COMBUSTION ENGINE
US5515819A (en) * 1994-11-04 1996-05-14 Eaton Corporation Biasing assembly for a variable valve timing mechanism
DE19532334A1 (en) * 1995-09-01 1997-03-06 Bayerische Motoren Werke Ag Variable valve train, especially for internal combustion engines
DE19604943C2 (en) * 1996-02-10 2002-10-02 Daimler Chrysler Ag Device for operating valves of an internal combustion engine
JP3834921B2 (en) * 1997-04-02 2006-10-18 三菱自動車工業株式会社 Variable valve mechanism
DE19825308A1 (en) * 1998-06-05 1999-12-09 Bayerische Motoren Werke Ag Variable valve train for an internal combustion engine
JP2000145422A (en) * 1998-11-05 2000-05-26 Honda Motor Co Ltd Valve unit for multiple-cylinder internal combustion engine
US6135075A (en) * 1999-03-10 2000-10-24 Boertje; Brian H. Variable cam mechanism for an engine
US6293238B1 (en) * 1999-04-07 2001-09-25 Caterpillar Inc. Rocker arm and rocker arm assembly for engines
US6314926B1 (en) * 1999-05-24 2001-11-13 Jenera Enterprises Ltd Valve control apparatus
US6311659B1 (en) * 1999-06-01 2001-11-06 Delphi Technologies, Inc. Desmodromic cam driven variable valve timing mechanism

Also Published As

Publication number Publication date
WO1999064729A1 (en) 1999-12-16
JP2002517669A (en) 2002-06-18
ES2185349T3 (en) 2003-04-16
EP1084330A1 (en) 2001-03-21
DE19825307A1 (en) 1999-12-09
JP4283999B2 (en) 2009-06-24
DE59903259D1 (en) 2002-12-05
US6382149B1 (en) 2002-05-07

Similar Documents

Publication Publication Date Title
EP1084330B1 (en) Valve timing system for an internal combustion engine
EP0761935B1 (en) Variable valve driving gear, particularly for internal combustion engines
DE4322480C2 (en) Device for the variable valve control of internal combustion engines
DE19835921B4 (en) Device for variable valve actuation of a cylinder valve
DE10230108B4 (en) Device for adjusting the stroke of a valve actuated by a camshaft
DE7005077U (en) VALVE CONTROL DEVICE FOR COMBUSTION MACHINERY.
DE4210143C2 (en) Valve drive for an internal combustion engine
DE4404708A1 (en) Valve control device for an internal combustion engine
DE102008015197B4 (en) Valve mechanism of an engine
DE19640520A1 (en) Valve train and cylinder head of an internal combustion engine
DE19851045A1 (en) Arrangement for variable valve operation in IC engine
DE4205230A1 (en) VALVE ACTUATING MECHANISM FOR AN INTERNAL COMBUSTION ENGINE
DE102004057438A1 (en) Gear train consists of tilt lever that operates with gas exchange valve and is connected to push rod that has adjustment system that comprises an adjustable oscillating lever that works with a tappet shaft and cam
DE3831642C2 (en)
DE4112833A1 (en) Variable valve control for IC engine gas exchange valve - has two parallel levers fitted between camshaft cam and valve sheet
EP1375847A2 (en) Variable valve drive
EP1050669B1 (en) Valve driving arrangement with variable lift for an internal combustion engine
DE3041864A1 (en) Valve timing adjuster for IC engine - has curved spacer piece between overhead camshaft and valve stem
DE3520859A1 (en) Internal combustion engine
EP1387048A2 (en) Rocking lever for valve drive with variable lift
EP0686756B1 (en) Valve drive with variable and independent control of the valve opening angle and of the valve lift
DE4300684C2 (en) Valve train for variable control of internal combustion engines
EP0352580B1 (en) Operating system of internal-combustion engine valves
EP1022443B1 (en) Variable valve drive for internal combustion engine
EP0626035A1 (en) Valve control for an internal combustion engine.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20000930

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 20020510

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20021031

REF Corresponds to:

Ref document number: 59903259

Country of ref document: DE

Date of ref document: 20021205

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2185349

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20030731

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20110618

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20120531

Year of fee payment: 14

Ref country code: FR

Payment date: 20120619

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20120529

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20120420

Year of fee payment: 14

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59903259

Country of ref document: DE

Effective date: 20121201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121201

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20130507

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130507

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20140131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130507

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130531

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20140606

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130508