EP0187217B1 - Hydraulischer Tassenstössel für Verbrennungsmotoren - Google Patents

Hydraulischer Tassenstössel für Verbrennungsmotoren Download PDF

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Publication number
EP0187217B1
EP0187217B1 EP85114036A EP85114036A EP0187217B1 EP 0187217 B1 EP0187217 B1 EP 0187217B1 EP 85114036 A EP85114036 A EP 85114036A EP 85114036 A EP85114036 A EP 85114036A EP 0187217 B1 EP0187217 B1 EP 0187217B1
Authority
EP
European Patent Office
Prior art keywords
end plate
oil
wall
bore
closed
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
EP85114036A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0187217A1 (de
Inventor
Georg Dr. Ing. E.H. Dipl.-Kfm. Schaeffler
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.)
Motomak Motorenbau Maschinen und Werkzeugfabrik Konstruktionen GmbH
Original Assignee
Motomak Motorenbau Maschinen und Werkzeugfabrik Konstruktionen 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 Motomak Motorenbau Maschinen und Werkzeugfabrik Konstruktionen GmbH filed Critical Motomak Motorenbau Maschinen und Werkzeugfabrik Konstruktionen GmbH
Publication of EP0187217A1 publication Critical patent/EP0187217A1/de
Application granted granted Critical
Publication of EP0187217B1 publication Critical patent/EP0187217B1/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 a hydraulic tappet for internal combustion engines, consisting of a cup-shaped housing which has a tubular outer wall which is closed at one end by a bottom, and in the bore of which a cylindrical sleeve is supported, which preferably in the vicinity of the bottom in a funnel-shaped annular disc merges with a guide tube running coaxially to the outer wall in its bore, with a longitudinally extending oil guide channel being formed at a circumferential point between the outer wall and the cylindrical sleeve, starting from an oil supply hole provided in the outer wall and at the transition point from the cylindrical sleeve opens into the annular disc in an annular outer oil reservoir, which is delimited by the bottom of the housing, the annular disc and a hydraulic lash adjuster, which consists of an outer.
  • a longitudinally displaceable cylinder part which is closed at its end facing away from the bottom of the housing and which has a piston part which is guided in a longitudinally displaceable manner with little play and which consists of a hollow cylindrical jacket which has an intermediate wall with a through hole between its ends , which is closed by a check valve, and which is supported at one end against the inside of the bottom of the housing and thereby delimits a central oil reservoir upstream of the check valve, while its other end together with the cylinder part delimits an oil high-pressure chamber closed off by the check valve, and wherein at a circumferential point of the contact surface between the piston part and the bottom in the inner surface of the bottom there is provided a recess spanning the contact surface as an oil transfer opening.
  • both the mouth of the oil guide channel into the annular outer oil storage space and the oil transfer opening between the outer and the central oil storage space are on the same side of the longitudinal axis of the tappet, then there is a risk that these two storage spaces are at least partially empty can run when these openings come down during operation due to the inevitable rotation of the tappet and then the engine is switched off (DE-A 30 06 644).
  • the invention is based, to achieve durcn a simple constructive measure, which does not involve any additional manufacturing effort, that in all cases at least the central oil reservoir remains filled with oil.
  • the invention achieves this goal in that the mouth of the oil guide channel into the annular outer oil storage space on the one hand and the depression provided in the inner surface of the base on the other hand are diametrically opposed to one another. With this arrangement, at most the outer annular oil reservoir can run empty, but not the central oil reservoir, whose oil volume has the important task of being available to fill up the high-pressure oil chamber when the engine is restarted.
  • the cup tappet shown in Figure 1 consists of the cup-shaped housing 1, which has a tubular outer wall 2, which is closed at one end by a bottom 3.
  • a cylindrical sleeve 4 is supported, which merges in the vicinity of the bottom 3 into a funnel-shaped annular disc 5, which has a guide tube 6 running coaxially to the outer wall 2 in its bore.
  • a longitudinally extending oil guide channel 7 is formed at a circumferential point between the outer wall 2 and the cylindrical sleeve 4, which starts from an oil supply hole 8 provided in the outer wall 2 and has an opening 9 at the transition point from the cylindrical sleeve 4 into the annular disk 5, which leads into an annular outer oil reservoir 10, which is delimited by the base 3, the annular disc 5 and the hydraulic play compensation element 11.
  • This consists of the outer, in the guide tube 6 longitudinally guided cylinder part 12, which is closed at its end facing away from the bottom 3 of the housing 1, and which has a piston part 13 guided in its bore with little play.
  • This consists of the hollow cylindrical jacket 14, which has an intermediate wall 15 with a through bore 16 between its ends, which is formed by a ball check valve 17 is completed, and which is supported at one end against the inside of the bottom 3 of the housing 1 and thereby delimits a central oil reservoir 18 upstream of the check valve 17. Its other end, together with the cylinder part 12, delimits a high-pressure oil chamber 19 which is closed off by the check valve 17 3, a depression 20 is provided which overlaps this contact surface. This recess 20 is diametrically opposite the mouth 9.
  • FIGS. 2 and 3 show different embodiments for forming the oil guide channel 7 in partial cross sections.
  • the cylindrical sleeve 4 (as in FIG. 1) is provided at the corresponding circumferential point with a longitudinal bead 21 which, together with the cylindrical surface of the bore in the outer wall 2, delimits the oil guide channel 7.
  • a variant is shown in Figure 3, in which the cylindrical sleeve 4 is also cylindrical in the region of the oil guide channel 7, whereas a longitudinal groove is incorporated in the tubular outer wall 2 to form the channel 7.
  • the cylindrical sleeve 4 can be connected to the cylindrical outer wall 2 at its open end by welding, soldering or the like.
  • FIGS. 4 and 5 which show the tappet according to FIG. 1 in an inclined installation position and in different rotational positions, show the effects of the measure according to the invention.
  • the mouth 9 is at the highest point. The consequence of this is that neither the annular outer oil storage space 10 nor the central oil storage space 18 can run empty. Rather, both remain completely filled with oil in this position, even if the engine should be switched off for a long time.
  • the mouth 9 is at the lowest point. The result of this is that, as shown, the annular outer oil reservoir 10 runs partially empty, but that the central oil reservoir 18 remains fully filled with oil.
  • the aim of the invention is achieved not only when the mouth of the oil guide channel on the one hand and the recess provided in the bottom are diametrically opposite one another, but also when their position deviates more or less from a diametral one. Even if the mouth of the oil guide channel on the one hand and the recess provided in the floor on the other are at an angle of 90 ° to one another, an effect is achieved which is considerably better than in the known prior art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP85114036A 1985-01-09 1985-11-05 Hydraulischer Tassenstössel für Verbrennungsmotoren Expired EP0187217B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3500425 1985-01-09
DE19853500425 DE3500425A1 (de) 1985-01-09 1985-01-09 Hydraulischer tassenstoessel fuer verbrennungsmotoren

