DE102006029156A1 - Valve drive play minimizing device for internal-combustion engine, has transmission unit with operable lever parts coupled with each other, where lever parts are designed in partial plastic deformable manner - Google Patents
Valve drive play minimizing device for internal-combustion engine, has transmission unit with operable lever parts coupled with each other, where lever parts are designed in partial plastic deformable manner Download PDFInfo
- Publication number
- DE102006029156A1 DE102006029156A1 DE102006029156A DE102006029156A DE102006029156A1 DE 102006029156 A1 DE102006029156 A1 DE 102006029156A1 DE 102006029156 A DE102006029156 A DE 102006029156A DE 102006029156 A DE102006029156 A DE 102006029156A DE 102006029156 A1 DE102006029156 A1 DE 102006029156A1
- Authority
- DE
- Germany
- Prior art keywords
- combustion engine
- internal combustion
- cam
- elements
- 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- Withdrawn
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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
-
- 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
- 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
- F01L2305/00—Valve arrangements comprising rollers
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
Die Erfindung betrifft eine Vorrichtung zur Minimierung von Spiel in einem Ventiltrieb einer Brennkraftmaschine nach dem Oberbegriff des Anspruchs 1 und einem Verfahren hierzu nach dem Oberbegriff des Anspruchs 4.The The invention relates to a device for minimizing game in a valve train of an internal combustion engine according to the preamble of claim 1 and a method for this according to the preamble of Claim 4.
Üblicherweise führen Toleranzen an schaltbaren Schlepphebeln für Gaswechselventiltriebe von Brennkraftmaschinen zylinderspezifisch zu sehr unterschiedlichen Ventilerhebungen. Daraus folgen extreme Unterschiede in den Zylinderfüllungen der Brennkraftmaschinen mit den daraus resultierenden negativen Folgen für Leistungsentfaltung, Abgas und Laufruhe. Bei zweiteiligen Schaltschlepphebeln, die aus einem schaltbaren Hebelteil und einem, mit dem schaltbaren Hebelteil koppelbaren, weiteren Hebelteil bestehen, welche von einem Nocken der Brennkraftmaschine beaufschlagbar sind, werden diese Toleranzen in der Regel durch Spiel zwischen Grundkreis des Nockens und schaltbarem Hebelteil aufgefangen. Das Spiel erfordert jedoch lange Rampen an den zugehörigen Nocken, was zu einem verzögerten öffnen bzw. zu einem verzögerten Schließen der Gaswechselventile der Brennkraftmaschine führt. Je nach Toleranzen, d.h. großes bzw. kleines Spiel, kommt es zu einer stark unterschiedlichen Öffnungsdauer der Ventile und demgemäß auch zu einer stark unterschiedlichen Füllung der Zylinder.Usually to lead Tolerances on switchable drag levers for gas exchange valve trains of internal combustion engines Cylinder-specific to very different valve lifts. from that follow extreme differences in the cylinder fillings of internal combustion engines with the resulting negative consequences for power delivery, exhaust and smoothness. For two-part Schaltschlepphebeln, consisting of a switchable lever part and a, with the switchable lever part coupled, consist of another lever part, which of a cam of the internal combustion engine be acted upon, these tolerances are usually by Play between base circle of the cam and switchable lever part caught. However, the game requires long ramps on the associated cams, what about a delayed open or to a delayed Shut down the gas exchange valves of the internal combustion engine leads. Depending on the tolerances, i. great or small game, it comes to a very different opening duration the valves and therefore also too a very different filling the cylinder.
Aus
der
Zum
allgemeinen technischen Hintergrund wird noch auf die
Es ist die Aufgabe der Erfindung, eine Vorrichtung zur Minimierung von Spiel in einem Ventiltrieb einer Brennkraftmaschine sowie einem Verfahren hierzu zu schaffen, bei der bei einfachem und kostengünstigen Aufbau eine nahezu vollständige Eliminierung des Spiels ermöglicht wird.It The object of the invention is a device for minimizing of play in a valve train of an internal combustion engine and a To provide this process, in the case of simple and inexpensive Building an almost complete elimination of the game becomes.
