EP1063391A2 - Valve drive for an internal combustion engine - Google Patents

Valve drive for an internal combustion engine Download PDF

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Publication number
EP1063391A2
EP1063391A2 EP00112962A EP00112962A EP1063391A2 EP 1063391 A2 EP1063391 A2 EP 1063391A2 EP 00112962 A EP00112962 A EP 00112962A EP 00112962 A EP00112962 A EP 00112962A EP 1063391 A2 EP1063391 A2 EP 1063391A2
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EP
European Patent Office
Prior art keywords
valve
train according
valve train
collar
spring
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
EP00112962A
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German (de)
French (fr)
Other versions
EP1063391A3 (en
EP1063391B1 (en
Inventor
Walter Strzoda
Klaus Dr. Gebauer
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TRW Deutschland GmbH
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TRW Deutschland GmbH
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Publication date
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Publication of EP1063391A2 publication Critical patent/EP1063391A2/en
Publication of EP1063391A3 publication Critical patent/EP1063391A3/en
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Publication of EP1063391B1 publication Critical patent/EP1063391B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • F01L1/462—Valve return spring arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/32—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for rotating lift valves, e.g. to diminish wear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/10—Connecting springs to valve members

Definitions

  • the invention relates to a valve train for controlling the gas exchange in Internal combustion engines with the valve always in its required position holding valve spring between the valve plate and one towards the Valve axis adjustable valve spring bearing is clamped.
  • valve clearance between the tappet foot and the camshaft can be changed and thus adjusted by screwing.
  • a ring gear-like locking device is provided, in which the ram foot engages with external teeth.
  • the valve clearance can also be adjusted via the armature of an electromagnetic drive. In this valve lash adjuster, too, the distance between the actuating element and the valve stem is changed via a locking screw that oscillates with the armature.
  • the invention has for its object to provide a valve train of the type mentioned with which the setting of a defined spring preload can be carried out for each individual valve. Furthermore, a suitable connection between the parts that allow the setting of a defined spring preload and the valve stem seal should simplify securing individual parts against loss and assembly and disassembly at the customer.
  • the invention achieves the object by means of a valve train with the characterizing features of patent claim 1. Advantageous refinements are the subject of the subclaims and are explained below.
  • the solution according to the invention enables the valve spring preload to be set to a defined value, e.g. B. also with a camshaft-less valve train.
  • a defined value e.g. B. also with a camshaft-less valve train.
  • a camshaft-less valve train can reduce energy consumption to one minimum value can be reduced.
  • camshaftless, e.g. B. electromechanical Valve train the spring preloads of all valves can be set to the same level become. Different tolerances can be eliminated. Therefore, the energy requirement for all valves are the same and low according to the theoretically required force. If such a setting were not used, the energy consumption would have to be higher can be used to overcome even high forces of strong springs.
  • the adjustable valve spring bearing 1 consists of two interlocking adjusting rings 2 and 3.
  • the inner collar 2 has a radially inwardly extending Support surface 4 for supporting the valve spring 12.
  • the inner collar is in his Provide an upper collar 5 in the upper area. This points over his Set pressure surfaces 6a to 6c distributed around the circumference. However, it can also more than three signal pressure areas distributed over the circumference Find.
  • the outer circumference of the federal government 5 shows several, distributed over its circumference arranged flats 7 to attach an adjusting tool to the inner Turn the collar 2 against the outer one to adjust the spring.
  • the outer ring 3 is provided on its side facing the actuating pressure surfaces 6a to 6c of the inner adjusting ring 2 with congruent actuating pressure surfaces 8a to 8c which are operatively connected to the actuating pressure surfaces 6a to 6c. All signal pressure areas are profiled to create a positive connection between the areas involved.
  • the example shows a directional toothing with flat tooth flanks of different lengths and included flank or wedge angles of 112 °, as the details of FIGS. 8 and 11 show.
  • the inner collar 2 in Direction of the arrow 11 rotated so that the locking teeth 9 with their long Flanks 9a can slide on the long flanks 10a of the locking teeth 10 until they are with their steeper short flanks 9b behind the corresponding short flanks 10b Grasp locking teeth 10 of the outer collar. Because the teeth on thread-like increasing signal pressure surfaces are arranged, the bearing surface 4 raised and the valve spring increasingly compressed until the spring force has reached a predetermined value. In this way, every single valve spring of an engine can be set to the same value.
  • FIGS. 12 to 15 show a further embodiment of the invention, wherein identical parts are provided with the same reference numbers.
  • the outer adjusting ring 103 resting on the cylinder head (not shown) is provided with a collar-shaped extension 117 which engages through the central bore 118 of the inner adjusting ring 102.
  • depressions 120 are provided for receiving correspondingly shaped thickenings of the cylinder head surface.
  • the outline of the inner adjusting ring shows a hexagon for attaching an adjusting tool.
  • FIG. 15 shows the assembly example of a valve 20, the stem 21 of which is conventional Is guided in a valve guide 22 seated in the cylinder head 23.
  • the valve is at its upper end by multi-groove valve cone pieces 24, which with their Raising beads in the recess 25 of the valve stem end with the not shown Spring plate connected.
  • the valve stem 21 is provided with a valve stem seal 26.
  • the outer The end of the valve stem seal is sealed against by a hose spring 27 the valve stem surface pressed.
  • the inner end of the valve stem seal is with a metal bushing 28 vulcanized together. This sits in under slight pressure the central bore 121 of the outer collar 103.
  • the press fit ensures a captive connection between the valve stem seal and the outer Collar 103 after pre-assembly.
  • the gearing between the a locking compound for example an adhesive, is introduced into both adjusting rings that hardens under pressure and ensures a captive connection.
  • the edge of the collar-shaped extension 117 can be slightly deformed, for example, so that the collars 102 and 103 and the Collar with press fit valve stem seal 26 an captive unit form. It is after inserting the valve in the cylinder head over the Valve stem end pushed and positioned on the cylinder head. In addition to the Incorrect assembly is impossible if individual elements cannot be lost.

