EP0679798B1 - Arrangement for simultaneously driving two valves in an internal combustion engine - Google Patents
Arrangement for simultaneously driving two valves in an internal combustion engine Download PDFInfo
- Publication number
- EP0679798B1 EP0679798B1 EP95105779A EP95105779A EP0679798B1 EP 0679798 B1 EP0679798 B1 EP 0679798B1 EP 95105779 A EP95105779 A EP 95105779A EP 95105779 A EP95105779 A EP 95105779A EP 0679798 B1 EP0679798 B1 EP 0679798B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tappets
- valve
- cup
- pin
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
-
- 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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/245—Hydraulic tappets
- F01L1/25—Hydraulic tappets between cam and valve stem
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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
- F01L2305/00—Valve arrangements comprising rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F2001/244—Arrangement of valve stems in cylinder heads
- F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis
Definitions
- the invention relates to a device for simultaneous Actuation of two gas exchange valves of an internal combustion engine with only one acting on a role Control cam.
- Such a device is described in DE-OS 40 39 256, at which a beam-shaped bridge that in their end areas hydraulic lash adjusters has that with the valve stem ends of the gas exchange valves are in contact, in the cylinder head of the internal combustion engine parallel to the axes of the gas exchange valves is led.
- the invention is therefore based on the object, a generic To create facility with little Installation space is sufficient.
- this object is achieved in that a bucket tappet coaxially for each of the two gas exchange valves is assigned, the tappet guides on their sides facing each other by a parallel to the Valve movement direction connected shaft are the tappets by a bridging the shaft Bolts are connected and on the bolt the roller in operative connection with the control cam is.
- the cup tappets are each advantageously on the side facing the shaft is flattened.
- cup tappets can each in a manner known per se a hydraulic valve lash adjuster arranged be, which is with its top on the supports the bolt above it.
- the tappets in the tappet guides of the cylinder block can be done easily a cross hole from a main oil line from the valve balancing elements Oil supplied from the engine oil circuit will. Because the tappets by turning the bolt are hindered, there is no need for the circumference of the tappets Ring groove; the oil channels stand in this way for everyone Valve stroke opposite. Because the bolt is directly with the valve balancing element is in contact, the tappet has not to transmit valve actuation forces itself, but only management functions. So he can a light material such as B. light metal or also be made of heat-resistant plastic.
- An embodiment made of one material is particularly advantageous with the same thermal expansion as the material of the cylinder head, since this does not change the bearing clearance occurs with temperature changes.
- the bolt is advantageously in the area of the system the valve lash adjusters flattened.
- the bolt is preferably floating in the tappets stored.
- the bearing of the bolt takes the tolerances as well possible thermal expansion in the distance between the two tappets of the jointly operated gas exchange valves on.
- the Bolts only in the blind holes in the tappets floating, without the valve lash adjusters to grab.
- FIGS. 1 and 2 and 5 to 8 A first exemplary embodiment is shown in FIGS. 1 and 2 and 5 to 8.
- the cylinder head 1 of an internal combustion engine are two gas exchange valves 2, 3 one in common actuated valve group in the usual way Valve guide bushes 4, 5 and guided by valve springs 6, 7 held in their closed position on valve seats 8, 9.
- Each gas exchange valve 2, 3 is a tappet 10, 11 assigned to the in a tappet guide 12, 13 of the Cylinder head 1 is slidably guided.
- the cup tappets 10, 11 are facing towards each other Flattened sides 14, 15. Between Cup tappets 10, 11 are the tappet guides 12, 13 through a parallel with the axes of the gas exchange valves 2, 3 extending shaft 16 connected. Between the flats 14, 15 of the tappets 10, 11 runs - the Shaft 16 bridging - a bolt 17 in the tappets 10, 11 is floating. On the bolt 17, taking up the width of the shaft 16, is one Roll 18 stored. A control cam acts on the roller 18 19 a camshaft mounted in the cylinder head 1 20 a. There are hydraulic ones in the tappets 10, 11 Valve clearance compensation elements 21, 22, which deal with one side on the face of the associated valve stem 23, 24 support. The other side of the valve lash adjuster 21, 22 relies on each a flat 25, 26 of the bolt 17, which is thus extends over the valve clearance compensation elements 21, 22.
