EP1389266B1 - Valvegear mechanism for an internal combustion engine - Google Patents

Valvegear mechanism for an internal combustion engine Download PDF

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Publication number
EP1389266B1
EP1389266B1 EP02732620A EP02732620A EP1389266B1 EP 1389266 B1 EP1389266 B1 EP 1389266B1 EP 02732620 A EP02732620 A EP 02732620A EP 02732620 A EP02732620 A EP 02732620A EP 1389266 B1 EP1389266 B1 EP 1389266B1
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EP
European Patent Office
Prior art keywords
valve
stroke
piston
cylinder head
tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02732620A
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German (de)
French (fr)
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EP1389266A1 (en
Inventor
Adolf Fischer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Publication date
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Publication of EP1389266A1 publication Critical patent/EP1389266A1/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
    • F01L13/0063—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • 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
    • 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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • 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
    • F01L13/0021—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 by modification of rocker arm ratio
    • 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
    • F01L13/0063—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F01L2013/0068—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/1828—Cam, lever, and slide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Definitions

  • the invention relates to a method for measuring and / or adjusting a valve train device for an internal combustion engine, which comprises a camshaft in a separate cylinder head of the internal combustion engine for the stroke control of a gas exchange valve by means of an intermediate finger lever, in the cylinder head on a reciprocating piston of a hydraulic valve clearance compensation element is mounted.
  • valve train devices with variable-displacement gas exchange valves
  • the valve clearance compensation elements are to be supplied with pressure oil via the associated lines in the separate cylinder head for play-free surface closure of all relevant contact surfaces in the valve train.
  • the JP-A-5 9218316 discloses a valve drive device for an internal combustion engine, which comprises a camshaft in a separate cylinder head of the internal combustion engine for stroke control of a gas exchange valve by means of an intermediate finger lever, which is mounted in the cylinder head on a liftable piston of a hydraulic valve clearance compensation element, wherein the piston Device has to attack a tool for a mechanical lifting operation for play-free surface closure of contact surfaces of the finger lever and a further valve train element at hydraulically pressure-free valve clearance compensation element.
  • a valve drive device for an internal combustion engine which comprises a camshaft in a separate cylinder head of the internal combustion engine for the stroke control of a gas exchange valve by means of an intermediate finger lever which is mounted on the cylinder head on a support.
  • a disadvantage of the prior art is for a measurement of the valve train at the end of the valve train assembly of a mass produced cylinder head the handling of the amount of oil present in a cylinder head, which is to be applied completely for a clean further work on the cylinder head.
  • the invention has for its object to show for measuring and / or adjustment of a generic valve train device supported on a hydraulic valve play compensation element drag lever a method that allows a perfect, backlash-free surface closure between contact surfaces cooperating actuators of a gas exchange valve without hydraulic pressurization of the valve lash adjusters.
  • the advantage of the invention is that with the inventive method for measuring and adjusting the valve train device the cylinder head no pressure oil must be supplied, the measurement and adjustment is done in a sense with a dry cylinder head. In the case of a standard measurement and adjustment thus eliminating a separate pressure oil system. It is also advantageous that the cylinder head is supplied to the other processing stations of the series oil-free.
  • the tool can engage a joint ball provided on the piston for the finger follower in the transition region to a cylindrical portion of the piston.
  • the piston is equipped with a separate means for positive and / or non-positive connection with the tool.
  • the piston of a partially filled with oil deliverable valve clearance compensation element between a guide portion and a rocker arm condyle an outer circumferential groove for engagement of a tool with fork-like end portion. This arrangement is advantageous for a low profile valve lash adjuster.
  • the piston is actuated in the stroke direction by a translationally or rotationally or pivotally acting tool, wherein the respective tool is subjected to force to maintain the surface closure between the valve drive side contact surfaces.
  • the inventively designed piston of a hydraulic valve clearance compensation element - HVA - finds in a further embodiment of the invention preferably use for a variable displacement gas valve adjustable, with a roller equipped with a rocker arm with a Leerhubkurve and a lift curve comprehensive control of a against the action of a return spring of the Camshaft actuated pivot lever cooperates, the respective stroke variation corresponding pivot output position is controlled / regulated adjustable.
  • a valve train device with variable displacement gas exchange valve is, for example, in the DE 199 13 742 A1 shown and described.
  • a valve train device 1 for an internal combustion engine comprises in a separate cylinder head 2 a camshaft 3 for the stroke control of a gas exchange valve 4 by means of an interposed cam follower 5, which is mounted in the cylinder head 2 on a liftable piston 6 of a hydraulic valve clearance compensation element - HVA - 7 ,
  • the piston 6 of the HVA 7 has means 8 for attacking a tool 9 for a mechanical lifting operation for backlash-free surface contact surfaces 10, 11 of the finger lever 5 and another valve drive element 12 at hydraulic depressurized valve clearance compensation element or HVA 7.
  • the piston 6 of the HVA 7 is equipped with a separate device 8 for positive and / or non-positive connection with the tool 9.
  • a translationally acting according to arrow A tool 9 may be provided or else a rotatably or pivotally acting tool.
  • the respective tool 9 is subjected to a force by means of a tension spring 16.
  • valve drive device 1 comprises a variably variable gas exchange valve 4, wherein a equipped with a roller 17 rocker arm 5 cooperates with a Leerhubkurve 11 and lift curve 18 comprehensive control path 19 of an actuated against the action of a return spring 20 of the camshaft 3 pivot lever 21, the respective stroke variation corresponding pivot output position by means of a control device 25 is controlled / regulated adjustable.
  • the documentation of the valve strokes takes place only after a predetermined running time of the valve train device 1.
  • the drag lever is exchanged for this gas exchange valve with another classified drag lever 5.

