DE102004043328B4 - Adjustment device for camshafts of an internal combustion engine - Google Patents
Adjustment device for camshafts of an internal combustion engine Download PDFInfo
- Publication number
- DE102004043328B4 DE102004043328B4 DE102004043328.3A DE102004043328A DE102004043328B4 DE 102004043328 B4 DE102004043328 B4 DE 102004043328B4 DE 102004043328 A DE102004043328 A DE 102004043328A DE 102004043328 B4 DE102004043328 B4 DE 102004043328B4
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- Prior art keywords
- pressure
- channel
- camshaft
- locking
- diameter
- 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.)
- Expired - Fee Related
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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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
-
- 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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
-
- 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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
- F01L2001/34456—Locking in only one position
-
- 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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
- F01L2001/34469—Lock movement parallel to camshaft axis
-
- 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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34483—Phaser return springs
Abstract
Einrichtung (100, 200) zum Verstellen einer Nockenwelle einer Brennkraftmaschine – mit einem mit einer Kurbelwelle der Brennkraftmaschine in Antriebsverbindung stehenden kurbelwellenseitigen Bauteil (102, 202) – und einem der Nockenwelle zugeordneten, zu diesem relativ verdrehbaren nockenwellenseitigen Bauteil (104, 204), – wobei in einer vorbestimmten Drehlage das kurbelwellenseitige und das nockenwellenseitige Bauteil (102, 104, 202, 204) mittels einer hydraulisch beaufschlagbaren, zwischen einer Verriegelungs- und einer Entriegelungsstellung verstellbaren Verriegelungseinrichtung miteinander drehfest verbindbar sind – und zur Beaufschlagung der Verriegelungseinrichtung in Entriegelungsrichtung wenigstens ein zumindest annähernd radial einmündender Druckkanal (172, 272) vorgesehen ist, wobei – der wenigstens eine Druckkanal (172, 272) mittels der Verriegelungseinrichtung in Verriegelungsstellung verschlossen und in Entriegelungsstellung freigegeben ist, dadurch gekennzeichnet, dass zu einem vom wenigstens einen Druckkanal (172, 272) unabhängigen Druckabbau im Ringraum (266) ein Druckausgleichskanal (276) vorgesehen ist.Device (100, 200) for adjusting a camshaft of an internal combustion engine - with a crank shaft-side component (102, 202) which is in drive connection with a crankshaft of the internal combustion engine - and with a camshaft-side component (104, 204) assigned to the camshaft, wherein in a predetermined rotational position, the crankshaft-side and the camshaft side member (102, 104, 202, 204) by means of a hydraulically actable, adjustable between a locking and unlocking locking means are rotatably connected to each other - and at least one approximately at least approximately to act on the locking device in the unlocking radially inaugurating pressure channel (172, 272) is provided, wherein - the at least one pressure channel (172, 272) is closed by means of the locking device in the locked position and released in the unlocked position, characterized gekennzeic hnet, that a pressure equalization channel (276) is provided to one of the at least one pressure channel (172, 272) independent pressure reduction in the annular space (266).
Description
Die Erfindung betrifft eine Einrichtung zum Verstellen einer Nockenwelle einer Brennkraftmaschine mit einem mit einer Kurbelwelle der Brennkraftmaschine in Antriebsverbindung stehenden kurbelwellenseitigen Bauteil und einem der Nockenwelle zugeordneten, zu diesem relativ verdrehbaren nockenwellenseitigen Bauteil, wobei in einer vorbestimmten Drehlage das kurbelwellenseitige und das nockenwellenseitige Bauteil mittels einer hydraulisch beaufschlagbaren, zwischen einer Verriegelungs- und einer Entriegelungsstellung verstellbaren Verriegelungseinrichtung miteinander drehfest verbindbar sind und zur Beaufschlagung der Verriegelungseinrichtung in Entriegelungsrichtung wenigstens ein zumindest annähernd radial einmündender Druckkanal vorgesehen ist, wobei der wenigstens eine Druckkanal mittels der Verriegelungseinrichtung in Verriegelungsstellung verschlossen und in Entriegelungsstellung freigegeben ist.The invention relates to a device for adjusting a camshaft of an internal combustion engine with a crankshaft of the internal combustion engine in drive connection crankshaft side component and one of the camshaft associated with this relatively rotatable camshaft side component, wherein in a predetermined rotational position, the crankshaft side and the camshaft side component by means of a hydraulic acted upon, adjustable between a locking and unlocking locking device with each other are rotatably connected and for applying the locking device in the unlocking at least one at least approximately radially opening pressure channel is provided, wherein the at least one pressure channel is closed by means of the locking device in the locked position and released in unlocked position.