- control cam 19 Since the control cam 19 is wider than the roller 18 are recesses 32 on the top of the tappets 10, 11 provided which the free access of the circumferential cam tip to serve.
- FIGS. 3 and 4 and 5 to 8 Another embodiment is shown in FIGS. 3 and 4 and 5 to 8 shown, in which the valve clearance compensation elements 21, 22 on the bottom 30, 31 of the tappets Support 10 ', 11'.
- the bolt 17 ' is on the side in addition to the valve clearance compensation elements 21, 22 in the Cup tappets 10 ', 11' floating.
- the invention enables a large number of further exemplary embodiments. So z. B. on the side flats the tappet can be dispensed with if the Distance between the two gas exchange valves to be operated simultaneously is sufficiently large to be between the tappets the shaft for the role of the role to be able to order.
- the Cup tappets 10, 11 from a light less firm Material such as B. a light alloy or one heat-resistant plastic, since they are only here Management tasks for the valve clearance compensation elements 21, 22 have to take over.
- the valve actuation forces in contrast, the control cam 19 on the role 18, the bolt 17 and the valve clearance compensation elements 21, 22 transferred directly to the valve stems 23, 24.
Abstract
Description
Die Erfindung betrifft eine Einrichtung zur gleichzeitigen Betätigung zweier Gaswechselventile einer Brennkraftmaschine mit lediglich einem auf eine Rolle wirkenden Steuernocken.The invention relates to a device for simultaneous Actuation of two gas exchange valves of an internal combustion engine with only one acting on a role Control cam.
Eine derartige Einrichtung ist mit DE-OS 40 39 256 beschrieben, bei der eine balkenförmige Brücke, die in ihren Endbereichen hydraulische Spielausgleichselemente aufweist, die mit den Ventilschaftenden der Gaswechselventile in Kontakt stehen, im Zylinderkopf der Brennkraftmaschine parallel zu den Achsen der Gaswechselventile geführt ist. In der Mitte zwischen den beiden Spielausgleichselementen ist an der Brücke eine drehbar gelagerte Rolle angeordnet, gegen die ein Steuernocken unmittelbar anläuft.Such a device is described in DE-OS 40 39 256, at which a beam-shaped bridge that in their end areas hydraulic lash adjusters has that with the valve stem ends of the gas exchange valves are in contact, in the cylinder head of the internal combustion engine parallel to the axes of the gas exchange valves is led. In the middle between the two game compensation elements is a swivel mounted on the bridge Roller arranged against which a control cam immediately starts up.
Bei dieser Einrichtung sind somit neben den Ventilführungen parallel dazu zusätzliche Führungen für die balkenförmige Brücke erforderlich. Dies erfordert in dem ohnehin eng bemessenen Bauraum im Zylinderkopf zusätzlich Raum, der dann für andere notwendige Funktionsbereiche wie z. B. Öl- oder Kühlmittelführung, Zündkerzenschacht bzw. Einspritzdüsenschacht u. dgl. nicht mehr in gewünschtem Umfang zur Verfügung steht.With this device, there are thus next to the valve guides parallel to this, additional guides for the bar-shaped Bridge required. This requires anyway additional space in the cylinder head Space that is then used for other necessary functional areas such as B. oil or coolant routing, spark plug shaft or injector shaft u. No longer in the desired Scope is available.
Der Erfindung liegt somit die Aufgabe zugrunde, eine gattungsgemäße Einrichtung zu schaffen, welche mit geringem Bauraum auskommt.The invention is therefore based on the object, a generic To create facility with little Installation space is sufficient.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß jedem der beiden Gaswechselventile koaxial ein Tassenstößel zugeordnet ist, deren Stößelführungen auf ihren zueinander weisenden Seiten durch einen parallel zu der Ventilbewegungsrichtung verlaufenden Schacht verbunden sind, die Tassenstößel durch einen den Schacht überbrückenden Bolzen verbunden sind und auf dem Bolzen die mit dem Steuernocken in Wirkverbindung stehende Rolle gelagert ist.According to the invention this object is achieved in that a bucket tappet coaxially for each of the two gas exchange valves is assigned, the tappet guides on their sides facing each other by a parallel to the Valve movement direction connected shaft are the tappets by a bridging the shaft Bolts are connected and on the bolt the roller in operative connection with the control cam is.
