EP2090757B1 - Agencement de levier basculant doté d'un coussinet comprenant des rainures - Google Patents

Agencement de levier basculant doté d'un coussinet comprenant des rainures Download PDF

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Publication number
EP2090757B1
EP2090757B1 EP08018202A EP08018202A EP2090757B1 EP 2090757 B1 EP2090757 B1 EP 2090757B1 EP 08018202 A EP08018202 A EP 08018202A EP 08018202 A EP08018202 A EP 08018202A EP 2090757 B1 EP2090757 B1 EP 2090757B1
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EP
European Patent Office
Prior art keywords
rocker
bearing
rocker arm
groove
oil
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.)
Active
Application number
EP08018202A
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German (de)
English (en)
Other versions
EP2090757A3 (fr
EP2090757A2 (fr
Inventor
Werner Vogel
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.)
MAN Truck and Bus SE
Original Assignee
MAN Nutzfahrzeuge AG
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Application filed by MAN Nutzfahrzeuge AG filed Critical MAN Nutzfahrzeuge AG
Publication of EP2090757A2 publication Critical patent/EP2090757A2/fr
Publication of EP2090757A3 publication Critical patent/EP2090757A3/fr
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Publication of EP2090757B1 publication Critical patent/EP2090757B1/fr
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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
    • F01L1/181—Centre pivot rocking arms

