EP1608850A1 - Device for the variable actuation of the gas exchange valves of internal combustion engines - Google Patents

Device for the variable actuation of the gas exchange valves of internal combustion engines

Info

Publication number
EP1608850A1
EP1608850A1 EP04721164A EP04721164A EP1608850A1 EP 1608850 A1 EP1608850 A1 EP 1608850A1 EP 04721164 A EP04721164 A EP 04721164A EP 04721164 A EP04721164 A EP 04721164A EP 1608850 A1 EP1608850 A1 EP 1608850A1
Authority
EP
European Patent Office
Prior art keywords
cams
valves
adjustment
bolt
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04721164A
Other languages
German (de)
French (fr)
Other versions
EP1608850B1 (en
Inventor
Helmut Schön
Kai-Uwe Keller
Peter Kuhn
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.)
Thyssenkrupp Dynamic Components Teccenter AG
Original Assignee
ThyssenKrupp Automotive 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
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Application filed by ThyssenKrupp Automotive AG filed Critical ThyssenKrupp Automotive AG
Publication of EP1608850A1 publication Critical patent/EP1608850A1/en
Application granted granted Critical
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Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005—Deactivating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F01L2013/0068—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers
    • 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
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Definitions

  • the invention relates to a device for variable actuation of the gas exchange valves of internal combustion engines according to the preamble of claim 1.
  • Such devices are used to design the control of gas exchange valves so that it becomes possible to operate reciprocating engines without the otherwise usual throttle valve.
  • Such a device is known for example from DE 101 23 1 86 A1.
  • a rotating cam first drives an intermediate link, which carries out an oscillating, pure rotary movement and carries a control cam, which is composed of a latching area and a stroke area.
  • the control curve transfers the stroke curve required to actuate the valve to the role of a rocker arm-like output member, which in turn actuates the valve.
  • the desired, different valve lift curves are generated in that the center of rotation of the intermediate member is shifted on an arc-shaped path which is concentric with the role of the driven member in its position when the valve is closed.
  • the center of rotation is formed by a roller provided on the intermediate link, which is non-positively connected to an arc-shaped track in the housing supports, which is also concentric to the role of the output member, that is, an Aquidistante to the path of the turning center and which is referred to as the backdrop.
  • the roller attached to the intermediate link is supported on a cam disc, the angular position of which determines the position of the center of rotation on its arc-shaped path.
  • the object on which the present invention is based is to create a device which, with the saving of a separate adjusting device, is simple and with few components.
  • the bolt on which the intermediate members are mounted is simultaneously designed as an adjusting shaft.
  • the bolt on which the intermediate members are mounted is simultaneously designed as an adjusting shaft.
  • it is provided with cams and can be freely rotated or stored in pendulum supports, in a four-bar linkage or in a slide.
  • the cams are non-rotatably attached to the bolt.
  • the cams are supported directly or indirectly in the housing. With direct support, in the housing Sliders for the cams are made of a material of increased strength.
  • the desired valve lift curve is set by rotating the adjusting shaft with a suitable adjusting means, for example an adjusting motor.
  • adjusting means for example an adjusting motor
  • the bolt or the control shaft moves parallel to itself during the adjusting movement
  • a connecting element must be arranged between the two, which permits this shift.
  • this can be a cardan shaft, a Schmidt clutch, an Oldham clutch or a gear or chain gear.
  • a lever mechanism is also suitable for hydraulic actuation.
  • the device according to the invention can be provided including an adjusting motor or an adjusting device for all intake or exhaust valves of a cylinder head. If the intake and exhaust valves of a cylinder head are actuated by a common camshaft, the device according to the invention, including an adjustment motor or an adjustment device, can be provided for all intake and exhaust valves of a cylinder head.
  • the device according to the invention, including an adjusting motor or an adjusting device can be provided separately for each valve of an engine, so that any combinations of valve strokes or opening angles of the individual valves of an engine are possible, including the deactivation of individual cylinders. As a rule, however, a common adjustment of several valves will be provided.
  • one or more additional gear elements are arranged between the cam and the intermediate element.
  • variable valve control ie also the device according to the invention, to keep the adjustment performance low and because this is higher in the loaded state of the device or its sliding joints and joints than in the non-energized state, which largely with the valve closed there is an adjustment according to the invention provided essentially during the common rest phases of all valves to be adjusted together. These are derived from the signal from the crankshaft and the camshaft and become shorter and shorter the more valves are adjusted together. Their number is therefore limited.
  • the joint adjustment of the intake and exhaust valves of only one cylinder results in long, easy-to-adjust rest phases.
  • it also enables individual load control of the individual cylinders with an adjustment strategy according to the invention such that the torques of the individual cylinders are regulated for each load state of the overall engine. This is particularly important in the lower load range for quiet engine operation, since the valve lifts do not normally correspond sufficiently due to tolerances.
  • the signals required for this adjustment strategy are also supplied by the crankshaft angle encoder and assigned to the individual cylinders by the camshaft angle encoder.
  • the solution according to the invention achieves the advantage of creating a secure adjusting device for gas exchange valves with simple components. In addition, a sensitive adjustment is advantageously achieved.
  • Fig. 2 shows a cross section using the parts shown in Fig.1 with a pendulum support and adjusting shaft
  • Fig. 3 is a perspective view of the device according to the invention with a pendulum support and the bolt as an adjusting shaft
  • Fig. 4 schematically shows the interaction of engine management, accelerator pedal, angle encoder, adjusting motors and battery.
  • Fig. 1 shows a camshaft 1 which carries a cam 2. This moves the roller 3 in the end region of the intermediate member 4.
  • the roller 3 is rotatably attached to the intermediate member 4, which has a one-piece base body.
  • the intermediate member 4 has a control cam 5, which is composed of a locking area 5a and a lifting area 5b.
  • the intermediate member 4 is mounted on a bolt 6, the axis 7 of which is guided on an arc-shaped adjusting curve 8.
