EP0515771B1 - Stössel für den Ventriltrieb einer Verbrennungskraftmaschine - Google Patents

Stössel für den Ventriltrieb einer Verbrennungskraftmaschine Download PDF

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Publication number
EP0515771B1
EP0515771B1 EP92101924A EP92101924A EP0515771B1 EP 0515771 B1 EP0515771 B1 EP 0515771B1 EP 92101924 A EP92101924 A EP 92101924A EP 92101924 A EP92101924 A EP 92101924A EP 0515771 B1 EP0515771 B1 EP 0515771B1
Authority
EP
European Patent Office
Prior art keywords
housing
tappet
guide ring
valve
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
EP92101924A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0515771A1 (de
Inventor
Klaus Döhring
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg KG
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Filing date
Publication date
Application filed by Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP0515771A1 publication Critical patent/EP0515771A1/de
Application granted granted Critical
Publication of EP0515771B1 publication Critical patent/EP0515771B1/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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • 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
    • 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 tappet for the valve train of an internal combustion engine, consisting of an essentially cup-shaped housing which can be slipped onto the valve stem of a valve, the housing consisting at least in the radial direction on the outside of polymer material and in the radial direction on the outside at least at one point is enclosed by a guide ring.
  • the outer guide part of the valve tappet for internal combustion engines comprises a base made of wear-resistant material which interacts with the cam of the camshaft and a hollow cylindrical shaft part made of a sprayable polymer material which slides in the guide bore of the cylinder head.
  • a thin-walled reinforcement element drawn from sheet metal is provided, to which the base can be fastened and which is fixed in the radial direction on the inside in the shaft part.
  • a tappet for valve control in particular for motor vehicle engines, which consists of a cylindrical sleeve made of plastic, one end of the sleeve being closed by a metal disk.
  • the outer circumference of the sleeve which forms the sliding surface and can be moved to and fro in the axial direction in a guide bore in the cylinder head, exhibits increased wear in the region of its axial limits, particularly in the case of a long service life.
  • a tappet which comprises a housing made of metallic material, which results in a high mass of the valve train to be accelerated.
  • the mass of a valve train to be accelerated is a very critical quantity, into which the tappet mass is directly involved. Due to the comparatively high mass of the tappet, the valve spring is extremely heavily loaded, especially at higher speeds. In addition, the mass of the valve train to be accelerated also increases the wear in the area of the tappet guides and the housing base, on which the camshaft acts.
  • the invention has for its object to show a plunger both in an open form with or without hydraulic valve lash compensation and a plunger in a closed form with hydraulic valve lash compensation, which reduces the forces acting in the valve train by a low mass, thereby reducing the load on the valve train Components reduced and, due to the lower wear, provides better performance characteristics over a longer service life.
  • the plunger should be easy and inexpensive to manufacture.
  • the object is achieved according to the invention in a plunger of the type mentioned in the introduction that the housing and the guide ring can be produced independently of one another, that the guide ring has a circumferential cut and that the guide ring is snapped into a guide groove of the housing under elastic pretension.
  • the weight of all cup-shaped tappets can be significantly reduced, which means that with constant tappet acceleration, less force is exerted on the moving parts and therefore less wear, or with the same force, the tappet and the valve adjacent to it can be accelerated, which results in better filling of the Combustion chambers and thus an improved efficiency of the internal combustion engine results.
  • the advantage here is that a high-quality and wear-resistant and therefore usually expensive material is only used where it is really necessary due to the wear that occurs.
  • the main structure of the plunger can be made of inexpensive, light material, since there are no requirements for wear resistance of the base material outside the running surfaces and the other stressed zones. Due to the rotating movement of the cam, the tappet performs a not exclusively translatory movement. During the intended use of the plunger, tilting moments also occur, as a result of which the load along the running surface of the wooden cylinder part running in the axial direction is different. The greatest load in terms of wear lies in the area closest to the cam. The second highest load results in the area which is furthest away from the cam in the axial direction, while the area between these two points is the least loaded.
  • the guide ring can consist of a polymer material with high wear resistance as well as a metallic material. Even when using a guide ring made of metallic material, there is only an insignificant increase in the mass of the ram to be accelerated due to the small thickness of the guide ring.
  • the structural strength of the plunger is provided by the inexpensive plastic with a low specific weight, while the wear resistance and thus the good properties of use are ensured by the guide rings over a long period of use.
  • the guide ring can be perforated and consist of stamped sheet steel, for example. It is inserted into the tool for producing the plunger and overmolded with plastic, so that the plastic of the base body fills the openings and transmits the thrust forces that occur during the intended use both by positive locking and by adhesion.
  • the housing and / or the guide ring can be provided with lubricant pockets which are open outward in the radial direction.
  • the treads on the outside in the radial and / or axial direction can be provided with a plasma coating.
