EP2578819A1 - Actuator unit for push cam systems with actuator pins controlled by control needles - Google Patents

Actuator unit for push cam systems with actuator pins controlled by control needles Download PDF

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Publication number
EP2578819A1
EP2578819A1 EP12181618.5A EP12181618A EP2578819A1 EP 2578819 A1 EP2578819 A1 EP 2578819A1 EP 12181618 A EP12181618 A EP 12181618A EP 2578819 A1 EP2578819 A1 EP 2578819A1
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EP
European Patent Office
Prior art keywords
combustion engine
internal combustion
control
spring
reciprocating internal
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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
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EP12181618.5A
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German (de)
French (fr)
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EP2578819B1 (en
Inventor
Ronny GÜNNEL
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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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
    • 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
    • F01L13/0036—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction

Definitions

  • Such actuator for reciprocating internal combustion engines is from the WO 2010/097298 A1 known.
  • the permanent magnets operatively connected to the solenoid unit are secured to the inner ends of the control needles.
  • spring which load the control pins together with permanent magnets in the direction of clamping body and clamp them to set the Aktorstatte in its inner position
  • the solenoid unit attracts the permanent magnets and thus the control needles against the force of the springs and thus the terminal body Est has shown that the Aktorstatte when inserted by the ejection ramp are not quickly locked or, for example, caused by vibrations of Hubkolbenbrennkraftmaschine, solve in the locking device and contact the sliding grooves or lying next to the sliding grooves peripheral area unwanted.
  • the unwanted loosening of the lock can also occur when the actuator pin passes over edges on the high circle of the displacement cam unit. If the actuator pin slides in the direction of the cam contour of the sliding cam unit, it is reset when the ejection ramp is passed over, ie the sunken actuator pin is pushed back to the level of the high-revving cam unit. In this case, the control needle immediately after pushing up the Aktorstattes again ensure the locking of the locking device, which is only the case when caused by the spring force of the control needle acceleration is high enough to cause the lock fast enough, but not always the case.
  • the spring on the actuator pin In order to be able to extend the actuator pin sufficiently fast, even at low temperatures and low viscosity of the engine oil, the spring on the actuator pin must be made sufficiently strong. As a result, the acceleration caused by the spring on the actuator pins, especially in the case of a warm reciprocating internal combustion engine, is high, so that a false lock is enhanced by the control needles.
  • the object of the invention is therefore to improve an actuator for reciprocating internal combustion engines so that the disadvantages described above are avoided. It should be ensured that the control needles react quickly enough even in the border areas and track the lock fast enough to clamp the Aktorstatte. This should be done with simple and inexpensive means.
  • the object of the invention is achieved in that the defined by spring force per moving mass acceleration of the control needles are matched by their feathers of the acceleration of the actuator pins by the spring force associated therewith substantially.
  • the reduction of the mass takes place by decoupling the permanent magnet from the control needle.
  • the mass of the control needle unit to be moved by the spring is now considerably lower, so that the acceleration considerably can be increased.
  • the spring now only needs the actual control needle without the mass of the permanent magnet in the direction of locking device to accelerate, so that a considerably faster locking takes place, which is all operating conditions.
  • a spring plate is fixed, which forms a stop for the permanent magnet, so that this, moved by the solenoid unit, the control pin can release from the lock.
  • the spring plate continues to serve as a support for the respective spring of the control needle, which is supported on a component adjacent to the electromagnet unit.
  • the spring plate may be caulked with the end of the shaft of the control pin. But it is also possible that the spring plate has a shaft in which an inwardly projecting groove is incorporated, which corresponds to a groove on the shaft of the control needle, so that the spring plate can be advanced with the flange on the end of the shaft and there engages in the groove.
  • a steel disc with radial and axial play can be arranged, which is installed between the permanent magnet and a shoulder at the end of the shaft of the control needle.
  • 1 denotes a control needle, which has a cylindrical bearing portion 2, a control tip 3 and a shaft 4.
  • the shaft 4 has a reduced diameter, which adjoins the storage area 2 by means of a shoulder 5.
  • a designated 6 spring plate is attached, which has a flange 7 which is engaged by means of a groove in a groove of the shaft 4 of the control needle 1 and thereby fixed.
  • a permanent magnet 8 and a steel plate 9 is arranged on the shaft 4, which only partially fill the axial space of the shaft between disc spring 6 and paragraph 5 and continue to be arranged with radial play on the shaft 4, so that a complete decoupling of the formed as a disc permanent magnet 8 and the steel plate 9 against the control needle 1 is present.
  • the control needle 1 with the spring plate 6, the permanent magnet 8 and the steel plate 9 are, as in FIG. 3 shown, part of an actuator designated 10.
  • the actuator unit 10 has a sleeve 11 in which actuator pins 12 are displaceably guided with the interposition of sliding sleeves 13.
  • the sliding sleeves 13 have conical extensions 14 at their inner ends on, which are in operative connection with trained as balls clamping bodies 15.
  • the clamping body 15 are installed in openings of the actuator pins 12 and are dominated by the control tips 3 of the control needles 1.
  • the actuator pins 12 are loaded by compression springs 16 in the extension direction, wherein the compression springs 16 are supported on guide elements 17, which are fixed to the sleeve 11.
  • the guide elements 17 have bearings in which the storage area 2 of the control needles 1 radially fixed, but is guided axially movable.
  • the spring plate 6 of the control needles 1 is connected to a spring 18 in operative connection, which is designed as a compression spring and further supported on a component 19, to which, not shown, the electromagnet unit connects, so that the component 19 is preferably not carried out magnetically.
  • the solenoid unit To release the clamping body 15 and thus unlocking the actuator pins 12, the solenoid unit, not shown, is energized so that it attracts the permanent magnets 8 and the steel discs 9 and thus raises the control needles 1 with spring plate 6 against the force of the spring 18.
  • the decoupling of the permanent magnets 8 and the steel discs 9 according to the invention also unlocking the control needles 1 has become faster, since the solenoid initially only the permanent magnets 8 and the steel discs 9 must move, then, accelerated, faster and safer move the control needles 1 and the springs 18 can compress.