  • the center of the arc-shaped adjustment curve 8 lies on the axis 9 of the roller 1 0 of the output member 1 1, which is supported via a joint 1 2 in the housing, not shown, and actuates the valve 1 3. It is clearly evident that an adjustment of the axis 7 on the adjustment curve 8 in the direction of the arrow 14 results in a reduction in the opening angle and stroke of the valve 1 3.
  • Fig. 2 shows an embodiment in which the bolt 6 or its axis 7 is guided in a form-fitting manner on the circular-shaped adjustment curve 8 by a pendulum support 15.
  • the cylinder head-side joint 1 6 of the pendulum support 1 5 or its axis coincides with the axis 9 of the roller 1 0 of the output member 1 1.
  • the adjusting shaft 1 7 carries cams 1 8, which determine the position of the bolt 6 or its axis 7 on the adjusting curve 8 via tappet 1 8a.
  • An adjustment of the axis 7 on the adjustment curve 8, as shown by the direction arrow 14, is caused by a rotation of the cam disk S or the adjustment shaft 17 according to the direction arrow 14a.
  • the adjustment movement described results in a reduction in the stroke and opening angle of the valve 13. If the constructive If conditions allow (e.g. installation space), the plunger 18a can also be dispensed with and the cam disks 18 can act directly on the bolt 6.
  • Fig. 3 shows a perspective view of the device according to the invention with pendulum support 15 for intake valve 19 and exhaust valve 20 of a cylinder, picked out from a series of cylinders or valves.
  • the cylinder head-side joint 16 of the pendulum support 15 can be clearly seen, the axis of which coincides with the axis 9 of the rollers 10 of the output members 11, so that the bolt 6 is positively guided on an arc-shaped adjustment curve.
  • the bolt 6 here simultaneously takes on the function of the adjusting shaft. It carries the cams 18 which are supported on hardened sliders 21 mounted in the housing and is rotatable in the pendulum support.
  • the bolt 6 is connected to the adjusting motor 23 fixed to the housing via a suitable connecting element.
  • an articulated shaft 22 serves as a connecting element.
  • This embodiment offers considerable advantages with regard to the variety of parts, but also space in the area of the actual valve control. Since other connecting elements, such as Schmitt couplings, Oldham couplings, toothed and chain drives, are also possible in addition to cardan shafts, there is a certain flexibility for accommodating the adjusting motor 23.
  • FIG. 4 schematically shows the interaction of accelerator pedal 40, adjusting motors 23, angle of rotation sensor 42 on the flywheel and angle of rotation sensor 43 on the camshaft with engine management 44.
  • a signal emanating from accelerator pedal 40 or a sensor for its position is converted into a signal by engine management 44 the adjusting motors 23 are converted to increase or decrease the valve strokes.
  • the engine management 44 evaluates the signals of the high-resolution rotation angle sensor 42 on the flywheel. These will assigned to the individual cylinders with the aid of the low-resolution angle of rotation sensor 43 on the camshaft or on another shaft running at half the crankshaft speed.
  • signals are sent to the individual adjusting motors 23 for leveling the torque peaks or the crankshaft speed by correcting the valve strokes of the cylinders with smaller torques upwards and those of the cylinders with larger torques downwards.
  • adjustment takes place, with or without compensation, during the common rest phases of the valves operated by an adjusting motor.
  • the engine management 44 also takes their phase position from the sensor 43 on the camshaft.

Abstract

The valve operating device has a camshaft (1) rotated in dependence on the engine revs, fitted with cams (2), used for operation of respective gas changing valves (13) via intermediate cam elements (4) and valve drive elements (11). The intermediate cam elements are fitted to a bolt (6), defining the rotation axis (7) for the intermediate cam elements, which can be displaced parallel to a setting curve (8) under control of a setting shaft.

Description

Vorrichtung zur variablen Betätigung der Gaswechselventile von VerbrennungsmotorenDevice for variable actuation of the gas exchange valves of internal combustion engines
Beschreibungdescription
Die Erfindung betrifft eine Vorrichtung zur variablen Betätigung der Gaswechselventile von Verbrennungsmotoren entsprechend dem Oberbegriff des Anspruchs 1 .The invention relates to a device for variable actuation of the gas exchange valves of internal combustion engines according to the preamble of claim 1.
Derartige Vorrichtungen dienen dazu, die Steuerung von Gaswechselventilen so zu gestalten, dass es möglich wird, Hubkolbenmotoren ohne die sonst übliche Drosselklappe zu betreiben.Such devices are used to design the control of gas exchange valves so that it becomes possible to operate reciprocating engines without the otherwise usual throttle valve.
Eine derartige Vorrichtung ist beispielsweise aus der DE 101 23 1 86 A1 bekannt. Bei dieser Vorrichtung treibt ein umlaufender Nocken zunächst ein Zwischenglied an, welches eine oszillierende, reine Drehbewegung ausführt und eine Steuerkurve trägt, die aus einem Rastbereich und einem Hubbereich zusammengesetzt ist. Die Steuerkurve überträgt die zur Betätigung des Ventils notwendige Hubkurve auf die Rolle eines schlepphebelartigen Abtriebsgliedes, welches seinerseits das Ventil betätigt. Die gewünschten, unterschiedlichen Ventilhubkurven werden dadurch erzeugt, dass das Drehzentrum des Zwischengliedes auf einer kreisbogenförmigen Bahn verschoben wird, die zur Rolle des Abtriebsgliedes in deren Lage bei geschlossenem Ventil konzentrisch ist. Das Drehzentrum wird durch eine am Zwischenglied vorgesehene Rolle gebildet, die sich auf eine kreisbogenförmige Laufbahn im Gehäuse kraftschlüssig abstützt, die ebenfalls zur Rolle des Abtriebsgliedes konzentrisch liegt, also eine Aquidistante zur Bahn des Drehzentrums bildet und die als Kulisse bezeichnet wird. Zusätzlich stützt sich die am Zwischenglied angebrachte Rolle an einer Kurvenscheibe ab, deren Winkelstellung die Lage des Drehzentrums auf seiner kreisbogenförmigen Bahn festlegt.Such a device is known for example from DE 101 23 1 86 A1. In this device, a rotating cam first drives an intermediate link, which carries out an oscillating, pure rotary movement and carries a control cam, which is composed of a latching area and a stroke area. The control curve transfers the stroke curve required to actuate the valve to the role of a rocker arm-like output member, which in turn actuates the valve. The desired, different valve lift curves are generated in that the center of rotation of the intermediate member is shifted on an arc-shaped path which is concentric with the role of the driven member in its position when the valve is closed. The center of rotation is formed by a roller provided on the intermediate link, which is non-positively connected to an arc-shaped track in the housing supports, which is also concentric to the role of the output member, that is, an Aquidistante to the path of the turning center and which is referred to as the backdrop. In addition, the roller attached to the intermediate link is supported on a cam disc, the angular position of which determines the position of the center of rotation on its arc-shaped path.
