EP2300693B1 - Hydraulic camshaft adjuster - Google Patents
Hydraulic camshaft adjuster Download PDFInfo
- Publication number
- EP2300693B1 EP2300693B1 EP09765567A EP09765567A EP2300693B1 EP 2300693 B1 EP2300693 B1 EP 2300693B1 EP 09765567 A EP09765567 A EP 09765567A EP 09765567 A EP09765567 A EP 09765567A EP 2300693 B1 EP2300693 B1 EP 2300693B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inner body
- camshaft adjuster
- elements
- outlet line
- outer body
- 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.)
- Active
Links
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 210000000078 claw Anatomy 0.000 claims description 3
- 238000003825 pressing Methods 0.000 description 9
- 238000005245 sintering Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000002184 metal Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 210000003746 feather Anatomy 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001427 coherent effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Images
Classifications
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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
- 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
- F01L1/02—Valve drive
- F01L1/022—Chain drive
-
- 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
- F01L1/024—Belt drive
-
- 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
- F01L1/026—Gear drive
-
- 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
- F01L1/352—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 bevel or epicyclic gear
-
- 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
- F01L2001/34459—Locking in multiple positions
-
- 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
- F01L2001/34466—Locking means between driving and driven members with multiple locking devices
-
- 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
- F01L2001/34479—Sealing of phaser devices
-
- 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
-
- 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
- F01L2303/00—Manufacturing of components used in valve arrangements
Definitions
- the invention relates to a hydraulic camshaft adjuster for a camshaft of an internal combustion engine.
- a camshaft adjuster By means of a camshaft adjuster, it is possible to change a phase angle of a camshaft of an internal combustion engine relative to a crankshaft of the internal combustion engine driving the camshaft. As a result, a fuel consumption and raw emissions of the internal combustion engine can be lowered and improve a performance and torque characteristics of the internal combustion engine.
- a rempligelzellenversteller of the generic type is for example from the document DE 10 2004 022 097 A1 known.
- the wellgelzellenversteller thereby comprises an outer body which is drivable via a crankshaft, and an inner lying to the outer body arranged inner body, which is fixedly connected to a camshaft.
- the pamphlets DE 102005026553 B3 and DE 102005037525 A1 show various examples of a similar camshaft adjuster.
- Both the outer body and the inner body of such a rempligelzellenverstellers can be known sintered technology.
- metal powders are pressed into workpieces or compacts, also known as green compacts, and the workpieces are subsequently sintered.
- the workpieces are given their final strength by the metal powders forming a coherent crystal structure as they pass through a sintering furnace through diffusion and recrystallization processes.
- a height dimension of the workpieces obtained during pressing of the metal powder can deviate from a desired height dimension. These deviations are caused on the one hand by inaccuracies which adhere to a filling of a press mold of a pressing device and on the other hand by elasticities and / or friction conditions of the pressing device, which are subject to a temporal change.
- the present invention is therefore based on the object to provide a hydraulic camshaft adjuster in the form of a die gelzellenversteller, which is easier to manufacture sintering technology.
- the camshaft adjuster includes an externally drivable by means of a crankshaft of the internal combustion engine outer body with at least one hydraulic chamber, and a preferably coaxially disposed inside the inner body to the inner body, which is firmly connected to the camshaft. Under a fixed connection is a positive and / or non-positive connection between the inner body and the camshaft to understand.
- the inner body comprises at least one pivoting wing, which extends in the radial direction into the hydraulic chamber, thereby dividing the hydraulic chamber into a first working chamber and a second working chamber.
- the inner body further comprises at least an oil inlet and outlet pipe, which extends from a shell inside to a shell outside of the inner body and to one of the two working chambers, wherein generating a controlled hydraulic pressure in the ⁇ lzulauf- and ⁇ lablauftechnisch and in one of the working chambers of the inner body relative to the outer body to Adjustment of the camshaft is pivotable.
- the inner body is further joined together at least from a first element and a second element, wherein the two elements each have at least one geometry on mutually facing end sides, which together with the respective other element forms the oil inlet and oil drain line of the inner part.
- the two joined elements are identical and each have at least one extending from the shell inside to the shell outside projection which engages positively to connect the two elements in a corresponding recess of the other element and thereby with the Recess forms an interference fit, wherein the two projections together with the associated recesses each form a ⁇ lzulauf- and oil drain line of the inner part.
- An advantage of this embodiment is that in connection with the above-described sintering production of such inner body only a pressing tool is needed to produce workpieces of the same configuration.
- the two elements have a substantially radial extent over the circumference. It is also envisaged that the two elements have a substantially axial extent over the circumference.
- a geometry is to be understood as meaning a recess in the respective element which extends from the shell inner side to the outer shell side of the inner body and which does not penetrate the element in its longitudinal direction.
- An advantage of the proposed camshaft adjuster is that in connection with the previously described sintering production of such mecanicköper machining further processing for the production of ⁇ lzulauf- and oil drain line eliminated.
- the machining further processing can also include a deburring of ⁇ lzulaufund oil drain line. Rather, this ⁇ lzulauf- and oil drain line created by the joining of the two elements, which together form the inner body. The parting line formed by the two elements closes hydraulically tight.
- the inner body preferably has at least two pivoting wings which each extend into a hydraulic chamber of the outer body.
- the inner body has four pivoting wings which each extend into a hydraulic chamber of the outer body.
- the inner body has five pivoting vanes which each extend into a hydraulic chamber of the outer body.
- At least one of the two elements has at least one projection on the front side, which engages in a form-fitting manner for connecting the two elements into a corresponding recess of the other element and forms an interference fit with the recess.
- the projection may be formed in the manner of a claw or a web, wherein a web is a similar to a feather trained projection to understand.
- at least one of the two elements on the front side a plurality of projections which engage positively in the joining of the two elements in corresponding recesses of the other element, wherein under the projections both claw-like and web-like projections may be.
- the oil inlet and outlet pipe preferably extends in the radial direction from the shell inside to the outer shell side of the inner body.
- the ⁇ lzulauf- and oil drain line preferably has a quadrangular cross-sectional shape, which is due to the frontal geometries of the two elements joined together.
- the frontal geometries can also form other cross-sectional shapes, such as a circular or a triangular shape.
- a spring is arranged in the other working chamber between the outer body and the pivoting wing, which acts in a restoring manner in relation to the pivoting of the inner body.
- At least a first oil inlet and outlet pipe and a second ⁇ lzulauf- and oil drain line are provided, wherein the first ⁇ lzulauf- and oil drain line extends to one of the two working chambers, while the second ⁇ lzulauf- and oil drain line to extends to the other working chamber.
- the pivoting wing may be formed integrally with the inner body. Alternatively, the pivoting wing may be inserted into the inner body on the outside of the jacket.
- a receptacle for the swing-wing is provided on the outer shell side of at least one of the two elements.
- the recording can also be performed in two parts and be provided on both elements depending on a receptacle for the swing-wing.
- the receptacle is preferably formed on the projection. Further, the receptacle is preferably formed in the manner of a slot and aligned with the longitudinal direction of the inner body.
- the pivoting wing is preferably guided movably in the receptacle.
- a planetary gear is arranged between the pivoting wing and the outer body, wherein on the outer body a corresponding to the planetary gear segment is formed, which cooperates with the planetary gear, and wherein on the pivoting wing a pocket is formed in the the planetary gear is inserted.
