EP0812380A1 - Moteur a combustion interne comportant une commande a came - Google Patents

Moteur a combustion interne comportant une commande a came

Info

Publication number
EP0812380A1
EP0812380A1 EP96934381A EP96934381A EP0812380A1 EP 0812380 A1 EP0812380 A1 EP 0812380A1 EP 96934381 A EP96934381 A EP 96934381A EP 96934381 A EP96934381 A EP 96934381A EP 0812380 A1 EP0812380 A1 EP 0812380A1
Authority
EP
European Patent Office
Prior art keywords
bore
roller
combustion engine
lubricant
internal combustion
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.)
Ceased
Application number
EP96934381A
Other languages
German (de)
English (en)
Inventor
Uwe Kuhn
Jürgen KIRSCHNER
Sandro Soccol
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0812380A1 publication Critical patent/EP0812380A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F01M9/107—Lubrication of valve gear or auxiliaries of rocker shaft bearings
    • 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
    • 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

Definitions

  • the invention is based on an internal combustion engine according to the preamble of claim 1.
  • each cylinder of the internal combustion engine to be supplied has a separate one
  • Associated fuel injector This is controlled via a cam drive that has a rocker arm that can be pivoted about a fixed bearing point. Upstream of this rocker arm is a roller running on a cam track of a camshaft, which transmits lifting and lowering movements to a drive part which is operatively connected to the fuel injection device.
  • the internal combustion engine according to the invention with the characterizing features of patent claim 1 has the advantage that a roller mounted in the rocker arm can be supplied with lubricant through a bore arranged in the roller bolt through a lubricant nozzle arranged in the region of a curved path of the roller.
  • lubricant can be absorbed at least at the point in time at which the roller bolt mounted in the rocker arm passes a lubricant supply point.
  • the lubricant is advantageously sprayed in the direction of the bearing point, so that lubricant particles can get into the bore and thus between the roller and roller pin for lubrication.
  • a lubricant supply can contribute to the lubrication of the roller pin to the rocker arm in the case of a rotatably mounted roller pin.
  • a roller pin on a rocker arm is provided for a rotationally fixed bearing in such a way that the radially extending transverse bore is arranged so as to point away from the cam track, so that lubricant can be reliably supplied to the bearing point.
  • At least one transverse bore completely penetrating the roller bolt is provided in the case of a rotatably mounted roller bolt.
  • the bore in the roller bolt facing the lubricant supply device has a funnel-shaped opening.
  • the lubricant supply device can be arranged in an area in which the roller passes through a bottom dead center position of the cam track. In this position there is the lowest bearing load between the roller and roller conveyor, so that the lubricant supplied can have a better distribution between the roller and the roller pin.
  • the lubricant supply according to the invention on a cam drive can be used on fuel injection devices or also on the drive of gas exchange valves of the internal combustion engine.
  • FIG. 1 shows a schematic side view of a cam drive according to the invention of an internal combustion engine
  • FIG. 2 shows a schematic section along the line II-II in FIG. 1 with a lubricant supply device
  • FIG. 3 shows a sectional view of a roller bolt that rotates in the rocker arm 4 shows an alternative embodiment of a roller bolt to FIG. 3
  • FIG. 5 shows a cross section of a roller bolt which is rotatably mounted in the rocker arm
  • FIG. 6 shows a schematic view of a lubricant supply device arranged between two cam drives.
  • FIG. 1 shows a section of a cylinder head of an internal combustion engine which has a cam drive 11, only the parts essential to the invention being shown.
  • a rotating camshaft 12 with a cam 13 having a cam track is arranged inside the cylinder head of the internal combustion engine. This actuates via a roller 14 running on the cam track a rocker arm 16, which is mounted in a rotationally fixed manner to the cylinder head via a bearing 17.
  • the rocker arm 16 is arranged pivotably about the bearing axis 18 and actuated via a Drive part 19 a pump nozzle 21.
  • Such a cam drive 11 can also serve to drive valve controls, pump pistons or the like.
  • the roller 14 is mounted on a roller pin 22 so as to be rotatable about an axis of rotation 23 which at the same time forms a longitudinal axis of the roller pin 22.
  • the roller pin 22 can be rotationally fixed in the application or freely rotatably mounted in the rocker arm 16.
  • FIG. 2 shows a schematic sectional illustration along the line II-II in FIG. 1.
  • a lubricant supply device 26 is arranged opposite an end face 24 of the roller bolt 22. This lubricant supply device 26 can be connected to a lubricant supply channel 27 of a lubricant circuit.