Es sind weitere Vorrichtungen der gattungsgemäßen Art bekannt geworden, bei welchen der Drehmittelpunkt der vom Nocken angetriebenen Zwischenglieder auf einer Kreisbahn verstellt werden soll (OS 195 32 334 A1 ; EP 0717 174 A1 ; DE 101 64 493). Die Vorveröffentlichungen enthalten jedoch keine Lehre zur konstruktiven Realisierung einer derartigen Verstellung.Other devices of the generic type have become known in which the center of rotation of the intermediate elements driven by the cam is to be adjusted on a circular path (OS 195 32 334 A1; EP 0717 174 A1; DE 101 64 493). However, the previous publications do not contain any teaching on the constructive implementation of such an adjustment.
Allen bekannten Vorrichtungen ist der Nachteil gemeinsam, dass für die Verstellung des Drehmittelpunktes der vom Nocken angetriebenen Zwischenglieder eine separate Versteilvorrichtung erforderlich ist. Diese Versteilvorrichtung wird nach dem Stand der Technik beispielsweise durch eine Verstellnockenwelle, welche im Gehäuse gelagert ist, ausgeführt.All known devices have the disadvantage in common that a separate adjusting device is required to adjust the center of rotation of the intermediate elements driven by the cam. According to the prior art, this adjusting device is designed, for example, by means of an adjusting camshaft which is mounted in the housing.
Die der vorliegenden Erfindung zugrunde liegende Aufgabe besteht darin, eine Vorrichtung zu schaffen, welche unter Einsparung einer separaten Verstellvorrichtung einfach und mit wenigen Bauteilen aufgebaut ist.The object on which the present invention is based is to create a device which, with the saving of a separate adjusting device, is simple and with few components.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Aus- und Weiterbildungen sind in den Ansprüchen 2 bis 21 beschrieben. Vorzugsweise wird der Bolzen, auf dem die Zwischenglieder gelagert sind, gleichzeitig als Verstellwelle ausgebildet. Zu diesem Zweck wird er mit Kurvenscheiben versehen und frei drehbar oder in Pendelstützen, in einem Gelenkviereck oder in einem Schieber gelagert. Die Kurvenscheiben sind drehfest auf dem Bolzen befestigt. Die Kurvenscheiben stützen sich direkt oder indirekt im Gehäuse ab. Bei direkter Abstützung können im -Gehäuse Gleitstücke für die Kurvenscheiben aus einem Material erhöhter Festigkeit vorgesehen werden. Durch Verdrehung der Verstellwelle mit einem geeigneten Verstellmittel, beispielsweise einem Versteilmotor, wird die gewünschte Ventilhubkurve eingestellt. Da das Verstellmittel, beispielsweise ein Versteilmotor, in der Regel gehäusefest angeordnet sein wird, der Bolzen, bzw. die Steuerwelle sich aber bei der Verstellbewegung parallel zu sich selbst verlagert, muss zwischen beiden ein Verbindungselement angeordnet werden, welches diese Verlagerung zulässt. Dieses kann je nach Bauraumbedingungen eine Gelenkwelle, eine Schmidt-Kupplung, eine Oldham-Kupplung oder auch ein Zahnrad- oder Kettengetriebe sein. Bei hydraulischer Betätigung bietet sich auch ein Hebelmechanismus an.This object is achieved according to the invention by the features of claim 1. Advantageous training and further developments are described in claims 2 to 21. Preferably, the bolt on which the intermediate members are mounted is simultaneously designed as an adjusting shaft. For this purpose it is provided with cams and can be freely rotated or stored in pendulum supports, in a four-bar linkage or in a slide. The cams are non-rotatably attached to the bolt. The cams are supported directly or indirectly in the housing. With direct support, in the housing Sliders for the cams are made of a material of increased strength. The desired valve lift curve is set by rotating the adjusting shaft with a suitable adjusting means, for example an adjusting motor. Since the adjusting means, for example an adjusting motor, will generally be arranged fixed to the housing, but the bolt or the control shaft moves parallel to itself during the adjusting movement, a connecting element must be arranged between the two, which permits this shift. Depending on the installation space, this can be a cardan shaft, a Schmidt clutch, an Oldham clutch or a gear or chain gear. A lever mechanism is also suitable for hydraulic actuation.
