EP0257354B1 - Sich selbsttätig hydraulisch einstellender Ventilstössel - Google Patents

Sich selbsttätig hydraulisch einstellender Ventilstössel Download PDF

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Publication number
EP0257354B1
EP0257354B1 EP87111152A EP87111152A EP0257354B1 EP 0257354 B1 EP0257354 B1 EP 0257354B1 EP 87111152 A EP87111152 A EP 87111152A EP 87111152 A EP87111152 A EP 87111152A EP 0257354 B1 EP0257354 B1 EP 0257354B1
Authority
EP
European Patent Office
Prior art keywords
housing
valve tappet
inner part
guide sleeve
tappet according
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
EP87111152A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0257354A1 (de
Inventor
Dieter Goppelt
Dieter Schmidt
Steffen Hertrich
Jürgen Dipl.-Ing. Rabe
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.)
INA Waelzlager Schaeffler OHG
Original Assignee
INA Waelzlager Schaeffler OHG
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 INA Waelzlager Schaeffler OHG filed Critical INA Waelzlager Schaeffler OHG
Publication of EP0257354A1 publication Critical patent/EP0257354A1/de
Application granted granted Critical
Publication of EP0257354B1 publication Critical patent/EP0257354B1/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

Definitions

  • the invention relates to an automatically hydraulically adjusting valve tappet, which is arranged in a guide bore of a cylinder head of an internal combustion engine and against whose one end face a control cam runs, and which, on the other hand, rests with a second end face against the end of a valve stem, the valve tappet being made from a cup Housing consists, which comprises a hollow cylindrical wall, which is closed at one end by a bottom, against which the control cam runs from the outside, and in which an inner part made of polymeric material is accommodated, which forms a guide sleeve concentric with the hollow cylindrical wall , in which the actual play compensation element is guided in a longitudinally displaceable manner and rests with its end against the end of the valve stem.
  • the hollow cylindrical wall of the housing is made in one piece with the inner part made of polymeric material and molded onto an edge area of the metallic base, the polymeric material being provided with through-openings in this edge area in order to achieve good fastening must penetrate.
  • the guide sleeve of the inner part has an oil reservoir starting from its inner surface, while its outside is open to the valve stem.
  • this valve tappet has a lower wear resistance than a valve tappet, the wall of which is a steel part, when the outer lateral surface of its wall made of polymeric material slides in the guide bore of the metallic cylinder head.
  • JP-A 5 965 508 shows a valve tappet, the oil guidance of which is determined by concentrically nested cylindrical rings, so that there are annular passage cross sections for the oil on the entire circumference within the valve tappet.
  • both the housing and the parts connected to it to delimit an outer oil reservoir and form the guide sleeve, and possibly additional parts to achieve a certain oil flow, are made of metal and can be made by suitable measures, e.g. by welding. Because of the variety. the individual parts and the connection points, these valve tappets are very complex to manufacture and there is often a risk of leaks or even breaks at the connection points (EP-A 0 030 781, DE-A 3 409 236).
  • the invention has for its object to provide a valve lifter according to claim 1, the first part, which manages with as few individual parts as possible and in which particularly complex connection methods, e.g. Welding processes are largely avoided.
  • the first part, the inner part made of polymeric material has two cylindrical walls arranged concentrically to one another, one of which bears tightly against the bore wall of the hollow cylindrical wall of the housing, while the the other forms the guide sleeve for the actual play compensation element, and the two are connected to one another at least at their ends facing away from the bottom of the housing in a liquid-tight manner by a radial flange, and tube-like channels are provided on the facing surfaces of the two cylindrical walls, of which the one on the radially outer cylindrical wall arranged channel at its end adjacent to the bottom of the housing opens freely into an outer oil storage space surrounding the guide sleeve and ends at its opposite end in a radial opening which is connected to a radial oil supply ng covers in the hollow cylindrical wall of the housing, while the channel arranged on the guide sleeve ends at its end adjacent to the bottom of the housing in a radial opening which opens into the interior of the guide sleeve
  • cup-shaped housing which can be made of metal as a whole
  • all other individual parts are combined to form an inner part made of polymer material, which has the advantage that, in the structural design, this can be e.g.
  • the inner part produced in the injection molding process is very free and connections, in particular welded connections, can be largely avoided.
  • the tube-like channels provided on the mutually facing surfaces of the two cylindrical walls can extend axially at one circumferential location.
  • the seal between the cylindrical wall forming the guide sleeve and the bottom of the housing can be omitted if the two cylindri walls are additionally connected to each other at their ends facing the bottom of the housing in a liquid-tight manner by means of a radial flange.
  • the inner part such that a part of it, which consists of the two cylindrical walls, the radial flange facing the bottom of the housing and the two channels, is molded directly into the metallic housing during its production by injection molding and the other radial flange subsequently, e.g. by welding, is attached to it.