  • the lubricant supply device 26 is formed by a screw bolt 28 with a central bore 29 and a transverse bore 31, lubricant being able to be supplied via the bores 29, 31 to a lubricant nozzle 32 which is arranged in a sleeve 33.
  • the lubricant nozzle 32 is arranged at a short distance from the end face 24 of the roller pin 22, so that when the lubricant is sprayed, a large amount of lubricant can be fed to a bore 30 arranged in the roller pin 22.
  • the bore 30 has a bore section 34 which is arranged in the bearing axis 23 of the roller pin 22.
  • the bore section 34 has a funnel-shaped opening 36 so that when driving over the lubricant nozzle 32 during a stroke movement, the greatest possible amount of lubricant can get into the bore section 34 and can reach the bearing point between the roller 14 and the roller pin 22 via a transverse bore 37.
  • the bore portion 34 is designed as a blind hole according to this embodiment.
  • the lubricant is advantageously sprayed through a nozzle 32, so that a spray field striking the end face 24 essentially has a diameter of the funnel-shaped opening 36. This can give an optimal supply of lubricant.
  • the lubricant supply device 26 can be arranged in one plane of a path of the bore 30 in the region of the entire continuous stroke movement.
  • the arrangement of the lubricant nozzle 32 at the bottom dead center of the cam track is particularly advantageous. As a result, the load between the roller 14 and the roller pin 22 is the least, which can result in an improved distribution of the lubricant.
  • FIG. 3 shows a cross section of a roller bolt 22 arranged in a rotationally fixed manner in a rocker arm 16.
  • This simple embodiment has a bore section 34 which is designed as a blind bore.
  • Two radially arranged transverse bores 37 which lead the lubricant to the bearing point between the roller pin 22 and the roller 14 open into this.
  • the transverse bores 37 are funnel-shaped at one end facing the roller 14, so that the lubricant can escape over a larger area.
  • the installation of such a roller pin 22 is advantageously to be provided in such a way that the transverse bore 37 points away from the cam track.
  • FIG. 4 shows an alternative embodiment of a roller bolt 22 arranged in a rotationally fixed manner in the rocker arm 16.
  • the bore 30 has on an end face 24 funnel-shaped opening 36.
  • the bore 30 is designed as a stepped bore and projects with its enlarged bore section at least over half the length of the roller bolt 22, so that the transverse bore 37 can be arranged radially outwards approximately in the central region of the roller bolt 22.
  • the installation position of the roller pin 22 corresponds to the installation position described for FIG. 3.
  • the bore section 34 extends, for example, over two thirds or three quarters of the length of the roller bolt 22, it being possible to arrange a plurality of transverse bores 37 which connect the bore section 34 to the bearing point.
  • FIG. 5 shows a further embodiment of a roller pin 22, which enables a rotatable mounting in the rocker arm 16.
  • the bore section 34 is arranged continuously, the transverse bores 37 arranged in the central region being offset from one another by 180 ° and thus making it possible to supply lubricant at two points opposite one another.
  • the arrangement shown in FIG. 5 has the advantage that the roller pin 22 can be freely arranged in relation to the installation direction, since a funnel-shaped opening 36 for the through-bore is arranged on both end faces.
  • the cross bores 37 can also be arranged at any angle to one another.
  • several transverse bores 37 can be provided in a radial plane as well as in several radial planes.
  • these are arranged offset from one another by 180 °, so that such a continuous transverse bore 37 can be produced in one operation.
  • FIG. 6 shows an alternative embodiment of a lubricant supply device 26 to FIG. 2.
  • This lubricant supply device 26 has two lubricant nozzles 32, so that if the lubricant supply device 26 is arranged between two cam drives 11 with one lubricant supply device 26, both cam drives 11 can be supplied with lubricant.
  • a lubricant supply 26 can be provided between every second cam drive 11, as a result of which an inexpensive design can be provided.
  • a lubricant supply device 26 shown in FIG. 6 can be arranged in each intermediate space formed by two cam drives 11.
  • a roller pin 22 according to FIG. 5 is advantageously provided in the rocker arm 16, so that lubricant can be supplied from both sides.
  • a cam drive 11 can also be given for an alternative embodiment to FIG. 1.
  • the rocker arm 16 is fixedly connected at one end to the cylinder head via the bearing 17.
  • a camshaft 12 is provided, which in the camshaft 13 middle region of the rocker arm drives roller 14.
  • the drive part 19 is provided, which drives a pump nozzle 21 or the like.