Abstract

The valve is retained in position by a valve spring held between spring plate and spring bearing. The adjustable valve spring bearing consists of meshing adjusting rings (102,103), which are turned in opposite directions. The inner ring (102) has a surface (104) to support the valve spring, and during turning against the outer ring is moved in direction of the valve axis. Both rings have elements esp. profiling, to prevent turning in the opposite direction.

Description

Die Erfindung betrifft einen Ventiltrieb zur Steuerung des Gaswechsels in Verbrennungskraftmaschinen mit einer das Ventil stets in seiner geforderten Stellung haltenden Ventilfeder, die zwischen dem Ventilteller und einem in Richtung der Ventilachse verstellbaren Ventilfederlager eingespannt ist.The invention relates to a valve train for controlling the gas exchange in Internal combustion engines with the valve always in its required position holding valve spring between the valve plate and one towards the Valve axis adjustable valve spring bearing is clamped.

Zum schnellen Einstellen des Ventilbetriebsspiels ist es durch die DE-OS 24 39 674 bekannt, das Ende eines Ventilschafts mit einem aufgeschraubten Stösselfuß zu versehen. Durch Schraubdrehungen kann das Ventilspiel zwischen dem Stösselfuß und der Nockenwelle verändert und damit eingestellt werden. Zur Fixierung einer einmal vorgenommenen Einstellung über einen längeren Betriebszeitraum ist eine zahnkranzähnliche Sperreinrichtung vorgesehen, in welchen der Stösselfuß mit einer Außenverzahnung greift.
Bei einem nockenwellenlosen Ventiltrieb nach der DE-OS 197 41 568 kann das Ventilspiel ebenfalls über den Anker eines elektromagnetischen Antriebs eingestellt werden. Auch bei dieser Ventilspieleinstellvorrichtung wird der Abstand zwischen dem Betätigungselement und dem Ventilschaft über eine mit dem Anker oszillierende Feststellschraube verändert. Eine ungewollte Verstellung durch Motorvibrationen wird durch ein federbelastetes Rastelement, das auf ein verzahntes Verstellsegment wirkt, verhindert.
Die beiden bekannten Ausführungen bieten keine Einflußnahme auf die Größe der Ventilkraft. Durch Herstellungstoleranzen der beteiligten Ventiltriebelemente, die sich addieren können, ergeben sich jedoch häufig unterschiedliche Federvorspannungen. Insbesondere beim nockenwellenlosen Ventiltrieb besteht die Forderung nach einer für alle Ventile gleichen Federvorspannung. Daher muß die Federvorspannung wegen der unterschiedlichen Toleranzen für jedes Ventil einzeln einstellbar sein. Das gilt insbesondere für den elektromechanischen Ventiltrieb. Bei fehlender Einstellbarkeit der Federvorspannung muß der Energieaufwand für den Ventiltrieb höher angesetzt werden, um auch hohe Kräfte starker Federn überwinden zu können.For quick adjustment of the valve operating play, it is known from DE-OS 24 39 674 to provide the end of a valve stem with a screwed-on plunger foot. The valve clearance between the tappet foot and the camshaft can be changed and thus adjusted by screwing. To fix a setting once made over a longer operating period, a ring gear-like locking device is provided, in which the ram foot engages with external teeth.
In a camshaft-less valve train according to DE-OS 197 41 568, the valve clearance can also be adjusted via the armature of an electromagnetic drive. In this valve lash adjuster, too, the distance between the actuating element and the valve stem is changed via a locking screw that oscillates with the armature. An unwanted adjustment due to engine vibrations is prevented by a spring-loaded locking element that acts on a toothed adjustment segment.