Derartige Einrichtungen erlauben eine Verstellung der Nockenwelle gegenüber der Kurbelwelle und somit der Steuerzeiten der von den Nocken dieser Welle betätigten Ventile und kommen einlass- und/oder auslassseitig zum Einsatz. Vorteile ergeben sich insbesondere in Bezug auf Emissionen, Kraftstoffverbrauch, Drehmomentenverlauf und Leistungsentfaltung. Um eine optimale und definierte Lage beim Start der Brennkraftmaschine zu gewährleisten, sind das kurbelwellenseitige und das nockenwellenseitige Bauteil in einer vorbestimmten Stellung mittels einer Verriegelungseinrichtung drehfest miteinander verbindbar.Such devices allow an adjustment of the camshaft relative to the crankshaft and thus the timing of the actuated by the cams of this shaft valves and are inlet and / or outlet side used. Advantages arise in particular in terms of emissions, fuel consumption, torque curve and power delivery. In order to ensure an optimal and defined position at the start of the internal combustion engine, the crankshaft side and the camshaft side component in a predetermined position by means of a locking device rotatably connected to each other.
Beispielsweise beschreibt die
Der Verriegelungsbolzen weist einen radial nach außen gerichteten Flansch auf und ist in einer einen verringerten und einen erweiterten Durchmesser aufweisenden Stufenbohrung geführt, wobei der Flansch an der Wandung des durchmessererweiterten Bereichs der Stufenbohrung anliegt. Mit dem Flansch ist eine axial gerichtete, druckbeaufschlagbare Ringfläche gebildet, welche mit einer korrespondierenden Ringfläche der Stufenbohrung, der Innenwand des erweiterten Abschnitts der Stufenbohrung und dem Verriegelungsbolzen einen Ringraum einschließt.The locking pin has a radially outwardly directed flange and is guided in a reduced and an enlarged diameter having stepped bore, wherein the flange rests against the wall of the diameter-expanded portion of the stepped bore. With the flange, an axially directed, pressurizable annular surface is formed, which encloses a ring space with a corresponding annular surface of the stepped bore, the inner wall of the extended portion of the stepped bore and the locking bolt.
Die Stirnfläche des Verriegelungsbolzens, welche der Ausnehmung im Stator zugeordnet ist, ist eben und wird durch ein Druckmedium entgegen der Federkraft beaufschlagt, wenn der Verriegelungsbolzen in Freigaberichtung bewegt werden soll. Eine Druckbeaufschlagung des Ringraums bedingt eine Beaufschlagung der axial gerichteten Ringfläche des Flansches und dient dazu, den Verriegelungsbolzen entgegen der Federkraft in Freigabestellung zu halten, sodass eine Verstellung der Nockenwelle erfolgen kann.The end face of the locking bolt, which is assigned to the recess in the stator, is flat and is acted upon by a pressure medium against the spring force when the locking bolt to be moved in the release direction. A pressurization of the annular space causes an action on the axially directed annular surface of the flange and serves to hold the locking bolt against the spring force in the release position, so that an adjustment of the camshaft can take place.
Es hat sich gezeigt, dass beim Abstellen der Brennkraftmaschine aufgrund des in deren Zylindern gegebenenfalls vorherrschenden Druckes oft ein Zurückdrehen der Kurbelwelle erfolgt, mit der Folge eines Druckanstiegs im Ringraum der Nockenwellenverstelleinrichtung, sodass der Verriegelungsbolzen unbeabsichtigt entriegelt. Gleichzeitig werden durch das Zurückdrehen der Verriegelungsbolzen und die korrespondierende Ausnehmung im Stator gegeneinander verdreht, sodass der Verriegelungsbolzen auch dann nicht mehr die Verriegelungsstellung einnehmen kann, wenn der Druck im Ringraum abfällt.It has been shown that turning off the crankshaft often takes place when the internal combustion engine is shut off due to the pressure possibly prevailing in the cylinders, with the result of an increase in pressure in the annular space of the camshaft adjusting device, so that the locking bolt unintentionally unlocks. At the same time rotated by the turning back of the locking bolt and the corresponding recess in the stator against each other, so that the locking bolt can not take the locked position even when the pressure in the annulus drops.
