EP1022443A1 - Vorrichtung zur variablen Steuerung eines Ventils einer Brennkraftmaschine - Google Patents
Vorrichtung zur variablen Steuerung eines Ventils einer Brennkraftmaschine Download PDFInfo
- Publication number
- EP1022443A1 EP1022443A1 EP99100855A EP99100855A EP1022443A1 EP 1022443 A1 EP1022443 A1 EP 1022443A1 EP 99100855 A EP99100855 A EP 99100855A EP 99100855 A EP99100855 A EP 99100855A EP 1022443 A1 EP1022443 A1 EP 1022443A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- scanning
- spring
- rocker arm
- camshafts
- 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
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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
- F01L13/0047—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 the movement of the valves resulting from the sum of the simultaneous actions of at least two cams, the cams being independently variable in phase in respect of each other
Definitions
- the invention relates to a device for variable Control of a valve of an internal combustion engine, with two camshafts to open and close the valve, their Phase relationship to each other for changing stroke and / or Opening duration of the valve is changeable, also with a Scanning device for simultaneous scanning of the cam contours both camshafts and with an actuator to transmit the movement of the scanner the valve, the valve being in by a valve spring Is closed.
- Such devices are for example from the EP 0 659 232 B1 known.
- Actuator as a rocker arm is on this one Slideway provided on which the scanning device back and forth is movably guided or stored.
- Using a compression spring becomes the scanner on one of the camshafts kept in a defined facility.
- This can be done in one Cylinder surface of an camshaft an additional stop element be stored with a circular body on the rocker arm and in the closed position of the valve is supported on a cylinder surface of the other camshaft.
- the disadvantage of these previously known devices is that with linear sliding displacements the lubrication conditions are unfavorable and therefore friction and wear relative are high. In addition, increased friction also fuel consumption increases.
- the rocker arm operates the valve and is on one End of the link lever rotatably mounted.
- the link lever is fixed at the other end and is supported by a spring biased towards one of the camshafts. Training a rocker arm and the additional scanning device are expensive to manufacture and assemble.
- the present invention has the object based on improving a generic device so that they are both low friction and easy to wear is trained.
- this object is achieved in a device initially mentioned type solved in that the scanning device is rotatably attached to the end of an articulated rod, the other end rotatably attached to the actuator is.
- the scanning device is advantageously on a Common axis arranged rollers formed. With this Measure is a simple rotatable attachment of the scanner reached at the end of the joint rod and thus the Manufacturing effort further reduced.
- the scanning device is a favorable development of the invention by a spring device in contact with at least held a camshaft. As a result, the scanner is located in a defined position at all times.
- a gear ratio between the movement of the scanner and the movement of the one resting on the valve Point of contact of the rocker arm can be determined, whereby the closer the joint rod is, the greater the ratio is attached to the fixed mounting of the rocker arm.
- the speed of the occurring rotary movement influenced, which in turn the resulting friction can be reduced.
- the scanning device is very particularly preferred by a substantially in the longitudinal direction of the rocker arm spring force acting on at least one camshaft held. Using these measures will be simple Maintain a defined position of the scanner.
- the actuator can be designed as a tappet be and the joint rod in the extension of the central axis of the valve on the tappet.
- the spring device has a spiral spring surrounding the valve spring, one end of which is fixed to the valve, the other end of which rests on the tappet and the scanning device stops in contact with both camshafts.
- a gap to the second camshaft is also avoided, so that the attachment of the scanner to both Camshafts is defined.
- the rotatable fastenings of the scanning and actuator on the joint rod as a needle bearing be trained.
- roller bearings or ball bearings- needle bearings are special suitable for shock loads and swiveling movements and also lighter, which leads to a not inconsiderable weight saving leads.
- Fig. 1 of an inventive Device has two camshafts 1a, 1b, as Scanning device a roll package 2, as an actuating device a rocker arm 3 and an articulated rod 4, by means of which the roller set 2 is connected to the rocker arm 3 is.