The two known designs offer no influence on the size of the valve force. Due to the manufacturing tolerances of the valve train elements involved, which can add up, however, different spring preloads often result. Particularly in the case of the camshaft-less valve train, there is a requirement for the spring preload being the same for all valves. Therefore, the spring preload must be individually adjustable for each valve due to the different tolerances. This applies in particular to the electromechanical valve train. If the spring preload cannot be adjusted, the energy expenditure for the valve train must be set higher in order to be able to overcome high forces of strong springs.

Der Erfindung liegt die Aufgabe zugrunde, einen Ventiltrieb der einleitend genannten Gattung zu schaffen, mit dem die Einstellung einer definierten Federvorspannung für jedes einzelne Ventil ausführbar ist. Ferner sollen durch eine geeignete Verbindung zwischen den die Einstellung einer definierten Federvorspannung ermöglichenden Teilen und der Ventilschaftabdichtung eine Sicherung einzelner Teile gegen Verlust und die Montage und Demontage beim Kunden vereinfacht werden. Die Erfindung löst die Aufgabe durch einen Ventiltrieb mit den kennzeichnenden Merkmalen des Patentanspruchs 1.
Vorteilhafte Ausgestaltungen sind Gegenstand der Unteransprüche und werden nachfolgend erläutert.The invention has for its object to provide a valve train of the type mentioned with which the setting of a defined spring preload can be carried out for each individual valve. Furthermore, a suitable connection between the parts that allow the setting of a defined spring preload and the valve stem seal should simplify securing individual parts against loss and assembly and disassembly at the customer. The invention achieves the object by means of a valve train with the characterizing features of patent claim 1.
Advantageous refinements are the subject of the subclaims and are explained below.

Die erfindungsgemäße Lösung ermöglicht die Einstellung der Ventilfedervorspannung auf einen definierten Wert, z. B. auch bei einem nockenwellenlosen Ventiltrieb. Durch die feingestufte, selbsthemmende, manuelle Verstellbarkeit, unabhängig z. B. von Federkräften, einer Toleranzaddierung und mechanischen Einflüssen, läßt sich die definierte Federvorspannung eines jeden Ventils separat einstellen. Besonders bei einem nockenwellenlosen Ventiltrieb kann dadurch der Energieverbrauch auf einen minimalen Wert gesenkt werden. Im nockenwellenlosen, z. B. elektromechanischen Ventiltrieb, können die Federvorspannungen aller Ventile gleich hoch eingestellt werden. Unterschiedliche Toleranzen sind elimierbar. Daher ist der Energiebedarf für alle Ventile gleich und entsprechend der theoretisch erforderlichen Kraft gering. Würde eine derartige Einstellung nicht verwendet, müßte der Energieaufwand höher angesetzt werden, um auch hohe Kräfte starker Federn überwinden zu können.The solution according to the invention enables the valve spring preload to be set to a defined value, e.g. B. also with a camshaft-less valve train. By the finely graded, self-locking, manual adjustability, independently z. B. from Spring forces, tolerance addition and mechanical influences, can be Set the defined spring preload for each valve separately. Especially at A camshaft-less valve train can reduce energy consumption to one minimum value can be reduced. In camshaftless, e.g. B. electromechanical Valve train, the spring preloads of all valves can be set to the same level become. Different tolerances can be eliminated. Therefore, the energy requirement for all valves are the same and low according to the theoretically required force. If such a setting were not used, the energy consumption would have to be higher can be used to overcome even high forces of strong springs.

