DE102011115533A1 - Camshaft for camshaft system for internal combustion engine, has carrier shaft and cam, where cam has two cam units, and one cam unit is designed in sliding manner and arranged axially along longitudinal axis of carrier shaft - Google Patents

Camshaft for camshaft system for internal combustion engine, has carrier shaft and cam, where cam has two cam units, and one cam unit is designed in sliding manner and arranged axially along longitudinal axis of carrier shaft Download PDF

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Publication number
DE102011115533A1
DE102011115533A1 DE201110115533 DE102011115533A DE102011115533A1 DE 102011115533 A1 DE102011115533 A1 DE 102011115533A1 DE 201110115533 DE201110115533 DE 201110115533 DE 102011115533 A DE102011115533 A DE 102011115533A DE 102011115533 A1 DE102011115533 A1 DE 102011115533A1
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cam
camshaft
carrier shaft
longitudinal axis
parts
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DE201110115533
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German (de)
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Severin Moosmann
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Neumayer Tekfor Holding GmbH
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Neumayer Tekfor Holding GmbH
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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
    • 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
    • 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
    • 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
    • F01L1/08—Shape of cams
    • 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
    • F01L13/0042—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 with cams being 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
    • F01L2001/0471—Assembled camshafts
    • F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
    • 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
    • F01L2013/0052—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 with cams provided on an axially slidable sleeve

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

The camshaft has a carrier shaft (1) and a cam (2). The cam has two cam units (3), where one cam unit is designed in a sliding manner and arranged axially along a longitudinal axis (4) of the carrier shaft. The cam units have a contour extended along the longitudinally axis. The two cam units are arranged to each other in a mirror-symmetrical manner. An independent claim is included for a camshaft system with a valve.

Description

Die Erfindung bezieht sich auf eine Nockenwelle für eine Brennkraftmaschine, mit mindestens einer Trägerwelle, und mit mindestens einem Nocken. Weiterhin bezieht sich die Erfindung auf ein Nockenwellensystem mit einer Nockenwelle und einem Nockenfolger.The invention relates to a camshaft for an internal combustion engine, with at least one carrier shaft, and with at least one cam. Furthermore, the invention relates to a camshaft system with a camshaft and a cam follower.

In Verbrennungsmotoren wird das Öffnungs- und Schließverhalten der Ventile durch die Nocken der Nockenwellen bestimmt. Dabei wirken die rotierenden Nocken über Nockenfolger – z. B. in Form von Kipp-, Schlepp- oder Schwinghebel – auf die Ventile ein. Um je nach Lastzustand den Motor steuern zu können, gibt es im Stand der Technik Verstellmöglichkeiten von Nockenwellen, welche z. B. unterschiedliche Nocken in Wirkeingriff mit den Ventilen bringen. Durch einzelne Nocken sind jedoch nur diskrete Änderungen möglich.In internal combustion engines, the opening and closing behavior of the valves is determined by the cam of the camshafts. The rotating cam act via cam follower - z. B. in the form of tilting, towing or rocker - on the valves. In order to control the engine depending on the load condition, there are in the prior art adjustment of camshafts, which z. B. bring different cams in operative engagement with the valves. Individual cams, however, only discreet changes are possible.

Der Erfindung liegt die Aufgabe zugrunde, eine kontinuierliche Veränderung der Steuerung durch eine Nockenwelle vorzuschlagen.The invention has for its object to propose a continuous change of control by a camshaft.

Die Aufgabe wird erfindungsgemäß bezüglich der Nockenwelle dadurch gelöst, dass der Nocken aus mindestens zwei Nockenteilen besteht, dass mindestens ein Nockenteil axial längs einer Längsachse der Trägerwelle verschiebbar ausgestaltet und angeordnet ist, und dass die zwei Nockenteile jeweils mindestens eine sich längs der Längsachse erstreckende Kontur aufweisen. Erfindungsgemäß besteht ein Nocken aus zumindest zwei Nockenteilen, von welchen zumindest ein Nockenteil axial längs der Längsachse der Trägerwelle verschiebbar ist. In einer Ausgestaltung sind insbesondere beide Nockenteile axial verschiebbar. Durch die Konturen der Nockenteile, welche sich zumindest längs der besagten Längsachse erstrecken, ergeben sich somit für die Ventilsteuerung unterschiedliche Profile.The object is achieved with respect to the camshaft in that the cam consists of at least two cam parts, that at least one cam member axially displaceable along a longitudinal axis of the carrier shaft configured and arranged, and that the two cam parts each have at least one along the longitudinal axis extending contour , According to the invention, a cam consists of at least two cam parts, of which at least one cam part is displaceable axially along the longitudinal axis of the carrier shaft. In one embodiment, in particular both cam parts are axially displaceable. Due to the contours of the cam parts which extend at least along the said longitudinal axis, different profiles thus result for the valve control.