- a planetary gear is disposed on both sides of the hydraulic chamber between a hollow cylindrical core of the inner body and the outer body, wherein on both sides of the hydraulic chamber on the hollow cylinder core corresponding to the associated planet gear segment is formed, which cooperates with the planetary gear, and wherein to both Side of the hydraulic chamber on the outer body, a pocket is formed, in which the associated planetary gear is used.
- both the outer body and the two joined elements of the inner body are formed as sintered parts.
- the two elements are already as compacts or green compacts joined together, which receive as workpieces their final strength during sintering.
- the Fig. 1 to 6 show an arrangement 2 of a preferably integrally formed outer body 4 and a multi-part inner body 6, which is preferably arranged coaxially inside lying to the outer body 4.
- the assembly 2 forms a unit of a hydraulic camshaft adjuster in the form of a so-called diegelzellenverstellers.
- the outer body 4 is drivable by means of a crankshaft of an internal combustion engine, such as a gear drive, wherein a toothed belt drive or a chain drive is possible.
- the inner body 6, however, is firmly connected to a camshaft of the internal combustion engine, which is insertable into the circular recess 26. Under a solid compound is a positive and / or non-positive connection to understand.
- the outer body 4 preferably comprises five hydraulic chambers 18, which are formed by five radially inwardly projecting body portions 20 of the outer body 4.
- a pivot wing 8 of the inner body 6 extends in the radial direction.
- the individual swing vanes 8 divide the individual hydraulic chambers 18 into a first working chamber 22 and a second working chamber 24.
- a drive torque of the crankshaft is transmitted to the camshaft adjuster by means of the outer body 4 introduced and transmitted via the working chambers 22, 24 on the inner body 6, which is fixedly connected to the camshaft.
- the inner body 6 preferably comprises ten oil feed and drain lines 14, 16, each extending preferably in the radial direction from an inner shell side 10 to a shell outer side 12 of the inner body 6 to one of the ten working chambers 22, 24, so that each of the five hydraulic chambers 18th two of the ten oil inlet and oil drain lines 14, 16 are assigned.
- a controlled hydraulic pressure in the lines 14 or 16 and in the associated working chambers 22, 24 the inner body 6 is pivoted relative to the outer body 4 for adjusting the camshaft in one direction.
- Such a clockwise pivoting is in the Fig. 6 illustrated by arrows, in which the lines 14 and the associated working chambers 22 are subjected to the controlled hydraulic pressure.
- the conduits 14, in this illustration, function as oil feed conduits, while the conduits 16 function as oil drain conduits.
- the in the Fig. 6 illustrated arrows further illustrate the flow direction of the oil.
- the individual hydraulic chambers 18 are designed to be concave in accordance with the circular movement described by the vanes 8, so that a pivoting movement of the inner body 6 relative to the outer body 4 can be initiated via the pivot vanes 8.
- the swing vanes 8 which are movably guided in the individual receptacles 36, conditionally pressed by the action of centrifugal force to the outer body 4, wherein the individual working chambers 22, 24 are sealed against each other.
- the outer wing 4 facing pivot wing sides 8a are preferably flat, so that the sealing of the working chambers 22, 24 via a pressure of the respective longitudinal edges of the swing wing sides 8a takes place.
- the swing wing sides 8a may also be designed convex.
- a sealing strip can also be arranged in a groove provided for this purpose on the individual pivot leaf sides 8a.
- a corresponding sealing strip can also be arranged on the individual radial projections 21 of the outer body 4 in a groove provided for this purpose, so that the individual hydraulic chambers 18 are also sealed against one another.
- a spring between the outer body and the associated pivoting wing is arranged in the individual hydraulic chambers in one of two working chambers, which acts with respect to a pivoting of the inner body restoring.
- the inner body 6, in the Fig. 7 to 9 . 12 and 13 is preferably assembled from a first element 28 and a second element 30, which describe a substantially hollow cylindrical core.
- the Fig. 7 to 9 illustrate a first embodiment of the inner body 6, while the Fig. 12 and 13 illustrate a second embodiment of the inner body 6.
- Both the outer body 4 and the two joined elements 28, 30 are preferably formed as sintered parts.
- the two elements 28, 30 have on facing end faces 38, 40 in each case five geometries 39, 41, 50, 52, which together with the respective other element 28, 30 form the oil inlet and oil drain lines 14, 16 of the inner body 6.
- the two elements 28, 30 have a substantially radial extent over the circumference.
- the two elements 28, 30 have a substantially axial extent over the circumference.
- a geometry 39, 41, 50, 52 is a recess in the respective element 28, 30 extending from the shell inner side 10 to the outer shell 12 of the inner body 6, which does not penetrate the element 28, 30 in its longitudinal direction.
- the oil inlet and outlet lines 14, 16 preferably have a quadrangular cross-sectional shape, which is variable in terms of their dimensions in the first embodiment of the inner body 6 and initially increases in the radial direction from the inner shell side 10 and then up to the outer shell side 12th reduced.
- the geometries 39, 41 each have a curvature 39a, 41a, which, however, are irrelevant with regard to the mode of operation of the vane cell adjuster. Rather, such a configuration of the two elements 28, 30 is based in a design of a pressing tool, which aims to reinforce the pressing tool.
- the quadrangular cross-sectional shape of the second embodiment is consistently constant with respect to its dimensions.
- the element 28 comprises frontally or on the element 30 facing end faces 40 five projections 34, which are each configured in the manner of a claw and engage in each case a corresponding recess 32 of the element 30 positively.
- the projections 34 in each case form an interference fit with the associated recesses 32.
- the parting line formed by the two elements 28, 30 also closes hydraulically tight.
- the individual preferably integrally formed pivoting wings 8 are inserted into the inner body 6 on the outside of the jacket 12.
- five preferably designed in the manner of a slot receptacles 36 are provided for the swing vanes 8, which are each formed on one of the projections 34 on the outer shell side 29 of the element 28.
- the receiving slots 36 are preferably aligned to the longitudinal direction of the inner body (6).
- the inner body 6 (FIG. Fig. 12 to 15 ) comprises the element 28 frontally or on the element 30 facing end face 40, five projections 42 and five projections 44 which are each configured in the manner of a web or a feather key and each in a corresponding recess or groove 46, 48th engage the element 30 positively.
- the individual webs 42, 44 and recesses 46, 48 extend in the radial direction of the inner body 6.
- the projections 42, 44 in each case with the associated recesses 46, 48 each have a press fit.
- the parting line formed by the two elements 28, 30 also closes hydraulically tight.
- each of an associated Mantelinnenseite 33, 35 extend to an associated outer shell side 29, 31 and in the assembled state of the two elements 28, 30 form a quadrangular cross-sectional shape, which is immutable in terms of their dimensions, in contrast to the first embodiment.
- the individual slot receptacles 36 are designed in two parts.
- five receptacles 36a are provided on the outer shell side 29 of the element 28, while on the outer shell side 31 of the element 30 five receptacles 36b are provided, which terminate flush with the receptacles 36a.
- the Fig. 16 and 17 illustrate a known from the prior art embodiment of a one-piece inner body 6, which is sintered made of a metal powder mixture.
- the oil inlet and oil drain lines 14, 16 have been drilled into the inner body 6 following a sintering process.