In der Zeichnung sind zwei Ausführungsbeispiele der Erfindung schematisch dargestellt und nachstehend erläutert. Es zeigen:

Figur 1
die Draufsicht auf das einstellbare Ventilfederlager einer ersten Ausführung,
Figur 2
die Seitenansicht des inneren Stellringes des Ventilfederlagers, z. T. im Schnitt,
Figur 3
die Seitenansicht des äußeren Stellringes des Ventilfederlagers, z. T. im Schnitt,
Figur 4
eine weitere Seitenansicht des inneren Stellrings,
Figur 5
die Draufsicht auf den inneren Stellring,
Figur 6
die Ansicht des inneren Stellrings von unten,
Figur 7
den Schnitt B-B (gemäß Fig. 6) durch den inneren Stellring,
Figur 8
eine Einzelheit im Bereich der Stelldruckflächen des inneren Stellrings,
Figur 9
eine weitere Seitenansicht des äußeren Stellrings,
Figur 10
die Draufsicht auf den äußeren Stellring,
Figur 11
eine Einzelheit des äußeren Stellrings im Bereich der verzahnten Stelldruckflächen,
Figur 12
das Montagebild einer zweiten Ausführung eines einstellbaren Ventilfederlagers,
Figur 13
eine Seitenansicht des Ventilfederlagers nach Figur 12,
Figur 14
die Draufsicht auf das Ventilfederlager nach Figur 13 und
Figur 15
eine Montageeinheit bestehend aus dem Ventilfederlager nach den Figuren 12 bis 13 und einer Ventilschaftabdichtung.
In the drawing, two embodiments of the invention are shown schematically and explained below. Show it:
Figure 1
the top view of the adjustable valve spring bearing of a first embodiment,
Figure 2
the side view of the inner collar of the valve spring bearing, for. T. on average,
Figure 3
the side view of the outer collar of the valve spring bearing, for. T. on average,
Figure 4
another side view of the inner collar,
Figure 5
the top view of the inner collar,
Figure 6
the view of the inner collar from below,
Figure 7
the section BB (according to FIG. 6) through the inner collar,
Figure 8
a detail in the area of the set pressure surfaces of the inner set ring,
Figure 9
another side view of the outer collar,
Figure 10
the top view of the outer collar,
Figure 11
a detail of the outer collar in the area of the toothed signal pressure surfaces,
Figure 12
the assembly picture of a second embodiment of an adjustable valve spring bearing,
Figure 13
12 shows a side view of the valve spring bearing according to FIG. 12,
Figure 14
the top view of the valve spring bearing according to Figure 13 and
Figure 15
an assembly unit consisting of the valve spring bearing according to Figures 12 to 13 and a valve stem seal.

Das verstellbare Ventilfederlager 1 besteht aus zwei ineinanderfassenden Stellringen 2 und 3. Der innere Stellring 2 weist eine sich radial einwärts erstreckende Auflagefläche 4 zur Auflage der Ventilfeder 12 auf. Der innere Stellring ist in seinem oberen Bereich mit einem äußeren Bund 5 versehen. Dieser weist über seinen Umfang verteilt angeordnete Stelldruckflächen 6a bis 6c auf. Es können jedoch auch mehr als drei auf dem Umfang verteilt angeordnete Stelldruckflächen Anwendung finden. Der Außenumfang des Bundes 5 zeigt mehrere, über seinen Umfang verteilt angeordnete Abflachungen 7 zum Ansatz eines Stellwerkzeugs, um den inneren Stellring 2 gegen den äußeren zur Federeinstellung zu verdrehen.The adjustable valve spring bearing 1 consists of two interlocking adjusting rings 2 and 3. The inner collar 2 has a radially inwardly extending Support surface 4 for supporting the valve spring 12. The inner collar is in his Provide an upper collar 5 in the upper area. This points over his Set pressure surfaces 6a to 6c distributed around the circumference. However, it can also more than three signal pressure areas distributed over the circumference Find. The outer circumference of the federal government 5 shows several, distributed over its circumference arranged flats 7 to attach an adjusting tool to the inner Turn the collar 2 against the outer one to adjust the spring.