- the two camshafts 1a, 1b have cam contours 5a, 5b on, each an area 6 small increase to Closing the valve 7 and an area 8 of greater increase train to open the valve 7. Both cam contours 5a, 5b can abut the roll package 2 at the same time, so that the roller set 2 is the sum of the two cam contours 5a, 5b scans and over the joint rod 4 and the Rocker arm 3 passes on to the valve 7.
- By change the phase relationship of the two camshafts 1a, 1b to each other can by overlapping the two cam contours 5a, 5b resulting stroke and / or the resulting opening time of the valve 7 can be changed, whereby a variable Control of the valve 7 is enabled.
- the role package 2 exists in the example shown (cf. 4) from three mutually parallel rollers 2a, 2b, 2c, those on a common axis 9 at a distance 10 from each other are arranged in the longitudinal axis direction.
- the joint rod 4 is U-shaped or fork-shaped, wherein the two legs 11, 12 of the U are in the two distances 10a, 10b or spaces between the rollers 2a, 2b, 2c and the axis 9 in through openings store rotatable.
- the base of the U extends parallel to axis 9, a further passage opening through which through which a bolt 13 runs with which the articulated rod 4 is rotatably mounted on the rocker arm 3 (Fig. 1).
- the rocker arm 3 is rotatably mounted at one end 14 and lies with its other end 15 on the valve 7 on. Between the support point 14 of the rocker arm 3 and whose fixed bearing 15, the pivot bearing 13 is arranged, with which the articulated rod 4 on the rocker arm 3 is rotatable is attached.
- the roller package 2 is in contact with a compression spring 16 held on one of the camshafts la.
- the compression spring 16 can be designed, for example, as a spiral spring rests with one end on the roll package 2 and their the other end is supported on an abutment 17 which molded onto the fixed end 15 of the rocker arm 3 is.
- the valve 7 is designed as a poppet valve, which in a Valve guide 18 is slidably mounted and by one Valve spring 19 for contacting a (not shown) Valve seat is biased.
- the valve spring 19 is a spiral spring trained, one end of which is on the valve guide 18 is stationary and the other end against the Underside of a valve spring plate attached to the valve stem 20 presses.
- a stop 21 is attached to the free end of the rocker arm 3, which rests on a cylindrical surface of a camshaft la and with which the valve 7 in its closed state is held in a defined position.
- Fig. 2 In the embodiment shown in Fig. 2 is as Actuator provided a tappet 22, the open side facing the camshafts la, 1b.
- the Articulated rod 4 is on the tappet 22 by means of a Pivot bearing 13 attached to the bottom 23 of the tappet 22 is arranged.
- a second coil spring 24 is provided, which Valve spring 19 encloses concentrically.
- This second coil spring 24 is at one end - like the valve spring 19 - mounted on the valve guide 18 stationary and lies with her the other end on the side of the valve 7 facing the Bottom 23 of the tappet 22 on. Through this second coil spring 24 becomes the tappet 22 and with it the joint rod 4 and the roller set 2 to the camshafts 1a, 1b pressed, whereby the roller set 2 always on both camshafts 1a, 1b is present.
- FIGS Another exemplary embodiment is shown in FIGS shown with a tappet 25 as an actuator.
- the open side of the tappet 25 is here facing the valve 7.
- the pivot bearing 13 for connecting the Articulated rod 4 is on the camshafts la, 1b facing Side of the bottom 23 of the tappet 25 attached.
- the roller set 2 is pressed onto one of the camshafts la.
- the spiral spring 26 is V-shaped, wherein it is guided around the pivot bearing 13 and with the outside a leg 27 on the roll package 2 and with the outside of the other leg 28 on the bottom 23 of the tappet 25 is present.
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)
Abstract
Description
- Fig. 1
- eine Vorderansicht einer ersten Ausführungsform einer erfindungsgemäßen Vorrichtung im eingebauten Zustand;
- Fig. 2
- eine der Fig. 1 ähnliche Ansicht einer zweiten Ausführungsform einer erfindungsgemäßen Vorrichtung;
- Fig. 3
- eine der Fig. 1 ähnliche Ansicht einer dritten Ausführungsform einer erfindungsgemäßen Vorrichtung; und
- Fig. 4
- eine Teil-Seitenansicht der Ausführungsform aus Fig. 3.