Die erfindungsgemäße Vorrichtung kann einschließlich eines Versteilmotors bzw. einer Verstellvorrichtung für alle Ein- oder Auslassventile eines Zylinderkopfes vorgesehen werden. Werden die Ein- und Auslassventile eines Zylinderkopfes von einer gemeinsamen Nockenwelle betätigt, so kann die erfindungsgemäße Vorrichtung einschließlich eines Verstellmotors bzw. einer Verstellvorrichtung für alle Ein- und Auslassventile eines Zylinderkopfes vorgesehen werden. Die erfindungsgemäße Vorrichtung kann einschließlich eines VerStellmotors bzw. einer Verstellvorrichtung für jedes Ventil eines Motors separat vorgesehen werden, sodass beliebige Kombinationen von Ventilhüben bzw. Öffnungswinkeln der einzelnen Ventile eines Motors möglich sind, einschließlich der Abschaltung einzelner Zylinder. In der Regel wird man aber eine gemeinsame Verstellung mehrerer Ventile vorsehen. Dies gilt insbesondere bei mehrventiligen Motoren für die Ein- und Auslassventile eines Zylinders. Beispielsweise können zwei Einlassventile von einem Nocken über ein Zwischenglied betätigt werden, welches für jedes Ventil eine Steuerkurve aufweist. Da nur ein Zwischenglied und nur ein Bolzen vorhanden ist, werden beide Ventile gemeinsam und gleichartig verstellt. Erfindungsgemäß können an dem gemeinsamen Zwischenglied aber auch zwei unterschiedliche Steuerkurven vorgesehen werden mit dem Ergebnis unterschiedlicher Hubkurven an beiden Ventilen trotz gemeinsamer Verstellung. Diese Variante eröffnet insbesondere im untersten Lastbereich die Möglichkeit der Öffnung nur noch eines der beiden Ventile. Der besondere Vorteil dieser Möglichkeit liegt darin, dass im untersten Lastbereich sehr kleine Querschnitte freigegeben werden müssen und sich diese genauer einhalten lassen, wenn sie nur durch ein Ventil freigegeben werden. Zusätzlich besteht die Möglichkeit, durch die Öffnung nur eines der Einlassventile einen Drall der Zylinderladung zu erzeugen. Die Möglichkeiten der Erzeugung unterschiedlicher Ventilhubkurven für zwei Ein- oder auch Auslassventile eines Zylinders werden erfindungsgemäß dadurch erweitert, dass zwei unterschiedliche Nocken und zwei Zwischenglieder mit unterschiedlichen Steuerkurven verwendet werden. Dennoch können beide Ventile gemeinsam verstellt werden, da die beiden Zwischenglieder auf einem gemeinsamen Bolzen gelagert sein können.The device according to the invention can be provided including an adjusting motor or an adjusting device for all intake or exhaust valves of a cylinder head. If the intake and exhaust valves of a cylinder head are actuated by a common camshaft, the device according to the invention, including an adjustment motor or an adjustment device, can be provided for all intake and exhaust valves of a cylinder head. The device according to the invention, including an adjusting motor or an adjusting device, can be provided separately for each valve of an engine, so that any combinations of valve strokes or opening angles of the individual valves of an engine are possible, including the deactivation of individual cylinders. As a rule, however, a common adjustment of several valves will be provided. This applies particularly to multi-valve engines for the intake and exhaust valves of a cylinder. For example, two intake valves can be actuated by a cam via an intermediate link which has a control curve for each valve. Since there is only one intermediate link and only one pin, both valves are adjusted together and in the same way. According to the invention, however, two different ones can also be used on the common intermediate link Control cams are provided with the result of different lift curves on both valves despite common adjustment. This variant opens the possibility of opening only one of the two valves, particularly in the lowest load range. The particular advantage of this option is that very small cross-sections must be released in the lowest load range and these can be adhered to more precisely if they are only released by a valve. In addition, there is the possibility of generating a swirl of the cylinder charge by opening only one of the intake valves. The possibilities of generating different valve lift curves for two intake or exhaust valves of a cylinder are expanded according to the invention in that two different cams and two intermediate links with different control curves are used. Nevertheless, both valves can be adjusted together, since the two intermediate links can be mounted on a common pin.
Soweit es aus baulichen (konstruktiven) Gründen (z.B. zur Positionierung der Nockenwelle in einer gewünschten Position) erforderlich ist, können z.B. zwischen Nocken und Zwischenglied ein oder mehrere weitere zusätzliche Getriebeglieder angeordnet werden.As far as it is necessary for structural reasons (e.g. for positioning the camshaft in a desired position), e.g. one or more additional gear elements are arranged between the cam and the intermediate element.
Es ist weiter möglich, die Zwischenglieder einer größeren Zahl parallel liegender Ventile gemeinsam durch einen Versteilmotor bzw. Mechanismus zu verstellen, insbesondere dann, wenn diese auf einen gemeinsamen Bolzen gelagert sind.It is also possible to adjust the intermediate links of a large number of parallel valves together by means of an adjusting motor or mechanism, in particular if they are mounted on a common pin.
Da es für die Akzeptanz einer variablen Ventilsteuerung, also auch der erfindungsgemäßen Vorrichtung von großer Bedeutung ist, die Verstellleistung gering zu halten und weil diese im belasteten Zustand der Vorrichtung bzw. deren Gleitfugen und Gelenke höher ist als im kraftfreien Zustand, der bei geschlossenem Ventil weitgehend vorliegt, ist erfindungsgemäß eine Verstel- lung im Wesentlichen während der gemeinsamen Ruhephasen aller gemeinsam zu verstellender Ventile vorgesehen. Diese werden vom Signal der Kurbelwelle und der Nockenwelle abgeleitet und werden immer kürzer, je mehr Ventile gemeinsam verstellt werden. Deren Zahl ist also begrenzt.Since it is of great importance for the acceptance of a variable valve control, ie also the device according to the invention, to keep the adjustment performance low and because this is higher in the loaded state of the device or its sliding joints and joints than in the non-energized state, which largely with the valve closed there is an adjustment according to the invention provided essentially during the common rest phases of all valves to be adjusted together. These are derived from the signal from the crankshaft and the camshaft and become shorter and shorter the more valves are adjusted together. Their number is therefore limited.
