EP1570160B1 - Actionneur de soupape de transfert de gaz dans un moteur a combustion interne - Google Patents

Actionneur de soupape de transfert de gaz dans un moteur a combustion interne Download PDF

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Publication number
EP1570160B1
EP1570160B1 EP03812118A EP03812118A EP1570160B1 EP 1570160 B1 EP1570160 B1 EP 1570160B1 EP 03812118 A EP03812118 A EP 03812118A EP 03812118 A EP03812118 A EP 03812118A EP 1570160 B1 EP1570160 B1 EP 1570160B1
Authority
EP
European Patent Office
Prior art keywords
valve
valve actuator
wedge pieces
actuator according
threaded pin
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
EP03812118A
Other languages
German (de)
English (en)
Other versions
EP1570160A1 (fr
Inventor
Uwe Hammer
Peter Lang
Stefan Reimer
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1570160A1 publication Critical patent/EP1570160A1/fr
Application granted granted Critical
Publication of EP1570160B1 publication Critical patent/EP1570160B1/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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • 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
    • Y10T74/2142—Pitmans and connecting rods

Definitions

  • the invention relates to a valve actuator for actuating a gas exchange valve of an internal combustion engine, according to the preamble of claim 1.
  • Such a valve actuator is from the DE 10 116 218 A1 in which a shaft end of the gas exchange valve is connected to an actuating piston of the valve actuator by means of at least two shank-shaped wedge pieces enclosing the shaft end, axially supporting on the control piston, whose radially outer circumferential surface is conical and is enclosed by a cone clamping sleeve.
  • the Konusspannhülse has a radially inner peripheral surface which extends complementary to the cone angle of the wedge pieces and is axially clamped against them by a formed on the wedge pieces threaded connection. Due to the formation of cone angle and threaded connection to the wedge pieces these are relatively complex components that are very expensive to manufacture in production.
  • a threaded bolt is provided for connecting the gas exchange valve to the valve actuator, which is axially positively connected and rotatably connected to the wedge pieces.
  • the wedge pieces may extend beyond the shaft end in the axial extension of the valve actuator, where they are connected to the threaded bolt there.
  • the wedge pieces are then tapered conically with increasing distance from the gas exchange valve and clamped on the formed on the threaded bolt thread with the Konusspannhülse.
  • the Konusspannhülse is integrally formed by the actuating piston and the threaded portion with a corresponding threaded portion on a radially inner peripheral surface of the actuating piston is engaged, the number of parts of the valve actuator can be reduced.
  • the threaded bolt can be connected to the wedge pieces via engaging in annular grooves annular beads which are arranged annularly circumferentially on the wedge pieces or on the threaded bolt.
  • FIG. 1 From a valve train of an internal combustion engine is in FIG. 1 a gas exchange valve 1 is shown, which is actuated by an actuating piston 2 of a valve actuator 4 such that it performs in the axial direction up and down opening and closing movements.
  • the gas exchange valve 1 has in known manner a valve stem 5, which extends in the axial direction of the combustion chamber of the internal combustion engine away.
  • the valve stem 5 has a combustion chamber remote shank end 5a, which is surrounded by two half-shell-shaped wedge pieces 6, 7.
  • the shank end 5a has at least one annular groove 8, in which at least one, formed on the inner circumference of the wedge pieces 6, 7 annular bead 9 engages radially.
  • a total of three axially equidistantly angeordete annular grooves 8 on the valve stem 5 and three corresponding annular beads 9 are provided.
  • the annular beads 9 are thereby formed by substantially semicircular Operawülsten to the two wedge pieces 6,7, which complement each other in a circle to the annular beads 9.
  • the wedge pieces 6, 7 form on its outer circumferential surface a cone-shaped portion 10, which tapers with increasing distance from the gas exchange valve 1.
  • the two wedge pieces 6, 7 together form a clamping wedge 11 which cooperates with a corresponding conical inner surface 12 of a cone clamping sleeve 13.
  • the Konusspannhülse 13 is integrally formed at a combustion chamber facing the end 14 of the actuating piston 2 with this.
  • the actuator piston 2 extends in the axial direction along an axis 15 concentric with a longitudinal axis 17 of the valve stem 5 of the gas exchange valve 1.
  • the valve actuator 4 has a regulator housing 20, which is penetrated axially by the actuating piston 2.
