WO2005040562A1 - Mecanisme de distribution de moteur a combustion interne comprenant au moins un arbre a cames - Google Patents

Mecanisme de distribution de moteur a combustion interne comprenant au moins un arbre a cames Download PDF

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Publication number
WO2005040562A1
WO2005040562A1 PCT/EP2004/011697 EP2004011697W WO2005040562A1 WO 2005040562 A1 WO2005040562 A1 WO 2005040562A1 EP 2004011697 W EP2004011697 W EP 2004011697W WO 2005040562 A1 WO2005040562 A1 WO 2005040562A1
Authority
WO
WIPO (PCT)
Prior art keywords
cam
piece
valve train
stroke
tracks
Prior art date
Application number
PCT/EP2004/011697
Other languages
German (de)
English (en)
Inventor
Stefan Dengler
Original Assignee
Audi 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 Audi Ag filed Critical Audi Ag
Priority to US10/577,048 priority Critical patent/US7762225B2/en
Priority to EP04790533.6A priority patent/EP1680577B1/fr
Publication of WO2005040562A1 publication Critical patent/WO2005040562A1/fr

Links

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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams
    • 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
    • F01L1/267—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 with means for varying the timing or the lift of the valves
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/34413—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using composite camshafts, e.g. with cams being able to move relative to the camshaft
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve

Definitions

  • the invention relates to the valve train of an internal combustion engine with at least one camshaft according to the preamble of claim 1.
  • mechanical devices which influence the working cycle of the valve train and enable, for example, a speed-dependent change in the opening times or the stroke of the gas exchange valves.
  • Such a device is known from the publication DE 42 30 877, in which a cam piece is arranged in a rotationally fixed and axially displaceable manner on a basic camshaft.
  • the cam piece consists of a tubular support on which at least one cam is arranged, in which several different cam tracks emerge axially offset from a common base circle. Due to the axial displacement of the cam piece on the basic camshaft, a gas exchange valve is actuated by the differently shaped cam raceways, the cam raceways being able to differ in the stroke contour and / or in the phase position.
  • An advantageous device for the axial displacement of a cam piece is known from the document EP 0 798 451, according to which a worm drive is formed on both sides of the cam piece, which has a cam track as a recess, in which an actuator can engage for the axial displacement of the cam piece.
  • Cams are arranged, the two cams each having two cam tracks.
  • the invention has for its object to provide a cam drive valve assembly of an internal combustion engine according to the preamble of claim, in which the cam member is further developed so that further functions can be represented by the valve train. This object is achieved by the features in the characterizing part of claim 1, according to which the first cam and the at least second cam of a cam piece differ from one another in at least one cam track.
  • the filling of a combustion chamber can be significantly influenced. For example, a tumble flow can be created.
  • the cam tracks of the first cam and the at least second cam of a cam piece differ from one another in the stroke contour and / or in the phase position.
  • the stroke contour of a cam determines the start of the opening of the gas exchange valve, the course of the opening of the gas exchange valve, the maximum lift height of the gas exchange valve, the course of the closing of the gas exchange valve and the closing of the gas exchange valve.
  • the phase position determines the camshaft rotation angle at which the maximum stroke height of the stroke contour is positioned. For a given stroke contour, the camshaft rotation angles at which the gas exchange valve opens and closes are also defined.
  • the cam raceways of a cam can differ so far that the maximum stroke of the stroke contour of one cam raceway is formed outside the stroke contour of the other cam raceway of the cam.
  • the gas exchange processes in the combustion chambers of the cylinders can be influenced in many ways by the valve train of an internal combustion engine according to the invention, in which the cams of a cam piece have different cam tracks.
  • valve train according to the invention of an internal combustion engine is illustrated and explained below using an exemplary embodiment in conjunction with two figures.
  • FIG. 1 shows a cam piece having two cams, each with two cam tracks
  • Figure 2 shows the four different cam contours of the two cams of the cam piece.
  • a six-cylinder internal combustion engine with two overhead camshafts for driving a motor vehicle is equipped with a device for adjusting the stroke and the opening times of the intake-side gas exchange valves.
  • the device consists of six cam packs, which are arranged in a rotationally fixed and axially displaceable manner on the camshaft which actuates the gas exchange valves on the inlet side.
  • Each cam package is assigned to exactly one cylinder, with each cylinder of the internal combustion engine having two gas exchange valves on the inlet side.
  • two cams are formed on the cam piece, each cam actuating an inlet-side gas exchange valve.
  • a worm gear is formed on both sides of the cam pieces, in which a cam track is formed as a depression.
  • the cam tracks of the two worm drives of a cam piece are mirror images of each other, which causes the cam piece to move axially in both directions.
  • the cam pieces are axially displaced by actuators arranged radially to the camshaft, which are designed as electromagnetic valves and each consist of an actuating pin and two electromagnets.
  • the actuators are firmly connected to the cylinder head of the internal combustion engine.
  • the actuating pin can be extended and retracted by the electromagnets.
  • the actuating pin engages in the recess of a worm drive forming the cam track, the cam piece being axially displaced by the rotation of the camshaft during operation of the internal combustion engine. That enables the torsional strength with simultaneous axial displaceability
  • Connection between the camshaft and the cam piece consists of a toothing which is formed on the camshaft as an external toothing and in the cam piece as an internal toothing.
  • the toothing is designed as a plurality of teeth.
  • the two cams of a cam piece each have two cam tracks, a cam track for a small lifting height of the gas exchange valve and a cam track for a large lifting height of the gas exchange valve.
  • the cam track with the small stroke height is switched at engine speeds below 2500 revolutions per minute
  • the cam track with the large stroke height is switched at engine speeds above 2500 revolutions per minute.
  • FIG. 1 shows a representation of the cam piece 1 having a first cam 4 and a second cam 5, both cams 4, 5 each having two cam tracks 4.1, 4.2, 5.1, 5.2.
  • a worm drive 2, 3 is formed on each of the two end faces of the cam piece 1.
  • the worm drives 2, 3 each have a cam track 2.1, 3.1, in which the actuators engage to move the cam piece 1.
  • the two cam tracks 4.1, 5.1, which have the small lifting height, and also the two cam tracks 4.2, 5.2, which have the large lifting height, are not completely worked out in the same way.
  • FIG. 2 shows the four different stroke contours of the two cams 4, 5 of the cam piece, each having two cam tracks 4.1, 4.2, 5.1, 5.2 1.
  • the two cam tracks 4.1 having the small cam lift
  • the cam track 5.1 has a stroke contour through which the gas exchange valve is opened at an earlier camshaft rotation angle.
  • the maximum cam stroke of the cam track 5.1 is slightly higher than the cam stroke of the cam track 4.1.
  • the closing of the gas exchange valve takes place slightly earlier in the cam track 5.1 than in the cam track 4.1.
  • the cam track 5.2 has a stroke contour through which the gas exchange valve is opened at an earlier camshaft rotation angle.
  • the maximum cam stroke of the cam track 4.2 is slightly smaller than the cam stroke of the cam track 5.2.
  • the closing of the gas exchange valve takes place slightly earlier in the cam track 4.2 than in the cam track 5.2.
  • the cam tracks of one cam can be designed so differently that the maximum stroke of the stroke contour of one cam track is formed outside the stroke contour of the other cam track.
  • the thermodynamic advantages of the axially displaceable cam pieces can be further optimized by the valve train according to the invention of the internal combustion engine with four cam pieces having different cam tracks. LIST OF REFERENCE NUMBERS