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

Abstract

A valve gear mechanism for an internal combustion engine includes a camshaft in a separate cylinder head for controlling the stroke of a gas shuttle valve by means of an interposed rocker arm, which is mounted in the cylinder head of a piston that performs a lifting motion of a hydraulic valve-play compensation element. The aim of the invention is to achieve a play-free surface liaison of mechanical origin between the actuating elements of the gas shuttle valve. To achieve this, the piston of the hydraulic compensation element has a device that acts on an instrument for mechanically actuating a lifting stroke in order to achieve a play-free surface liaison of the contract surfaces of the rocker arm and an additional valve gear element, while the valve-play compensation element is maintained hydraulically without pressure.

Description

Die Erfindung bezieht sich auf ein Verfahren zum Vermessen und/oder Justieren einer Ventiltrieb-Vorrichtung für eine Brennkraft-maschine, die in einem gesonderten Zylinderkopf der Brennkraftmaschine eine Nockenwelle umfasst zur Hubsteuerung eines Gaswechselventils mittels eines zwischengeschalteten Schlepphebels, der im Zylinderkopf auf einem hubbeweglichen Kolben eines hydraulischen Ventilspiel-Ausgleichselementes gelagert ist.The invention relates to a method for measuring and / or adjusting a valve train device for an internal combustion engine, which comprises a camshaft in a separate cylinder head of the internal combustion engine for the stroke control of a gas exchange valve by means of an intermediate finger lever, in the cylinder head on a reciprocating piston of a hydraulic valve clearance compensation element is mounted.

