EP0268130B1 - Compensateur de jeu hydraulique - Google Patents

Compensateur de jeu hydraulique Download PDF

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Publication number
EP0268130B1
EP0268130B1 EP87116082A EP87116082A EP0268130B1 EP 0268130 B1 EP0268130 B1 EP 0268130B1 EP 87116082 A EP87116082 A EP 87116082A EP 87116082 A EP87116082 A EP 87116082A EP 0268130 B1 EP0268130 B1 EP 0268130B1
Authority
EP
European Patent Office
Prior art keywords
oil inlet
opening
housing sleeve
compensation element
element 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
EP87116082A
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German (de)
English (en)
Other versions
EP0268130A1 (fr
Inventor
Walter Dipl.-Ing. Speil (Tu)
Dieter Schmidt
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 EP0268130A1 publication Critical patent/EP0268130A1/fr
Application granted granted Critical
Publication of EP0268130B1 publication Critical patent/EP0268130B1/fr
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
    • 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
    • F01L2307/00—Preventing the rotation of tappets

Definitions

  • the invention relates to a hydraulic lash adjuster, in particular valve tappet, for example roller tappet, with a housing in which a pressure piston is guided with an oil supply bore and a pressure chamber is formed behind the pressure piston and which has an oil inlet chamber with an oil inlet opening for supplying oil to the pressure chamber, a base body of the Housing forms the pressure chamber and the guide for the pressure piston and the oil inlet chamber is formed between the base body and a housing sleeve arranged concentrically to the base body.
  • roller tappets are also described in EP-O - 180 872 A2 and in EP-0-190 418 A1.
  • the housings of these are solid.
  • the oil inlet chambers are comparatively small.
  • the oil inlet openings are drilled at an angle. This complicates the oil supply.
  • roller tappet is known from EP-OS 253 073, which was published after the filing date but is part of the state of the art according to Art. 54.3 EPC.
  • anti-rotation locks made of sheet metal are placed on the base body, which cooperate with guide parts arranged in the cylinder head.
  • An oil inlet chamber is not provided, which can lead to problems with the oil supply, and the area of the base body which is reduced in diameter has a low rigidity.
  • the object of the invention is to propose a play compensation element of the type mentioned, the rigidity of which is improved in the case of a lightweight construction and oil losses are avoided.
  • the above object is achieved in the case of a play compensation element of the type mentioned at the outset in that the housing sleeve is placed on the base body and is connected at both ends to it and in that the base body is reduced in its outer diameter in the region of the housing sleeve and an opening corresponding to the oil supply bore arranged in the pressure piston for connecting the pressure chamber to the oil inlet chamber.
  • the housing here is not solid, but consists of the solid body and the comparatively light housing sleeve. This reduces the moving masses. Nevertheless, a high rigidity of the structure is guaranteed. This is because executives do not need to accept the housing sleeve. Oil losses are avoided.
  • the volume of the oil inlet chamber is comparatively large.
  • the oil inlet opening is formed directly on the housing sleeve and need not be drilled obliquely. This ensures that the oil supply to the pressure chamber takes place practically without delay.
  • the oil supply channel provided in the engine block which feeds the oil inlet chamber via the oil inlet opening, does not have to open tangentially to the guide bore for the valve tappet provided in the engine block, but rather can run radially at right angles to the axis of the valve tappet.
  • the oil supply to the oil inlet chamber is guaranteed over the entire stroke of the valve lifter.
  • an oil outlet opening is provided on the circumference of the housing sleeve, in particular by 180 °, with respect to the oil inlet opening. This opens into an oil channel provided in the engine block, which leads to the adjacent valve lifter.
  • the oil inlet chamber of the one valve tappet absorbs oil on one side and passes it on to the adjacent valve tappet on the other side.
  • the housing sleeve has an opening into which a guide body is inserted which projects into the oil inlet chamber and projects beyond the outer circumference of the housing sleeve.
  • the guide bore of the engine block is provided with a corresponding guide slot for the guide body.
  • the outer surface of the housing sleeve forms the guide surface of the valve lifter in the guide bore of the engine block.
  • the basic body of the housing then practically does not have to contribute to guiding the valve tappet.