Der äußere Ring 3 ist an seiner den Stelldruckflächen 6a bis 6c des inneren Stellrings 2 zugewandten Seite mit kongruenten Stelldruckflächen 8a bis 8c ausgestattet, die mit den Stelldruckflächen 6a bis 6c in Wirkverbindung stehen.
Alle Stelldruckflächen sind mit einer Profilierung versehen, um einen Formschluß zwischen den beteiligten Flächen herzustellen. Das Beispiel zeigt eine Richtverzahnung mit unterschiedlich langen ebenen Zahnflanken und eingeschlossenen Flanken- oder Keilwinkeln von 112°, wie die Einzelheiten der Figuren 8 und 11 zeigen.The outer ring 3 is provided on its side facing the actuating pressure surfaces 6a to 6c of the inner adjusting ring 2 with congruent actuating pressure surfaces 8a to 8c which are operatively connected to the actuating pressure surfaces 6a to 6c.
All signal pressure areas are profiled to create a positive connection between the areas involved. The example shows a directional toothing with flat tooth flanks of different lengths and included flank or wedge angles of 112 °, as the details of FIGS. 8 and 11 show.

Zum Einstellen einer vorgegebenen Federstärke wird der innere Stellring 2 in Richtung des Bogenpfeiles 11 gedreht, so daß die Rastzähne 9 mit ihren langen Flanken 9a auf den langen Flanken 10a der Rastzähne 10 gleiten können, bis sie mit ihren steileren kurzen Flanken 9b hinter die entsprechenden kurzen Flanken 10b der Rastzähne 10 des äußeren Stellrings fassen. Da die Zähne auf gewindeartig steigenden Stelldruckflächen angeordnet sind, werden dabei die Auflagefläche 4 angehoben und die Ventilfeder zunehmend zusammengedrückt, bis die Federkraft einen vorgegebenen Wert erreicht hat. Auf diese Weise ist jede einzelne Ventilfeder eines Motors auf den gleichen Wert einstellbar.To set a predetermined spring strength, the inner collar 2 in Direction of the arrow 11 rotated so that the locking teeth 9 with their long Flanks 9a can slide on the long flanks 10a of the locking teeth 10 until they are with their steeper short flanks 9b behind the corresponding short flanks 10b Grasp locking teeth 10 of the outer collar. Because the teeth on thread-like increasing signal pressure surfaces are arranged, the bearing surface 4 raised and the valve spring increasingly compressed until the spring force has reached a predetermined value. In this way, every single valve spring of an engine can be set to the same value.

Die Figuren 12 bis 15 zeigen ein weiteres Ausführungsbeispiel der Erfindung, wobei gleiche Teile mit gleichen Bezugsziffern versehen sind.Figures 12 to 15 show a further embodiment of the invention, wherein identical parts are provided with the same reference numbers.

Der äußere, auf dem nicht dargestellten Zylinderkopf aufliegende Stellring 103 ist mit einem kragenförmigen Ansatz 117 versehen, der durch die zentrale Bohrung 118 des inneren Stellrings 102 greift. An der dem Zylinderkopf zugewandten Auflagefläche 119 des äußeren Stellrings sind Vertiefungen 120 zur Aufnahme entsprechend geformter Verdickungen der Zylinderkopffläche vorgesehen.
Wie die Draufsicht die Figur 14 erkennen läßt, zeigt der Umriß des inneren Stellrings ein Sechseck zum Ansetzen eines Stellwerkzeugs.The outer adjusting ring 103 resting on the cylinder head (not shown) is provided with a collar-shaped extension 117 which engages through the central bore 118 of the inner adjusting ring 102. On the bearing surface 119 of the outer adjusting ring facing the cylinder head, depressions 120 are provided for receiving correspondingly shaped thickenings of the cylinder head surface.
As can be seen from the top view in FIG. 14, the outline of the inner adjusting ring shows a hexagon for attaching an adjusting tool.