Insbesondere bei Ventiltrieb-Vorrichtungen mit hubvariablen Gaswechselventilen ist es insbesondere aus funktionellen Gründen wünschenswert, den Ventilhub eines Gaswechselventils je Zylinder bzw. die Ventilhübe der entsprechenden Gaswechselventile über sämtliche Zylinder messen zu können. Bei einer gattungsgemäßen Ventiltrieb-Vorrichtung mit einem auf einem hydraulischen Ventilspiel-Ausgleichselement gelagerten Schlepphebel sind zum spielfreien Flächenschluss sämtlicher relevanter Kontaktflächen im Ventiltrieb die Ventilspiel-Ausgleichselemente über die zugeordneten Leitungen im gesonderten Zylinderkopf mit Drucköl zu versorgen.Especially with valve train devices with variable-displacement gas exchange valves, it is particularly desirable for functional reasons to be able to measure the valve lift of a gas exchange valve per cylinder or the valve strokes of the corresponding gas exchange valves across all cylinders. In a generic valve train device with a drag lever mounted on a hydraulic valve clearance compensation element, the valve clearance compensation elements are to be supplied with pressure oil via the associated lines in the separate cylinder head for play-free surface closure of all relevant contact surfaces in the valve train.

Die JP-A-5 9218316 , von der vorliegende Erfindung ausgeht, offenbart eine Ventiltriebsvorrichtung für eine Brennkraftmaschine, die in einem gesonderten Zylinderkopf der Brennkraftmaschine eine Nockenwelle umfasst zur Hubsteuerung eines Gaswechselventils mittels eines zwischengeschalteten Schlepphebels, der im Zylinderkopf auf einem hubbeweglichen Kolben eines hydraulischen Ventilspielausgleichselementes gelagert ist, wobei der Kolben eine Einrichtung aufweist zum Angriff eines Werkzeuges für eine mechanische Hubbetätigung zum spielfreien Flächenschluss von Kontaktflächen des Schlepphebels und eines weiteren Ventiltriebselementes bei hydraulisch drucklos gehaltenem Ventilspielausgleichselement.The JP-A-5 9218316 , Starting from the present invention, discloses a valve drive device for an internal combustion engine, which comprises a camshaft in a separate cylinder head of the internal combustion engine for stroke control of a gas exchange valve by means of an intermediate finger lever, which is mounted in the cylinder head on a liftable piston of a hydraulic valve clearance compensation element, wherein the piston Device has to attack a tool for a mechanical lifting operation for play-free surface closure of contact surfaces of the finger lever and a further valve train element at hydraulically pressure-free valve clearance compensation element.

Weiter ist aus der deutschen Offenlegungsschrift DE 199 13 742 A1 eine Ventiltriebvorrichtung für eine Brennkraftmaschine bekannt, die in einem gesonderten Zylinderkopf der Brennkraftmaschine eine Nockenwelle umfasst zur Hubsteuerung eines Gaswechselventils mittels eines zwischengeschalteten Schlepphebels, der am Zylinderkopf auf einer Abstützung gelagert ist.Next is from the German patent application DE 199 13 742 A1 a valve drive device for an internal combustion engine is known which comprises a camshaft in a separate cylinder head of the internal combustion engine for the stroke control of a gas exchange valve by means of an intermediate finger lever which is mounted on the cylinder head on a support.

Nachteilig beim Stand der Technik ist für eine Vermessung des Ventiltriebes am Ende der Ventiltriebmontage eines serienmäßig hergestellten Zylinderkopfes das Handling mit der in einem Zylinderkopf vorhandenen Ölmenge, die für ein sauberes Weiterarbeiten am Zylinderkopf restlos auszubringen ist.A disadvantage of the prior art is for a measurement of the valve train at the end of the valve train assembly of a mass produced cylinder head the handling of the amount of oil present in a cylinder head, which is to be applied completely for a clean further work on the cylinder head.

Der Erfindung liegt die Aufgabe zugrunde, zur Vermessung und/oder Justierung einer gattungsgemäßen Ventiltrieb-Vorrichtung mit auf einem hydraulischen Ventilspiel-Ausgleichselement abgestützten Schlepphebel ein Verfahren aufzuzeigen, das ohne hydraulische Druckbeaufschlagung der Ventilspielausgleichselemente einen einwandfreien, spielfreien Flächenschluss zwischen Kontaktflächen zusammenwirkender Betätigungselemente eines Gaswechselventils ermöglicht.The invention has for its object to show for measuring and / or adjustment of a generic valve train device supported on a hydraulic valve play compensation element drag lever a method that allows a perfect, backlash-free surface closure between contact surfaces cooperating actuators of a gas exchange valve without hydraulic pressurization of the valve lash adjusters.

