EP0686756B1 - Ventiltrieb mit variabler und unabhängiger Steuerung des Ventilöffnungswinkels und des Ventilhubs - Google Patents
Ventiltrieb mit variabler und unabhängiger Steuerung des Ventilöffnungswinkels und des Ventilhubs Download PDFInfo
- Publication number
- EP0686756B1 EP0686756B1 EP95106520A EP95106520A EP0686756B1 EP 0686756 B1 EP0686756 B1 EP 0686756B1 EP 95106520 A EP95106520 A EP 95106520A EP 95106520 A EP95106520 A EP 95106520A EP 0686756 B1 EP0686756 B1 EP 0686756B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- control
- lever
- variable
- drive according
- 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
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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
- F01L13/0063—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
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- 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
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
-
- 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
- F01L13/0005—Deactivating valves
-
- 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
- F01L13/0021—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 by modification of rocker arm ratio
-
- 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
- F01L2303/00—Manufacturing of components used in valve arrangements
- F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
-
- 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
- F01L2800/00—Methods of operation using a variable valve timing mechanism
- F01L2800/13—Throttleless
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F2001/244—Arrangement of valve stems in cylinder heads
- F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis
Definitions
- the invention is based on the preamble of claim 1 WO-A-94/13935 (publication date 06/23/94).
- the subject of this document is a valve train with a control device for variable change in the opening and closing of a globe valve at essentially constant valve lift.
- a control cam acts in this control device a camshaft, for example, via a roller serving as an intermediate element and a valve lever on the lift valve.
- To change the valve opening period is the roller along a path concentric to the camshaft axis in the Movable valve lever.
- the invention is based, this known valve train for a task to further develop effective load control.
- variable stroke control with the variable control of the valve opening angle in the known valve train is a targeted load control Internal combustion engine possible.
- the stroke of the gas exchange valve according to the respective load can be varied and that over the entire valve stroke, whereby both controls from each other be brought into effect independently.
- variable stroke control a valve lever with variable translation selected.
- a variable valve lift control using a variable valve lever ratio known per se from US-A 3 166 057, but not more variable with the circumstance Valve opening angle, so that an additional speed-dependent influence in contrast to load control via early or late opening and closing angles is not given to the invention.
- a control cam 2 of a camshaft 3 actuates a gas exchange valve 4 via a valve lever 5.
- the valve lever is a rocker arm 6, the On the control cam side, one concentrically arranged to the axis 7 of the camshaft 3 Guide 8 has.
- an intermediate element designed as a roller 9 10 via a control device 11 according to FIG the arrow directions A and B relative to the rotating control cam 2 the same and oppositely controlled.
- the positively controlled roller 9 is above crank arms 12, for example, with a crank mechanism (not shown) of the control device 11 in drive connection, the crank mechanism being synchronous with the camshaft 3 turns.
- Purpose of relative to the rotating control cam 2 according to the arrows A and B relocatable roller 9 is the action of the control cam 2 on the Rocker arm 6 for actuating the gas exchange valve 4 early or late shift and thus different valve opening angles or different lengths To achieve valve opening periods. (Further details in the PCT / EP mentioned at the beginning 93/03451.)
- This control device 11 for variable valve opening angles or connected thereto for variable valve spread is combined according to the invention with a variable Stroke control 13 for the gas exchange valve 4.
- variable stroke control because of its simple construction 13 comprises a valve lever 5 with variable translation.
- a compact design with a low overall height results in a rocker arm 6 designed valve lever 5, the rocker arm 6 between its two end regions an arcuate slideway 14 for a displaceable via a rocker 15 Has sliding block 16.
- the rocker 15 is in a cylinder head, not shown the internal combustion engine, preferably slightly below the camshaft the axis of the camshaft is pivotally mounted.
- rocker 15 is with the associated displacement the sliding block 10 along the arcuate slideway 14 the translation of the rocker arm 6 changed. With this changeable translation you get a changeable stroke of the gas exchange valve 4.
