EP3209869A1 - Procédé de fabrication d'un arbre à cames variable et arbre à cames variable - Google Patents

Procédé de fabrication d'un arbre à cames variable et arbre à cames variable

Info

Publication number
EP3209869A1
EP3209869A1 EP15771153.2A EP15771153A EP3209869A1 EP 3209869 A1 EP3209869 A1 EP 3209869A1 EP 15771153 A EP15771153 A EP 15771153A EP 3209869 A1 EP3209869 A1 EP 3209869A1
Authority
EP
European Patent Office
Prior art keywords
cam
inner shaft
outer shaft
fixed
adjusting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15771153.2A
Other languages
German (de)
English (en)
Inventor
Henning BRANDENBURGER
Alexander PAEPLOW
Alexander LÜBBERSTEDT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thyssenkrupp Dynamic Components Teccenter AG
Original Assignee
ThyssenKrupp Presta TecCenter AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ThyssenKrupp Presta TecCenter AG filed Critical ThyssenKrupp Presta TecCenter AG
Publication of EP3209869A1 publication Critical patent/EP3209869A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—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
    • F01L1/34413—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 composite camshafts, e.g. with cams being able to move relative to the camshaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0057—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by splittable or deformable cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0471—Assembled camshafts
    • F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • 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
    • F01L2303/02—Initial camshaft settings