  • a guide sleeve 18 within which the actuating piston 2 is guided axially displaceably via a guide collar 23 on the actuating piston 2.
  • a first chamber 22 is formed on the combustion chamber side facing the guide collar 23, which is connected by a first opening 21 in the wall of the actuator housing 20 with a first pressure medium line not shown.
  • the first chamber 22 is thereby limited by the actuator housing 20, the guide sleeve 18 and the actuating piston 2 including the guide collar 23.
  • a first sealing ring 26 prevents that in the first chamber 22 befindliches pressure medium, such as hydraulic fluid, via a first annular gap 24 exits the actuator housing 20.
  • a second chamber 25 is formed on the combustion chamber facing away from the side of the guide collar 23, which is connected by a second opening 27 in the wall of the actuator housing 20 with a likewise not shown second pressure medium line.
  • the second chamber 25 is also limited by the actuator housing 20, the guide sleeve 18 and the actuating piston 2 including the guide collar 23.
  • a second sealing ring 28 prevents pressure medium located in the second chamber 25 from exiting the actuator housing 20 via a second annular gap 29.
  • the actuating piston 2 is formed as a hollow cylinder. There is a constriction 38 on the inner periphery of the actuating piston 2 between the conical sleeve 13 close to the combustion chamber and a combustion chamber distal end 2a of the actuating piston 2. In the region of the constriction 38, an internal thread 39 is formed, which engages with a corresponding external thread 40 on a threaded bolt 41.
  • the threaded bolt 41 is arranged concentrically within the actuating piston 2.
  • the external thread 40 extends axially through a threaded portion 31 on the threaded bolt 41 and is at least partially in engagement with the external thread 40.
  • the threaded bolt 41 is axially positively connected, rotatably connected in the circumferential direction with the valve stem 5.
  • the Konusspannhülse 13 and the wedge pieces 6, 7 are extended axially beyond the shank end 5a of the valve stem 5, wherein they surround a combustion chamber near the end 41a of the threaded bolt 41.
  • at least one radial projection 42 is provided on the inner circumference of the clamping wedge 11, which in the example is designed as an annular circumferential bead which engages radially in at least one recess 43 on the outer circumference of the threaded bolt 41.
  • the recess 43 is formed in the example as an annular circumferential groove and there are a total of three axially equidistantly angeordete beads 42 on the clamping wedge 11 and three corresponding grooves 43 on the threaded bolt 41, in which the beads 42 engage radially.
  • a combustion chamber remote end 41b of the threaded bolt 41 is formed as an external hexagon 45 for attaching a screwing tool, not shown.
  • the threaded bolt 41 can be screwed into the internal thread 39, wherein due to the positive connection with the clamping wedge 11 of the clamping wedge 11 with the cone clamping sleeve 13 is braced axially and radially.
  • the adjusting piston 2 does not rotate during insertion of the threaded bolt 41 due to frictional engagement, a second, also hexagonal trained tool for holding in a tool holder 46 can be recognized at the shaft end 2a.
  • FIG. 3 shows that the two wedge pieces 6, 7 bear radially in the form of a half shell on the cone clamping sleeve.
  • the gas exchange valve 1 is inserted into the valve stem guide of the cylinder head (not shown) and then the wedge pieces 6, 7 placed on the shaft end 5a. In this case also the end 41a of the threaded bolt 41 between the wedge pieces 6, 7 is fixed. Subsequently, the valve actuator 4 is placed from above on the preassembled components gas exchange valve 1, threaded bolt 41 and wedge pieces 6, 7, until the outer surface of the clamping wedge 11 rests against the inner cone surface 11. Then a screwing in the control piston 2 is guided to the hexagon socket 45 and the threaded bolt 41 axially adjusted by turning over the thread 37, 39. In this way, the clamping wedge 11 and the cone clamping sleeve 13 are clamped together. Possibly. the actuator piston 2 must be fixed in the direction of rotation via another tool.
  • the applicability of the present invention is not limited to the above-described embodiment.
  • numerous change possibilities are conceivable in the concrete embodiment, which do not significantly change the meaning of the invention.
  • the adjusting piston 2 could be accommodated more or less completely in the actuator housing 20.
  • the number of grooves 9, 43 and beads 8, 42 can be varied.
  • the grooves or beads may each be formed on the other component, without changing the operation of the valve actuator.
  • the Starting points for lathe tools can be performed deviating from the described embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Lift Valve (AREA)

Claims (8)