Diese Aufgabe wird bei der Vorrichtung erfindungsgemäß durch die im Kennzeichen des Patentanspruchs 1 gegebenen Merkmale und beim Verfahren erfindungsgemäß durch die im Kennzeichen des Patentanspruchs 4 gegebenen Merkmale gelöst.These Task is in the device according to the invention by the in the plate of the claim 1 given characteristics and the method according to the invention by solved given in the characterizing part of claim 4 features.
Ein wesentlicher Vorteil der Erfindung liegt in der nahezu vollständigen Eliminierung des Spiels im Ventiltrieb einer Brennkraftmaschine. Dies geschieht durch einfache plastische Verformung des schaltbaren Hebelteils, wodurch sämtliche Toleranzen zwischen den Hebelteilen ausgeglichen werden. Infolge dieser Verformung liegt nun ein ganz bestimmter vorbestimmter Abstand zwischen dem Grundkreis eines dem schaltbaren Hebelteil zugeordneten, maßgenauen Nockenprofils und den Nockenfolgern des schaltbaren Hebelteils vor.One An essential advantage of the invention lies in the almost complete elimination of the game in the valve train of an internal combustion engine. This happens through simple plastic deformation of the switchable lever part, whereby all Tolerances between the lever parts are compensated. As a result of this Deformation is now a very specific predetermined distance between the base circle of the switchable lever part associated, dimensionally accurate Cam profiles and the cam followers of the switchable lever part.
Vorteilhafterweise ist keine Klassifizierung der Hebelteile erforderlich, wodurch deutlich geringere Bauteil- und Montagekosten anfallen. Die Bauteile sind so gestaltet, dass ohne Klassifizierung immer ein negatives Spiel entsteht, welches dann erfindungsgemäß durch die plastische Verformung des schaltbaren Hebelteils beseitigt wird. Das verbleibende Restspiel ist somit auf ein Minimum reduziert.advantageously, No classification of the lever parts is required, which makes it clear lower component and assembly costs incurred. The components are designed so that without classification always a negative game arises, which then according to the invention by the plastic deformation the switchable lever part is eliminated. The remaining rest game is thus reduced to a minimum.
Vorteilhafterweise kann der eingestellte Zustand konserviert werden, indem die verformte Ausnehmung durch eine Schweißung versteift wird.advantageously, the set state can be conserved by the deformed Recess by a weld is stiffened.
Vorteilhafterweise wird das prinzipbedingte Minimalspiel, welches eine Überbestimmung vermeidet, durch entsprechend gestaltete Nockenwellengrundkreise dargestellt und kann aufgrund der hohen Fertigungsgenauigkeit derselben sehr klein gehalten werden, ohne dass zusätzliche Kosten entstehen.advantageously, is the principle-based minimal game, which is an over-determination avoids, by appropriately designed camshaft base circles shown and can due to the high manufacturing accuracy of the same be kept very small, without incurring additional costs.
Im Folgenden wird ein Ausführungsbeispiel der Erfindung anhand von 4 Figuren näher erläutert. Die Figuren, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination, die der Fachmann zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen wird.in the Below is an embodiment of the Invention with reference to 4 figures closer explained. The Figures, the description and the claims contain numerous features in combination, which the skilled person expediently consider individually and sum up to meaningful further combinations.
Dabei zeigen:there demonstrate:
Gleiche Bauteile in den Figuren sind mit gleichen Bezugszeichen gekennzeichnet.Same Components in the figures are identified by the same reference numerals.
In den Figuren sind gleiche oder im Wesentlichen gleich wirkende Elemente mit den gleichen Bezugszeichen beziffert.In The figures are the same or substantially the same elements numbered with the same reference numerals.
