EP0907008B1 - Cylinder head with valve gear for an internal combustion engine - Google Patents

Cylinder head with valve gear for an internal combustion engine Download PDF

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Publication number
EP0907008B1
EP0907008B1 EP98115431A EP98115431A EP0907008B1 EP 0907008 B1 EP0907008 B1 EP 0907008B1 EP 98115431 A EP98115431 A EP 98115431A EP 98115431 A EP98115431 A EP 98115431A EP 0907008 B1 EP0907008 B1 EP 0907008B1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
projection
valve
rocker arm
drag lever
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
Application number
EP98115431A
Other languages
German (de)
French (fr)
Other versions
EP0907008A1 (en
Inventor
Reinhard Ratzberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0907008A1 publication Critical patent/EP0907008A1/en
Application granted granted Critical
Publication of EP0907008B1 publication Critical patent/EP0907008B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 preamble of claim 1
  • Cylinder head with valve control for an internal combustion engine with a rocker arm form-fitting at one end on a ball pin arranged in the cylinder head is movably mounted and at the other via a between straight stop bars with play engaging shaft end of a gas exchange valve on the Valve stem is positively secured, and the connection of both rocker arm ends has essentially parallel side cheeks in the central area, being spaced with play in the transverse direction of the rocker arm to its side cheeks Arranged projections are provided on parts of the cylinder head.
  • Such a rocker arm for a in a cylinder head of an internal combustion engine arranged valve control is known for example from US-A 4 791 893.
  • This known rocker arm is for the simultaneous actuation of two valves two arms, which makes the rocker arm especially at high Engine speeds and / or uneven valve closing movements are encouraged to jump or tilt, which is disadvantageous for the valve train can.
  • To secure this position it is designed without a positioning spring device
  • the projections arranged with play on both sides serve as rocker arms on the cylinder head.
  • the invention is based, for a generic rocker arm the task for installation in the cylinder head without separate rocker arm devices to demonstrate the simple and safe assembly of the rocker arm enable.
  • one projection on a camshaft bearing bracket and the other Projection is arranged on a collar of the cylinder head and for longitudinal positioning serving third projection on the inside on a cylinder head boundary is arranged.
  • projections are advantageously in one piece with that formed in the casting Cylinder head connected, if necessary, can be used for transverse positioning diametrically opposite projections can be machined.
  • a cylinder head 1, shown only in sections, for one not shown Internal combustion engine is equipped with a valve control 2, which preferably one designed as a roller lever rocker arm 3.
  • the rocker arm 3 is one end, for example, on a ball pin 4 arranged in the cylinder head 1 of a hydraulic valve clearance compensation element 5 is positively movable stored.
  • the rocker arm 3 is via a between straight stop bars 6 engaging shaft end 7 of a gas exchange valve 8 at its end Valve stem 9 guided positively secured.
  • the connection between the two points further Ends of the rocker arm 3 in the central region substantially parallel side cheeks 10 on.
  • the projections 11, 11 ' are relative small game to the side cheeks 10 of the rocker arm 3 and arranged with relatively wide stop surfaces 18 formed.
  • the invention enables simple assembly of the rocker arm 3 without auxiliary tools, whereby a functionally correct assembly of the rocker arm is achieved and further spring or guide elements are omitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Description

Die Erfindung bezieht sich nach dem Oberbegriff des Patentanspruches 1 auf einen Zylinderkopf mit Ventilsteuerung für eine Brennkraftmaschine, wobei ein Schlepphebel einenends auf einem im Zylinderkopf angeordneten Kugelzapfen formschlüssig beweglich gelagert ist und andernends über ein zwischen geraden Anschlagleisten mit Spiel eingreifendes Schaftende eines Gaswechselventils an dessen Ventilschaft formschlüssig gesichert geführt ist, und die Verbindung beider Schlepphebelenden im mittigen Bereich im wesentlichen parallele Seitenwangen aufweist, wobei in Querrichtung des Schlepphebels zu dessen Seitenwangen mit Spiel beabstandet angeordnete Vorsprünge an Teilen des Zylinderkopfes vorgesehen sind.The invention relates to a preamble of claim 1 Cylinder head with valve control for an internal combustion engine, with a rocker arm form-fitting at one end on a ball pin arranged in the cylinder head is movably mounted and at the other via a between straight stop bars with play engaging shaft end of a gas exchange valve on the Valve stem is positively secured, and the connection of both rocker arm ends has essentially parallel side cheeks in the central area, being spaced with play in the transverse direction of the rocker arm to its side cheeks Arranged projections are provided on parts of the cylinder head.