Aus der
Aufgabe der Erfindung ist es, eine eingangs genannte Einrichtung zur Verstellung einer Nockenwelle einer Brennkraftmaschine derart weiterzubilden, dass beim Abstellen der Brennkraftmaschine auch bei einem Zurückdrehen der Kurbelwelle keine Entriegelung und bei einer Bewegung der Verriegelungseinrichtung in Verriegelungsrichtung, insbesondere wenn der wenigstens eine Druckkanal ganz oder teilweise geschlossen ist, ein vom wenigstens einen Druckkanal unabhängiger Druckabbau erfolgt.The object of the invention is an initially mentioned device for adjusting a Camshaft an internal combustion engine such that when turning off the engine even when turning back the crankshaft unlocking and a movement of the locking device in the locking direction, especially if the at least one pressure channel is fully or partially closed, independent of the at least one pressure channel pressure reduction.
Die Lösung der Aufgabe erfolgt mit den Merkmalen des Anspruchs 1, wobei gemäß der zugrundeliegenden Idee zu einem vom wenigstens einen Druckkanal unabhängigen Druckabbau im Ringraum ein Druckausgleichskanal vorgesehen ist.The object is achieved by the features of claim 1, wherein according to the underlying idea of a pressure equalization channel independent of the at least one pressure channel pressure reduction in the annulus is provided.
Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments and modifications of the invention are the subject of the dependent claims.
Gemäß eines besonders bevorzugten Ausführungsbeispiels mündet bei einer erfindungsgemäßen Einrichtung, bei welcher die Verriegelungseinrichtung einen axialbeweglichen Stufenkolben mit einem durchmesserverringerten und einem durchmessererweiterten Bereich umfasst, der Stufenkolben in einer korrespondierenden stufigen Führung geführt ist und die axial gerichtete Ringfläche des Stufenkolbens mit der korrespondierenden Ringfläche der Führung einen Ringraum einschließt, der wenigstens eine Druckkanal im durchmessererweiterten Bereich der Führung ein und ist mittels des durchmessererweiterten Bereichs des Stufenkolbens verschließ- bzw. öffenbar.According to a particularly preferred embodiment, in a device according to the invention, in which the locking device comprises an axially movable stepped piston with a diameter-reduced and a diameter-expanded region, the stepped piston is guided in a corresponding stepped guide and the axially directed annular surface of the stepped piston with the corresponding annular surface of the guide a Annulus includes the at least one pressure channel in the diameter-expanded portion of the guide and by means of the diameter-expanded portion of the stepped piston can be closed or opened.
Zweckmäßigerweise ist entsprechend der axialen Bewegung des Stufenkolbens der wenigstens eine Druckkanal kontinuierlich verschließ- bzw. öffenbar, wobei die dem durchmessererweiterten Bereich des Stufenkolbens zugeordnete Außenkante der Stufe als Drosselkante wirkt.Conveniently, according to the axial movement of the stepped piston, the at least one pressure channel is continuously closable or openable, the outer edge of the step associated with the diameter-expanded region of the stepped piston acting as a throttle edge.
Als sehr vorteilhaft wird es angesehen, wenn der durchmessererweiterte Bereich des Stufenkolbens zumindest eine solche Länge aufweist, dass bei Anlage der axial gerichteten Ringfläche des Stufenkolbens an der korrespondierenden Ringfläche, entsprechend der Verriegelungsstellung der Verriegelungseinrichtung, der Führung der wenigstens eine Druckkanal vollständig geschlossen ist.It is considered to be very advantageous if the diameter-expanded region of the stepped piston has at least such a length that when the axially directed annular surface of the stepped piston adjoins the corresponding annular surface, corresponding to the locking position of the locking device, the guide is completely closed, at least one pressure channel.