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

Abstract

The combustion engine has a pneumatic stapler that is spring-loaded in direction of a sliding cam unit. A sliding cam positioning unit is secured at a remote retracted position by using a locking unit. Several clamping elements are operatively connected to spring-loaded control needles (1) by using a solenoid assembly. Several permanent magnets are detachably attached with respect to control needless. The amount of acceleration of pneumatic stapler is equal to that of spring force per unit acceleration of needles associated with the springs.

Description

Hubkolbenbrennkraftmaschine mit zumindest einem Zylinderkopf, dessen Ein- und Auslasskanäle von zumindest je einem als Ein- und Auslassventil ausgebildeten Gaswechselventil beherrscht sind, die durch Nocken zumindest einer Nockenwelle und von diesen angetriebenen Übertragungselementen betätigbar sind, wobei die Nocken als Schiebenocken mit zumindest einem Nocken pro Schiebenockeneinheit ausgebildet sind, die drehfest aber axial verschiebbar auf einer brennkraftmaschinenfest geführten, angetriebenen Grundwelle angeordnet sind, und mit zumindest einer brennkraftmaschinenfesten Aktoreinheit pro Schiebenockeneinheit mit zumindest einem Aktorstift zur Verschiebung der Schiebenockeneinheiten in unterschiedliche axiale Positionen mittels zumindest zwei mit den Aktorstiften zusammenwirkenden Verschiebenuten am Umfang der Schiebenockeneinheiten, die schraubenförmig ausgebildet, spiegelsymmetrisch zueinander angeordnet und zumindest eine Auswurframpe für die Aktorstifte aufweisen, wobei die Aktorstifte in Richtung zur Schiebenockeneinheit federbelastet sind und in ihren eingefahrenen, der Schiebenockeneinheit abgewandten Position mittels arretierbarer Rasteinrichtungen festlegbar sind und wobei die Arretierungen mit Klemmkörpern der Rasteinrichtungen korrespondierende, federbelastete Steuernadeln aufweisen, die mittels einer Elektromagneteinheit und mit den Steuernadeln in Wirkverbindung stehenden Dauermagneten lösbar sind.Reciprocating internal combustion engine with at least one cylinder head whose inlet and outlet ports are dominated by at least one designed as inlet and outlet valve gas exchange valve, which are actuated by cams at least one camshaft and driven by these transmission elements, wherein the cams as sliding cam with at least one cam per sliding cam unit are formed, the non-rotatably but axially displaceable on an internal combustion engine fixed guided driven shaft are arranged, and with at least one engine-fixed actuator per sliding cam unit with at least one Aktorstift for shifting the sliding cam units in different axial positions by means of at least two cooperating with the Aktorstiften sliding grooves on the circumference of the sliding cam units , which are helically formed, mirror-symmetrically arranged to each other and at least one ejection ramp for the Aktorstifte, wherein the di e Aktorstifte are spring-loaded in the direction of the sliding cam unit and in their retracted, the sliding cam unit remote position by means of lockable locking devices are fixed and wherein the detents with clamping bodies of the locking devices corresponding, spring-loaded control needles, which are releasably connected by means of a solenoid unit and the control needles in operative connection permanent magnet ,