Definitions

  • the present invention relates to a method of manufacturing an adjustable camshaft of a motor vehicle. Furthermore, the invention relates to an adjustable camshaft of a motor vehicle with at least one fixedly arranged on at least one outer shaft segment fixed cam and at least one with a concentric within the outer shaft segment extending inner shaft rotationally arranged adjusting cam.
  • adjustable camshafts are used in, for example, valve-controlled internal combustion engines and serve to selectively influence the timing of the valves of the engine with regard to its power and torque development, the fuel consumption and the exhaust emission.
  • the adjustable camshafts are constructed such that the camshaft has an outer shaft and an inner shaft disposed coaxially in this outer shaft.
  • the outer shaft and the inner shaft are rotatable relative to one another, for example, by means of an adjusting device.
  • the cam elements of the outer shaft are rotationally mounted on the outer shaft and the cam elements of the inner shaft against rotation on the inner shaft and rotatably mounted on the outer shaft, so that in a rotation of the Outer shaft relative to the inner shaft and the outer shaft connected to the cam elements are rotated relative to the camshaft connected to the inner elements.
  • a rotation of the inner shaft to the outer shaft or the outer shaft to the inner shaft is known, for example by means of a phaser allows so advantageously achieved a phase shift of the valve timing or the opening duration of the valves can be varied.
  • the inner shaft cam elements usually have recesses in which corresponding connecting elements of the inner shaft or connecting elements, which can be connected to the inner shaft, can be introduced.
  • Such connecting elements are, for example, pins, bolts or screws.
  • German Offenlegungsschrift DE197575404A1 discloses a corresponding camshaft having a connecting element which is in the form of a cylindrical pin is designed.
  • This cylinder pin is inserted by means of press fit into a through bore of the inner shaft and by means of clearance in the associated cam.
  • the corresponding cam has an outwardly cylindrical portion in which there is a bore into which the cylinder pin is introduced.
  • a prior processing of the cam is required to connect this with the connecting element of the inner shaft.
  • Such preparatory machining of the cam member increases manufacturing costs and manufacturing costs in the production of an adjustable camshaft assembly.
  • the object of the present invention to at least partially overcome the disadvantages described above with regard to an adjustable camshaft of a motor vehicle and in a method for producing such an adjustable camshaft of a motor vehicle.
  • the method for producing an adjustable camshaft of a motor vehicle comprises at least the following steps:
  • the adjustable camshaft according to the invention has a relative to the outer shaft adjustable and in particular rotatable inner shaft, which is arranged concentrically or coaxially to the outer shaft.
  • the inner shaft is within the outer shaft, which is for example in the form of a tube and thus has a through hole through which the inner shaft extends at least in sections.
  • the outer shaft has at least one outer shaft segment, which consequently is in the form of a section of the outer shaft and therefore forms a blank section which does not extend completely along the longitudinal axis of the inner shaft.
  • the adjustable camshaft also has at least one fixed cam and at least one adjusting cam, wherein the fixed cam is arranged rotationally fixed with the outer shaft and in particular the outer shaft segment, while the adjusting cam is arranged rotationally fixed to the inner shaft.
  • the fixed cam is rotated relative to the adjusting cam, so consequently there is a spread in terms of the angle between the adjusting cam and the fixed cam.
  • the here-mentioned adjustable camshaft is advantageously used in the field of motor vehicle technology, being understood as motor vehicles in the context of the invention, in particular land, air and water vehicles.
  • the adjustable camshaft in the field of engine technology and in particular in the field of gasoline and diesel engine technology applicable.
  • the adjustable camshaft advantageously serves to optimize the gas exchange and a variable compression ratio by a variation of the intake valve; to allow the reduction of pollutant and C0 2 emissions. Furthermore, it is conceivable that the adjustable camshaft serves to regulate the variable valve timing adjustments between inlet and outlet valves.
  • the adjustable camshaft is used to the mixture formation in the injecting engine Ren to optimize by increasing the charge movement in the combustion chamber based on a targeted phase shift of the intake valves, as well as to reduce the pollutant emissions of the cold start phase of the engine by means of catalytic heating, for example, by early opening of the exhaust valve.
  • an adjustable camshaft advantageously serves to control the exhaust aftertreatment system such as the particle regeneration filter by an outlet side variability or to control the exhaust gas turbocharger system by a corresponding outlet side variability.
  • the adjustable camshaft advantageously serves to enable the variability in the opening period of the valve lift, wherein a stepless opening duration of the entire cam profile, which extends over the fixed cam and the adjusting cam, is made possible by means of a spread of Verstellnockens relative to the fixed cam .