  • the roller tappet has a base body (1).
  • a bolt (2) is attached to this, on which a roller (4) is mounted via needle rollers (3).
  • a two-part hollow piston (6, 7) is inserted into a recess (5) in the base body (1).
  • a check valve (8) consisting of a valve cap (9), a compression spring (10) and a valve ball (11).
  • the check valve (8) establishes a connection between the interior (12) of the hollow piston (6, 7) and a pressure chamber (13) in the base body (1) behind the piston (6, 7).
  • a compression spring (14) is arranged, which acts on the lower piston part (7) and presses the upper piston part (6) under tension against a retaining cap (15) which is fixed to the base body (1).
  • the upper part (6) has a dome-shaped receptacle (16) for a pressure ball (17) which projects above the holding cap (15).
  • the base body (1) is tapered in the area of the piston (6, 7). In this area, a housing sleeve (18) is placed on the base body (1).
  • the housing sleeve (18) consists of a machined, hardened ring part, which is ground on its outer surface (19). At one end, the housing sleeve (18) is provided with a neck (20) which is welded to the base body (1). With its other end (21), the housing sleeve (18) sits on a step (22) of the base body (1). It can also be welded to the base body (1) there.
  • a circumferential oil inlet chamber (23) exists between the housing sleeve (18) and the base body (1). Their volume is large compared to the volume of the pressure chamber (13).
  • the base body (1) is provided with an opening (24) in the region of the oil inlet chamber (23). This is assigned to an opening (25) of the upper part (6).
  • the openings (24, 25) are designed so that they form a passage between the oil inlet chamber (23) and the interior (12) and thus the pressure chamber (13) in each stroke position of the piston (6, 7).
  • the housing sleeve (18) has an oil inlet opening designed as an elongated hole (26). This is close to level (22).
  • An oil outlet opening (27) (see FIG. 2) is provided on the outer circumference of the housing sleeve (18), offset by 180 ° with respect to the oil inlet opening (26). This is also designed as an elongated hole.
  • the housing sleeve (18) is provided with an opening (28), on the edge of which retaining lugs (29) are stamped.
  • the holding lugs (29) hold a needle roller (30), which serves as a guide body — without a rolling function — in the event of an axial displacement of the roller tappet radially.
  • the holding lugs (29) can also be arranged so that they hold the needle roller (30) axially.
  • the needle roller (30) protrudes into the oil inlet chamber (23), where it can stand on the base body (1). With a part of its circumference, it projects beyond the outer surface (19) of the housing sleeve (18). It sits in the opening (28) almost oil-tight. It is favorable to use a needle roller as the guide body, since such needle rollers are serial parts and their fixing is simple.
  • the needle roller (30) is offset on the circumference of the housing sleeve (18) by 90 ° with respect to the oil inlet opening (26) and the oil outlet opening (27).
  • the roller tappet described is inserted into a guide bore (31) in an engine block (32).
  • the pressure ball (17) rests on a valve train, not shown.
  • an oil supply channel (33) is formed, which is directed radially at right angles to the slot (26).
  • an oil discharge channel (34) is provided in the engine block (32), which is aligned radially at right angles with the oil outlet opening (27).
  • the oil discharge channel (34) leads to the oil inlet opening of an adjacent, identical roller tappet, which is not shown in detail.
  • the elongated holes (26, 27) are designed so that they are open to the channels (33, 34) in each stroke position of the roller tappet.
  • the housing sleeve (18) guided in the guide bore (31) thus forms on the one hand a comparatively large oil inlet chamber (23).
  • the oil inlet chamber (23) forms a permeable connection to the oil inlet chamber of the adjacent roller tappet via the oil discharge channel (34).
  • the housing sleeve (18) provides secure axial guidance of the roller tappet in the guide bore (31), wherein a groove (35) in the guide bore (31) corresponding to the needle roller (30) prevents rotation of the roller tappet.
  • the base body (1) is composed of a piston guide part (36) and a base part (37).
  • the piston guide part can be a comparatively thin-walled series part. It is inserted in the base part (37).
  • the end of the housing sleeve (18) is firmly connected to the base part (37).
  • the piston guide part (36) can be firmly connected to the housing sleeve (18) on the neck (20). However, it can also be loosely guided in the housing sleeve (18) and in the base part (37).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (11)

