DE102018112811A1 - Variable valve train of a reciprocating internal combustion engine - Google Patents
Variable valve train of a reciprocating internal combustion engine Download PDFInfo
- Publication number
- DE102018112811A1 DE102018112811A1 DE102018112811.8A DE102018112811A DE102018112811A1 DE 102018112811 A1 DE102018112811 A1 DE 102018112811A1 DE 102018112811 A DE102018112811 A DE 102018112811A DE 102018112811 A1 DE102018112811 A1 DE 102018112811A1
- Authority
- DE
- Germany
- Prior art keywords
- transmission lever
- switching
- switching strip
- cam
- lever
- 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.)
- Withdrawn
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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
- F01L13/0005—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
- F01L13/0036—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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0476—Camshaft bearings
-
- 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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L2001/186—Split rocking arms, e.g. rocker arms having two articulated parts and means for varying the relative position of these parts or for selectively connecting the parts to move in unison
-
- 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
- F01L2013/10—Auxiliary actuators for variable valve timing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Vorgeschlagen ist ein variabler Ventiltrieb einer Hubkolbenbrennkraftmaschine, mit mindestens einem Gaswechselventil pro Zylinder, dessen Ventilhub jeweils durch mindestens einen Nocken einer Nockenwelle (1) vorgegeben und mittels eines schaltbaren Schlepphebels (6) durch eine Axialverschiebung eines in einer Querbohrung des Schlepphebels (6) geführten und aus einer Seitenwand desselben vorstehenden Schaltbolzens (5) selektiv abschaltbar oder auf einen anderen Hubverlauf umschaltbar ist, wobei die Schaltbolzen (5) der Schlepphebel (6) über Verbindungselemente (4) mit zumindest einer Schaltleiste (3) verbunden sind, welche parallel zur Nockenwelle (1) angeordnet sowie mittels zumindest eines Linearaktuators (10) gegen die Kraft eines Federelements (13) aus einer Ruhestellung in eine Schaltstellung längs verschiebbar ist, wobei der Linearaktuator (10) quer zu einer Schaltleiste (3) maschinenfest angeordnet ist und mittels eines Stößels (9) mit einem Übertragungshebel (8) in Wirkverbindung steht und wobei der Übertragungshebel (8) maschinenfest gelagert ist und mit der Schaltleiste (3) mittels einer Bahnfläche am Übertragungshebel (8) und/oder an der Schaltleiste (3) in Wirkverbindung steht, deren Abstand eder Schwenkbewegung des Übertragungshebels (8) um sein Lager variabel ausgeführt ist.Proposed is a variable valve train of a reciprocating internal combustion engine, with at least one cam valve per cylinder, the valve lift each predetermined by at least one cam of a camshaft (1) and by means of a switchable cam follower (6) by an axial displacement of a guided in a transverse bore of the cam lever (6) and from a side wall of the same projecting switching pin (5) selectively switched off or to another Hubverlauf is switchable, wherein the switching pin (5) of the drag lever (6) via connecting elements (4) with at least one switching strip (3) are connected, which parallel to the camshaft ( 1) and by means of at least one linear actuator (10) against the force of a spring element (13) from a rest position into a switching position is longitudinally displaceable, wherein the linear actuator (10) transversely to a switching strip (3) is arranged fixed to the machine and by means of a plunger ( 9) with a transmission lever (8) in Wirkver is binding and wherein the transmission lever (8) is mounted fixed to the machine and with the switching strip (3) by means of a web surface on the transmission lever (8) and / or on the switching strip (3) is in operative connection whose distance eder pivotal movement of the transmission lever (8) to his bearing is made variable.
Description
Die Erfindung bezieht sich auf einen variablen Ventiltrieb einer Hubkolbenbrennkraftmaschine, mit mindestens einem Gaswechselventil pro Zylinder, dessen Ventilhub jeweils durch mindestens einen Nocken einer Nockenwelle vorgegeben und mittels eines schaltbaren Schlepphebels durch eine Axialverschiebung eines in einer Querbohrung des Schlepphebels geführten und aus einer Seitenwand desselben vorstehenden Schaltbolzens selektiv abschaltbar oder auf einen anderen Hubverlauf umschaltbar ist, wobei die Schaltbolzen der Schlepphebel über Verbindungselemente mit zumindest einer Schaltleiste verbunden sind, welche parallel zur Nockenwelle angeordnet sowie mittels zumindest eines Linearaktuators gegen die Kraft eines Federelements aus einer Ruhestellung in eine Schaltstellung längs verschiebbar ist.The invention relates to a variable valve train of a reciprocating internal combustion engine, with at least one gas exchange valve per cylinder whose given valve lift by at least one cam of a camshaft and by means of a switchable cam follower by an axial displacement of a guided in a transverse bore of the cam follower and from a side wall of the same above switching pin selectively switched off or switchable to another Hubverlauf, the switching pin of the cam followers are connected via connecting elements with at least one switching strip which is arranged parallel to the camshaft and longitudinally displaceable by means of at least one linear actuator against the force of a spring element from a rest position to a switching position.