Definitions

  • the invention relates to a rocker arm assembly of an internal combustion engine with a rocker arm and a journal, wherein the bearing pin has a trained as a running surface outer peripheral surface and engages in a bearing shell lined with a central bore of the rocker arm, so that the rocker arm is pivotally mounted on the running surface of the journal, the Bearing journal has a running in its inner first oil passage, which opens in at least one arranged below a central longitudinal axis of the journal outlet opening on the tread, and the fixedly connected to the rocker bearing shell has a hollow cylindrical shape with a shell outer surface and a shell inner surface.
  • the bearing shell which is also referred to as a bearing bush, on its shell inner surface, ie its inner side or its inner, ie the interior of the hollow cylinder facing peripheral surface, inner grooves which are in communication with the first oil passage of the journal.
  • the object of the invention is therefore to provide a rocker arm assembly of the type described, in which a small oil loss occurs.
  • a rocker arm assembly according to the features of claim 1 is given.
  • a lower half of the shell inner surface is provided with at least one inner groove extending in the circumferential direction and ending on both sides below the central longitudinal axis, which extends at least into a region in which the outlet opening of the first oil channel is arranged at a basic position of the rocker arm.
  • the outer shell surface is provided with at least one extending in the circumferential direction, extending to an inlet opening of a rocker arm extending in the second oil groove extending outer groove.
  • the bearing shell has at least one through groove connecting the inner groove and the outer groove.
  • the grooves in the bearing shell extend only partially on the inside thereof. These inner grooves each terminate below the central longitudinal axis, ie below a horizontal plane extending through the central longitudinal axis. They are primarily used to lubricate the tread.
  • Au ⁇ ennuten are also provided in the rocker arm assembly according to the invention, which are in communication with the / the réellenut / s and which are intended to supply oil to the second oil channels connected to the secondary consumers. This division is favorable.
  • the inner and outer grooves can be designed specifically according to their respective function.
  • this measure also has an advantageous effect on the otherwise occurring under load oil loss. Since the internal grooves already end below the central longitudinal axis, the internal grooves are even additionally sealed under load by the bearing journal, which is then pressed more strongly against the lower half of the bearing shell. The larger gap forming under the action of load in the region of the upper half of the bearing shell between the same and the bearing pin does not result in any appreciably increased oil loss in the rocker arm arrangement according to the invention. This area is not supplied with oil in contrast to the prior art. The inner grooves end before, so still in the lower half.
  • the outer grooves which may in particular extend into this region of the upper half of the central bore of the rocker arm, to feed the well disposed there inlet openings of the second oil channels with oil, are due to the in this area in particular unbroken wall of the bearing shell of the under load enlarged gap separated.
  • the same advantageous oil-saving behavior results when the bearing clearance during runtime, e.g. due to aging, enlarged.
  • the first oil passage has a bearing pin completely penetrating and extending below the central longitudinal axis transverse bore. This results in two outlets communicating with the inner groove (s) on the tread, thus providing an improved oil supply to the inner groove (s).
  • the inlet opening is located above the central longitudinal axis in an inner wall of the central bore of the rocker arm, and the outer groove begins below the central longitudinal axis and ends above the central longitudinal axis, wherein it extends at least up to the inlet opening.
  • the outer groove begins below the central longitudinal axis and ends above the central longitudinal axis, wherein it extends at least up to the inlet opening.
  • At least two second oil passages are preferably arranged in the rocker arm and the shell outer surface is provided with at least two outer grooves, each outer groove being associated with only one of the inlet openings of the second oil passages.
  • the oil supply can be adjusted specifically to the respective oil demand of the secondary consumers connected to the second oil channels.
  • the outer grooves have at least partially different groove geometries, in particular different groove depths and / or different groove widths. Even so, the oil throughput in each outer groove can be set according to the specific needs.
  • the passage opening in the bearing shell is arranged in the region in which the outlet opening of the first oil channel is at a basic position of the rocker arm. This results in the best or at least a very good supply of oil to the secondary consumers. The oil can then pass directly from the first oil passage in the outer grooves, ie in particular without much detour within the réellenut / s.
  • the inner groove and the outer groove are each formed as embossing groove.
  • embossed on both sides can be produced well and inexpensively.
  • no additional expenditure is incurred by the additional outer grooves, that is to say by the embossing provided on both sides.
  • Fig. 1 and 2 is an embodiment of a rocker arm assembly 1 shown in detail not shown with internal combustion engine. It comprises a rocker arm 2 with a central bore 3 and a bearing journal 4, whose outer peripheral surface is a bearing or running surface 5, on which the rocker arm 2 is mounted navschwenkbar means of a bearing shell 6.
  • the bearing shell 6 is pressed into the central bore 3 of the rocker arm 2, so that a solid mechanical connection between these two components results.
  • the bearing pin 4 engages with its running surface 5 in the bearing shell 6, wherein the bearing shell 6 is pivotally mounted about a central longitudinal axis 7 of the bearing journal 4 on the bearing journal 4.
  • journal 4 Within the journal 4 extends in the axial direction, ie in the direction of the central longitudinal axis 7, eccentrically and in the lower half of the journal 4, an oil longitudinal channel 8, from which an oil cross channel 9 branches off in the direction of the tread 5 at the level of the rocker arm 2.