Die Figur 15 zeigt das Montagebeispiel eines Ventils 20, dessen Schaft 21 in üblicher Weise in einer im Zylinderkopf 23 sitzenden Ventilführung 22 geführt ist. Das Ventil wird an seinem oberen Ende durch Mehrrillenventilkegelstücke 24, die mit ihren Wülsten in den Einstich 25 des Ventilschaftendes greifen, mit dem nicht dargestellten Federteller verbunden.FIG. 15 shows the assembly example of a valve 20, the stem 21 of which is conventional Is guided in a valve guide 22 seated in the cylinder head 23. The valve is at its upper end by multi-groove valve cone pieces 24, which with their Raising beads in the recess 25 of the valve stem end with the not shown Spring plate connected.

Der Ventilschaft 21 ist mit einer Ventilschaftabdichtung 26 versehen. Das äußere Ende der Ventilschaftabdichtung wird durch eine Schlauchfeder 27 dichtend gegen die Ventilschaftfläche gedrückt. Das innere Ende der Ventilschaftabdichtung ist mit einer Metallbuchse 28 zusammenvulkanisiert. Diese sitzt unter leichter Pressung in der zentralen Bohrung 121 des äußeren Stellringes 103. Der Preßsitz sorgt für eine unverlierbare Verbindung zwischen der Ventilschaftabdichtung und dem äußeren Stellring 103 nach der Vormontage. Zusätzlich kann in die Verzahnung zwischen den beiden Stellringen eine Sicherungsmasse, beispielsweise ein Kleber eingebracht werden, der unter Druck aushärtet und für eine unverlierbare Verbindung sorgt. Zusätzlich kann die Kante des kragenförmigen Ansatzes 117 leicht verformt, beispielsweise gebärdelt werden, so daß die Stellringe 102 und 103 und die im Kragen mit Preßsitz angeordnete Ventilschaftabdichtung 26 eine unverlierbare Einheit bilden. Sie wird nach dem Einsetzen des Ventils in den Zylinderkopf über das Ventilschaftende geschoben und auf dem Zylinderkopf positioniert. Neben der Unverlierbarkeit einzelner Elemente ist eine falsche Montage ausgeschlossen.The valve stem 21 is provided with a valve stem seal 26. The outer The end of the valve stem seal is sealed against by a hose spring 27 the valve stem surface pressed. The inner end of the valve stem seal is with a metal bushing 28 vulcanized together. This sits in under slight pressure the central bore 121 of the outer collar 103. The press fit ensures a captive connection between the valve stem seal and the outer Collar 103 after pre-assembly. In addition, the gearing between the a locking compound, for example an adhesive, is introduced into both adjusting rings that hardens under pressure and ensures a captive connection. In addition, the edge of the collar-shaped extension 117 can be slightly deformed, for example, so that the collars 102 and 103 and the Collar with press fit valve stem seal 26 an captive unit form. It is after inserting the valve in the cylinder head over the Valve stem end pushed and positioned on the cylinder head. In addition to the Incorrect assembly is impossible if individual elements cannot be lost.

Claims (20)

