EP0733783B1 - Schwinghebel-Anordnung zur Betätigung eines Hubventils - Google Patents
Schwinghebel-Anordnung zur Betätigung eines Hubventils Download PDFInfo
- Publication number
- EP0733783B1 EP0733783B1 EP96101130A EP96101130A EP0733783B1 EP 0733783 B1 EP0733783 B1 EP 0733783B1 EP 96101130 A EP96101130 A EP 96101130A EP 96101130 A EP96101130 A EP 96101130A EP 0733783 B1 EP0733783 B1 EP 0733783B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rocking lever
- valve
- cam
- axis
- 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.)
- Expired - Lifetime
Links
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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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
-
- 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
- F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
Definitions
- the invention relates to a rocker arm arrangement for a switchable valve train an internal combustion engine, according to that mentioned in the preamble of claim 1 Type and is based on EP-A-0 416 628.
- a disadvantage of this construction is an increased space requirement, since the common Axle piece clearly protrudes over the tilt axis.
- WO-A-800 00 94 there is also a rocker arm arrangement for two with one another couplable rocker arms in connection with a valve lash adjuster described. Contrary to the arrangement in EP-A-0 416 628 these are designed for the operation of only one globe valve.
- the second rocker arm is arranged in an opening of the first rocker arm and the common Axle piece is on the side facing the globe valve. On the, the side facing away from the lift valve is the first rocker arm on the valve lash adjuster supported.
- the activation or deactivation of the second Rocker arm is carried out via a magnetic coil and a lever mechanism.
- the object of the invention is therefore a particularly compact, reliable and simple construction to show with the help of a rocker arm assembly according to the preamble of the main claim an automatic (resting) Valve clearance compensation can be realized.
- This object is achieved by the features in the characterizing part of claim 1 solved.
- This arrangement has both rocker arms the same axis of rotation in one plane. This makes it simple and reliable Kinematic arrangement of the rocker arms realized in an advantageous manner can be built very small. In addition, this arrangement ensures the Another degree of freedom of the rocker arm in the direction of the axis of rotation.
- FIG. 1 shows a side view
- FIG. 2 shows a supervision with the omission of the two cams acting on the rocker arms
- 3 shows section A-A from FIG. 2.
- Lift valve for example intake valve
- This globe valve can be opened 1 by a rocker arm arrangement 2, consisting of two rocker arms 2a, 2b during the closing movement of the lift valve 1 as usual by a valve closing spring 3 is initiated.
- the two rocker arms 2a, 2b are arranged side by side, as in particular Fig. 2 shows, with the first rocker arm 2a forked is formed and quasi encloses the second rocker arm 2b.
- the first rocker arm 2a acts with its free end 4 directly on the free end of the shaft of the Lift valve 1 on.
- Each of the rocker arms 2a, 2b acts with its own Cams 8, 8 'together.
- Two first cams 8 roll on the formed as sliding blocks 9 contact surfaces of the first Rocking lever 2a and call for themselves a relatively small valve lift curve of the lift valve 1 out.
- a second cam 8 ' on the other hand designed larger valve stroke course and between the two first cams 8 is arranged, acts on the second rocker arm 2b and for this purpose rolls on an Swing lever 2b suitably fastened roller 10.
- the aim of the described rocker arm arrangement is to be simple 2 for actuating a globe valve 1 automatic valve clearance compensation, in particular a hydraulic valve clearance compensation can be realized.
- a hydraulic valve clearance compensation can be realized.
- is only a single rocker arm is provided, so usually an automatic valve clearance compensation realized that this is the only rocker arm of a globe valve on a hydraulic Valve clearance compensation element is supported.
- the axle piece 13 is in a preferred embodiment of the invention on the receptacle 11 'of the valve clearance compensation element 11 pressed on.
- the rocker arm 2a, 2b forms the axis piece 13 or its longitudinal axis of symmetry doing the axis of rotation when this rocker arm 2a, 2b deflected under the action of the rotating cams 8, 8 ' become.
- a torsion leg spring 14 is provided, which a permanent contact between the rocker arm 2b and the cam 8 'assigned to it.
- this torsion leg spring 14 instead but also another suitable spring element can be used, essentially the cam 8 'arranged opposite to the rocking lever 2b.
