EP1234957A2 - Commande de soupape pour moteur à combustion interne - Google Patents

Commande de soupape pour moteur à combustion interne Download PDF

Info

Publication number
EP1234957A2
EP1234957A2 EP02002529A EP02002529A EP1234957A2 EP 1234957 A2 EP1234957 A2 EP 1234957A2 EP 02002529 A EP02002529 A EP 02002529A EP 02002529 A EP02002529 A EP 02002529A EP 1234957 A2 EP1234957 A2 EP 1234957A2
Authority
EP
European Patent Office
Prior art keywords
valve
holding part
cam
compensation device
play compensation
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.)
Granted
Application number
EP02002529A
Other languages
German (de)
English (en)
Other versions
EP1234957A3 (fr
EP1234957B1 (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
Jenbacher 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 Jenbacher AG filed Critical Jenbacher AG
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

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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
    • 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, with a driven Cam element and with one of the cam area of the rotating Cam element against a closing spring openable valve, which is a hydraulic Backlash compensation device with a supply line provided with a check valve and a derivative for a pressure transmission medium, the derivative by means of a spring-loaded locking element over the cam area of the Cam element is closed and open over the base circle area.
  • Mechanical valve trains with hydraulic lash adjusters are in large number and known in different versions. They serve the valve to adjust in the valve seat so that it over the base circle area of the cam element is actually closed properly.
  • the adjustment results from the level of the pressure transmission medium, in particular oil, in the pressure chamber caused by Change in the inflow can be set.
  • the derivative shows an increased Flow resistance, for example due to a small cross section, a throttle element or the like, in order to avoid rapid drainage. Because such Valve clearance compensation has the disadvantage that the medium from the pressure chamber too during the opening of the valve, i.e. during the application by the The cam area of the cam element exits via the derivative was described in DE 41 24 184 A proposed a valve train of the type mentioned, the tappet includes.
  • a sliding inner sleeve is arranged in the cup, and in the space between the cup and the inner sleeve engages in the cylinder head an adjustable intermediate sleeve, with passage openings in the sleeves are opened or closed depending on the position of the cam element. On this is the exit of the pressure transmission medium during the valve opening prevented, and the game compensation element can not be compressed. The Through openings are only cleared again at the transition to the base circle area, so that the valve clearance is established.
  • the invention has now set itself the task of switching the locking element to simplify, and suggests that the base circle area of the cam member is provided with a space into which the locking element or one assigned to it Holding part can occur.
  • the free space opens from the transition from the cam area to the base circle area of the cam element and the locking element can under the action of a spring be moved so that the derivation of the pressure transmission element is released becomes.
  • the locking element can be in the pressure chamber of the hydraulic accumulator compensation device be arranged, it being displaceable in the valve axis lie and with a second end directly in the free space of the cam element can intervene.
  • the blocking element is preferably laterally next to the Match compensation device arranged on the holding part, wherein the holding part Compression spring is assigned, which holds the holding part in the recess of the cam element suppressed.
  • the holding part of the locking element is preferably displaceable on the play compensation device arranged, and the pressure spring between the game compensation device and the holding part provided.
  • the holding part the game compensation device protrudes axially on both sides and limit stops for the displacement the game compensation device.
  • the force of the compression spring is preferably essential less than that of the valve closing spring.
  • a valve train for an intake or exhaust valve 13 of an internal combustion engine has one driven camshaft on which at least one cam element 1 is arranged, that opens the valve 13 against a valve spring 14.
  • the cam element 1 has one Cam area and a base circle area in which one with respect to the Base circle 3 deepened space 2 is provided.