- the bores 54, 56, 58 are provided for so-called spring-loaded and hydraulically unlockable locking pins, which engage in the bores 54, 56, 58 in order to prevent unwanted pivoting of the inner body 6 relative to an outer body, not shown.
- An advantage of the proposed at least two-part design of the inner body 6, that in connection with the sintering production of such mecanicköper standing spanende further processing - this includes a deburring of the holes - for the production of ⁇ lzulauf- and oil drain lines deleted. Rather, these ⁇ lzulauf- and oil drain lines created by the joining of the two elements 28, 30, which together form the inner body 6.
- the Fig. 18 illustrates a third embodiment of the inner body 6, wherein the two joined elements 29b - one of which is in the Fig. 19 illustrated - are identical and each preferably five of the shell inside 10 to the outer shell side 12 of the inner body 6 extending projections 64 which engage positively for connection of the two elements 29b in a corresponding recess 62 of the other element 29b and thereby form an interference fit with the associated recesses 62.
- the projections 64 together with the associated recesses 62 each form a ⁇ lzulauf- and oil drain line 14, 16 of the inner part. 6
- An advantage of this embodiment is that in connection with the above-described sintering production of such inner body only a pressing tool is needed to produce workpieces of the same configuration.
- the Fig. 20 illustrates a fourth embodiment of the inner body 6, after which also the two assembled elements 29b are identical.
- the Fig. 21 illustrates one of the two elements 29b.
- the slit-like receptacles 36a, 36b of the respective elements 29b are each provided integrally with the hollow cylindrical core of the respective element 29b designed pivoting wings 8 ( Fig. 21 ).
- each one of the projections 64 and one of the recesses 62 extends one of the swing vanes 8 in the radial direction of the hollow cylindrical core of the inner body 6 to the outside.
- the projections 64 and recesses 62 are analogous to the third embodiment of the inner body 6 (FIG. Fig. 18 and 19 ) designed.
- Analogous to the fourth embodiment of the inner body 6 can also with reference to the Fig. 7 to 15 described embodiments - these are the first and the second embodiment of the inner body 6 - alternatively be provided instead of the slot-like receptacles 36, 36a, 36b, each formed integrally with the hollow cylindrical core of the respective inner body 6 pivoting wings.
- FIG. 22 an alternative arrangement 2 of a preferably integrally formed outer body 4 and a preferably two-piece inner body 6 is shown, which is preferably arranged coaxially inside lying to the outer body 4.
- the arrangement 2 preferably forms four hydraulic chambers 18, in each of which a pivoting wing 8 of the inner body 6 extends.
- the individual pivoting vanes 8 are preferably formed integrally with the hollow cylindrical core of the inner body 6.
- a planetary gear 68a arranged, which is inserted into a pocket 70 a, which is formed on the pivoting wing 8.
- a corresponding to the planetary gear 68a gear segment 66 is formed at the respective individual planetary gears 68a associated body portions of the outer body 4, which cooperates with the planetary gear 68a.
- the individual planet gears 68a seal the working chambers 22, 24 against each other hydraulically.
- a planetary gear 68b is disposed on both sides of the respective hydraulic chambers 18 between the hollow cylindrical core of the inner body 6 and the outer body 4.
- the individual planet gears 68b are inserted into a pocket 70b which is formed on the respective radially inwardly projecting body portion 20 of the outer body 4.
- a gear segment 72 is further formed on the hollow cylindrical core of the inner body 6, which is formed according to the associated planetary gear 68b and cooperates with this.
- the individual planet gears 68b each seal two adjacent hydraulic chambers 18 against each other hydraulically.
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Description
Die Erfindung betrifft einen hydraulischen Nockenwellenversteller für eine Nockenwelle einer Verbrennungskraftmaschine.The invention relates to a hydraulic camshaft adjuster for a camshaft of an internal combustion engine.
Aus dem Stand der Technik sind verschiedene Ausführungsformen von hydraulischen Nockenwellenverstellern bekannt, die nach dem Flügelzellenprinzip aufgebaut sind. Man spricht in diesem Zusammenhang auch von so genannten Flügelzellenverstellern.Various embodiments of hydraulic camshaft adjusters are known from the prior art, which are constructed according to the vane principle. One speaks in this context of so-called Flügelzellenverstellern.
Mittels eines Nockenwellenverstellers lässt sich eine Phasenlage einer Nockenwelle einer Verbrennungskraftmaschine relativ zu einer die Nockenwelle antreibenden Kurbelwelle der Verbrennungskraftmaschine verändern. Dadurch lassen sich ein Kraftstoffverbrauch und Rohemissionen der Verbrennungskraftmaschine senken sowie eine Leistungs- und Drehmomentcharakteristik der Verbrennungskraftmaschine verbessern.By means of a camshaft adjuster, it is possible to change a phase angle of a camshaft of an internal combustion engine relative to a crankshaft of the internal combustion engine driving the camshaft. As a result, a fuel consumption and raw emissions of the internal combustion engine can be lowered and improve a performance and torque characteristics of the internal combustion engine.
Ein Flügelzellenversteller der gattungsgemäßen Art ist beispielsweise aus der Druckschrift
Die Druckschriften
Sowohl der Außenkörper als auch der Innenkörper eines solchen Flügelzellenverstellers können bekanntlich sintertechnisch hergestellt werden. Bei der Herstellung von Sinterteilen werden Metallpulver zu Werkstücken bzw. Presslingen, auch Grünlinge genannt, verpresst und die Werkstücke anschließend gesintert. Beim Sintern erhalten die Werktücke ihre endgültige Festigkeit, indem die Metallpulver beim Durchlaufen eines Sinterofens durch Diffusions- und Rekristallisationsvorgänge ein zusammenhängendes Kristallgefüge bilden.Both the outer body and the inner body of such a Flügelzellenverstellers can be known sintered technology. In the production of sintered parts, metal powders are pressed into workpieces or compacts, also known as green compacts, and the workpieces are subsequently sintered. During sintering, the workpieces are given their final strength by the metal powders forming a coherent crystal structure as they pass through a sintering furnace through diffusion and recrystallization processes.
Ein beim Verpressen der Metallpulver erlangtes Höhenmaß der Werkstücke kann dabei von einem gewünschten Höhenmaß abweichen. Diese Abweichungen sind einerseits durch Ungenauigkeiten bedingt, die einer Befüllung einer Pressform einer Pressvorrichtung anhaften und andererseits durch Elastizitäten und / oder Reibungsverhältnisse der Pressvorrichtung, die einer zeitlichen Änderung unterliegen.A height dimension of the workpieces obtained during pressing of the metal powder can deviate from a desired height dimension. These deviations are caused on the one hand by inaccuracies which adhere to a filling of a press mold of a pressing device and on the other hand by elasticities and / or friction conditions of the pressing device, which are subject to a temporal change.
In den sintertechnisch hergestellten Innenkörper werden schließlich die zuvor beschriebenen Ölzulauf- und Ölablaufleitungen gebohrt, die sich von einer Mantelinnenseite zu einer Mantelaußenseite des Innenkörpers bis zu den zugeordneten Hydraulikkammern erstrecken. Diese Bohrungen werden schließlich auch entgratet.Finally, in the sintered inner body, the previously described oil feed and drain lines are drilled, which extend from a shell inside to a shell outside of the inner body up to the associated hydraulic chambers. These holes are finally deburred.
