Camshaft Making Patents (Class 29/888.1)
-
Patent number: 8677620Abstract: A method for the linking of components to hollow shafts, preferably for producing camshafts, is disclosed where the components, especially cam rings, are manufactured so as to generate their function-related contour, that either a hardenable material is used for this purpose which, aside from its elastic deformability, after hardening still has a permissible plastic deformability of minor extent; or that subsequently the surface of the components, particularly the contact face of the cams, is subjected to a surface-hardening process. These components together with the hollow shaft to be deformed are placed into an IHPF tool in a manner to suit the respective function, and that in a second process step through the application of the IHPF process and due to the internal pressure exerted the components are joined to the hollow shaft in a force- and form-closing manner.Type: GrantFiled: June 13, 2011Date of Patent: March 25, 2014Inventor: Bodo Furchheim
-
Patent number: 8662043Abstract: The present invention relates to an assembled shaft element, in particular an assembled camshaft for valve-controlled internal combustion engines, wherein a hub body having at least one functional part, in particular at least one cam, is held on a shaft by a formfit connection using a splined tooth system in the circumferential direction, wherein the splined tooth system includes shaft splines formed on the shaft and interacting with hub body splines formed in a hub body recess. According to the invention, the at least one hub body (14) is held in addition to the circumferential formfit connection by an interference fit on the shaft (12) implemented by a press fit between a tooth circle of the shaft splines (22) and a root circle of the hub body splines (26). The invention further relates to a method for producing an assembled camshaft for valve-controlled internal combustion engines.Type: GrantFiled: June 8, 2010Date of Patent: March 4, 2014Assignee: Audi AGInventors: Peter Dollinger, Thomas Schimmer
-
Publication number: 20140033998Abstract: Various exemplary illustrations of a camshaft assembly for actuating valves of an engine are disclosed. The camshaft assembly may include a camshaft having a plurality of lobes, including at least one phase adjustable lobe configured to be selectively rotated with respect to the camshaft. The assembly may further include a hydraulic valve actuator in communication with a first lobe of the camshaft. The hydraulic valve actuator may be configured to selectively actuate at least one valve in communication with the hydraulic valve actuator in response to the at least one cam lobe.Type: ApplicationFiled: August 5, 2013Publication date: February 6, 2014Inventors: Luke Brodbeck, Falk Schneider, Thomas Flender, Antonio Menonna, Michael Kreisig
-
Patent number: 8631776Abstract: An assembled camshaft includes an outer hollow camshaft body and an inner camshaft body disposed within the outer hollow camshaft body and mounted so as to rotate relative to it by a predetermined angle. The camshaft also includes at least two separate cam elements. A first cam element is connected with the inner camshaft body so as to rotate with it, and is disposed so as to rotate relative to the outer hollow camshaft body. A second cam element has at least two partial cam elements, in such a manner that a first partial cam element is disposed on the outer hollow camshaft body, so as to rotate with it, and a second partial cam element is connected with the inner camshaft body, so as to rotate with it, and is disposed so that it can be rotated relative to the outer hollow camshaft body.Type: GrantFiled: June 10, 2011Date of Patent: January 21, 2014Assignee: ThyssenKrupp Presta TecCenter AGInventors: Uwe Dietel, Uwe Grossgebauer, Jonathan Heywood, Bernd Mann
-
Patent number: 8627795Abstract: A camshaft arrangement (1) for changing the relative angle position of at least one cam of a camshaft (2) relative to a second cam of the camshaft (2), wherein the arrangement includes an angular adjustment device (3) having a stator (4) and a rotor (5) which is arranged such that it can be rotated relative thereto. The rotor (5) is connected to a shaft (6) in a rotationally fixed manner, the stator (4) is connected to a hollow shaft (7) in a rotationally fixed manner, and the shaft (6) and the hollow shaft (7) are arranged concentrically to one another. The at least one first cam is connected to the shaft (6) in a rotationally fixed manner and the at least one second cam is connected to the hollow shaft (7) in a rotationally fixed manner.Type: GrantFiled: October 4, 2010Date of Patent: January 14, 2014Assignee: Schaeffler Technologies AG & Co. KGInventors: Matthias Kapp, Craig Dupuis, Inhwa Chung