  1. Actionneur de soupape pour commander une soupape d'échange de gaz d'un moteur à combustion interne comprenant un piston d'actionneur (2) en forme de manchon relié à la tige de soupape (5), au moins deux pièces en forme de coin et de coquille (6, 7) entourant une extrémité (5a) de la tige de soupape (5) et dont la surface périphérique, radiale, extérieure comporte un segment (10) en forme d'enveloppe conique se rétrécissant à mesure que l'on s'éloigne de la soupape d'échange de gaz (1), ce segment, entouré au moins en partie par un manchon de serrage de cône (13) et ayant une surface intérieure conique (12) correspondante, est relié au piston d'actionneur (2),
    caractérisé en ce que
    les pièces en forme de coin (6, 7) sont reliées axialement en rotation par une liaison par la forme, à un goujon fileté (41),
    le goujon fileté (41) ayant au moins un segment fileté (31) permettant de serrer axialement les pièces en forme de coins (6, 7) et le manchon de serrage de cône (13).
  2. Actionneur de soupape selon la revendication 1,
    caractérisé en ce que
    les pièces en forme de coin (6, 7) s'étendent dans le prolongement axial de la tige de soupape (5) au-delà de l'extrémité (5a) de la tige en y entourant le goujon fileté (41), au moins en partie axialement, par une liaison par la forme.
  3. Actionneur de soupape selon la revendication 1 ou 2,
    caractérisé en ce que
    le manchon de serrage de cône (13) est formé par le piston d'actionneur (2) et le segment fileté (31) est en prise, au moins en partie, avec un filetage correspondant (39) du piston d'actionneur (2).
  4. Actionneur de soupape selon la revendication 3,
    caractérisé en ce que
    le segment fileté (31) s'étend dans la direction axiale sur la périphérie extérieure du goujon fileté (41).
  5. Actionneur de soupape selon la revendication 4,
    caractérisé en ce que
    la périphérie extérieure du goujon fileté (41) comporte au moins une partie en saillie radiale (42) pénétrant radialement dans au moins une cavité radiale (43) d'une surface intérieure de la pièce en forme de coin (6,7).
  6. Actionneur de soupape selon la revendication 5,
    caractérisé en ce qu'
    au moins une cavité radiale (43) ou au moins une partie en saillie radiale (42) s'étend en périphérie suivant une forme annulaire.
  7. Actionneur de soupape selon la revendication 6,
    caractérisé en ce qu'
    au moins une cavité (43) du goujon fileté (41) se trouve dans la région de son extrémité (41a) tournée vers la tige de soupape (5), et
    le segment fileté (31) se situe dans la direction axiale de la soupape d'échange de gaz (1), derrière l'extrémité de tige (5a).
  8. Actionneur de soupape selon la revendication 7,
    caractérisé en ce que
    le goujon fileté (41) comporte en tout trois cavités périphériques (43) dans lesquelles pénètrent respectivement trois parties en saillie (42) correspondantes, des pièces en forme de coin (6, 7).
EP03812118A 2002-12-02 2003-06-04 Actionneur de soupape de transfert de gaz dans un moteur a combustion interne Expired - Lifetime EP1570160B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10256242A DE10256242A1 (de) 2002-12-02 2002-12-02 Ventilsteller zur Betätigung eines Gaswechselventils einer Brennkraftmaschine
DE10256242 2002-12-02
PCT/DE2003/001853 WO2004051058A1 (fr) 2002-12-02 2003-06-04 Actionneur de soupape de transfert de gaz dans un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1570160A1 EP1570160A1 (fr) 2005-09-07
EP1570160B1 true EP1570160B1 (fr) 2008-11-05

Family

ID=32308918

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03812118A Expired - Lifetime EP1570160B1 (fr) 2002-12-02 2003-06-04 Actionneur de soupape de transfert de gaz dans un moteur a combustion interne

Country Status (5)

Country Link
US (1) US7360517B2 (fr)
EP (1) EP1570160B1 (fr)
JP (1) JP4221376B2 (fr)
DE (2) DE10256242A1 (fr)
WO (1) WO2004051058A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT501335B1 (de) * 2005-01-19 2007-05-15 Avl List Gmbh Ventilbetätigungseinrichtung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1489160A (fr) 1966-06-07 1967-07-21 Dispositif de fixation d'un porte-outil en bord de broche
JP2664986B2 (ja) 1989-04-03 1997-10-22 三菱重工業株式会社 内燃機関の動弁装置
DE4117406A1 (de) * 1991-05-28 1992-12-03 Freudenberg Carl Fa Ventiltrieb im zylinderkopf einer verbrennungskraftmaschine
JP3331526B2 (ja) * 1993-11-25 2002-10-07 フジオーゼックス株式会社 ポペット弁の駆動装置
FR2776950B1 (fr) 1998-04-06 2000-05-19 Belin Yvon Sa Outil de coupe rotatif a tete interchangeable assemblee par traction
DE10116218A1 (de) 2001-03-30 2002-10-10 Bosch Gmbh Robert Verbindung zwischen einem Schaftende eines Gaswechselventils einer Brennkraftmaschine und einem hülsenförmigen Stellkolben eines Ventilstellers
DE10228702A1 (de) 2001-10-19 2003-04-30 Bosch Gmbh Robert Hydraulischer Aktor für ein Gaswechselventil
DE10321157A1 (de) * 2003-05-12 2004-12-02 Robert Bosch Gmbh Ventilsteller zur Betätigung eines Gaswechselventils einer Brennkraftmaschine

Also Published As

Publication number Publication date
DE50310760D1 (de) 2008-12-18
US20060137639A1 (en) 2006-06-29
JP2006508291A (ja) 2006-03-09
US7360517B2 (en) 2008-04-22
JP4221376B2 (ja) 2009-02-12
WO2004051058A1 (fr) 2004-06-17
DE10256242A1 (de) 2004-06-09
EP1570160A1 (fr) 2005-09-07

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