  • the tread of the tappet on the outside in the radial direction which is moved relative to the guide bore in the cylinder head, is subject to wear.
  • the tread can be coated with a layer of wear-resistant material by means of a plasma coating, as a result of which the plunger is protected against wear. With an insignificant increase in the total mass compared to an uncoated but more prone to wear, the wear-critical surface would be protected.
  • the housing can be formed in two parts and limited in the axial direction by a housing base made of a metallic or ceramic material. If the valve stem acts directly on the housing base, make sure that the housing base of the tappet is connected to the hollow cylindrical counterpart of the housing as a counter-rotor to the cam so that both compressive and tensile forces can be transmitted.
  • the pressure on the housing base is exerted on pressure by the cam which is adjacent on the outside in the axial direction and which moves the tappet in the axial direction to open the valve.
  • Tensile loads act on the case base by closing the inside to the housing bottom of the adjacent valve by the valve spring when it is supported on the one hand in the cylinder head and on the other hand in the tappet housing. This is usually supported on the one hand in the cylinder head and on the other hand in the tappet housing.
  • Metallic or ceramic materials are particularly suitable for the housing base due to their good wear resistance and comparatively low thermal expansion.
  • FIGS. 1 show the individual components of bucket tappets to be taken into account, both in open form with or without hydraulic valve lash adjustment and in closed form with hydraulic valve lash adjustment, partly in a schematic representation:
  • Figures 1, 2, 3 and 4 show weight-optimized bucket tappets in an open form without hydraulic valve clearance compensation and / or individual components which are advantageous for advantageous usage properties.
  • FIG. 5 shows a weight-optimized cup tappet in the closed form with hydraulic valve clearance compensation.
  • the housing 1 consists at least in the radial direction on the outside of a polymeric material, the housing 1 being enclosed on the outside in at least one place in the radial direction with a guide ring 3.
  • a weight-optimized tappet is shown, in an open form without hydraulic valve clearance compensation. Thereafter, it is provided that the housing 1 is formed in two parts, the axial running surface 1.2 being formed by a housing base 2 made of metallic or ceramic material.
  • the Radial tread 1.1 is formed in the highly stressed areas of the housing 1 by guide rings which surround the housing 1 on the outside in the radial direction.
  • the tappet has two comparatively highly stressed areas in the area of its radial running surfaces. Due to the tilting moments that act on the tappet due to the rotating camshaft, the areas that are subject to the highest stress are located most towards the housing base and away from the housing base. The stress between these two areas is less great.
  • the tappet has a lower weight than previously known tappets because the base body of the housing 1 consists of a light, polymeric material.
  • the guide rings 3 can, for example, also, like the housing base, consist of metallic material or be formed by a polymeric material which meets the requirements with regard to good performance characteristics over a long service life. Even when using particularly expensive materials or materials with a higher density and therefore a higher weight, such as metal, the total weight of the ram is hardly affected, since the corresponding amounts are only very small.
  • FIG. 2 shows the basic body of the housing 1 with an inserted housing base 2.
  • the guide grooves 4, in which the guide rings 3 according to FIG. 1 are fixed can be seen particularly well.
  • the guide rings 3 can be fixed in the guide grooves 4 of the housing 1, for example, by snapping in and / or gluing.
  • FIG. 3 A guide ring 3 according to FIG. 1 is shown in FIG. 3.
  • the guide ring 3 has openings 3.1, which can be circular, for example.
  • FIG. 4 shows a plunger similar to that described in FIG. 1, the radial running surface 1.1 being formed by a preformed plate which has a similar shape to the guide ring 3 shown in FIG. 3.
  • the radial running surface 1.1 of the preformed plate can have openings, for example have or be designed consistently.
  • the housing base 2 is as with the two-part tappets described so far connected to the base body of the housing 1 that it can transmit both compressive and tensile forces.
  • FIG. 5 shows a cup tappet in closed form with hydraulic valve clearance compensation, the housing 1 of which, along its radial running surface 1.1, has guide rings 3 in the areas subject to greater stress, which are shown here without openings.
  • Both the base body of the housing 1 and the guide part 5, which receives the displacement body 6 made of closed-cell foam, for example polyurethane or silicone, are formed by polymeric material. Due to the significantly larger number of moving parts compared to open cup tappets without hydraulic valve lash compensation, the use of polymeric materials for weight optimization of tappets is particularly advantageous in the case of components designed in this way.
  • FIGS. 1 to 5 merely represent examples, the individual features of which can also be combined with one another.
  • plasma-coated, radial treads are also conceivable, which are combined with a housing base 2 made of metallic or ceramic material.
  • All guide rings can also be designed with or without openings and / or with or without lubricant pockets.
  • the basic idea is, according to the respective requirements, to use different materials at different points in the housing in such a way that there is a substantial reduction in the tappet mass, which can either reduce the forces occurring in the valve train or, through greater accelerations, better filling and better efficiency the internal combustion engine can be achieved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Housings (AREA)
EP92101924A 1991-05-28 1992-02-05 Stössel für den Ventriltrieb einer Verbrennungskraftmaschine Expired - Lifetime EP0515771B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4117425 1991-05-28
DE4117425A DE4117425C1 (ja) 1991-05-28 1991-05-28