Abstract

La présente invention concerne un mécanisme de distribution d'un moteur à combustion interne, qui présente des pièces à came à mobilité axiale. Une pièce à came présente au moins deux cames qui comprennent respectivement au moins deux voies de came. La première came et la seconde came d'une pièce à came se différencient en au moins une voie de came.
PCT/EP2004/011697 2003-10-25 2004-10-16 Mecanisme de distribution de moteur a combustion interne comprenant au moins un arbre a cames WO2005040562A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US10/577,048 US7762225B2 (en) 2003-10-25 2004-10-16 Valve train of an internal combustion engine comprising at least one camshaft
EP04790533.6A EP1680577B1 (fr) 2003-10-25 2004-10-16 Mecanisme de distribution de moteur a combustion interne comprenant au moins un arbre a cames

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003149898 DE10349898A1 (de) 2003-10-25 2003-10-25 Ventiltrieb einer Brennkraftmaschine mit mindestens einer Nockenwelle
DE10349898.2 2003-10-25

Publications (1)

Publication Number Publication Date
WO2005040562A1 true WO2005040562A1 (fr) 2005-05-06

Family

ID=34485063

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/011697 WO2005040562A1 (fr) 2003-10-25 2004-10-16 Mecanisme de distribution de moteur a combustion interne comprenant au moins un arbre a cames

Country Status (3)

Country Link
EP (1) EP1680577B1 (fr)
DE (1) DE10349898A1 (fr)
WO (1) WO2005040562A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008033230A1 (de) 2008-01-04 2009-07-09 Hydraulik-Ring Gmbh Doppelter Nockenwellenversteller in Schichtaufbau
DE102008023098A1 (de) 2008-05-09 2009-12-17 Hydraulik-Ring Gmbh Doppelter Nockenwellenversteller in Schichtaufbau
US7841311B2 (en) 2008-01-04 2010-11-30 Hilite International Inc. Variable valve timing device
US7963261B2 (en) * 2005-07-15 2011-06-21 Schaeffler Kg Valve drive for an internal combustion engine
EP2415979A1 (fr) 2010-08-04 2012-02-08 Hydraulik-Ring GmbH Déphaseur d'arbre à cames

