EP1084330B1 - Valve timing system for an internal combustion engine - Google Patents
Valve timing system for an internal combustion engine Download PDFInfo
- 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
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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
- F01L13/0063—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
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- 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
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- 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
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- 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.
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- 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.
- 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Claims (11)
- 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) whereinthe 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 thatby 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),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 thatwhen 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").
- A valve control means according to claim 1, characterised in that the control aperture (15) is radially symmetrical with a cylindrical periphery.
- A valve control means according to claim 1 or claim 2, characterised in thatthe adjusting device (16) comprises a control shaft (17) mounted for rotation coaxially in a hollow camshaft (4) with an eccentrically disposed control pin (18), whichco-operates with an adjusting pin (19) guided for diametral radial movement in the camshaft (4), whereineach 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).
- A valve control means according to claim 3, characterised in thata sliding block (21) is disposed between the control pin (18) and each adjusting pin (19), andeach 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.
- A valve control means according to one or more of claims 1 to 4, characterised in thatin 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), whereinthe 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.
- A valve control means according to claims 1 to 5, characterised in thatin 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, whereinthe link block (24) is mounted via a bearing bush (25) for angular motion on an oil-conveying pipe (26) fixed to camshaft bearing covers.
- 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).
- A valve control means according to one or more of claims 1 to 7, characterised in thatthe similar poppet valves (7) are actuated via box push rods (6) with interposition of hydraulic valve-clearance compensating elements (HVA 27), whereinoil 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).
- A valve control means according to any of claims 1 to 8, characterised in thatthe tilting segment (5) has a contact path (8) formed on a separate part (31), whereinthe separate part (31), which is wear-resistant, is connected, releasably if required, to the tilting segment (5).
- A valve control means according to any of claims 1 to 9, characterised in thatthe 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) andis 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).
- A valve control means according to claims 1 to 10, characterised in thatthe camshaft (4) is equipped at one end with an angle-of-rotation adjusting device andequipped at the other end with a device (33) for rotary adjustment of the camshaft (17) andused for stepless rotary adjustment of the control shaft (17) from 0° to 180° or < 180° and back.
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)
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 |
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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 |
-
1998
- 1998-06-05 DE DE19825307A patent/DE19825307A1/en not_active Withdrawn
-
1999
- 1999-05-07 WO PCT/EP1999/003154 patent/WO1999064729A1/en active IP Right Grant
- 1999-05-07 EP EP99924907A patent/EP1084330B1/en not_active Expired - Lifetime
- 1999-05-07 US US09/701,874 patent/US6382149B1/en not_active Expired - Fee Related
- 1999-05-07 JP JP2000553708A patent/JP4283999B2/en not_active Expired - Fee Related
- 1999-05-07 DE DE59903259T patent/DE59903259D1/en not_active Expired - Lifetime
- 1999-05-07 ES ES99924907T patent/ES2185349T3/en not_active Expired - Lifetime
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 |
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