Diese Aufgabe ist mit dem Patentanspruch 1 dadurch gelöst, dass der gesonderte Zylinderkopf in einer Vorrichtung ohne Druckanschluss für das Ventilspielausgleichselement positioniert und fixiert wird, wobei der Kolben des hydraulischen Ventilspielausgleichselementes zur Vermessung und/oder Justierung der Ventiltriebsvorrichtung über das Werkzeug mechanisch hubbetätigt wird.This object is achieved with the patent claim 1, characterized in that the separate cylinder head is positioned and fixed in a device without pressure connection for the valve clearance compensation element, wherein the piston of the hydraulic valve clearance compensation element for measuring and / or adjustment of the valve drive device via the tool is mechanically stroke-actuated.

Der Vorteil der Erfindung ist, dass mit dem erfindungsgemäßen Verfahren zur Vermessung und Justierung der Ventiltrieb-Vorrichtung dem Zylinderkopf kein Drucköl zugeführt werde muss, die Vermessung und Justierung erfolgt gewissermaßen mit trockenem Zylinderkopf. Im Falle einer serienmäßigen Vermessung und Justierung entfällt damit eine gesonderte Druckölanlage. Weiter vorteilhaft ist, dass der Zylinderkopf den weiteren Bearbeitungsstationen der Serie ölfrei zugeführt wird.The advantage of the invention is that with the inventive method for measuring and adjusting the valve train device the cylinder head no pressure oil must be supplied, the measurement and adjustment is done in a sense with a dry cylinder head. In the case of a standard measurement and adjustment thus eliminating a separate pressure oil system. It is also advantageous that the cylinder head is supplied to the other processing stations of the series oil-free.

Gemäß der Erfindung kann das Werkzeug an einer am Kolben vorgesehenen Gelenkkugel für den Schlepphebel angreifen und zwar im Übergangsbereich zu einem zylindrischen Abschnitt des Kolbens. In Ausgestaltung der Erfindung wird weiter vorgeschlagen, dass der Kolben mit einer gesonderten Einrichtung zur form- und/oder kraftschlüssigen Verbindung mit dem Werkzeug ausgerüstet ist. Als bevorzugte Ausgestaltung der gesonderten Einrichtung weist der Kolben eines mit Öl teilgefüllt anlieferbaren Ventilspiel-Ausgleichselementes zwischen einem Führungsabschnitt und einem Schlepphebel-Gelenkkopf eine Außen-Umfangsnut auf zum Eingriff eines Werkzeuges mit gabelartigem Endabschnitt. Diese Anordnung ist für ein niedrigbauendes Ventilspiel-Ausgleichselement vorteilhaft.According to the invention, the tool can engage a joint ball provided on the piston for the finger follower in the transition region to a cylindrical portion of the piston. In an embodiment of the invention it is further proposed that the piston is equipped with a separate means for positive and / or non-positive connection with the tool. As a preferred embodiment of the separate device, the piston of a partially filled with oil deliverable valve clearance compensation element between a guide portion and a rocker arm condyle an outer circumferential groove for engagement of a tool with fork-like end portion. This arrangement is advantageous for a low profile valve lash adjuster.

In weiterer Ausgestaltung der Erfindung ist der Kolben in Hubrichtung von einem translatorisch oder rotatorisch bzw. schwenkbeweglich wirkenden Werkzeug betätigt, wobei zur Aufrechterhaltung des Flächenschlusses zwischen den ventiltriebseitigen Kontaktflächen das jeweilige Werkzeug kraftbeaufschlagt ist.In a further embodiment of the invention, the piston is actuated in the stroke direction by a translationally or rotationally or pivotally acting tool, wherein the respective tool is subjected to force to maintain the surface closure between the valve drive side contact surfaces.