Dies ist dadurch möglich, dass durch das axiale Verschieben unterschiedliche axiale Abschnitte der Nockenteile in Eingriff mit dem Ventil kommen. Durch die Ausgestaltung der Konturen lassen sich somit auch unterschiedliche Steuerungen der Ventile durch jeweils unterschiedliche Hubhöhen vorgeben. Durch den Verlauf der Konturen ergibt sich somit insbesondere auch eine stufenlose Variation des Ventilhubs, so dass eine optimale Steuerung des Motors möglich ist. Dabei sind die zwei Nockenteile in einer Variante insbesondere derartig ausgestaltet, dass ein dem von den beiden Nockenteilen gebildeter Nocken zugeordneter Nockenfolger zumeist mit beiden Nockenteilen in Eingriff ist. In einer Variante sind mehrere Nocken auf der Trägerwelle vorgesehen, welche zumindest teilweise oder alle aus jeweils zwei Nockenteilen gebildet sind. Ein Vorteil der Erfindung besteht insbesondere im einfachen Aufbau.This is possible because different axial sections of the cam parts come into engagement with the valve due to the axial displacement. As a result of the configuration of the contours, it is thus also possible to specify different controls of the valves by respectively different lifting heights. The course of the contours thus results in particular in a stepless variation of the valve lift, so that optimum control of the engine is possible. In this case, in one variant, the two cam parts are designed in particular in such a way that a cam follower associated with the cam formed by the two cam parts is usually in engagement with both cam parts. In a variant, a plurality of cams are provided on the carrier shaft, which are formed at least partially or all of two cam parts. An advantage of the invention is in particular the simple structure.

Eine Ausgestaltung der erfindungsgemäßen Nockenwelle sieht vor, dass die zwei Nockenteile spiegelsymmetrisch zueinander ausgestaltet sind. In einer Ausgestaltung sind insbesondere die zwei Nockenteile identisch ausgeführt, jedoch umgekehrt auf der Trägerwelle aufgebracht.An embodiment of the camshaft according to the invention provides that the two cam parts are designed mirror-symmetrically to each other. In one embodiment, in particular, the two cam parts are identical, but applied inversely to the carrier shaft.

Eine Ausgestaltung der erfindungsgemäßen Nockenwelle beinhaltet, dass die zwei Nockenteile jeweils zumindest teilweise mindestens eine konische Kontur aufweisen, wobei die Durchmesser der Konen sich längs der Längsachse der Trägerwelle in entgegengesetzte Richtungen verändern. In einer Variante verengen sich die Konen längs der Längsachse aufeinander zu.An embodiment of the camshaft according to the invention comprises that the two cam parts each have at least partially at least one conical contour, wherein the diameters of the cones change in opposite directions along the longitudinal axis of the carrier shaft. In one variant, the cones narrow towards one another along the longitudinal axis.

Eine Ausgestaltung der erfindungsgemäßen Nockenwelle sieht vor, dass sich zwischen den zwei Nockenteilen ein freier Abschnitt der Trägerwelle befindet. In dieser Ausgestaltung berühren sich die zwei Nockenwelle nicht, sondern zwischen ihnen befindet sich ein Stück der Trägerwelle. Diese Ausgestaltung kann somit damit einhergehen, dass in diesem Bereich ein der Nocke zugeordneter Nockenfolger Kontakt mit der Trägerwelle selbst hat.An embodiment of the camshaft according to the invention provides that there is a free section of the carrier shaft between the two cam parts. In this embodiment, the two camshaft do not touch, but between them is a piece of the carrier shaft. This embodiment can thus be accompanied by the fact that in this area a cam follower associated with the cam makes contact with the carrier shaft itself.

Eine Ausgestaltung der erfindungsgemäßen Nockenwelle beinhaltet, dass die zwei Nockenteile fest gegenüber radialen Verdrehungen auf der Trägerwelle fixiert sind. Die Nockenteile sind somit nur axial verschiebbar und ihre radiale Position, d. h. ihre Winkelstellung ist fest.An embodiment of the camshaft according to the invention includes that the two cam parts are firmly fixed to radial rotations on the carrier shaft. The cam parts are thus only axially displaceable and their radial position, d. H. their angular position is fixed.

