DE102004021376A1 - Valve train for internal combustion engine, has sliding surface forming radial bearing and formed in bearing block, and radially rotating nut connected with lubricant e.g. oil, supply of internal combustion engine - Google Patents

Valve train for internal combustion engine, has sliding surface forming radial bearing and formed in bearing block, and radially rotating nut connected with lubricant e.g. oil, supply of internal combustion engine Download PDF

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Publication number
DE102004021376A1
DE102004021376A1 DE102004021376A DE102004021376A DE102004021376A1 DE 102004021376 A1 DE102004021376 A1 DE 102004021376A1 DE 102004021376 A DE102004021376 A DE 102004021376A DE 102004021376 A DE102004021376 A DE 102004021376A DE 102004021376 A1 DE102004021376 A1 DE 102004021376A1
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Prior art keywords
internal combustion
combustion engine
sliding surface
bearing block
cam carrier
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DE102004021376A
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German (de)
Inventor
Stefan Dengler
Dirk Schöneberg
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Audi AG
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Audi AG
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Priority to DE102004021376A priority Critical patent/DE102004021376A1/en
Publication of DE102004021376A1 publication Critical patent/DE102004021376A1/en
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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
    • 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
    • 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
    • F01L1/053—Camshafts overhead type
    • 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
    • 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
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • 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
    • F01L2001/0476—Camshaft 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
    • 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
    • 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
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

The train has a cam shaft (1) that is arranged on a cam support (2) in a torque proof and axially relocatable manner. The shaft is supported by the cam support that includes a bearing block (3). A sliding surface (3.1) forming a radial bearing is formed in the bearing block. A radially rotating nut (3.2) is formed in the sliding surface, where the nut is connected with lubricant e.g. oil, supply of an internal combustion engine.

Description

Die Erfindung betrifft den Ventiltrieb einer Brennkraftmaschine mit mindestens einer Nockenwelle gemäß dem Oberbegriff des Patentanspruches 1.The Invention relates to the valve train of an internal combustion engine with at least one camshaft according to the preamble of claim 1.

Zur Verbesserung der thermodynamischen Eigenschaften von Brennkraftmaschinen sind mechanische Vorrichtungen bekannt, die das Arbeitsspiel des Ventiltriebes beeinflussen und beispielsweise eine drehzahlabhängige Veränderung der Öffnungszeiten oder des Hubes der Gaswechselventile ermöglichen.to Improvement of the thermodynamic properties of internal combustion engines are known mechanical devices that the working cycle of the Valve drive affect and, for example, a speed-dependent change the opening hours or the stroke of the gas exchange valves allow.

Aus der Druckschrift DE 42 30 877 ist eine derartige Vorrichtung bekannt, bei der ein Nockenträger drehfest und axial verschiebbar auf einer Grundnockenwelle angeordnet ist. Der Nockenträger besteht dabei aus einem rohrförmigen Träger, auf dem mindestens ein Nocken angeordnet ist, bei dem aus einem gemeinsamen Grundkreis axial versetzt mehrere unterschiedliche Nockenlaufbahnen hervorgehen. Durch das axiale Verschieben des Nockenträgers auf der Grundnockenwelle wird ein Gaswechselventil durch die unterschiedlich geformten Nockenlaufbahnen betätigt, wobei sich die Nockenlaufbahnen in der Hubkontur und/oder in der Phasenlage unterscheiden können.From the publication DE 42 30 877 is such a device is known in which a cam carrier is arranged rotationally fixed and axially displaceable on a base camshaft. The cam carrier consists of a tubular support on which at least one cam is arranged, in which emerge from a common base circle axially offset several different cam tracks. By the axial displacement of the cam carrier on the base camshaft a gas exchange valve is actuated by the differently shaped cam tracks, wherein the cam tracks may differ in the Hubkontur and / or in the phase position.

Aus der Druckschrift DE 101 48 243 ist eine Weiterbildung dieser Vorrichtung beschrieben, wobei offenbart ist, dass die Grundnockenwelle und der Nockenträger durch eine axial verlaufende Vielzahl- Verzahnung miteinander verbunden sind, wobei die Nockenwelle eine Außenverzahnung und der Nockenträger eine Innenverzahnung aufweisen.From the publication DE 101 48 243 a development of this device is described, wherein it is disclosed that the base camshaft and the cam carrier are interconnected by an axially extending plurality of teeth, the camshaft having an external toothing and the cam carrier having an internal toothing.