-
Publication number: 20140007428Abstract: A heating device for heating a hollow component may include at least one inner induction coil and at least one outer induction coil, each configured to be heated. At least one element may be configured to influence a magnetic field formed between the inner and the outer induction coil during the operation of the heating device. The element may be arranged between the inner and the outer induction coils. Regions of the hollow component may be thinner and the thinner regions may be configured to heat more quickly than the remaining thicker regions. The thinner and thicker regions of the component may allow even heating of the component to be achieved.Type: ApplicationFiled: December 7, 2011Publication date: January 9, 2014Applicant: Mahle International GmbHInventors: Christoph Beerens, Antonio Menonna, Almir Zahirovic
-
Publication number: 20140007828Abstract: A camshaft assembly, comprising a camshaft (2) having a receiving space (6) in an interior thereof, at least some sections of the assembly being made of a magnetisable material, and an electromagnetic actuating unit (4) for actuating an actuating partner (5), comprising a control valve of a camshaft adjuster (3), a coil winding (8) and an armature (7) for cooperating with the actuating partner (5), the armature being adjustable by energizing the coil winding (8).Type: ApplicationFiled: March 12, 2012Publication date: January 9, 2014Applicant: ETO MAGNETIC GMBHInventors: Stefan Bender, Thomas Schiepp
-
Patent number: 8596238Abstract: A valve train includes a a plurality of individual cam sleeves axially displaceable relative to one another and disposed so as to form the camshaft, each of the plurality of individual cam sleeves including a plurality of different cam profiles each having a same base circle portion and being configured to engage, by switching, one of a plurality of gas exchange valves. A switching shaft is disposed inside the plurality of cam sleeves and configured to rotate together with the plurality of cam sleeves. An encircling switching contour is disposed inside each of the plurality of cam sleeves. A switching pin operatively connects one of the plurality of cam sleeves to the switching shaft, the switching pin configured to slide in the encircling switching contour. An actuator is operatively connected to the switching shaft so as to rotate the switching shaft relative to the plurality of cam sleeves.Type: GrantFiled: August 3, 2010Date of Patent: December 3, 2013Assignee: IAV GmbH Ingenieurgesellschaft Auto und VerkehrInventors: Andreas Werler, Thomas Arnold, Heiko Neukirchner, Joerg Wutzler
-
Patent number: 8596237Abstract: An internal combustion piston engine having gas exchange valves actuated by cams of a camshaft. The cams are sliding cams having two cams per sliding cam unit situated on a basic shaft in rotationally fixed fashion but axially displaceable. At least one actuator unit has two actuator pins for displacing the sliding cam units into different axial positions using displacement grooves on the circumference of the sliding cam units, the grooves being helical and situated mirror-symmetrically, and having an ejection ramp for the actuator pins. The actuator pins are spring-loaded toward the sliding cam unit and, in retracted positions, can be fixed by arresting devices, which have control needles that correspond to clamping bodies of locking devices. These needles are actuatable by an electromagnet unit, with the control needles being connected with a needle bridge. A pin engages the needle bridge, and the pin is controlled by the electromagnet unit.Type: GrantFiled: June 21, 2012Date of Patent: December 3, 2013Assignee: Schaeffler Technologies AG & Co. KGInventors: Oliver Popp, Ronny Gunnel
-
Publication number: 20130305532Abstract: The invention relates to a method for producing a tubular structural part by means of hydroforming. An assigned end of a supporting tube (1) is inserted into an opening in an end piece (2) and then widened by a pressurized fluid being applied to it and is connected to the end piece (2) with a press fit. The opening (9) has a first portion (10a) with a first inner cross section, which is greater than the outer cross section of the assigned end of the supporting tube (1). According to the invention, the first portion (10a) is adjoined by a second portion (10b), in a step-shaped manner so as to form an edge (11). The inner cross section of the second portion (10b) is smaller than the outer cross section of the assigned end of the supporting tube (1). In the method according to the invention, the supporting tube (1) is first inserted with its corresponding end into the first portion (10a), before the edge (11) cuts into the material of the supporting tube (1) in a further pushing-in movement.Type: ApplicationFiled: November 17, 2011Publication date: November 21, 2013Inventors: Rico Demuth, Jens Gentzen, Juergen Meusel, Alexander Paul, Daniel Paul, Robert Reichelt, Frank Schieck