  • the Ventilabgriffelement which is for example a Rollenschlepphe- is in the first part of the valve lift curve in contact with the profile of the cam, wherein the contact changes from the transition point to the plateau-shaped profile of the adjustment.
  • An adjustment of such a camshaft and in particular of the inner shaft relative to the outer shaft is advantageously made possible by means of a phaser and in particular a dual-phaser or a double-phaser.
  • an outer shaft segment is advantageously arranged on an inner shaft and in particular pushed. Subsequently, it is possible that an arrangement section is produced on the surface of the inner shaft, the surface of the inner shaft being modified or changed.
  • the surface modification of the surface of the inner shaft for producing an arrangement section is arranged on the fixed cam on at least one section of the outer shaft segment and the adjusting cams on the inner shaft arrangement section.
  • the aforementioned steps may also have a mutually varying sequence.
  • the fixed cam itself to be applied to at least a portion of the outer shaft segment or to be connected thereto or to be arranged thereon before the surface modification of the inner shaft is generated. It is also conceivable that the surface modification of the inner shaft is generated before arranging an outer shaft segment on the inner shaft.
  • the surface modification of the inner shaft to a non-positive and / or positive and / or material connection of the Adjusting cam with the camshaft is used to rotationally connect the adjusting cam, in particular in the region of the arrangement portion of the inner shaft with this inner shaft, so that upon rotation of the inner shaft relative to the outer shaft, the torque can be transmitted to the adjusting cam, so that it is consistent with the inner shaft this is rotated about the central axis of rotation of the inner shaft.
  • the outer shaft segment which is in the form of a pipe section or hollow shaft section, is pushed over the inner shaft, which is advantageously designed as a solid shaft, so that the outer shaft segment at least partially surrounds the inner shaft. Consequently, the inner shaft is arranged centrally, preferably coaxially or concentrically in the outer shaft.
  • the surface modification is produced by means of a material deposition.
  • the surface of the inner shaft is modified in such a way that it has warping of its own material, in particular in the arrangement section.
  • the material throwing is produced by means of rolling.
  • a non-cutting machining with a rolling body, which rather serves for smoothing and solidification of material surfaces.
  • a rolling tool is pressed against the rotating inner shaft with great force advantageous, so that the material of the inner shaft begins to flow in such a way that it is thus displaced.
  • the method of rolling is performed by means of tools such as roller burnishing, which have a roughened active surface.
  • the outer diameter of the inner shaft increases at least in the area. If a cam is pushed onto the inner shaft after generation of the arrangement section or the material placement, which cam advantageously has a through bore through which the inner shaft can extend, at least one non-positive connection between at least in the region of the arrangement section which has a surface modification. see the cam and the inner shaft and in particular the modified surface of the inner shaft instead.
  • the fixed cam itself has a through hole, which is larger in diameter is, as the diameter of the through hole of the adjusting cam, in order to be pushed over the surface modification of the surface of the inner shaft, without that, for example, a frictional connection between the fixed cam and the inner shaft is generated.
  • the fixed cam and the adjusting cam to have a substantially comparably dimensioned through-bore diameter, wherein it would be necessary here for the fixed cam to be pushed onto the inner shaft before the surface modification of the inner shaft is generated and advantageously also be arranged on the outer shaft segment.
  • the clamping lug it is advantageously possible for the clamping lug to be frictionally connected to the outer shaft segment and in particular to a distal end of the outer shaft segment.
  • the arrangement of the fixed cam with the outer shaft segment via a positive and / or a material connection takes place.
  • the fixed cam is slid over at least a portion of the outer shaft segment, wherein the fixed cam advantageously has a through hole diameter which substantially corresponds to the outer diameter of the outer shaft segment to advantageously produce a press-fit connection between the outer shaft segment and the fixed cam.
  • the outer shaft segment has an insertion region, which can be configured in the form of an insertion bevel, a shoulder or a recess or the like. This insertion region is advantageously used to ensure that the fixed cam is rotationally connected to the outer shaft segment via this insertion region.
  • the lead-in area in particular a section of this lead-in area, also serves as a delimiting area, in order to prevent a further or an unplanned over-pushing of the fixed cam on the outer-shaft segment.