Zudem ist in der Druckschrift beschrieben, dass auf dem Nockenträger zum Betätigen zweier einlassseitigen Gaswechselventile eines Zylinders zwei Nocken angeordnet sind, wobei die zwei Nocken jeweils zwei Kurvenbahnen aufweisen. Die Nockenwelle und ein Nockenträger sind dabei durch einen Lagerblock gelagert, der der Nockenträger zwischen den zwei Nocken umfasst.moreover is described in the document that on the cam carrier to Actuate two inlet-side gas exchange valves of a cylinder two cams are arranged, wherein the two cams each have two curved paths exhibit. The camshaft and a cam carrier are by a Bearing block stored, which is the cam carrier between the two cams includes.

Der Erfindung liegt die Aufgabe zugrunde den Ventiltrieb einer Brennkraftmaschine gemäß dem Oberbegriff des Patentanspruches 1 anzugeben, bei dem die Lagerung der Nockenwelle und des Nockenträgers verbessert ausgebildet ist, wobei insbesondere Verschleißerscheinungen beim Betrieb des Ventiltriebes vermieden werden.Of the Invention is the object of the valve train of an internal combustion engine according to the generic term specify of the claim 1, wherein the storage of the camshaft and the cam carrier is formed improved, in particular wear and tear be avoided during operation of the valve train.

Diese Aufgabe wird erfindungsgemäß durch die Merkmal im Kennzeichen des Patentanspruchs 1 gelöst, wonach in dem Lagerblock eine ein Radiallager bildende Gleitfläche ausgebildet ist. In der Gleitfläche ist eine radial umlaufende Nut ausgebildet, die mit einer Schmiermittelzuführung der Brennkraftmaschine verbunden ist.These The object is achieved by the Feature solved in the characterizing part of claim 1, wherein in the bearing block a sliding bearing surface forming a radial bearing is formed. In the sliding surface is a radially encircling groove formed with a lubricant supply of the Internal combustion engine is connected.

In einer vorteilhaften Weiterbildung der Erfindung ist vorgesehen, dass in dem Lagerblock in der Gleitfläche des Radiallagers eine radial umlaufende Nut ausgebildet ist. Diese radial umlaufende Nut ist mit einer Schmiermittelzuführung des Schmiermittelkreislaufes der Brennkraftmaschine verbunden.In an advantageous embodiment of the invention is provided that in the bearing block in the sliding surface of the radial bearing a radial circumferential groove is formed. This radial circumferential groove is with a lubricant supply the lubricant circuit of the internal combustion engine connected.

Auf beiden Seiten der radial umlaufenden Nut wird der Übergang zur Gleitfläche von einer Schrägfläche gebildet, wodurch ein Abstreifen des Schmiermittelfilmes beim axialen verschieben des Nockenträgers vermieden wird.On both sides of the radial circumferential groove becomes the transition to the sliding surface formed by an oblique surface, whereby a stripping of the lubricant film in the axial move of the cam carrier is avoided.

In einer nächsten vorteilhaften Weiterbildung der Erfindung ist vorgesehen, dass der Lagerblock mit der radial umlaufende Nut und den Schrägflächen in einem Metallgießverfahren hergestellt wird.In one next advantageous development of the invention is provided that the Bearing block with the radial circumferential groove and the inclined surfaces in a metal casting process will be produced.

Alternativ wird die radial umlaufende Nut zusammen mit den Schrägflächen nach dem Herstellen des Lagerblockes, bzw. der den Lagerblock bildenden Bauteile, durch einen spänenden Arbeitsgang in dem Lagerblock ausgearbeitet.alternative the radially encircling groove along with the inclined surfaces is after the production of the bearing block, or the bearing block forming Components, by a spänenden Task worked out in the warehouse block.

Die Breite der Lagerblöcke wird abhängig vom verwendeten Material und von den bei Betrieb der Brennkraftmaschine auftretenden Kräften bestimmt. Um die durch die radial umlaufenden Nut fehlende Fläche der Gleitfläche auszugleichen sowie für eine verbesserte Führung des axial verschiebbaren Nockenträgers ist der Lagerblock axial mit einer größeren Breite ausgebildet.The Width of the bearing blocks depends on used material and by the operation of the internal combustion engine occurring forces certainly. To the missing through the radial circumferential groove surface of the sliding surface balance as well as for one improved leadership of the axially displaceable cam carrier, the bearing block is axial with a larger width educated.

