EP3295000A1 - Camshaft segment with camshaft bearing - Google Patents
Camshaft segment with camshaft bearingInfo
- Publication number
- EP3295000A1 EP3295000A1 EP16720151.6A EP16720151A EP3295000A1 EP 3295000 A1 EP3295000 A1 EP 3295000A1 EP 16720151 A EP16720151 A EP 16720151A EP 3295000 A1 EP3295000 A1 EP 3295000A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- camshaft
- shaft
- oil
- bearing
- segment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
- F16H53/02—Single-track cams for single-revolution cycles; Camshafts with such cams
- F16H53/025—Single-track cams for single-revolution cycles; Camshafts with such cams characterised by their construction, e.g. assembling or manufacturing features
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
-
- 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
- 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
- F01L2001/0476—Camshaft bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2202/00—Solid materials defined by their properties
- F16C2202/20—Thermal properties
- F16C2202/22—Coefficient of expansion
Definitions
- the present invention relates to a camshaft segment having at least one camshaft having a shaft element and a cam element, and a camshaft bearing for supporting the camshaft, at least in the radial or axial direction.
- camshafts control the gas exchange and thus the combustion within an internal combustion engine. They are driven by the crankshaft, so that their rotational movement is in a defined relationship to the rotational movement with the crankshaft and thus the position of the piston in the cylinders.
- camshafts also serve to transport, for example, lubricating oil or control oil for controlling the phaser in the direction of a phaser.
- the phase divider itself is known to be used, for example, to change the control times of the valve control of an internal combustion engine during operation.
- the phase divider or the camshaft adjuster, together with the cams of the camshaft and also other functional parts, can be attached to the camshaft in such a way that the latter serves to supply oil to the phase splitter, in order to enable a process-reliable and low-wear functionality of the phaser.
- the transfer point of this oil medium to the camshaft and consequently the phase divider is advantageously a constituent part of the cylinder head or the cylinder head cover, in particular bearing elements connected thereto for supporting the camshaft in the cylinder head cover.
- the cylinder head cover is known manner made of aluminum material or a cast aluminum element.
- Known manner there are in a cast aluminum element compared to the camshaft or the transmission element for transferring the oil, which are made in particular of an iron material, significant differences in the coefficient of expansion. Consequently, within a temperature range of, for example, -40 ° C to + 140 ° C, a large gap change of the gap formed between the bearing and the cam shaft occurs.
- the camshaft segment according to the invention has at least one camshaft having a shaft element and a cam element, and at least one camshaft bearing for supporting the camshaft at least in the radial or axial direction, wherein the camshaft bearing at least one Ol undergraduategabeelement for passing an oil medium, in particular a flowable oil medium to the camshaft and the Camshaft has at least one oil guide element for receiving and conducting the oil medium at least in the direction of an oil path.
- the camshaft bearing has a reduction element whose material has an expansion coefficient that is comparable to the expansion coefficient of the material of the camshaft.
- the camshaft has particularly advantageous two camshaft bearing, which supports the camshaft at their respective ends in the radial or axial or in the radial and axial directions.
- a radial bearing is used as the camshaft bearing, which supports the shaft element as a rotary bearing and thus prevents two freedoms in the radial direction of the circular cross section of the shaft element.
- the camshaft bearing is a thrust bearing or one of the camshaft bearing is a radial bearing and the other of the camshaft bearing is a thrust bearing.
- the shaft element is advantageously used to transport the oil medium from the camshaft bearing, in particular a camshaft bearing point to a phase divider, which is connectable to the camshaft.
- the flowable oil medium is, for example, a lubricating oil or a control oil for controlling the phaser or adjusting element.
- the shaft element is for example a hollow shaft, which is also called outer shaft. can be net.
- the at least one cam element is advantageously rotationally connected to the shaft element and extends away from the outer surface of the shaft element to the outside.
- the camshaft has at least two cam elements, in particular a fixed cam element and a Verstellnockenelement.