Ventiltrieb zur Steuerung des Gaswechsels in Verbrennungskraftmaschinen mit einer das Ventil stets in seiner geforderten Stellung haltenden Ventilfeder, die zwischen dem Ventilfederteller und einem in Richtung der Ventilachse verstellbaren Ventilfederlager eingespannt ist, dadurch gekennzeichnet, daß das verstellbare Ventilfederlager aus zwei ineinanderfassenden und gegensinnig verdrehbaren Stellringen (2, 3; 102, 103) besteht, von welchen der innere Stellring (2, 102) eine Fläche (4, 104) zur Auflage der Ventilfeder (12) aufweist und durch das Verdrehen gegen den äußeren Stellring (3, 103) in Richtung der Ventilachse bewegbar ist, wobei die Stellringe Elemente (9, 10) zur Verhinderung einer Rückdrehung aufweisen.Valve train for controlling the gas exchange in internal combustion engines with a valve spring that always holds the valve in its required position between the valve spring plate and an adjustable in the direction of the valve axis Valve spring bearing is clamped, characterized in that the adjustable Valve spring bearing made of two interlocking and rotatable in opposite directions Collars (2, 3; 102, 103), of which the inner collar (2, 102) one Surface (4, 104) for supporting the valve spring (12) and by twisting is movable against the outer adjusting ring (3, 103) in the direction of the valve axis, the collars elements (9, 10) to prevent reverse rotation exhibit. Ventiltrieb nach Anspruch 1, dadurch gekennzeichnet, daß die Stellringe mit aufeinandergleitenden, gewindeförmig steigenden Stelldruckflächen (6a, 6b, 6c; 8a, 8b, 8c) ausgeführt sind. Valve train according to claim 1, characterized in that the adjusting rings with on top of each other, thread-increasing signal pressure surfaces (6a, 6b, 6c; 8a, 8b, 8c) are executed. Ventiltrieb nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Stelldruckflächen mit selbsthemmenden und formschlüssig ineinandergreifenden Profilierungen (9, 10) zur Verhinderung von Rückstellbewegungen versehen sind.Valve train according to claim 1 or 2, characterized in that the Contact pressure areas with self-locking and interlocking interlocking Profilings (9, 10) are provided to prevent return movements. Ventiltrieb nach Anspruch 3, dadurch gekennzeichnet, daß die Stelldruckflächen mit Rastkerben versehen sind.Valve train according to claim 3, characterized in that the Contact pressure areas are provided with notches. Ventiltrieb nach Anspruch 4, dadurch gekennzeichnet, daß die Stelldruckflächen mit einer richtungsabhängig wirkenden Sperrverzahnung (9, 10) ausgerüstet sind.Valve train according to claim 4, characterized in that the Signal pressure areas with a direction-dependent locking toothing (9, 10) are equipped. Ventiltrieb nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der innere Stellring (2, 102) eine Auflagefläche (4, 104) für die Ventilfeder (12) aufweist, und mit seinen Stelldruckflächen (6a - 6c) von dem äußeren Ring (3) getragen wird, wobei dieser auf dem Zylinderkopf aufliegt.Valve train according to one of claims 1 to 5, characterized in that the inner adjusting ring (2, 102) has a bearing surface (4, 104) for the valve spring (12) and with its signal pressure surfaces (6a - 6c) from the outer ring (3) is worn, which rests on the cylinder head. Ventiltrieb nach Anspruch 6, dadurch gekennzeichnet, daß der unmittelbar auf dem Zylinderkopf (23) sitzende oder äußere Stellring (3, 103) durch einen Formschluß mit dem Zylinderkopf gegen Verdrehung gesichert ist.Valve train according to claim 6, characterized in that the immediately on the cylinder head (23) seated or outer collar (3, 103) by a Form locking with the cylinder head is secured against rotation. Ventiltrieb nach Anspruch 7, dadurch gekennzeichnet, daß der Außenring mit einer unrund gestalteten Außenkontur in einer entsprechend gestalteten Vertiefung des Zylinderkopfes ruht.Valve train according to claim 7, characterized in that the outer ring with a non-circular outer contour in a correspondingly designed Deepening of the cylinder head rests. Ventiltrieb nach Anspruch 7, dadurch gekennzeichnet, daß der äußere Stellring an seiner Auflagefläche mit Vertiefungen (120) zur Aufnahme von Erhöhungen des Zylinderkopfes versehen ist.Valve train according to claim 7, characterized in that the outer Collar on its support surface with recesses (120) for receiving Elevations of the cylinder head is provided. Ventiltrieb nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Außenkontur des Außenringes aus zwei gleichen Teilkreisen (13, 14) besteht, deren Konstruktionsmittelpunkte einen Abstand zueinander aufweisen und deren Enden durch Geraden (15, 16) miteinander verbunden sind. Valve train according to one of claims 1 to 8, characterized in that the outer contour of the outer ring consists of two equal part circles (13, 14), whose construction centers are spaced from each other and whose