Eine derartige Anordnung eines variablen Ventiltriebes ist in der noch nicht veröffentlichten Patentanmeldung
Aufgabe der Erfindung ist es, diese Nachteile zu beheben und eine Wirkverbindung zwischen Längsaktuator und Schaltleiste zur Verfügung zu stellen, die einen andersartigen Anbau des Linearaktuators an dem Zylinderkopf der Brennkraftmaschine ermöglicht.The object of the invention is to remedy these disadvantages and to provide an operative connection between the longitudinal actuator and the safety edge, which allows a different type of attachment of the linear actuator to the cylinder head of the internal combustion engine.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass der Linearaktuator quer zu einer Schaltleiste maschinenfest angeordnet ist und einen Stößel aufweist, der mit einem Übertragungshebel in Wirkverbindung steht, dass der Übertragungshebel maschinenfest gelagert ist und mit der Schaltleiste mittels einer Bahnfläche am Übertragungshebel und/oder an der Schaltleiste in Verbindung steht, deren Radialabstand in Abhängigkeit der Schwenkbewegung des Übertragungshebels um sein Lager variabel ausgebildet ist. Durch diese Ausgestaltung bewirkt der Übertragungshebel aufgrund der durch den Stößel des Linearaktuators hervorgerufenen Verschwenkung eine Verschiebung der Schaltleiste, die nach Stromlosschalten des Linearaktuators durch das Federelement zurück bewegt wird.
In vorteilhafter Weise ist der Übertragungshebel im Wesentlichen L-förmig ausgebildet und weist an seinem freien Ende einen Kontaktkopf auf, der vorzugsweise in Richtung zum Schwenklager abgewinkelt ist und in eine Aussparung in der Schaltleiste ragt. Dadurch kann der Übertragungshebel mit dem Rand der Schaltleiste zusammenwirken und eine Längsbewegung der Schaltleiste bewirken. Um diese Reibbewegung zu erleichtern, weist die Schaltleiste eine Kontaktfläche auf, die quer zur Längsachse der Schaltleiste ausgerichtet ist, so dass der Schaltkopf sich entlang der Kontaktfläche verschieben kann.According to the invention, the object is achieved in that the linear actuator is arranged fixed to the machine edge fixed to a safety edge and having a plunger, which is in operative connection with a transmission lever, that the transmission lever is mounted fixed to the machine and with the safety edge by means of a web surface on the transmission lever and / or on the Safety bar is in communication, the radial distance is formed variable depending on the pivotal movement of the transmission lever to its bearing. Due to this configuration, the transmission lever causes due to the caused by the plunger of the linear actuator pivoting a shift of the switching strip, which is moved back after Stromlosschalt the linear actuator by the spring element.
Advantageously, the transmission lever is substantially L-shaped and has at its free end a contact head, which is preferably angled in the direction of the pivot bearing and projects into a recess in the switching strip. As a result, the transmission lever can interact with the edge of the switching strip and cause a longitudinal movement of the switching strip. In order to facilitate this rubbing movement, the switching strip has a contact surface which is aligned transversely to the longitudinal axis of the switching strip, so that the switching head can move along the contact surface.
Die Erfindung ist in den Zeichnungen beschrieben:
- •
1 zeigt eine perspektivische Ansicht eines Teils eines Zylinderkopfes mit Linearaktuator, Übertragungshebel und Schaltleiste und - •
2 zeigt eine vereinfachte Seitenansicht der Bauteile gemäß1 .
- •
1 shows a perspective view of a portion of a cylinder head with linear actuator, transmission lever and safety edge and - •
2 shows a simplified side view of the components according to1 ,
In den
Wie insbesondere
In particular
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 1)1)
- Nockenwellecamshaft
- 2)2)
- Lagerbockbearing block
- 3)3)
- SchaltleisteSafety Edge
- 4)4)
- Verbindungselementefasteners
- 5) 5)
- Schaltbolzenswitching pin
- 6)6)
- Schlepphebelcam follower
- 7)7)
- Stützblechgusset
- 8)8th)
- Übertragungshebeltransmission lever
- 9)9)
- Stößeltappet
- 10)10)
- Linearaktuatorlinear actuator
- 11)11)
- Kontaktkopfcontact head
- 12)12)
- Kontaktflächecontact area
- 13)13)
- Federelementspring element
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102017101 [0002]DE 102017101 [0002]
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018112811.8A DE102018112811A1 (en) | 2018-05-29 | 2018-05-29 | Variable valve train of a reciprocating internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018112811.8A DE102018112811A1 (en) | 2018-05-29 | 2018-05-29 | Variable valve train of a reciprocating internal combustion engine |
Publications (1)
Publication Number | Publication Date |
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DE102018112811A1 true DE102018112811A1 (en) | 2019-12-05 |
Family
ID=68575990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102018112811.8A Withdrawn DE102018112811A1 (en) | 2018-05-29 | 2018-05-29 | Variable valve train of a reciprocating internal combustion engine |
Country Status (1)
Country | Link |
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DE (1) | DE102018112811A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11193396B2 (en) | 2018-07-03 | 2021-12-07 | Schaeffler Technologies AG & Co. KG | Module for a variable-stroke valve drive of an internal combustion engine |
US11274576B2 (en) | 2018-09-18 | 2022-03-15 | Schaeffler Technologies AG & Co. KG | Module for a variable-lift valve train of an internal combustion engine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017101792A1 (en) | 2017-01-31 | 2018-08-02 | Schaeffler Technologies AG & Co. KG | Variable valve train of a combustion piston engine |
-
2018
- 2018-05-29 DE DE102018112811.8A patent/DE102018112811A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017101792A1 (en) | 2017-01-31 | 2018-08-02 | Schaeffler Technologies AG & Co. KG | Variable valve train of a combustion piston engine |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11193396B2 (en) | 2018-07-03 | 2021-12-07 | Schaeffler Technologies AG & Co. KG | Module for a variable-stroke valve drive of an internal combustion engine |
US11274576B2 (en) | 2018-09-18 | 2022-03-15 | Schaeffler Technologies AG & Co. KG | Module for a variable-lift valve train of an internal combustion engine |
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Legal Events
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |