EP0179323B1 - Sich selbsttätig hydraulisch einstellender Ventilstössel - Google Patents

Sich selbsttätig hydraulisch einstellender Ventilstössel Download PDF

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Publication number
EP0179323B1
EP0179323B1 EP85112507A EP85112507A EP0179323B1 EP 0179323 B1 EP0179323 B1 EP 0179323B1 EP 85112507 A EP85112507 A EP 85112507A EP 85112507 A EP85112507 A EP 85112507A EP 0179323 B1 EP0179323 B1 EP 0179323B1
Authority
EP
European Patent Office
Prior art keywords
guide sleeve
housing
cylindrical guide
valve tappet
hollow cylindrical
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
Application number
EP85112507A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0179323A1 (de
Inventor
Georg Dr. Ing. E.H. Schaeffler
Horst Dipl.-Ing. Klug (Fh)
Wolfgang Dipl.-Ing. Mocker
Walter Dipl.-Ing. Speil
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
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Application filed by INA Waelzlager Schaeffler OHG filed Critical INA Waelzlager Schaeffler OHG
Publication of EP0179323A1 publication Critical patent/EP0179323A1/de
Application granted granted Critical
Publication of EP0179323B1 publication Critical patent/EP0179323B1/de
Expired 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 consisting of two basic components consists, on the one hand, of a cup-shaped housing, 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 on the other hand, of a cylindrical guide sleeve which is concentric with the hollow cylindrical wall and which is in the center of a disk part is arranged, which merges with its outer circumference into the hollow cylindrical wall of the housing, whereby an annular oil reservoir is limited between the hollow cylindrical wall and the cylindrical guide sleeve, which is defined by an outwardly leading hole tion is supplied with oil, the actual hydraulic lash adjuster being longitudinally displaceably guided in the guide sleeve, which is formed by an
  • cup tappets are known (DE-A-30 23 686).
  • the actual hydraulic play compensation element is formed by a single piston, which is arranged to be longitudinally displaceable in the guide sleeve, and which limits a pressure space with the latter.
  • the guide sleeve extends from the bottom of the housing and is either integrally formed with it or is at least connected pressure-tight.
  • the tappet components are cast or extruded parts, which has the disadvantage that the mass of the valve tappet is disadvantageously increased (DE-A-27 58 957 ).
  • cup tappets of the first-mentioned type, to which the present invention belongs have recently been used. Since one always sought small wall thicknesses in such valve tappets for reasons of reducing the moving masses, which is why the housing of these tappets was preferably formed from drawn sheet metal parts, the inner part consisting of the disk part and the guide sleeve could also have only a limited stability, which in some circumstances can be seen in Continuous operation could lead to damage or even breakage due to the oscillations and vibrations that occur.
  • the invention has for its object to provide an automatically hydraulically adjusting valve tappet, which is formed from thin-walled, in particular sheet metal parts and / or plastic parts to achieve low mass, but which has a very high stability and furthermore an additional leakage protection for the central oil reservoir, and can have a further oil reservoir concentrically surrounding the central oil reservoir.
  • the cylindrical guide sleeve and the disc part is formed as a one-piece separate component which is connected to the hollow cylindrical wall of the housing at the radially outer edge of the disc part, and whose cylindrical guide sleeve extends to the bottom of the housing and is in contact with its inner surface.
  • this simple constructional and manufacturing measure ensures that a kind of box construction is formed as a result of the mutual support, which has increased stability even when the wall thickness is significantly reduced compared to the known designs.
  • At the end of the cylindrical guide sleeve facing the bottom enters the annular sleeve from the oil reservoir into the guide sleeve and thus into the actual play compensation element can.
  • at least one oil transfer opening can be provided, which is formed in that a recess is formed on one of the two surfaces in contact with one another.
  • This recess can either be designed as an end slot on the guide sleeve or as a recess or recess in the bottom of the housing.
  • this inner part can also be designed as a one-piece plastic part which is connected by a snap connection to the hollow cylindrical wall of the housing.
  • the tappet construction according to the invention can be further increased in terms of its stability by the fact that the end of the cylindrical guide sleeve facing the bottom of the housing engages positively in a groove in the bottom.