Claims (9)
- Vorrichtung zur variablen Steuerung eines Ventils einer Brennkraftmaschine, mitzwei Nockenwellen zum Öffnen und Schließen des Ventils, deren Phasenlage zueinander zur Veränderung von Hub und/oder Öffnungsdauer des Ventils veränderbar ist,einer Abtasteinrichtung zum gleichzeitigen Abtasten der Nockenkonturen beider Nockenwellen und miteiner Betätigungseinrichtung zum Übertragen der Bewegung der Abtasteinrichtung auf das Ventil, wobei das Ventil durch eine Ventilfeder in Schließstellung vorgespannt ist,
daß die Abtasteinrichtung (2) am Ende einer Gelenkstange (4) drehbar befestigt ist, deren anderes Ende an der Betätigungseinrichtung (3, 22, 25) drehbar befestigt ist. - Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Abtasteinrichtung (2) durch auf einer gemeinsamen Achse (9) angeordnete Rollen (2a, 2b, 2c) gebildet ist.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Abtasteinrichtung (2) durch eine Federeinrichtung (16, 24, 26) in Anlage an mindestens einer Nokkenwelle (la) gehalten ist.
- Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Betätigungselement als Schlepphebel (3) ausgebildet ist und die Gelenkstange (4) zwischen der Auflage (14) des Schlepphebels (3) auf dem Ventil (7) und der ortsfesten Lagerung (15) des Schlepphebels (3) an diesem drehbar befestigt ist.
- Vorrichtung nach Anspruch 3 und 4, dadurch gekennzeichnet, daß die Abtasteinrichtung (2) durch eine im wesentlichen in Längsrichtung des Schlepphebels (3) wirkende Federkraft (16) in Anlage an mindestens einer Nockenwelle (la) gehalten ist.
- Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Betätigungselement als Tassenstößel (22, 25) ausgebildet ist und die Gelenkstange (4) in Verlängerung der Mittenachse des Ventils (7) am Tassenstößel (22, 25) angreift.
- Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Federeinrichtung eine die Ventilfeder (19) umgebende Spiralfeder (24) aufweist, deren eines Ende zum Ventil (7) ortsfest gehalten ist, deren anderes Ende am Tassenstößel (22, 25) anliegt und die die Abtasteinrichtung (2) in Anlage an beiden Nockenwellen (1a, 1b) hält.
- Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die drehbaren Befestigungen der Abtast- und der Betätigungseinrichtung (2; 3, 22, 25) an der Gelenkstange (4) als Gleitlager ausgebildet sind.
- Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die drehbaren Befestigungen der Abtast- und der Betätigungseinrichtung (2; 3, 22, 25) an der Gelenkstange (4) als Nadellager ausgebildet sind.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59900189T DE59900189D1 (de) | 1999-01-19 | 1999-01-19 | Vorrichtung zur variablen Steuerung eines Ventils einer Brennkraftmaschine |
EP19990100855 EP1022443B1 (de) | 1999-01-19 | 1999-01-19 | Vorrichtung zur variablen Steuerung eines Ventils einer Brennkraftmaschine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19990100855 EP1022443B1 (de) | 1999-01-19 | 1999-01-19 | Vorrichtung zur variablen Steuerung eines Ventils einer Brennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1022443A1 true EP1022443A1 (de) | 2000-07-26 |
EP1022443B1 EP1022443B1 (de) | 2001-08-08 |
Family
ID=8237366
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19990100855 Expired - Lifetime EP1022443B1 (de) | 1999-01-19 | 1999-01-19 | Vorrichtung zur variablen Steuerung eines Ventils einer Brennkraftmaschine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1022443B1 (de) |
