EP1167701A1 - Internal combustion engine valve lock assembly - Google Patents

Internal combustion engine valve lock assembly Download PDF

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Publication number
EP1167701A1
EP1167701A1 EP01111610A EP01111610A EP1167701A1 EP 1167701 A1 EP1167701 A1 EP 1167701A1 EP 01111610 A EP01111610 A EP 01111610A EP 01111610 A EP01111610 A EP 01111610A EP 1167701 A1 EP1167701 A1 EP 1167701A1
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EP
European Patent Office
Prior art keywords
valve
pressure plate
plate
spring
valve stem
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.)
Granted
Application number
EP01111610A
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German (de)
French (fr)
Other versions
EP1167701B1 (en
Inventor
Wolfgang Semet
Helmut Leyhe
Timo Klees
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
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1167701A1 publication Critical patent/EP1167701A1/en
Application granted granted Critical
Publication of EP1167701B1 publication Critical patent/EP1167701B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/10—Connecting springs to valve members
    • 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

Definitions

  • the invention relates to a valve holder for a lift valve of an internal combustion engine according to the type mentioned in the preamble of claim 1.
  • the invention is based on the German patent application 20 14 575.
  • a valve control assembly for internal combustion engines with an overhead Camshaft shown.
  • the cam of a rotating camshaft is actuated by this arrangement a rocker arm, which in turn on the cylinder head side in a ball joint is stored.
  • the end of the rocker arm facing away from the ball joint side transmits the lifting movement to a side plate via a pressure plate Lift valve.
  • the valve stem of the globe valve is opposed by valve cone elements Spring force held by valve springs that press against the spring plate.
  • the spring plate surrounds the pressure element between the rocker arm and valve stem is arranged radially. Part of the cheeks of the pressure plate are in Closing direction of the globe valve from the hole in the spring plate in which it is arranged is out.
  • a disadvantage of this arrangement is the high design of the valve plate and the Pressure plate and therefore the large moving mass of the valve train.
  • the object of the invention is a flatter design of the valve plate and pressure plate Realize to minimize the moving mass of the valve train, tilting the pressure plate during assembly of the valve train parts and during service work is safely prevented.
  • This object is achieved by the characterizing part of the patent claim 1 solved.
  • This arrangement shortens the overall length of the valve plate in the closing direction of the lift valve optimally, whereby space is gained and the moving Masses in the valve train are reduced. Furthermore, the printing plate falls out prevented by tilting in the hole. Valve train or engine damage that occurs fallen pressure plates can be attributed to the engine interior reliably prevented.
  • the use of the pressure plate as a valve clearance compensation element according to claim 3 provides a cost-effective, easy-to-manufacture and robust balancing solution of the valve clearance.
  • Figure 1 shows a sectional view of a valve holder 1.
  • a pressure plate 6 At the end of the valve stem 2 there is a pressure plate 6.
  • she is in a cylindrical bore 9 arranged coaxially with the conical bore 8, whose inner diameter is larger than the largest inner diameter of the conical Bore 8 is held radially.
  • valve cone elements 3, 3 ' With this engagement results in a positive connection between the valve stem 2 and the valve cone elements 3, 3 'guaranteed.
  • the valve cone elements 3, 3 ' have a conical outer shape. The large outside diameter is on the side of the valve stem end. The valve cone elements 3, 3 'protrude almost up to the height of the valve stem end, but do not touch the pressure plate 6. So is in the assembled valve holder 1 always an annular gap 7 between the Pressure plate 6 and the valve cone elements 3, 3 'available.
  • valve stem 2 When assembling the arrangement, valve stem 2 is inserted into conical bore 8 introduced from the side facing away from the pressure plate 6. Then will the valve disk 4 with a special tool against the spring force of the valve spring 5 pressed so that the valve stem 2 at least by its guide length in the spring plate 4 extends beyond the edge of the bore 9.
  • the two valve cone elements 3, 3 ' inserted into the ring grooves 10, 10' on the valve stem 2. Then the contact pressure of the special tool against the spring force is reduced, so that the valve stem 2 with the two valve cone elements 3, 3 'with their slide the conical outer circumference into the conical bore 8. Due to the The spring force of the valve spring 5 now wedges the valve cone elements 3, 3 'in the conical bore 8.
  • valve cone elements 3, 3 'and the pressure plate 6 reliably prevents this from tipping.
  • the number of annular grooves 10 on the valve stem 2, in which the valve cone elements 3, 3 'engage vary. You can also more than two valve cone elements 3, 3 'can be installed. For simpler and better Assembly of the pressure plate 6 can be a slip chamfer on the cylindrical bore 9 are attached.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

The holder (1) for the valve stem of an internal combustion engine's lift valve has two cone elements(3,3') which extend up to the height of the end of the stem. A pressure plate (6) acting as a valve clearance compensating element bears against the upper end of the valve stem, with the maximum distance between the pressure plate and valve stem being 0.5mm. The pressure plate protrudes above the spring cap (4) in the axial direction.