- one of the cam elements is rotationally connected to the outer shaft, while the other of the cam elements is rotationally connected to the inner shaft.
- a corresponding fixing element which advantageously connects the adjusting cam element with the inner shaft, extends through an opening of the outer shaft, starting from the adjusting cam element to the inner shaft.
- both cam elements that is to say the adjusting cam element and also the fixed cam element, are arranged on the outer surface of the shaft element, in particular of the outer shaft, wherein the adjusting cam element is movable relative to the fixed cam element.
- the expansion coefficient is understood in particular to mean the thermal expansion coefficient or the thermal expansion coefficient. This is a parameter that describes the behavior of a substance with respect to the change of its dimension during a temperature change. In this case, this thermal expansion is dependent, in particular, on the material, so that the thermal expansion coefficient is consequently a substance-specific material constant.
- the camshaft bearing itself is advantageously a component of the cylinder head or the cylinder head cover, which is at least partially and advantageously completely made of an aluminum material, in particular of an aluminum casting, in order to advantageously reduce the weight of the entire camshaft segment.
- the reduction element is a ring element or a sleeve element.
- the ring element or the sleeve element can be closed in itself or also have an opening.
- the reduction element extends at least at least partially in the circumferential direction around the shaft element and surrounds this at least in sections.
- the reduction element is introduced into the material of the camshaft bearing such that the reduction element is completely encased by the material of the camshaft bearing. It is conceivable that the reduction element is poured during the manufacturing process of the camshaft bearing in this. This means that during the manufacturing process of the camshaft bearing, the reduction element is encased by means of the material of the camshaft bearing and in particular with the aluminum casting material. However, it is also conceivable that the camshaft bearing has a recess in such a way that the reduction element is pressed into the camshaft bearing after the manufacture of the camshaft bearing and consequently the casting process of the camshaft bearing. In the latter case, the reduction element is not completely encased or surrounded by the material of the camshaft bearing.
- the reduction element is introduced into the material of the camshaft bearing such that an outer surface of the reduction element is surrounded by the material of the camshaft bearing, wherein an inner surface of the reduction element serves as a running surface of the camshaft bearing.
- this inner surface of this reduction element does not contact the material of the camshaft bearing and is advantageously at least partially in contact with the shaft element, in particular the outer surface of the shaft element.
- the inner surface therefore advantageously serves as an inner ring of the camshaft bearing itself, which serves as a running surface for the camshaft and consequently is in direct contact with the camshaft or the shaft element of the camshaft.
- the reduction element has projections in the region of one or both of its distal ends, whereby advantageously arranging the camshaft bearing with the reduction element is improved, in particular by a portion of the camshaft bearing in the region formed by the projections Recess (s) of the reduction element is pressed in, so as to allow an interference fit between the camshaft bearing, in particular the area of oil transfer of the camshaft bearing, and the reduction element.
- the reduction element consists at least partially of an iron material.
- the reduction element consists entirely of a ferrous material or of a material of comparable quality.
- the reduction element has a lower coefficient of thermal expansion than, in particular, the camshaft bearing and, advantageously, the region of oil transfer of the camshaft bearing or the Cylinder head cover, which is made for example of a ferrous material or a material comparable quality. Consequently, there is advantageously a lower thermal deformation of the reduction element and in particular the entire camshaft bearing or the region of the oil transfer point of the camshaft bearing, during operation of the internal combustion engine and during the heating of the corresponding regions.
- the reduction element is coated at least in sections.
- the coating is advantageously applied in the region of the running surface or contact surface to the camshaft, in particular to the shaft element of the camshaft.
- the friction between the reduction element and the camshaft is avoided. This advantageously reduces the wear on the surfaces of the reduction element or the camshaft to be supported.
- the oil guide element it is possible for the oil guide element to have a shaft element through-opening which extends from an outer shaft element surface to an inner shaft element surface.