-
Patent number: 8584639Abstract: A valve drive of an internal combustion engine is provided, having a camshaft (1) which includes a carrier shaft (2) and a cam part (3), which is arranged thereon in a rotationally fixed manner and displaceable between two axial positions and which has at least one cam group of directly adjoining cams (5, 6) having different cam elevations and an axial gate (8) having two cam tracks (9, 10) that extend axially along the circumference in opposing directions, and further having an actuating element (11) that can be coupled to the axial gate for displacing the cam part in the direction of both cam tracks. The cam tracks are arranged one behind the other in the circumferential direction of the axial gate (8).Type: GrantFiled: February 1, 2010Date of Patent: November 19, 2013Assignee: Schaeffler Technologies AG & Co. KGInventors: Harald Elendt, Lars Pfutzenreuter, Detlef Axmacher, Andreas Nendel, Markus Schnepp, Mathias Boegershausen, Heiko Schmidt
-
Patent number: 8584641Abstract: A deactivating cam system (1) for a valve train (1a) of an internal combustion engine is provided having a camshaft (2) on which at least one cam (3) is seated for rotation but fixed in axial direction while being able to be connected through a coupling device (4) rotationally fast to the camshaft (2). The coupling device (4) has a ball detent mechanism (5) which is arranged within the cam (3) and whose balls (6) are seated within radial pockets (7) of the cam (3).Type: GrantFiled: June 17, 2010Date of Patent: November 19, 2013Assignee: Schaeffler Technologies AG & Co. KGInventor: Jeffrey Shewell
-
Publication number: 20130284129Abstract: A valve housing for a control valve of a camshaft adjuster, including a housing flange for fastening to a control unit as well as an essentially cylindrical housing component for accommodating a control piston. It is provided that the housing component is rotatably fixedly attached to the housing flange by a form-locked connection. A valve housing of this type is cost effective to manufacture and has a low weight, while ensuring operational reliability. The invention furthermore relates to a method for manufacturing an aforementioned valve housing.Type: ApplicationFiled: August 23, 2011Publication date: October 31, 2013Applicant: Schaeffler Technologies AG & Co. KGInventors: Phillipp Bittel, Stefan Foerst, Markus Weiss, Josef Groeschel
-
Patent number: 8567361Abstract: A valve drive for an internal combustion engine, wherein in order to activate gas exchange valves at least one camshaft having at least one sliding cam which can be displaced axially on the camshaft is provided, wherein the respective sliding cam has a sliding block section with a plurality of grooves which are formed on an outer lateral face and are positioned one behind the other on the circumference, wherein in order to bring about displacement of the respective sliding cam an actuator is provided with a first pin for displacement in the two directions about a first axial segment and a second pin for displacement in the two directions about a second axial segment. The sliding block section is manufactured in certain sections from a material with a relatively high electrical conductivity and in certain sections from a material with a relatively low electrical conductivity.Type: GrantFiled: March 5, 2012Date of Patent: October 29, 2013Assignee: Dr. Ing. h.c. F. Porsche AktiengesellschaftInventor: Joachim Grüberger
-
Publication number: 20130269664Abstract: An exhaust gas recirculation (EGR) valve with improved space efficiency, improved stability, and maximized driving force and a method of manufacturing cam thereof. The EGR includes a housing, a drive motor, and a power transmission unit connected to the drive motor to transmit power generated by the drive motor. The power transmission unit includes gears, a rotary shaft connected to one of the gears constituting the power transmission unit, an actuating cam connected to the rotary shaft to move in a rotational direction thereof, the actuating cam having a guide groove formed therein, and a valve member operatively connected to the actuating cam to selectively open and close an exhaust gas flow channel in the housing according to operation of the actuating cam. One end of the valve member contacts a top of the guide groove such that the valve member is operated simultaneously when the actuating cam rotates.Type: ApplicationFiled: April 11, 2013Publication date: October 17, 2013Applicant: KAMTEC INC.Inventors: Chan Woo PARK, Ki Ho JUNG, Jung Suek KOO