Gemäß
Der
Schlepphebel
Die
Arme
Um
das Gaswechselventil
Durch
fertigungsbedingte Toleranzen an der Nockenwelle, den Hebelteilen
Um
eine Vorrichtung zur Minimierung von Spiel im Ventiltrieb der Brennkraftmaschine
und ein Verfahren zu schaffen, bei der bei einfachem und kostengünstigen
Aufbau eine nahezu vollständige Minimierung
des Spiels ermöglicht
wird, ist erfindungsgemäß vorgesehen,
dass das schaltbare Hebelteil
Die
Beseitigung des vorgehaltenen negativen Spiels a' erfolgt durch Drücken einer Vorrichtung
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006029156A DE102006029156A1 (en) | 2006-06-24 | 2006-06-24 | Valve drive play minimizing device for internal-combustion engine, has transmission unit with operable lever parts coupled with each other, where lever parts are designed in partial plastic deformable manner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006029156A DE102006029156A1 (en) | 2006-06-24 | 2006-06-24 | Valve drive play minimizing device for internal-combustion engine, has transmission unit with operable lever parts coupled with each other, where lever parts are designed in partial plastic deformable manner |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102006029156A1 true DE102006029156A1 (en) | 2007-12-27 |
Family
ID=38721198
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102006029156A Withdrawn DE102006029156A1 (en) | 2006-06-24 | 2006-06-24 | Valve drive play minimizing device for internal-combustion engine, has transmission unit with operable lever parts coupled with each other, where lever parts are designed in partial plastic deformable manner |
Country Status (1)
Country | Link |
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DE (1) | DE102006029156A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE860573C (en) * | 1947-11-10 | 1952-12-22 | Porsche Konstruktionen G M B H | Adjustment device for valve controls of internal combustion engines |
DE862971C (en) * | 1948-03-13 | 1953-01-15 | Porsche Konstruktionen G M B H | Adjustment device for valve controls of internal combustion engines |
DE4213855A1 (en) * | 1992-04-27 | 1993-10-28 | Iav Motor Gmbh Ingenieurgesell | Valve drive for intake valves of IC engine - has hydraulic tolerance compensation device between stroke transmission element and valve |
US20020088418A1 (en) * | 2001-01-05 | 2002-07-11 | Pierik Ronald J. | Mechanical lash control apparatus for an engine cam |
US20030010305A1 (en) * | 2001-06-15 | 2003-01-16 | Eaton Corporation | Valve train assembly |
DE10210747A1 (en) * | 2002-03-12 | 2003-10-02 | Ina Schaeffler Kg | Method for producing switchable valve drive elements of an internal combustion engine |
-
2006
- 2006-06-24 DE DE102006029156A patent/DE102006029156A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE860573C (en) * | 1947-11-10 | 1952-12-22 | Porsche Konstruktionen G M B H | Adjustment device for valve controls of internal combustion engines |
DE862971C (en) * | 1948-03-13 | 1953-01-15 | Porsche Konstruktionen G M B H | Adjustment device for valve controls of internal combustion engines |
DE4213855A1 (en) * | 1992-04-27 | 1993-10-28 | Iav Motor Gmbh Ingenieurgesell | Valve drive for intake valves of IC engine - has hydraulic tolerance compensation device between stroke transmission element and valve |
US20020088418A1 (en) * | 2001-01-05 | 2002-07-11 | Pierik Ronald J. | Mechanical lash control apparatus for an engine cam |
US20030010305A1 (en) * | 2001-06-15 | 2003-01-16 | Eaton Corporation | Valve train assembly |
DE10210747A1 (en) * | 2002-03-12 | 2003-10-02 | Ina Schaeffler Kg | Method for producing switchable valve drive elements of an internal combustion engine |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: DAIMLER AG, 70327 STUTTGART, DE |
|
8120 | Willingness to grant licences paragraph 23 | ||
R120 | Application withdrawn or ip right abandoned |
Effective date: 20120828 |