Die gemeinsame Verstellung der Ein- bzw. Auslassventile jeweils nur eines Zylinders ergeben lange, verstellfreundliche Ruhephasen. Sie ermöglicht aber auch eine individuelle Laststeuerung der einzelnen Zylinder mit einer erfindungsgemäßen Verstellstrategie derart, dass für jeden Lastzustand des Gesamtmotors die Drehmomente der einzelnen Zylinder geregelt werden. Dies ist insbesondere im unteren Lastbereich für einen ruhigen Motorlauf wesentlich, da toleranzbedingt die Ventilhübe normalerweise nicht genügend übereinstimmen. Die für diese Verstellstrategie erforderlichen Signale werden ebenfalls vom Drehwinkelgeber der Kurbelwelle geliefert und vom Drehwinkelgeber der Nockenwelle den einzelnen Zylindern zugeordnet.The joint adjustment of the intake and exhaust valves of only one cylinder results in long, easy-to-adjust rest phases. However, it also enables individual load control of the individual cylinders with an adjustment strategy according to the invention such that the torques of the individual cylinders are regulated for each load state of the overall engine. This is particularly important in the lower load range for quiet engine operation, since the valve lifts do not normally correspond sufficiently due to tolerances. The signals required for this adjustment strategy are also supplied by the crankshaft angle encoder and assigned to the individual cylinders by the camshaft angle encoder.
Durch die erfindungsgemäße Lösung wird der Vorteil erzielt, mit einfachen Bauelementen eine sichere Versteileinrichtung für Gaswechselventile zu schaffen. Darüber hinaus vorteilhaft wird eine feinfühlige Verstellung erreicht.The solution according to the invention achieves the advantage of creating a secure adjusting device for gas exchange valves with simple components. In addition, a sensitive adjustment is advantageously achieved.
Die Erfindung wird nun anhand der Zeichnungen einiger Ausführungsbeispiele näher erläutert. Es zeigtThe invention will now be explained in more detail with reference to the drawings of some exemplary embodiments. It shows
Fig. 1 die in den Kraftfluss von der Nockenwelle zum Ventil eingeschalteten, beweglichen Teile der gattungsbildenden VorrichtungFig. 1, the switched in the power flow from the camshaft to the valve, moving parts of the generic device
Fig. 2 einen Querschnitt unter Verwendung der in Fig.1 dargestellten Teile mit Pendelstütze und Verstellwelle Fig. 3 eine perspektivische Darstellung der erfindungsgemäßen Vorrichtung mit Pendelstütze und dem Bolzen als VerstellwelleFig. 2 shows a cross section using the parts shown in Fig.1 with a pendulum support and adjusting shaft Fig. 3 is a perspective view of the device according to the invention with a pendulum support and the bolt as an adjusting shaft
Fig.4 schematisch das Zusammenwirken von Motormanagement, Gaspedal, Drehwinkelgeber, Versteilmotoren und Batterie.Fig. 4 schematically shows the interaction of engine management, accelerator pedal, angle encoder, adjusting motors and battery.
Fig. 1 zeigt eine Nockenwelle 1 , die einen Nocken 2 trägt. Dieser bewegt die Rolle 3 im Endbereich des Zwischengliedes 4. Die Rolle 3 ist drehbar am Zwischenglied 4, welches einen einteiligen Grundkörper aufweist, befestigt. Das Zwischenglied 4 weist eine Steuerkurve 5 auf, die aus einem Rastbereich 5a und einem Hubbereich 5b zusammengesetzt ist. Das Zwischenglied 4 ist auf einem Bolzen 6 gelagert, dessen Achse 7 auf einer kreisbogenförmigen Verstellkurve 8 geführt ist. Der Mittelpunkt der kreisbogenförmigen Verstellkurve 8 liegt auf der Achse 9 der Rolle 1 0 des Abtriebsgliedes 1 1 , welches sich über ein Gelenk 1 2 im nicht dargestellten Gehäuse abstützt und das Ventil 1 3 betätigt. Es ist klar ersichtlich, dass eine Verstellung der Achse 7 auf der Verstellkurve 8 in Richtung des Pfeils 14 eine Verringerung von Öffnungswinkel und Hub des Ventils 1 3 zur Folge hat.Fig. 1 shows a camshaft 1 which carries a cam 2. This moves the roller 3 in the end region of the intermediate member 4. The roller 3 is rotatably attached to the intermediate member 4, which has a one-piece base body. The intermediate member 4 has a control cam 5, which is composed of a locking area 5a and a lifting area 5b. The intermediate member 4 is mounted on a bolt 6, the axis 7 of which is guided on an arc-shaped adjusting curve 8. The center of the arc-shaped adjustment curve 8 lies on the axis 9 of the roller 1 0 of the output member 1 1, which is supported via a joint 1 2 in the housing, not shown, and actuates the valve 1 3. It is clearly evident that an adjustment of the axis 7 on the adjustment curve 8 in the direction of the arrow 14 results in a reduction in the opening angle and stroke of the valve 1 3.
Fig. 2 zeigt eine Ausführungsform, bei der der Bolzen 6 bzw. dessen Achse 7 durch eine Pendelstütze 1 5 formschlüssig auf der kreisbogenförmigen Verstellkurve 8 geführt ist. Das zylinderkopfseitige Gelenk 1 6 der Pendelstütze 1 5 bzw. dessen Achse fällt mit der Achse 9 der Rolle 1 0 des Abtriebsgliedes 1 1 zusammen. Die Verstellwelle 1 7 trägt Kurvenscheiben 1 8, die über Stößel 1 8a die Lage des Bolzens 6 bzw. seiner Achse 7 auf der Verstellkurve 8 festlegen. Eine Verstellung der Achse 7 auf der Verstellkurve 8, wie durch den Richtungspfeil 1 4 dargestellt, wird durch eine Verdrehung der Kurvenscheibel S bzw. der Verstellwelle 1 7 entsprechend dem Richtungspfeil 14a hervorgerufen. Die beschriebene Verstellbewegung hat eine Verringerung von Hub und Öffnungswinkel des Ventils 1 3 zur Folge. Wenn die konstruktiven Rahmenbedingungen (z.B. Bauraum) es zulassen, kann auf den Stößel 18a auch verzichtet werden und die Kurvenscheiben 18 können direkt auf den Bolzen 6 einwirken.Fig. 2 shows an embodiment in which the bolt 6 or its axis 7 is guided in a form-fitting manner on the circular-shaped adjustment curve 8 by a pendulum support 15. The cylinder head-side joint 1 6 of the pendulum support 1 5 or its axis coincides with the axis 9 of the roller 1 0 of the output member 1 1. The adjusting shaft 1 7 carries cams 1 8, which determine the position of the bolt 6 or its axis 7 on the adjusting curve 8 via tappet 1 8a. An adjustment of the axis 7 on the adjustment curve 8, as shown by the direction arrow 14, is caused by a rotation of the cam disk S or the adjustment shaft 17 according to the direction arrow 14a. The adjustment movement described results in a reduction in the stroke and opening angle of the valve 13. If the constructive If conditions allow (e.g. installation space), the plunger 18a can also be dispensed with and the cam disks 18 can act directly on the bolt 6.
