EP0872630A2 - Lagerung eines Schlepphebels einer Ventilsteuereinrichtung an einer Brennkraftmaschine - Google Patents
Lagerung eines Schlepphebels einer Ventilsteuereinrichtung an einer Brennkraftmaschine Download PDFInfo
- Publication number
- EP0872630A2 EP0872630A2 EP98105314A EP98105314A EP0872630A2 EP 0872630 A2 EP0872630 A2 EP 0872630A2 EP 98105314 A EP98105314 A EP 98105314A EP 98105314 A EP98105314 A EP 98105314A EP 0872630 A2 EP0872630 A2 EP 0872630A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- rocker arm
- cylinder head
- support surface
- operating position
- bearing according
- 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
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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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/185—Overhead end-pivot rocking arms
Definitions
- the invention relates to a bearing of a rocker arm of a valve control device an internal combustion engine according to the preamble of claim 1.
- the holding component here consists on the one hand of a connecting clip between the valve stem end and the second rocker arm end, creating a is made movable connection, the rocker arm against shifting and lateral tilting secures.
- Another holding component is a rocker arm from above used cam on the camshaft, which is the first rocker arm end secures against lifting off the ball contact surface.
- a rocker arm rests with one end on an end ball of a push rod which is actuated by a camshaft located below.
- the other rocker arm end is connected to a valve stem end.
- the rocker arm is designed as a semi-cylindrical saddle. This saddle, in conjunction with a corresponding counter surface on a cylinder head cover, represents the pivot bearing of the rocker arm.
- rocker arms of a valve actuation device In another known arrangement of rocker arms of a valve actuation device (DE 196 22 872 A1), the rocker arms are lined up with bearing eyes on a common axis. Spacers are provided here as assembly aids between the rocker arms, which are mounted on the axle so that they are difficult to turn. The rocker arms are raised to a desired position during assembly with the help of protruding web extensions. Since the rocker arms are attached to an axle here, they cannot tip over or fall off, so that this problem does not occur here and the assembly aid mentioned here is only used to lift the rocker arms in accordance with the assembly.
- rocker arms of a valve actuation device are two rocker arms with bearing eyes plugged onto a common axis.
- the rocker arms engage in their operating position in slots in the cylinder head, where they are kept movable and in a certain axial distance are defined on the axis. Because the rocker arms open here from the start a common axis are plugged in, the problem of tipping and occurs Do not fall off during assembly.
- the slots formed in the cylinder head serve here the spacing, so that the rocker arm is operational with its side walls rest against the slotted side walls and be supported.
- the diaphragm walls are used as storage areas can be processed precisely with small distance and directional tolerances.
- the object of the invention is the generic storage of a To further develop the rocker arm of a valve control device on an internal combustion engine, that a rocker arm is prevented from tipping over and falling off during assembly. This object is achieved with the feature of claim 1.
- claim 1 is as an assembly aid in the area of at least one side of the rocker arm at a short distance from the rocker arm position in the operating position attached at least one contact element.
- a holding component for precise alignment and fixing of the rocker arm in a predetermined one Operating position is used in particular a cam placed on the rocker arm the camshaft and / or a connecting part between the second rocker arm end and the valve stem end.
- a cam placed on the rocker arm the camshaft and / or a connecting part between the second rocker arm end and the valve stem end.
- For the assembly of these holding components is only a small one Inclined tilted position of the rocker arm well suited, for example placing the camshaft and the associated cam the rocker arm in his Operating position tilts back and aligns.
- the rocker arm lifts from the one or the System elements again.
- the system elements are used here exclusively as Installation aid and have no contact points in the operating position of the rocker arm.
- the assembly aid according to the invention is particularly in connection with roller rocker arms advantageous, since this is regularly assigned to an assigned without a fixed connection Valve stem end rest and here the risk of tipping and falling during the Assembly is particularly large.