Der vorliegenden Erfindung liegt die daher Aufgabe zugrunde, einen hydraulischen Nockenwellenversteller in Form eines Flügelzellenversteller bereit zu stellen, der sintertechnisch einfacher herstellbar ist.The present invention is therefore based on the object to provide a hydraulic camshaft adjuster in the form of a Flügelzellenversteller, which is easier to manufacture sintering technology.
Diese Aufgabe wird mit einem hydraulischem Nockenwellenversteller mit den Merkmalen des Anspruchs 1 gelöst. Die in den Unteransprüchen angegebenen Merkmale sind Gegenstand von bevorzugten Ausgestaltungen und Weiterbildungen der Lösung. In der nachfolgenden Beschreibung werden ferner weitere vorteilhafte Merkmale angegeben, die Gegenstand weiterer Ausgestaltungen und Weiterbildungen der Lösung sein können. Diese weiteren Merkmale können dabei untereinander und / oder mit den Merkmalen der Anspruchsfassung kombiniert werden.This object is achieved with a hydraulic camshaft adjuster with the features of claim 1. The features specified in the dependent claims are the subject of preferred embodiments and developments of the solution. In the following description further advantageous features are given, which may be the subject of further refinements and developments of the solution. These further features can be combined with each other and / or with the features of the claim statement.
Es wird ein hydraulischer Nockenwellenversteller für eine Nockenwelle einer Verbrennungskraftmaschine vorgeschlagen, der in der Art eines Flügelzellenverstellers ausgebildet ist. Der Nockenwellenversteller umfasst einen mittels einer Kurbelwelle der Verbrennungskraftmaschine antreibbaren Außenkörper mit zumindest einer Hydraulikkammer, und einen vorzugsweise koaxial innen liegend zum Außenkörper angeordneten Innenkörper, der mit der Nockenwelle fest verbindbar ist. Unter einer festen Verbindung ist dabei eine formschlüssige und / oder kraftschlüssige Verbindung zwischen dem Innenkörper und der Nockenwelle zu verstehen.It is proposed a hydraulic camshaft adjuster for a camshaft of an internal combustion engine, which is designed in the manner of a vane-type adjuster. The camshaft adjuster includes an externally drivable by means of a crankshaft of the internal combustion engine outer body with at least one hydraulic chamber, and a preferably coaxially disposed inside the inner body to the inner body, which is firmly connected to the camshaft. Under a fixed connection is a positive and / or non-positive connection between the inner body and the camshaft to understand.
Der Innenkörper umfasst mindestens einen Schwenkflügel, der sich in radialer Richtung in die Hydraulikkammer erstreckt und dabei die Hydraulikkammer in eine erste Arbeitskammer und eine zweite Arbeitskammer unterteilt. Der Innenkörper umfasst ferner zumindest eine Ölzulauf- und Ölablaufleitung, die sich von einer Mantelinnenseite bis zu einer Mantelaußenseite des Innenkörpers und bis zu einer der beiden Arbeitskammern erstreckt, wobei unter Erzeugung eines gesteuerten hydraulischen Druckes in der Ölzulauf- und Ölablaufleitung und in einer der Arbeitskammern der Innenkörper gegenüber dem Außenkörper zur Verstellung der Nockenwelle verschwenkbar ist.The inner body comprises at least one pivoting wing, which extends in the radial direction into the hydraulic chamber, thereby dividing the hydraulic chamber into a first working chamber and a second working chamber. The inner body further comprises at least an oil inlet and outlet pipe, which extends from a shell inside to a shell outside of the inner body and to one of the two working chambers, wherein generating a controlled hydraulic pressure in the Ölzulauf- and Ölablaufleitung and in one of the working chambers of the inner body relative to the outer body to Adjustment of the camshaft is pivotable.
Der Innenkörper ist ferner zumindest aus einem ersten Element und einem zweiten Element zusammengefügt, wobei die beiden Elemente an einander zugewandten Stirnseiten jeweils mindestens eine Geometrie aufweisen, die zusammen mit dem jeweils anderen Element die Ölzulauf- und Ölablaufleitung des Innenteils bildet.The inner body is further joined together at least from a first element and a second element, wherein the two elements each have at least one geometry on mutually facing end sides, which together with the respective other element forms the oil inlet and oil drain line of the inner part.
In der erfindungsgemäßen Ausgestaltung des Nockenwellenverstellers sind die beiden zusammengefügten Elemente identisch ausgebildet und weisen jeweils mindestens einen sich von der Mantelinnenseite bis zu der Mantelaußenseite erstreckenden Vorsprung auf, der zur Verbindung der beiden Elemente in eine korrespondierende Ausnehmung des jeweils anderen Elements formschlüssig eingreift und dabei mit der Ausnehmung eine Presspassung bildet, wobei die beiden Vorsprünge zusammen mit den zugeordneten Ausnehmungen jeweils eine Ölzulauf- und Ölablaufleitung des Innenteils bilden.In the inventive design of the camshaft adjuster, the two joined elements are identical and each have at least one extending from the shell inside to the shell outside projection which engages positively to connect the two elements in a corresponding recess of the other element and thereby with the Recess forms an interference fit, wherein the two projections together with the associated recesses each form a Ölzulauf- and oil drain line of the inner part.
Vorteilhaft an dieser Ausgestaltung ist, dass im Zusammenhang mit der zuvor beschriebenen sintertechnischen Herstellung solcher Innenköper lediglich ein Presswerkzeug benötigt wird, um Werkstücke gleicher Ausgestaltung herzustellen.An advantage of this embodiment is that in connection with the above-described sintering production of such inner body only a pressing tool is needed to produce workpieces of the same configuration.
In vorteilhafter Ausgestaltung der Erfindung ist vorgesehen, dass die beiden Elemente über den Umfang eine im wesentliche radiale Erstreckung aufweisen. Es ist auch vorgesehen, dass die beiden Elemente über den Umfang eine im wesentliche axiale Erstreckung aufweisen.In an advantageous embodiment of the invention it is provided that the two elements have a substantially radial extent over the circumference. It is also envisaged that the two elements have a substantially axial extent over the circumference.
Unter einer Geometrie ist dabei eine sich von der Mantelinnenseite bis zu der Mantelaußenseite des Innenkörpers erstreckende Ausnehmung in dem jeweiligen Element zu verstehen, die das Element in dessen Längsrichtung nicht durchdringt.In this case, a geometry is to be understood as meaning a recess in the respective element which extends from the shell inner side to the outer shell side of the inner body and which does not penetrate the element in its longitudinal direction.
Vorteilhaft an dem vorgeschlagenen Nockenwellenversteller ist, dass die im Zusammenhang mit der zuvor beschriebenen sintertechnischen Herstellung solcher Innenköper stehende spanende Weiterbearbeitung zur Herstellung der Ölzulauf- und Ölablaufleitung entfällt. Die spanende Weiterbearbeitung kann dabei auch eine Entgratung der Ölzulaufund Ölablaufleitung umfassen. Vielmehr entsteht diese Ölzulauf- und Ölablaufleitung durch das Zusammenfügen der beiden Elemente, die zusammen den Innenkörper bilden. Die von den beiden Elementen gebildete Trennfuge schließt dabei hydraulisch dicht ab.An advantage of the proposed camshaft adjuster is that in connection with the previously described sintering production of such Innenköper machining further processing for the production of Ölzulauf- and oil drain line eliminated. The machining further processing can also include a deburring of Ölzulaufund oil drain line. Rather, this Ölzulauf- and oil drain line created by the joining of the two elements, which together form the inner body. The parting line formed by the two elements closes hydraulically tight.