Ein derartiger Schlepphebel für eine in einem Zylinderkopf einer Brennkraftmaschine angeordnete Ventilsteuerung ist beispielsweise aus der US-A 4 791 893 bekannt. Dieser bekannte Schlepphebel ist zur gleichzeitigen Betätigung zweier Ventile zweiarmig ausgebildet, wodurch der Schlepphebel insbesondere bei hohen Drehzahlen der Brennkraftmaschine und/oder ungleichen Ventilschließbewegungen zu einem für den Ventiltrieb nachteiligen Springen oder Kippen angeregt werden kann. Zur Lagesicherung dieses ohne eine positionierende Federvorrichtung ausgebildeten Schlepphebels dienen die beiderseits mit Spiel angeordneten Vorsprünge am Zylinderkopf. Such a rocker arm for a in a cylinder head of an internal combustion engine arranged valve control is known for example from US-A 4 791 893. This known rocker arm is for the simultaneous actuation of two valves two arms, which makes the rocker arm especially at high Engine speeds and / or uneven valve closing movements are encouraged to jump or tilt, which is disadvantageous for the valve train can. To secure this position, it is designed without a positioning spring device The projections arranged with play on both sides serve as rocker arms on the cylinder head.

Der Erfindung liegt die Aufgabe zugrunde, für einen gattungsgemäßen Schlepphebel zur Montage im Zylinderkopf ohne gesonderte Schlepphebel-Führung Einrichtungen aufzuzeigen, die eine einfache und sichere Montage des Schlepphebels ermöglichen.The invention is based, for a generic rocker arm the task for installation in the cylinder head without separate rocker arm devices to demonstrate the simple and safe assembly of the rocker arm enable.

Diese Aufgabe ist mit dem Patentanspruch 1 dadurch gelöst, daß für eine werkzeugfreie Positionierung des Schlepphebels auf Kugelzapfen und Ventilschaft in Längsrichtung des Schlepphebels eine dessen ventilschaftseitige Anschlagleisten verbindende Montage-Stopprippe dient zusammen mit einem dem Kugelzapfen benachbarten weiteren Vorsprung im/am Zylinderkopf.This object is achieved with claim 1 in that for a tool-free Positioning the rocker arm on ball stud and valve stem in In the longitudinal direction of the rocker arm one of the valve stem side stop strips connecting assembly stop rib serves together with one adjacent to the ball stud another head start in / on the cylinder head.

Mit der erfindungsgemäßen Ausgestaltung des Zylinderkopfes ist eine sichere und werkzeugfreie Anordnung des Schlepphebels auf Kugelzapfen und Ventilschaft sichergestellt, wobei die hierfür vorgeschlagenen Einrichtungen im Betrieb des Schlepphebels vorteilhafterweise frei von einer reibbelastenden Verbindung sind.With the inventive design of the cylinder head is a safe and Tool-free arrangement of the rocker arm on ball stud and valve stem ensured the proposed facilities in the operation of the Rocker arms are advantageously free of a frictional connection.

In Ausgestaltung der Erfindung wird vorgeschlagen, daß von den zur Querpositionierung den Seitenwangen des Schlepphebels zugeordneten, diametral plazierten Vorsprüngen ein Vorsprung an einem Nockenwellen-Lagerstuhl und der andere Vorsprung an einem Kragen des Zylinderkopfes angeordnet ist und der zur Längspositionierung dienende dritte Vorsprung innenseitig an einer Zylinderkopf-Begrenzung angeordnet ist.In an embodiment of the invention it is proposed that of the transverse positioning the diametrically placed side cheeks of the rocker arm Projections one projection on a camshaft bearing bracket and the other Projection is arranged on a collar of the cylinder head and for longitudinal positioning serving third projection on the inside on a cylinder head boundary is arranged.

Diese Vorsprünge sind vorteilhafterweise einstückig mit dem im Guss ausgebildeten Zylinderkopf verbunden, gegebenenfalls können die für die Querpositionierung diametral gegenüberliegenden Vorsprünge bearbeitet sein.These projections are advantageously in one piece with that formed in the casting Cylinder head connected, if necessary, can be used for transverse positioning diametrically opposite projections can be machined.

Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispiels beschrieben. Es zeigt

Figur 1
einen abschnittsweisen Querschnitt eines Zylinderkopfes mit einer einen Schlepphebel umfassenden Ventilsteuerung,
Figur 2
den Schlepphebel in Draufsicht des Zylinderkopfes mit den erfindungsgemäß zylinderkopfseitig angeordneten Vorsprüngen zur Montageerleichterung.
The invention is described with reference to an embodiment shown in the drawing. It shows
Figure 1
1 shows a sectional cross section of a cylinder head with a valve control comprising a rocker arm,
Figure 2
the rocker arm in plan view of the cylinder head with the projections arranged on the cylinder head side according to the invention to facilitate assembly.