Der erfindungsgemäß gestaltete Kolben eines hydraulischen Ventilspiel-Ausgleichselementes - HVA - findet in weiterer Ausgestaltung der Erfindung bevorzugt Verwendung für ein hubvariabel einstellbares Gaswechselventil, wobei ein mit einer Rolle ausgerüsteter Schlepphebel mit einer eine Leerhubkurve und eine Hubkurve umfassenden Steuerbahn eines gegen die Wirkung einer Rückstellfeder von der Nockenwelle betätigten Schwenkhebels zusammenwirkt, dessen der jeweiligen Hubvariation entsprechende Schwenkausgangslage gesteuert/geregelt einstellbar ist. Eine derartige Ventiltrieb-Vorrichtung mit hubvariablem Gaswechselventil ist beispielsweise in der DE 199 13 742 A1 gezeigt und beschrieben.The inventively designed piston of a hydraulic valve clearance compensation element - HVA - finds in a further embodiment of the invention preferably use for a variable displacement gas valve adjustable, with a roller equipped with a rocker arm with a Leerhubkurve and a lift curve comprehensive control of a against the action of a return spring of the Camshaft actuated pivot lever cooperates, the respective stroke variation corresponding pivot output position is controlled / regulated adjustable. Such a valve train device with variable displacement gas exchange valve is, for example, in the DE 199 13 742 A1 shown and described.

Schließlich ist im letzten Unteranspruch ein Arbeitsverfahren zum Vermessen und/oder Justieren einer Ventiltrieb-Vorrichtung mit einem hubvariabel einstellbaren Gaswechselventil beschrieben.Finally, in the last subclaim a working method for measuring and / or adjusting a valve train device with a variable-displacement adjustable gas exchange valve is described.

Die Erfindung ist anhand eines in der Zeichnung dargestellten, bevorzugten Ausführungsbeispiels erläutert. Es zeigt

Figur 1
eine Ventiltrieb-Vorrichtung mit hubvariablem Gaswechselventil mit Schlepphebel,
Figur 2
ein hydraulisches Ventilspiel-Ausgleichselement mit einem erfindungsgemäß gestalteten Kolben zur Schlepphebel-Abstützung.
The invention is explained with reference to a preferred embodiment shown in the drawing. It shows
FIG. 1
a valve train device with variable displacement gas exchange valve with cam follower,
FIG. 2
a hydraulic valve clearance compensation element with an inventively designed piston for finger lever support.

Eine Ventiltrieb-Vorrichtung 1 für eine nicht gezeigte Brennkraftmaschine umfasst in einem gesonderten Zylinderkopf 2 eine Nockenwelle 3 zur Hubsteuerung eines Gaswechselventils 4 mittels eines zwischengeschalteten Schlepphebels 5, der im Zylinderkopf 2 auf einem hubbeweglichen Kolben 6 eines hydraulischen Ventilspiel-Ausgleichselementes - HVA - 7 gelagert ist.A valve train device 1 for an internal combustion engine, not shown, comprises in a separate cylinder head 2 a camshaft 3 for the stroke control of a gas exchange valve 4 by means of an interposed cam follower 5, which is mounted in the cylinder head 2 on a liftable piston 6 of a hydraulic valve clearance compensation element - HVA - 7 ,