- System elements as an assembly aid can already be present in the cylinder head structure and required investment walls and investment points. Such system elements are in particular specially cast on and / or inserted and fastened separately. Essential here is that these contact elements with their contact points and / or contact surfaces in one short distance from the rocker arm in its aligned operating position, so that this is only slightly inclined in its open position during assembly can tip over without falling off.
- contact elements with vertical are preferred Contact surfaces on both sides of the rocker arm in the area of the ball support surface arranged on the cylinder head.
- a contact element for example, as a cast-on contact rib in the area of Rocker arm end to be arranged. This can have a horizontal contact surface, over which the rocker arm end or corresponding extensions are guided at a distance are and which only allows a tilting into a slight inclined position.
- At least some of the contact elements are as Cylinder head molded system lugs formed laterally and approximately parallel to the Rocker arms run.
- the contact surfaces and / or contact points of the contact surfaces are to be reworked there, where the casting accuracy is not sufficient.
- the ball pin with the ball support surface is one Height-adjustable control element of a hydraulic control element used in the cylinder head.
- rocker arm 8 with a corresponding concave spherical counter surface 9 put on a rocker arm end.
- the other rocker arm end protrudes in Fig. 2 from the Out the drawing area and is connected to a valve stem end (not shown).
- camshaft bearing shells 10 1 and 3 parts of camshaft bearing shells 10 are shown, on which a (not shown) camshaft is mounted and rests with its cams in the fully assembled operating position for actuating the rocker arm 8 thereon.
- the rocker arm arrangement shown in FIG. 2 above the bore 5 is also correspondingly provided for a further rocker arm in the region of the bore 4.
- this rocker arm (8) is designed in the manner of a roller rocker arm with a roller between the two rocker arm ends, the roller being in contact with a cam.
- the rocker arm 8 has a U-shape with a substantially middle, saddle-shaped area as a spherical counter surface 9.
- the rocker arm 8 is in Fig. 2 with solid lines in its vertically aligned along the axis 10 Operating position shown. Opposite this operating position are on both sides the rocker arm 8 with small intervals 11, 12 arranged system elements, the right contact element as an existing cylinder head wall 13 and the left contact element is designed as a system nose 14.
- Fig. 3 it can be seen that the plant nose 14 starting from a lateral cylinder head wall 13 approximately with a horizontal direction is cast on.
- 14 horizontal ribs are between several system lugs 16 cast on.
- Such a horizontal abutment rib can also be used to prevent tipping Rocker arms are used in such a way that they are in the aligned operating position so over the abutment rib 16 is that no unlimited side or rear Tilting the rocker arm 8 is possible.
- 3 is the position of the control element 6 of the hydraulic element with the ball support surface 7 shown in dashed lines and one Oil supply line 17 for the hydraulic elements.
- rocker arm 8 When installing the rocker arm 8, they are in the cylinder head on their ends Contact surfaces, in particular the ball support surfaces 7 placed.
- the Rocker arm 8 before installing the camshaft and before fitting the cams tilt the vertically aligned position, as indicated by the axis 18.
- a rocker arm 8 tilted to the right is shown in broken lines in FIG. 2.
- Of the Rocker arm 8 lies laterally on the correspondingly arranged cylinder head wall 13 so that it cannot fall off. If you tilt to the left, the The rocker arm 8 abut against the system nose 14 accordingly and without simply falling off be held in a slightly tilted inclined position.
- Such a slant is for that Fit a cam of a camshaft suitable, which then the rocker arm 8 in its untilted operating position is aligned.
- the system walls are used here as Installation aid and are in the operating position with the distances 11, 12 from the rocker arm 8 removed without further function.