- the locking piston 5 is in the Free end 4 of the first rocker arm 2a mounted.
- a return spring 15 is provided, which the locking piston 5 usually in the decoupled position holds, d. H. is under the force of the return spring 15 the locking piston 5 completely within of the free end 4 of the first rocker arm 2a, so that the two rocker arms 2a, 2b decoupled from each other are.
- This state is in Fig. 1 for the lower half and in Fig. 2 for the upper half of the locking piston 5 shown.
- the locking piston 5 can now Arrow direction 6 partially from the free end 4 of the Rocker arm 2a are pushed out and into the Get the mounting hole 7 in the second rocker arm 2b, as in Fig. 1 for the upper half and in Fig. 2 for the lower half of the locking piston 5 is shown. Then the two rocker arms 2a, 2b are together positively connected or coupled to each other.
- Hydraulic medium is applied to the second rocker arm 2b opposite side of the locking piston 5 by a Hydraulic channel 16, which is located in the first rocker arm 2a, fed.
- the hydraulic medium is removed a storage room of the hydraulic, not shown Valve clearance compensation element 11, but the this valve lash compensation element 11 is provided as usual and is known to the person skilled in the art via one in the recording 11 'provided channel bore.
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)
Description
Claims (5)
- Schwinghebelanordnung (2) für einen schaltbaren Ventiltrieb einer Brennkraftmaschine, bestehend auseinem ersten Schwinghebel (2a) und einem zweiten Schwinghebel (2b),einem ersten Nocken (8) und einem zweiten Nocken (8'),einem Ventilspielausgleichselement (11),und zumindest einem Ventil (1), wobei
der zweite Schwinghebel (2b) mit dem ersten Schwinghebel (2a) koppelbar ist und
der zweite Schwinghebel (2b) um ein, mit dem ersten Schwinghebel (2a) gemeinsames Achsstück (13), das eine zweite, zur ersten Drehachse parallele Drehachse bildet, drehbar gelagert ist und
der erste Nocken (8), mit einer von dem zweiten Nocken (8') unterschiedlichen Nockenerhebung, in Ventilöffnungsrichtung auf den ersten Schwinghebei (2a) und der zweite Nocken (8') in Ventilöffnungsrichtung auf den zweiten Schwinghebel (2b) einwirkt,
dadurch gekennzeichnet, dass die zweite Drehachse in dem gemeinsamen Achsstück (13) die einzige Drehachse für beide Schwinghebel (2a, 2b) ist und das Ventilspielausgleichselement (11) ein hydraulisches Ventifspielausgleichselement ist. - Schwinghebel-Anordnung nach Anspruch 1,
dadurch gekennzeichnet, daß das Achsstück (13) auf die Aufnahme (11') des Ventilspiel-Ausgleichselementes (11) aufgepreßt ist. - Schwinghebel-Anordnung nach Anspruch 1 oder 2, wobei ein die Koppelung bewerkstelligender Verriegelungskolben (5) gegen Federkraft durch ein über die Schwinghebel-Lagerstelle zugeführtes Hydraulikmedium bewegbar ist,
dadurch gekennzeichnet, daß das Hydraulikmedium dem Vorratsraum des hydraulischen Ventilspielausgleichselementes (11) entnommen wird. - Schwinghebelanordnung nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, dass am zweiten Schwinghebel (2b) auf der dem Nocken (8') gegenüberliegenden Seite ein insbesondere als Torsionsschenkelfeder (14) ausgebildetes Federelement angreift. - Schwinghebel-Anordnung nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß der erste Schwinghebel (2a) gegabelt ausgebildet ist und den zweiten Schwinghebel (2b) umgreift.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19510106A DE19510106A1 (de) | 1995-03-20 | 1995-03-20 | Schwinghebel-Anordnung |
