EP0197247A2 - Dispositif de compensation du jeu dans la commande de soupapes - Google Patents

Dispositif de compensation du jeu dans la commande de soupapes Download PDF

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Publication number
EP0197247A2
EP0197247A2 EP86100894A EP86100894A EP0197247A2 EP 0197247 A2 EP0197247 A2 EP 0197247A2 EP 86100894 A EP86100894 A EP 86100894A EP 86100894 A EP86100894 A EP 86100894A EP 0197247 A2 EP0197247 A2 EP 0197247A2
Authority
EP
European Patent Office
Prior art keywords
valve
clearance compensation
compensation device
valve clearance
membrane
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.)
Withdrawn
Application number
EP86100894A
Other languages
German (de)
English (en)
Other versions
EP0197247A3 (fr
Inventor
Hans Deuring
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.)
Goetze GmbH
Original Assignee
Goetze GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Goetze GmbH filed Critical Goetze GmbH
Publication of EP0197247A2 publication Critical patent/EP0197247A2/fr
Publication of EP0197247A3 publication Critical patent/EP0197247A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • F01L1/245—Hydraulic tappets
    • F01L1/25—Hydraulic tappets between cam and valve stem
    • 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
    • F01L2309/00—Self-contained lash adjusters

Definitions

  • the invention relates to a valve lash adjuster, in particular for valves of internal combustion engines, with a valve lug preferably arranged on the side of the camshaft, a valve lash compensation element provided inside the valve liner and interacting with the valve tappet, and an elastic membrane sealing the area filled with an incompressible medium within the valve cup.
  • DE-OS 25 17 370 discloses a hydraulic lash adjuster, in particular for controlling the engine valves of internal combustion engines.
  • the camshaft interacts with a valve cup which is approximately U-shaped in cross section and which cooperates radially on the inside with an axially displaceable piston which delimits a pressure chamber enclosed within the valve cup.
  • Several individual components forming the valve clearance compensation element are provided within the pressure chamber.
  • the pressure chamber completely filled with a hydraulic working fluid is sealed by means of an essentially tubular elastic membrane.
  • valve lash adjustment element consists of several individual parts, which must also be installed individually when the valve lash adjustment device is installed.
  • Such systems are for cup tappets (closed Systems) cannot be used. Since there are different design approaches for the systems to be developed, membranes cannot be used as sealing elements in the spooled form.
  • the object on which the invention is based is to find a way of sealing cup tappets of this type with closed systems, which makes it possible to compensate for temperature increases and changes in volume of the medium and / or wear. At the same time, it is required that the seal can transmit the torque exerted by the valve cup to the valve.
  • the membrane extends substantially radially between the inner circumferential surface of the valve cup and the outer timnfangs simulation the valve clearance compensation element and is fixed in the radial end regions by clamping by means of additional stiffening elements.
  • elastomer membranes are used to solve the problem, which must be flexible, therefore thin-walled.
  • the radial end regions of the membrane can be made thickened in a bead shape.
  • the two bead-shaped end regions are joined together by a membrane which is thinner in cross-section and is preferably approximately V-shaped connected, wherein the tip of the membrane is directed axially towards the bottom of the valve cup.
  • the stiffening element which clamps the outer circumferential region of the valve clearance compensation element is formed by an approximately tubular metal part.