Die Brennkraftmaschine ist mit einem einen Leiterrahmen tragenden Zylinderkopf ausgebildet. Dadurch wird eine Hälfte des Lagerblocks von dem Zylinderkopf gebildet, während die andere Hälfte des Lagerblocks von dem Leiterrahmen gebildet wird.The Internal combustion engine is with a ladder frame bearing cylinder head educated. This will be a half of the bearing block formed by the cylinder head, while the other half of the bearing block is formed by the lead frame.

Für die mindestens zwei Nocken des Nockenträgers ist vorgesehen, dass jeder Nocken mindestens zwei unterschiedliche Nockenlaufbahnen aufweist, wodurch ein Gaswechselventil durch das axiale verschieben des Nockenträgers unterschiedlich betätigt wird.For the least two cams of the cam carrier It is envisaged that each cam at least two different Has cam tracks, whereby a gas exchange valve by the axial move the cam carrier operated differently becomes.

Durch den erfindungsgemäßen Ventiltrieb einer Brennkraftmaschine, bei dem der Lagerblock die Funktion eines Radiallager übernimmt, ist eine zuverlässige Schmiermittelversorgung gewährleistet, wodurch Verschleißerscheinungen durch das axiale verschieben der Nockenträger beim Betrieb der Ventiltriebs vermieden werden.By the valve gear according to the invention an internal combustion engine, wherein the bearing block has the function of a Radial bearing takes over, is a reliable one Ensures lubricant supply, causing signs of wear by the axial displacement of the cam carrier during operation of the valve train be avoided.

Im folgenden ist ein erfindungsgemäßer Ventiltrieb einer Brennkraftmaschine anhand von einem Ausführungsbeispiel im Zusammenhang mit drei Figuren dargestellt und erläutert.in the The following is an inventive valve train an internal combustion engine based on an embodiment in connection illustrated and explained with three figures.

Es zeigen:It demonstrate:

1 die Darstellung einer Nockenwelle und eines Nockenträgers, wobei der Nockenträger zur Lagerung von einem Lagerblock umfasst ist, 1 the representation of a camshaft and a cam carrier, wherein the cam carrier is included for storage by a bearing block,

2 die Darstellung des Lagerblocks mit der Gleitfläche ohne Nockenwelle und ohne Nockenträger, 2 the representation of the bearing block with the sliding surface without camshaft and without cam carrier,

3 die Schnittdarstellung durch den eine radial umlaufende Nut aufweisenden Lagerblock ohne Nockenwelle und ohne Nockenträger. 3 the sectional view through a radially circumferential groove having bearing block without camshaft and without cam carrier.

Eine vierzylindrige Brennkraftmaschine mit zwei obenliegenden Nockenwellen zum Antrieb eines Kraftfahrzeuges ist mit einer Vorrichtung zum Verstellen des Hubes und der Öffnungszeiten der einlassseitigen Gaswechselventile ausgestattet. Die Vorrichtung besteht aus vier Nockenträgern, die auf der die einlassseitigen Gaswechselventile betätigenden Nockenwelle drehfest und axial verschiebbar angeordnet sind. Dabei ist jeder Nockenträger genau einem Zylinder zugeordnet, wobei jeder Zylinder der Brennkraftmaschine einlassseitig zwei Gaswechselventile aufweist. Entsprechend sind auf jedem Nockenträger zwei Nocken ausgebildet, wobei jeder Nocken ein einlassseitiges Gaswechselventil betätigt. Jeder der zwei Nocken weist jeweils zwei sich unterscheidende Nockenlaufbahnen auf, die aus einem gemeinsamen Grundkreis axial versetzt aus dem Nocken hervorgehen.A four-cylinder internal combustion engine with two overhead camshafts to drive a motor vehicle is equipped with a device for adjusting the stroke and the opening times the inlet-side gas exchange valves equipped. The device consists of four cam carriers, acting on the inlet side gas exchange valves Camshaft rotationally fixed and are arranged axially displaceable. there is every cam carrier assigned to exactly one cylinder, each cylinder of the internal combustion engine On the inlet side has two gas exchange valves. Corresponding on each cam carrier formed two cams, each cam is an inlet side Gas exchange valve actuated. Everyone the two cams each have two differing cam tracks on, the axially offset from a common base circle from the Cams emerge.