Description

Die Erfindung betrifft eine Ventilhalterung für ein Hubventil einer Brennkraftmaschine gemäß der im Oberbegriff des Patentanspruchs 1 genannten Art.The invention relates to a valve holder for a lift valve of an internal combustion engine according to the type mentioned in the preamble of claim 1.

Die Erfindung geht von der deutschen Offenlegungsschrift 20 14 575 aus. In dieser ist eine Ventilsteuerungsanordnung für Brennkraftmaschinen mit einer oben liegenden Nockenwelle dargestellt. Der Nocken einer drehenden Nockenwelle betätigt bei dieser Anordnung einen Kipphebel, der seinerseits zylinderkopfseitig in einem Kugelgelenk gelagert ist. Das der Kugelgelenkseite abgewandte Ende des Kipphebels überträgt die Hubbewegung über eine Druckplatte mit seitlichen Wangen auf ein Hubventil. Der Ventilschaft des Hubventils wird von Ventilkegelelementen gegen die Federkraft von Ventilfedern, die gegen den Federteller drücken, in diesem gehalten. Der Federteller umschließt das Druckelement, das zwischen Kipphebel und Ventilschaft angeordnet ist, radial. Ein Teil der Wangen der Druckplatte stehen in Schließrichtung des Hubventils aus der Bohrung im Federteller, in die sie angeordnet ist, heraus.The invention is based on the German patent application 20 14 575. In this is a valve control assembly for internal combustion engines with an overhead Camshaft shown. The cam of a rotating camshaft is actuated by this arrangement a rocker arm, which in turn on the cylinder head side in a ball joint is stored. The end of the rocker arm facing away from the ball joint side transmits the lifting movement to a side plate via a pressure plate Lift valve. The valve stem of the globe valve is opposed by valve cone elements Spring force held by valve springs that press against the spring plate. The spring plate surrounds the pressure element between the rocker arm and valve stem is arranged radially. Part of the cheeks of the pressure plate are in Closing direction of the globe valve from the hole in the spring plate in which it is arranged is out.

Nachteilig bei dieser Anordnung ist die hohe Bauform von dem Ventilteller und der Druckplatte und dadurch bedingt die große bewegte Masse des Ventiltriebs. A disadvantage of this arrangement is the high design of the valve plate and the Pressure plate and therefore the large moving mass of the valve train.

Weiterhin ist allgemein bekannt, dass derartige Druckplatten gleichzeitig als Ventilspielausgleichselemente verwendet werden.Furthermore, it is generally known that pressure plates of this type are used at the same time as valve clearance compensation elements be used.

Aufgabe der Erfindung ist es, eine flachere Bauform von Ventilteller und Druckplatte zur Minimierung der bewegten Masse des Ventiltriebs zu realisieren, wobei ein Verkippen der Druckplatte bei der Montage der Ventiltriebsteile sowie bei Servicearbeiten sicher verhindert ist.The object of the invention is a flatter design of the valve plate and pressure plate Realize to minimize the moving mass of the valve train, tilting the pressure plate during assembly of the valve train parts and during service work is safely prevented.

Diese Aufgabe wird erfindungsgemäß durch das Kennzeichen des Patentanspruchs 1 gelöst. Diese Anordnung verkürzt die Baulänge des Ventiltellers in Schließrichtung des Hubventils optimal, wodurch Bauraum gewonnen wird und die bewegten Massen im Ventiltrieb reduziert sind. Ferner ist ein Herausfallen der Druckplatte durch Verkippen in der Bohrung verhindert. Ventiltriebs- oder Motorschäden, die auf heruntergefallene Druckplatten in den Motorinnenraum zurückzuführen sind, werden zuverlässig verhindert.This object is achieved by the characterizing part of the patent claim 1 solved. This arrangement shortens the overall length of the valve plate in the closing direction of the lift valve optimally, whereby space is gained and the moving Masses in the valve train are reduced. Furthermore, the printing plate falls out prevented by tilting in the hole. Valve train or engine damage that occurs fallen pressure plates can be attributed to the engine interior reliably prevented.