  • the oil transverse channel 9 is designed as a transverse bore, which completely penetrates the bearing journal 4 and opens on the running surface 5 into two outlet openings 10 and 11.
  • the oil transverse channel 9 runs like the oil longitudinal channel 8 below the central longitudinal axis 7, or below a central longitudinal axis. 7 comprehensive horizontal plane.
  • the two outlet openings 10 and 11 are located in the lower half of the journal. 4
  • the rocker arm 2 has two lever arms 12 and 13, one of which is mechanically connected by means of a pressed-in this lever arm 12 ball pressure piece 14 and a push rod 15 with a camshaft not shown in detail, whereas the other lever arm 13 is in mechanical contact with a valve bridge 16.
  • a valve bridge 16 By means of the valve bridge 16, two cylinder valves, also not shown in detail, of the internal combustion engine can be actuated.
  • each of the lever arms 12 and 13 each have an oil passage 17 and 18, which supplies the valve bridge 16 and the possibly hydraulically operated components connected thereto or the ball pressure piece 14 as oil secondary consumers with oil.
  • the oil passages 17 and 18 each have one in the upper half of the central bore 3 of the rocker arm 2, ie above the central longitudinal axis 7, arranged in an inner wall of the central bore 3 inlet opening 19 and 20th
  • the bearing shell 6 fixedly connected to the rocker arm 2 is designed as a hollow cylinder having on the outer side a shell outer surface 21 which forms the outer peripheral surface of the hollow cylinder and on the inside of a shell inner surface 22, which is the inner, i. the inner space of the hollow cylinder facing peripheral surface forms, has.
  • the shell outer surface 21 of the bearing shell 6 is due to the press connection directly and closely against the inner wall of the central bore 3 of the rocker arm 2.
  • the shell inner surface 22 is provided in its lower half with an inner groove 23 ending on both sides below the central longitudinal axis 7, ie, in turn, below the horizontal plane passing through the central longitudinal axis 7. It runs in the circumferential direction and extends at the in Fig. 1 and 2 shown basic position of the rocker arm 2 at both ends to slightly beyond the respective outlet opening 10 and 11 of the oil transverse channel 9 addition.
  • the oil cross channel 9 is connected by means of its two outlet openings 10 and 11 with this inner groove 23 in connection and feeds the latter at least in the basic position of the rocker arm 2 on both sides with oil.
  • This Basic position in which the push rod rests against the cam base circle of the camshaft and the valves which can be actuated via the valve bridge 16 are closed. Both exit openings 10 and 11 border the inner groove 23.
  • the shell outer surface 21 is provided with two outer grooves 24 and 25, which also extend in the circumferential direction. They each begin in the lower half of the central bore 3 and extend in the upper half of the central bore 3 to slightly above each one of the inlet openings 19 and 20 also.
  • Each of the oil channels 17 and 18 is connected by means of its inlet opening 19 or 20 with one of the outer grooves 24 and 25 in connection.
  • Each of the outer grooves 24 and 25 feeds its associated oil passage 17 and 18 with oil.
  • the inner groove 23 is connected to each of the two outer grooves 24 and 25.
  • a passage opening 26 or 27 designed as a through-bore is provided in each case in the bearing shell 6.
  • Each of the passage openings 26 and 27 is located opposite one of the two outlet openings 10 and 11 of the oil transverse channel 9 when the rocker arm 2 is in the home position.
  • the oil supplied via the oil cross channel 9 is required firstly for lubricating the running surface 5 and secondly for supplying the auxiliary consumers connected to the oil passages 17 and 18.
  • substantially separate structural means are provided in the rocker arm assembly 1.
  • a corresponding partial flow of oil, which leads directly from the outlet openings 10 and 11 in the inner groove 23 is denoted by 28.
  • the outer grooves 24 and 25 are provided for oil supply to the secondary consumers.
  • a belonging thereto partial oil flow, from the outlet opening 10 and 11, via the passage opening 26 and 27, the outer groove 24 and 25, the inlet opening 19 and 20 in the oil passage 17 and 18 leads, is denoted by 29 and 30, respectively.
  • the oil flow rate for the oil supply of the secondary consumers can be adjusted in each of the outer grooves 24 and 25 specifically to the respective requirements of each connected auxiliary consumers on the individually predetermined groove geometry, eg the respective groove depth or groove width. Both outer grooves 24 and 25 may thus have different geometry parameters.
  • the grooves 23 to 25 provided on the inside and outside of the bearing shell 6 in the rocker arm assembly 1, and in particular their special geometric arrangement, have a favorable effect on operating situations during which the bearing journal 4 is locked, e.g. moved under the action of a load in the direction of arrow 31. Then it comes in the region of the upper half of the bearing pin 4 to form a gap 32 between the tread 5 and the shell inner surface 22 of the bearing shell 6. Such a gap may also form due to an increase in the bearing clearance in the course of service life. In conventional rocker arm arrangements such a gap leads to an oil loss, which must be compensated by an appropriately sized oil supply.
  • the rocker arm assembly 1, however, is designed so that such oil loss does not occur or at least not to a significant extent.
  • the journal 4 moves in the direction of the arrow 31, it comes to lateral areas 33 and 34 of the tread 5, which are approximately at the height of the central longitudinal axis 7, but in any case above the two upper ends of the inner groove 23, to a seal the inner groove 23 opposite to the gap 32 forming in the upper half.
  • an axial oil outlet at this gap 32 is prevented.
  • both the oil supply to the tread 5 by means of the then specially sealed inner groove 23 and the oil supply to the auxiliary consumers by means of the outer grooves 24 and 25 remains unchanged.
  • the rocker arm assembly 1 thus characterized by an extremely low oil loss, in particular at a load on the bearing journal 4, but also in any other conditional bearing play enlargement.