Zur Vermessung und/oder Justierung dieser Ventiltrieb-Vorrichtung ohne hydraulische Druckbeaufschlagung des/der HVA 7 zur Erzielung eines einwandfreien spielfreien Flächenschlusses zwischen Betätigungselementen des Gaswechselventiles 4 wird gemäß der Erfindung vorgeschlagen, dass der Kolben 6 des HVA 7 eine Einrichtung 8 aufweist zum Angriff eines Werkzeuges 9 für eine mechanische Hubbetätigung zum spielfreien Flächenschluss von Kontaktflächen 10, 11 des Schlepphebels 5 und eines weiteren Ventiltriebelementes 12 bei hydraulisch drucklos gehaltenem Ventilspiel-Ausgleichselement bzw. HVA 7.For the measurement and / or adjustment of this valve train device without hydraulic pressurization of the HVA 7 to achieve a perfect backlash-free Surface closure between actuators of the gas exchange valve 4 is proposed according to the invention that the piston 6 of the HVA 7 has means 8 for attacking a tool 9 for a mechanical lifting operation for backlash-free surface contact surfaces 10, 11 of the finger lever 5 and another valve drive element 12 at hydraulic depressurized valve clearance compensation element or HVA 7.

Vorzugsweise ist der Kolben 6 des HVA 7 mit einer gesonderten Einrichtung 8 zur form- und/oder kraftschlüssigen Verbindung mit dem Werkzeug 9 ausgerüstet.Preferably, the piston 6 of the HVA 7 is equipped with a separate device 8 for positive and / or non-positive connection with the tool 9.

In bevorzugter Ausgestaltung der Erfindung ist als gesonderte Einrichtung 8 am Kolben 6 eines mit Öl teilgefüllt angelieferten Ventilspiel-Ausgleichselementes bzw. HVA 7 zwischen einem Führungsabschnitt 13 und einem Schlepphebel-Gelenkkopf 14 eine Außen-Umfangsnut 15 vorgesehen zum Eingriff des Werkzeuges 9 mit einem gabelartigen Endabschnitt 9'.In a preferred embodiment of the invention is provided as a separate means 8 on the piston 6 of a part filled with oil supplied valve clearance compensation element or HVA 7 between a guide portion 13 and a rocker joint head 14, an outer circumferential groove 15 for engagement of the tool 9 with a fork-like end portion 9 '.

Für die Betätigung des Kolbens 6 in Hubrichtung kann ein translatorisch gemäß Pfeil A wirkendes Werkzeug 9 vorgesehen sein oder aber auch ein rotatorisch bzw. schwenkbeweglich wirkendes Werkzeug. Zur Aufrechterhaltung des Flächenschlusses bei mechanisch hubbetätigtem Kolben 6 zwischen den ventiltriebseitigen Kontaktflächen 10 und 11 ist das jeweilige Werkzeug 9 mittels einer Zugfeder 16 kraftbeaufschlagt.For the actuation of the piston 6 in the stroke direction, a translationally acting according to arrow A tool 9 may be provided or else a rotatably or pivotally acting tool. To maintain the surface closure in mechanically stroke-actuated piston 6 between the valve drive-side contact surfaces 10 and 11, the respective tool 9 is subjected to a force by means of a tension spring 16.

Wie aus Figur 1 hervorgeht, umfasst die Ventiltrieb-Vorrichtung 1 ein hubvariabel einstellbares Gaswechselventil 4, wobei ein mit einer Rolle 17 ausgerüsteter Schlepphebel 5 mit einer eine Leerhubkurve 11 und Hubkurve 18 umfassenden Steuerbahn 19 eines gegen die Wirkung einer Rückstellfeder 20 von der Nockenwelle 3 betätigten Schwenkhebels 21 zusammenwirkt, dessen der jeweiligen Hubvariation entsprechende Schwenkausgangslage mittels einer Steuereinrichtung 25 gesteuert/geregelt einstellbar ist.How out FIG. 1 It can be seen that the valve drive device 1 comprises a variably variable gas exchange valve 4, wherein a equipped with a roller 17 rocker arm 5 cooperates with a Leerhubkurve 11 and lift curve 18 comprehensive control path 19 of an actuated against the action of a return spring 20 of the camshaft 3 pivot lever 21, the respective stroke variation corresponding pivot output position by means of a control device 25 is controlled / regulated adjustable.