Fertigungstoleranzen für Ventiltriebsbauteile, innerhalb derer ein Verkippen der Druckplatte verhindert ist, sind nach Anspruch 2 fertigungstechnisch einfach einzuhalten.Manufacturing tolerances for valve train components within which a tilting of the Pressure plate is prevented, are easy to maintain according to claim 2 manufacturing technology.

Die Verwendung der Druckplatte als Ventilspielausgleichselement gemäß Anspruch 3 stellt eine kostengünstige, einfach zu fertigende und robuste Lösung zum Ausgleich des Ventilspiels dar.The use of the pressure plate as a valve clearance compensation element according to claim 3 provides a cost-effective, easy-to-manufacture and robust balancing solution of the valve clearance.

Vorteilhaft nach Anspruch 4 wird ein Ausbau oder ein Wechsel der Druckplatte aus dem Federteller erleichtert.Advantageously according to claim 4, an expansion or replacement of the printing plate the spring plate relieved.

Im Folgenden wird die Erfindung anhand eines bevorzugten Ausführungsbeispieles erläutert.

Fig. 1:
Schnittdarstellung in der Hubventilachse einer Ventilhalterung
The invention is explained below on the basis of a preferred exemplary embodiment.
Fig. 1:
Sectional view in the stroke valve axis of a valve holder

Figur 1 zeigt eine Schnittdarstellung einer Ventilhalterung 1. An einem Ventilschaft 2 sind zwei Ventilkegelelemente 3, 3' am Außenumfang des Ventilschaftes 2 angeordnet. Der Ventilschaft 2 und die Ventilkegelelemente 3, 3' sind in einer konischen Bohrung 8 in einem Federteller 4 gegen die Ventilfederkraft einer Ventilfeder 5 gegeneinander verkeilt. Am Ende des Ventilschaftes 2 liegt eine Druckplatte 6 auf. Sie ist in einer, zur konischen Bohrung 8 koaxial angeordneten zylindrischen Bohrung 9, deren Innendurchmesser größer als der größte Innendurchmesser der konischen Bohrung 8 ist, radial gehalten. Am Außenumfang des Ventilschaftes 2 sind drei Ringnuten 10, 10' radial zu einer Hubventilachse 11 eingearbeitet. In diese greifen die zwei Ventilkegelelemente 3, 3' mit drei, an deren Innenumfang angeformten Federn ein. Durch diesen Eingriff ist ein Formschluß zwischen dem Ventilschaft 2 und den Ventilkegelelementen 3, 3' gewährleistet. Die Ventilkegelelemente 3, 3' haben eine konische Außenform. Der große Außendurchmesser befindet sich auf der Seite des Ventilschaftendes. Die Ventilkegelelemente 3, 3' ragen fast bis auf die Höhe des Ventilschaftendes, berühren jedoch die Druckplatte 6 nicht. Somit ist in der zusammengebauten Ventilhalterung 1 immer ein Ringspalt 7 zwischen der Druckplatte 6 und den Ventilkegelelementen 3, 3' vorhanden.Figure 1 shows a sectional view of a valve holder 1. On a valve stem 2, two valve cone elements 3, 3 'are arranged on the outer circumference of the valve stem 2. The valve stem 2 and the valve cone elements 3, 3 'are conical Bore 8 in a spring plate 4 against the valve spring force of a valve spring 5 against each other wedged. At the end of the valve stem 2 there is a pressure plate 6. she is in a cylindrical bore 9 arranged coaxially with the conical bore 8, whose inner diameter is larger than the largest inner diameter of the conical Bore 8 is held radially. There are three on the outer circumference of the valve stem 2 Annular grooves 10, 10 'incorporated radially to a lift valve axis 11. Reach into them the two valve cone elements 3, 3 'with three, integrally formed on the inner circumference Feathers. This engagement results in a positive connection between the valve stem 2 and the valve cone elements 3, 3 'guaranteed. The valve cone elements 3, 3 ' have a conical outer shape. The large outside diameter is on the side of the valve stem end. The valve cone elements 3, 3 'protrude almost up to the height of the valve stem end, but do not touch the pressure plate 6. So is in the assembled valve holder 1 always an annular gap 7 between the Pressure plate 6 and the valve cone elements 3, 3 'available.