Publications (2)

Publication Number Publication Date
EP0515771A1 EP0515771A1 (de) 1992-12-02
EP0515771B1 true EP0515771B1 (de) 1995-04-12

Family

ID=6432620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92101924A Expired - Lifetime EP0515771B1 (de) 1991-05-28 1992-02-05 Stössel für den Ventriltrieb einer Verbrennungskraftmaschine

Country Status (6)

Country Link
US (1) US5228418A (ja)
EP (1) EP0515771B1 (ja)
JP (1) JP2634988B2 (ja)
AT (1) ATE121165T1 (ja)
DE (2) DE4117425C1 (ja)
ES (1) ES2073791T3 (ja)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2678347B1 (fr) * 1991-06-28 1994-01-14 Ceramiques Composites Poussoir de soupape a base d'un materiau plastique et eventuellement de ceramique.
DE4203897C2 (de) * 1992-02-11 1994-01-27 Freudenberg Carl Fa Hydraulisches Ventilspielausgleichselement
DE4412298C2 (de) * 1994-04-09 1996-05-23 Daimler Benz Ag Steuerkolben für eine Motorbremseinrichtung an einer Brennkraftmaschine
DE9408058U1 (de) * 1994-05-16 1994-07-14 Schaeffler Waelzlager Kg Stößel für einen Ventiltrieb einer Brennkraftmaschine
JP3227634B2 (ja) * 1994-11-16 2001-11-12 フジオーゼックス株式会社 内燃機関用タペットおよびその製造方法
DE29501151U1 (de) * 1995-01-25 1995-03-02 Schaeffler Waelzlager Kg Stößel mit einer geteilten Hemdfläche
US5729900A (en) * 1996-05-06 1998-03-24 Fuji Oozx, Inc. Method of manufacturing a tappet in an internal combustion engine
JPH1077807A (ja) * 1996-09-05 1998-03-24 Fuji Oozx Inc 内燃機関用タペットの製造方法
US5839402A (en) * 1997-07-29 1998-11-24 Fuji Oozx Inc. Wear resistant tappet
DE19958314A1 (de) * 1999-12-03 2001-06-07 Mahle Ventiltrieb Gmbh Rollenstößel
DE10358934A1 (de) * 2003-12-12 2005-07-07 Bayerische Motoren Werke Ag Ventilstößel für Verbrennungsmotoren
DE102005026504A1 (de) 2005-06-09 2006-12-14 Schaeffler Kg Führungsleiste für den Ventiltrieb einer Brennkraftmaschine
DE102006051256A1 (de) * 2006-10-31 2008-05-08 Schaeffler Kg Ventiltriebs-Hebel für eine Brennkraftmaschine
EP3176393B1 (en) * 2015-12-03 2018-06-13 Aktiebolaget SKF Cam follower roller device with spacer and improved wear resistance
US9822671B2 (en) 2016-03-02 2017-11-21 Ford Global Technologies, Llc Composite hybrid cam carrier