  • the adjustable camshaft has at least two fixed cams connected to one outer shaft segment each and an adjusting cam arranged between the fixed cams and rotationally connected to the inner shafts. Consequently, a cam package itself, which has a cam profile, consists of more than one fixed cam and one adjusting cam, namely advantageously at least two fixed cams and one adjusting cam, which is arranged between the two fixed cams. Consequently, it is conceivable that another fixed cam adjacent to the adjusting cam and another Au texwellensegment adjacent to the other fixed cam on the inner shaft are arranged, wherein the further fixed cam is arranged on the other outer shaft segment and in particular rotationally connected thereto.
  • the construction or assembly of the adjustable camshaft accordingly takes place in a modular design, in particular due to the advantageous modular construction of the outer shaft, which consists of at least one outer shaft module and advantageously consists of two or more outer shaft segments.
  • the fixed cam or the two fixed cams of a cam pack are connected to the outer shaft segment at least in a force-locking or positive-locking or material-locking manner.
  • the fixed cam is non-positively and positively and materially connected to the outer shaft segment.
  • the connection between the adjusting cam and the inner shaft segment which may also be connected to the inner segment at least non-positively or positively or materially.
  • the adjusting cam is positively connected via the material posing with the inner shaft.
  • a non-positive connection between the connecting cam and the outer shaft segment and the adjusting cam and the inner shaft enables a simple and cost-effective production or assembly of an adjustable camshaft for motor vehicles.
  • an adjustable camshaft of a motor vehicle which has at least one rotationally fixed on an outer shaft segment fixed cam and at least one concentrically within the outer shaft segment extending inner shaft rotationally arranged adjusting cam, wherein the adjusting cam at least partially non-positively with an at least partially along the inner shaft extending assembly portion of the inner shaft is connected, wherein the arrangement portion has a surface modification of the surface of the inner shaft.
  • the outer shaft segment is advantageous in the form of a pipe segment with a lateral surface and a through hole, through which extends at least partially the camshaft configured.
  • the inner shaft is advantageously a cylindrical rod-shaped element, particularly advantageously a solid shaft, which extends at least in sections through the through hole of the outer shaft segment.
  • the adjusting cams can be arranged to be rotatable or adjustable relative to the fixed cams in order to change a cam profile of a cam pack, which is formed from at least one fixed cam and at least one adjusting cam.
  • the adjusting cam and the fixed cams each advantageously have a through hole through which extends at least a portion of the inner shaft.
  • the fixed cam has such a dimensioned Through hole on that at least the outer shaft segment can extend in sections through this through hole or at least partially extend into the through hole.
  • the adjusting cam is placed between two fixed cams, which are designed as a single Festnockenmaschine or as a common Festnockenelement in double anvil design.
  • double anvil design is understood to mean an embodiment of the fixed cams in which the fixed cams have a common base region through which the throughbore extends, while in particular the camming region of the solid cams is designed to be mutually spaced. Consequently, a recess is provided between these two fixed cams interconnected in the base region, within which the adjusting cam is inserted.
  • the fixed cams or the fixed cams and the adjusting cams are advantageously concentric to each other, so that upon rotation of the fixed cams for the adjusting cams or the adjusting cams to the fixed cams, the cams are rotated about an identical axis of rotation.
  • the fixed cams and the adjusting cams form a common cam profile, which can be varied based on the relative rotational movement between the fixed cams and the adjusting cams.
  • the adjusting cam and in particular the Verstellnockenkontur comes into contact with a corresponding interacting with the respective cam contour tap element, such as a drag lever for transmitting the rotational movement of the camshaft in a translational movement to control the valves, if the Verstellnocken is rotated relative to the fixed cam and Consequently, the cam contour of the adjusting cam shifts relative to the cam contour of the fixed cam or the fixed cams or assumes a changed position.
  • the surface modification of the surface of the inner shaft is a Materialaufwerfung, which is produced for example by means of the Rollierbacters.
  • the adjusting cam is connected by means of a pressing and in particular by means of a frictional connection in the arrangement section with the inner shaft, so that upon rotation of the inner shaft and a rotation of the adjusting cam takes place.
  • the camshaft has at least two outer shaft segments, to each of which a fixed cam is arranged rotationally fixed.
  • the adjusting cam is enclosed by two fixed cams and correspondingly connected to the fixed cams outer shaft segments.
  • the outer shaft segment has at least one distal lateral surface region whose outer diameter is dimensioned at least in sections smaller than an outer diameter of the remaining lateral surface. Accordingly, the outer shaft segment advantageously has an insertion region at least at one of the distal ends and advantageously at both distal ends in the region of the lateral surface. This insertion area is advantageously used to postpone the fixed cam at least in sections on the outer shaft segment and advantageous to a section.