Eine Ausgestaltung der erfindungsgemäßen Nockenwelle sieht vor, dass mindestens eine Verstelleinheit zum Verstellen mindestens eines Nockenteils vorgesehen ist.An embodiment of the camshaft according to the invention provides that at least one adjusting unit is provided for adjusting at least one cam part.

Weiterhin löst die Erfindung die Aufgabe mit einem Nockenwellensystem, welches mindestens eine Nockenwelle nach einer der obigen Ausgestaltungen und mindestens einen Nockenfolger aufweist. Dabei ist vorgesehen, dass der Nockenfolger zumindest teilweise eine Kontur aufweist, welche im Wesentlichen komplementär zu den Konturen der zwei Nockenteile ausgestaltet ist. Der Nockenfolger passt sich den Konturen der Nockenteile an und wird somit auch über beide Nockenteile betätigt. Der aus zwei Nockenteilen bestehende Nocken wirkt somit direkt auf den Nockenfolger. Es sind somit wenige Bauteile erforderlich.Furthermore, the invention solves the problem with a camshaft system having at least one camshaft according to one of the above embodiments and at least one cam follower. It is provided that the cam follower has at least partially a contour which is configured substantially complementary to the contours of the two cam parts. The cam follower adapts to the contours of the cam parts and is therefore also operated via both cam parts. The cam consisting of two cam parts thus acts directly on the cam follower. There are thus few components required.

Eine Ausgestaltung des erfindungsgemäßen Nockenwellensystems beinhaltet, dass der Nockenfolger im Wesentlichen tonnenförmig ausgestaltet ist. Die Tonnenform passt insbesondere zu den teilweise konisch ausgestalteten Nockenteilen.An embodiment of the camshaft system according to the invention includes that the cam follower is designed substantially barrel-shaped. The barrel shape is particularly suitable for the partially conical cam parts.

Eine Ausgestaltung des erfindungsgemäßen Nockenwellensystems sieht vor, dass der Nockenfolger mindestens einem Ventil zugeordnet ist.An embodiment of the camshaft system according to the invention provides that the cam follower is associated with at least one valve.

Eine Ausgestaltung des erfindungsgemäßen Nockenwellensystems beinhaltet, dass der Nockenfolger mindestens zwei Ventilen zugeordnet ist.An embodiment of the camshaft system according to the invention includes that the cam follower is associated with at least two valves.

Die Erfindung wird anhand der Figuren näher erläutert. Dabei zeigen:The invention will be explained in more detail with reference to FIGS. Showing:

1: eine Draufsicht auf einen Teil einer erfindungsgemäßen Nockenwelle und, 1 FIG. 2 is a plan view of a part of a camshaft according to the invention and FIG.

2: eine Draufsicht auf einen Teil eines erfindungsgemäßen Nockenwellensystems. 2 : A plan view of a part of a camshaft system according to the invention.

Die 1 zeigt einen Teil einer erfindungsgemäßen Nockenwelle, bei welcher ein Nocken 2 durch zwei Nockenteile 3 gebildet wird. Die Nockenteile 3 sind dabei axial längs der Längsachse 4 der Trägerwelle 1 verschiebbar. Gegenüber einem Verdrehen sind die Nockenteile 3 jedoch fixiert, z. B. über eine Verzahnung oder eine Keilwellenverbindung. Beide Nockenteile 3 sind spiegelsymmetrisch zueinander ausgestaltet und weisen in dieser Ausgestaltung jeweils eine teilweise konische Kontur auf, wobei die Konen sich jeweils voneinander fort verbreitern. Zwischen den Nockenteilen 3 befindet sich ein freier Bereich der Trägerwelle 1. In der gezeigten Variante weisen die Nockenteile 3 an ihrer Innenkante eine um ca. 30° geneigte Fläche auf. Die Bewegung der Nockenteile 3 erfolgt im gezeigten Beispiel symmetrisch zueinander bzw. symmetrisch zum Nockenfolger 6, welcher in der 2 dargestellt ist.The 1 shows a part of a camshaft according to the invention, in which a cam 2 through two cam parts 3 is formed. The cam parts 3 are axially along the longitudinal axis 4 the carrier wave 1 displaceable. Compared to a twisting are the cam parts 3 but fixed, z. B. via a toothing or a splined connection. Both cam parts 3 are designed mirror-symmetrically to each other and each have a partial conical contour in this embodiment, wherein the cones widen each other from each other. Between the cam parts 3 there is a free area of the carrier wave 1 , In the variant shown have the cam parts 3 at its inner edge on an inclined surface by about 30 °. The movement of the cam parts 3 takes place in the example shown symmetrically to each other or symmetrical to the cam follower 6 which is in the 2 is shown.

In der 2 ist ein Teil eines erfindungsgemäßen Nockenwellensystems mit der Nockenwelle der 1 dargestellt. Die zwei Nockenteile 3 sind hier mit einer Verstelleinheit 5 verbunden. Diese besteht aus zwei seitlich mit den Nockenteilen 3 gekoppelten Trägerelementen 5.1, die über eine Spindel 5.2 mit zwei gegenläufigen Gewinden bewegt werden. Der Nockenfolger 6 ist tonnenförmig und passend zu den konischen Konturen der Nockenteile 3 ausgestaltet. Der Nockenfolger 6 ist dabei in dieser Ausgestaltung mit zwei Ventilen 7 verbunden. In dem gezeigten Zustand läuft der Nockenfolger 6 auf der Trägerwelle 1, so dass dies dem Grundkreis entspricht. Werden die Nockenteile 3 näher aneinander herangeführt, so kommen deren Konturen in Eingriff mit dem Nockenfolger 6 und bestimmen das Schließverhalten der Ventile 7.In the 2 is a part of a camshaft system according to the invention with the camshaft of the 1 shown. The two cam parts 3 are here with an adjustment unit 5 connected. This consists of two laterally with the cam parts 3 coupled carrier elements 5.1 that has a spindle 5.2 be moved with two opposing threads. The cam follower 6 is barrel-shaped and fits the conical contours of the cam parts 3 designed. The cam follower 6 is in this embodiment with two valves 7 connected. In the state shown, the cam follower is running 6 on the carrier shaft 1 , so that this corresponds to the base circle. Be the cam parts 3 brought closer to each other, so their contours come into engagement with the cam follower 6 and determine the closing behavior of the valves 7 ,

Claims (10)

Nockenwelle für eine Brennkraftmaschine, mit mindestens einer Trägerwelle, und mit mindestens einem Nocken, dadurch gekennzeichnet, dass der Nocken aus mindestens zwei Nockenteilen besteht, dass mindestens ein Nockenteil axial längs einer Längsachse der Trägerwelle verschiebbar ausgestaltet und angeordnet ist, und dass die zwei Nockenteile jeweils mindestens eine sich längs der Längsachse erstreckende Kontur aufweisen.Camshaft for an internal combustion engine, with at least one carrier shaft, and with at least one cam, characterized in that the cam consists of at least two cam parts, that at least one cam member axially displaceable along a longitudinal axis of the carrier shaft configured and arranged, and that the two cam parts each have at least one along the longitudinal axis extending contour. Nockenwelle nach Anspruch 1, dadurch gekennzeichnet, dass die zwei Nockenteile spiegelsymmetrisch zueinander ausgestaltet sind.Camshaft according to claim 1, characterized in that the two cam parts are designed mirror-symmetrically to one another. Nockenwelle nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die zwei Nockenteile jeweils zumindest teilweise mindestens eine konische Kontur aufweisen, wobei die Durchmesser der Konen sich längs der Längsachse der Trägerwelle in entgegengesetzte Richtungen verändern.Camshaft according to claim 1 or 2, characterized, the two cam parts each have at least partially at least one conical contour, wherein the diameters of the cones change in opposite directions along the longitudinal axis of the carrier shaft. Nockenwelle nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass sich zwischen den zwei Nockenteilen ein freier Abschnitt der Trägerwelle befindet.Camshaft according to one of claims 1 to 3, characterized in that there is a free portion of the carrier shaft between the two cam parts. Nockenwelle nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die zwei Nockenteile fest gegenüber radialen Verdrehungen auf der Trägerwelle fixiert sind.Camshaft according to one of claims 1 to 4, characterized in that the two cam parts are fixedly fixed relative to radial rotations on the carrier shaft. Nockenwelle nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass mindestens eine Verstelleinheit zum Verstellen mindestens eines Nockenteils vorgesehen ist.Camshaft according to one of claims 1 to 5, characterized in that at least one adjusting unit is provided for adjusting at least one cam part. Nockenwellensystem, mit mindestens einer Nockenwelle nach einem der Ansprüche 1 bis 6, und mit mindestens einem Nockenfolger, wobei der Nockenfolger zumindest teilweise eine Kontur aufweist, welche im Wesentlichen komplementär zu den Konturen der zwei Nockenteile ist.Cam system, with at least one camshaft according to one of claims 1 to 6, and with at least one cam follower, wherein the cam follower at least partially has a contour which is substantially complementary to the contours of the two cam parts. Nockenwellensystem nach Anspruch 7, dadurch gekennzeichnet, dass der Nockenfolger im Wesentlichen tonnenförmig ausgestaltet ist.Camshaft system according to claim 7, characterized in that the cam follower is designed substantially barrel-shaped. Nockenwellensystem nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der Nockenfolger mindestens einem Ventil zugeordnet ist.Camshaft system according to claim 7 or 8, characterized in that the cam follower is associated with at least one valve. Nockenwellensystem nach Anspruch 9, dadurch gekennzeichnet, dass der Nockenfolger mindestens zwei Ventilen zugeordnet ist.Camshaft system according to claim 9, characterized in that the cam follower is associated with at least two valves.
DE201110115533 2011-10-08 2011-10-08 Camshaft for camshaft system for internal combustion engine, has carrier shaft and cam, where cam has two cam units, and one cam unit is designed in sliding manner and arranged axially along longitudinal axis of carrier shaft Withdrawn DE102011115533A1 (en)