Abstract
Description
In einer anderen bekannten Anordnung von Schlepphebeln einer Ventilbetätigungsvorrichtung (DE 196 22 872 A1) sind die Schlepphebel mit Lageraugen auf eine gemeinsame Achse aufgereiht. Hier sind als Montagehilfe Abstandshalter zwischen den Schlepphebeln vorgesehen, die auf der Achse schwergängig drehbar gelagert sind. Mit Hilfe von überstehenden Stegansätzen werden die Schlepphebel bei der Montage in eine gewünschte Position angehoben. Da hier die Schlepphebel auf eine Achse aufgesteckt sind, können sie nicht abkippen oder abfallen, so daß dieses Problem hier nicht auftritt und die hier erwähnte Montagehilfe lediglich zu einem montagegerechten Anheben der Schlepphebel dient.
- Fig. 1
- eine Draufsicht auf einen Teil eines Zylinderkopfs,
- Fig. 2
- eine Schnittdarstellung des Zylinderkopfs entlang der Linie A-A aus Fig. 1 mit einem eingezeichneten Schlepphebel, und
- Fig. 3
- eine Schnittdarstellung entlang der Linie B-B aus Fig. 2.
Insbesondere ist dieser Schlepphebel (8) in der Art eines Rollenschlepphebels mit einer Rolle zwischen den beiden Schlepphebelenden ausgebildet, wobei die Rolle in Kontakt mit einem Nocken steht.
Claims (8)
- Lagerung eines Schlepphebels (8) einer Ventilsteuereinrichtung an einer Brennkraftmaschine, wobeider Schlepphebel (8) durch eine an einem Zylinderkopf (1) gelagerte Nockenwelle betätigbar ist, dergestalt,daß der Schlepphebel (8) mit einem ersten Schlepphebelende auf einer Kugelabstützfläche (7) mit einer entsprechend geformten Gegenfläche (9) schwenkbar aufliegt und abgestützt ist, unddaß der Schlepphebel (8) mit dem anderen zweiten Schlepphebelende auf einem Ventilschaftende des zugeordneten Ventils aufliegt und der Schlepphebel (8) durch weitere Haltebauteile in einer vorbestimmten Betriebsstellung gehalten ist,
dadurch gekennzeichnet,daß als Montagehilfe im Bereich wenigstens einer Seite des Schlepphebels (8) mit geringem Abstand (11, 12) gegenüber seiner Betriebsstellung wenigstens ein Anlageelement (13, 14, 16) angebracht ist, so daß vor der Anbringung des Haltebauteils ein auf der Kugelabstützfläche aufliegender Schlepphebel (8) nur begrenzt bis zur Anlage am Anlageelement (13, 14, 16) abkippen kann und so in einer geeigneten Position zur Anbringung und zur Ausrichtung durch die weiteren Haltebauteile abgestützt ist. - Lagerung nach Anspruch 1, dadurch gekennzeichnet, daß das oder die Anlageelemente (13, 14, 16) am Zylinderkopf (1) angegossen und/oder separat eingesetzt sind.
- Lagerung nach Anspruch 2, dadurch gekennzeichnet, daß bei angegossenen Anlageelementen (13, 14, 16) die Anlageflächen nachbearbeitet sind.
- Lagerung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Anlageelemente (13, 14, 16) mit geringem Abstand (11, 12) zu beiden Seiten des Schlepphebels (8) und/oder mit geringem Abstand zum Schlepphebelende im Bereich der Kugelabstützfläche (7) am Zylinderkopf (1) angeordnet sind.
- Lagerung nach Anspruch 4, dadurch gekennzeichnet, daß die seitlichen Anlageelemente etwa parallel zu einem Schlepphebel (8) verlaufende, angegossene Anlagenasen (14) sind.
- Lagerung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Kugelabstützfläche (7) auf einem Kugelzapfen als Stellelement (6) eines in den Zylinderkopf (1) eingesetzten Hydraulikstellelements ist.
- Lagerung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Haltebauteil ein auf den Schlepphebel (8) aufgesetzter Nocken der Nockenwelle und/oder ein Verbindungsteil zwischen dem zweiten Schlepphebelende und dem Ventilschaftende ist.