Fig. 3 zeigt eine perspektivische Darstellung der erfindungsgemäßen Vorrichtung mit Pendelstütze 15 für Einlassventil 19 und Auslassventil 20 eines Zylinders, herausgegriffen aus einer Reihe von Zylindern bzw. Ventilen. Gut zu erkennen ist das zylinderkopfseitige Gelenk 16 der Pendelstütze 15, dessen Achse mit der Achse 9 der Rollen 10 der Abtriebsglieder 1 1 zusammenfällt, sodass der Bolzen 6 auf einer kreisbogenförmigen Verstellkurve zwangsgeführt ist. Im Unterschied zu der Ausführungsform nach Fig. 2 übernimmt hier der Bolzen 6 erfindungsgemäß gleichzeitig die Funktion der Verstellwelle. Er trägt die Kurvenscheiben 18, die sich auf im Gehäuse angebrachte, gehärtete Gleitstücke 21 abstützen und ist in der Pendelstütze drehbar. Über ein geeignetes Verbindungselement ist der Bolzen 6 mit dem gehäusefesten Versteilmotor 23 verbunden. Im vorliegenden Beispiel dient eine Gelenkwelle 22 als Verbindungselement. Diese Ausführungsform bietet erhebliche Vorteile bezüglich Teilevielfalt, aber auch Bauraum im Bereich der eigentlichen Ventilsteuerung. Da außer Gelenkwellen auch andere Verbindungselemente, wie Schmitt-Kupplungen, Oldham-Kupplungen, Zahn- und Kettgetriebe, in Frage kommen, ist eine gewisse Flexibilität für die Unterbringung des Verstellmotors 23 gegeben.Fig. 3 shows a perspective view of the device according to the invention with pendulum support 15 for intake valve 19 and exhaust valve 20 of a cylinder, picked out from a series of cylinders or valves. The cylinder head-side joint 16 of the pendulum support 15 can be clearly seen, the axis of which coincides with the axis 9 of the rollers 10 of the output members 11, so that the bolt 6 is positively guided on an arc-shaped adjustment curve. In contrast to the embodiment according to FIG. 2, the bolt 6 here simultaneously takes on the function of the adjusting shaft. It carries the cams 18 which are supported on hardened sliders 21 mounted in the housing and is rotatable in the pendulum support. The bolt 6 is connected to the adjusting motor 23 fixed to the housing via a suitable connecting element. In the present example, an articulated shaft 22 serves as a connecting element. This embodiment offers considerable advantages with regard to the variety of parts, but also space in the area of the actual valve control. Since other connecting elements, such as Schmitt couplings, Oldham couplings, toothed and chain drives, are also possible in addition to cardan shafts, there is a certain flexibility for accommodating the adjusting motor 23.
Fig. 4 zeigt schematisch das Zusammenwirken von Fahrpedal 40, Versteilmotoren 23, Drehwinkelsensor 42 am Schwungrad und Drehwinkelsensor 43 an der Nockenwelle mit dem Motormanagement 44. Ein vom Fahrpedal 40 bzw. einem Sensor für dessen Stellung ausgehendes Signal wird vom Motormanagement 44 in ein Signal an die Versteilmotoren 23 zur Erhöhung oder Erniedrigung der Ventilhübe gewandelt. Nach Erreichen des gewünschten Lastzustandes für den Gesamtmotor wertet das Motormanagement 44 die Signale des hochauflösenden Drehwinkelsensors 42 am Schwungrad aus. Diese wer- den mit Hilfe des niedrig auflösenden Drehwinkelsensors 43 an der Nockenwelle oder an einer anderen, mit halber Kurbelwellendrehzahl laufenden Welle, den einzelnen Zylindern zugeordnet. Mit diesen Informationen gehen Signale an die einzelnen Versteilmotoren 23 zur Nivellierung der Drehmomentspitzen oder der Kurbelwellendrehzahl, in dem die Ventilhübe der Zylinder mit kleineren Drehmomenten nach oben korrigiert werden und diejenigen der Zylinder mit größeren Drehmomenten nach unten. Erfindungsgemäß findet eine Verstellung, ob mit oder ohne Ausgleich, während der gemeinsamen Ruhephasen der von einem Versteilmotor bedienten Ventile statt. Deren Phasenlage entnimmt das Motormanagement 44 dem Sensor 43 an der Nockenwelle nebenbei. 4 schematically shows the interaction of accelerator pedal 40, adjusting motors 23, angle of rotation sensor 42 on the flywheel and angle of rotation sensor 43 on the camshaft with engine management 44. A signal emanating from accelerator pedal 40 or a sensor for its position is converted into a signal by engine management 44 the adjusting motors 23 are converted to increase or decrease the valve strokes. After reaching the desired load condition for the entire engine, the engine management 44 evaluates the signals of the high-resolution rotation angle sensor 42 on the flywheel. These will assigned to the individual cylinders with the aid of the low-resolution angle of rotation sensor 43 on the camshaft or on another shaft running at half the crankshaft speed. With this information, signals are sent to the individual adjusting motors 23 for leveling the torque peaks or the crankshaft speed by correcting the valve strokes of the cylinders with smaller torques upwards and those of the cylinders with larger torques downwards. According to the invention, adjustment takes place, with or without compensation, during the common rest phases of the valves operated by an adjusting motor. The engine management 44 also takes their phase position from the sensor 43 on the camshaft.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Nockenwelle1 camshaft
2 Nocken2 cams
3 Rolle3 roll
4 Zwischenglied4 intermediate link
5 Steuerkurve5 control curve
Oα RastbereichOα rest area
5b Hubbereich5b stroke range