Um lokale Temperaturerhöhungen in der Druckplatte 6 durch den Anpreßdruck eines nicht dargestellten Nockens oder Kipphebels während des Betriebs der Brennkraftmaschine zu vermeiden, muß diese mit einem radialen Spiel in dem Ventilteller 4 auf dem Ventilschaft 2 aufliegen. Das radiale Spiel ermöglicht ihr eine Drehung um die Hubventilachse 11. Somit wird eine gleichmäßigere Temperaturverteilung im Betrieb sichergestellt.To local temperature increases in the pressure plate 6 by the contact pressure Not shown cam or rocker arm during operation of the internal combustion engine to avoid this with a radial clearance in the valve plate 4 rest on the valve stem 2. The radial play enables her to turn around the lift valve axis 11. Thus, a more uniform temperature distribution in the Operation ensured.

Bei der Montage der Anordnung wird der Ventilschaft 2 in die konische Bohrung 8 von der, von der Druckplatte 6 abgewandten Seite eingeführt. Anschließend wird der Ventilteller 4 mit einem Spezialwerkzeug gegen die Federkraft der Ventilfeder 5 gedrückt, so dass der Ventilschaft 2 mindestens um seine Führungslänge im Federteller 4 über den Rand der Bohrung 9 hinausragt. Im nächsten Schritt werden die zwei Ventilkegelelemente 3, 3' in die Ringnuten 10, 10' am Ventilschaft 2 eingesetzt. Dann wird die Anpreßkraft des Spezialwerkzeuges gegen die Federkraft verringert, so dass der Ventilschaft 2 mit den zwei Ventilkegelelementen 3, 3' mit deren konischen Außenumfang in die konische Bohrung 8 hineingleiten. Aufgrund der Federkraft der Ventilfeder 5 verkeilen sich nun die Ventilkegelelemente 3, 3' in der konischen Bohrung 8. Im letzten Arbeitsschritt wird noch die Druckplatte 6, ein Ventilspielausgleichselement, in die zylindrische Bohrung 9 eingesetzt.When assembling the arrangement, valve stem 2 is inserted into conical bore 8 introduced from the side facing away from the pressure plate 6. Then will the valve disk 4 with a special tool against the spring force of the valve spring 5 pressed so that the valve stem 2 at least by its guide length in the spring plate 4 extends beyond the edge of the bore 9. In the next step, the two valve cone elements 3, 3 'inserted into the ring grooves 10, 10' on the valve stem 2. Then the contact pressure of the special tool against the spring force is reduced, so that the valve stem 2 with the two valve cone elements 3, 3 'with their slide the conical outer circumference into the conical bore 8. Due to the The spring force of the valve spring 5 now wedges the valve cone elements 3, 3 'in the conical bore 8. In the last step, the pressure plate 6, a valve lash adjuster, inserted into the cylindrical bore 9.

Der geringe Abstand zwischen den Ventilkegelelementen 3, 3' und der Druckplatte 6 verhindert zuverlässig ein Kippen dieser.The small distance between the valve cone elements 3, 3 'and the pressure plate 6 reliably prevents this from tipping.

In weiteren Ausgestaltungsvarianten kann die Anzahl der Ringnuten 10 am Ventilschaft 2, in die die Ventilkegelelemente 3, 3' eingreifen, variieren. Ebenso können mehr als zwei Ventilkegelelemente 3, 3' verbaut sein. Zur einfacheren und besseren Montage der Druckplatte 6 kann eine Schlupffase an der zylindrischen Bohrung 9 angebracht werden. In further design variants, the number of annular grooves 10 on the valve stem 2, in which the valve cone elements 3, 3 'engage, vary. You can also more than two valve cone elements 3, 3 'can be installed. For simpler and better Assembly of the pressure plate 6 can be a slip chamfer on the cylindrical bore 9 are attached.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Ventilhalterungvalve holder
22
Ventilschaftvalve stem
3, 3'3, 3 '
VentilkegelelementPoppet element
44
Federtellerspring plate
55
Ventilfedervalve spring
66
Druckplatteprinting plate
77
Ringspaltannular gap
88th
Konische BohrungTapered bore
99
Zylindrische BohrungCylindrical bore
10, 10'10, 10 '
Ringnutring groove
1111
HubventilachseHubventilachse

Claims (4)