  • the tube In order not only to clamp the valve lash adjuster designed as a one-piece body radially, but also to secure it for transport and assembly of the complete valve lash adjuster against axial slipping out, it is further proposed to provide the tube with a bottom, which is preferably axially set back in the direction of the valve lash adjuster.
  • the entire area between the valve and the camshaft is thus sealed, with simultaneous good axial guidance of both the valve clearance compensation element and the valve tappet set off in this area.
  • the transition of the tubular area into the ground is approximately semicircular in cross section.
  • the entire body can be produced in a simple manner as a deep-drawn part, the open area of the U-shaped metal part being axially inward in the installed state Direction of the valve clearance compensation element points.
  • the metal part may be expedient to connect the metal part to the membrane, that is to say the radially inner bead, at least in its tubular region by vulcanization.
  • the seal between the valve clearance compensation element and the bead-shaped area of the membrane is still made by clamping and not by the quality of the adhesion of the elastomer material to the vulcanized metal part.
  • the radially inside clamping metal part is profiled.
  • This positioning in the vulcanizing mold also leads to a positioning of the two stiffening elements in the hydraulic bucket tappet.
  • valve cup men acting bead radially clamping stiffening element is also tubular. Since there is no vulcanization between the radially outer bead and the stiffening element, but a pure clamp connection is present, the stiffening element can be formed both from metal and from a suitable plastic.
  • the stiffening element is designed to be stepped in the region of its radially outer axial extent.
  • the end region of the stiffening element which runs out in the region of the V-profile of the membrane is preferably provided with a plurality of essentially radially extending, resilient tongues which cooperate with the membrane, the tongues preferably not running parallel to the region of the membrane which extends radially from the outside inwards .
  • the tongues also serve, as already mentioned, for torque transmission.
  • the tongues in the area of their free ends are bent approximately axially in the direction of the valve tappet, the bends running essentially parallel to the tubular area of the radially inner metal part.
  • the tongues or their bends engage in corresponding recesses in the region of the radially inner bead of the membrane and thus form an anti-rotation device at the same time.
  • the structural design of the radially outer stiffening element also offers the possibility of bending the radially resilient tongues in such a way that they engage radially under the tubular region of the radially inner metal part.
  • this solution allows the inner metal part to be held down, which holds it on the head of the valve lash compensation element until after the cup tappet has been installed in the cylinder head, the valve head itself presses this cap in a form-fitting manner.
  • the arrangement described has the advantage that the holding-down device and the membrane form a component which is easy to handle for the final assembly and prevents the compensation element from having to be held over the membrane which is too flexible in this case. This also ensures that the unit is secured in transit.
  • the axial leg of the radially outer stiffening element cooperating with the valve cup is bent at an angle in the direction of the valve cup and engages in a corresponding groove in the inner circumferential area of the membrane during assembly.
  • the element used for torque transmission can be designed so that it replaces the vulcanized metal ring for the seat in the cup.
  • the part for torque transmission in a groove on The outer diameter of the membrane is tied in and thus forms the support ring for the clamping connection to the valve cup.
  • Figures 1 and 2 each show a valve lash adjuster, the basic structure of which is approximately identical. Differences are only due to the design of the sealing area.