Hintergrund der ErfindungBackground of the invention

Eine derartige Aktoreinheit für Hubkolbenbrennkraftmaschinen ist aus der WO 2010/097298 A1 bekannt. Die mit der Elektromagneteinheit in Wirkverbindung stehenden Dauermagnete sind an den inneren Enden der Steuernadeln befestigt. An den Steuernadeln greifen Feder an, die die Steuernadeln samt Dauermagnete in Richtung Klemmkörper belasten und diese zum Festlegen der Aktorstifte in ihrer inneren Stellung klemmen, wogegen die Elektromagneteinheit die Dauermagnete und damit die Steuernadeln gegen die Kraft der Federn anzieht und damit die Klemmkörper Est hat sich gezeigt, dass die Aktorstifte beim Einschieben durch die Auswurframpe nicht schnell verrastet werden oder, z.B. hervorgerufen durch Vibrationen der Hubkolbenbrennkraftmaschine, sich in der Rasteinrichtung lösen und die Verschiebenuten bzw. den neben den Verschiebenuten liegenden Umfangsbereich ungewollte kontaktieren. Das ungewollte Lösen der Arretierung kann auch dann auftreten, wenn der Aktorstift Kanten am Hochkreis der Verschiebenockeneinheit überfährt. Rutscht der Aktorstift in Richtung der Nockenkontur der Schiebenockeneinheit ab, so wird er beim Überfahren der Auswurframpe wieder zurückgestellt, d.h. der abgesunkene Aktorstift wird wieder auf das Niveau des Hochkreises der Schiebenockeneinheit zurückgeschoben. In diesem Fall soll die Steuernadel sofort nach dem Hochschieben des Aktorstiftes erneut die Arretierung der Rasteinrichtung sicherstellen, was nur dann der Fall ist, wenn die durch die Federkraft der Steuernadel hervorgerufene Beschleunigung hoch genug ist, um die Arretierung schnell genug zu bewirken, was aber nicht immer der Fall ist.Such actuator for reciprocating internal combustion engines is from the WO 2010/097298 A1 known. The permanent magnets operatively connected to the solenoid unit are secured to the inner ends of the control needles. At the control pins engage spring, which load the control pins together with permanent magnets in the direction of clamping body and clamp them to set the Aktorstifte in its inner position, whereas the solenoid unit attracts the permanent magnets and thus the control needles against the force of the springs and thus the terminal body Est has shown that the Aktorstifte when inserted by the ejection ramp are not quickly locked or, for example, caused by vibrations of Hubkolbenbrennkraftmaschine, solve in the locking device and contact the sliding grooves or lying next to the sliding grooves peripheral area unwanted. The unwanted loosening of the lock can also occur when the actuator pin passes over edges on the high circle of the displacement cam unit. If the actuator pin slides in the direction of the cam contour of the sliding cam unit, it is reset when the ejection ramp is passed over, ie the sunken actuator pin is pushed back to the level of the high-revving cam unit. In this case, the control needle immediately after pushing up the Aktorstiftes again ensure the locking of the locking device, which is only the case when caused by the spring force of the control needle acceleration is high enough to cause the lock fast enough, but not always the case.

Um den Aktorstift auch bei tiefen Temperaturen und niedriger Viskosität des Motoröls hinreichend schnell ausfahren zu können, muss die Feder am Aktorstift hinreichend stark ausgeführt sein. Dies führt dazu, dass die durch die Feder am Aktorstifte hervorgerufene Beschleunigung, insbesondere bei warmer Hubkolbenbrennkraftmaschine, hoch ist, so dass eine Fehlarretierung durch die Steuernadeln verstärkt wird.In order to be able to extend the actuator pin sufficiently fast, even at low temperatures and low viscosity of the engine oil, the spring on the actuator pin must be made sufficiently strong. As a result, the acceleration caused by the spring on the actuator pins, especially in the case of a warm reciprocating internal combustion engine, is high, so that a false lock is enhanced by the control needles.

Aufgabe der ErfindungObject of the invention

Aufgabe der Erfindung ist es daher, eine Aktoreinheit für Hubkolbenbrennkraftmaschinen so zu verbessern, dass die zuvor beschriebenen Nachteile vermieden werden. Es soll sichergestellt sein, dass die Steuernadeln auch in den Grenzbereichen immer schnell genug reagieren und die Arretierung schnell genug nachführen, um die Aktorstifte zu klemmen. Dies soll mit einfachen und kostengünstigen Mitteln erfolgen.The object of the invention is therefore to improve an actuator for reciprocating internal combustion engines so that the disadvantages described above are avoided. It should be ensured that the control needles react quickly enough even in the border areas and track the lock fast enough to clamp the Aktorstifte. This should be done with simple and inexpensive means.