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DE201110115533 DE102011115533A1 (en) 2011-10-08 2011-10-08 Camshaft for camshaft system for internal combustion engine, has carrier shaft and cam, where cam has two cam units, and one cam unit is designed in sliding manner and arranged axially along longitudinal axis of carrier shaft

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
US8863714B1 (en) 2013-08-15 2014-10-21 GM Global Technology Operations LLC Camshaft assembly
US9032922B2 (en) 2013-10-21 2015-05-19 GM Global Technology Operations LLC Camshaft assembly
WO2017028918A1 (en) * 2015-08-19 2017-02-23 Volvo Truck Corporation A variable valve actuation mechanism, an internal combustion engine, and a vehicle
CN109653830A (en) * 2018-12-20 2019-04-19 潍柴动力股份有限公司 A kind of variable valve lift system and engine

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GB1296157A (en) * 1969-08-12 1972-11-15
DE4124305A1 (en) * 1991-07-23 1993-01-28 Audi Ag Valve drive, esp. intake valve, for IC engine - has cams, positioned mirror-fashion on camshaft and levers, moved together in opposite direction by pressure medium
DE10241920A1 (en) * 2002-09-10 2004-03-18 Bayerische Motoren Werke Ag Valve control system for IC engine has at least two cams per cylinder on a camshaft with axial adjustment and with one cam with a circular outer profile to switch off the valve action
DE102004055852A1 (en) * 2004-09-30 2006-04-13 Bayerische Motoren Werke Ag Valve drive for internal combustion engine has switch curve device arranged to apply switching force only when cam device is in basic circle phase

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1296157A (en) * 1969-08-12 1972-11-15
DE4124305A1 (en) * 1991-07-23 1993-01-28 Audi Ag Valve drive, esp. intake valve, for IC engine - has cams, positioned mirror-fashion on camshaft and levers, moved together in opposite direction by pressure medium
DE10241920A1 (en) * 2002-09-10 2004-03-18 Bayerische Motoren Werke Ag Valve control system for IC engine has at least two cams per cylinder on a camshaft with axial adjustment and with one cam with a circular outer profile to switch off the valve action
DE102004055852A1 (en) * 2004-09-30 2006-04-13 Bayerische Motoren Werke Ag Valve drive for internal combustion engine has switch curve device arranged to apply switching force only when cam device is in basic circle phase

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8863714B1 (en) 2013-08-15 2014-10-21 GM Global Technology Operations LLC Camshaft assembly
US9464545B2 (en) 2013-08-15 2016-10-11 GM Global Technology Operations LLC Camshaft assembly
US9032922B2 (en) 2013-10-21 2015-05-19 GM Global Technology Operations LLC Camshaft assembly
WO2017028918A1 (en) * 2015-08-19 2017-02-23 Volvo Truck Corporation A variable valve actuation mechanism, an internal combustion engine, and a vehicle
EP3337960B1 (en) 2015-08-19 2019-11-20 Volvo Truck Corporation A variable valve actuation mechanism, an internal combustion engine, and a vehicle
US10648377B2 (en) 2015-08-19 2020-05-12 Volvo Truck Corporation Variable valve actuation mechanism, an internal combustion engine, and a vehicle
CN109653830A (en) * 2018-12-20 2019-04-19 潍柴动力股份有限公司 A kind of variable valve lift system and engine
CN109653830B (en) * 2018-12-20 2020-03-10 潍柴动力股份有限公司 Variable system of valve lift and engine

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