DE19510106 | 1995-03-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0733783A1 EP0733783A1 (de) | 1996-09-25 |
EP0733783B1 true EP0733783B1 (de) | 2002-04-24 |
Family
ID=7757197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96101130A Expired - Lifetime EP0733783B1 (de) | 1995-03-20 | 1996-01-26 | Schwinghebel-Anordnung zur Betätigung eines Hubventils |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0733783B1 (de) |
DE (2) | DE19510106A1 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5615647A (en) * | 1995-03-28 | 1997-04-01 | Eaton Corporation | Latch assembly for a valve control system |
US5584267A (en) * | 1995-12-20 | 1996-12-17 | Eaton Corporation | Latchable rocker arm mounting |
DE19744600A1 (de) * | 1997-10-09 | 1999-04-15 | Volkswagen Ag | Abschaltbarer Ventiltrieb für Brennkraftmaschinen |
DE10226822A1 (de) * | 2002-06-15 | 2004-01-08 | Ina-Schaeffler Kg | Schlepphebel eines Ventiltriebs einer Brennkraftmaschine |
DE10226821A1 (de) * | 2002-06-15 | 2003-12-24 | Ina Schaeffler Kg | Schlepphebel eines Ventiltriebs einer Brennkraftmaschine |
EP1568859B1 (de) * | 2004-02-25 | 2008-05-14 | Delphi Technologies, Inc. | Kipphebeleinrichtung für Ventilsteuerung |
DE102005037053A1 (de) * | 2005-08-05 | 2007-02-08 | Schaeffler Kg | Schaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine |
US7484487B2 (en) * | 2005-11-21 | 2009-02-03 | Eaton Corporation | Dual lift rocker arm latch mechanism and actuation arrangement therefor |
DE102006026393A1 (de) * | 2006-06-07 | 2007-12-13 | Schaeffler Kg | Schaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine |
DE102006027805A1 (de) * | 2006-06-16 | 2007-12-20 | Schaeffler Kg | Ventiltrieb einer Brennkraftmaschine mit wenigstens einem schaltbaren Schlepphebel |
DE102006029178A1 (de) * | 2006-06-24 | 2007-12-27 | Bayerische Motoren Werke Ag | Schlepphebel |
DE102006031945A1 (de) * | 2006-07-11 | 2008-01-24 | Schaeffler Kg | Schaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine |
DE102007007604A1 (de) * | 2007-02-13 | 2008-08-14 | Mahle International Gmbh | Nockentrieb |
US7878168B2 (en) | 2007-02-16 | 2011-02-01 | GM Global Technology Operations LLC | High performance overhead valvetrain assembly |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2821178A (en) * | 1954-09-22 | 1958-01-28 | Daimler Benz Ag | Valve control for internal combustion engines |
DE2753197A1 (de) * | 1976-12-15 | 1978-06-22 | Eaton Corp | Ventilsteuervorrichtung |
US4203397A (en) * | 1978-06-14 | 1980-05-20 | Eaton Corporation | Engine valve control mechanism |
US4768467A (en) * | 1986-01-23 | 1988-09-06 | Fuji Jukogyo Kabushiki Kaisha | Valve operating system for an automotive engine |
GB2199894B (en) * | 1987-01-08 | 1990-10-24 | Honda Motor Co Ltd | Valve operating device in internal combustion engine |
JP2568855B2 (ja) * | 1987-09-19 | 1997-01-08 | マツダ株式会社 | エンジンの動弁装置 |
JPH0396607A (ja) * | 1989-09-08 | 1991-04-22 | Nissan Motor Co Ltd | エンジンの弁作動装置 |
GB9003603D0 (en) * | 1990-02-16 | 1990-04-11 | Lotus Group Plc | Cam mechanisms |
JP2944264B2 (ja) * | 1991-07-23 | 1999-08-30 | 株式会社ユニシアジェックス | 内燃機関の動弁装置 |
US5445116A (en) * | 1992-12-22 | 1995-08-29 | Unisia Jecs Corporation | Hydraulic variable lift engine valve gear |
-
1995
- 1995-03-20 DE DE19510106A patent/DE19510106A1/de not_active Withdrawn
-
1996
- 1996-01-26 EP EP96101130A patent/EP0733783B1/de not_active Expired - Lifetime
- 1996-01-26 DE DE59609114T patent/DE59609114D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE19510106A1 (de) | 1996-09-26 |
DE59609114D1 (de) | 2002-05-29 |
EP0733783A1 (de) | 1996-09-25 |
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