Ferner sind durch die dünnere Ausgestaltung der beiden Elemente gegenüber einer einteiligen Ausgestaltung des Innenkörpers, die nach dem Stand der Technik bekannt ist, im Hinblick auf ein bei einem Verpressen von Metallpulvern zu so genannten Grünlingen erlangtes Höhenmaß vorteilhafterweise geringere Toleranzen in Längsrichtung des Innenkörpers erreichbar.Furthermore, due to the thinner design of the two elements compared to a one-piece embodiment of the inner body, which is known from the prior art, advantageously lower tolerances in the longitudinal direction of the inner body can be achieved with regard to a height dimension achieved when pressing metal powders into so-called green bodies.
Vorzugsweise weist der Innenkörper mindestens zwei Schwenkflügel auf, die sich jeweils in eine Hydraulikkammer des Außenkörpers erstrecken. In einer bevorzugten Ausgestaltung des Nockenwellenverstellers weist der Innenkörper vier Schwenkflügel auf, die sich jeweils in eine Hydraulikkammer des Außenkörpers erstrecken. In einer weiteren bevorzugten Ausgestaltung des Nockenwellenverstellers weist der Innenkörper fünf Schwenkflügel auf, die sich jeweils in eine Hydraulikkammer des Außenkörpers erstrecken.The inner body preferably has at least two pivoting wings which each extend into a hydraulic chamber of the outer body. In a preferred embodiment of the camshaft adjuster, the inner body has four pivoting wings which each extend into a hydraulic chamber of the outer body. In a further preferred embodiment of the camshaft adjuster, the inner body has five pivoting vanes which each extend into a hydraulic chamber of the outer body.
In einer bevorzugten Ausgestaltung des Nockenwellenverstellers weißt zumindest eines der beiden Elemente stirnseitig mindestens einen Vorsprung auf, der zur Verbindung der beiden Elemente in eine korrespondierende Ausnehmung des anderen Elements formschlüssig eingreift und dabei mit der Ausnehmung eine Presspassung bildet. Der Vorsprung kann dabei in der Art einer Klaue oder eines Steges ausgebildet sein, wobei unter einem Steg ein ähnlich einer Passfeder ausgebildeter Vorsprung zu verstehen ist. Vorzugsweise weist zumindest eines der beiden Elemente stirnseitig mehrere Vorsprünge auf, die bei dem Zusammenfügen der beiden Elemente in korrespondierende Ausnehmungen des anderen Elements formschlüssig eingreifen, wobei unter den Vorsprüngen sowohl klauenartige als auch stegartige Vorsprünge sein können.In a preferred embodiment of the camshaft adjuster, at least one of the two elements has at least one projection on the front side, which engages in a form-fitting manner for connecting the two elements into a corresponding recess of the other element and forms an interference fit with the recess. The projection may be formed in the manner of a claw or a web, wherein a web is a similar to a feather trained projection to understand. Preferably, at least one of the two elements on the front side a plurality of projections which engage positively in the joining of the two elements in corresponding recesses of the other element, wherein under the projections both claw-like and web-like projections may be.
Die Ölzulauf- und Ölablaufleitung erstreckt sich vorzugsweise in radialer Richtung von der Mantelinnenseite zu der Mantelaußenseite des Innenkörpers. Die Ölzulauf- und Ölablaufleitung weist vorzugsweise eine viereckige Querschnittsform auf, die durch die stirnseitigen Geometrien der beiden zusammen gefügten Elemente bedingt ist. Die stirnseitigen Geometrien können dabei auch andere Querschnittsformen bilden, etwa eine Kreis- oder eine Dreiecksform.The oil inlet and outlet pipe preferably extends in the radial direction from the shell inside to the outer shell side of the inner body. The Ölzulauf- and oil drain line preferably has a quadrangular cross-sectional shape, which is due to the frontal geometries of the two elements joined together. The frontal geometries can also form other cross-sectional shapes, such as a circular or a triangular shape.
In einer weiteren bevorzugten Ausgestaltung des Nockenwellenverstellers ist in der anderen Arbeitskammer eine Feder zwischen dem Außenkörper und dem Schwenkflügel angeordnet sein, die in Bezug auf die Verschwenkung des Innenkörpers rückstellend wirkt.In a further preferred embodiment of the camshaft adjuster, a spring is arranged in the other working chamber between the outer body and the pivoting wing, which acts in a restoring manner in relation to the pivoting of the inner body.
In einer weiteren besonders bevorzugten Ausgestaltung des Nockenwellenverstellers sind zumindest eine erste Ölzulauf- und Ölablaufleitung und eine zweite Ölzulauf- und Ölablaufleitung vorgesehen, wobei sich die erste Ölzulauf- und Ölablaufleitung bis zu einer der beiden Arbeitskammern erstreckt, während sich die zweite Ölzulauf- und Ölablaufleitung bis zu der anderen Arbeitskammer erstreckt.In a further particularly preferred embodiment of the camshaft adjuster at least a first oil inlet and outlet pipe and a second Ölzulauf- and oil drain line are provided, wherein the first Ölzulauf- and oil drain line extends to one of the two working chambers, while the second Ölzulauf- and oil drain line to extends to the other working chamber.
Der Schwenkflügel kann einteilig mit dem Innenkörper ausgebildet sein. Alternativ kann der Schwenkflügel an der Mantelaußenseite in den Innenkörper eingesetzt sein. Dabei ist an der Mantelaußenseite an mindestens einem der beiden Elemente eine Aufnahme für den Schwenkflügel vorgesehen. Alternativ dazu kann die Aufnahme auch zweigeteilt ausgeführt und an beiden Elementen je eine Aufnahme für den Schwenkflügel vorgesehen sein. Dabei ist die Aufnahme vorzugsweise an dem Vorsprung ausgebildet. Ferner ist die Aufnahme vorzugsweise in der Art eines Schlitzes ausgebildet und zu der Längsrichtung des Innenkörpers ausgerichtet. Der Schwenkflügel ist dabei vorzugsweise in der Aufnahme beweglich geführt.The pivoting wing may be formed integrally with the inner body. Alternatively, the pivoting wing may be inserted into the inner body on the outside of the jacket. In this case, a receptacle for the swing-wing is provided on the outer shell side of at least one of the two elements. Alternatively, the recording can also be performed in two parts and be provided on both elements depending on a receptacle for the swing-wing. In this case, the receptacle is preferably formed on the projection. Further, the receptacle is preferably formed in the manner of a slot and aligned with the longitudinal direction of the inner body. The pivoting wing is preferably guided movably in the receptacle.