Zum Vermessen und/oder Justieren der Ventiltrieb-Vorrichtung 1 in einem gesonderten Zylinderkopf 2 wird dieser in einer Vorrichtung 22 ohne Druckölanschluss für die HVA 7 bei 23 positioniert und bei 24 fixiert, wobei anschließend die Kolben 6 aller Ausgleichselemente HVA 7 über automatisch zugeführte Werkzeuge 9 mechanisch hubbetätigt werden zum spielfreien Flächenschluss zwischen den Kontaktflächen 10 und 11 und zwar mit gesteuerter Anlagekraft, beispielsweise durch eine Zugfeder 16. Weiter werden alle Schwenkhebel 21 der hubvariablen Ventiltrieb-Vorrichtung 1 über die gemeinsame Steuereinrichtung 25 bezüglich ihrer Schwenkpunkte für einen vorbestimmten Minimalhub aller Gaswechselventile 4 in Position gebracht und anschließend wird die Nockenwelle 3 mit einer in der Vorrichtung 22 angeordneten, nicht gezeigten Antriebseinrichtung gekuppelt und mit einer vorbestimmten Drehzahl angetrieben. Die somit hubbetätigten Gaswechselventile 4 stehen mit Wegaufnehmern 26 in Antriebsverbindung zur Erfassung der Ventilhübe, deren einzelne Werte auf einem Monitor mit vorgegebenen Toleranzband dargestellt und des weiteren dokumentiert werden.For measuring and / or adjusting the valve train device 1 in a separate cylinder head 2, this is positioned in a device 22 without pressure oil connection for the HVA 7 at 23 and fixed at 24, in which case the piston 6 All compensating elements HVA 7 via automatically supplied tools 9 are mechanically actuated for play-free surface closure between the contact surfaces 10 and 11 with a controlled contact force, for example by a tension spring 16. Next all pivot lever 21 of the variable stroke valve drive device 1 via the common control device 25 with respect their pivots for a predetermined minimum stroke of all gas exchange valves 4 are brought into position and then the camshaft 3 is coupled to a device 22 arranged in the drive device, not shown, and driven at a predetermined speed. The hub-operated gas exchange valves 4 are in driving connection with displacement sensors 26 for detecting the valve strokes, whose individual values are displayed on a monitor with a predetermined tolerance band and are further documented.

Die Dokumentation der Ventilhübe erfolgt erst nach einer vorbestimmten Einlaufzeit der Ventiltrieb-Vorrichtung 1. Bei einem außerhalb des Toleranzbandes liegenden Ventilhub wird der Schlepphebel zu diesem Gaswechselventil gegen einen anderen klassifizierten Schlepphebel 5 ausgetauscht.The documentation of the valve strokes takes place only after a predetermined running time of the valve train device 1. When the valve lift is outside the tolerance range, the drag lever is exchanged for this gas exchange valve with another classified drag lever 5.

Claims (5)