- the camshaft additionally has an end piece, which is arranged such that the shaft element can be connected to a phase divider for variable valve control. It is possible that the tail extends at least partially into the shaft member.
- the shaft element advantageously has at least one corresponding recess or is a hollow shaft, into the cavity or in the passage opening of which the end piece extends.
- the phaser which can also be referred to as a phaser, advantageously serves to change the control times of the valve control of the internal combustion engine during operation.
- the rotational angle or the valve lift of the camshaft can be changed by, for example, an adjustment of the inner shaft relative to the outer shaft and consequently the cam member rotatably connected to the inner shaft relative to the cam member rotatably connected to the outer shaft.
- the oil guide member has a tail passage opening extending from an outer end piece surface to an inner end piece surface extends through the end piece, has.
- the oil transfer element of the camshaft bearing is arranged in alignment with the shaft element passage opening and / or the tail passage opening such that an oil medium is introduced from the camshaft bearing, in particular the oil transfer point or the oil transfer region of the camshaft bearing via the shaft element and / or the end piece into the inner region of the shaft element can be used to ensure a process-safe guiding or guiding of the oil medium to the phase divider.
- the shaft element passage opening is arranged in alignment with the end piece passage opening.
- the oil guide element additionally has an oil guide sleeve for forming an oil path, advantageously a plurality of oil paths.
- the oil guide sleeve coaxially extends within the shaft member and in particular within a recess or the cavity of the shaft member.
- FIG. 2 shows a lateral sectional view of a section of a further, in particular second embodiment of the camshaft segment according to the invention
- FIG. 1 shows a lateral sectional view of a section of an embodiment of the camshaft segment according to the invention
- FIG. 3 shows a side sectional view of a section of a further, in particular third embodiment of the camshaft segment according to the invention
- Figure 4 is a side sectional view of a detail of another, in particular fourth embodiment of the camshaft segment according to the invention, and 5 shows a side sectional view of a section of a further, in particular fifth embodiment of the camshaft segment according to the invention. Elements with the same function and mode of operation are each provided with the same reference numerals in FIGS.
- FIG. 1 a section of an embodiment, in particular a first embodiment of the camshaft segment 1 according to the invention is shown schematically in a lateral sectional representation.
- the camshaft segment 1 has, inter alia, a camshaft 2 having a shaft element 3 and a cam element 4 connected in a rotationally fixed manner to the shaft element 3.
- the shaft element 3 is advantageously a hollow shaft or has at least one cavity, which extends in the axial direction of the shaft element 3, that means along the longitudinal axis L of the shaft element 3, at least in sections.
- the camshaft bearing 5 is advantageously a part of the camshaft segment 1 and has a reduction element 10, which is completely encased by the material of the camshaft bearing 5 and according to the embodiment of the Camshaft bearing 5 in the circumferential direction around the shaft segment 3 at least partially extends.
- the reduction element 10 shown in FIG. 1 is formed for example in the form of a sleeve.
- the camshaft bearing 5, in particular the oil transfer region of the camshaft bearing 5 shown in FIG. 1 is formed at least partially and advantageously completely from an aluminum material or aluminum material.
- the reduction element 10 is advantageously formed from an iron material or iron material.
- the reduction element 10 has a material of comparable quality to the material of the camshaft segment 1, in particular of the shaft element 3.
- the camshaft bearing 5 or the oil transfer region of the camshaft bearing 5 has at least one and advantageously two ⁇ lübergabeele- elements 6 and 6.1, which are in the region of the inner surface 5.1 of the camshaft bearing 5, in particular the running surface of the camshaft bearing 5 is formed.
- an oil medium is transferred from the camshaft bearing 5 to the camshaft 2, in particular the shaft element 3 of the camshaft 2.
- the shaft element 3 of the camshaft 2 has at least one and advantageously two oil guide elements 7 and 7.1, respectively.
- the number of oil-guiding elements 7, 7.1 is advantageously matched to the number of oil transfer elements 6, 6.1. Accordingly, it is also conceivable that the camshaft bearing 5 three or more oil transfer elements 6 and 6.1 and the shaft member 3, three or more oil guide elements 7 or 7.1.