Zusammenfassung der ErfindungSummary of the invention

Die Aufgabe der Erfindung wird dadurch gelöst, dass die durch Federkraft pro bewegter Masse definierte Beschleunigung der Steuernadeln durch ihre Federn der Beschleunigung der Aktorstifte durch die diesen zugeordnete Federkraft im Wesentlichen angeglichen sind.The object of the invention is achieved in that the defined by spring force per moving mass acceleration of the control needles are matched by their feathers of the acceleration of the actuator pins by the spring force associated therewith substantially.

Dadurch wird sichergestellt, dass die Steuernadeln so schnell reagieren können, wie auch die Aktorstifte durch ihre Federn beschleunigt werden, so dass auch bei den zum Stand der Technik beschriebenen Problemen immer hinreichend schnell eine Arretierung der Rasteinrichtungen der Aktorstifte erfolgt. Dies könnte einmal dadurch erfolgen, dass die Federkraft der den Steuernadeln zugeordneten Federn erheblich erhöht wird. Dies ist jedoch nicht ohne Weiteres möglich, da die Spule der Elektromagneteinheit beim Entriegeln immer gegen die Kraft der Federn der Steuernadeln arbeiten muss und somit eine größere Spule mit erhöhter Leistungsaufnahme und Abschaltenergie verwendet werden müsste. Dies führt jedoch zu unerwünscht großen Spulen.This ensures that the control needles can react as quickly as the actuator pins are accelerated by their springs, so that even with the problems described in the prior art always sufficiently fast locking of the locking devices of Aktorstifte takes place. This could be done once by the spring force of the springs associated with the control pins is significantly increased. However, this is not readily possible because the coil of the solenoid unit when unlocking must always work against the force of the springs of the control needles and thus a larger coil with increased power and cut-off energy would have to be used. However, this leads to undesirably large coils.

In weiterer Ausgestaltung der Erfindung wird daher vorgeschlagen, dass die bewegte Masse der Steuernadeln zwecks Angleichung der Beschleunigung entsprechend verringert wird.In a further embodiment of the invention it is therefore proposed that the moving mass of the control needles for the purpose of equalizing the acceleration is reduced accordingly.

Deshalb wird in weiterer Ausgestaltung der Erfindung vorgeschlagen, dass die Verringerung der Masse durch Entkoppeln des Dauermagneten von der Steuernadel erfolgt. Dadurch wird nun die Masse der durch die Feder zu bewegenden Steuernadeleinheit erheblich geringer, so dass die Beschleunigung erheblich erhöht werden kann. Die Feder braucht nun nur noch die eigentliche Steuernadel ohne die Masse des Dauermagneten in Richtung Rasteinrichtung zu beschleunigen, so dass eine erheblich schnellere Arretierung erfolgt, die allen Betriebsbedingungen gerecht wird.Therefore, it is proposed in a further embodiment of the invention that the reduction of the mass takes place by decoupling the permanent magnet from the control needle. As a result, the mass of the control needle unit to be moved by the spring is now considerably lower, so that the acceleration considerably can be increased. The spring now only needs the actual control needle without the mass of the permanent magnet in the direction of locking device to accelerate, so that a considerably faster locking takes place, which is all operating conditions.

In vorteilhafter Weise weisen die Steuernadeln an ihren dem Dauermagneten zugewandten Endbereichen einen Schaft auf, auf dem der Dauermagnet mit radialem und axialem Spiel angeordnet ist.Advantageously, the control needles on their end faces facing the permanent magnet on a shaft on which the permanent magnet is arranged with radial and axial play.

Am Ende des Schaftes ist ein Federteller befestigt, der einen Anschlag für den Dauermagneten bildet, so dass dieser, bewegt durch die Elektromagneteinheit, die Steuernadel aus der Arretierung lösen kann. Der Federteller dient weiterhin als Stütze für die jeweilige Feder der Steuernadel, die sich an einem der Elektromagneteinheit benachbarten Bauteil abstützt.At the end of the shaft, a spring plate is fixed, which forms a stop for the permanent magnet, so that this, moved by the solenoid unit, the control pin can release from the lock. The spring plate continues to serve as a support for the respective spring of the control needle, which is supported on a component adjacent to the electromagnet unit.