Damit wird es möglich, in üblicher Weise geführte und von Tassenstößeln beaufschlagte Gaswechselventile einer gemeinsam öffnenden Ventilgruppe von nur einem Steuernocken über eine Rolle zu beaufschlagen. Der Bauaufwand ist im Verhältnis zu vergleichbaren Ventilbetätigungseinrichtungen gering und man kann weitestgehend auf bekannte und handelsübliche Bauteile zurückgreifen. Die erforderlichen Veränderungen am Zylinderkopfkörper gegenüber einer Ausführung mit einzeln betätigten Ventilen ist gering und bezieht sich im wesentlichen auf das Einbringen der Schächte zwischen den jeweiligen Tassenstößelführungen. Damit können die Werkzeugkosten bei einer Übernahme der Erfindung auf einen konservativ aufgebauten Motor minimal bleiben.This makes it possible to run and run in the usual way Bucket tappets acted upon by gas exchange valves opening valve group of only one control cam to act on a role. The construction effort is in Relationship to comparable valve actuation devices low and you can largely on known and use commercially available components. The necessary Changes to the cylinder head body compared to a version with individually operated valves is small and essentially refers to the introduction of the Shafts between the respective tappet guides. This means that the tool costs when taking over the Invention on a conservative engine minimal stay.
In vorteilhafter Weise sind die Tassenstößel jeweils an der zu dem Schacht weisenden Seite abgeflacht.The cup tappets are each advantageously on the side facing the shaft is flattened.
Durch diese Maßnahme kann der Mittenabstand zwischen den beiden Tassenstößeln der gleichzeitig zu betätigenden Gaswechselventile im Vergleich zu einer Ausführung mit über zwei Steuernocken direkt auf die Tassenstößel betätigten Ventilen gleich bleiben. Der Bauraum für die Rolle wird zwischen den beiden Tassenstößeln durch die Abflachungen geschaffen.With this measure, the center distance between the two tappets of the cup to be operated simultaneously Gas exchange valves compared to a version with Actuated directly onto the tappets via two control cams Valves remain the same. The space for the role between the two tappets through the flats created.
In den Tassenstößeln kann in an sich bekannter Weise jeweils ein hydraulisches Ventilspielausgleichselement angeordnet sein, welches sich mit seiner Oberseite an dem darüber liegenden Bolzen abstützt.In the cup tappets can each in a manner known per se a hydraulic valve lash adjuster arranged be, which is with its top on the supports the bolt above it.
Da die Tassenstößel wie üblich in Stößelführungen des Zylinderblockes geführt sind, kann auf einfache Weise über eine Querbohrung von einer Hauptölleitung aus den Ventilausgleichselementen Öl vom Motorölkreislauf zugeführt werden. Da die Tassenstößel durch den Bolzen am Drehen gehindert sind, bedarf es am Umfang der Tassenstößel keiner Ringnut; die Ölkanäle stehen sich auch so bei jedem Ventilhub gegenüber. Da der Bolzen direkt mit dem Ventilausgleichselement in Berührung steht, hat der Tassenstößel selbst keine Ventilbetätigungskräfte zu übertragen, sondern nur Führungsfunktionen. Er kann somit aus einem leichten Material wie z. B. Leichtmetall oder aber auch aus warmfestem Kunststoff gefertigt sein.As usual, the tappets in the tappet guides of the cylinder block can be done easily a cross hole from a main oil line from the valve balancing elements Oil supplied from the engine oil circuit will. Because the tappets by turning the bolt are hindered, there is no need for the circumference of the tappets Ring groove; the oil channels stand in this way for everyone Valve stroke opposite. Because the bolt is directly with the valve balancing element is in contact, the tappet has not to transmit valve actuation forces itself, but only management functions. So he can a light material such as B. light metal or also be made of heat-resistant plastic.
Besonders vorteilhaft ist eine Ausführung aus einem Material mit gleicher Wärmedehnung wie das Material des Zylinderkopfes, da dadurch keine Veränderung des Lagerspiels bei Temperaturveränderungen eintritt.An embodiment made of one material is particularly advantageous with the same thermal expansion as the material of the cylinder head, since this does not change the bearing clearance occurs with temperature changes.
Der Bolzen ist vorteilhafterweise im Bereich der Anlage der Ventilspielausgleichselemente abgeflacht.The bolt is advantageously in the area of the system the valve lash adjusters flattened.
