EP0331901A2 - Entraînement de soupape pour une soupape à levée - Google Patents

Entraînement de soupape pour une soupape à levée Download PDF

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Publication number
EP0331901A2
EP0331901A2 EP89101791A EP89101791A EP0331901A2 EP 0331901 A2 EP0331901 A2 EP 0331901A2 EP 89101791 A EP89101791 A EP 89101791A EP 89101791 A EP89101791 A EP 89101791A EP 0331901 A2 EP0331901 A2 EP 0331901A2
Authority
EP
European Patent Office
Prior art keywords
valve
eccentric disc
recess
spring
rocker arm
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
EP89101791A
Other languages
German (de)
English (en)
Other versions
EP0331901B1 (fr
EP0331901A3 (en
Inventor
Dieter Voigt
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.)
VOIGT, DIETER
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0331901A2 publication Critical patent/EP0331901A2/fr
Publication of EP0331901A3 publication Critical patent/EP0331901A3/de
Application granted granted Critical
Publication of EP0331901B1 publication Critical patent/EP0331901B1/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

Definitions

  • the invention relates to a valve drive according to the preamble of the claim.
  • a valve drive according to the preamble of the claim.
  • Such a purely mechanical valve lash adjuster has the advantage over the widely used hydraulically operating compensation elements that it has no dependence on the oil circuit of the machine equipped with the valve.
  • a valve drive according to the preamble of claim is known from DE-PS 1 187 061 in such a way that the rocker arm is provided in the region of its end resting on the free end of the valve stem with a compensating piece, which by means of an additional retaining clip in a cylindrical friction pan rests on the actual rocker arm, which is formed transversely to the pivoting plane of the rocker arm as an inclined plane.
  • This known device has in particular the disadvantages that the actual device for eliminating valve clearance considerably increases the oscillating mass of the rocker arm and that it therefore also requires a relatively large amount of space because the inclined plane must ensure a relatively large adjustment range for the compensating piece.
  • the invention has for its object to provide a valve drive according to the preamble of claim so that the mechanical device for eliminating valve clearance practically does not increase the oscillating mass of the rocker arm and the dimensions of this device to ensure the required adjustment range are relatively small.
  • each extension of one of the lever arms also means a shortening of the other lever arm, so that the design of the device for valve clearance removal takes up little space .
  • Fig. 1 shows a side view, partly in section, while Fig. 2 is a plan view.
  • the essential components of the valve drive are the cam 1 rotating in the direction of the arrow, which in the case of an internal combustion engine is driven in a conventional manner on a cam driven by the machine itself Camshaft is seated, and the rocker arm 2, which swings about the pivot axis 3, which is mounted in a stationary and rotationally fixed manner.
  • the axis of the pivot axis 3 is designated 4;
  • the rocker arm 2 swings about this axis 4 in certain operating phases of the valve drive.
  • rocker arm 2 with its right end in the figures in this exemplary embodiment rests on the rotating cam via the rollers 5 for the purpose of reducing friction and accordingly takes part in its lifting movements
  • its left end in the figure is at 6 for rolling support on the free end of the valve stem 7 set up; only the closing spring 8 of the lift valve is shown, since it is a well-known construction.
  • the circular disc-shaped eccentric disc 9 is mounted on the pivot axis 3 with frictional engagement, which is provided with the recess 10 for receiving one end of the spring 11 acting in the circumferential direction, the other end of which is inserted into the recess 12 of the pivot axis.
  • the two parts 3 and 9 are thus resiliently braced against each other.
  • the axis of the eccentric 9 is designated 13.
  • the eccentric disc 9 is frictionally surrounded by the cylindrical bush 14, which has the recess 15 for receiving the radial stop 16 on the pivot axis 3. 1, the two edges 17 and 18 of this radial recess 15 enclose the radial stop 16 with limited circumferential play.
  • the eccentricity e of the eccentric disk 9 extends practically in the direction of the axis of the rocker arm 2 in the drawn position of the various components of the valve drive when the valve is closed (the valve stem 7 has reached its highest position) the limited play between the edges 17 and 18 of the recess 15 and the direction of the spring 11 on the eccentric disc 9 exerted swivel torque, this results in the following operation of the valve drive shown:

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)
EP19890101791 1988-02-05 1989-02-02 Entraînement de soupape pour une soupape à levée Expired - Lifetime EP0331901B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3803442 1988-02-05
DE3803442 1988-02-05

Publications (3)

Publication Number Publication Date
EP0331901A2 true EP0331901A2 (fr) 1989-09-13
EP0331901A3 EP0331901A3 (en) 1989-10-18
EP0331901B1 EP0331901B1 (fr) 1993-11-18

Family

ID=6346693

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890101791 Expired - Lifetime EP0331901B1 (fr) 1988-02-05 1989-02-02 Entraînement de soupape pour une soupape à levée

Country Status (1)

Country Link
EP (1) EP0331901B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10105807C1 (de) * 2001-02-08 2002-05-08 Hatz Motoren Kipphebel für einen Ventiltrieb eines Verbrennungsmotors mit Vorrichtung zur selbsttätigen Ein-/Nachstellung des Ventilspiels
CN111902614A (zh) * 2018-03-29 2020-11-06 本田技研工业株式会社 内燃机的气门传动机构

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1979348A (en) * 1932-06-18 1934-11-06 Robert C Russell Valve operating mechanism
GB534655A (en) * 1939-08-09 1941-03-13 Thompson Prod Inc Improvements in or relating to valve tappet mechanisms and like vibratory mechanicallinkages
US3087478A (en) * 1961-11-13 1963-04-30 Earl A Thompson Mfg Company Lash adjusting device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10105807C1 (de) * 2001-02-08 2002-05-08 Hatz Motoren Kipphebel für einen Ventiltrieb eines Verbrennungsmotors mit Vorrichtung zur selbsttätigen Ein-/Nachstellung des Ventilspiels
WO2002063142A1 (fr) 2001-02-08 2002-08-15 Motorenfabrik Hatz Gmbh & Co. Kg Culbuteur pour mecanisme de distribution de moteur a combustion interne et dispositif d'ajustement/reajustement automatique du jeu des soupapes
US6612278B2 (en) 2001-02-08 2003-09-02 Motorenfabrik Hatz Gmbh & Co. Rocker lever for valve operation of an internal combustion engine with device for automatic adjustment/readjustment of valve clearance
CN111902614A (zh) * 2018-03-29 2020-11-06 本田技研工业株式会社 内燃机的气门传动机构
CN111902614B (zh) * 2018-03-29 2021-12-21 本田技研工业株式会社 内燃机的气门传动机构

Also Published As

Publication number Publication date
EP0331901B1 (fr) 1993-11-18
EP0331901A3 (en) 1989-10-18

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