  • the insertion region is advantageously designed in the form of a substantially continuously decreasing or rising lead-in chamfer, a diameter taper, a recess, a shoulder or in a comparable geometric shape, by means of which an outer diameter, dimensioned at least in sections, in the insertion region, than in remaining outer shaft segment. It is furthermore conceivable that the length of these insertion areas or insertion area considered in the longitudinal direction of the outer shaft segment essentially corresponds to the width of the fixed cam, so that the fixed cam is advantageously completely, but at least almost completely arrangeable and moreover advantageously with the outer shaft segment is rotationally connected.
  • the adjusting cam and the fixed cam are arranged concentrically with respect to one another and that the through-bore of the fixed nose is dimensioned larger than the through-bore of the adjusting cam.
  • the through bore of the adjusting cam is dimensioned approximately as large as the outer diameter or the circumferential diameter of the inner shaft.
  • the through hole of the fixed cam is larger than the outer diameter or the circumferential diameter, the inner shaft dimensioned and particularly advantageous larger than the outer diameter of the material launching or rolling to allow this over there sliding away of the fixed cam on the Materialaufwerfung the inner shaft during the assembly process.
  • the through hole of the fixed cam is maximally identical to the outer diameter or to the circumferential diameter of the outer shaft segment in order to ensure a safe arrangement of the fixed cam on the outer shaft segment, in particular by means of a press fit, advantageously by generating a positive connection to allow.
  • Figure 1 is a perspective view of an embodiment of an adjustable
  • FIG. 2 shows in a sectional side view an embodiment of an adjustable camshaft according to the invention
  • FIG. 3 shows in a lateral sectional view an enlargement of the detail C, as shown in FIG.
  • FIG. 4 shows a perspective view of an embodiment of a cam assembly of an adjustable camshaft according to the invention
  • FIG. 5 shows a side sectional view of an embodiment of a cam pack of a camshaft according to the invention
  • Figure 6 is a perspective view of a detail of an embodiment of a camshaft according to the invention auf attachend a cam package in a first positioning and
  • FIG. 7 shows a perspective view of the detail of the camshaft according to the invention shown in FIG. 7 in a second positioning of the cam pack. Elements with the same function and mode of operation are each provided with the same reference numerals in FIGS.
  • FIG. 1 shows a perspective view of an embodiment of an adjustable camshaft 1 according to the invention.
  • the camshaft 1 has an inner shaft 2 and two outer shaft segments 3.1 and 3.2. Each outer shaft segment 3.1, 3.2 has at least one insertion region 10, which is formed on a distal lateral surface region 12.
  • the fixed cams 7.1, 7.2 are, as shown in the embodiment of Figure 1, a component of a cam package 4.1, 4.2, wherein it is conceivable that the camshaft 1 may have a plurality of such cam packages 4.1, 4.2.
  • Each cam package 4.1, 4.2 has a first fixed cam 7.1 and a second fixed cam 7.2, wherein an adjusting cam is arranged between the two fixed cam, 7.1, 7.2.
  • the inner shaft 2 extends through the through-bore of the fixed cams B F shown in FIG. 1, as well as through a through bore (not shown here) of the adjusting cams 8 and through a corresponding through-bore (not shown here) of the outer shaft segments 3.1 and 3.2.
  • the arrangement of the fixed cam 7.1, 7.2 and the adjusting cam 8 are illustrated in particular in Figures 2 and 3.
  • FIGS. 2 and 3 A sectional view of an embodiment of the adjustable camshaft 1 according to the invention is shown in FIGS. 2 and 3 in a side view, with FIG. 3 showing an enlarged view of the region C, as shown in FIG.
  • the section of an embodiment of a camshaft 1 according to the invention shown in FIGS. 2 and 2 has at least one cam pack 4 which has a first fixed cam 7.1 and a second fixed cam 7.2 and an adjusting cam 8 arranged between the fixed cam 7.1 and 7.2.
  • the cam pack 4 which has a first fixed cam 7.1 and a second fixed cam 7.2 and an adjusting cam 8 arranged between the fixed cam 7.1 and 7.2.
  • both outer shaft segments 3.1 and 3.2 advantageously have an insertion region 10 at both distal ends 12 and in particular at the distal lateral surface regions 12.
  • This insertion region can be designed, for example, in the form of a shoulder, an insertion bevel, a recess or recess or in a comparable geometrically changing shape of the lateral surface.
  • the outer diameter and in particular the circumferential diameter of the outer shaft segments 3.1 and 3.2 in the region of the insertion regions 10, as indicated by the reference character Da a smaller diameter than in the remaining region of the outer shaft segment, as indicated by the reference character Db.
  • the shape and shape or geometric configuration of the insertion regions 10 should not be limited to a defined geometric shape within the scope of the invention.
  • the insertion regions 10 are configured in such a way that advantageously a non-positive connection between the fixed cams 7.1 and 7.2 and the respective outer shaft segments 3.1 or 3.2 is ensured.