Damit wird auf einfache Art zwischen den Ventilspielausgleichselementen und dem Bolzen eine Flächenberührung erreicht.This is a simple way between the valve clearance compensation elements and the bolt reaches a surface contact.
Der Bolzen ist vorzugsweise in den Tassenstößeln schwimmend gelagert.The bolt is preferably floating in the tappets stored.
Dadurch nimmt die Lagerung des Bolzens die Toleranzen sowie eventuelle Wärmedehnungen im Abstand zwischen den beiden Tassenstößeln der gemeinsam betätigten Gaswechselventile auf.As a result, the bearing of the bolt takes the tolerances as well possible thermal expansion in the distance between the two tappets of the jointly operated gas exchange valves on.
In einer weiteren Ausführungsform der Erfindung ist der Bolzen lediglich in Sackbohrungen der Tassenstößel schwimmend gelagert, ohne über die Ventilspielausgleichselemente zu greifen.In a further embodiment of the invention, the Bolts only in the blind holes in the tappets floating, without the valve lash adjusters to grab.
Das ermöglicht, bei vorgegebenen Abmessungen den Bolzen gegenüber dem Steuernocken tiefer als bei einer Anordnung oberhalb der Ventilausgleichselemente anzubringen.This enables the bolt to be used for given dimensions compared to the control cam lower than with an arrangement to be installed above the valve compensation elements.
Ausführungsbeispiele der Erfindung sind nachstehend anhand von Zeichnungen näher beschrieben. Es zeigen
- Fig. 1:
- einen Schnitt durch eine erfindungsgemäße Einrichtung;
- Fig. 2:
- einen Teilschnitt entlang der Linie A in Fig. 1;
- Fig. 3:
- einen Schnitt durch eine weitere erfindungsgemäße Einrichtung;
- Fig. 4:
- einen Teilschnitt entlang der Linie A in Fig. 3;
- Fig. 5:
- eine Ansicht in Richtung X auf die Tassenstößel und die Rolle nach Fig. 1 und Fig. 3;
- Fig. 6:
- eine Ansicht in Richtung Y auf die Tassenstößel und die Rolle nach Fig. 5;
- Fig. 7:
- einen Schnitt entlang der Linie C der Fig. 6;
- Fig. 8:
- einen Teilschnitt entlang der Linie B in Fig. 1.
- Fig. 1:
- a section through an inventive device;
- Fig. 2:
- a partial section along the line A in Fig. 1;
- Fig. 3:
- a section through a further device according to the invention;
- Fig. 4:
- a partial section along the line A in Fig. 3;
- Fig. 5:
- a view in the direction X of the tappet and the roller of Fig. 1 and Fig. 3;
- Fig. 6:
- a view in direction Y of the tappet and the roller of FIG. 5;
- Fig. 7:
- a section along the line C of Fig. 6;
- Fig. 8:
- a partial section along the line B in Fig. 1st
Ein erstes Ausführungsbeispiel ist mit den Fig. 1 und 2
sowie 5 bis 8 dargestellt. Im Zylinderkopf 1 einer Brennkraftmaschine
sind zwei Gaswechselventile 2, 3 einer gemeinsam
betätigten Ventilgruppe in üblicher Weise mittels
Ventilführungsbüchsen 4, 5 geführt und durch Ventilfedern
6, 7 in ihrer Schließstellung auf Ventilsitzen 8, 9 gehalten.