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3545415A (en) * 1967-04-08 1970-12-08 Nippon Piston Ring Co Ltd Valve lifter with thin plastic coating
FR2129420A5 (ja) * 1971-03-08 1972-10-27 Cigala & Bertinetti Sas
FR2226434A1 (en) * 1973-04-23 1974-11-15 Union Carbide Corp Free-flowing fine polymer coating powders for thin films - esp for electrostatic spraying, by pptg from sprayed polymer solns
JPS5266580A (en) * 1975-11-29 1977-06-02 Sumitomo Chemical Co Method of powder coating of plastic article
US4768476A (en) * 1981-02-20 1988-09-06 Stanadyne, Inc. Tappet with ceramic camface
JPS57153912A (en) * 1981-03-17 1982-09-22 Mazda Motor Corp Pad for tappet of internal combustion engine
JPS58185913A (ja) * 1982-04-24 1983-10-29 Yamaha Motor Co Ltd 内燃機関の動弁装置
JPS58210308A (ja) * 1982-05-31 1983-12-07 Yamaha Motor Co Ltd 動弁用タペツトの軽量化構造
US4430970A (en) * 1982-06-11 1984-02-14 Standard Oil Company (Indiana) Composite tappet
JPS60180969A (ja) * 1984-02-28 1985-09-14 日本碍子株式会社 エンジン部品およびその製造法
DE3409235A1 (de) * 1984-03-14 1985-09-19 Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt Aeusseres fuehrungsteil fuer einen ventilstoessel fuer verbrennungskraftmaschinen
DE3519015C2 (de) * 1985-05-25 1996-04-11 Schaeffler Waelzlager Kg Ventilstößel für Verbrennungskraftmaschinen
FR2584138B1 (fr) * 1985-06-28 1989-08-04 Inst Francais Du Petrole Poussoir hydraulique comportant des parties ceramiques pour moteurs thermiques
DE3627505C2 (de) * 1986-08-13 1995-04-06 Motomak Sich selbsttätig hydraulisch einstellender Ventilstößel
JPS63109151A (ja) * 1986-10-27 1988-05-13 Hitachi Ltd 高硬度複合材およびその製造方法
JPH055202Y2 (ja) * 1987-12-21 1993-02-10
US4909198A (en) * 1988-03-01 1990-03-20 Toyota Jidosha Kabushiki Kaisha Aluminum alloy valve lifter with sprayed coating and method of producing same
DE3809702A1 (de) * 1988-03-23 1989-10-05 Schaeffler Waelzlager Kg Bauteil im ventilsteuertrieb einer brennkraftmaschine
DE3814362C1 (en) * 1988-04-28 1989-12-07 Thyssen Guss Ag, 4330 Muelheim, De Process for producing bucket tappets and similarly stressed components in internal combustion engines
JPH02241913A (ja) * 1989-03-13 1990-09-26 Toyota Motor Corp バルブリフタ
GB9011125D0 (en) * 1990-05-17 1990-07-04 T & N Technology Ltd Tappets

Also Published As

Publication number Publication date
ATE121165T1 (de) 1995-04-15
US5228418A (en) 1993-07-20
ES2073791T3 (es) 1995-08-16
DE4117425C1 (ja) 1992-07-30
DE59201873D1 (de) 1995-05-18
EP0515771A1 (de) 1992-12-02
JPH05156905A (ja) 1993-06-22
JP2634988B2 (ja) 1997-07-30

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