Der Federteller kann mit dem Ende des Schaftes der Steuernadel verstemmt sein. Es ist aber auch möglich, dass der Federteller einen Schaft aufweist, in dem eine nach innen vorstehende Rille eingearbeitet ist, die mit einer Nut am Schaft der Steuernadel korrespondiert, so dass der Federteller mit dem Flansch über das Ende des Schaftes vorgeschoben werden kann und dort in der Nut einrastet.The spring plate may be caulked with the end of the shaft of the control pin. But it is also possible that the spring plate has a shaft in which an inwardly projecting groove is incorporated, which corresponds to a groove on the shaft of the control needle, so that the spring plate can be advanced with the flange on the end of the shaft and there engages in the groove.

Zur Verbesserung des Magnetflusses kann zusätzlich zu dem Steuermagneten auf dem Schaft der Steuernadel eine Stahlscheibe mit radialem und axialem Spiel angeordnet sein, die zwischen dem Dauermagneten und einem Absatz am Ende des Schaftes der Steuernadel eingebaut ist.To improve the magnetic flux, in addition to the control magnet on the shaft of the control needle, a steel disc with radial and axial play can be arranged, which is installed between the permanent magnet and a shoulder at the end of the shaft of the control needle.

Es sei ausdrücklich darauf hingewiesen, dass das Prinzip der Entkopplung einer Masse bei bewegten Schaltelementen auch auf andere Schaltventile übertragen werden kann, bei denen durch die gezielte Gesamtmassenänderung eine Erhöhung der Reaktionsfähigkeit erreicht werden kann, beispielsweise bei schnell schaltenden Magnetventilen zur Steuerung von Gaswechselventilen.It should be expressly understood that the principle of decoupling a mass in moving switching elements can be transferred to other switching valves in which by the targeted total mass change, an increase in responsiveness can be achieved, for example, in fast-switching solenoid valves for controlling gas exchange valves.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Zur weiteren Erläuterung der Erfindung wird auf die Zeichnungen verwiesen, in denen ein Ausführungsbeispiel der Erfindung vereinfacht dargestellt ist.For further explanation of the invention reference is made to the drawings, in which an embodiment of the invention is shown in simplified form.

Es zeigen:

Figur 1:
eine Ansicht einer Steuernadel mit auf ihrem Schaft befestigtem Federteller,
Figur 2:
eine Steuernadel gemäß Figur 1, bei der auf dem Schaft ein Dauermagnet und eine Stahlscheibe angeordnet sind, und
Figur 3:
einen Schnitt durch eine Aktoreinheit mit zwei Aktorstiften und zwei zugeordneten Steuernadeln.
Show it:
FIG. 1:
a view of a control needle with fixed on its shaft spring plate,
FIG. 2:
a control needle according to FIG. 1 in which a permanent magnet and a steel disc are arranged on the shaft, and
FIG. 3:
a section through an actuator unit with two Aktorstiften and two associated control needles.

Detaillierte Beschreibung der ZeichnungenDetailed description of the drawings

In den Figuren 1 bis 3 ist, soweit im Einzelnen dargestellt, mit 1 eine Steuernadel bezeichnet, die einen zylindrischen Lagerbereich 2, eine Steuerspitze 3 und einen Schaft 4 aufweist. Der Schaft 4 hat einen reduzierten Durchmesser, der sich mittels eines Absatzes 5 an den Lagerbereich 2 anschließt. Am freien Ende des Schaftes 4 ist ein mit 6 bezeichneter Federteller befestigt, der einen Flansch 7 aufweist, der mittels einer Rille in einer Nut des Schaftes 4 der Steuernadel 1 eingerastet und dadurch fixiert ist.In the FIGS. 1 to 3 is, as far as shown in detail, 1 denotes a control needle, which has a cylindrical bearing portion 2, a control tip 3 and a shaft 4. The shaft 4 has a reduced diameter, which adjoins the storage area 2 by means of a shoulder 5. At the free end of the shaft 4, a designated 6 spring plate is attached, which has a flange 7 which is engaged by means of a groove in a groove of the shaft 4 of the control needle 1 and thereby fixed.

Wie Figur 2 zu entnehmen ist, ist auf dem Schaft 4 ein Dauermagnet 8 und eine Stahlscheibe 9 angeordnet, die den axialen Raum des Schaftes zwischen Tellerfeder 6 und Absatz 5 nur teilweise ausfüllen und weiterhin mit radialem Spiel auf dem Schaft 4 angeordnet sind, so dass eine vollständige Entkopplung des als Scheibe ausgebildeten Dauermagneten 8 und der Stahlscheibe 9 gegenüber der Steuernadel 1 vorliegt.As FIG. 2 can be seen, a permanent magnet 8 and a steel plate 9 is arranged on the shaft 4, which only partially fill the axial space of the shaft between disc spring 6 and paragraph 5 and continue to be arranged with radial play on the shaft 4, so that a complete decoupling of the formed as a disc permanent magnet 8 and the steel plate 9 against the control needle 1 is present.

