DE102008026194A1 - Switchable supporting device for valve gear of internal combustion engine, has hydraulic line provided to feed hydraulic medium to locking element for combining admission with spring element - Google Patents
Switchable supporting device for valve gear of internal combustion engine, has hydraulic line provided to feed hydraulic medium to locking element for combining admission with spring element Download PDFInfo
- Publication number
- DE102008026194A1 DE102008026194A1 DE200810026194 DE102008026194A DE102008026194A1 DE 102008026194 A1 DE102008026194 A1 DE 102008026194A1 DE 200810026194 DE200810026194 DE 200810026194 DE 102008026194 A DE102008026194 A DE 102008026194A DE 102008026194 A1 DE102008026194 A1 DE 102008026194A1
- Authority
- DE
- Germany
- Prior art keywords
- locking element
- supporting device
- hydraulic medium
- inner part
- hydraulic
- 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- Withdrawn
Links
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
- F01L13/0031—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 tappet or pushrod length
-
- 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
- F01L1/14—Tappets; Push rods
- F01L1/143—Tappets; Push rods for use with overhead camshafts
-
- 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
- F01L1/185—Overhead end-pivot rocking arms
-
- 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
-
- 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
Abstract
Description
Die Erfindung betrifft eine schaltbare Abstützvorrichtung der im Oberbegriff des Patentanspruchs 1 angegebenen Art sowie ein Verfahren zum Schalten einer derartigen Abstützvorrichtung.The The invention relates to a switchable supporting device of in the preamble of claim 1 specified type and a method for switching such a supporting device.
Eine
derartige schaltbare Abstützvorrichtung, welche zum automatischen
Ausgleich eines Ventilspiels eines Ventiltriebs von Brennkraftmaschinen
dient, ist beispielsweise bereits aus der
Aufgabe der vorliegenden Erfindung ist es, eine schaltbare Abstützvorrichtung sowie ein entsprechendes Verfahren zu schaffen, welche zum Schalten der Abstützvorrichtung die Verwendung einer verringerten Pumpenleistung einer das Hydraulikmedium fördernden Hydraulikmedium-Pumpe ermöglichen.task The present invention is a switchable supporting device and to provide a corresponding method, which for switching the support device, the use of a reduced Pump capacity of the hydraulic medium pumping hydraulic medium pump enable.
Die Aufgabe wird erfindungsgemäß durch eine schaltbare Abstützvorrichtung mit den Merkmalen des Patentanspruchs 1 sowie durch ein Verfahren zum Schalten einer derartigen Abstützvorrichtung gemäß Patentanspruch 5 gelöst. Vorteilhafte Ausgestaltungen mit zweckmäßigen und nichttrivialen Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben, wobei vorteilhafte Ausgestaltungen der Abstützvorrichtung – soweit anwendbar – als vorteilhafte Ausgestaltungen des Verfahrens anzusehen sind.The The object is achieved by a switchable Support device with the features of the claim 1 and by a method for switching such a support device according to claim 5 solved. Advantageous embodiments with appropriate and non-trivial developments of the invention are in the subclaims indicated, wherein advantageous embodiments of the support device - so far applicable - as advantageous embodiments of the method to be considered.
Eine schaltbare Abstützvorrichtung, welche zum Schalten der Abstützvorrichtung die Verwendung einer verringerten Pumpenleistung einer das Hydraulikmedium fördernden Hydraulikmedium-Pumpe ermöglicht, ist erfindungsgemäß dadurch geschaffen, dass eine Hydraulikleitung vorgesehen ist, mittels welcher dem Verriegelungselement Hydraulikmedium zur gemeinsamen Beaufschlagung mit dem Federelement zuzuleiten ist. Durch die Möglichkeit, das Verriegelungselement wahlweise durch hydraulische Beaufschlagung entgegen der Federkraftrichtung des Federelements in die Freigabestellung oder durch hydraulische Beaufschlagung in Federkraftrichtung in die Sperrstellung zu bewegen, kann das Federelement entsprechend schwächer ausgelegt sein, wodurch der zum Schalten erforderliche Hydraulikmedium-Druck vorteilhaft gesenkt werden kann. Das Federelement muss das Verriegelungselement mit anderen Worten nicht mehr allein bewegen, sondern kann als reine ”Haltefeder” ausgelegt sein. Dies hat den weiteren Vorteil, dass die Abstützvorrichtung bei abgeschalteter Brennkraftmaschine dennoch in einen definierten, gesperrten Zustand geschaltet wird. Weiterhin werden bisher im Stand der Technik durch schwankende Hydraulikmedium-Drücke – beispielsweise beim Aktivieren eines Nockenwellenverstellers – verursachte Fehlschaltungen der Abstützvorrichtung zuverlässig vermieden. Aufgrund der geringeren Pumpenleistung, die zum Bewegen des Verriegelungselements zwischen der Freigabe- und der Sperrstellung benötigt wird, ergeben sich darüber hinaus entsprechende Verbrauchseinsparungen der Brennkraftmaschine. Insbesondere lässt sich der Bereich, in dem geschaltet werden kann, deutlich zu niedrigeren (sonst nur mit einer größeren oder einer zusätzlichen Hydraulikpumpe erreichbaren) Drehzahlen hin erweitern und damit das CO2-Einsparpotential erhöhen.A switchable supporting device, which is used to switch the Support device the use of a reduced pump capacity a hydraulic medium pump conveying the hydraulic medium allows is inventively created by that a hydraulic line is provided, by means of which the locking element Hydraulic medium for joint application with the spring element is to be forwarded. By the possibility of the locking element optionally by hydraulic pressure against the spring force direction of the spring element in the release position or by hydraulic Loading in the spring force direction to move to the locked position, can the spring element be designed to be correspondingly weaker, whereby the required for switching hydraulic medium pressure advantageous can be lowered. The spring element must be the locking element in other words, no longer move alone, but can be designed as a pure "retaining spring" be. This has the further advantage that the supporting device with the internal combustion engine still switched off into a defined, locked state is switched. Furthermore, so far in the state the technology by fluctuating hydraulic medium pressures - for example when activating a camshaft adjuster - caused Faulty circuits of the supporting device reliable avoided. Due to the lower pumping power needed to move of the locking element between the release and the locked position is required, in addition, corresponding Consumption savings of the internal combustion engine. In particular, lets the range in which can be switched, significantly lower (otherwise only with a larger or an additional one Hydraulic pump achievable) speeds up and thus increase the CO2-saving potential.