6 Bolzen6 bolts
7 Achse7 axis
8 Verstellkurve8 adjustment curve
9 Achse9 axis
10 Rolle10 roll
11 Abtriebsglied11 output link
12 Gelenk12 joint
13 Ventil13 valve
14 Pfeil14 arrow
14a Richtungspfeil14a directional arrow
15 Pendelstütze15 pendulum support
16 Gelenk16 joint
17 Verstellwelle17 adjustment shaft
18 Kurvenscheibe18 cam
18a Stößel18a plunger
19 Einlassventil19 inlet valve
20 Auslassventil20 exhaust valve
21 Gleitstück21 slider
22 Gelenkwelle22 PTO shaft
23 Verstellmotor23 adjusting motor
40 Fahrpedal Drehwinkelsensor Drehwinkelsensor Motormanagement 40 accelerator pedal Rotation angle sensor Rotation angle sensor engine management

Claims

Patentansprüche claims
1 . Vorrichtung zur variablen Betätigung von Gaswechselventilen für Verbrennungsmotoren, bei welcher sich ein oder mehrere Nocken (2) einer in einem Gehäuse gelagerten Nockenwelle (1 ), abhängig von der Motordrehzahl drehen, der Nocken (2) zunächst ein Zwischenglied (4) antreibt, welches eine oszillierende, reine Drehbewegung ausführt, dessen Drehachse (7) im Gehäuse parallel zu sich selbst entlang einer Verstellkurve (8) verschiebbar ist, das eine Steuerkurve (5) mit einem Rastbereich (5a) und einem Hubbereich (5b) aufweist, und über diese Steuerkurve ein Abtriebsglied (1 1 ) betätigt, das seinerseits mindestens ein Ventil betätigt dadurch gekennzeichnet, dass das Zwischenglied (4) auf einem Bolzen (6) mit einer Achse entsprechend der Drehachse (7) gelagert und der Bolzen (6) auf der Verstellkurve parallel verschiebbar angebracht ist, wobei die Parallelverschiebung mittels Kurvenscheiben (1 8) und Stößel (1 8a) bzw. Gleitstücke (21 ), die sich direkt oder indirekt gegen das Gehäuse abstützen, erfolgt.1 . Device for the variable actuation of gas exchange valves for internal combustion engines, in which one or more cams (2) of a camshaft (1) mounted in a housing rotate, depending on the engine speed, the cams (2) first driving an intermediate member (4), which one executes an oscillating, pure rotary movement, the axis of rotation (7) of which can be displaced in the housing parallel to itself along an adjustment curve (8), which has a control curve (5) with a latching region (5a) and a stroke region (5b), and via this control curve an output member (1 1) actuates, which in turn actuates at least one valve, characterized in that the intermediate member (4) is mounted on a pin (6) with an axis corresponding to the axis of rotation (7) and the pin (6) is displaceable in parallel on the adjustment curve is attached, the parallel displacement by means of cams (1 8) and tappets (1 8a) or sliders (21), which directly or indirectly against the G Support the housing.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Kurvenscheiben (1 8) auf einer Verstellwelle (1 7) drehbar am Gehäuse angebunden sind und die durch die Kurvenscheibe (1 8) erzeugte Verstellbewegung über einen Stößel (1 8a) auf den Bolzen (6) übertragen wird.2. Device according to claim 1, characterized in that the cams (1 8) on an adjusting shaft (1 7) are rotatably connected to the housing and the adjustment movement generated by the cam (1 8) via a plunger (1 8a) on the bolt (6) is transmitted.
3. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass der Bolzen (6) in seinen Führungen drehbeweglich gelagert ist und eine oder mehrere Kurvenscheiben (1 8) trägt, die sich mit ihren Kurven direkt oder indirekt am Gehäuse abstützen und der Bolzen über ein geeignetes Verbindungselement von einem Verstellmittel verdreht werden kann. 3. Device according to claim 1, characterized in that the bolt (6) is rotatably supported in its guides and carries one or more cams (1 8), which are supported with their curves directly or indirectly on the housing and the bolt via a suitable Connecting element can be rotated by an adjusting means.
4. Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Kurvenscheiben (1 8) den Bolzen (6) in bezüglich der Verstellkurve (8) im Wesentlichen in tangentialer Richtung abstützt.4. Device according to one or more of claims 1 to 3, characterized in that the cams (1 8) supports the bolt (6) in the tangential direction with respect to the adjustment curve (8) substantially.
5. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass im Gehäuse Gleitstücke (21 ) aus einem Material erhöhter Härte angeordnet sind, gegen die sich die Kurvenscheiben (1 8) abstützen.5. The device according to claim 3, characterized in that in the housing sliders (21) are arranged made of a material of increased hardness, against which the cams (1 8) are supported.
6. Vorrichtung nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, dass ein hydraulisches Spielausgleichselement am Abtriebsglied vorgesehen ist.6. Device according to claims 1 to 5, characterized in that a hydraulic lash adjuster is provided on the output member.
7. Vorrichtung nach den Ansprüchen 1 bis 6, gekennzeichnet durch ihre separate Anordnung für jedes Motorventil.7. Device according to claims 1 to 6, characterized by its separate arrangement for each engine valve.
8. Vorrichtung nach den Ansprüchen 1 bis 6, gekennzeichnet durch ihre separate Anordnung für alle Ein- oder Auslassventile eines Zylinderkopfes.8. Device according to claims 1 to 6, characterized by its separate arrangement for all intake or exhaust valves of a cylinder head.