Ein lediglich abschnittsweise dargestellter Zylinderkopf 1 für eine nicht gezeigte Brennkraftmaschine ist mit einer Ventilsteuerung 2 ausgerüstet, die einen vorzugsweise als Rollenhebel gestalteten Schlepphebel 3 umfaßt. Der Schlepphebel 3 ist einenends auf einem im Zylinderkopf 1 angeordneten Kugelzapfen 4 beispielsweise eines hydraulischen Ventilspielausgleichselementes 5 formschlüssig beweglich gelagert. Andernends ist der Schlepphebel 3 über ein zwischen geraden Anschlagleisten 6 mit Spiel eingreifendes Schaftende 7 eines Gaswechselventils 8 an dessen Ventilschaft 9 formschlüssig gesichert geführt. Weiter weist die Verbindung beider Enden des Schlepphebels 3 im mittigen Bereich im wesentlichen parallele Seitenwangen 10 auf.A cylinder head 1, shown only in sections, for one not shown Internal combustion engine is equipped with a valve control 2, which preferably one designed as a roller lever rocker arm 3. The rocker arm 3 is one end, for example, on a ball pin 4 arranged in the cylinder head 1 of a hydraulic valve clearance compensation element 5 is positively movable stored. On the other hand, the rocker arm 3 is via a between straight stop bars 6 engaging shaft end 7 of a gas exchange valve 8 at its end Valve stem 9 guided positively secured. The connection between the two points further Ends of the rocker arm 3 in the central region substantially parallel side cheeks 10 on.

Zur Erzielung einer werkzeugfreien Positionierung des Schlepphebels 3 auf dem Kugelzapfen 4 und dem Ventilschaft 9 dienen in Querrichtung des Schlepphebels 3 zu dessen Seitenwangen 10 mit Spiel beabstandet angeordnete Vorsprünge 11, 11' an Teilen des Zylinderkopfes 1, wobei zur Positionierung in Längsrichtung des bei der Montage bereits zwischen die Vorsprünge 11, 11' eingebrachten Schlepphebels 3 eine dessen ventilschaftseitige Anschlagleisten 6 verbindende Montage-Stopprippe 12 dient, die mit einem dem Kugelzapfen 4 benachbarten weiteren Vorsprung 13 im/am Zylinderkopf 1 zusammenwirkt.To achieve a tool-free positioning of the rocker arm 3 on the Ball stud 4 and the valve stem 9 serve in the transverse direction of the rocker arm 3 on its side cheeks 10, projections 11, 11 'spaced apart with play on parts of the cylinder head 1, the positioning in the longitudinal direction of the assembly already inserted between the projections 11, 11 'rocker arm 3 a mounting stop rib connecting its stop on the valve stem side 6 12 is used with a further projection adjacent to the ball pin 4 13 cooperates in / on the cylinder head 1.

Wie aus Figur 2 hervorgeht, ist von den zur Querpositionierung beim Einfädeln des Schlepphebels 3 zum Schaftende 7 über die Anschlagleisten 6 zwischen den Vorsprüngen 11 und 11' den Seitenwangen 10 zugeordneten, diametral plazierten Vorsprüngen 11, 11' ein Vorsprung 11 an einem Nockenwellen-Lagerstuhl 14 und der andere Vorsprung 11' an einem Kragen 15 des Zylinderkopfes 1 angeordnet, und der zur Längspositionierung dienende dritte Vorsprung 13 ist innenseitig an einer Zylinderkopf-Begrenzung 16 angeordnet.As can be seen from FIG. 2, of those for transverse positioning when threading the Rocker arm 3 to the shaft end 7 via the stop bars 6 between the projections 11 and 11 'associated with the side walls 10, diametrically placed projections 11, 11 'a projection 11 on a camshaft bearing bracket 14 and another projection 11 'arranged on a collar 15 of the cylinder head 1, and the third projection 13 used for longitudinal positioning is on the inside on one Cylinder head limit 16 arranged.

Um bei der Montage des Schlepphebels 3 zur Einfädelung des Ventilschaftes zwischen den Anschlagleisten 6 nur eine geringe Schiefstellung des Schlepphebels 3 durch den Handhabenden zu ermöglichen, sind die Vorsprünge 11, 11' mit relativ kleinem Spiel zu den Seitenwangen 10 des Schlepphebels 3 angeordnet und mit relativ breiten Anschlagflächen 18 ausgebildet.To between the assembly of the rocker arm 3 for threading the valve stem the stop bars 6 only a slight inclination of the rocker arm 3 by the operator, the projections 11, 11 'are relative small game to the side cheeks 10 of the rocker arm 3 and arranged with relatively wide stop surfaces 18 formed.

Die Erfindung ermöglicht eine einfache Montage des Schlepphebels 3 ohne Hilfswerkzeuge, wobei eine funktionsrichtige Montage des Schlepphebels erzielt ist und ferner zusätzliche Feder- bzw. Führungselemente entfallen.The invention enables simple assembly of the rocker arm 3 without auxiliary tools, whereby a functionally correct assembly of the rocker arm is achieved and further spring or guide elements are omitted.

