EP1234957B1 - Commande de soupape pour moteur à combustion interne - Google Patents

Commande de soupape pour moteur à combustion interne Download PDF

Info

Publication number
EP1234957B1
EP1234957B1 EP02002529A EP02002529A EP1234957B1 EP 1234957 B1 EP1234957 B1 EP 1234957B1 EP 02002529 A EP02002529 A EP 02002529A EP 02002529 A EP02002529 A EP 02002529A EP 1234957 B1 EP1234957 B1 EP 1234957B1
Authority
EP
European Patent Office
Prior art keywords
valve
cam
holding member
compensating device
valve drive
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
EP02002529A
Other languages
German (de)
English (en)
Other versions
EP1234957A3 (fr
EP1234957A2 (fr
Inventor
Stephan Laiminger
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.)
Innio Jenbacher GmbH and Co OG
Original Assignee
GE Jenbacher GmbH and Co 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 GE Jenbacher GmbH and Co OHG filed Critical GE Jenbacher GmbH and Co OHG
Priority to AT02002529T priority Critical patent/ATE263309T1/de
Publication of EP1234957A2 publication Critical patent/EP1234957A2/fr
Publication of EP1234957A3 publication Critical patent/EP1234957A3/fr
Application granted granted Critical
Publication of EP1234957B1 publication Critical patent/EP1234957B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34446—Fluid accumulators for the feeding circuit

Definitions

  • the invention relates to a valve train for an internal combustion engine, comprising a driven cam element and a valve which can be opened from the cam region of the rotating cam element against a closing spring and which has a hydraulic lash adjuster with a check valve and a discharge for a pressure transfer medium, the discharge line closed by means of a spring-loaded locking element over the cam portion of the cam member and open over the base circle area.
  • Mechanical valve trains with hydraulic lash adjusters are known in large numbers and in various designs. They serve to adjust the valve in the valve seat, so that it is actually properly closed over the base circle region of the cam element.
  • the adjustment results from the height of the pressure transmission medium, in particular oil, in the pressure chamber, which can be adjusted by changing the inflow.
  • the derivative has an increased flow resistance, for example due to a small cross-section, a throttle element od.
  • a valve clearance compensation has the disadvantage that the medium exits from the pressure chamber during the opening of the valve, ie during the application of the cam portion of the cam member via the derivative.
  • a displaceable inner sleeve is arranged, and in the intermediate space between the cup and the inner sleeve engages an adjustable in the cylinder head intermediate sleeve, wherein passage openings are opened or closed in the sleeves depending on the position of the cam member.
  • passage openings are only released again at the transition to the base circle area, so that the valve clearance is established.
  • the invention has now taken on the task of simplifying the circuit of the blocking element, and proposes for this purpose that the base circle portion of the cam member is provided with a free space into which the blocking element or a holding member associated therewith can enter.
  • the free space of the cam element opens and the locking element can be moved under the action of a spring, so that the derivative of the pressure transmitting element is released.
  • the blocking element can be arranged in the pressure chamber of the hydraulic storage compensation device, wherein it is displaceable in the valve axis and can engage with a second end directly into the free space of the cam element.
  • the blocking element is arranged laterally next to the clearance compensation device on the holding part, wherein the holding part is associated with a compression spring which presses the holding part in the recess of the cam element.
  • the holding part of the blocking element is slidably disposed on the play compensation device, and provided the Durckfeder between the lash adjuster and the holding part.
  • the holding part the clearance compensation device on both sides axially projecting and has limit stops for the displacement of the lash adjuster.
  • the force of the compression spring is preferably substantially less than that of the valve closing spring.
  • the check valve and a throttle element are preferably arranged in series in the discharge line.
  • a valve drive for an intake or exhaust valve 13 of an internal combustion engine has a driven camshaft, on which at least one cam element 1 is arranged, which opens the valve 13 against a valve spring 14.
  • the cam element 1 has a cam area and a base circle area, in which a recessed space 2 is provided which is recessed with respect to the base circle 3.
  • a hydraulic lash adjuster is provided which engages a piston 10 acting on the plunger of the valve 13, a cup-like actuating cylinder 18 in which the piston 10 slidably engages, and a pressure space 14 between the piston 10 and the bottom the adjusting cylinder 18 includes.
  • the pressure chamber 14 can be filled via a supply line 17 and a check valve 16 with a pressure transmission medium, in particular oil, and emptied via a discharge line 6, in which a check valve 9 and a throttle element 7 are arranged one behind the other.
  • a holding part 19 is slidably disposed, which protrudes axially on both sides via the actuating cylinder 18 and in the displacement of the actuating cylinder 18 projecting limit stops 5, 11.
  • the holding part 19 is further provided with a bottom, on which the cam element 1 rests.
  • a compression spring 4 is provided, which presses the holding part 19 against the cam member 1.
  • a blocking element 8 is connected to the holding part 19, so that upon a displacement of the holding part 19, the blocking element 8 is moved, and the check valve 9 opens or closes.
  • valve drive The function of the valve drive is now as follows: At the beginning of the opening phase of the valve 13, the cam member 1, the position shown in Fig. 1, in which the lying on the contour of the base circle 3 between the free space 2 and the cam portion peripheral portion on the holding part 19th rests.
  • the cam member 1 rotates in the direction of the arrow in the position shown in Fig. 2, the holding part 19 is displaced downwards.
  • the actuating cylinder 18 abuts the stop 5 of the holding part, and is moved along.
  • the check valve 16 blocks the supply line 17, and the blocking element 8 blocks the discharge line 6, so that the enclosed in the pressure chamber 14 pressure transmission medium can not escape.
  • the application of the cam element 1 is thus transmitted directly to the piston 10, which bears against the valve tappet.
  • valve 13 lifts off the valve seat 12 and opens the inlet or outlet area.
  • the relative remain Positions of all parts to each other unchanged, so that the valve 13 is moved back by the valve spring 15 back into the valve seat 12.
  • the derivative 6 remains locked, and the volume of the pressure chamber 14 unchanged. Since the actuating cylinder 18 abuts on the stop 5, the holding part 19 follows the receding contour of the cam area until the base circle 3 is reached.
  • the compression spring 4 takes over the further displacement of the holding part 19, and the blocking element 8 is - pulled out of the check valve 9 - at least schematically - so that the discharge line 6 is opened. Excess pressure-transmitting medium can flow out of the pressure chamber 14, braked by the throttle element 7. A lower stop 15 of the retaining element 19 limits the action of the compression spring 4, i. it can be the adjusting cylinder 18 is moved only to rest against the stop 11, whereby an excessive reduction of the pressure chamber volume is prevented despite the open check valve 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Claims (4)