In einer weiteren bevorzugten Ausgestaltung des Nockenwellenverstellers ist zwischen dem Schwenkflügel und dem Außenkörper ein Planetenrad angeordnet, wobei an dem Außenkörper ein zu dem Planetenrad korrespondierendes Zahnradsegment ausgebildet ist, das mit dem Planetenrad zusammen wirkt, und wobei an dem Schwenkflügel eine Tasche ausgebildet ist, in die das Planetenrad eingesetzt ist. Ferner ist dabei zu beiden Seiten der Hydraulikkammer zwischen einem Hohlzylinderkern des Innenkörpers und dem Außenkörper ein Planetenrad angeordnet, wobei zu beiden Seiten der Hydraulikkammer an dem Hohlzylinderkern ein zu dem zugeordneten Planetenrad korrespondierendes Zahnradsegment ausgebildet ist, das mit dem Planetenrad zusammen wirkt, und wobei zu beiden Seiten der Hydraulikkammer an dem Außenkörper eine Tasche ausgebildet ist, in die das zugeordnete Planetenrad eingesetzt ist.In a further preferred embodiment of the camshaft adjuster, a planetary gear is arranged between the pivoting wing and the outer body, wherein on the outer body a corresponding to the planetary gear segment is formed, which cooperates with the planetary gear, and wherein on the pivoting wing a pocket is formed in the the planetary gear is inserted. Further, a planetary gear is disposed on both sides of the hydraulic chamber between a hollow cylindrical core of the inner body and the outer body, wherein on both sides of the hydraulic chamber on the hollow cylinder core corresponding to the associated planet gear segment is formed, which cooperates with the planetary gear, and wherein to both Side of the hydraulic chamber on the outer body, a pocket is formed, in which the associated planetary gear is used.
In diesem Zusammenhang wird zu näheren Einzelheiten auf die Druckschrift
In einer weiteren bevorzugten Ausgestaltung des Nockenwellenverstellers sind sowohl der Außenkörper als auch die beiden zusammengefügten Elemente des Innenkörpers als Sinterteile ausgebildet. Die beiden Elemente sind dabei schon als Presslinge bzw. Grünlinge zusammenfügbar, die als Werktücke ihre endgültige Festigkeit beim Sintern erhalten.In a further preferred embodiment of the camshaft adjuster, both the outer body and the two joined elements of the inner body are formed as sintered parts. The two elements are already as compacts or green compacts joined together, which receive as workpieces their final strength during sintering.
Im Folgenden werden Ausführungsbeispiele der Erfindung unter Bezugnahme auf die Zeichnungen eingehend erläutert. Die aus den Zeichnungen und aus den zugehörigen Beschreibungen hervorgehenden Merkmale beschränken sich dabei nicht auf die jeweiligen Ausführungsbeispiele. Auch sind diese Merkmale nicht beschränkend auszulegen. Vielmehr dienen diese Merkmale zur Veranschaulichung einer beispielhaften Umsetzung. Darüber hinaus sind die einzelnen Merkmale im Hinblick auf mögliche weitere Ausgestaltungen und Weiterbildungen der Lösung untereinander wie auch mit Merkmalen aus der obigen Beschreibung zu weiteren Ausgestaltungen kombinierbar, die im einzelnen nicht dargestellt sind. Es zeigen:
- Fig. 1
- eine Vorderansicht einer Einheit eines Flügelzellenverstellers,
- Fig. 2
- eine perspektivische Ansicht der in der
Fig. 1 gezeigten Einheit, - Fig. 3
- eine Seitenansicht der in der
Fig. 1 gezeigten Einheit, - Fig. 4
- eine Schnittansicht entlang der in der
Fig. 3 dargestellten Schnittlinie A - A in Richtung der Pfeile, - Fig. 5
- eine weitere Schnittansicht entlang der in der
Fig. 3 dargestellten Schnittlinie A - A in zu der Richtung der Pfeile entgegen gesetzter Richtung, - Fig. 6
- eine Überlagerung der beiden Schnittansichten,
- Fig. 7
- eine Explosionsdarstellung einer ersten Ausführungsform eines Innenkörpers in einer ersten perspektivischen Ansicht,
- Fig. 8
- eine Explosionsdarstellung der ersten Ausführungsform des Innenkörpers in einer zweiten perspektivischen Ansicht,
- Fig. 9
- eine perspektivische Ansicht der ersten Ausführungsform des Innenkörpers in einem zusammengefügten Zustand,
- Fig. 10
- eine perspektivische Ansicht eines ersten Elements der ersten Ausführungsform des Innenkörpers,
- Fig. 11
- eine perspektivische Ansicht eines zweiten Elements der ersten Ausführungsform des Innenkörpers,
- Fig. 12
- eine Explosionsdarstellung einer zweiten Ausführungsform des Innenkörpers,
- Fig. 13
- eine perspektivische Ansicht der zweiten Ausführungsform des Innenkörpers in einem zusammengefügten Zustand,
- Fig. 14
- eine perspektivische Ansicht eines ersten Elements der zweiten Ausführungsform des Innenkörpers,
- Fig. 15
- eine perspektivische Ansicht eines zweiten Elements der zweiten Ausführungsform des Innenkörpers,
- Fig. 16
- eine perspektivische Ansicht einer nach dem Stand der Technik bekannten Ausführungsform des Innenkörpers,
- Fig. 17
- eine weitere perspektivische Ansicht der nach dem Stand der Technik bekannten Ausführungsform des Innenkörpers,
- Fig. 18
- eine perspektivische Ansicht einer dritten Ausführungsform des Innenkörpers in einem zusammengefügten Zustand,
- Fig. 19
- eine perspektivische Ansicht eines Elements der dritten Ausführungsform des Innenkörpers,
- Fig. 20
- eine perspektivische Ansicht einer vierten Ausführungsform des Innenkörpers in einem zusammengefügten Zustand,
- Fig. 21
- eine perspektivische Ansicht eines Elements der vierten Ausführungsform des Innenkörpers und
- Fig. 22
- eine Vorderansicht einer weiteren Einheit eines Flügelzellenverstellers mit Planetenrädern.
- Fig. 1
- a front view of a unit of a Flügelzellenverstellers,
- Fig. 2
- a perspective view of the in the
Fig. 1 shown unit, - Fig. 3
- a side view of the in the
Fig. 1 shown unit, - Fig. 4
- a sectional view along in the
Fig. 3 illustrated section line A - A in the direction of the arrows, - Fig. 5
- another sectional view along in the
Fig. 3 illustrated section line A - A in opposite direction to the direction of the arrows, - Fig. 6
- a superposition of the two sectional views,
- Fig. 7
- an exploded view of a first embodiment of an inner body in a first perspective view,
- Fig. 8
- an exploded view of the first embodiment of the inner body in a second perspective view,
- Fig. 9
- a perspective view of the first embodiment of the inner body in an assembled state,
- Fig. 10
- a perspective view of a first element of the first embodiment of the inner body,
- Fig. 11
- a perspective view of a second element of the first embodiment of the inner body,
- Fig. 12
- an exploded view of a second embodiment of the inner body,
- Fig. 13
- a perspective view of the second embodiment of the inner body in an assembled state,
- Fig. 14
- a perspective view of a first element of the second embodiment of the inner body,
- Fig. 15
- a perspective view of a second element of the second embodiment of the inner body,
- Fig. 16
- a perspective view of a known prior art embodiment of the inner body,
- Fig. 17
- a further perspective view of the known from the prior art embodiment of the inner body,
- Fig. 18
- a perspective view of a third embodiment of the inner body in an assembled state,
- Fig. 19
- a perspective view of an element of the third embodiment of the inner body,
- Fig. 20
- a perspective view of a fourth embodiment of the inner body in an assembled state,
- Fig. 21
- a perspective view of an element of the fourth embodiment of the inner body and
- Fig. 22
- a front view of another unit of a vane with planetary gears.