- the oil guide element 7, 7.1 as shown in the embodiment of Fig.
- the oil guide element 7, 7.1 extends so completely through the shaft member 3, so that it completely penetrates the shaft segment 3 viewed in the radial direction.
- the oil guide element 7, 7.1 penetrates this wall in two regions of the circumferential wall of the shaft element 3 such that an oil medium is transported or conducted starting from an outer surface 3.1 to an inner surface 3.2 of the shaft element 3 , The favors introduction of the oil medium in the inner region of the shaft member 3 even with a rotating shaft member 3 about the central longitudinal axis L.
- the position of the oil transfer element 6 and 6.1 is advantageous to the position of the oil guide element 7 or 7.1 aligned so designed that a transfer starting from the camshaft bearing 5, in particular the oil transfer element 6 or 6.1 of the camshaft bearing 5, into the region of the oil guide element 7 or 7.1.
- the viewed in the axial direction arrangement of oil transfer element 6 or 6.1 and the oil guide element 7 and 7.1 is coordinated with each other to ensure a flawless oil medium transfer.
- the oil guide element 7 or 7.1 advantageously serves to direct the oil medium received into the inner region of the shaft element 3, from where it is transported further in the direction of a phaser, not shown here.
- the oil guide element 7, 7.1 additionally has an oil guide sleeve, which is characterized in particular by the reference numeral 8.
- the Olestshülse 8 extends substantially within the shaft member 3, in particular coaxially to the shaft member 3.
- the Olestshülse 8 a collar 8.1, which extends substantially in the radial direction, starting from a distal end of the Ol Operationshülse 8 in the direction of the wall of the shaft element. 3 , in particular to the inner surface 3.2 of the shaft member 3 extends.
- the collar 8.1 contacts the inner surface 3.2 of the shaft element 3. This advantageously a transport of an oil medium supports a defined direction and avoid in an unwanted direction.
- the collar 8.1 is advantageously used as a limiting element or sealing element.
- the Olestshülse 8 is a transport of the absorbed oil medium in the direction of the phaser, not shown conceivable bar.
- the Olestshülse 8 allows the formation of two mutually different oil paths P1 and P2.
- the first oil path P1 extends from the first oil guide element 7 into the interior of the shaft element 3 (substantially in the radial direction) and further in the axial direction through the opening of the oil guide bushing 8 in the direction of the here not shown phaser. Accordingly, the oil medium flowing along the first oil path P1 contacts an inner surface 8.2 of the oil guide sleeve 8 at least in sections.
- the second oil path P2 in the direction of the phaser essentially extends from the second oil guide element 7.1 along the outer wall or outer surface 8.3 of the oil guide sleeve 8 , in particular between the oil guide sleeve 8 and the inner surface 3.2 of the shaft element 3.
- the first oil path P1 and the second oil path P2 are spatially separated from each other.
- the camshaft segment 1 has a limiting element 9 which is incorporated within the camshaft 2, in particular within the shaft element 3 of the camshaft 2.
- the limiting element 9 is advantageously formed in the form of a plug and serves, for example, to prevent the oil medium from flowing off into an undesirable direction or region of the camshaft 2 or of the camshaft element 3.
- FIG. 2 schematically shows, in a lateral sectional illustration, a section of a further, in particular second embodiment of the camshaft segment 1 according to the invention.
- the camshaft segment 1 shown in FIG. 2 differs from the embodiment of the camshaft segment 1 shown in FIG. 1 in that the reduction element 10 is not completely enclosed or encased by the material of the camshaft bearing 5, in particular its oil transfer region. Rather, the reduction element 10 shown in the embodiment of FIG. 2 is arranged on the inner surface 5.1 of the camshaft bearing 5 such that the reduction element 10 only contacts the material of the camshaft bearing 5 on its outer surface 10.