9. Vorrichtung nach den Ansprüchen 1 bis 6, gekennzeichnet durch ihre separate Anordnung für alle Ventile eines Zylinderkopfes.9. Device according to claims 1 to 6, characterized by its separate arrangement for all valves of a cylinder head.
10. Vorrichtung nach den Ansprüchen 1 bis 6, gekennzeichnet durch ihre separate Anordnung jeweils für zwei benachbarte, parallele Ventile eines Zylinders. 10. Device according to claims 1 to 6, characterized by its separate arrangement for two adjacent, parallel valves of a cylinder.
1 1 . Vorrichtung nach Anspruch 10, gekennzeichnet durch die gemeinsame, zusammengefasste Betätigung der Ein- oder/und Auslassventile eines Zylinders.1 1. Apparatus according to claim 10, characterized by the common, combined actuation of the intake and / or exhaust valves of a cylinder.
1 2. Vorrichtung nach Anspruch 1 1 , gekennzeichnet durch ein gemeinsames Zwischenglied mit zwei gleichen Steuerkurven für die beiden Ventile.1 2. Device according to claim 1 1, characterized by a common intermediate member with two identical control cams for the two valves.
1 3. Vorrichtung nach Anspruch 1 1 , gekennzeichnet durch ein gemeinsames Zwischenglied mit zwei verschiedenen Steuerkurven für die beiden Ventile.1 3. Device according to claim 1 1, characterized by a common intermediate member with two different control cams for the two valves.
14. Vorrichtung nach Anspruch 1 0, gekennzeichnet durch zwei gleiche Nocken (2) und zwei Zwischenglieder (4) mit gleichen Steuerkurven für die beiden Ventile.14. The apparatus according to claim 1 0, characterized by two identical cams (2) and two intermediate members (4) with the same control curves for the two valves.
1 5. Vorrichtung nach Anspruch 1 0, gekennzeichnet durch zwei verschiedene Nocken (2) und zwei Zwischenglieder (4) mit unterschiedlichen Steuerkurven für die beiden Ventile.1 5. Device according to claim 1 0, characterized by two different cams (2) and two intermediate members (4) with different control cams for the two valves.
1 6. Vorrichtung nach Anspruch 10, gekennzeichnet durch zwei verschiedene Nocken (2) und zwei Zwischenglieder (4) mit gleichen Steuerkurven für die beiden Ventile.1 6. Device according to claim 10, characterized by two different cams (2) and two intermediate members (4) with the same control curves for the two valves.
1 7. Vorrichtung nach den Ansprüchen 1 bis 1 6, gekennzeichnet durch eine Verstellung bis zum ständigen Geschlossenhalten mindestens eines Ventils.1 7. Device according to claims 1 to 1 6, characterized by an adjustment up to the constant keeping closed at least one valve.
1 8. Vorrichtung nach den Ansprüchen 1 bis 1 7, gekennzeichnet durch eine Hydraulikeinheit, die dem Bolzen (6) direkt oder indirekt die jeweils verlangte Winkellage vorgibt. 1 8. Device according to claims 1 to 1 7, characterized by a hydraulic unit which directly or indirectly specifies the respective required angular position of the bolt (6).
1 9. Vorrichtung nach den Ansprüchen 1 bis 1 7, gekennzeichnet durch einen elektrischen Versteilmotor (23), welcher über ein Getriebe dem Bolzen (6) direkt oder indirekt die jeweils verlangte Winkellage vorgibt.1 9. Device according to claims 1 to 1 7, characterized by an electric adjusting motor (23) which directly or indirectly specifies the required angular position via a gear the bolt (6).
20. Vorrichtung nach verschiedenen der Ansprüche 1 bis 7 sowie 10 bis20. Device according to various of claims 1 to 7 and 10 to
1 9, gekennzeichnet durch eine Verstellstrategie derart, dass, abgeleitet vom Signal des Drehwinkelgebers (42) der Kurbelwelle bzw. dessen Auswertung, die Ventilhübe der einzelnen Zylinder laufend nachreguliert werden.1 9, characterized by an adjustment strategy in such a way that, derived from the signal from the angle encoder (42) of the crankshaft or its evaluation, the valve strokes of the individual cylinders are continuously readjusted.
21 . Vorrichtung nach verschiedenen der Ansprüche 1 bis 7 sowie 10 bis21. Device according to various of claims 1 to 7 and 10 to
20, gekennzeichnet durch eine Verstellstrategie derart, dass die Verstellbewegungen im Wesentlichen während der gemeinsamen Ruhephasen aller von einem Verstellmotor (23) gemeinsam bedienter Ventile stattfinden. 20, characterized by an adjustment strategy such that the adjustment movements essentially take place during the common rest phases of all valves operated jointly by an adjustment motor (23).
EP04721164A 2003-03-24 2004-03-17 Device for the variable actuation of the gas exchange valves of internal combustion engines Expired - Lifetime EP1608850B1 (en)

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DE10312961A DE10312961C5 (en) 2003-03-24 2003-03-24 Device for the variable actuation of gas exchange valves of internal combustion engines
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PCT/EP2004/002741 WO2004085803A1 (en) 2003-03-24 2004-03-17 Device for the variable actuation of the gas exchange valves of internal combustion engines

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ATE449902T1 (en) 2009-12-15
MXPA05009833A (en) 2005-12-05
JP2006521492A (en) 2006-09-21
DE10312961C5 (en) 2009-01-29
WO2004085803A1 (en) 2004-10-07
US7493878B2 (en) 2009-02-24
CN100472035C (en) 2009-03-25
EP1608850B1 (en) 2009-11-25
US20070051329A1 (en) 2007-03-08
BRPI0408638A (en) 2006-03-28
DE502004010416D1 (en) 2010-01-07
DE10312961B3 (en) 2004-05-13
KR101098170B1 (en) 2011-12-23
CA2519578A1 (en) 2004-10-07
KR20050105995A (en) 2005-11-08
ES2334791T3 (en) 2010-03-16
CN1764770A (en) 2006-04-26

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