1. Elément hydraulique de compensation de jeu, et plus particulièrement, des poussoirs de soupape comme par exemple des poussoirs à galets, comprenant un boîtier dans lequel est guidé un piston de pression (6, 7) muni d'un alésage d'amenée d'huile (25), et dans lequel une chambre de pression (13) est formée derrière le piston de pression, lequel boîtier comprend une chambre d'admission d'huile (23) ayant un orifice d'admission d'huile (26) pour l'alimentation en huile de la chambre de pression (13), un corps de base (1) du boîtier formant la chambre de pression (13) ainsi que le guidage pour le piston de pression (6, 7), et la chambre d'admission d'huile (23) étant formée entre le corps de base (1) et au manchon de boîtier agencé concentriquement au corps de base et comprenant l'orifice d'admission d'huile, caractérisé en ce que le manchon de boîtier (18) est rapporté sur le corps de base (1) et relié à ses deux extrémités à celui-ci, et le corps de base (1 ), dans la région du manchon de boîtier (18), a un diamètre extérieur réduit, et comprend une ouverture (24) correspondant à l'alésage d'amenée d'huile (25) du piston de pression (6, 7) afin de relier la chambre de pression (13) à la chambre d'admission d'huile (23).
2. Elément de compensation de jeu selon la revendication 1, caractérisé en ce que sur la périphérie du manchon de boîtier (18), et décalé par rapport à l'orifice d'admission d'huile (26), est prévu un orifice de décharge d'huile (27).
3. Elément de compensation de jeu selon la revendication 2, caractérisé en ce que l'orifice de décharge d'huile (27) sur le manchon de boîtier (18) est décalé de 180° par rapport à l'orifice d'admission d'huile (26).
4. Elément de compensation de jeu selon une des revendications précédentes, caractérisé en ce que l'orifice d'admission d'huile (26) et/ou l'orifice de décharge d'huile (27) sont formés par un trou oblong de sorte qu'en chaque position de la course de l'élément de compensation de jeu, il existe une liaison ouverte à la chambre d'admission d'huile (23).
5. Elément de compensation de jeu selon une des revendications précédentes, caractérisé en ce que le manchon de boîtier (18) comprend un perçage (28) dans lequel est inséré un corps de guidage (30) qui fait saillie dans la chambre d'admission d'huile (23) et s'étend au-delà de la périphérie extérieure (19) du manchon de boîtier (18).
6. Elément de compensation de jeu selon la revendication 5, caractérisé en ce que le corps de guidage (30) est décalé sur la périphérie du manchon de boîtier (18) par rapport à l'orifice d'admission d'huile (26) et par rapport à l'orifice de décharge d'huile (27).
7. Elément de compensation de jeu selon une des revendications précédentes, caractérisé en ce que la surface externe (19) du manchon de boîtier (18) forme la surface de guidage pour le poussoir de soupape dans un alésage de guidage (31).
8. Elément de compensation de jeu selon une des revendications précédentes, caractérisé en ce que le corps de base (1) comprend dans la région de la chambre d'admission d'huile (23), une ouverture (24), et le piston (6, 7) comprend une ouverture (25) qui est ouverte sur l'ouverture (24) du corps de base (1) en chaque position de la course du piston (6, 7).
9. Elément de compensation de jeu selon une des revendications précédentes, caractérisé en ce que le manchon de boîtier (18) comprend un col (20) qui est relié à la région de diamètre réduit du corps de base (1).
10. Elément de compensation de jeu selon une des revendications précédentes, caractérisé en ce qu'une (21) des extrémités du manchon de boîtier (18) est supportée sur un gradin (22) du corps de base (1).
11. Elément de compensation de jeu selon une des revendications précédentes, caractérisé en ce que le corps de base (1) est composé d'une pièce de guidage de piston (36) et une pièce de base (37).
EP87116082A 1986-11-08 1987-11-02 Compensateur de jeu hydraulique Expired - Lifetime EP0268130B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3638202 1986-11-08
DE19863638202 DE3638202A1 (de) 1986-11-08 1986-11-08 Hydraulisches spielausgleichselement

Publications (2)

Publication Number Publication Date
EP0268130A1 EP0268130A1 (fr) 1988-05-25
EP0268130B1 true EP0268130B1 (fr) 1991-01-09

Family

ID=6313532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87116082A Expired - Lifetime EP0268130B1 (fr) 1986-11-08 1987-11-02 Compensateur de jeu hydraulique

Country Status (4)

Country Link
US (1) US4747376A (fr)
EP (1) EP0268130B1 (fr)
DE (2) DE3638202A1 (fr)
ES (1) ES2019360B3 (fr)

Families Citing this family (25)