Landscapes

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

Abstract

L'invention concerne un moteur à combustion interne comportant une commande à came (11) présentant un culbuteur (16) monté pivotant dans une culasse, un galet (14) monté dans ledit culbuteur (16) qui roule sur la surface latérale d'une came (13) d'un arbre à cames (12) et sert à entraîner des éléments constitutifs. L'invention se caractérise en ce que le galet (14) situé dans le culbuteur (16) est monté sur un axe (22) comportant au moins sur une face (34) un alésage (30) menant au point d'appui du galet (14) et où peut être acheminé du lubrifiant au moment où un levage est effectué, cela par un dispositif d'acheminement de lubrifiant placé dans la zone du trajet suivi par l'alésage.
EP96934381A 1995-12-30 1996-08-27 Moteur a combustion interne comportant une commande a came Ceased EP0812380A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19549221 1995-12-30
DE19549221A DE19549221A1 (de) 1995-12-30 1995-12-30 Brennkraftmaschine mit einem Nockenantrieb
PCT/DE1996/001584 WO1997024514A1 (fr) 1995-12-30 1996-08-27 Moteur a combustion interne comportant une commande a came

Publications (1)

Publication Number Publication Date
EP0812380A1 true EP0812380A1 (fr) 1997-12-17

Family

ID=7781693

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96934381A Ceased EP0812380A1 (fr) 1995-12-30 1996-08-27 Moteur a combustion interne comportant une commande a came

Country Status (7)

Country Link
US (1) US5823154A (fr)
EP (1) EP0812380A1 (fr)
JP (1) JPH11501711A (fr)
KR (1) KR100301334B1 (fr)
BR (1) BR9607421A (fr)
DE (1) DE19549221A1 (fr)
WO (1) WO1997024514A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1113426A (ja) 1997-06-23 1999-01-19 Daido Metal Co Ltd ローラ支持装置
DE19749079B4 (de) * 1997-11-06 2007-12-20 Schaeffler Kg Nockenfolger eines Ventiltriebs einer Brennkraftmaschine
DE60029474T2 (de) 1999-12-09 2007-02-15 International Engine Intellectual Property Company, LLC., Warrenville Ergeignis-Überwachungssystem in einem Abgas-Rückführungs-System eines Verbrennungsmotors
US6470843B2 (en) * 2001-02-16 2002-10-29 Detroit Diesel Corporation Rocker arm adjustment screw assembly
DE102005009658B4 (de) * 2005-02-02 2014-05-22 Continental Teves Ag & Co. Ohg Hydraulikaggregat
US7980216B2 (en) * 2008-03-14 2011-07-19 GM Global Technology Operations LLC Rocker arm assembly having slider roller oil pumping features
US20100316506A1 (en) * 2009-06-11 2010-12-16 Gm Global Technology Operations, Inc. Engine fuel pump drive system
US9309787B2 (en) 2014-06-30 2016-04-12 Electro-Motive Diesel, Inc. Engine rocker arm and roller assembly
DE102015218632A1 (de) 2015-09-28 2017-03-30 Aktiebolaget Skf Bolzen eines Ventilsteuerungshebels
DE102016205833A1 (de) * 2016-04-07 2017-10-12 Mahle International Gmbh Ventiltrieb für eine Brennkraftmaschine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB280024A (en) * 1926-10-22 1927-11-10 Whitehead Torpedo Company Ltd Improvements in or relating to the valve gear of internal combustion and other engines
US4858574A (en) * 1986-12-26 1989-08-22 Honda Giken Kogyo Kabushiki Kaisha Hydraulic circuit for a valve operating timing control device for an internal combustion engine
DE3933119A1 (de) * 1989-10-04 1991-04-11 Schaeffler Waelzlager Kg Lagerbolzen fuer ein radialwaelzlager
US5127374A (en) * 1991-11-21 1992-07-07 Morel Jr Edward J Valve lifter
DE4334505A1 (de) * 1992-10-14 1994-04-21 Volkswagen Ag Rollenstößel für den Nocken-Ventiltrieb eines Hubventils mit einer hydraulischen Ventilspielausgleichsvorrichtung
JP3473065B2 (ja) * 1993-10-30 2003-12-02 スズキ株式会社 ロッカアーム
US5588413A (en) * 1995-03-14 1996-12-31 Caterpillar Inc. Engine assembly with leaf spring cam follower
US5566652A (en) * 1995-10-06 1996-10-22 Eaton Corporation Light weight cam follower

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9724514A1 *

Also Published As

Publication number Publication date
US5823154A (en) 1998-10-20
BR9607421A (pt) 1998-06-23
JPH11501711A (ja) 1999-02-09
KR100301334B1 (ko) 2001-11-22
DE19549221A1 (de) 1997-07-03
WO1997024514A1 (fr) 1997-07-10
KR19980702643A (ko) 1998-08-05

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