- the inner surface 10.2 of the reduction element 10 does not contact the material of the camshaft bearing 5, that is exposed and advantageously serves as a running surface of the camshaft bearing 5, which at least temporarily is in contact with the camshaft 2, in particular the shaft element 3 of the camshaft 2.
- the reduction element 10 is not enclosed in the camshaft bearing during the production process of the camshaft bearing, as shown in the embodiment of FIG. 1, but instead the reduction element 10 is already connected to it produced camshaft bearing pressed or compressed. Accordingly, the camshaft bearing 5 and the reduction element 10 advantageously form an interference fit. In this case, it is also conceivable that the reduction element 10 has, for example, projections or holding regions in order to clamp corresponding regions of the camshaft bearing 10. In order to advantageously enable a trouble-free flow of the oil medium from the camshaft bearing 5 in the inner region of the shaft member 3 of the camshaft 2, it is therefore necessary the reduction element 10 has corresponding passage openings 20.
- passage openings 20 advantageously extend from the outer surface 10.1 to the inner surface 10.2 of the reduction element 10 through the wall thereof.
- the camshaft bearing 5, the reduction element 10 and the shaft element 3 of the camshaft 2 are arranged relative to one another such that the transfer elements 6, the passage openings 20 and the Olests institute 7 at least temporarily aligned with a rotation of the shaft member 3 about its central longitudinal axis L with each other in that a process-reliable transfer and transfer of the oil medium, starting from the camshaft bearing 5, into the inner region of the shaft element 3 of the camshaft 2 is made possible.
- at least two mutually spatially separated oil paths P1 and P2 are formed in the embodiment according to FIG.
- FIG. 3 shows a side sectional view of a section of a further, in particular third embodiment of the camshaft segment 1 according to the invention.
- the embodiment of the camshaft segment 1 according to the invention shown in FIG. 3 also has an end piece 16 which at least partially projects into an inner region of the shaft element 3 the camshaft 2 extends into and is arranged in particular in a distal region of the shaft element 3.
- the end piece 16 is advantageously a component of the camshaft 2.
- the camshaft 2 is advantageously mounted via the end piece 16, so that the camshaft bearing 5 is arranged in the region of the end piece 16.
- the reduction element 10 is advantageously completely enclosed or encased by the material of the camshaft bearing 5, in particular the oil transfer region of the camshaft bearing 5.
- the end piece 16 has corresponding Olestsetti 7 and 7.1, which advantageously in the form of a End Pacific begangsö réelle starting from an outer surface 16.1 an inner surface 16. 2 of the end piece 16 extend through a wall of the end piece 16.
- the Olensesetti 7 and 7.1 introduced in the end piece 16 are advantageously arranged in alignment with the oil transfer elements 6 or 6.1 of the camshaft bearing 5, so that trouble-free transfer of the oil medium starting from the camshaft bearing 5 via the ⁇ lübergabeele- elements 6, 6.1 and Olests institute 7, 7.1 in the inner region, in particular the cavity 17 of the end piece 16 can take place.
- both oil guide element 7 and 7.1 serve to form a single common oil path 1, which is within the Cavity 17 extends.
- the cavity 17 is also advantageous for receiving a central screw, not shown here.
- FIG. 4 is a schematic sectional side view of a section of another, in particular fourth, embodiment of the camshaft segment according to the invention
- the camshaft element 1 shown in FIG. 4 comprises a camshaft 2 consisting of a shaft element 3, which is in particular an outer shaft, advantageously a hollow shaft, and an inner shaft 1 1 on.
- a cam element 4, which is also referred to as a fixed cam element 4, for example, is rotationally connected to the outer shaft 3, while a further camshaft element 4.1, which may for example be referred to as Verstellnockenelement 4.1, rotationally connected to the inner shaft 1 1 via a corresponding connecting means 15 is.
- the connecting means 15 extends advantageously starting from the cam element 4.1 through an outer shaft bore 14 in the region of the inner shaft 1 1 in.