Landscapes

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

Claims (7)

  1. Montage de culbuteur de moteur à combustion comportant un culbuteur (2) et un tourillon de palier (4), selon lequel :
    a) le tourillon de palier (4) comporte une surface périphérique réalisée sous la forme d'une surface de circulation (5) et se logeant dans l'alésage central (3) du culbuteur (2) habillé d'un coussinet (6) de façon que le culbuteur (2) soit monté pivotant sur la surface de circulation (5) du tourillon de palier (4),
    b) le tourillon de palier (4) comporte un premier canal d'huile (8, 9) passant à l'intérieur de celui-ci et ayant au moins un orifice de sortie (10, 11) débouchant dans la surface de circulation (5) en dessous de l'axe longitudinal (7) du tourillon de palier (4),
    c) le coussinet (6) relié solidairement au culbuteur (2) a une forme cylindrique creuse munie d'une surface extérieure (21) et d'une surface intérieure (22) de coussinet,
    d) une moitié inférieure de la surface intérieure (22) du coussinet est munie d'au moins une rainure intérieure (23) passant dans la direction périphérique et se terminant des deux côtés en dessous de l'axe longitudinal (7), cette rainure s'étendant au moins jusque dans une zone dans laquelle l'orifice de sortie (10, 11) du premier canal d'huile (8, 9) se trouve pour une position de base du culbuteur (2),
    e) la surface extérieure (21) du coussinet est munie d'au moins une rainure extérieure (24, 25) s'étendant au moins dans la direction périphérique jusqu'à un orifice d'entrée (19, 20) d'un second canal d'huile (17, 18) passant dans le culbuteur (2),
    f) le coussinet (6) comporte au moins un orifice traversant (26, 27) reliant la rainure intérieur (23) et la rainure extérieure (24, 25).
  2. Montage de culbuteur selon la revendication 1,
    caractérisé en ce que
    le premier canal d'huile (8, 9) comporte un perçage transversal (9) traversant complètement le tourillon et passant sous l'axe longitudinal (7).
  3. Montage de culbuteur selon la revendication 1,
    caractérisé en ce que
    l'orifice d'entrée (19, 20) se trouve sous l'axe longitudinal (7) dans une paroi intérieure du perçage central (3) du culbuteur (2) et la rainure extérieure (24, 25) commence en dessous de l'axe longitudinal (7) et se termine au-dessus de l'axe longitudinal (7), cette rainure arrivant au moins jusqu'à l'orifice d'entrée (19, 20).
  4. Montage de culbuteur selon la revendication 1,
    caractérisé en ce que
    le culbuteur (2) comporte au moins deux seconds canaux d'huile (17, 18) et la surface extérieure (21) du coussinet est munie d'au moins deux rainures extérieures (24, 25),
    chaque rainure extérieure (24, 25) ne comporte que l'un des orifices d'entrée (19, 20) des seconds canaux d'huile (17, 18).
  5. Montage de culbuteur selon la revendication 4,
    caractérisé en ce que
    les rainures extérieures (24, 25) ont au moins des géométries de rainure partiellement différentes.
  6. Montage de culbuteur selon la revendication 1,
    caractérisé en ce que
    l'orifice traversant (26, 27) se trouve dans la zone dans laquelle se trouve l'orifice de sortie (10, 11) du premier canal d'huile (8, 9) lorsque le culbuteur (2) est dans sa position de base.
  7. Montage de culbuteur selon la revendication 1,
    caractérisé en ce que
    la rainure intérieure (23) et la rainure extérieure (24, 25) sont réalisées chacune sous la forme d'une rainure imprimée.
EP08018202A 2008-02-14 2008-10-17 Agencement de levier basculant doté d'un coussinet comprenant des rainures Active EP2090757B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008009170A DE102008009170A1 (de) 2008-02-14 2008-02-14 Kipphebelanordnung mit einer Nuten aufweisenden Lagerschale

