EP0443146B1 - Poussoir avec compensateur hydraulique de jeu aux soupapes - Google Patents

Poussoir avec compensateur hydraulique de jeu aux soupapes Download PDF

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Publication number
EP0443146B1
EP0443146B1 EP90124325A EP90124325A EP0443146B1 EP 0443146 B1 EP0443146 B1 EP 0443146B1 EP 90124325 A EP90124325 A EP 90124325A EP 90124325 A EP90124325 A EP 90124325A EP 0443146 B1 EP0443146 B1 EP 0443146B1
Authority
EP
European Patent Office
Prior art keywords
tappet
skirt
oil supply
supply channel
oil
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
EP90124325A
Other languages
German (de)
English (en)
Other versions
EP0443146A1 (fr
Inventor
Bernhard Gaigl
Bernd Müller
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0443146A1 publication Critical patent/EP0443146A1/fr
Application granted granted Critical
Publication of EP0443146B1 publication Critical patent/EP0443146B1/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
    • F01L1/25—Hydraulic tappets between cam and valve stem

Definitions

  • the invention relates to a bucket tappet with a hydraulic valve lash compensation element, an oil reservoir and an oil supply channel which is delimited by an inner support and which interacts with an overflow hole in the tappet shirt and runs at least in regions essentially parallel to the tappet base, the inner support guiding the compensation element.
  • a tappet is known from the generic EP-B-0 187 217.
  • the invention has set itself the task of demonstrating an improved cup tappet with regard to its functionality.
  • the oil supply channel and the transition bore are substantially diametrically opposite and are connected to one another via a circumferential ring channel formed by the inner support and plunger shirt and / or plunger base. This arrangement prevents the oil reservoir from running empty even when the tappet is at an extreme incline, since the oil column would always have to be raised to a geodetically higher level than the oil reservoir.
  • a bucket tappet according to the invention advantageously differs from a valve tappet according to EP-AO 179 323.
  • the inner support is designed as a relatively weak separate part.
  • the cup tappet designed according to the invention is considerably more stable and easier to manufacture.
  • Inner support and ram shirt can be manufactured using an aluminum die-casting process. This significantly reduces the weight of the bucket tappet and the mass forces that occur.
  • the aluminum alloy can be both AlSi9Cu3, AlSi12CuNi, and AlSi17Cu4Mg.
  • guide surfaces can be untreated, coated or etched for the compensating element, for example.
  • Claim 3 describes how a ram shirt, in particular made of a light metal alloy, can be connected to a ram bottom made of another suitable material, for example a sintered or steel plate.
  • friction welding laser or electron beam welding, caulking or rolling
  • other methods can of course also be selected. The invention is explained in more detail below on the basis of a preferred exemplary embodiment.
  • a cup tappet according to the invention is shown in section.
  • a tappet has a tappet housing 1, within which a hydraulic valve lash compensation element 2 and an inner support 3 are provided.
  • the valve lash compensation element 2, which establishes the connection to a valve, not shown, of an internal combustion engine corresponds in function and structure of the known prior art.
  • the approximately cup-shaped inner support 3 rests with its circular-cylindrical inner wall 4 on the valve lash compensation element 2.
  • the plunger housing 1 consists of a plunger shirt 6 and a plunger base 7. The latter, together with a recess in the valve compensating element 2, delimits an oil reservoir 8 for supplying the compensating element 2 with the amount of oil required for its proper functioning.
  • the oil storage chamber 8 is connected to an oil supply channel 10 via a transfer opening 9.
  • the region of the oil supply channel 10, which runs essentially parallel to the tappet base 7, is formed by the correspondingly shaped inner support 3 in cooperation with the tappet base 7 6 connected. Lubricating oil of the internal combustion engine reaches the tappet housing 1 in a known manner via this transition bore 12.
  • the overflow bore 12 and the oil supply channel 10 are essentially diametrically opposed within the tappet housing 1, it is ensured even with extreme inclined positions of the bucket tappet due to the installation conditions that the oil storage space 8 cannot run empty even during longer downtimes. Regardless of the current position of the bucket tappet, which can be freely rotated in a tappet guide, the amount of oil located in the oil reservoir 8 would always have to be pumped up geodetically in order to ultimately be able to exit the transfer bore 12. To achieve this locking effect, only the transition bore 12 and the oil supply channel 10 have to be diametrically opposed, the position of the transfer opening 9 or the riser 13, however, has no influence on this.
  • the inner support 3 bears against the inside of the tappet base 7.
  • the area of the oil supply channel 10 is essentially excluded from this. Since the inner support 3, which bears against the tappet base 7, extends almost as far as the valve lash compensation element 2, the oil volume upstream of the oil reservoir 8 is kept extremely low. On the one hand, this measure reduces the weight of the bucket tappet and, on the other hand, ensures that the required oil pressure is quickly provided within the oil storage space 8 after the internal combustion engine has started.
  • the inner carrier 3 and the plunger shirt 6 are designed as a one-piece aluminum die-cast part.
  • This embodiment is characterized not only by cost-effective production, but also by considerable weight savings.
  • the number of individual components is reduced and, due to the arrangement of the oil supply channel 10 and the transfer bore 12 according to the invention, rapid filling of the hydraulic compensation element is ensured.
  • Modifications from the exemplary embodiment shown are possible in a simple manner.
  • both the ring channel 11 and the oil supply channel 10 can be machined out of the tappet housing 1.
  • the inner carrier 3 could have complete rotational symmetry.