- the connecting means 15 extends completely through the inner shaft 1 1, in particular through an inner shaft bore 13 of the inner shaft 1 1.
- the inner shaft 1 1 extends coaxially with the outer shaft 3 at least in sections through it, wherein a gap 12 remains between the inner shaft 1 1 and the outer shaft 3 in order to avoid a friction between the inner shaft 1 1 and the outer shaft 3, in particular an outer surface of the inner shaft 1 1 and an inner surface of the outer shaft 3.
- a first oil path P1 by the oil medium is taken up by the oil guide element 7, starting from the oil transfer element 6 and into a cavity, in particular a bore of the inner shaft 1 1 is introduced.
- the inner shaft 1 1 has a substantially extending in the radial direction bore 1 1 .1, which opens at least partially in a substantially extending in the axial direction bore 1 1.2.
- the bore extending in the radial direction namely the radial bore 1 1.1, allows introduction of the oil medium starting from the oil guide element 7 into the interior of the inner shaft 1.
- the bore extending in the axial direction namely the axial bore 11 .2, permits a Takeover of the oil contained in the inner shaft 1 1 and a forwarding last Named to a not shown here phase splitter. As a result, a first oil path P1 is formed.
- seals 40 are arranged in the region of the gap 12 in such a way that the first oil transfer element 6 contacts the shaft element 3 transferred oil medium is transported only along a defined first oil path P1.
- the second oil path P2 is advantageously formed by means of a second oil guide element 7.1, which receives the oil medium from a second Olübergabeelement 6.2 and within a portion of the gap, that means in an area between the inner shaft 1 1 and the outer shaft 3, in particular an outer surface the inner shaft 1 1 and an inner surface 3.2 of the outer shaft 3 transports or directs.
- FIG. 5 shows in a lateral sectional illustration a section of a further, in particular fifth embodiment of a camshaft segment 1 according to the invention, which differs from the embodiment shown in FIG. 1 for example by the arrangement of two reduction elements 10 arranged at a distance from one another.
- These reduction elements 10 are advantageously designed in the form of a ring and are viewed in the axial direction spaced such that extends between these reduction elements 10 at least one Olübergabeelement 6, advantageously two oil transfer elements 6 and 6.1 in the direction of the shaft member 3 or extend.
- the oil transfer elements 6 and 6.1 in the form of a bore, in particular through hole configured.
- the shaft element 3 has a constriction 3.3 of the wall.
- This constriction 3.3 extends viewed in the axial direction at least in sections along the Wellenelementwandung such that the outer surface 3.1 of the shaft member 3 has a recess, wherein the inner surface 3.2 of the shaft member 3 has an increase.
- a constriction 3.3 of the shaft element 3 advantageously serves to form a defined distance between the outer surface 3.1 of the shaft element 3 and an inner surface 5.1 of the camshaft bearing 5.
- the constriction 3.3 is advantageously also formed in the region of the shaft element 3 in which the camshaft bearing 5, the camshaft 2, in particular the shaft member 3 of the camshaft 2 at least partially contacted to allow storage.
- a constriction 3.3 formed in this way promotes a play in the area of the camshaft bearing 5 between it and the camshaft 2, at least to obtain it.