Publications (2)

Publication Number Publication Date
EP0187217A1 EP0187217A1 (de) 1986-07-16
EP0187217B1 true EP0187217B1 (de) 1987-09-30

Family

ID=6259440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114036A Expired EP0187217B1 (de) 1985-01-09 1985-11-05 Hydraulischer Tassenstössel für Verbrennungsmotoren

Country Status (6)

Country Link
US (1) US4648360A (ja)
EP (1) EP0187217B1 (ja)
JP (1) JPH0637847B2 (ja)
BR (1) BR8600053A (ja)
DE (2) DE3500425A1 (ja)
ES (1) ES291550Y (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19681239B4 (de) * 1996-02-03 2006-08-03 Schaeffler Kg Stößel für den Ventiltrieb einer Brennkraftmaschine

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE3810436A1 (de) * 1988-03-26 1989-10-12 Schaeffler Waelzlager Kg Sich selbsttaetig hydraulisch einstellender ventilstoessel
DE3814700A1 (de) * 1988-04-30 1989-11-09 Schaeffler Waelzlager Kg Hydraulisches spielausgleichselement
DE8902780U1 (ja) * 1989-03-08 1989-04-20 Ina Waelzlager Schaeffler Kg, 8522 Herzogenaurach, De
JP2782088B2 (ja) * 1989-06-02 1998-07-30 日鍛バルブ株式会社 直動型油圧ラッシュアジャスタ
JP2782087B2 (ja) * 1989-06-02 1998-07-30 日鍛バルブ株式会社 直動型油圧ラッシュアジャスタ
JPH03149305A (ja) * 1989-11-06 1991-06-25 Ngk Spark Plug Co Ltd バルブリフタ
DE4030987A1 (de) * 1990-10-01 1992-04-02 Schaeffler Waelzlager Kg Sich selbsttaetig hydraulisch einstellender ventilstoessel
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
IT1251311B (it) * 1991-09-12 1995-05-08 Eaton Engine Lifters Spa Corpo di punteria idraulica ad attacco diretto con serbatoio ridotto per olio
DE4340035B4 (de) * 1992-12-10 2006-02-23 Ina-Schaeffler Kg Mechanischer Tassenstößel
JPH06280513A (ja) * 1993-03-30 1994-10-04 Ngk Insulators Ltd 油圧式タペット
DE4325610A1 (de) * 1993-07-30 1995-02-02 Schaeffler Waelzlager Kg Tassenförmiger Ventilstößel
DE9317325U1 (de) * 1993-11-12 1994-01-05 Schaeffler Waelzlager Kg Stößel für einen Ventiltrieb einer Brennkraftmaschine
DE4343876A1 (de) * 1993-12-22 1995-06-29 Schaeffler Waelzlager Kg Stößel für den Ventiltrieb einer Brennkraftmaschine
US5586528A (en) * 1993-12-22 1996-12-24 Ina Walzlager Schaeffler Kg Tappet for the valve drive of an internal combustion engine
DE19602012A1 (de) * 1996-01-20 1997-07-24 Schaeffler Waelzlager Kg Durch einen Nocken einer Brennkraftmaschine betätigter Ventilstößel
DE19603915A1 (de) * 1996-02-03 1997-08-07 Schaeffler Waelzlager Kg Stößel für einen Ventiltrieb einer Brennkraftmaschine
DE19705726A1 (de) * 1997-02-14 1998-08-20 Schaeffler Waelzlager Ohg Ventiltrieb einer Brennkraftmaschine
DE102005046062A1 (de) * 2005-09-27 2007-03-29 Schaeffler Kg Kraftübertragungsvorrichtung mit hydraulischer Ventilspielausgleichsvorrichtung

Family Cites Families (5)

* 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
US4470381A (en) * 1979-12-05 1984-09-11 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
JPS5934005U (ja) * 1982-08-30 1984-03-02 トヨタ自動車株式会社 内燃機関の油圧リフタ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19681239B4 (de) * 1996-02-03 2006-08-03 Schaeffler Kg Stößel für den Ventiltrieb einer Brennkraftmaschine

Also Published As

Publication number Publication date
ES291550Y (es) 1987-01-16
BR8600053A (pt) 1986-09-23
EP0187217A1 (de) 1986-07-16
JPH0637847B2 (ja) 1994-05-18
JPS61164006A (ja) 1986-07-24
DE3500425A1 (de) 1986-07-10
US4648360A (en) 1987-03-10
DE3560732D1 (en) 1987-11-05
ES291550U (es) 1986-05-01

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