Die Steuernadel 1 mit dem Federteller 6, dem Dauermagneten 8 und der Stahlscheibe 9 sind, wie in Figur 3 dargestellt, Bestandteil einer mit 10 bezeichneten Aktoreinheit. Die Aktoreinheit 10 weist eine Hülse 11 auf, in der Aktorstifte 12 unter Zwischenschaltung von Gleithülsen 13 verschiebbar geführt sind. Die Gleithülsen 13 weisen an ihren inneren Enden kegelförmige Erweiterungen 14 auf, die mit als Kugeln ausgebildeten Klemmkörpern 15 in Wirkverbindung stehen. Die Klemmkörper 15 sind in Öffnungen der Aktorstifte 12 eingebaut und werden durch die Steuerspitzen 3 der Steuernadeln 1 beherrscht. Die Aktorstifte 12 sind durch Druckfedern 16 in Ausfahrrichtung belastet, wobei sich die Druckfedern 16 an Führungselementen 17 abstützen, die an der Hülse 11 fixiert sind. Die Führungselemente 17 weisen Lager auf, in denen der Lagerbereich 2 der Steuernadeln 1 radial festgelegt, aber axial beweglich geführt ist. Der Federteller 6 der Steuernadeln 1 steht mit einer Feder 18 in Wirkverbindung, die als Druckfeder ausgebildet ist und sich weiterhin an einem Bauteil 19 abstützt, an den sich, nicht dargestellt, die Elektromagneteinheit anschließt, so dass das Bauteil 19 vorzugweise nicht magnetisch ausgeführt ist.The control needle 1 with the spring plate 6, the permanent magnet 8 and the steel plate 9 are, as in FIG. 3 shown, part of an actuator designated 10. The actuator unit 10 has a sleeve 11 in which actuator pins 12 are displaceably guided with the interposition of sliding sleeves 13. The sliding sleeves 13 have conical extensions 14 at their inner ends on, which are in operative connection with trained as balls clamping bodies 15. The clamping body 15 are installed in openings of the actuator pins 12 and are dominated by the control tips 3 of the control needles 1. The actuator pins 12 are loaded by compression springs 16 in the extension direction, wherein the compression springs 16 are supported on guide elements 17, which are fixed to the sleeve 11. The guide elements 17 have bearings in which the storage area 2 of the control needles 1 radially fixed, but is guided axially movable. The spring plate 6 of the control needles 1 is connected to a spring 18 in operative connection, which is designed as a compression spring and further supported on a component 19, to which, not shown, the electromagnet unit connects, so that the component 19 is preferably not carried out magnetically.

Zum Lösen der Klemmkörper 15 und damit Entriegeln der Aktorstifte 12 wird die nicht dargestellte Elektromagneteinheit bestromt, so dass diese die Dauermagnete 8 und die Stahlscheiben 9 anzieht und damit die Steuernadeln 1 mit Federteller 6 gegen die Kraft der Feder 18 anhebt. Durch das erfindungsgemäße Entkoppeln der Dauermagnete 8 und der Stahlscheiben 9 ist auch das Entriegeln der Steuernadeln 1 schneller geworden, da die Elektromagneteinheit zunächst nur die Dauermagnete 8 und die Stahlscheiben 9 bewegen muss, die dann, bereits beschleunigt, schneller und sicherer die Steuernadeln 1 verschieben und die Federn 18 zusammendrücken können. Haben sich die Aktorstifte 12, z.B. hervorgerufen durch Vibrationen der Hubkolbenbrennkraftmaschine, aus ihrer inneren Lage nach außen verschoben und werden z.B. durch eine Auswurframpe der Verschiebenut einen kurzen oder einen längeren Weg im Normalbetrieb zurückgeschoben, sind die Steuernadeln 1 belastet durch die Federn 18 jederzeit in der Lage kurzfristig eine Arretierung der Klemmkörper 15 vorzunehmen, da die Federn 18 nur den Federteller 6 und die Steuernadel 1 beschleunigen müssen.To release the clamping body 15 and thus unlocking the actuator pins 12, the solenoid unit, not shown, is energized so that it attracts the permanent magnets 8 and the steel discs 9 and thus raises the control needles 1 with spring plate 6 against the force of the spring 18. The decoupling of the permanent magnets 8 and the steel discs 9 according to the invention also unlocking the control needles 1 has become faster, since the solenoid initially only the permanent magnets 8 and the steel discs 9 must move, then, accelerated, faster and safer move the control needles 1 and the springs 18 can compress. Have the Aktorstifte 12, for example, caused by vibrations of Hubkolbenbrennkraftmaschine, moved from its inner position outwards and are pushed back eg by an ejection ramp the Verschiebenut a short or a longer way in normal operation, the control needles 1 loaded by the springs 18 at any time in the Able to make a short-term locking of the clamping body 15, since the springs 18 only have to accelerate the spring plate 6 and the control needle 1.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Steuernadelcontrol needle
22
Lagerbereichstorage area
33
Steuerspitzetax tip
44
Schaftshaft
55
Absatzparagraph
66
Federtellerspring plate
77
Flanschflange
88th
Dauermagnetpermanent magnet
99
Stahlscheibesteel disc
1010
Aktoreinheitactuator
1111
Hülseshell
1212
AktorstifteAktorstifte
1313
Gleithülsensliding sleeves
1414
kegelförmige Erweiterungenconical extensions
1515
Klemmkörperclamping bodies
1616
Druckfederncompression springs
1717
Führungselementeguide elements
1818
Federnfeathers
1919
Bauteilecomponents