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010020035A1 (de) 2010-05-11 2011-11-17 Volkswagen Ag Ventiltrieb einer Brennkraftmaschine
DE102012010868A1 (de) 2012-05-31 2013-12-05 Avl Deutschland Gmbh Verfahren und Vorrichtung zum Überwachen einer Aktuatorvorrichtung
DE102012012064A1 (de) 2012-06-15 2013-12-19 Avl Deutschland Gmbh Führungsnutanordnung an einer Welle sowie Verfahren zum axialen Verschieben einer Welle mit einer Führungsnutanordnung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE463654A (fr)
US1556410A (en) * 1923-12-12 1925-10-06 James L Boyer Valve-operating mechanism for internal-combustion engines
DE4230877A1 (de) 1991-09-30 1993-04-01 Volkswagen Ag Ventilsteuerung fuer ein hubventil mit zwei nocken
EP0798451A1 (fr) 1996-03-25 1997-10-01 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Commande de soupape d'un moteur à combustion interne
DE10054623A1 (de) * 2000-11-03 2002-05-08 Audi Ag Vorrichtung zum Umschalten zumindest eines Nockenpaketes
DE10148243A1 (de) 2001-09-28 2003-04-10 Ina Schaeffler Kg Ventiltrieb mit Ventilhubumschaltung für die Gaswechselventile eines 4-Takt-Verbrennungsmotors

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62712U (fr) * 1985-06-19 1987-01-06
DE19519048A1 (de) * 1995-05-24 1996-11-28 Hermann Prof Dr Ing Krueger Variabler Ventiltrieb mit mehreren Nocken
DE19625779A1 (de) * 1995-07-08 1997-01-09 Volkswagen Ag Vorrichtung zur Beeinflussung der Ventilerhebungskurven an einer Brennkraftmaschine
DE10148179B4 (de) * 2001-09-28 2015-09-24 Schaeffler Technologies AG & Co. KG Ventiltrieb mit Ventilhubumschaltung für die Gaswechselventile eines 4-Takt-Verbrennungsmotors

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE463654A (fr)
US1556410A (en) * 1923-12-12 1925-10-06 James L Boyer Valve-operating mechanism for internal-combustion engines
DE4230877A1 (de) 1991-09-30 1993-04-01 Volkswagen Ag Ventilsteuerung fuer ein hubventil mit zwei nocken
EP0798451A1 (fr) 1996-03-25 1997-10-01 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Commande de soupape d'un moteur à combustion interne
DE10054623A1 (de) * 2000-11-03 2002-05-08 Audi Ag Vorrichtung zum Umschalten zumindest eines Nockenpaketes
DE10148243A1 (de) 2001-09-28 2003-04-10 Ina Schaeffler Kg Ventiltrieb mit Ventilhubumschaltung für die Gaswechselventile eines 4-Takt-Verbrennungsmotors

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7963261B2 (en) * 2005-07-15 2011-06-21 Schaeffler Kg Valve drive for an internal combustion engine
DE102008033230A1 (de) 2008-01-04 2009-07-09 Hydraulik-Ring Gmbh Doppelter Nockenwellenversteller in Schichtaufbau
DE102008033230B4 (de) * 2008-01-04 2010-05-27 Hydraulik-Ring Gmbh Doppelter Nockenwellenversteller in Schichtaufbau
US7841311B2 (en) 2008-01-04 2010-11-30 Hilite International Inc. Variable valve timing device
US8201528B2 (en) 2008-01-04 2012-06-19 Hilite Germany Gmbh Doubled cam shaft adjuster in layered construction
DE102008023098A1 (de) 2008-05-09 2009-12-17 Hydraulik-Ring Gmbh Doppelter Nockenwellenversteller in Schichtaufbau
EP2415979A1 (fr) 2010-08-04 2012-02-08 Hydraulik-Ring GmbH Déphaseur d'arbre à cames
DE102010033296A1 (de) 2010-08-04 2012-02-09 Hydraulik-Ring Gmbh Nockenwellenversteller, insbesondere mit Nockenwelle
US8677960B2 (en) 2010-08-04 2014-03-25 Hilite Germany Gmbh Camshaft adjuster, in particular with camshaft

Also Published As

Publication number Publication date
EP1680577B1 (fr) 2016-10-05
DE10349898A1 (de) 2005-05-25
EP1680577A1 (fr) 2006-07-19

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