  • a variant of the embodiment according to the invention is that the inner part made of polymeric material is formed from two parts, each of which consists of concentrically arranged cylindrical walls, which are connected to one another by a radial flange, which are joined together in a box-like manner that in each case two mutually corresponding walls of the two parts lie against one another in a liquid-tight manner with prestress, with corresponding recesses being provided in at least one of the surfaces of the cylindrical walls in contact with one another in order to form the channels.
  • the recesses can be designed as a helical spiral.
  • one part which forms the guide sleeve and which is therefore subjected to relatively high mechanical stresses, from a relatively hard polymeric material, in particular with the addition of reinforcing fibers, while the other part, which forms the seal compared to the metallic housing, is formed from an elastomer or an elastomer-like material.
  • the two parts can be positively snapped together by means of radially overlapping sections.
  • the entire inner part can be snapped into a corresponding recess in the hollow cylindrical wall of the metallic housing by means of a radial projection.
  • the plunger shown in Fig. 1 consists of the cup-shaped housing 1, which is formed from the hollow cylindrical wall 2 and the bottom 3 thus integral.
  • the inner part 4 is housed of polymeric material, which consists of the two concentrically arranged cylindrical walls 5 and 6, of which the wall 5 bears against the hollow cylindrical wall 2, while the wall 6 is the guide sleeve for the actual hydraulic Game compensation element 7 forms.
  • the two walls 5 and 6 are connected at their end facing away from the bottom 3 of the housing 1 by the radial flange 8 in a liquid-tight manner.
  • the hydraulic lash adjuster 7 consists of the outer piston 9, which is slidably guided in the metallic guide bush 10, which is accommodated in a form-fitting manner in the cylindrical wall 6, and which, in turn, slidably receives the inner piston 11 with tight play.
  • This has at its end facing the bottom a central oil reservoir 12 which is in fluid communication with an annular space 14 by means of the recess 13 in the inner surface of the bottom 3, which is delimited by the inner piston 11 on the one hand and the cylindrical wall 6 on the other.
  • axially extending tube-like channels 15 and 16 are provided at each circumferential location, of which the channel 15 opens freely into the outer oil storage space 17 on the cylindrical wall 5 at its end adjacent to the floor and ends at its opposite end in a radial opening 18, which coincides with a radial oil supply bore 19 in the hollow cylindrical wall 2, while the channel 16 arranged on the wall 6 ends at its end adjacent to the bottom of the housing in a radial opening 20, which opens into the annular space 14 and is open at its opposite end to the outer oil storage space 17.
  • the wall 6 is sealed at its end facing the floor 3 by means of a seal 21 from the metallic housing.
  • the wall 5 is at its end facing away from the bottom 3 by means of the sealing ring 22 opposite the Wall 2 sealed.
  • the seal 22 is prestressed by the metallic locking ring 23, which is inserted into the circumferential groove 24 of the hollow cylindrical wall 2.
  • an opening for introducing the molding tool is provided in the radial flange 8, which opening was subsequently closed by an inserted plate 25.
  • FIGS. 3 and 4 differs from the previous one in some respects.
  • an additional radial flange 26 was provided, which additionally connects the two cylindrical walls 5 and 6 to one another in a liquid-tight manner at their ends facing the bottom 3 of the housing 1. This measure makes it possible to dispense with the additional arrangement of the seal 21.
  • the component, which consists of the cylindrical walls 5 and 6, the radial flange 26 and the channels 15 and 16, was produced by molding it directly into the metallic housing 1 by injection molding and by the further radial flange being an annular plate 27 is trained, the retrofitted and z. B. was connected by ultrasonic welding to the other part.
  • an anti-rotation device was provided between the housing 1 and the inner part, which was accomplished in that a projection 28 on the inner part 4 engages in a recess 29 in the base 3.
  • the anti-rotation device was brought about by the fact that when the material is injected to form the inner part 4 in the housing 1, this material engages at one or more circumferential locations in radial bores 30 of the wall 2.
  • the inner part 4 consisting of polymer material is formed from two parts 31 and 32, each of which consists of two walls 33, 34 and 35, 36 arranged concentrically to one another, each at its ends by a radial flange 37, 38 are interconnected.
  • These two parts 31 and 32 are inserted into one another in a box-like manner in such a way that two walls 32, 34 and 33, 35 of the two parts which correspond to one another each lie against one another in a liquid-tight manner with prestress.
  • Corresponding recesses are provided in the cylindrical walls 32 and 33 to form the channels 15 and 16.
  • the channels 15 and 16 can be designed as a helical spiral.
  • the two parts forming the inner part 4 are positively snapped into one another for the purpose of their mutual axial securing.
  • the wall 32 overlaps the inner part with a projection 39 in its bore at its free end.
  • the wall 32 has a projection 40 on its outer jacket, which is snapped into a recess 41 in the wall 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP87111152A 1986-08-22 1987-08-01 Sich selbsttätig hydraulisch einstellender Ventilstössel Expired - Lifetime EP0257354B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863628619 DE3628619A1 (de) 1986-08-22 1986-08-22 Sich selbsttaetig hydraulisch einstellender ventilstoessel
DE3628619 1986-08-22

Publications (2)

Publication Number Publication Date
EP0257354A1 EP0257354A1 (de) 1988-03-02
EP0257354B1 true EP0257354B1 (de) 1990-05-30

