EP0197246B1 - Ventilspielausgleichseinrichtung - Google Patents

Ventilspielausgleichseinrichtung Download PDF

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Publication number
EP0197246B1
EP0197246B1 EP86100893A EP86100893A EP0197246B1 EP 0197246 B1 EP0197246 B1 EP 0197246B1 EP 86100893 A EP86100893 A EP 86100893A EP 86100893 A EP86100893 A EP 86100893A EP 0197246 B1 EP0197246 B1 EP 0197246B1
Authority
EP
European Patent Office
Prior art keywords
membrane
valve
play compensating
component
valve play
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
EP86100893A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0197246A3 (en
EP0197246A2 (de
Inventor
Hartmut Dr. Treiber
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
Priority to AT86100893T priority Critical patent/ATE51934T1/de
Publication of EP0197246A2 publication Critical patent/EP0197246A2/de
Publication of EP0197246A3 publication Critical patent/EP0197246A3/de
Application granted granted Critical
Publication of EP0197246B1 publication Critical patent/EP0197246B1/de
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
    • 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 with closed oil filling, for valves of internal combustion engines, with a valve cup arranged on the side of the camshaft, a valve lash compensation element provided within the valve cup and interacting with the valve tappet, and an elastic membrane sealing the area filled with an incompressible medium within the valve cup which extends as a sealing body essentially radially between the inner circumference of a valve cup formed from a cylindrical and a circular component, both of which are positively connected to one another, and the outer circumference of the valve lash compensation element, the membrane being connected to the cylindrical component.
  • DE-OS 25 17 370 discloses a hydraulic lash adjuster, in particular for controlling the engine valves of internal combustion engines.
  • An approximately U-shaped valve cup made of cast material interacts with the camshaft and cooperates radially on the inside with an axially displaceable piston which delimits a pressure chamber enclosed within the valve cup.
  • a number of individual components forming the actual valve lash compensation element are arranged within the pressure chamber.
  • the pressure chamber which is completely filled with a hydraulic medium, is sealed by means of an essentially tubular membrane which extends axially between the valve cup and the piston.
  • valve clearance compensation element consists of several components, which must also be assembled individually. Systems of this type are too expensive for cup tappets under development (closed systems) or cannot be used at all. Since various design approaches are specified for the new systems, the membranes mentioned in the prior art cannot be used as sealing elements. In addition, cast components are relatively heavy and do not necessarily increase the overall weight of the unit, which not least has a negative impact on pricing.
  • US Pat. No. 3,521,608 discloses a valve cup which is formed from a cylindrical and circular-shaped component, both of which are positively connected to one another, the membrane extending essentially radially between the cylindrical component of the valve cup and the valve clearance compensation element.
  • the relatively thin diaphragm cannot conduct the torques occurring in the valve cup to the valve without the diaphragm being destroyed.
  • the fastening of the sealing bead of the membrane to the inner circumference of the cup by means of a clamping ring creates the risk of a membrane tearing.
  • the device consists of a large number of parts that must be assembled individually.
  • 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.
  • the seal can transmit the torque exerted by the valve cup to the valve.
  • a weight-optimized valve lash adjuster is to be created for reasons of competition.
  • the cylindrical component is provided in the receiving region on the camshaft side with a circumferential, radially inwardly facing collar, while the circular component is provided in the region of its outer peripheral surface with a circumferential bead which extends in the direction of the membrane. which engages behind the collar of the cylindrical component in such a way that the membrane comes into contact with a sealing bead in the area of the bead of the circular component, and that the membrane is provided as a hub-like guide body between the inner circumference of the cylindrical component and the outer circumference of the valve clearance compensation element.
  • the membrane not only performs sealing tasks, but also serves as a guide body for the valve clearance compensation element.
  • the valve lash adjuster is easy to assemble, since an absolutely tight connection is produced by simple snap-in, which moreover does not require additional sealing bodies and is not subject to wear due to its construction.
  • the membrane can be connected to the cylindrical component either by vulcanization or by clamping.
  • the version to be selected should be made dependent on the application.
  • the peripheral region of the membrane receiving the valve clearance compensation element is reinforced by a metal part.
  • the metal part can be essentially cylindrical here and connected to the membrane by vulcanization.
  • the vulcanized metal part preferably has, at the axial end facing the oil chamber, a radially inwardly facing shoulder which, in the installed state, serves as an axial stop for the valve clearance compensation element.
  • the inner peripheral surface of the membrane facing the valve clearance compensation element is provided with a corrugated profile running in the axial direction. The valve lash adjuster can thus be pressed axially into the membrane up to the attachment of the metal part, further radial approaches for lateral guidance of the valve lash adjuster being omitted.
  • the sealing takes place via the rubber deformation between the valve clearance compensation element and the membrane area surrounding it.
  • the same type of sealing is selected in the form-fitting connection area between the cylindrical and the circular-shaped component of the valve cup, i.e. the forces to the guide shirt (cylinder) also acting eccentrically on the base (circular blank) are absorbed essentially by the metallic snap connection.
  • the hydraulic fluid is sealed by deforming the preferably vulcanized circumferential rubber bead through the circumferential bead of the round blank.
  • the proposed solution enables the system to be filled with hydraulic oil under oil without air bubbles, without using a vacuum.
  • valve clearance compensation device 4 arranged in the area of the cylinder head 1 between the camshaft 2 and the valve tappet 3 of a valve of an internal combustion engine (not shown).
  • the valve clearance compensation device 4 consists of a valve cup 5, which is composed of a cylindrical 6 and a circular member 7.
  • a membrane 8 made of elastomeric material and connected to the cylindrical component 6 by vulcanization is arranged, which extends essentially radially inwards and cooperates in the area of its inner peripheral surface 9 with a valve clearance compensation element 10 designed as an installation unit for installation reasons.
  • the free end 11 of the cylindrical component 6 has a radially inwardly extending collar 12.
  • the round-shaped construction member 7 is provided in the region of its outer peripheral surface with a bead 13 which extends axially in the direction of the membrane 8.
  • the radially outer axial shoulder 14 of the circular blank 7 and the collar 12 overlap one another in such a way that the circular blank 7 can be pressed into the cylinder 6 in the manner of a snap connection.
  • the membrane 8 is provided with a circumferential sealing bead 15. After the round 7 has been pressed into the cylinder 6, the former bears sealingly against the sealing bead 15 with axial pretension.
  • the inner circumferential region 9 of the membrane 8 receiving the valve clearance compensation element 10 is stiffened by an adhesive part 16, the inner circumferential surface of the membrane 8 being provided with a corrugated profile 17 running in the axial direction.
  • the adhesive part 16 is provided in the region of the pressure chamber 18 receiving the incompressible medium with a radially inwardly facing extension 19, which serves as an axial stop when the valve clearance compensation element 10 is pressed axially into the membrane 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Hydraulic Control Valves For Brake Systems (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Magnetically Actuated Valves (AREA)
EP86100893A 1985-04-12 1986-01-23 Ventilspielausgleichseinrichtung Expired - Lifetime EP0197246B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86100893T ATE51934T1 (de) 1985-04-12 1986-01-23 Ventilspielausgleichseinrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3513162 1985-04-12
DE19853513162 DE3513162A1 (de) 1985-04-12 1985-04-12 Ventilspielausgleichseinrichtung