Ventilhalterung für einen Ventilschaft eines Hubventils einer Brennkraftmaschine, der von zumindest zwei Ventilkegelelementen, die koaxial zwischen dem Ventilschaft und einem Federteller angeordnet sind, diesen in axialer Richtung gegen die Federkraft von zumindest einer Ventilfeder, deren Federkraft axial auf den Federteller wirkt und koaxial um das Hubventil angeordnet ist, in dem Federteller gehaltert ist und einer Druckplatte die auf dem Ventilschaft in axialer Richtung aufliegt und radial von dem Federteller umschlossen ist,
dadurch gekennzeichnet, dass das Ventilkegelelement (3) bis auf die Höhe des Ventilschaftendes verlängert ist.Valve holder for a valve stem of a lift valve of an internal combustion engine, which of at least two valve cone elements, which are arranged coaxially between the valve stem and a spring plate, these in the axial direction against the spring force of at least one valve spring, the spring force of which acts axially on the spring plate and coaxially around the lift valve is arranged, is held in the spring plate and a pressure plate which rests on the valve stem in the axial direction and is radially enclosed by the spring plate,
characterized in that the valve cone element (3) is extended to the height of the valve stem end. Ventilhalterung nach Anspruch 1,
dadurch gekennzeichnet, dass der maximale Abstand der Druckplatte (6) vom oberen Ende des Ventilkegelelements (3) 0,5 mm ist. Valve holder according to claim 1,
characterized in that the maximum distance of the pressure plate (6) from the upper end of the valve cone element (3) is 0.5 mm. Ventilhalterung nach Anspruch 1,
dadurch gekennzeichnet, dass die Druckplatte (6) ein Ventilspielausgleichselement ist.Valve holder according to claim 1,
characterized in that the pressure plate (6) is a valve clearance compensation element. Ventilhalterung nach zumindest einem der zuvor genannten Ansprüche,
dadurch gekennzeichnet, dass die Druckplatte (6) in axialer Richtung über den Federteller (4) ragt.Valve holder according to at least one of the preceding claims,
characterized in that the pressure plate (6) projects axially over the spring plate (4).
EP01111610A 2000-06-30 2001-05-12 Internal combustion engine valve lock assembly Expired - Lifetime EP1167701B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10031973A DE10031973C2 (en) 2000-06-30 2000-06-30 Valve holder for a lift valve of an internal combustion engine
DE10031973 2000-06-30

Publications (2)

Publication Number Publication Date
EP1167701A1 true EP1167701A1 (en) 2002-01-02
EP1167701B1 EP1167701B1 (en) 2005-03-16

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ID=7647399

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01111610A Expired - Lifetime EP1167701B1 (en) 2000-06-30 2001-05-12 Internal combustion engine valve lock assembly

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EP (1) EP1167701B1 (en)
DE (2) DE10031973C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010002996A1 (en) * 2008-07-02 2010-01-07 Charter Manufacturing Co., Inc. Valve spring retainer

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR931101A (en) * 1945-07-23 1948-02-13 Eaton Mfg Co Improvements to a valve for an internal combustion engine
US2827891A (en) * 1954-12-16 1958-03-25 Herbert H Engemann Valve tip construction
US2851022A (en) * 1954-11-09 1958-09-09 Gen Motors Corp Poppet valve operating mechanism
DE2014575A1 (en) 1970-03-26 1971-10-14 Daimler Benz AG, 7000 Stuttgart Unterturkheim Valve control arrangement
GB2186057A (en) * 1986-01-31 1987-08-05 Robert Anthony Furnivall Internal combustion engine valve assemblies
DE19548290A1 (en) * 1995-12-22 1997-07-03 Audi Ag Device for turning valve of internal combustion engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3614258A1 (en) * 1986-04-26 1987-10-29 Motomak HYDRAULIC VALVE COMPENSATION COMPENSATION DEVICE FOR COMBUSTION ENGINES

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR931101A (en) * 1945-07-23 1948-02-13 Eaton Mfg Co Improvements to a valve for an internal combustion engine
US2851022A (en) * 1954-11-09 1958-09-09 Gen Motors Corp Poppet valve operating mechanism
US2827891A (en) * 1954-12-16 1958-03-25 Herbert H Engemann Valve tip construction
DE2014575A1 (en) 1970-03-26 1971-10-14 Daimler Benz AG, 7000 Stuttgart Unterturkheim Valve control arrangement
GB2186057A (en) * 1986-01-31 1987-08-05 Robert Anthony Furnivall Internal combustion engine valve assemblies
DE19548290A1 (en) * 1995-12-22 1997-07-03 Audi Ag Device for turning valve of internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010002996A1 (en) * 2008-07-02 2010-01-07 Charter Manufacturing Co., Inc. Valve spring retainer

Also Published As

Publication number Publication date
EP1167701B1 (en) 2005-03-16
DE50105590D1 (en) 2005-04-21
DE10031973A1 (en) 2002-02-28
DE10031973C2 (en) 2002-11-21

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