- Lagerung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Schlepphebel (8) ein Rollenschlepphebel ist, bei dem eine zwischen den beiden Schlepphebelenden angeordnete Rolle an der Nockenwelle anliegt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19716273 | 1997-04-18 | ||
DE19716273 | 1997-04-18 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0872630A2 true EP0872630A2 (de) | 1998-10-21 |
EP0872630A3 EP0872630A3 (de) | 1999-01-20 |
EP0872630B1 EP0872630B1 (de) | 2001-06-20 |
Family
ID=7826928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98105314A Expired - Lifetime EP0872630B1 (de) | 1997-04-18 | 1998-03-24 | Lagerung eines Schlepphebels einer Ventilsteuereinrichtung an einer Brennkraftmaschine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0872630B1 (de) |
DE (1) | DE59800879D1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010005825A1 (de) * | 2010-01-27 | 2011-07-28 | GM Global Technology Operations LLC, ( n. d. Ges. d. Staates Delaware ), Mich. | Sicherungsvorrichtung zur Montage eines Schlepphebels |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1919993A1 (de) | 1969-04-19 | 1970-11-05 | Volkswagenwerk Ag | Halter fuer Schwinghebel von Ventilsteuerungen |
DE2008944A1 (de) | 1970-02-26 | 1971-09-02 | Volkswagenwerk Ag, 3180 Wolfsburg | Sicherung fur Schwinghebel von Ven tilsteuerungen, insbesondere fur Brenn kraftmaschinen |
EP0287554A2 (de) | 1987-04-13 | 1988-10-19 | AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List | Ventilantrieb einer Brennkraftmaschine |
DE3843983A1 (de) | 1988-12-27 | 1990-06-28 | Kloeckner Humboldt Deutz Ag | Viertakt-brennkraftmaschine |
DE19622872A1 (de) | 1996-06-07 | 1996-11-07 | Audi Ag | Anordnung zur Halterung von Schlepphebeln einer Ventilbetätigungsvorrichtung |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1201214A (en) * | 1968-02-01 | 1970-08-05 | Ford Motor Co | Overhead camshaft internal combustion engine |
JPH059444Y2 (de) * | 1986-07-11 | 1993-03-09 |
-
1998
- 1998-03-24 EP EP98105314A patent/EP0872630B1/de not_active Expired - Lifetime
- 1998-03-24 DE DE59800879T patent/DE59800879D1/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1919993A1 (de) | 1969-04-19 | 1970-11-05 | Volkswagenwerk Ag | Halter fuer Schwinghebel von Ventilsteuerungen |
DE2008944A1 (de) | 1970-02-26 | 1971-09-02 | Volkswagenwerk Ag, 3180 Wolfsburg | Sicherung fur Schwinghebel von Ven tilsteuerungen, insbesondere fur Brenn kraftmaschinen |
EP0287554A2 (de) | 1987-04-13 | 1988-10-19 | AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List | Ventilantrieb einer Brennkraftmaschine |
DE3843983A1 (de) | 1988-12-27 | 1990-06-28 | Kloeckner Humboldt Deutz Ag | Viertakt-brennkraftmaschine |
DE19622872A1 (de) | 1996-06-07 | 1996-11-07 | Audi Ag | Anordnung zur Halterung von Schlepphebeln einer Ventilbetätigungsvorrichtung |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010005825A1 (de) * | 2010-01-27 | 2011-07-28 | GM Global Technology Operations LLC, ( n. d. Ges. d. Staates Delaware ), Mich. | Sicherungsvorrichtung zur Montage eines Schlepphebels |
GB2477388A (en) * | 2010-01-27 | 2011-08-03 | Gm Global Tech Operations Inc | Securing device for installing a rocker arm |
GB2477388B (en) * | 2010-01-27 | 2015-02-18 | Gm Global Tech Operations Inc | Installing a rocker arm |
Also Published As
Publication number | Publication date |
---|---|
EP0872630A3 (de) | 1999-01-20 |
EP0872630B1 (de) | 2001-06-20 |
DE59800879D1 (de) | 2001-07-26 |
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