- This changeable valve stroke of the Gas exchange valves 4 are used for the targeted load control of an internal combustion engine. Independent of the control device 11 for variable valve opening angles or separately effective variable stroke control 13 can over each selected valve opening angle of the stroke of the gas exchange valve 4 in principle a zero stroke up to a maximum stroke can be varied.
- the rocker arm 6 can in its valve-side end region with a, not shown, automatic valve lash adjuster can be combined.
- the combination according to the invention can also be used to achieve that with a chosen translation of the rocker arm 6 and thus at a constant Stroke of the gas exchange valve 4 valve opening angles via the control device 11 can be varied.
- the rocker 15 is driven in a map-controlled manner (Not shown).
- This configuration advantageously enables the variable valve opening angle control 11 in combination with the variable Stroke control 13 takes over the function of a load control member and thus one Load control element usually designed as a throttle valve can be omitted.
- FIG. 2 It can be seen from FIG. 2 that for several gas exchange valves 4 of the same type a rocker 15 acting together can be used. In the shown in Figure 2 Arrangement of the similar gas exchange valves 4 can either one Cylinder of an internal combustion engine or two adjacent cylinders of an internal combustion engine belong to.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
- Figur 1
- den erfindungsgemäßen Ventiltrieb in Seitenansicht, und
- Figur 2
- den erfindungsgemäßen Ventiltrieb in perspektivischer Ansicht für zwei gleichartige Gaswechselventile einer nicht näher dargestellten Brennkraftmaschine.
Claims (8)
- Ventiltrieb für Brennkraftmaschinen mit einer Steuereinrichtung (11) für variable Ventilöffnungswinkel,bei der ein Steuernocken (2) einer Nockenwelle (3) ein Gaswechselventil (4) über einen Ventilhebel (5) betätigt, dermit dem Steuernocken (2) über ein zur Achse (7) der Nockenwelle (3) konzentrisch geführtes Zwischenelement (10; 9) zusammenwirkt, dasmittels einer drehwinkelverstellbaren Steuereinrichtung (11) mit dem drehenden Steuernocken (2) synchron zu diesem relativ gleich- und gegensinnig zwangsgesteuert ist, wobeidie variable Ventilöffnungswinkel-Steuerungseinrichtung (11) mit einer von dieser Steuereinrichtung (11) unabhängig bzw. gesondert wirksamen variablen Hubsteuerung (13) für das Gaswechselventil (4) kombiniert als ein Laststeuerorgan/Drosselklappe der Brennkraftmaschine dient.
- Ventiltrieb nach Anspruch 1, dadurch gekennzeichnet, daß als variable Hubsteuerung (13) ein Ventilhebel (5) mit veränderbarer Übersetzung dient.
- Ventiltrieb nach Anspruch 1 und 2, dadurch gekennzeichnet,daß der als ein Kipphebel (6) gestaltete Ventilhebel (5) im steuernockenseitigen Endbereich eine zur Nockenwellen-Achse (7) im wesentlichen konzentrische Führungsbahn (8) für das Zwischenelement (10) aufweist, undferner zwischen dem ventilseitigen und dem steuernockenseitigen Endbereich eine bogenförmige Gleitbahn (14) aufweist, diemit einem an einer verlagerbaren Schwinge (15) kippbeweglich angeordneten Gleitstein zur Änderung der Ventilhebel-Übersetzung zusammenwirkt.
- Ventiltrieb nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß der Kipphebel (6) im ventilseitigen Endbereich mit einer selbsttätigen VentilspielAusgleichseinrichtung kombiniert ist.
- Ventiltrieb nach Anspruch 3, dadurch gekennzeichnet, daß die Schwinge (15) nockenwellenseitig in/an einem Zylinderkopf der Brennkraftmaschine gelagert ist.