  1. Commande de soupape pour un moteur à combustion interne, avec un élément à came entraîné (1) et avec une soupape (13) d'une zone de came de l'élément à came pivotant, pouvant s'ouvrir vers un ressort récupérateur (15), soupape présentant un dispositif hydraulique de rattrapage de jeu avec une conduite d'alimentation (17) dotée d'un clapet anti-retour (16) et d'une conduite d'évacuation (6) pour un liquide de transmission de pression, moyennant quoi la conduite d'évacuation (6) s'ouvre à l'aide d'un élément de blocage à ressort (8) au-dessus de la zone de la came de l'élément à came (1) et s'ouvre au-dessus de la zone du cercle de base, caractérisée en ce que la zone du cercle de base de l'élément à came (1) est dotée d'un espace vide (2), dans laquelle une pièce d'arrêt (19) de l'élément de blocage peut pénétrer, et en ce que la pièce d'arrêt (19) de l'élément de blocage (8) est disposée de façon à être déplacée sur le dispositif de rattrapage de jeu, moyennant quoi un ressort de compression (4) est prévu entre le dispositif de rattrapage de jeu et la pièce d'arrêt (19).
  2. Commande de soupape selon la revendication 1, caractérisée en ce que la pièce d'arrêt (19) dépasse dans le sens axial le dispositif de rattrapage de jeu dans les deux sens, et présente des butées de limitation (5, 11) pour le trajet de déplacement du dispositif de rattrapage de jeu.
  3. Commande de soupape selon la revendication 1 ou 2, caractérisée en ce que l'élément de blocage (8) est disposé latéralement à côté du dispositif de rattrapage de jeu sur la pièce d'arrêt (19), moyennant quoi le ressort de compression (4) est adjoint à la pièce d'arrêt (19).
  4. Commande de soupape selon l'une quelconque des revendications 1 à 3, caractérisée en ce que l'élément de blocage (8) et un élément de réglage (7) sont disposés en série dans la conduite d'évacuation (6).
EP02002529A 2001-02-21 2002-02-04 Commande de soupape pour moteur à combustion interne Expired - Lifetime EP1234957B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT02002529T ATE263309T1 (de) 2001-02-21 2002-02-04 Ventiltrieb für eine brennkraftmaschine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2682001 2001-02-21
AT2682001 2001-02-21

Publications (3)

Publication Number Publication Date
EP1234957A2 EP1234957A2 (fr) 2002-08-28
EP1234957A3 EP1234957A3 (fr) 2003-01-08
EP1234957B1 true EP1234957B1 (fr) 2004-03-31

Family

ID=3670472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02002529A Expired - Lifetime EP1234957B1 (fr) 2001-02-21 2002-02-04 Commande de soupape pour moteur à combustion interne

Country Status (4)

Country Link
EP (1) EP1234957B1 (fr)
AT (1) ATE263309T1 (fr)
DE (1) DE50200316D1 (fr)
ES (1) ES2217209T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004048072A1 (de) * 2004-10-02 2006-04-13 Ina-Schaeffler Kg Variabler Ventiltrieb einer Brennkraftmaschine
FI124120B (fi) * 2008-07-31 2014-03-31 Wärtsilä Finland Oy Ohjausjärjestely mäntämoottorissa

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1018880B (de) * 1955-05-31 1957-11-07 Albert Pomutz Hydraulische Steuerung, insbesondere fuer die Ventile von Kolbenmaschinen
FR2464372A1 (fr) * 1979-08-30 1981-03-06 Semt Procede et dispositif pour ameliorer le rendement d'un moteur a combustion interne par variation selective au taux de compression effectif selon le regime du moteur
DE4111610C2 (de) * 1990-07-27 1998-07-30 Audi Ag Vorrichtung zur Veränderung der Steuerzeiten eines Gaswechselventils
JPH04301108A (ja) * 1991-03-28 1992-10-23 Aisin Seiki Co Ltd バルブ停止装置付油圧リフタ
DE4124184A1 (de) 1991-07-20 1993-01-21 Schaeffler Waelzlager Kg Hydraulischer tassenstoessel
DE19653459A1 (de) * 1996-12-20 1998-06-25 Schaeffler Waelzlager Ohg Stößel für einen Ventiltrieb einer Brennkraftmaschine

Also Published As

Publication number Publication date
ATE263309T1 (de) 2004-04-15
ES2217209T3 (es) 2004-11-01
DE50200316D1 (de) 2004-05-06
EP1234957A3 (fr) 2003-01-08
EP1234957A2 (fr) 2002-08-28

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