Jedem Gaswechselventil 2, 3 ist ein Tassenstößel
10, 11 zugeordnet, der in einer Stößelführung 12, 13 des
Zylinderkopfes 1 gleitend geführt ist.A first exemplary embodiment is shown in FIGS. 1 and 2
and 5 to 8. In the
Die Tassenstößel 10, 11 sind an den zueinander weisenden
Seiten mit Abflachungen 14, 15 versehen. Zwischen den
Tassenstößeln 10, 11 sind die Stößelführungen 12, 13
durch einen parallel mit den Achsen der Gaswechselventile
2, 3 verlaufenden Schacht 16 verbunden. Zwischen den Abflachungen
14, 15 der Tassenstößeln 10, 11 verläuft - den
Schacht 16 überbrückend - ein Bolzen 17, der in den Tassenstößeln
10, 11 schwimmend gelagert ist. Auf dem Bolzen
17 ist, die Breite des Schachtes 16 einnehmend, eine
Rolle 18 gelagert. Auf die Rolle 18 wirkt ein Steuernocken
19 einer im Zylinderkopf 1 gelagerten Nockenwelle
20 ein. In den Tassenstößeln 10, 11 befinden sich hydraulische
Ventilspielausgleichselemente 21, 22, die sich mit
einer Seite auf der Stirnseite des zugehörenden Ventilschaftes
23, 24 abstützen. Die andere Seite der Ventilspielausgleichselemente
21, 22 stützt sich an jeweils
einer Abflachung 25, 26 des Bolzens 17 ab, der sich somit
über die Ventilspielausgleichselemente 21, 22 erstreckt.The
Von einer Ölhauptleitung 27 ausgehende Ölbohrungen 28 im
Zylinderkopf 1 führen zu den Stößelführungen 12, 13. Von
dort leiten Ölbohrungen 29 im Tassenstößel 10, 11 das Öl
in üblicher Weise zu den Ventilspielausgleichselementen
21, 22.From an oil
Da der Steuernocken 19 breiter als die Rolle 18 ist, sind
auf der Oberseite der Tassenstößel 10, 11 Aussparungen 32
vorgesehen, welche dem Freigang der umlaufenden Nockenspitze
dienen.Since the
Ein anderes Ausführungsbeispiel ist mit den Fig. 3 und 4
sowie 5 bis 8 dargestellt, bei dem sich die Ventilspielausgleichselemente
21, 22 am Boden 30, 31 der Tassenstößel
10', 11' abstützen. Der Bolzen 17' ist seitlich
neben den Ventilspielausgleichselementen 21, 22 in den
Tassenstößeln 10', 11' schwimmend gelagert.Another embodiment is shown in FIGS. 3 and 4
and 5 to 8 shown, in which the valve
Die Erfindung ermöglicht eine Vielzahl weiterer Ausführungsbeispiele. So kann z. B. auf die seitlichen Abflachungen der Tassenstößel verzichtet werden, wenn der Abstand der beiden gleichzeitig zu betätigenden Gaswechselventile ausreichend groß ist, um auch dann zwischen den Tassenstößeln den Schacht für den Freigang der Rolle anordnen zu können.The invention enables a large number of further exemplary embodiments. So z. B. on the side flats the tappet can be dispensed with if the Distance between the two gas exchange valves to be operated simultaneously is sufficiently large to be between the tappets the shaft for the role of the role to be able to order.
Insbesondere bei einer Ausführung nach Fig. 1 können die
Tassenstößel 10, 11 aus einem leichten weniger festen
Werkstoff wie z. B. einer Leichtmetallegierung oder einem
warmfesten Kunststoff gefertigt sein, da sie hier lediglich
Führungsaufgaben für die Ventilspielausgleichselemente
21, 22 zu übernehmen haben. Die Ventilbetätigungskräfte
dagegen werden vom Steuernocken 19 über die Rolle
18, den Bolzen 17 und die Ventilspielausgleichselemente
21, 22 direkt auf die Ventilschäfte 23, 24 übertragen.In particular in an embodiment according to FIG. 1, the
Die besonderen Vorteile der Erfindung sind darin zu sehen, daß neben der besonders niedrigen Reibleistung des Ventiltriebes infolge der mit dem Steuernocken in Wirkverbindung stehenden Rolle und der im übrigen linear geführten Teile nur sehr geringe Massen bewegt werden, da nur eine Rolle für zwei Ventile erforderlich ist und die Tassenstößel als Linearführungsteile gegenüber üblichen Tassenstößeln besonders leicht ausgeführt werden können. Der Raumbedarf im Zylinderkopf ist gering, da neben den Tassenstößeln keine zusätzlichen Führungselemente für eine Brücke o. dgl. erforderlich sind.The particular advantages of the invention can be seen in that in addition to the particularly low friction of the Valve drive as a result of the operative connection with the control cam standing role and the other linearly guided Parts only very small masses are moved because only one roller is required for two valves and the Cup tappets as linear guide parts compared to conventional ones Cup tappets can be carried out particularly easily. The space requirement in the cylinder head is small because in addition to the Cup tappets no additional guide elements for a bridge or the like are required.