Die die Drehfestigkeit bei gleichzeitiger axialer Verschiebbarkeit ermöglichende Verbindung zwischen der Nockenwelle und dem Nockenträger besteht in einer Verzahnung, die auf der Nockenwelle als Außenverzahnung und in dem Nockenträger als Innenverzahnung ausgebildet ist.The the torsional strength with simultaneous axial displacement enabled There is a connection between the camshaft and the cam carrier in a gearing on the camshaft as external gearing and in the cam carrier is designed as internal toothing.

Zum axialen Verschieben ist an beiden Seiten der Nockenträger jeweils ein Schneckentrieb ausgebildet, in dem als Vertiefung eine Kurvenbahn ausgebildet ist. Die Kurvenbahnen der zwei Schneckentriebe eines Nockenträgers sind dabei zueinander spiegelbildlich ausgebildet, wodurch das axiale Verschieben des Nockenträgers in beide Richtung möglich ist.To the axial displacement is on both sides of the cam carrier respectively formed a worm drive, formed in the recess as a curved path is. The cam tracks of the two worm gears of a cam carrier are thereby mirror images of each other, whereby the axial displacement of the cam carrier possible in both directions is.

Das axiale Verschieben der Nockenträger erfolgt durch radial zur Nockenwelle angeordnete Stellglieder, die als elektromagnetische Ventile ausgebildet sind, und die jeweils aus einem Betätigungsstift und aus zwei Elektromagneten bestehen. Die Stellglieder sind fest mit dem Zylinderkopf der Brennkraftmaschine verbunden. Durch die Elektromagneten kann der Betätigungsstift ausgefahren und zurückgezogen werden. Im ausgefahrenen Zustand greift der Betätigungsstift in die die Kurvenbahn bildende Vertiefung eines Schneckentriebes, wobei der Nockenträger durch die Drehung der Nockenwelle beim Betrieb der Brennkraftmaschine axial verschoben wird.The axial displacement of the cam carrier takes place by radially arranged to the camshaft actuators, the are designed as electromagnetic valves, and each from an actuating pin and consist of two electromagnets. The actuators are fixed with connected to the cylinder head of the internal combustion engine. Through the electromagnet can the actuating pin extended and withdrawn become. In the extended state, the actuating pin engages in the curved path forming depression of a worm drive, wherein the cam carrier through the rotation of the camshaft during operation of the internal combustion engine is moved axially.

Die jeweils zwei Nockenlaufbahnen der zwei Nocken eines Nockenträgers sind in der Form unterschiedlich ausgebildet, dass eine Nockenlaufbahn eine kleine Hubhöhe des Gaswechselventils und die andere Nockenlaufbahn eine große Hubhöhe des Gaswechselventils bewirkt. Die Nockenlaufbahn mit der kleinen Hubhöhe wird bei Motordrehzahlen unterhalb 2500 Umdrehungen pro Minute geschaltet, die Nockenlaufbahn mit der großen Hubhöhe wird bei Motordrehzahlen oberhalb 2500 Umdrehungen pro Minute geschaltet.The each two cam tracks of the two cams of a cam carrier are formed differently in the form that a cam track a small lifting height the gas exchange valve and the other cam track a large lifting height of the gas exchange valve causes. The cam track with the small lift height becomes at engine speeds switched below 2500 revolutions per minute, the cam track with the big one Lifting height is switched at engine speeds above 2500 revolutions per minute.

Die 1 zeigt die Darstellung eines Nockenträgers 2, die drehfest und axial verschiebbar auf der Nockenwelle 1 angeordnet ist, sowie einen der Nockenträger 2 umfassenden Lagerblock 3, der zwischen den zwei Nocken 5 und 6 mit den jeweils zwei unterschiedlichen Nockenlaufbahen 5.1, 5.2, 6.1 und 6.2 angeordnet ist.The 1 shows the representation of a cam carrier 2 , the rotationally fixed and axially displaceable on the camshaft 1 is arranged, as well as one of the cam carrier 2 comprehensive storage block 3 that between the two cams 5 and 6 with each two different Nockenlaufbahen 5.1 . 5.2 . 6.1 and 6.2 is arranged.