Ein weiterer Aspekt der Erfindung betrifft ein Verfahren zum Schalten einer Abstützvorrichtung nach einem der vorhergehenden Ausführungsbeispiele, bei welchem das Verriegelungselement entweder mit Hydraulikmedium beaufschlagt und relativ zum Außenteil in die die Bewegung des Innenteils freigebenden Freigabestellung bewegt wird oder gemeinsam mit durch die Hydraulikleitung geleitetem Hydraulikmedium und dem zugeordneten Federelement beaufschlagt und in die die Bewegung des Innenteils zumindest in eine Bewegungsrichtung verunmöglichende Sperrstellung bewegt wird. Auf diese Weise kann zum Schalten der Abstützvorrichtung eine verringerte Pumpenleistung einer das Hydraulikmedium fördernden Hydraulikmedium-Pumpe verwendet werden, da das Federelement durch die Unterstützung des Hydraulikmediums entsprechend schwächer ausgelegt werden kann. Hierdurch wird sowohl beim Bewegen des Verriegelungselements in die Freigabe- als auch in die Sperrstellung ein entsprechend geringer Hydraulikmedium-Druck benötigt. Die weiteren, sich hieraus ergebenden Vorteile sind bereits den vorhergehenden Beschreibungen zu entnehmen.Another aspect of the invention relates to a method for switching a supporting device according to one of the preceding embodiments, wherein the locking element is acted upon either with hydraulic medium and relative to the outer part in the movement of the inner part releasing release position is moved or acted upon together with hydraulic fluid passed through the hydraulic line and the associated spring element and in which the movement of the inner part at least in a direction of movement impeding blocking position is moved. In this way, can be used for switching the support device, a reduced pumping capacity of the hydraulic medium promoting hydraulic medium pump, since the spring element can be designed correspondingly weaker by the support of the hydraulic medium. As a result, a correspondingly lower hydraulic medium pressure is required both when moving the locking element in the release and in the blocking position. The other, resulting advantages are already apparent from the previous descriptions.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich anhand der nachfolgenden Beschreibung eines Ausführungsbeispiels sowie anhand der Zeichnungen, in welchen gleiche oder funktionsgleiche Elemente mit identischen Bezugszeichen versehen sind. Dabei zeigt die einzige Figur in schematischer seitlicher Schnittansicht ein Ausführungsbeispiel einer schaltbaren Abstützvorrichtung für einen Ventiltrieb einer Brennkraftmaschine.Further Advantages, features and details of the invention will be apparent from the following description of an embodiment and with reference to the drawings in which the same or the same function Elements are provided with identical reference numerals. It shows the single figure in a schematic side sectional view Embodiment of a switchable supporting device for a valve train of an internal combustion engine.
Die
einzige Figur zeigt in schematischer seitlicher Schnittansicht ein
Ausführungsbeispiel einer schaltbaren Abstützvorrichtung
für einen Ventiltrieb (nicht gezeigt) einer ausschnittsweise
abgebildeten Brennkraftmaschine
Bei
in die Freigabestellung bewegtem Verriegelungselement
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES 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 The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 102005027526 A1 [0002] DE 102005027526 A1 [0002]
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810026194 DE102008026194A1 (en) | 2008-05-30 | 2008-05-30 | Switchable supporting device for valve gear of internal combustion engine, has hydraulic line provided to feed hydraulic medium to locking element for combining admission with spring element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810026194 DE102008026194A1 (en) | 2008-05-30 | 2008-05-30 | Switchable supporting device for valve gear of internal combustion engine, has hydraulic line provided to feed hydraulic medium to locking element for combining admission with spring element |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008026194A1 true DE102008026194A1 (en) | 2009-12-03 |
Family
ID=41253976
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200810026194 Withdrawn DE102008026194A1 (en) | 2008-05-30 | 2008-05-30 | Switchable supporting device for valve gear of internal combustion engine, has hydraulic line provided to feed hydraulic medium to locking element for combining admission with spring element |
Country Status (1)
Country | Link |
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DE (1) | DE102008026194A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11378174B2 (en) | 2018-05-02 | 2022-07-05 | Faurecia Autositze Gmbh | Method for assembling a transmission component for a seat height adjustment |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005027526A1 (en) | 2004-07-01 | 2006-01-26 | Ina-Schaeffler Kg | Switchable cam follower |
-
2008
- 2008-05-30 DE DE200810026194 patent/DE102008026194A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005027526A1 (en) | 2004-07-01 | 2006-01-26 | Ina-Schaeffler Kg | Switchable cam follower |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11378174B2 (en) | 2018-05-02 | 2022-07-05 | Faurecia Autositze Gmbh | Method for assembling a transmission component for a seat height adjustment |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R005 | Application deemed withdrawn due to failure to request examination |