  • the plunger shown in Figure 1 consists of the cup-shaped housing 1, which consists of the hollow cylindrical wall 2 and the bottom 3 thus integral.
  • an inner part 4 is arranged, which is formed from the disc part 5 and the cylindrical guide sleeve 6.
  • the parts 5 and 6 form an angle with one another which is greater than 90 °.
  • these two parts are firmly connected to one another by crimping.
  • additional welding, soldering or the like is possible at this point.
  • the disk part 5 lies against the circumferential groove 8 formed in the hollow cylindrical wall 2 and, on the other hand, is covered by the bead 9 formed out of the hollow cylindrical wall.
  • the cylindrical guide sleeve 6 is supported on the end against the inner surface 10 of the base 3. In this end region, the guide sleeve 6 has an enlarged inner diameter 11 in order to provide space for a plate washer 12, with which the hydraulic play compensation element 13 is secured against slipping out of the bore of the guide sleeve 6.
  • annular cavity which is delimited by the hollow cylindrical wall 2, the disk part 5, the cylindrical guide sleeve 6 and the inner surface 10 of the base 3, forms an annular oil reservoir 14, which is supplied with oil from the outside through the bore 15 arranged in the circumferential groove 8 can.
  • the hydraulic lash adjuster 13 consists of the outer piston 16, which is slidably guided in the guide sleeve 6 and, on the other hand, slidably receives the inner piston 17 with tight play.
  • the latter At its end facing the floor 3, the latter has a central oil storage space 18, which is in fluid communication with the annular oil storage space 14 by means of the recesses 19 and 20 in the inner surface 11 of the floor 3. From the central oil reservoir 18, the oil can pass through the bore 21, which can be closed by the check valve 22, into the high-pressure oil chamber 23, which is delimited by the two pistons 16 and 17. Under the action of spring 24, these two pistons are pressed apart.
  • the lower end face 25 of the outer piston 16 In the installed state, the lower end face 25 of the outer piston 16 is in contact with the end face of the stem of an engine valve, while a control cam runs against the bottom 3 from the outside.
  • valve tappet The function of such a valve tappet can be assumed to be known. Compared to the known designs, this construction is new in that. the cylindrical guide sleeve 6 extends to the inner surface 10 of the base 3 and is supported there to increase the stability. This support can be achieved in that when the cup-shaped housing 1 is assembled with the inner part 4, the latter is placed under axial prestress. However, it is also possible to add the two parts additionally at the contact point between the guide sleeve 6 and inner surface 10 to connect.
  • FIG. 2 The main difference between FIG. 2 and FIG. 1 is that the cylindrical guide sleeve 6 is widened to a larger diameter at its end region 26 facing the bottom 3, which means that in addition to the outer annular oil storage space 14 and the central oil storage space 18, an additional central annular oil storage space is provided 27 results. Even if the outer annular oil reservoir 14 were to run empty when the engine was at a standstill, the oil would be retained in the oil reservoir 18 and 27 and would be available when the engine was started. Because the two recesses 19 and 20 are arranged in the base 3 at diametrically opposite locations, the oil reservoir 18 could not run empty even when the plunger is in an inclined position.
  • the tappet according to FIG. 3 also has the feature that the cylindrical guide sleeve 6 or its end region 26 facing the floor engages in a circumferential groove 28 of the base 3, which additionally increases the stability of the entire tappet.
  • FIG. 3 shows an embodiment in which the entire inner part 34 is designed as a one-piece molded plastic part, which is connected to the hollow cylindrical wall 2 of the housing 1 by a snap connection 35.
  • This version in which a plastic part is used, not only has the advantage that this part is relatively easy to manufacture in any shape and is also of low mass, but also that it is particularly well suited to dampen vibrations and vibrations.
  • one (or both) of the recesses in the base 3 can also be replaced by a through slot 36 provided in the guide sleeve on the end face thereof.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP85112507A 1984-10-12 1985-10-03 Sich selbsttätig hydraulisch einstellender Ventilstössel Expired EP0179323B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3437478 1984-10-12
DE3437478A DE3437478A1 (de) 1984-10-12 1984-10-12 Sich selbsttaetig hydraulisch einstellender ventilstoessel