Der Lagerblock 3 weist innenseitig eine ein Radiallager bildende Gleitfläche 3.1 auf, die eine reibungsarme Drehung des Nockenträgers 2 in dem Lagerblock 3 ermöglicht. Zur Schmierung des Lagerblocks 3 ist in der Gleitfläche 3.1 eine radial umlaufende Nut 3.2 ausgebildet.The storage block 3 has on the inside a radial bearing forming sliding surface 3.1 on, which is a low-friction rotation of the cam carrier 2 in the storage block 3 allows. For lubrication of the bearing block 3 is in the sliding surface 3.1 a radial circumferential groove 3.2 educated.

Beide Seiten der radial umlaufenden Nut 3.2 weisen einen Übergang zur Gleitfläche 3.1 auf, der als Schrägfläche 3.3 ausgebildet ist. Durch diese Schrägfläche 3.3 wird ein Abstreifen des Ölfilmes beim axialen Verschieben des Nockenträgers 2 vermieden.Both sides of the radial circumferential groove 3.2 have a transition to the sliding surface 3.1 on, as an inclined surface 3.3 is trained. Through this inclined surface 3.3 is a stripping of the oil film during axial displacement of the cam carrier 2 avoided.

Um die durch die radial umlaufenden Nut 3.2 fehlende Fläche der Gleitfläche 3.1 auszugleichen sowie für eine verbesserte Führung des axial verschiebbaren Nockenträgers 2 ist der Lagerblock 3 axial mit einer größeren Breite 19,14 Millimetern ausgebildet.To the through the radial circumferential groove 3.2 missing surface of the sliding surface 3.1 compensate and for an improved guidance of the axially displaceable cam carrier 2 is the storage block 3 axially with a larger width 19 . 14 Millimeters formed.

2 zeigt des Lagerblocks 3 ohne Nockenträger und ohne Nockenwelle, wobei in der Darstellung die Gleitfläche 3.1 des Radiallagers mit der radial umlaufenden Nut 3.2 zu erkennen ist. 2 shows the warehouse block 3 without cam carrier and without camshaft, wherein in the illustration the sliding surface 3.1 the radial bearing with the radial circumferential groove 3.2 can be seen.

Die untere Hälfte des Lagerblocks 3 wird von dem Zylinderkopf 8 der Brennkraftmaschine gebildet, die obere Hälfte des Lagerblocks 3 wird von einem Leiterrahmen 9 gebildet, der eine Zwischenschicht zwischen dem Zylinderkopf 8 und einem Zylinderkopfdeckel bildet, und der alle oberen Lagerblockhälften der zwei Nockenwellen umfasst.The lower half of the bearing block 3 gets from the cylinder head 8th the internal combustion engine formed, the upper half of the bearing block 3 is from a ladder frame 9 formed, which is an intermediate layer between the cylinder head 8th and a cylinder head cover, and which includes all the upper half bearing blocks of the two camshafts.

Die radial umlaufende Nut 3.2 und die Schrägflächen 3.3 werden vorzugsweise bei der Herstellung des Zylinderkopfes 8 und des Leiterrahmens 9 beim Aluminiumguss mit ausgebildet. Alternativ dazu können die radial umlaufende Nut 3.2 zusammen mit den Schrägflächen 3.3 nach dem Gießen des Zylinderkopfes 8 und des Leiterrahmens 9 durch einen spänenden Arbeitsgang ausgearbeitet werden.The radial circumferential groove 3.2 and the sloping surfaces 3.3 are preferably used in the manufacture of the cylinder head 8th and the ladder frame 9 during aluminum casting with trained. Alternatively, the radial circumferential groove 3.2 together with the inclined surfaces 3.3 after casting the cylinder head 8th and the ladder frame 9 be worked out by a peeling operation.

3 zeigt eine Schnittdarstellung durch den Lagerblock 3 ohne Nockenträger und ohne Nockenwelle. Dabei ist eine Ölzuführung 4 dargestellt, durch welche die radial umlaufende Nut 3.2 mit dem Schmiermittelkreislauf der Brennkraftmaschine verbunden ist. 3 shows a sectional view through the bearing block 3 without cam carrier and without camshaft. There is an oil supply 4 represented by which the radial circumferential groove 3.2 is connected to the lubricant circuit of the internal combustion engine.

Durch den erfindungsgemäßen Ventiltrieb der Brennkraftmaschine mit der in der Gleitfläche ausgebildeten axial umlaufenden Nut, die mit den Schmiermittelkreislauf der Brennkraftmaschine verbunden ist, ist ein verschleißarmer Betrieb der Brennkraftmaschine gegeben.By the valve gear of the invention Internal combustion engine with the axially formed in the sliding surface formed in the sliding surface Groove, which is connected to the lubricant circuit of the internal combustion engine is is a low-wearer Operation of the internal combustion engine given.

Claims (6)

Ventiltrieb einer Brennkraftmaschine mit mindestens einer Nockenwelle (1), auf der mindestens ein Nockenträger (2) drehfest und axial verschiebbar angeordnet ist, wobei die mindestens eine Nockenwelle (1) durch einen den mindestens einen Nockenträger (2) umfassenden Lagerblock (3) gelagert ist, dadurch gekennzeichnet, dass in dem Lagerblock (3) eine ein Radiallager bildende Gleitfläche (3.1) ausgebildet ist, dass in der Gleitfläche (3.1) eine radial umlaufende Nut (3.2) ausgebildet ist, und dass die radial umlaufende Nut (3.2) mit einer Schmiermittelzuführung (4) der Brennkraftmaschine verbunden ist.Valve train of an internal combustion engine with at least one camshaft ( 1 ), on which at least one cam carrier ( 2 ) is arranged rotationally fixed and axially displaceable, wherein the at least one camshaft ( 1 ) by a the at least one cam carrier ( 2 ) comprehensive storage block ( 3 ), characterized in that in the storage block ( 3 ) a sliding surface forming a radial bearing ( 3.1 ) is formed such that in the sliding surface ( 3.1 ) a radially encircling groove ( 3.2 ) is formed, and that the radially encircling groove ( 3.2 ) with a lubricant supply ( 4 ) of the internal combustion engine is connected. Ventiltrieb nach Anspruch 1, dadurch gekennzeichnet, dass auf beiden Seiten der radial umlaufenden Nut (3.2) der Übergang zur Gleitfläche (3.1) von einer Schrägfläche (3.3) gebildet wird.Valve gear according to claim 1, characterized in that on both sides of the radial circumferential groove ( 3.2 ) the transition to the sliding surface ( 3.1 ) of an inclined surface ( 3.3 ) is formed. Ventiltrieb nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Lagerblock (3) mit der radial umlaufende Nut (3.2) und den Schrägflächen (3.3) in einem Metallgießverfahren hergestellt ist.Valve gear according to claim 1 or 2, characterized in that the bearing block ( 3 ) with the radial circumferential groove ( 3.2 ) and the inclined surfaces ( 3.3 ) is produced in a metal casting process. Ventiltrieb nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die radial umlaufende Nut (3.2) und die Schrägflächen (3.3) durch einen spänenden Arbeitsgang in dem Lagerblock (3) hergestellt sind.Valve gear according to claim 1 or 2, characterized in that the radially encircling groove ( 3.2 ) and the inclined surfaces ( 3.3 ) by a peeling operation in the storage block ( 3 ) are made. Ventiltrieb nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Brennkraftmaschine einen Zylinderkopf (8) und einen Leiterrahmen (9) aufweist, und dass eine Hälfte des Lagerblocks (3) von dem Zylinderkopf (8) gebildet wird, und dass die andere Hälfte des Lagerblocks (3) von dem Leiterrahmen (9) gebildet wird.Valve gear according to one of the preceding claims, characterized in that the internal combustion engine a cylinder head ( 8th ) and a lead frame ( 9 ), and that one half of the bearing block ( 3 ) of the cylinder head ( 8th ) is formed, and that the other half of the bearing block ( 3 ) of the lead frame ( 9 ) is formed. Ventiltrieb nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass jeder der mindestens zwei Nocken (5, 6) des Nockenträgers (3) mindestens zwei unterschiedliche Nockenlaufbahnen (5.1, 5.2, 6.1, 6.2) aufweist.Valve gear according to one of the preceding claims, characterized in that each of the at least two cams ( 5 . 6 ) of the cam carrier ( 3 ) at least two different cam tracks ( 5.1 . 5.2 . 6.1 . 6.2 ) having.
DE102004021376A 2004-04-30 2004-04-30 Valve train for internal combustion engine, has sliding surface forming radial bearing and formed in bearing block, and radially rotating nut connected with lubricant e.g. oil, supply of internal combustion engine Withdrawn DE102004021376A1 (en)

