EP1063391B1 - Valve drive for an internal combustion engine - Google Patents
Valve drive for an internal combustion engine Download PDFInfo
- Publication number
- EP1063391B1 EP1063391B1 EP00112962A EP00112962A EP1063391B1 EP 1063391 B1 EP1063391 B1 EP 1063391B1 EP 00112962 A EP00112962 A EP 00112962A EP 00112962 A EP00112962 A EP 00112962A EP 1063391 B1 EP1063391 B1 EP 1063391B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- drive according
- valve drive
- collar
- cylinder head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 3
- 229920001971 elastomer Polymers 0.000 claims 2
- 239000000806 elastomer Substances 0.000 claims 2
- 230000001419 dependent effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 230000036316 preload Effects 0.000 description 9
- 238000005265 energy consumption Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- 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 spring plate and one towards the Valve axis adjustable valve spring bearing is clamped, the adjustable Valve spring bearing made of two interlocking and rotatable in opposite directions Collars exist.
- 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 set 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.
- DE 4 129 637 A shows a generic valve train.
- This valve train has two mutually rotatable adjusting rings, the on one adjusting ring Valve spring is supported. Both collars are connected by balls, so that by rotating them on these balls their rotational position to each other can change.
- 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 enable 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 solves the problem 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 setting of Valve spring preload to a defined value, e.g. B. also with one camshaftless valve train. Due to the finely graded, self-locking, manual Adjustability, independently z. B. of spring forces, a tolerance addition and mechanical influences, the defined spring preload of each Adjust valve separately. Especially with a camshaft-less valve train this reduces energy consumption to a minimum. in the camshaft-less, e.g. B. electromechanical valve train, can Spring preloads of all valves are set to the same level. different Tolerances can be eliminated. Hence 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 high forces of strong springs.
- a defined value e.g. B. also with one camshaftless valve train. Due to the finely graded, self-locking, manual Adjustability, independently z. B. of spring forces,
- 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 for the attachment of a setting 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 bow 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 same 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, be flanged 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 cannot be lost.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
Die Erfindung betrifft einen 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, wobei das verstellbare Ventilfederlager aus zwei ineinanderfassenden und gegensinnig verdrehbaren Stellringen besteht.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 spring plate and one towards the Valve axis adjustable valve spring bearing is clamped, the adjustable Valve spring bearing made of two interlocking and rotatable in opposite directions Collars exist.
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 set 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. Unintended 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 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 the high forces of strong springs.
In der DE 4 129 637 A ist ein gattungsgemäßer Ventiltrieb gezeigt. Dieser Ventiltrieb
weist zwei zueinander verdrehbare Stellringe auf, wobei auf einem Stellring die
Ventilfeder abgestützt ist. Beide Stellringe sind über Kugeln miteinander verbunden,
so daß sie durch ein Verdrehen auf diesen Kugeln ihre Drehposition zueinander
ändern können.
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 enable 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 solves the problem by means of a valve train with the characterizing features of
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 setting of Valve spring preload to a defined value, e.g. B. also with one camshaftless valve train. Due to the finely graded, self-locking, manual Adjustability, independently z. B. of spring forces, a tolerance addition and mechanical influences, the defined spring preload of each Adjust valve separately. Especially with a camshaft-less valve train this reduces energy consumption to a minimum. in the camshaft-less, e.g. B. electromechanical valve train, can Spring preloads of all valves are set to the same level. different Tolerances can be eliminated. Hence 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 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.
- 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
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
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
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 same 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
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
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 gebördelt 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
Claims (19)
- A valve drive for controlling the gas-exchange cycle in internal combustion engines, with a valve spring (12) that always holds the valve in its required position and is braced between a valve spring retainer and a valve spring bearing (1) that can be adjusted in the direction of the valve axis, wherein the adjustable valve spring bearing consists of two mated set collars (2, 3; 102, 103) that can be turned in opposite directions,
characterized in that the inner set collar (2, 102) contains a surface (4, 104) for supporting the valve spring (12) and can be displaced in the direction of the valve axis by being turned relative to the outer set collar (3, 103), in
that the set collars contain elements (9, 10) for preventing a reversed rotation, and in
that the set collars are realized with pressing surfaces (6a, 6b, 6c; 8a, 8b, 8c) that are realized with a thread-like pitch and slide on one another. - The valve drive according to Claim 1, characterized in that the pressing surfaces are provided with self-locking and positively engaging profiles (9, 10) in order to prevent reversed movements.
- The valve drive according to Claim 2, characterized in that the pressing surfaces are provided with index notches.
- The valve drive according to Claim 3, characterized in that the pressing surfaces are provided with teeth (9, 10) that interlock in a directionally dependent fashion.
- The valve drive according to one of Claims 1-4, characterized in that the pressing surfaces (6a-6c) of the inner set collar (2, 102) are carried by the outer collar (3) that lies on the cylinder head.
- The valve drive according to Claim 5, characterized in that the outer set collar (3, 103) or the set collar that is directly seated on the cylinder head (23) is prevented from turning by means of a positive connection with the cylinder head.
- The valve drive according to Claim 6, characterized in that the outer collar has a noncircular outside contour and lies in a correspondingly shaped depression of the cylinder head.
- The valve drive according to Claim 6, characterized in that the mounting surface of the outer set collar is provided with depressions (120) for accommodating elevations of the cylinder head.
- The valve drive according to one of Claims 1-7, characterized in that the outside contour of the outer collar consists of two identical reference circles (13, 14), the centers of which are spaced apart from one another and the ends of which are connected by straight sections (15, 16).