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Publication number Priority date Publication date Assignee Title
DE3814700A1 (de) * 1988-04-30 1989-11-09 Schaeffler Waelzlager Kg Hydraulisches spielausgleichselement
JPH07652Y2 (ja) * 1988-07-13 1995-01-11 富士バルブ株式会社 油圧式バルブラッシュアジャスタ
JPH072967Y2 (ja) * 1988-09-30 1995-01-30 富士バルブ株式会社 油圧式バルブラッシュアジャスタ
US4846121A (en) * 1988-10-05 1989-07-11 Ford Motor Company Variable friction roller tappets
DE4023885A1 (de) * 1990-07-27 1992-01-30 Bayerische Motoren Werke Ag Rollenstoessel mit hydraulischem ventilspiel-ausgleich
DE4023886A1 (de) * 1990-07-27 1992-01-30 Bayerische Motoren Werke Ag Rollenstoessel mit einem hydraulischen ausgleichselement
US5127584A (en) * 1991-05-06 1992-07-07 General Motors Corporation Fuel injection nozzle
DE4128813A1 (de) * 1991-08-30 1993-03-04 Schaeffler Waelzlager Kg Hydraulischer rollenstoessel
US5673661A (en) * 1995-11-27 1997-10-07 Jesel; Daniel Henry Valve lifter
DE19603915A1 (de) * 1996-02-03 1997-08-07 Schaeffler Waelzlager Kg Stößel für einen Ventiltrieb einer Brennkraftmaschine
DE19603916A1 (de) * 1996-02-03 1997-08-07 Schaeffler Waelzlager Kg Stößel für den Ventiltrieb einer Brennkraftmaschine
DE19748164A1 (de) * 1997-10-31 1999-05-06 Schaeffler Waelzlager Ohg Rollenstößel
JP3700409B2 (ja) * 1998-09-04 2005-09-28 トヨタ自動車株式会社 ３次元カム用バルブリフタおよび可変動弁装置
US6209498B1 (en) * 1998-12-01 2001-04-03 Competition Cams, Inc. Roller valve lifter with oiling channel
DE10030232A1 (de) * 2000-06-20 2002-01-17 Siemens Ag Vorrichtung zum Übertragen einer Bewegung mit Spielausgleich
DE102004036106A1 (de) * 2004-07-24 2006-03-16 Ina-Schaeffler Kg Periodisch beaufschlagbarer Stößel für einen Ventil- oder Pumpentrieb
DE102005042598B4 (de) * 2005-09-07 2008-10-16 Ab Skf Stößel
DE102006045933A1 (de) * 2006-09-28 2008-04-03 Robert Bosch Gmbh Stößelbaugruppe für eine Hochdruckpumpe und Hochdruckpumpe mit wenigstens einer Stößelbaugruppe
JP2010037997A (ja) * 2008-08-01 2010-02-18 Denso Corp 燃料供給ポンプ
KR101289916B1 (ko) * 2008-09-04 2013-07-25 코요 베어링즈 유에스에이, 엘엘씨 태핏과 함께 사용하기 위한 정렬 장치
BR112013014653B1 (pt) 2010-12-13 2021-01-05 Eaton Coporation tucho e método para fabricar um tucho
DE102011002589A1 (de) 2011-01-12 2012-07-12 Schaeffler Technologies Gmbh & Co. Kg Rollennockenfolger
USD701243S1 (en) 2011-12-13 2014-03-18 Eaton Corporation Pump actuator anti-rotation device
EP3173612B1 (fr) * 2015-11-24 2019-09-18 Aktiebolaget SKF Dispositif de galet à contre-came avec obturateur de retenue
DE102017212910A1 (de) * 2017-07-27 2019-01-31 Robert Bosch Gmbh Pumpe, insbesondere Hochdruckpumpe eines Kraftstoffeinspritzsystems

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EP0253073A1 (fr) * 1986-07-02 1988-01-20 Ford-Werke Aktiengesellschaft Procédé pour produire un dispositif de poussoir à galet avec blocage en rotation pour moteur à combustion interne

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DE2758957A1 (de) * 1977-12-30 1979-07-05 Wizemann Gmbh U Co J Hydraulischer tassenstoessel
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US4541373A (en) * 1983-11-04 1985-09-17 Honda Giken Kogyo Kabushiki Kaisha Oil lash adjuster
US4793295A (en) * 1984-11-08 1988-12-27 Stanadyne, Inc. Retainer for a hydraulic lash adjuster
JPS61210206A (ja) * 1985-03-15 1986-09-18 Honda Motor Co Ltd 密封型油圧ラツシユアジヤスタ
JPS61210204A (ja) * 1985-03-15 1986-09-18 Honda Motor Co Ltd 密封型油圧ラツシユアジヤスタ
US4607599A (en) * 1985-05-15 1986-08-26 Eaton Corporation Roller follower hydraulic tappet
US4633827A (en) * 1985-10-07 1987-01-06 Eaton Corporation Hydraulic lash adjuster with combined reservoir extension and metering system
DE3541198A1 (de) * 1985-11-21 1987-05-27 Motomak Hydraulische spielausgleichsvorrichtung

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
EP0253073A1 (fr) * 1986-07-02 1988-01-20 Ford-Werke Aktiengesellschaft Procédé pour produire un dispositif de poussoir à galet avec blocage en rotation pour moteur à combustion interne

Also Published As

Publication number Publication date
EP0268130A1 (fr) 1988-05-25
DE3638202A1 (de) 1988-05-19
US4747376A (en) 1988-05-31
ES2019360B3 (es) 1991-06-16
DE3767285D1 (de) 1991-02-14

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