DE (1) | DE59900189D1 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10235403A1 (de) * | 2002-08-02 | 2004-02-12 | Bayerische Motoren Werke Ag | Schwenkhebel für einen hubvariablen Ventiltrieb |
EP1426569A1 (de) * | 2002-11-23 | 2004-06-09 | Mechadyne plc | Brennkraftmaschine mit variablem Ventiltrieb |
EP1847691A2 (de) * | 2006-04-21 | 2007-10-24 | Schaeffler KG | Rollenelement für ein schwenkbewegliches Maschinenteil |
US7299774B2 (en) | 2003-01-30 | 2007-11-27 | Mahle Ventiltrieb Gmbh | Valve control |
DE102009041963A1 (de) * | 2009-09-17 | 2011-04-21 | Mahle International Gmbh | Stellvorrichtung und Kopplungseinrichtung |
WO2015020678A1 (en) * | 2013-08-09 | 2015-02-12 | Diggs Matthew B | Helical torsion valve spring assembly |
DE102014003466A1 (de) * | 2014-03-11 | 2015-09-17 | Meta Motoren- Und Energie-Technik Gmbh | Vorrichtung und Verfahren zur variablen Steuerung eines Ventils einer Brennkraftmaschine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5052350A (en) * | 1990-11-02 | 1991-10-01 | King Brian T | Device to combine the motions of two camlobes differentially phased |
EP0659232A1 (de) | 1993-07-06 | 1995-06-28 | Meta Motoren Energietech | Verfahren und vorrichtung zur variablen steuerung eines ventils einer brennkraftmaschine. |
DE19600536A1 (de) * | 1996-01-09 | 1997-07-10 | Meta Motoren Energietech | Vorrichtung zur variablen Steuerung eines Einlaßventils |
DE19701201A1 (de) * | 1997-01-15 | 1998-07-23 | Daimler Benz Ag | Variable Ventilsteuerung für Brennkraftmaschinen |
-
1999
- 1999-01-19 DE DE59900189T patent/DE59900189D1/de not_active Expired - Lifetime
- 1999-01-19 EP EP19990100855 patent/EP1022443B1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5052350A (en) * | 1990-11-02 | 1991-10-01 | King Brian T | Device to combine the motions of two camlobes differentially phased |
EP0659232A1 (de) | 1993-07-06 | 1995-06-28 | Meta Motoren Energietech | Verfahren und vorrichtung zur variablen steuerung eines ventils einer brennkraftmaschine. |
DE19600536A1 (de) * | 1996-01-09 | 1997-07-10 | Meta Motoren Energietech | Vorrichtung zur variablen Steuerung eines Einlaßventils |
DE19701201A1 (de) * | 1997-01-15 | 1998-07-23 | Daimler Benz Ag | Variable Ventilsteuerung für Brennkraftmaschinen |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10235403A1 (de) * | 2002-08-02 | 2004-02-12 | Bayerische Motoren Werke Ag | Schwenkhebel für einen hubvariablen Ventiltrieb |
EP1426569A1 (de) * | 2002-11-23 | 2004-06-09 | Mechadyne plc | Brennkraftmaschine mit variablem Ventiltrieb |
US7299774B2 (en) | 2003-01-30 | 2007-11-27 | Mahle Ventiltrieb Gmbh | Valve control |
EP1847691A2 (de) * | 2006-04-21 | 2007-10-24 | Schaeffler KG | Rollenelement für ein schwenkbewegliches Maschinenteil |
DE102006018512A1 (de) * | 2006-04-21 | 2007-10-25 | Schaeffler Kg | Rollenelement für ein schwenkbewegliches Maschinenteil |
EP1847691A3 (de) * | 2006-04-21 | 2009-04-08 | Schaeffler KG | Rollenelement für ein schwenkbewegliches Maschinenteil |
DE102009041963A1 (de) * | 2009-09-17 | 2011-04-21 | Mahle International Gmbh | Stellvorrichtung und Kopplungseinrichtung |
WO2015020678A1 (en) * | 2013-08-09 | 2015-02-12 | Diggs Matthew B | Helical torsion valve spring assembly |
DE102014003466A1 (de) * | 2014-03-11 | 2015-09-17 | Meta Motoren- Und Energie-Technik Gmbh | Vorrichtung und Verfahren zur variablen Steuerung eines Ventils einer Brennkraftmaschine |
Also Published As
Publication number | Publication date |
---|---|
DE59900189D1 (de) | 2001-09-13 |
EP1022443B1 (de) | 2001-08-08 |
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