Publications (3)

Publication Number Publication Date
EP2090757A2 EP2090757A2 (fr) 2009-08-19
EP2090757A3 EP2090757A3 (fr) 2009-09-16
EP2090757B1 true EP2090757B1 (fr) 2010-07-07

Family

ID=40612844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08018202A Active EP2090757B1 (fr) 2008-02-14 2008-10-17 Agencement de levier basculant doté d'un coussinet comprenant des rainures

Country Status (6)

Country Link
US (1) US8096274B2 (fr)
EP (1) EP2090757B1 (fr)
CN (1) CN101509401B (fr)
BR (1) BRPI0900176B1 (fr)
DE (2) DE102008009170A1 (fr)
RU (1) RU2410548C2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700025353A1 (it) * 2017-03-07 2018-09-07 Gnutti Carlo Spa Punteria di motore endotermico
CN108071432A (zh) * 2017-12-12 2018-05-25 安徽华菱汽车有限公司 一种发动机摇臂象足
US11668210B2 (en) * 2020-07-14 2023-06-06 Powerhouse Engine Solutions Switzerland IP Holding GmbH Systems and methods for rocker arm lubrication

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB528997A (en) * 1939-05-19 1940-11-12 William Warren Triggs Improvements in levers or rockers, particularly for the valve gear of internal combustion engines
GB667791A (en) * 1948-09-03 1952-03-05 Toledo Stamping And Mfg Compan Improvements in or relating to engine rocker arm assemblies
US2563699A (en) * 1949-11-21 1951-08-07 John R Winter Sr Rocker arm construction
US4132196A (en) * 1975-10-02 1979-01-02 Toledo Stamping & Manufacturing Company Rocker arm
DE2930337A1 (de) * 1979-07-26 1981-02-19 Maschf Augsburg Nuernberg Ag Ventilsteuermechanismus fuer ein- bzw. auslassventile von brennkraftmaschinen
DE3024306A1 (de) * 1980-06-27 1982-01-21 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg Gleitlager fuer oszillierende schwenkbewegungen
AU2183399A (en) * 1999-01-05 2000-07-24 Marimuthu Ramu Thiyagarajan A low cost new internal combustion engine with increased mechanical efficiency, fuel saver and pollution controlled
WO2001018373A1 (fr) * 1999-09-10 2001-03-15 Diesel Engine Retarders, Inc. Systeme culbuteur a perte de mouvement muni d'un frein par compression integre
DE102005040649A1 (de) * 2005-08-27 2007-03-01 Schaeffler Kg Variabler Ventiltrieb einer Brennkraftmaschine

Also Published As

Publication number Publication date
DE102008009170A1 (de) 2009-08-20
RU2009105152A (ru) 2010-08-20
US20090205600A1 (en) 2009-08-20
CN101509401B (zh) 2012-09-05
DE502008000898D1 (de) 2010-08-19
EP2090757A3 (fr) 2009-09-16
US8096274B2 (en) 2012-01-17
CN101509401A (zh) 2009-08-19
BRPI0900176A2 (pt) 2009-09-29
EP2090757A2 (fr) 2009-08-19
BRPI0900176B1 (pt) 2019-07-02
RU2410548C2 (ru) 2011-01-27

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