Die konstruktiven Veränderungen am Zylinderkopf sind gegenüber einer üblichen Ventilbetätigung über Tassenstößel gering, da lediglich der Schacht für den Freigang der Rolle zwischen den Stößelführungen hergestellt werden muß.The design changes to the cylinder head are opposite a usual valve actuation via bucket tappets low, since only the shaft for the access of the Roll between the ram guides are made got to.
Claims (6)
- Device for simultaneously operating two gas exchange valves of an internal combustion engine with only one control cam acting on a roller, characterised in that associated with each of the two gas exchange valves (2, 3) coaxially is a cup tappet (10, 11), whose tappet guides (12, 13) on their sides facing each other are connected by a gas shaft (16) running parallel to the direction of valve operation, the cup tappets (10, 11) are connected by a pin (17) bridging the shaft (16), and on the pin (17) is mounted the roller (18) which is operatively connected to the control cam (19).
- Device according to claim 1, characterised in that the cup tappets (10, 11) comprise a flattened region (14, 15) in each case on the side facing the shaft (16).
- Device according to claim 1 or 2, characterised in that in the cup tappets (10, 11) is arranged in each case a hydraulic valve play compensating element (21, 22) which is supported by its upper side on the pin (17) extending over this upper side.
- Device according to claim 3, characterised in that the pin (17) is provided with flattened regions (25, 26) in the region of contact of the valve play compensating elements (21, 22).
- Device according to claim 1 or 2, characterised in that the pin (17') is mounted in lateral bores of the cup tappets (10', 11').
- Device according to claims 1 to 5, characterised in that the pin (17, 17') is mounted in floating relationship in the cup tappets (10, 11; 10', 11').
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4415270 | 1994-04-30 | ||
| DE4415270A DE4415270A1 (en) | 1994-04-30 | 1994-04-30 | Device for the simultaneous actuation of two gas exchange valves of an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0679798A1 EP0679798A1 (en) | 1995-11-02 |
| EP0679798B1 true EP0679798B1 (en) | 1998-03-04 |
Family
ID=6516963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95105779A Expired - Lifetime EP0679798B1 (en) | 1994-04-30 | 1995-04-18 | Arrangement for simultaneously driving two valves in an internal combustion engine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0679798B1 (en) |
| AT (1) | ATE163732T1 (en) |
| DE (2) | DE4415270A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19603915A1 (en) * | 1996-02-03 | 1997-08-07 | Schaeffler Waelzlager Kg | Tappet for a valve train of an internal combustion engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4023886A1 (en) * | 1990-07-27 | 1992-01-30 | Bayerische Motoren Werke Ag | ROLLER TOWEL WITH A HYDRAULIC COMPENSATING ELEMENT |
| DE4039075C2 (en) * | 1990-10-01 | 2001-11-29 | Volkswagen Ag | Valve train for at least two simultaneously operated lift valves |
| DE4039256C2 (en) * | 1990-12-08 | 1996-05-09 | Schaeffler Waelzlager Kg | Device for the simultaneous actuation of two gas exchange valves of an internal combustion engine |
| DE4226760A1 (en) * | 1992-08-13 | 1994-02-17 | Opel Adam Ag | Valve train for at least two simultaneously operated lift valves |
| DE4323518A1 (en) * | 1992-08-21 | 1994-02-24 | Bayerische Motoren Werke Ag | Tappet for operating combustion engine lift valve - has profiled body with control features placed at different levels and has take-up sections lying opposite each other in upper edge of housing |
| DE9316125U1 (en) * | 1993-10-22 | 1993-12-16 | Schaeffler Waelzlager Kg | Device for the simultaneous actuation of two gas exchange valves of an internal combustion engine |
-
1994
- 1994-04-30 DE DE4415270A patent/DE4415270A1/en not_active Withdrawn
-
1995
- 1995-04-18 EP EP95105779A patent/EP0679798B1/en not_active Expired - Lifetime
- 1995-04-18 AT AT95105779T patent/ATE163732T1/en not_active IP Right Cessation
- 1995-04-18 DE DE59501520T patent/DE59501520D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0679798A1 (en) | 1995-11-02 |
| ATE163732T1 (en) | 1998-03-15 |
| DE4415270A1 (en) | 1995-11-02 |
| DE59501520D1 (en) | 1998-04-09 |
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