  • the insertion region 10 of the respective outer shaft segment 3.1 or 3.2 also serves to prevent the cam package 4 or the fixed cams 7.1 or 7.2 of the cam assembly 4 from being applied too far to the outer shaft segment 3.1 b between 3.2.
  • the outer shaft segment 3.1 or 3.2 it would also be conceivable for the outer shaft segment 3.1 or 3.2 to be first pushed or applied onto the inner shaft 2 before a rolling of the inner shaft 2 and in particular a surface treatment of the inner shaft 2 to produce a surface modification 20 takes place.
  • a first outer-shaft segment 3.1 is first pushed onto an inner shaft 2, which is applied, for example, in a chuck on a cam-setting machine. Subsequently, the rolling of the inner shaft 2 could take place in order to prevent material deposition 20 on the surface of the inner shaft 2. wave 2 to produce.
  • the cam package 4 advantageously with threaded or arranged between the fixed cam 7.1 adjusting cam 8, is applied to the inner shaft 2, so that there is a non-positive connection between the first fixed cam 7.1 and the first outer shaft segment 3.1 and the adjusting cam 8 and the surface modification 20 and the material launch 20 of the inner shaft 2 comes.
  • Too much postponement of the fixed cam 3.1, 3.2 on the outer shaft segments 3.1, 3.2 is advantageously made possible by a limiting element 9, as shown for example in FIG.
  • This delimiting element 9 is advantageously a component of the insertion region 10 and has a wall which extends substantially-at least in sections-in the radial direction.
  • FIG. 4 shows a perspective view of an embodiment of a cam pack 4, which is an element of the adjustable camshaft 1 according to the invention.
  • the cam package 4 has a first fixed cam 7.1 and a second fixed cam 7.2, which include the adjusting cam 8.
  • the adjusting cam 8 advantageously has an identical cam contour to the fixed cams 7.1 and 7.2 and is mounted concentrically to the fixed cams 7.1 and 7.2, so that upon movement of the adjusting cam 8 relative to the fixed cams 7.1 and 7.2, a rotation of the cams 7.1, 7.2, 8 order a common axis of rotation D, as shown in particular in FIG. 4, can take place.
  • the adjusting cam 8 is designed to be relatively movable relative to the fixed cams 7.1 and 7.2. As shown in FIG.
  • the through-bore B F of the fixed cam 7.1 or 7.2 as well as the through-bore B v of the adjusting cam 8 each have-at least in sections-a structured surface 30 or 31, which are identical to one another or else designed differently from one another can.
  • this structured surface 30, 31 is a non-positive connection between the fixed cam 7.1, 7.2 and the surfaces of the outer shaft segments 3.1 and 3.2 as well as between the adjusting cam 8 and the surface of the inner shaft 2, such as in Figs 3, optimized.
  • the fixed cams 7.1 and 7.2 are advantageous in their base 7.3 with each other connected and thus form a consisting of two cam profiles fixed cams. Such an arrangement of fixed cams to each other is also referred to in the context of the invention as a double anvil.
  • each fixed cam 7.1 and 7.2 which are spaced from each other, thus a recess is formed, in which the adjusting cam 8 is enclosed.
  • the fixed cam 7.1 or 7.2 and / or the adjusting cam 8 could be pressed onto a sleeve (not shown here), this sleeve at least with an outer shaft segment 3.1 or 3.2 or with the inner shaft 2, advantageously using a frictional Connection, be operatively connected or can be.
  • FIG. 5 a sectional view of an embodiment of a cam package 4 is shown schematically in a side view.
  • the cam package 4 shown in FIG. 5 advantageously has a first fixed cam 7.1 and a second fixed cam 7.2, not shown here, between which an adjusting cam 8 is arranged.
  • the adjusting cam 8 has a through hole B v , which is dimensioned smaller than the through hole B F of the fixed cams 7.1 and 7.2.
  • the fixed cams 7.1 or 7.2 or configured as a double anvil fixed cam element can be moved about an adjusting cam 8 identical axis of rotation D, so consequently the fixed cams 7.1, 7.2 and the adjusting cam 8 concentric or coaxial with respect to their axis of rotation D to each other.
  • the adjusting cam 8 has an open position 1 1 within which the transitional area 7.4 of the basic area 7.3 of the double-apex fixed cam runs. Based on the exemption 1 1 of the adjusting cam 8, a rotation of the adjusting cam 8 relative to the fixed cam 7.1 or 7.2 is possible.
  • this free position 11 also serves to support the inner shaft 2 in at least one of the outer shaft segments 3.1, 3.2.
  • Fig. 6 shows a perspective view schematically a cutout of an embodiment of a camshaft 1 according to the invention with a cam package 4 in a first positioning, in which the adjusting cam 8 has experienced no rotational movement relative to the fixed cam 7.1 or 7.2. Consequently, the cam package 4 has a flat cam contour.
  • a rotational movement of the inner shaft 2 relative to the outer shaft or the outer shaft segments 3.1 or 3.2 consequently, a rotational movement of the adjusting cam 8 takes place relative to the fixed cams 7.1 or 7.2.
  • the cam package 4 experiences a spread of the adjusting cam 8 relative to the fixed cams 7.1 and 7.2, as shown in particular in FIG. 7. Based on the spread, consequently, the cam profile of the entire cam pack 4, via which a tap element controls an adjustment or adjustment of intake and / or exhaust valves, is changed.
  • a production or production and assembly of an adjustable camshaft in a simple and cost-effective manner. Arranging a connecting element, such as in a pinning, for connecting the inner shaft with the adjusting cam is therefore advantageously no longer necessary.