Publications (2)

Publication Number Publication Date
EP0179323A1 EP0179323A1 (de) 1986-04-30
EP0179323B1 true EP0179323B1 (de) 1989-01-11

Family

ID=6247754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85112507A Expired EP0179323B1 (de) 1984-10-12 1985-10-03 Sich selbsttätig hydraulisch einstellender Ventilstössel

Country Status (6)

Country Link
US (1) US4709668A (enrdf_load_stackoverflow)
EP (1) EP0179323B1 (enrdf_load_stackoverflow)
JP (1) JPS6196109A (enrdf_load_stackoverflow)
BR (1) BR8505066A (enrdf_load_stackoverflow)
DE (2) DE3437478A1 (enrdf_load_stackoverflow)
ES (1) ES289539Y (enrdf_load_stackoverflow)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3528432A1 (de) * 1985-08-08 1987-02-19 Motomak Sich selbsttaetig hydraulisch einstellender ventilstoessel
DE3542192A1 (de) * 1985-11-29 1987-06-04 Schaeffler Waelzlager Kg Sich selbsttaetig hydraulisch einstellender ventilstoessel
DE3628619A1 (de) * 1986-08-22 1988-03-03 Schaeffler Waelzlager Kg Sich selbsttaetig hydraulisch einstellender ventilstoessel
DE3637906A1 (de) * 1986-11-06 1988-05-19 Schaeffler Waelzlager Kg Sich selbsttaetig hydraulisch einstellender ventilstoessel
DE3639911A1 (de) * 1986-11-22 1988-06-01 Schaeffler Waelzlager Kg Sich selbsttaetig hydraulisch einstellender ventilstoessel
DE3704929A1 (de) * 1987-02-17 1988-08-25 Daimler Benz Ag Tassenstoessel mit hydraulischem spielausgleich
JPH01173303U (enrdf_load_stackoverflow) * 1988-01-14 1989-12-08
DE3810436A1 (de) * 1988-03-26 1989-10-12 Schaeffler Waelzlager Kg Sich selbsttaetig hydraulisch einstellender ventilstoessel
JPH0249910A (ja) * 1988-08-10 1990-02-20 Nippon Seiko Kk 逆バケット型ハイドロリックバルブリフタおよびその製造方法
US4924821A (en) * 1988-12-22 1990-05-15 General Motors Corporation Hydraulic lash adjuster and bridge assembly
DE8902780U1 (de) * 1989-03-08 1989-04-20 INA Wälzlager Schaeffler KG, 8522 Herzogenaurach Sich selbsttätig hydraulisch einstellender Ventilstößel
JPH02126005U (enrdf_load_stackoverflow) * 1989-03-28 1990-10-17
JPH0331504A (ja) * 1989-06-27 1991-02-12 Fuji Valve Co Ltd 油圧式バルブラッシュアジャスタ
EP0568157B1 (en) * 1992-05-01 1995-03-01 General Motors Corporation Low-mass, direct-acting hydraulic valve-lifter
US5280771A (en) * 1992-09-23 1994-01-25 Eaton Corporation Direct acting hydraulic tappet
DE4340035B4 (de) * 1992-12-10 2006-02-23 Ina-Schaeffler Kg Mechanischer Tassenstößel
DE4444481A1 (de) * 1994-12-14 1996-06-20 Schaeffler Waelzlager Kg Stößel mit einem hydraulischen Ventilspielausgleichselement
US5622147A (en) * 1996-03-08 1997-04-22 Eaton Corporation Hydraulic lash adjuster

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1241634A (en) * 1968-04-19 1971-08-04 Motomak Valve tappet for engines having an overhead camshaft
US3509858A (en) * 1968-05-20 1970-05-05 Gen Motors Corp Overhead cam valve lifter
DE2758957A1 (de) * 1977-12-30 1979-07-05 Wizemann Gmbh U Co J Hydraulischer tassenstoessel
DE2941084A1 (de) * 1979-10-10 1981-04-23 Fritz Gotthold 6453 Seligenstadt Rottluff Hydraulischer tassenstoessel mit hydrodynamischer entlueftung
DE2948669A1 (de) * 1979-12-04 1981-06-11 Fritz Gotthold 6453 Seligenstadt Rottluff Entlueftbarer hydro-tassenstoessel
US4367701A (en) * 1979-12-05 1983-01-11 Eaton Corporation Acting valve gear
DE3072169D1 (de) * 1979-12-05 1990-01-18 Eaton Corp Hydraulischer ventilstoessel fuer eine direkt angetriebene ventilsteuerung.
US4590898A (en) * 1979-12-05 1986-05-27 Eaton Corporation Hydraulic tappet for direct-acting valve gear
DE3006644A1 (de) * 1980-02-22 1981-09-03 Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt Ventilstoessel fuer brennkraftmaschinen mit obenliegender nockenwelle
DE3023686A1 (de) * 1980-06-25 1982-01-14 Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt Aeusseres fuehrungsteil fuer einen ventilstoessel fuer brennkraftmaschinen mit obenliegender nockenwelle
US4430970A (en) * 1982-06-11 1984-02-14 Standard Oil Company (Indiana) Composite tappet
JPS5923008A (ja) * 1982-07-28 1984-02-06 Fuji Valve Kk 油圧タペットの本体成形法
JPS59102908U (ja) * 1982-12-27 1984-07-11 トヨタ自動車株式会社 内燃機関の油圧式リフタ装置

Also Published As

Publication number Publication date
US4709668A (en) 1987-12-01
BR8505066A (pt) 1986-07-29
JPS6196109A (ja) 1986-05-14
ES289539U (es) 1986-03-01
EP0179323A1 (de) 1986-04-30
JPH0517364B2 (enrdf_load_stackoverflow) 1993-03-09
DE3437478A1 (de) 1986-04-17
ES289539Y (es) 1986-10-01
DE3567500D1 (en) 1989-02-16

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