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

Claims (3)

  1. Poussoir avec compensateur hydraulique du jeu à la soupape (2) comprenant une chambre d'alimentation (8) et son canal d'amenée d'huile (10) qui est en partie sensiblement parallèle au fond du poussoir (7) et délimité par un support interne (3) assurant le guidage de l'élément compensateur, un canal montant (13), délimité par le support interne (3) et par la jupe (6) du poussoir, reliant le canal d'amenée (10) à un trou de passage percé dans la jupe (6), poussoir caractérisé en ce que le canal d'amenée (10) et le trou de passage (12) sont sensiblement diamétralement opposés et reliés par l'intermédiaire d'un canal annulaire (11) délimité par le support interne (3), la jupe (6) et/ou le fond de poussoir (7), le support interne (3) et la jupe (6) constituant une seule pièce appliquée contre le fond de poussoir (7) fixé à la jupe (6).
  2. Poussoir selon la revendication 1, caractérisé en ce que la jupe (6) et le support interne (3) sont réalisés en alliage d'aluminium.
  3. Poussoir selon la revendication 1 ou 2, caractérisé en ce que le fond du poussoir (7) est réuni à la jupe du poussoir (6), par soudage par friction, par laser ou par faisceau d'électrons, ou serti dans cette jupe à plat ou par roulage.
EP90124325A 1990-02-20 1990-12-15 Poussoir avec compensateur hydraulique de jeu aux soupapes Expired - Lifetime EP0443146B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4005261A DE4005261A1 (de) 1990-02-20 1990-02-20 Tassenstoessel mit einem hydraulischen ventilspiel-ausgleichselement
DE4005261 1990-02-20

Publications (2)

Publication Number Publication Date
EP0443146A1 EP0443146A1 (fr) 1991-08-28
EP0443146B1 true EP0443146B1 (fr) 1993-11-18

Family

ID=6400545

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90124325A Expired - Lifetime EP0443146B1 (fr) 1990-02-20 1990-12-15 Poussoir avec compensateur hydraulique de jeu aux soupapes

Country Status (2)

Country Link
EP (1) EP0443146B1 (fr)
DE (2) DE4005261A1 (fr)

Cited By (2)

* 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
DE102005046061A1 (de) * 2005-09-27 2007-03-29 Schaeffler Kg Hebel einer schaltbaren Schlepphebelvorrichtung und Verfahren zur Herstellung desselben

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5119774A (en) * 1990-11-08 1992-06-09 General Motors Corporation Direct acting hydraulic valve lifter
DE4340035B4 (de) * 1992-12-10 2006-02-23 Ina-Schaeffler Kg Mechanischer Tassenstößel
US5320074A (en) * 1993-06-17 1994-06-14 Sealed Power Technologies Limited Partnership Direct acting hydraulic tappet
DE4325610A1 (de) * 1993-07-30 1995-02-02 Schaeffler Waelzlager Kg Tassenförmiger Ventilstößel
DE4428309A1 (de) * 1993-08-24 1995-03-02 Schaeffler Waelzlager Kg Tassenförmiger Ventilstößel
DE9317325U1 (de) * 1993-11-12 1994-01-05 INA Wälzlager Schaeffler KG, 91074 Herzogenaurach Stößel für einen Ventiltrieb einer Brennkraftmaschine
DE4343876A1 (de) * 1993-12-22 1995-06-29 Schaeffler Waelzlager Kg Stößel für den Ventiltrieb einer Brennkraftmaschine
DE4437887A1 (de) * 1994-10-22 1996-04-25 Schaeffler Waelzlager Kg Ventilstößel zur Betätigung von zumindest zwei Gaswechselventilen
DE19602012A1 (de) * 1996-01-20 1997-07-24 Schaeffler Waelzlager Kg Durch einen Nocken einer Brennkraftmaschine betätigter Ventilstößel
DE19724563A1 (de) * 1997-06-11 1998-12-17 Schaeffler Waelzlager Ohg Tassenförmiger Ventilstößel
DE10122373B4 (de) * 2001-05-09 2014-09-18 Schaeffler Technologies Gmbh & Co. Kg Schaltbares Abstützelement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE8808711U1 (de) * 1988-03-26 1988-08-25 INA Wälzlager Schaeffler KG, 8522 Herzogenaurach Sich selbsttätig hydraulisch einstellender Ventilstößel
DE8902780U1 (de) * 1989-03-08 1989-04-20 INA Wälzlager Schaeffler KG, 8522 Herzogenaurach Sich selbsttätig hydraulisch einstellender Ventilstößel
IT1230012B (it) * 1989-04-20 1991-09-20 Eaton Automotive Spa Punteria idraulica con condotto di aspirazione dell'olio, dal serbatoio esterno al serbatoio interno senza inclusioni di bolle d'aria, realizzato mediante lavorazione meccanica.

Cited By (2)

* 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
DE102005046061A1 (de) * 2005-09-27 2007-03-29 Schaeffler Kg Hebel einer schaltbaren Schlepphebelvorrichtung und Verfahren zur Herstellung desselben

Also Published As

Publication number Publication date
DE4005261A1 (de) 1991-08-22
DE59003551D1 (de) 1993-12-23
EP0443146A1 (fr) 1991-08-28

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