Claims (9)

Hubkolbenbrennkraftmaschine mit zumindest einem Zylinderkopf, dessen Ein- und Auslasskanäle von zumindest je einem als Ein- und Auslassventil ausgebildeten Gaswechselventil beherrscht sind, die durch Nocken zumindest einer Nockenwelle und von diesen angetriebenen Übertragungselementen betätigbar sind, wobei die Nocken als Schiebenocken mit zumindest einem Nocken pro Schiebenockeneinheit ausgebildet sind, die drehfest aber axial verschiebbar auf einer brennkraftmaschinenfest geführten, angetriebenen Grundwelle angeordnet sind, und mit zumindest einer brennkraftmaschinenfesten Aktoreinheit (10) pro Schiebenockeneinheit mit zumindest einem Aktorstift (12) zur Verschiebung der Schiebenockeneinheiten in unterschiedliche axiale Positionen mittels zumindest zwei mit den Aktorstiften (12) zusammenwirkenden Verschiebenuten am Umfang der Schiebenockeneinheiten, die schraubenförmig ausgebildet, spiegelsymmetrisch zueinander angeordnet und zumindest eine Auswurframpe für die Aktorstifte (12) aufweisen, wobei die Aktorstifte (12) in Richtung zur Schiebenockeneinheit federbelastet sind und in ihren eingefahrenen, der Schiebenockeneinheit abgewandten Position mittels arretierbarer Rasteinrichtungen festlegbar sind und wobei die Arretierungen mit Klemmkörpern (15) der Rasteinrichtungen korrespondierende, federbelastete Steuernadeln (1) aufweisen, die mittels einer Elektromagneteinheit und mit den Steuernadeln (1) in Wirkverbindung stehenden Dauermagneten (8) lösbar sind, dadurch gekennzeichnet, dass die durch Federkraft pro bewegter Masse definierte Beschleunigung der Steuernadeln (1) durch ihre Federn (18) der Beschleunigung der Aktorstifte (12) durch die ihnen zugeordneten Druckfedern (16) im Wesentlichen angeglichen sind.Reciprocating internal combustion engine with at least one cylinder head, whose inlet and outlet channels are dominated by at least one designed as inlet and outlet valve gas exchange valve, which are actuated by cams at least one camshaft and driven by these transmission elements, wherein the cams as sliding cam with at least one cam per sliding cam unit are formed, the non-rotatably but axially displaceable on an internal combustion engine fixed driven main shaft are arranged, and with at least one internal combustion engine actuator (10) per sliding cam unit with at least one Aktorstift (12) for shifting the sliding cam units in different axial positions by means of at least two with the Aktorstiften (12) cooperating sliding grooves on the circumference of the sliding cam units, which are helically formed, arranged mirror-symmetrically to each other and at least one ejection ramp for the Aktorstifte (12) have, wherein the Aktorstifte (12) are spring-loaded in the direction of the sliding cam unit and in their retracted, the sliding cam unit remote position by means of lockable locking devices are fixed and wherein the detents with clamping bodies (15) of the locking devices corresponding, spring-loaded control needles (1) by means of a solenoid unit and with the control needles (1) operatively connected permanent magnet (8) are detachable, characterized in that the spring force per moving mass defined acceleration of the control pins (1) by their springs (18) of the acceleration of the actuator pins (12) their associated compression springs (16) are substantially aligned. Hubkolbenbrennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die bewegte Masse der Steuernadeleinheit zwecks Angleichung der Beschleunigung entsprechend verringert ist.Reciprocating internal combustion engine according to claim 1, characterized in that the moving mass of the control needle unit for the purpose of equalizing the acceleration is reduced accordingly. Hubkolbenbrennkraftmaschine nach Anspruch 2, dadurch gekennzeichnet, dass die Verringerung der Masse durch Entkopplung des Dauermagneten (8) von der Steuernadel (1) erfolgt.Reciprocating internal combustion engine according to claim 2, characterized in that the reduction of the mass by decoupling of the permanent magnet (8) from the control needle (1). Hubkolbenbrennkraftmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Steuernadel (1) an ihrem dem Dauermagneten (8) zugewandten Endbereich einen Schaft (4) aufweist, auf dem der Dauermagnet (8) mit radialem Spiel angeordnet ist.Reciprocating internal combustion engine according to one of claims 1 to 3, characterized in that the control needle (1) at its the permanent magnet (8) end portion facing a shaft (4) on which the permanent magnet (8) is arranged with radial play. Hubkolbenbrennkraftmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass am Ende des Schaftes (4) ein Federteller (6) befestigt ist, der mit der Feder (18) der Steuernadel (1) in Verbindung steht.Reciprocating internal combustion engine according to one of the preceding claims, characterized in that at the end of the shaft (4) a spring plate (6) is fixed, which communicates with the spring (18) of the control needle (1). Hubkolbenbrennkraftmaschine nach Anspruch 5, dadurch gekennzeichnet, dass der Federteller (6) mit dem Ende des Schaftes (4) verstemmt ist.Reciprocating internal combustion engine according to claim 5, characterized in that the spring plate (6) with the end of the shank (4) is caulked. Hubkolbenbrennkraftmaschine nach Anspruch 5, dadurch gekennzeichnet, dass in dem Federteller (6) eine Rille eingearbeitet ist, die eine Nut am Schaft (4) der Steuernadel (1) kontaktiert.Reciprocating internal combustion engine according to claim 5, characterized in that in the spring plate (6) has a groove is incorporated, which contacts a groove on the shaft (4) of the control needle (1). Hubkolbenbrennkraftmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Dauermagnet (8) ein axiales Spiel zwischen dem Federteller (6) und einem Absatz (5) der Steuernadel (1) aufweist.Reciprocating internal combustion engine according to one of the preceding claims, characterized in that the permanent magnet (8) has an axial clearance between the spring plate (6) and a shoulder (5) of the control needle (1). Hubkolbenbrennkraftmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zusätzlich zum Dauermagneten (8) auf dem Schaft (4) der Steuernadel (1) eine Stahlscheibe (9) mit radialem und axialem Spiel angeordnet ist.Reciprocating internal combustion engine according to one of the preceding claims, characterized in that in addition to the permanent magnet (8) on the shank (4) of the control needle (1) a steel disc (9) is arranged with radial and axial play.
EP12181618.5A 2011-10-05 2012-08-24 Actuator unit for push cam systems with actuator pins controlled by control needles Not-in-force EP2578819B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201110084039 DE102011084039A1 (en) 2011-10-05 2011-10-05 Actuator unit for sliding cam systems with actuator pins controlled by control needles