- the constriction 3.3 favors a flow of the oil medium to be transferred to the shaft element 3 into the sections of the oil guide elements 7 and 7.1. This means that the oil medium consequently flows together in the region of the constriction 3.3 and unwanted flow along the outer surface 3.1 of the shaft element 3 is avoided.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015208693.3A DE102015208693A1 (en) | 2015-05-11 | 2015-05-11 | Camshaft segment with camshaft bearing |
PCT/EP2016/060023 WO2016180708A1 (en) | 2015-05-11 | 2016-05-04 | Camshaft segment with camshaft bearing |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3295000A1 true EP3295000A1 (en) | 2018-03-21 |
Family
ID=55910277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16720151.6A Withdrawn EP3295000A1 (en) | 2015-05-11 | 2016-05-04 | Camshaft segment with camshaft bearing |
Country Status (6)
Country | Link |
---|---|
US (1) | US20180087644A1 (en) |
EP (1) | EP3295000A1 (en) |
CN (1) | CN107580648A (en) |
DE (1) | DE102015208693A1 (en) |
MX (1) | MX2017013736A (en) |
WO (1) | WO2016180708A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102017104631A1 (en) | 2017-03-06 | 2018-09-06 | Thyssenkrupp Ag | Device and method for valve lift control and internal combustion engine |
DE102020209633A1 (en) * | 2020-07-30 | 2022-02-03 | Mahle International Gmbh | Process for producing an injection channel in a corrugated tube |
JP2022181004A (en) * | 2021-05-25 | 2022-12-07 | マツダ株式会社 | internal combustion engine |
DE102021213964A1 (en) | 2021-12-08 | 2023-06-15 | Mahle International Gmbh | Camshaft system and manufacturing process |
Family Cites Families (12)
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DE1425123A1 (en) * | 1962-11-20 | 1969-02-20 | Schmidt Gmbh Karl | Crankcase with cast steel rings |
GB1113623A (en) * | 1965-06-08 | 1968-05-15 | Schmidt Gmbh Karl | A bearing member for revolving journals |
US4908923A (en) * | 1988-10-05 | 1990-03-20 | Ford Motor Company | Method of dimensionally stabilizing interface between dissimilar metals in an internal combustion engine |
DE19958629B4 (en) * | 1999-12-04 | 2007-02-01 | Dr.Ing.H.C. F. Porsche Ag | Device for changing the timing of an internal combustion engine |
US6971354B1 (en) * | 2004-12-20 | 2005-12-06 | Borgwarner Inc. | Variable camshaft timing system with remotely located control system |
DE102006028611B4 (en) * | 2006-06-22 | 2014-12-31 | Mahle International Gmbh | Adjustable camshaft |
DE102007003966A1 (en) * | 2007-01-26 | 2008-07-31 | Schaeffler Kg | Raumnockentrieb with an improved balance of the valve lift |
DE102009053046A1 (en) * | 2009-11-16 | 2011-05-19 | Mahle International Gmbh | Cam or bearing ring for cam shaft in internal combustion engine, has diamond like carbon layer at bearing ring surface, where layer is formed by physical vapor deposition method or plasma assisted chemical vapor deposition method |
DE102012206500A1 (en) * | 2012-04-19 | 2013-10-24 | Mahle International Gmbh | Internal combustion engine |
DE102013207573A1 (en) * | 2013-04-25 | 2014-10-30 | Mahle International Gmbh | Bearing frame or cylinder head cover |
DE102014106925B4 (en) * | 2014-05-16 | 2017-05-11 | Thyssenkrupp Presta Teccenter Ag | Bearing bridge for the bearing of a camshaft |
DE102014108879A1 (en) * | 2014-06-25 | 2016-01-14 | Thyssenkrupp Presta Teccenter Ag | Hybrid bearing block for a camshaft |
-
2015
- 2015-05-11 DE DE102015208693.3A patent/DE102015208693A1/en not_active Ceased
-
2016
- 2016-05-04 MX MX2017013736A patent/MX2017013736A/en unknown
- 2016-05-04 US US15/573,213 patent/US20180087644A1/en not_active Abandoned
- 2016-05-04 CN CN201680027073.7A patent/CN107580648A/en active Pending
- 2016-05-04 WO PCT/EP2016/060023 patent/WO2016180708A1/en active Application Filing
- 2016-05-04 EP EP16720151.6A patent/EP3295000A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
US20180087644A1 (en) | 2018-03-29 |
CN107580648A (en) | 2018-01-12 |
DE102015208693A1 (en) | 2016-11-17 |
MX2017013736A (en) | 2018-08-01 |
WO2016180708A1 (en) | 2016-11-17 |
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