  • the valve lash adjuster consists of a valve cup 1 which is approximately U-shaped in cross section, the base 2 of which preferably interacts with a camshaft (not shown).
  • a valve cup 1 which is approximately U-shaped in cross section, the base 2 of which preferably interacts with a camshaft (not shown).
  • a one-piece valve lash compensation element 3 Arranged radially inside the valve cup 1 is a one-piece valve lash compensation element 3, not shown in its individual parts, which on the one hand interacts with the inner end face 4 of the base 2 and on the other hand with the valve tappet 5.
  • the valve clearance compensation element 3 is guided within the valve cup 1 by means of a circumferential radial shoulder 7 provided with axial bores 6.
  • An elastic membrane is used to seal the pressure chamber 8 filled with an incompressible medium bran 9 is provided, which extends substantially radially between the inner circumferential surface 10 of the valve cup 1 and the outer circumferential surface 11 of the valve clearance compensation element 3, forming an approximately V-shaped cross section.
  • the membrane 9 In its radial end regions 12, 13, the membrane 9 has a thickened, bead-like configuration and is fixed in a position-oriented manner by radial clamping by means of additional stiffening elements 14, 15, 15 '.
  • the tip 16 of the membrane 9 faces the bottom 2 of the valve cup 1.
  • the membrane 9 itself consists of a fluorosilicone rubber.
  • the stiffening element 14, which clamps the radially inner bead 13, consists of a deep-drawn metal part with a tubular outer area 17.
  • the metal part 14 is provided with an axially recessed base 18 for axially supporting the valve clearance compensation element 3.
  • the tubular region 17 of the metal part 14 is preferably connected to the bead 13 by vulcanization.
  • the stiffening element 15, 15 ' which fixes the bead 12 radially with respect to the valve cup 1 is likewise tubular in this case.
  • the stiffening element 15 according to FIG. 1 consists of metal and the stiffening element 15 'according to FIG. 2 consists of plastic.
  • Both stiffening elements 15, 15 ' are graduated in the region of their radially outer axial extension 19, the end regions 20 of the stiffening elements 15, 15' located on the diaphragm ending in essentially radially extending resilient tongues 21.
  • the free end regions 22 of the tongues 21 are bent radially and reach under the tubular region 17 of the inner stiffening element, serving as a transport lock mentes 14, wherein they engage in corresponding recesses 23 of the bead 13 for torque transmission.
  • Figure 2 shows that the resilient tongues 21 are bent approximately axially in their free end regions 24, run approximately parallel to the tubular region 17 of the inner stiffening element 14 and are tied into corresponding recesses 25 of the bead 13 for the purpose of torque transmission.
  • FIG. 2 also reveals that the axial leg 26 cooperating with the inner circumferential surface 10 of the valve cup 1 is bent approximately radially and snaps into a circumferential annular groove 27 of valve cup 1 during assembly in the manner of a snap connection.
  • FIG. 3 and 4 show the membrane 9 as a single part.
  • the radially inner stiffening element 14 is vulcanized into the bead 13, while the radially outer stiffening element 15 is designed as a pure clamping part and on the one hand clamps the radially outer bead 12 and on the other hand for torque transmission with resilient tongues 21 or bends 24 formed thereon in corresponding recesses 25 in the bead 13 engages.
  • FIG. 4 shows the snap connection already mentioned in FIG. 2 between the radially bent axial leg 26 of the stiffening element 15 ′ and the annular groove 27 made in the inner peripheral surface of the valve cup 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP86100894A 1985-04-12 1986-01-23 Dispositif de compensation du jeu dans la commande de soupapes Withdrawn EP0197247A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853513161 DE3513161A1 (de) 1985-04-12 1985-04-12 Ventilspielausgleichseinrichtung
DE3513161 1985-04-12