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

Abstract

L'invention concerne un procédé de fabrication d'un arbre à cames variable ainsi qu'un arbre à cames variable destiné à un véhicule automobile. L'arbre à cames comporte au moins une came fixe agencée de manière bloquée en rotation au niveau d'au moins un segment d'arbre extérieur et au moins une came de réglage agencée de manière bloquée en rotation avec un arbre intérieur s'étendant concentriquement à l'intérieur du segment d'arbre extérieur. Le procédé comprend au moins les étapes suivantes : l'agencement d'un segment d'arbre extérieur sur l'arbre intérieur ; la production d'une modification de la surface de l'arbre intérieur pour produire au moins une partie agencement ; l'agencement de la came fixe sur au moins une partie du segment d'arbre extérieur ; et l'agencement de la came de réglage sur la partie agencement de l'arbre intérieur.
EP15771153.2A 2014-10-24 2015-09-30 Procédé de fabrication d'un arbre à cames variable et arbre à cames variable Withdrawn EP3209869A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014015649.4A DE102014015649A1 (de) 2014-10-24 2014-10-24 Verfahren zum Herstellen einer verstellbaren Nockenwelle und verstellbare Nockenwelle
PCT/EP2015/072588 WO2016062511A1 (fr) 2014-10-24 2015-09-30 Procédé de fabrication d'un arbre à cames variable et arbre à cames variable

Publications (1)

Publication Number Publication Date
EP3209869A1 true EP3209869A1 (fr) 2017-08-30

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EP15771153.2A Withdrawn EP3209869A1 (fr) 2014-10-24 2015-09-30 Procédé de fabrication d'un arbre à cames variable et arbre à cames variable

Country Status (7)