  • a hydraulic lash adjuster provided between the cam element 1 and the valve 13 a piston 10 acting on the tappet of the valve 13, a cup-like Actuating cylinder 18, in which the piston 10 slidably engages, and a pressure chamber 14 between the piston 10 and the bottom of the actuating cylinder 18 comprises.
  • the pressure room 14 is via a feed line 17 and a check valve 16 with a Pressure transmission medium, in particular oil, can be filled and via a discharge line 6 can be emptied, in which a check valve 9 and a throttle element 7 in a row are arranged.
  • a holding part 19 is slidably arranged on the actuating cylinder 18, which projects axially on both sides via the actuating cylinder 18 and into the displacement path of the Actuating cylinder 18 has protruding limit stops 5, 11.
  • the holding part 19 is further provided with a bottom on which the cam element 1 rests. Between the actuating cylinder 18 and the holding part 19, a compression spring 4 is provided, which Holding part 19 presses against the cam element 1.
  • a locking element 8 is connected to the holding part 19, so that when the holding part 19 is moved, the locking element 8 is also moved, and the check valve 9 opens or closes.
  • the valve train now works as follows: At the beginning of the opening phase of the valve 13, the cam element 1 has the position shown in FIG. 1, in which the on the contour of the base circle 3 between the free space 2 and the cam area lying circumferential section rests on the holding part 19. If the cam element 1 rotates in the direction of the arrow in the position shown in Fig. 2, the holding part 19 pushed down. The actuating cylinder 18 lies on the stop 5 of the holding part and is also moved. The check valve 16 blocks the feed line 17, and that Blocking element 8 blocks the discharge line 6, so that the one enclosed in the pressure chamber 14 Pressure transmission medium can not escape. The loading by the Cam element 1 is thus transmitted directly to the piston 10, which is on the valve lifter is applied.
  • valve 13 lifts off the valve seat 12 and opens the inlet or Outlet region. With the further rotation in the position of FIG. 3, the relative remain Positions of all parts to each other unchanged, so that the valve 13 through the Valve spring 15 is moved back into the valve seat 12.
  • the derivative 6 remains locked, and the volume of the pressure chamber 14 unchanged. Since also the actuating cylinder 18 abuts the stop 5, the holding part 19 follows the receding contour of the Cam area until base circle 3 is reached.
  • the compression spring 4 takes over the further displacement of the Holding part 19, and the blocking element 8 from the check valve 9 - at least schematically - pulled out so that the derivative 6 is opened.
  • excess Pressure transmission medium can be braked by the throttle element 7 from the Drain pressure chamber 14.
  • a lower stop 15 of the holding element 19 limits the Effect of the compression spring 4, i.e. the actuating cylinder 18 can only touch the system on Stop 11 are moved, causing an excessive reduction in Pressure chamber volume is prevented despite the open shut-off 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)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
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 true EP1234957A2 (fr) 2002-08-28
EP1234957A3 EP1234957A3 (fr) 2003-01-08
EP1234957B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006037408A1 (fr) * 2004-10-02 2006-04-13 Schaeffler Kg Mecanisme de distribution variable de moteur a combustion interne
WO2010012864A1 (fr) * 2008-07-31 2010-02-04 Wärtsilä Finland Oy Dispositif de commande dans un moteur à piston

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124184A1 (de) 1991-07-20 1993-01-21 Schaeffler Waelzlager Kg Hydraulischer tassenstoessel

Family Cites Families (5)

* 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
DE19653459A1 (de) * 1996-12-20 1998-06-25 Schaeffler Waelzlager Ohg Stößel für einen Ventiltrieb einer Brennkraftmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124184A1 (de) 1991-07-20 1993-01-21 Schaeffler Waelzlager Kg Hydraulischer tassenstoessel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006037408A1 (fr) * 2004-10-02 2006-04-13 Schaeffler Kg Mecanisme de distribution variable de moteur a combustion interne
WO2010012864A1 (fr) * 2008-07-31 2010-02-04 Wärtsilä Finland Oy Dispositif de commande dans un moteur à piston

Also Published As

Publication number Publication date
ES2217209T3 (es) 2004-11-01
EP1234957A3 (fr) 2003-01-08
ATE263309T1 (de) 2004-04-15
EP1234957B1 (fr) 2004-03-31
DE50200316D1 (de) 2004-05-06

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