- Ventiltrieb nach den Ansprüchen 3 bis 5, dadurch gekennzeichnet, daß die Schwinge (15) kennfeldgesteuert angetrieben ist.
- Ventiltrieb nach den Ansprüchen 3 bis 6, dadurch gekennzeichnet, daß an der Schwinge (15) eine Feder (17) angeordnet ist, die am Kipphebel (6) vorgespannt gleitbeweglich anliegt.
- Ventiltrieb nach den Ansprüchen 3 bis 7, dadurch gekennzeichnet, daß mehrere Ventilhebel (5) für gleichartige Gaswechselventile (4) eine einzige Schwinge (15) zugeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4420064A DE4420064A1 (de) | 1994-06-08 | 1994-06-08 | Ventiltrieb mit variabler Steuerung der Ventilöffnungswinkel |
DE4420064 | 1994-06-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0686756A1 EP0686756A1 (de) | 1995-12-13 |
EP0686756B1 true EP0686756B1 (de) | 1999-09-22 |
Family
ID=6520114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95106520A Expired - Lifetime EP0686756B1 (de) | 1994-06-08 | 1995-04-29 | Ventiltrieb mit variabler und unabhängiger Steuerung des Ventilöffnungswinkels und des Ventilhubs |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0686756B1 (de) |
DE (2) | DE4420064A1 (de) |
ES (1) | ES2137396T3 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19532334A1 (de) * | 1995-09-01 | 1997-03-06 | Bayerische Motoren Werke Ag | Variabler Ventiltrieb, insbesondere für Brennkraftmaschinen |
US5937809A (en) * | 1997-03-20 | 1999-08-17 | General Motors Corporation | Variable valve timing mechanisms |
DE19825308A1 (de) * | 1998-06-05 | 1999-12-09 | Bayerische Motoren Werke Ag | Variabler Ventiltrieb für eine Brennkraftmaschine |
DE19960742B4 (de) * | 1999-12-16 | 2006-09-28 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Variabler Ventiltrieb, vorzugsweise für Verbrennungsmotoren |
DE102004035005A1 (de) | 2004-07-20 | 2006-02-16 | Bayerische Motoren Werke Ag | Ventiltrieb einer Brennkraftmaschine |
FR2986558B1 (fr) * | 2012-02-02 | 2014-03-07 | Melchior Jean F | Dispositif de commande variable d'au moins une soupape, par exemple pour un moteur alternatif |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1401228A1 (de) * | 1959-10-17 | 1968-12-19 | Maschf Augsburg Nuernberg Ag | Dieselmotor und selbstzuendender Mitteldruckmotor |
US4382428A (en) * | 1981-06-08 | 1983-05-10 | Tourtelot Jr Edward M | Contoured finger follower variable valve timing mechanism |
US4469056A (en) * | 1983-02-22 | 1984-09-04 | Tourtelot Jr Edward M | Dual follower variable valve timing mechanism |
US4986227A (en) * | 1990-05-08 | 1991-01-22 | Dewey Iii Albert B | Variable lift valve train |
DE4220816A1 (de) * | 1992-06-25 | 1994-01-05 | Schaeffler Waelzlager Kg | Variable Ventilsteuerung mittels Änderung der Hebelverhältnisse bei Kipp- oder Schlepphebeln von Ventiltrieben |
-
1994
- 1994-06-08 DE DE4420064A patent/DE4420064A1/de not_active Withdrawn
-
1995
- 1995-04-29 EP EP95106520A patent/EP0686756B1/de not_active Expired - Lifetime
- 1995-04-29 DE DE59506871T patent/DE59506871D1/de not_active Expired - Lifetime
- 1995-04-29 ES ES95106520T patent/ES2137396T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0686756A1 (de) | 1995-12-13 |
ES2137396T3 (es) | 1999-12-16 |
DE59506871D1 (de) | 1999-10-28 |
DE4420064A1 (de) | 1995-12-14 |
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