Die
Der Innenkörper 6 umfasst vorzugsweise zehn Ölzulauf- und Ölablaufleitungen 14, 16, die sich jeweils vorzugsweise in radialer Richtung von einer Mantelinnenseite 10 zu einer Mantelaußenseite 12 des Innenkörpers 6 bis zu einer der zehn Arbeitskammern 22, 24 erstrecken, so dass jeder der fünf Hydraulikkammern 18 zwei der zehn Ölzulauf- und Ölablaufleitungen 14, 16 zugeordnet sind. Unter Erzeugung eines gesteuerten hydraulischen Druckes in den Leitungen 14 oder 16 und in den zugeordneten Arbeitskammern 22, 24 wird der Innenkörper 6 gegenüber dem Außenkörper 4 zur Verstellung der Nockenwelle in eine Richtung verschwenkt. Eine solche Verschwenkung im Uhrzeigersinn ist in der
Die einzelnen Hydraulikkammern 18 sind entsprechend der von den Flügeln 8 beschriebenen Kreisbewegung konkav ausgestaltet, so dass über die Schwenkflügel 8 eine Schwenkbewegung des Innenkörpers 6 relativ zu dem Außenkörper 4 eingeleitet werden kann. Beim Antreiben des Außenkörpers 4 durch die Kurbelwelle werden die Schwenkflügel 8, die in den einzelnen Aufnahmen 36 beweglich geführt sind, bedingt durch die Wirkung einer Fliehkraft an den Außenkörper 4 angepresst, wobei die einzelnen Arbeitskammern 22, 24 gegen einander abgedichtet werden.The individual
Die dem Außenkörper 4 zugewandten Schwenkflügelseiten 8a sind vorzugsweise plan ausgebildet, so dass die Abdichtung der Arbeitskammern 22, 24 über eine Pressung der jeweiligen Längskanten der Schwenkflügelseiten 8a erfolgt. Alternativ dazu können die Schwenkflügelseiten 8a auch konvex ausgestaltet sein. Ferner kann an den einzelnen Schwenkflügelseiten 8a unabhängig von deren planer oder konvexer Ausgestaltung auch eine Dichtleiste in einer dafür vorgesehenen Nut angeordnet sein. Eine entsprechende Dichtleiste kann auch an den einzelnen radialen Vorsprüngen 21 des Außenkörpers 4 in einer dafür vorgesehenen Nut angeordnet sein, so dass auch die einzelnen Hydraulikkammern 18 gegen einander abgedichtet werden.The
Nach einer alternativen - in den Figuren nicht dargestellten - Ausführungsform der Erfindung ist in den einzelnen Hydraulikkammern in einer von zwei Arbeitskammern eine Feder zwischen dem Außenkörper und dem zugeordneten Schwenkflügel angeordnet, die in Bezug auf eine Verschwenkung des Innenkörpers rückstellend wirkt.According to an alternative - not shown in the figures - embodiment of the invention, a spring between the outer body and the associated pivoting wing is arranged in the individual hydraulic chambers in one of two working chambers, which acts with respect to a pivoting of the inner body restoring.
Der Innenkörper 6, der in den
Unter einer Geometrie 39, 41, 50, 52 ist dabei eine sich von der Mantelinnenseite 10 bis zu der Mantelaußenseite 12 des Innenkörpers 6 erstreckende Ausnehmung in dem jeweiligen Element 28, 30 zu verstehen, die das Element 28, 30 in dessen Längsrichtung nicht durchdringt.In this case, a
Die Ölzulauf- und Ölablaufleitungen 14, 16 weisen dabei vorzugsweise eine viereckige Querschnittsform auf, die bei der ersten Ausführungsform des Innenkörpers 6 in Bezug auf ihre Abmessungen veränderlich ist und sich in radialer Richtung von der Mantelinnenseite 10 ausgehend zunächst vergrößert und dann bis zu der Mantelaußenseite 12 verkleinert. Zudem weisen die Geometrien 39, 41 jeweils eine Krümmung 39a, 41 a auf, die jedoch in Bezug auf die Funktionsweise des Flügelzellenverstellers ohne Bedeutung sind. Vielmehr ist eine derartige Ausgestaltung der beiden Elemente 28, 30 in einer Gestaltung eines Presswerkzeugs begründet, die eine Verstärkung des Presswerkzeugs bezweckt. Die viereckige Querschnittsform der zweite Ausführungsform hingegen ist in Bezug auf ihre Abmessungen durchgängig konstant.The oil inlet and
Bei der ersten Ausführungsform des Innenkörpers 6 (
Die einzelnen vorzugsweise einteilig ausgebildeten Schwenkflügel 8 sind an der Mantelaußenseite 12 in den Innenkörper 6 eingesetzt. Dabei sind an der Mantelaußenseite 29 des Elements 28 fünf vorzugsweise in der Art eines Schlitzes ausgebildete Aufnahmen 36 für die Schwenkflügel 8 vorgesehen, die jeweils an einem der Vorsprünge 34 ausgebildet sind. Die Aufnahmeschlitze 36 sind dabei vorzugsweise zu der Längsrichtung des Innenkörpers (6) ausgerichtet.The individual preferably integrally formed pivoting
Bei der zweiten Ausführungsform des Innenkörpers 6 (
Ferner sind im Unterschied zu der ersten Ausführungsform die einzelnen Schlitzaufnahmen 36 zweigeteilt ausgeführt. Dabei sind an der Mantelaußenseite 29 des Elements 28 fünf Aufnahmen 36a vorgesehen, während an der Mantelaußenseite 31 des Elements 30 fünf Aufnahmen 36b vorgesehen sind, die mit den Aufnahmen 36a bündig abschließen.Furthermore, in contrast to the first embodiment, the
Die
Vorteilhaft an der vorgeschlagenen mindestens zweiteiligen Ausbildung des Innenkörpers 6 ist, dass die im Zusammenhang mit der sintertechnischen Herstellung solcher Innenköper stehende spanende Weiterberarbeitung - diese umfasst auch eine Entgratung der Bohrungen - zur Herstellung der Ölzulauf- und Ölablaufleitungen entfällt. Vielmehr entstehen diese Ölzulauf- und Ölablaufleitungen durch das Zusammenfügen der beiden Elemente 28, 30, die zusammen den Innenkörper 6 bilden.An advantage of the proposed at least two-part design of the
Ferner sind durch die dünnere Ausgestaltung der beiden Elemente 28, 29b, 30 gegenüber einer einteiligen Ausgestaltung des Innenkörpers (
Die
Vorteilhaft an dieser Ausgestaltung ist, dass im Zusammenhang mit der zuvor beschriebenen sintertechnischen Herstellung solcher Innenköper lediglich ein Presswerkzeug benötigt wird, um Werkstücke gleicher Ausgestaltung herzustellen.An advantage of this embodiment is that in connection with the above-described sintering production of such inner body only a pressing tool is needed to produce workpieces of the same configuration.