Publications (3)

Publication Number Publication Date
EP0197246A2 EP0197246A2 (de) 1986-10-15
EP0197246A3 EP0197246A3 (en) 1987-05-06
EP0197246B1 true EP0197246B1 (de) 1990-04-11

Family

ID=6267850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86100893A Expired - Lifetime EP0197246B1 (de) 1985-04-12 1986-01-23 Ventilspielausgleichseinrichtung

Country Status (5)

Country Link
EP (1) EP0197246B1 (enrdf_load_stackoverflow)
JP (1) JPS61237808A (enrdf_load_stackoverflow)
AT (1) ATE51934T1 (enrdf_load_stackoverflow)
DE (1) DE3513162A1 (enrdf_load_stackoverflow)
ES (1) ES296687Y (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3606824A1 (de) * 1986-02-13 1987-08-20 Goetze Ag Ventilspielausgleichseinrichtung
DE3639911A1 (de) * 1986-11-22 1988-06-01 Schaeffler Waelzlager Kg Sich selbsttaetig hydraulisch einstellender ventilstoessel
DE4026793A1 (de) * 1990-08-24 1992-03-05 Freudenberg Carl Fa Hydraulisches ventilspielausgleichselement fuer brennkraftmaschinen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495577A (en) * 1968-02-07 1970-02-17 Clifford H Collins Self-contained hydraulic tappet
US3521608A (en) * 1968-10-16 1970-07-28 Gen Motors Corp Self-contained hydraulic valve lifter
GB2093940A (en) * 1981-03-02 1982-09-08 Stanadyne Inc Hydraulic lash adjuster

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB562101A (en) * 1942-12-14 1944-06-19 Arthur Burton Buckley Improvements in or relating to adjustable distance-pieces, tappets, valve-lifters and like adjustable devices
DE1914693B2 (de) * 1969-03-22 1978-02-16 Motomak Motorenbau Maschinen- U. Werkzeugfabrik, Konstruktionen Gmbh, 8070 Ingolstadt Ventilstoessel fuer brennkraftmaschinen mit obenliegender nockenwelle
DE3421420A1 (de) * 1983-08-16 1985-03-07 IRM-Antriebstechnik GmbH, 7057 Winnenden Oel-zulauf mit ruecklaufsperre fuer tassenstoessel mit hydraulischem ventilspielausgleich
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495577A (en) * 1968-02-07 1970-02-17 Clifford H Collins Self-contained hydraulic tappet
US3521608A (en) * 1968-10-16 1970-07-28 Gen Motors Corp Self-contained hydraulic valve lifter
GB2093940A (en) * 1981-03-02 1982-09-08 Stanadyne Inc Hydraulic lash adjuster

Also Published As

Publication number Publication date
DE3513162A1 (de) 1986-10-16
JPS61237808A (ja) 1986-10-23
EP0197246A3 (en) 1987-05-06
DE3513162C2 (enrdf_load_stackoverflow) 1989-05-11
ES296687Y (es) 1988-05-16
ATE51934T1 (de) 1990-04-15
EP0197246A2 (de) 1986-10-15
ES296687U (es) 1987-12-01

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