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EP2578819A1 true EP2578819A1 (en) 2013-04-10
EP2578819B1 EP2578819B1 (en) 2013-11-20

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DE102011086233B4 (en) * 2011-11-14 2015-11-26 Schaeffler Technologies AG & Co. KG Actuator device for adjusting a sliding cam system with switching disc
DE102013201308A1 (en) * 2013-01-28 2014-07-31 Schaeffler Technologies Gmbh & Co. Kg Actuator for sliding cam system of engine, has control pin that is actuated by electromagnet unit, so that pin is guided in pressure plate axially displaceably and form-locking counter to force direction of springs in their movement
DE102013202130A1 (en) * 2013-02-08 2014-08-14 Schaeffler Technologies Gmbh & Co. Kg Sliding cam actuator for sliding cam system of internal combustion engine, has armature that is arranged to winding, such that running pin is extended from housing at occurrence of magnetic force and is immersed in slide groove of cam
US9583249B2 (en) * 2014-10-31 2017-02-28 Husco Automotive Holdings Llc Methods and systems for push pin actuator
DE102017114575A1 (en) * 2017-06-29 2019-01-03 Man Truck & Bus Ag Variable valve train

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US8851035B2 (en) 2014-10-07
EP2578819B1 (en) 2013-11-20
DE102011084039A1 (en) 2013-04-11
US20130087113A1 (en) 2013-04-11

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