Claims (2)

  1. A cylinder head with a valve control means for an internal combustion engine,
    wherein a drag lever (3) is mounted at one end so as to be positively movable on a ball pin (4) disposed in the cylinder head, and
    is guided at the other end and positively secured by the end (7) of the shank (9) of a gas change valve (8) engaging with clearance between straight abutment strips (6), and
    the connection between the two ends of the drag lever comprises substantially parallel side cheeks (10) in the middle region, wherein
    in the transverse direction of the drag lever (3), projections (11, 11') spaced apart with clearance relative to the side cheeks (10) are provided on parts of the cylinder head (1),
    characterised in that
    the drag lever (3) is positioned on the ball pin (4) and valve shank (9) without using a tool by means of an installation stop rib (12) connecting the abutment strips (6) at the valve-shank end in the longitudinal direction of the drag lever (3), together with an additional projection (13) adjoining the ball pin (4) in/on the cylinder head (1).
  2. A cylinder head according to claim 1, characterised in that
    out of the diametrically positioned projections (11, 11') associated with the side cheeks (10) for transverse positioning, one projection (11) is disposed on a camshaft bearing block (14) and the other projection (11') is disposed on a collar (15) of the cylinder head (1), and
    for longitudinal positioning, the third projection (13) is disposed on the inside of a cylinder-head boundary (16).
EP98115431A 1997-10-01 1998-08-17 Cylinder head with valve gear for an internal combustion engine Expired - Lifetime EP0907008B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19743488 1997-10-01
DE19743488A DE19743488A1 (en) 1997-10-01 1997-10-01 Cylinder head with valve control for an internal combustion engine

Publications (2)

Publication Number Publication Date
EP0907008A1 EP0907008A1 (en) 1999-04-07
EP0907008B1 true EP0907008B1 (en) 2001-03-14

Family

ID=7844348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98115431A Expired - Lifetime EP0907008B1 (en) 1997-10-01 1998-08-17 Cylinder head with valve gear for an internal combustion engine

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DE (2) DE19743488A1 (en)
ES (1) ES2156016T3 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69921860T2 (en) * 1999-04-26 2005-10-20 Delphi Technologies, Inc., Troy ROLE SCHLEPPHEBEL
DE19953419A1 (en) * 1999-11-06 2001-05-10 Deutz Ag Internal combustion engine with gas reverser valve operates valve by roller lever as force transfer link between valve shaft and camshaft using gray iron for cylinder head and crankcase.
EP1312772B1 (en) * 2001-11-19 2004-08-11 Honda Giken Kogyo Kabushiki Kaisha Internal combustion engine with valve train
DE102006052821A1 (en) * 2006-11-09 2008-05-15 Schaeffler Kg Drag lever for actuating a gas exchange valve of an internal combustion engine
DE102007006695A1 (en) * 2007-02-10 2008-08-21 Schaeffler Kg Drag lever with a molded from sheet metal lever body
US7845316B2 (en) * 2007-07-06 2010-12-07 Brp-Powertrain Gmbh & Co Kg Internal combustion engine cooling system
KR101033320B1 (en) 2008-12-05 2011-05-09 기아자동차주식회사 end pivot type valve train
DE102010005825A1 (en) * 2010-01-27 2011-07-28 GM Global Technology Operations LLC, ( n. d. Ges. d. Staates Delaware ), Mich. Securing device for mounting a drag lever
DE102013102149B4 (en) * 2013-03-05 2024-06-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Rocker arm arrangement
DE102013102150A1 (en) * 2013-03-05 2014-09-25 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Rocker arm arrangement

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3502058A (en) * 1966-02-24 1970-03-24 Earl A Thompson Rocker arm
GB1201214A (en) * 1968-02-01 1970-08-05 Ford Motor Co Overhead camshaft internal combustion engine
JPH059444Y2 (en) * 1986-07-11 1993-03-09
EP0287554A3 (en) * 1987-04-13 1989-03-15 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List Valve drive for an internal-combustion engine
US4979475A (en) * 1990-05-25 1990-12-25 Henley Manufacturing Holding Company, Inc. Rocker arm with rounded channel to engage a valve stem with semi-spherical end
EP0761933A1 (en) * 1995-09-08 1997-03-12 Sandco Automotive Limited Finger follower
DE19543657C2 (en) 1995-11-23 1998-07-02 Schaeffler Waelzlager Ohg Chipless rocker arm or rocker arm

Also Published As

Publication number Publication date
DE59800529D1 (en) 2001-04-19
EP0907008A1 (en) 1999-04-07
ES2156016T3 (en) 2001-06-01
DE19743488A1 (en) 1999-04-08

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