Einem bevorzugten Ausführungsbeispiel der Erfindung zufolge ist der Druckausgleichskanal zumindest dann wirksam, wenn der wenigstens eine Druckkanal geschlossen ist. Als besonders günstig hat es sich erwiesen, den Druckausgleichskanal als eine den durchmessererweiterten Bereich des Stufenkolbens überbrückende Nut auszubilden. Diese Verriegelungsansteuerung ermöglicht ein geringeres Verdrehspiel, welches erforderlich ist, um im drucklosen Zustand ein unerwünschtes Klappern zu vermeiden.According to a preferred embodiment of the invention, the pressure equalization channel is at least effective when the at least one pressure channel is closed. It has proved to be particularly favorable to form the pressure equalization channel as a groove which bridges the diameter-extended region of the stepped piston. This locking control allows a lower backlash, which is required to avoid unwanted rattling in the unpressurized state.
Nachfolgend ist unter Bezugnahme auf Figuren ein besonders zu bevorzugendes Ausführungsbeispiel der Erfindung näher erläutert, dabei zeigen schematisch und beispielhaftA particularly preferred embodiment of the invention is explained in more detail with reference to figures, in which show schematically and by way of example
Der Außenrotor
Beiden Kammern
Innen-
Eine Einrichtung
Die Verriegelungseinrichtung umfasst einen in einem Flügel
Der stufenförmige Verriegelungsbolzen
Fällt beim Abstellen der Brennkraftmaschine mit abnehmender Drehzahl der Druck in den Leitungen A und B, nimmt der Verriegelungsbolzen
Während in Entriegelungsstellung der radial einmündende Kanal
In dem in der
Zweckmäßigerweise ist der Druckausgleichskanal
Mit der vorliegenden Einrichtung
Zum Entriegeln wird über die Leitung A die Stirnfläche
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102004043328.3A DE102004043328B4 (en) | 2004-09-08 | 2004-09-08 | Adjustment device for camshafts of an internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102004043328.3A DE102004043328B4 (en) | 2004-09-08 | 2004-09-08 | Adjustment device for camshafts of an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
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DE102004043328A1 DE102004043328A1 (en) | 2006-04-06 |
DE102004043328B4 true DE102004043328B4 (en) | 2017-06-29 |
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DE102004043328.3A Expired - Fee Related DE102004043328B4 (en) | 2004-09-08 | 2004-09-08 | Adjustment device for camshafts of an internal combustion engine |
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5360511B2 (en) * | 2009-03-25 | 2013-12-04 | アイシン精機株式会社 | Valve timing control device |
DE102010060263B4 (en) * | 2010-10-29 | 2014-08-21 | Hilite Germany Gmbh | Schwenkmotorversteller |
DE102016115349A1 (en) * | 2016-08-18 | 2018-02-22 | Hilite Germany Gmbh | Swivel motor adjuster for a camshaft |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19938596A1 (en) * | 1999-08-14 | 2001-02-15 | Schaeffler Waelzlager Ohg | Vane cell adjuster for rotary angle between camshaft and crankshaft in IC engines has locking pin released by oil pressure in late adjusting chamber, and held unlocked by pressure in early and late adjusting chambers |
DE10039921A1 (en) * | 1999-08-17 | 2001-04-05 | Denso Corp | Variable valve timing control system for an internal combustion engine |
DE10253883A1 (en) * | 2002-11-11 | 2004-05-27 | Hydraulik-Ring Gmbh | Adjusting device for camshaft of vehicle, working with hydraulically operated locking element |
-
2004
- 2004-09-08 DE DE102004043328.3A patent/DE102004043328B4/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19938596A1 (en) * | 1999-08-14 | 2001-02-15 | Schaeffler Waelzlager Ohg | Vane cell adjuster for rotary angle between camshaft and crankshaft in IC engines has locking pin released by oil pressure in late adjusting chamber, and held unlocked by pressure in early and late adjusting chambers |
DE10039921A1 (en) * | 1999-08-17 | 2001-04-05 | Denso Corp | Variable valve timing control system for an internal combustion engine |
DE10253883A1 (en) * | 2002-11-11 | 2004-05-27 | Hydraulik-Ring Gmbh | Adjusting device for camshaft of vehicle, working with hydraulically operated locking element |
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