Family

ID=6308004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87111152A Expired - Lifetime EP0257354B1 (de) 1986-08-22 1987-08-01 Sich selbsttätig hydraulisch einstellender Ventilstössel

Country Status (6)

Country Link
US (1) US4782799A (ja)
EP (1) EP0257354B1 (ja)
JP (1) JPS6357803A (ja)
BR (1) BR8704324A (ja)
DE (2) DE3628619A1 (ja)
ES (1) ES2015017B3 (ja)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3810436A1 (de) * 1988-03-26 1989-10-12 Schaeffler Waelzlager Kg Sich selbsttaetig hydraulisch einstellender ventilstoessel
DE3812333A1 (de) * 1988-04-14 1989-10-26 Schaeffler Waelzlager Kg Sich selbsttaetig hydraulisch einstellender ventilstoessel
IT1229355B (it) * 1989-05-23 1991-08-08 Eaton Automotive Spa Punteria idraulica con circolazione dell'olio lungo un percorso sviluppantesi per 360[ su due livelli.
US5245958A (en) * 1990-11-08 1993-09-21 General Motors Corporation Direct acting hydraulic valve lifter
US5119774A (en) * 1990-11-08 1992-06-09 General Motors Corporation Direct acting hydraulic valve lifter
US5230308A (en) * 1990-11-08 1993-07-27 General Motors Corporation Low mass direct acting hydraulic valve lifter
DE4115669A1 (de) * 1991-05-14 1992-11-19 Bayerische Motoren Werke Ag Herstellverfahren fuer einen ventilstoessel mit einem spiel-ausgleichselement
DE4115668A1 (de) * 1991-05-14 1992-11-19 Bayerische Motoren Werke Ag Ventilbetaetigungs-stoessel mit einem hydraulischen spiel-ausgleichselement
JP2802329B2 (ja) * 1992-01-16 1998-09-24 株式会社ダイモ社 構造物の円形切断方法及びその装置
DE4209440A1 (de) * 1992-03-24 1993-09-30 Schaeffler Waelzlager Kg Tassenstößel mit hydraulischem Ventilspielausgleich
EP0591533A4 (en) * 1992-04-27 1994-10-19 Nittan Valva DIRECT EFFECT HYDRAULIC PUSHBUTTON ADJUSTMENT DEVICE.
DE19603916A1 (de) * 1996-02-03 1997-08-07 Schaeffler Waelzlager Kg Stößel für den Ventiltrieb einer Brennkraftmaschine
US8919312B2 (en) 2012-06-27 2014-12-30 Ford Global Technologies, Llc Impact dampening tappet

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3006644A1 (de) * 1980-02-22 1981-09-03 Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt Ventilstoessel fuer brennkraftmaschinen mit obenliegender nockenwelle
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
JPS5965508A (ja) * 1982-10-08 1984-04-13 Aisin Seiki Co Ltd Ｏｈｃダイレクトタイプ用油圧リフタ
EP0140674A3 (en) * 1983-10-28 1986-05-28 Eaton Corporation Lash adjuster with embedded wear face
US4688526A (en) * 1983-12-07 1987-08-25 Eaton Corporation Self-contained hydraulic bucket lifter
DE3409235A1 (de) * 1984-03-14 1985-09-19 Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt Aeusseres fuehrungsteil fuer einen ventilstoessel fuer verbrennungskraftmaschinen
JPS60157907U (ja) * 1984-03-28 1985-10-21 アイシン精機株式会社 ダイレクト式油圧リフタ
DE3412175A1 (de) * 1984-03-31 1985-10-10 Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt Tassenfoermiges gehaeuse eines sich selbsttaetig hydraulisch einstellenden ventilstoessels fuer brennkraftmaschinen mit obenliegender nockenwelle
IT1180083B (it) * 1984-07-24 1987-09-23 Riv Officine Di Villar Perosa Punteria idraulica a tenuta stagna per il comando del moto di una valvola di un motore endotermico
DE3437478A1 (de) * 1984-10-12 1986-04-17 INA Wälzlager Schaeffler KG, 8522 Herzogenaurach Sich selbsttaetig hydraulisch einstellender ventilstoessel
DE3500425A1 (de) * 1985-01-09 1986-07-10 Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt Hydraulischer tassenstoessel fuer verbrennungsmotoren
DE3511501A1 (de) * 1985-03-29 1986-10-09 Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt Hydraulischer tassenstoessel fuer verbrennungsmotoren
JPH0746723Y2 (ja) * 1985-06-20 1995-10-25 日産自動車株式会社 油圧バルブリフタ−
DE3528348A1 (de) * 1985-08-07 1987-02-19 Daimler Benz Ag Hydraulischer tassenstoessel fuer einen ventiltrieb von brennkraftmaschinen

Also Published As

Publication number Publication date
DE3762982D1 (de) 1990-07-05
DE3628619A1 (de) 1988-03-03
BR8704324A (pt) 1988-04-19
EP0257354A1 (de) 1988-03-02
US4782799A (en) 1988-11-08
ES2015017B3 (es) 1990-08-01
JPS6357803A (ja) 1988-03-12

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