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WO2007104287A2 (en) * 2006-03-15 2007-09-20 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Variable valve drive for an internal combustion engine
CN100582442C (en) * 2006-08-07 2010-01-20 奇瑞汽车股份有限公司 Variable valve set in automobile engine
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DE102007010148A1 (en) * 2007-03-02 2008-09-04 Audi Ag Valve gear for internal combustion engine, includes bearing which can be slid along cam shaft with cam carriers, relative to engine casing
WO2008107106A1 (en) * 2007-03-02 2008-09-12 Audi Ag Valve drive for gas exchange valves of an internal combustion engine, comprising an axially movable bearing
CN101595281B (en) * 2007-03-02 2012-06-20 奥迪股份公司 Valve drive for gas exchange valves of an internal combustion engine, comprising an axially movable bearing
DE102007024600A1 (en) 2007-05-25 2008-11-27 Schaeffler Kg Operating device for controlling stroke variable valve gear of internal combustion engine, has latching element stressing actuator pin supporting surface by force in extending direction of pin in operating position of pin
DE102007024598A1 (en) 2007-05-25 2008-11-27 Schaeffler Kg Regulation device has housing and controllable holding and release device to hold actuator pin in retaining position and to release actuator pin from retaining position
DE102007027979A1 (en) * 2007-06-19 2009-01-02 Audi Ag Valve drive for gas exchange valves of internal combustion engine, has camshaft, two cam pieces and holders, which are integrally formed on upper part of two-piece cylinder head housing
DE102007027979B4 (en) * 2007-06-19 2015-07-23 Audi Ag Valve train for gas exchange valves of an internal combustion engine with camshaft tunnel bearings
DE102008020892A1 (en) 2008-04-25 2009-10-29 Schaeffler Kg Adjusting device for adjusting variable-lift valve drive of internal combustion engine, has controlling mechanism controllably transferring stop valve in retracting direction of actuating pin to release actuating pin from holding position
DE102008020893A1 (en) 2008-04-25 2009-10-29 Schaeffler Kg Electromagnetic adjusting device for controlling stroke-variable valve impulse of internal-combustion engine of motor vehicle, has diagnostic current circuit closed in one of positions by contact of armature with contact element
DE102009010949A1 (en) 2009-02-27 2010-09-02 Schaeffler Technologies Gmbh & Co. Kg Electromagnetic actuator
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DE202009015466U1 (en) 2009-02-27 2010-03-18 Schaeffler Kg Electromagnetic actuator
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DE102009015486A1 (en) 2009-03-28 2010-09-30 Schaeffler Technologies Gmbh & Co. Kg Electromagnetic actuator comprises housing with electrically energized magnetic coil device, and magnetic coil device generates magnetic field, where stationary core area is commonly assigned to permanent magnets
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DE102009030375A1 (en) 2009-06-25 2010-12-30 Schaeffler Technologies Gmbh & Co. Kg Electromagnetic control device has housing and actuator pins, which are displaced between retracted rest position in housing and working position extended from housing independent of each other
DE102009053121A1 (en) 2009-11-13 2011-05-19 Schaeffler Technologies Gmbh & Co. Kg Electromagnetic actuating device for controlling stroke-variable valve drive of internal-combustion engine, has locking pins subjected with force by magnetic circuit in electromagnet in extending direction for blocking latch
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CN102235189A (en) * 2010-05-04 2011-11-09 Dr.Ing.h.c.F.保时捷股份公司 Internal combustion engine
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CN103370501A (en) * 2011-02-19 2013-10-23 大众汽车有限公司 Activation module for at least one gas exchange valve of an internal combustion engine
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WO2013186054A1 (en) * 2012-06-15 2013-12-19 Thyssenkrupp Presta Teccenter Ag Method for material-removing working of an adjustable camshaft and arrangement for carrying out the method
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JP2014152654A (en) * 2013-02-06 2014-08-25 Mazda Motor Corp Valve gear for engine
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