  1. A method of measuring and/or adjusting a valve drive for an internal combustion engine,
    the drive being disposed in a separate cylinder head (2) of the engine and comprising a camshaft (3) for controlling the stroke of a gas change valve (4) via an interposed drag lever (5) mounted at one end on the gas change valve (4) whereas the other end is mounted on a reciprocatable piston (6) of a hydraulic valve clearance compensating element (HVA 7) disposed in the cylinder head (2), wherein the piston (6) comprises a device (8) for positive and/or non-positive connection for engaging a tool (9) for mechanical stroke actuation to obtain clearance-free contact between surfaces (10, 11) of the drag lever (5) and an additional valve drive element (12),
    characterised in that the separate cylinder head (2) is positioned and fixed in a device (22) without a pressure connection for the valve clearance compensating element (HVA 7), wherein the piston (6) of the hydraulic valve clearance compensating element (HVA 7), is mechanically reciprocated by the tool (9) for measuring and/or adjusting the valve drive.
  2. A method according to claim 1,
    characterised in that the piston (6) of a valve clearance compensating element (HVA 7) supplied partly filled with oil has a separate device (8) in the form of an outer peripheral groove (15) between a guide portion (13) and a drag-lever joint head (14), for engaging a tool (9) having a forked end portion (9').
  3. A method according to claim 1 or claim 2,
    characterised in that
    - the piston (6) is movable in the stroke direction by a tool (9) acting in translation (arrow A) or in rotation or by pivoting, and
    - the tool (9) is subjected to force (tension spring 16) in order to maintain the contact between the surfaces (10, 11) on the valve drive.
  4. A method according to one or more of claims 1 to 3, characterised by
    - use of an adjustable-stroke gas change valve (4), wherein
    - a drag lever (5) equipped with a roller (17) cooperates with a control path (19) comprising an idle curve (11) and a stroke curve (18) on a drag lever (21) actuated by the camshaft (3) against the action of a return spring (20),
    - the starting position of the drag lever (21) being adjustable in an open or closed loop to correspond to the required variation in stroke.
  5. A method according to claim 4,
    characterised by a working process having the following steps:
    a) the separate cylinder head (2) is positioned (at 23) and fixed (at 24) in a device (22) without a pressure-oil connection,
    b) the pistons (6) of all compensating elements (HVA 7) are mechanically reciprocated by automatically supplied tools (9) to obtain clearance-free contact between the surfaces (10, 11) with a controlled bearing force (tension spring 16),
    c) all pivoted levers (21) of the variable-stroke valve drive device (1) are brought into position by a common control device (25) as regards their pivoted positions in order to obtain a preset minimum stroke of all the gas change valves (4) and
    d) the camshaft (3) is coupled to a drive disposed in the device (22) and driven at a set speed, wherein
    e) at least the valve strokes are detected by displacement transducers (26) connected to the drive of the moving gas change valves (4),
    f) the valve strokes being shown on a monitor having a preset tolerance band and being additionally documented.
EP02732620A 2001-05-23 2002-04-16 Valvegear mechanism for an internal combustion engine Expired - Lifetime EP1389266B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10125082A DE10125082A1 (en) 2001-05-23 2001-05-23 Valve drive device for an internal combustion engine comprises a piston having a device for attaching a tool for mechanical stroke actuation for play-free closing of the contact surfaces of a trailing lever and a valve drive element
DE10125082 2001-05-23
PCT/EP2002/004175 WO2002095193A1 (en) 2001-05-23 2002-04-16 Valvegear mechanism for an internal combustion engine

Publications (2)

Publication Number Publication Date
EP1389266A1 EP1389266A1 (en) 2004-02-18
EP1389266B1 true EP1389266B1 (en) 2009-03-18

Family

ID=7685822

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02732620A Expired - Lifetime EP1389266B1 (en) 2001-05-23 2002-04-16 Valvegear mechanism for an internal combustion engine

Country Status (7)

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US (1) US6959674B2 (en)
EP (1) EP1389266B1 (en)
JP (1) JP3981637B2 (en)
AT (1) ATE426086T1 (en)
DE (2) DE10125082A1 (en)
ES (1) ES2320634T3 (en)
WO (1) WO2002095193A1 (en)

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DE102016015443A1 (en) 2016-12-23 2018-06-28 Dr. Ing. H.C. F. Porsche Ag Method for adjusting the valve clearance on an internal combustion engine
DE102016015443B4 (en) 2016-12-23 2018-10-25 Dr. Ing. H.C. F. Porsche Ag Method for adjusting the valve clearance on an internal combustion engine

Also Published As

Publication number Publication date
JP3981637B2 (en) 2007-09-26
WO2002095193A1 (en) 2002-11-28
DE50213367D1 (en) 2009-04-30
DE10125082A1 (en) 2002-11-28
EP1389266A1 (en) 2004-02-18
US20040168661A1 (en) 2004-09-02
ES2320634T3 (en) 2009-05-27
ATE426086T1 (en) 2009-04-15
US6959674B2 (en) 2005-11-01
JP2004521235A (en) 2004-07-15

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