- The valve drive according to one of Claims 1-8, characterized in that the set collars are respectively provided with at least three pressing surfaces (6a-6c; 8a-8c) that adjoin one another in pairs.
- The valve drive according to one of Claims 1-9, characterized in that the outside contour of the inner collar is provided with surfaces (7) for attaching a setting tool.
- The valve drive according to Claim 11, characterized in that the inner collar (102) is realized polygonally.
- The valve drive according to Claim 12, characterized in that in outside contour of the inner collar forms a hexagon.
- The valve drive according to one of Claims 1-13, characterized in that the valve shaft (21) is provided with a seal (26) that is non-positively connected to the valve spring bearing.
- The valve drive according to Claim 14, characterized in that the elastomer material for sealing the valve shaft is vulcanized to a metal bushing (28) surrounding the elastomer material, and in that the bushing is arranged with the press fit in a neck-shaped projection (117) of one of the set collars.
- The valve drive according to one of Claims 1-15, characterized in that the set collars are deformed after having been mated, namely such that the set collars cannot fall apart and the spring force can be adjusted in an unrestricted fashion.
- The valve drive according to Claim 15 and 16, characterized in that the outer set collar (103) or the set collar that is directly seated on the cylinder head (23) penetrates through the inner set collar (102) with its neck (117) in the pre-assembled position, wherein the neck edge is provided with at least one material deformation.
- The valve drive according to one of Claims 4-17, characterized in that a safety mass for producing a non-positive connection between the metal surfaces is introduced between the tooth elements.
- The valve drive according to Claim 18, characterized in that the safety mass consists of an adhesive that sets under pressure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19928284A DE19928284A1 (en) | 1999-06-21 | 1999-06-21 | Valve train for internal combustion engines |
| DE19928284 | 1999-06-21 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1063391A2 EP1063391A2 (en) | 2000-12-27 |
| EP1063391A3 EP1063391A3 (en) | 2001-05-02 |
| EP1063391B1 true EP1063391B1 (en) | 2004-10-20 |
Family
ID=7911956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00112962A Expired - Lifetime EP1063391B1 (en) | 1999-06-21 | 2000-06-20 | Valve drive for an internal combustion engine |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6279526B1 (en) |
| EP (1) | EP1063391B1 (en) |
| DE (2) | DE19928284A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009015428B4 (en) * | 2009-03-27 | 2015-09-10 | Unovatis Gmbh | Compensation of an age-related change in length of a control element of a shape memory alloy |
| CN102562211A (en) * | 2012-02-21 | 2012-07-11 | 奇瑞汽车股份有限公司 | Valve spring lower seat of engine |
| CN103437848B (en) * | 2013-08-29 | 2015-12-02 | 刘军 | Engine valve spring tension-adjusting gear |
| JP6083398B2 (en) * | 2014-02-21 | 2017-02-22 | トヨタ自動車株式会社 | Valve rotation device |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3114361A (en) * | 1961-10-24 | 1963-12-17 | Wilbur L Mullen | Spring tension device |
| GB1473653A (en) | 1973-08-18 | 1977-05-18 | British Leyland Uk Ltd | Poppet valve and adjustable tappet assembly |
| US4469057A (en) * | 1979-07-09 | 1984-09-04 | Black Alfred A | Poppet valve spring retainer with integral mechanical adjustable tappet |
| JPS61501580A (en) * | 1984-02-20 | 1986-07-31 | ハ−デイ レジナルド ジヨン | Improved poppet valve |
| US5044330A (en) * | 1990-07-06 | 1991-09-03 | Havens Elwood L | Valve spring spacer |
| DE4129637C2 (en) * | 1991-09-06 | 1998-04-09 | Schaeffler Waelzlager Ohg | Device for changing the spring force of a valve spring |
| US5720468A (en) * | 1992-10-05 | 1998-02-24 | Aura Systems, Inc. | Staggered electromagnetically actuated valve design |
| DE4403510C2 (en) * | 1994-02-04 | 1995-11-30 | Bruss Dichtungstechnik | Valve module for internal combustion engines and method for its installation |
| KR0164488B1 (en) * | 1994-08-29 | 1998-12-15 | 전성원 | Device for adjusting valve light using out-door air |
| US5558054A (en) * | 1995-06-07 | 1996-09-24 | Southwest Research Institute | Variable preload system for valve springs |
| DE19641568A1 (en) | 1995-10-09 | 1997-06-19 | Edmund Florczak | Security lock with bolt moved by pinion turned by key |
| DE19741568A1 (en) | 1997-09-20 | 1999-03-25 | Heinz Leiber | Electromagnetic valve unit, for I.C. engines |
| DE19747009C2 (en) * | 1997-10-24 | 2000-11-16 | Daimler Chrysler Ag | Electromagnetic actuator for actuating a gas exchange valve |
-
1999
- 1999-06-21 DE DE19928284A patent/DE19928284A1/en not_active Withdrawn
-
2000
- 2000-02-18 US US09/506,769 patent/US6279526B1/en not_active Expired - Fee Related
- 2000-06-20 DE DE50008293T patent/DE50008293D1/en not_active Expired - Fee Related
- 2000-06-20 EP EP00112962A patent/EP1063391B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US6279526B1 (en) | 2001-08-28 |
| DE19928284A1 (en) | 2000-12-28 |
| EP1063391A2 (en) | 2000-12-27 |
| EP1063391A3 (en) | 2001-05-02 |
| DE50008293D1 (en) | 2004-11-25 |
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