Die
Analog zu der vierten Ausführungsform des Innenkörpers 6 (
In der
Ferner ist zu beiden Seiten der jeweiligen Hydraulikkammern 18 zwischen dem hohlzylinderförmigen Kern des Innenkörpers 6 und dem Außenkörper 4 ein Planetenrad 68b angeordnet. Die einzelnen Planetenräder 68b sind dabei in eine Tasche 70b eingesetzt, die an dem jeweiligen radial nach innen vorspringenden Körperabschnitt 20 des Außenkörpers 4 ausgebildet ist. Zu beiden Seiten der jeweiligen Hydraulikkammern 18 ist dabei ferner an dem hohlzylinderförmigen Kern des Innenkörpers 6 ein Zahnradsegment 72 ausgebildet, das entsprechend des zugeordneten Planetenrades 68b ausgebildet ist und mit diesem zusammen wirkt. Die einzelnen Planetenräder 68b dichten dabei jeweils zwei benachbarte Hydraulikkammern 18 gegeneinander hydraulisch ab.Further, a planetary gear 68b is disposed on both sides of the respective
Claims (15)
- Hydraulic camshaft adjuster (2) for a camshaft of an internal combustion engine, comprising- an outer body (4) which can be driven by means of a crankshaft of the internal combustion engine and has at least one hydraulic chamber (18), and- an inner body (6) disposed inside the outer body (4), which can be fixedly connected to the camshaft and has at least one pivoting vane (8) extending in the radial direction into the hydraulic chamber (18), thereby dividing the hydraulic chamber (18) into a first working chamber (22) and a second working chamber (24),
and- the inner body (6) has at least one oil inlet and oil outlet line (14, 16) which extends from a casing interior (10) to a casing exterior (12) of the inner body (6) and as far as one of the two working chambers (22),- the inner body (6) can be pivoted relative to the outer body (4) in order to adjust the camshaft by generating a controlled hydraulic pressure in the oil inlet and oil outlet line (14, 16) and in one of the working chambers (22),
and- the inner body (6) is assembled from at least a first element (28) and a second element (30),- the two elements (28, 30) each have at least one geometry (39, 39a, 41, 41a, 50, 52) on mutually facing end faces (38, 40) which forms the oil inlet and oil outlet line (14, 16) of the inner part (6) in conjunction with the other respective element (28, 30),
characterised in that- the two assembled elements (29b) are of an identical design and each has at least one projection (64) extending from the casing interior (10) to the casing exterior (12) which locates in a positive fit in a co-operating recess (62) of the other respective element in order to connect the two elements (29b), thereby forming a press-fit with the recess (62), and the two projections (64) respectively form an oil inlet and oil outlet line (14, 16) of the inner part (6) in conjunction with the co-operating recesses (62). - Camshaft adjuster (2) as claimed in claim 1, characterised in that at least one of the two elements (28, 30) has at least one projection (34, 42, 44) at the end face which locates in a positive fit in a co-operating recess (32, 46, 48) of the other respective element (30) in order to connect the two elements (28, 30), thereby forming a press-fit with the recess (32, 46, 48).
- Camshaft adjuster (2) as claimed in claim 2, characterised in that the projection is provided in the form of a claw (34) or in the form of a web (42, 44).
- Camshaft adjuster (2) as claimed in one of the preceding claims, characterised in that the oil inlet and oil outlet line (14, 16) extends in the radial direction from the casing interior (10) to the casing exterior (12) of the inner body (6).
- Camshaft adjuster (2) as claimed in one of the preceding claims, characterised in that the oil inlet and oil outlet line (14, 16) has a square cross-section which is either constant or variable in terms of its dimensions.
- Camshaft adjuster (2) as claimed in one of the preceding claims, characterised in that a spring is disposed in the other working chamber (24) between the outer body (4) and the pivoting vane (8), the effect of which is to reset the pivoting movement of the inner body (6).
- Camshaft adjuster (2) as claimed in one of the preceding claims, characterised in that at least a first oil inlet and oil outlet line (14) and a second oil inlet and oil outlet line (16) are provided, and the first oil inlet and oil outlet line (14) extends as far as one of the two working chambers (22), whilst the second oil inlet and oil outlet line (16) extends as far as the other working chamber (24).
- Camshaft adjuster (2) as claimed in one of claims 1 to 7, characterised in that the pivoting vane (8) is formed integrally with the inner body (6).
- Camshaft adjuster (2) as claimed in one of claims 1 to 7, characterised in that the pivoting vane (8) is inserted in the inner body (6) on the casing exterior (12).
- Camshaft adjuster (2) as claimed in claim 9, characterised in that a mount (36) for the pivoting vane (8) is provided on the casing exterior (12) on at least one of the two elements (28, 30) or a mount (36a, 36b) for the pivoting vane (8) is provided on the two elements (28, 30).
- Camshaft adjuster (2) as claimed in claim 10, characterised in that the mount (36) is provided on the projection (34).
- Camshaft adjuster (2) as claimed in one of claims 10 to 11, characterised in that the pivoting vane (8) is displaceably guided in the mount (36).
- Camshaft adjuster (2) as claimed in one of the preceding claims, characterised in that a planet gear (68a) is disposed between the pivoting vane (8) and the outer body (4), and a gear wheel segment (66) co-operating with the planet gear (68a) is provided on the outer body (4), and a pocket (70a) is provided on the pivoting vane (8) in which the planet gear (68a) is inserted.
- Camshaft adjuster (2) as claimed in one of the preceding claims, characterised in that a planet gear (68b) is disposed between a hollow cylindrical core of the inner body (6) and the outer body (4) on both sides of the hydraulic chamber (18), and a gear wheel segment (72) co-operating with the planet gear (68b) is provided on the hollow cylindrical core on both sides of the hydraulic chamber (18), and a pocket (70b) is provided on the outer body (4) on both sides of the hydraulic chamber (18) in which the associated planet gear (68b) is inserted.
- Camshaft adjuster (2) as claimed in one of the preceding claims, characterised in that the outer body (4) and the two assembled elements (28, 30) of the inner body (6) are sintered parts.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008028640A DE102008028640A1 (en) | 2008-06-18 | 2008-06-18 | Hydraulic camshaft adjuster |
PCT/EP2009/004172 WO2009152987A1 (en) | 2008-06-18 | 2009-06-10 | Hydraulic camshaft adjuster |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2300693A1 EP2300693A1 (en) | 2011-03-30 |
EP2300693B1 true EP2300693B1 (en) | 2012-08-15 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09765567A Active EP2300693B1 (en) | 2008-06-18 | 2009-06-10 | Hydraulic camshaft adjuster |
Country Status (7)
Country | Link |
---|---|
US (1) | US8550046B2 (en) |
EP (1) | EP2300693B1 (en) |
JP (1) | JP5313342B2 (en) |
CN (1) | CN102124188B (en) |
DE (1) | DE102008028640A1 (en) |
ES (1) | ES2393085T3 (en) |
WO (1) | WO2009152987A1 (en) |
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- 2009-06-10 JP JP2011513924A patent/JP5313342B2/en active Active
- 2009-06-10 CN CN200980123117.6A patent/CN102124188B/en active Active
- 2009-06-10 ES ES09765567T patent/ES2393085T3/en active Active
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Also Published As
Publication number | Publication date |
---|---|
CN102124188B (en) | 2014-10-29 |
ES2393085T3 (en) | 2012-12-18 |
EP2300693A1 (en) | 2011-03-30 |
US8550046B2 (en) | 2013-10-08 |
US20110126785A1 (en) | 2011-06-02 |
JP2011524495A (en) | 2011-09-01 |
JP5313342B2 (en) | 2013-10-09 |
CN102124188A (en) | 2011-07-13 |
WO2009152987A1 (en) | 2009-12-23 |
DE102008028640A1 (en) | 2009-12-24 |
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