Ends are connected by straight lines (15, 16). Ventiltrieb nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Stellringe jeweils mit wenigstens drei Stelldruckflächen (6a - 6c; 8a - 8c) ausgerüstet sind, die paarweise aneinander liegen.Valve train according to one of claims 1 to 9, characterized in that the adjusting rings each with at least three signal pressure surfaces (6a - 6c; 8a - 8c) are equipped, which are in pairs to each other. Ventiltrieb nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Außenkontur des Innenringes mit Ansatzflächen (7) für ein Stellwerkzeug versehen sind.Valve train according to one of claims 1 to 10, characterized in that the outer contour of the inner ring with attachment surfaces (7) for an adjusting tool are provided. Ventiltrieb nach Anspruch 12, dadurch gekennzeichnet, daß der Innenring (102) polygonal gestaltet ist.Valve train according to claim 12, characterized in that the inner ring (102) is polygonal. Ventiltrieb nach Anspruch 13, dadurch gekennzeichnet, daß die Außenkontur des Innenringes ein Sechseck bildet.Valve train according to claim 13, characterized in that the outer contour of the inner ring forms a hexagon. Ventiltrieb nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, daß der Ventilschaft (21) mit einer Abdichtung (26) versehen ist, die mit dem Ventilfederlager kraftschlüssig verbunden ist.Valve train according to one of claims 1 to 14, characterized in that the valve stem (21) is provided with a seal (26) with the Valve spring bearing is non-positively connected. Ventiltrieb nach Anspruch 15, dadurch gekennzeichnet, daß das den Ventilschaft abdichtende, elastomere Material mit einer dieses umgebenden Metallbuchse (28) zusammenvulkanisiert und die Buchse mit Preßsitz in einem kragenförmigen Ansatz (117) eines der Stellringes angeordnet ist.Valve train according to claim 15, characterized in that the Valve stem sealing, elastomeric material with a surrounding Vulcanized metal bushing (28) and the socket with a press fit in one collar-shaped extension (117) of one of the adjusting rings is arranged. Ventiltrieb nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, daß die Stellringe nach dem Zusammenfügen so verformt sind, daß ein Auseinanderfallen verhindert, eine Federkrafteinstellung jedoch uneingeschränkt möglich ist.Valve train according to one of claims 1 to 16, characterized in that the collars are deformed so that a Prevents falling apart, but an unrestricted adjustment of the spring force is possible. Ventiltrieb nach Anspruch 17, dadurch gekennzeichnet, daß der unmittelbar auf dem Zylinderkopf (23) sitzende oder äußere Stellring (103) in vormontierter Position mit seinem Kragen (117) durch den inneren Stellring (102) hindurchgreift, wobei der Kragenrand mit wenigstens einer Materialverformung versehen ist.Valve train according to claim 17, characterized in that the immediately on the cylinder head (23) seated or outer collar (103) in pre-assembled Reaches with its collar (117) through the inner adjusting ring (102), the collar edge being provided with at least one material deformation. Ventiltrieb nach einem der Ansprüche 1 bis 18, dadurch gekennzeichnet, daß zwischen den Zahnelementen eine Sicherungsmasse zur kraftschlüssigen Verbindung der Metallflächen eingebracht ist.Valve train according to one of claims 1 to 18, characterized in that a locking compound between the tooth elements for non-positive locking Connection of the metal surfaces is introduced. Ventiltrieb nach Anspruch 19, dadurch gekennzeichnet, daß als Sicherungsmasse ein durch Druck abbindender Kleber eingebracht ist.Valve train according to claim 19, characterized in that as Locking compound a pressure setting adhesive is introduced.
EP00112962A 1999-06-21 2000-06-20 Valve drive for an internal combustion engine Expired - Lifetime EP1063391B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19928284 1999-06-21
DE19928284A DE19928284A1 (en) 1999-06-21 1999-06-21 Valve train for internal combustion engines

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EP1063391A2 true EP1063391A2 (en) 2000-12-27
EP1063391A3 EP1063391A3 (en) 2001-05-02
EP1063391B1 EP1063391B1 (en) 2004-10-20

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US (1) US6279526B1 (en)
EP (1) EP1063391B1 (en)
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JP6083398B2 (en) * 2014-02-21 2017-02-22 トヨタ自動車株式会社 Valve rotation device

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Publication number Priority date Publication date Assignee Title
CN103437848B (en) * 2013-08-29 2015-12-02 刘军 Engine valve spring tension-adjusting gear

Also Published As

Publication number Publication date
DE19928284A1 (en) 2000-12-28
EP1063391A3 (en) 2001-05-02
US6279526B1 (en) 2001-08-28
DE50008293D1 (en) 2004-11-25
EP1063391B1 (en) 2004-10-20

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