Country Link
US (1) US20170314427A1 (fr)
EP (1) EP3209869A1 (fr)
JP (1) JP2017535711A (fr)
KR (1) KR20170072910A (fr)
CN (1) CN107075978A (fr)
DE (1) DE102014015649A1 (fr)
WO (1) WO2016062511A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107476840A (zh) * 2017-09-22 2017-12-15 绵阳深度数控科技有限公司 凸轮轴装配结构和凸轮轴装配工艺
DE102018114584A1 (de) * 2018-06-18 2019-12-19 Thyssenkrupp Ag Ventiltriebsystem für eine Brennkraftmaschine und Verfahren zur Steuerung eines Ventiltriebs einer Brennkraftmaschine

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT9020789A1 (it) * 1989-07-04 1991-01-05 Gkn Automotive Ag Albero a camme
JP3189058B2 (ja) * 1990-11-19 2001-07-16 日本ピストンリング株式会社 嵌合部材にシャフトを圧入してなる機械要素及びその製造方法
DE4121951C1 (fr) * 1991-07-03 1992-12-24 Supervis Ets
US5664463A (en) * 1993-03-03 1997-09-09 Amborn; Peter Camshaft assembly with shaft elements positioned one inside the other and method of producing same
DE19757504B4 (de) 1997-12-23 2005-03-31 Daimlerchrysler Ag Gebaute Nockenwelle für eine Brennkraftmaschine
US5862783A (en) * 1998-03-12 1999-01-26 Lewis; Henry E. Variable angle camshaft
DE19918230C2 (de) * 1999-04-22 2001-06-28 Daimler Chrysler Ag Verfahren zum Herstellen eines aus einer übereutektischen Aluminium-Silizium-Legierung bestehenden, rohrförmigen Rohlings einer Zylinderlaufbüchse
DE102004056191B4 (de) * 2004-11-20 2008-08-28 Mahle Ventiltrieb Gmbh Nockenwelle für insbesondere Kraftfahrzeugmotoren
DE102005031241A1 (de) * 2005-07-01 2007-01-04 Fev Motorentechnik Gmbh Variabler Ventiltrieb einer Kolben-Brennkraftmaschine
DE102007042053A1 (de) * 2007-09-05 2009-03-12 Mahle International Gmbh Kolbenmotor
US8061318B2 (en) * 2007-09-27 2011-11-22 GM Global Technology Operations LLC Method and apparatus for continuously variable differential phasing of engine valve operation
US8459220B2 (en) * 2007-10-16 2013-06-11 Magna Powertrain Inc. Concentric phaser camshaft and a method of manufacture thereof
DE102009041426A1 (de) * 2009-09-16 2011-05-19 Thyssenkrupp Presta Teccenter Ag Nockenwelle mit variierbarer Ventilöffnungsdauer
DE102011077532A1 (de) * 2011-06-15 2012-12-20 Schaeffler Technologies AG & Co. KG Phasenverstelleinrichtung einer Nockenwelle für eine Verbrennungskraftmaschine
JP5426626B2 (ja) * 2011-09-03 2014-02-26 本田技研工業株式会社 開弁特性可変型内燃機関
CN103375212B (zh) * 2012-04-26 2016-12-28 日立汽车系统株式会社 内燃机的可变气门装置
KR102008680B1 (ko) * 2013-12-20 2019-08-08 현대자동차 주식회사 캠샤프트-인-캠샤프트 조립용 지그 장치
DE102014107798A1 (de) * 2013-12-20 2015-06-25 Hyundai Motor Company Nockenwelle-in-Nockenwelle-Vorrichtung eines Systems mit variabler Ventilöffnungsdauer
DE102014202439A1 (de) * 2014-02-11 2015-08-13 Mahle International Gmbh Brennkraftmaschine

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2016062511A1 *

Also Published As

Publication number Publication date
KR20170072910A (ko) 2017-06-27
US20170314427A1 (en) 2017-11-02
CN107075978A (zh) 2017-08-18
JP2017535711A (ja) 2017-11-30
WO2016062511A1 (fr) 2016-04-28
DE102014015649A1 (de) 2016-04-28

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