Publications (2)

Publication Number Publication Date
EP0197247A2 true EP0197247A2 (fr) 1986-10-15
EP0197247A3 EP0197247A3 (fr) 1987-04-22

Family

ID=6267849

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86100894A Withdrawn EP0197247A3 (fr) 1985-04-12 1986-01-23 Dispositif de compensation du jeu dans la commande de soupapes

Country Status (5)

Country Link
US (1) US4656978A (fr)
EP (1) EP0197247A3 (fr)
JP (1) JPS61237809A (fr)
DE (1) DE3513161A1 (fr)
ES (1) ES296686Y (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0232482A1 (fr) * 1986-02-13 1987-08-19 Goetze Ag Dispositif de rattrapage de jeu
EP0287754A3 (fr) * 1987-04-24 1989-04-19 Goetze Ag Poussoir hydraulique fermé
EP0400601A1 (fr) * 1989-06-02 1990-12-05 Nittan Valve Co., Ltd. Compensateur hydraulique de jeu du type à action directe
EP0400602A1 (fr) * 1989-06-02 1990-12-05 Nittan Valve Co., Ltd. Compensateur hydraulique de jeu du type à action directe

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3617858A1 (de) * 1986-05-27 1987-12-03 Freudenberg Carl Fa Tassenstoessel
JPS62294708A (ja) * 1986-06-14 1987-12-22 Honda Motor Co Ltd 密封型ラツシユアジヤスタ
DE3722844A1 (de) * 1987-07-10 1989-01-19 Goetze Ag Tassenstoessel fuer die hydraulische ventilsteuerung einer brennkraftmaschine
DE3812333A1 (de) * 1988-04-14 1989-10-26 Schaeffler Waelzlager Kg Sich selbsttaetig hydraulisch einstellender ventilstoessel
DE4130529A1 (de) * 1991-09-13 1993-03-18 Schaeffler Waelzlager Kg Hydraulischer tassenstoessel mit integriertem vorratsraum
DE4131696A1 (de) * 1991-09-24 1993-03-25 Schaeffler Waelzlager Kg Hydraulischer tassenstoessel
DE4136746A1 (de) * 1991-11-08 1993-05-13 Schaeffler Waelzlager Kg Sich selbsttaetig hydraulisch einstellendes spielausgleichselement
JP3268463B2 (ja) * 1992-03-03 2002-03-25 フジオーゼックス株式会社 内燃機関用油圧式タペット
US7798199B2 (en) * 2007-12-04 2010-09-21 Ati Properties, Inc. Casting apparatus and method
US9597759B2 (en) * 2014-03-28 2017-03-21 Pratt & Whitney Canada Corp. Positioning assembly and method
CN111720185B (zh) * 2020-05-29 2021-09-17 东风汽车集团有限公司 一种气门间隙自动调节的挺柱、配气机构及发动机

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2526593A (en) * 1948-04-15 1950-10-17 Eaton Mfg Co Hydraulic compensating mechanism
US2654356A (en) * 1949-07-23 1953-10-06 Eaton Mfg Co Hydraulic tappet
US2833257A (en) * 1955-07-05 1958-05-06 Daimler Benz Ag Valve control mechanism for internal combustion engines
US2971502A (en) * 1959-08-12 1961-02-14 Wride Donald Charles Silent cam follower
US3521608A (en) * 1968-10-16 1970-07-28 Gen Motors Corp Self-contained hydraulic valve lifter
DE2517370A1 (de) * 1975-04-19 1976-10-28 Volkswagenwerk Ag Hydraulische spielausgleichsvorrichtung
JPS53107517A (en) * 1977-03-02 1978-09-19 Aisin Seiki Co Ltd Enclosed rush adjuster
US4392462A (en) * 1980-12-22 1983-07-12 Stanadyne, Inc. Inverted bucket tappet with seal
US4397271A (en) * 1981-03-02 1983-08-09 Stanadyne, Inc. Semi-self-contained hydraulic lash adjuster
DE3421420A1 (de) * 1983-08-16 1985-03-07 IRM-Antriebstechnik GmbH, 7057 Winnenden Oel-zulauf mit ruecklaufsperre fuer tassenstoessel mit hydraulischem ventilspielausgleich
DE3484823D1 (de) * 1983-12-07 1991-08-22 Eaton Corp Hydraulischer ventilstoessel.
IT8467294A0 (it) * 1984-03-27 1984-03-27 Riv Officine Di Villar Perosa Punteria idraulica per il comando del moto di una valvola di un motore endotermico
US4590899A (en) * 1985-05-17 1986-05-27 Stanadyne, Inc. Self-contained lash adjuster with shell mounted cartridge assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0232482A1 (fr) * 1986-02-13 1987-08-19 Goetze Ag Dispositif de rattrapage de jeu
EP0287754A3 (fr) * 1987-04-24 1989-04-19 Goetze Ag Poussoir hydraulique fermé
EP0400601A1 (fr) * 1989-06-02 1990-12-05 Nittan Valve Co., Ltd. Compensateur hydraulique de jeu du type à action directe
EP0400602A1 (fr) * 1989-06-02 1990-12-05 Nittan Valve Co., Ltd. Compensateur hydraulique de jeu du type à action directe

Also Published As

Publication number Publication date
ES296686U (es) 1987-12-01
US4656978A (en) 1987-04-14
ES296686Y (es) 1988-05-16
EP0197247A3 (fr) 1987-04-22
DE3513161C2 (fr) 1987-12-10
DE3513161A1 (de) 1986-10-16
JPS61237809A (ja) 1986-10-23

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Inventor name: DEURING, HANS