-
Patent number: 8534252Abstract: A camshaft may include a first shaft, a first lobe member, and a second lobe member. The first shaft may include an annular wall defining a first bore. The wall may include a first portion having a first radial outer surface and a second portion having a second radial outer surface that is radially offset relative to the first radial outer surface. The first lobe member may define a second bore having the first portion of the first shaft located therein and frictionally engaged with the first shaft for rotation with the first shaft. The second lobe member may define a third bore having the second portion of the first shaft located therein. The second lobe member may be rotatably disposed on the second portion of the first shaft.Type: GrantFiled: January 5, 2011Date of Patent: September 17, 2013Inventors: Glenn E. Clever, Frederick J. Rozario, Shekhar G. Wakade, Joseph E. Robbins
-
Publication number: 20130220068Abstract: A method for producing a functional shaft is provided in which a functional element which is provided with a pocket is inserted into a retaining element, a shaft is inserted into the pocket, and a force applied to the functional element while the shaft is being inserted into the pocket is measured. A device for producing a functional shaft and to a functional shaft produced in accordance with the method is also provided.Type: ApplicationFiled: April 12, 2013Publication date: August 29, 2013Applicant: Neumayer Tekfor Holding GmbHInventor: Neumayer Tekfor Holding GmbH
-
Patent number: 8516982Abstract: A camshaft phaser includes a housing with a harmonic gear drive unit disposed therein. The harmonic gear drive unit includes a circular spline and a dynamic spline, a flexspline disposed radially within the circular spline and the dynamic spline, a wave generator disposed radially within the flexspline, and a rotational actuator connectable to the wave generator. One of the circular spline and the dynamic spline is fixed to the housing. A hub is rotatably disposed radially within the housing and attachable to the camshaft and fixed to the other of the circular spline and the dynamic spline. An anti-rotation means is provided for temporarily fixing the circular spline to the dynamic spline in order to prevent relative rotation therebetween when the hub is being attached to the camshaft. The anti-rotation means prevents damage to the harmonic gear drive unit while the camshaft phaser is being installed onto the camshaft.Type: GrantFiled: June 29, 2010Date of Patent: August 27, 2013Assignee: Delphi Technologies, Inc.Inventors: Pascal David, Pierre Kimus, Michael James Fox
-
Patent number: 8510942Abstract: An automotive engine component and method of producing the same. The method uses dynamic magnetic compaction to form components, such as camshaft lobes, with non-axisymmetric and related irregular shapes. A die is used that has an interior profile that is substantially similar to the non-axisymmetric exterior of the component to be formed such that first and second materials can be placed into the die prior to compaction. The first material is in powder form and can be placed in the die to make up a first portion of the component being formed, while a second material can be placed in the die to make up a second portion of the component. The second material, which may possess different tribological properties from those of the first material, can be arranged in the die so that upon formation, at least a portion of the component's non-axisymmetric exterior profile is shaped by or includes the second material.Type: GrantFiled: October 8, 2008Date of Patent: August 20, 2013Assignee: GM Global Technology Operations LLCInventors: Shekhar G. Wakade, Frederick J. Rozario, Glenn E. Clever, Joseph E. Robbins, Stephen R. Kornblum
-
Patent number: 8499448Abstract: The invention relates to a method of producing a composite shaft comprising a shaft body (1), at least one first component (2, 9) connected to the shaft body (1) in a rotationally fixed manner, and at least one second component (3, 8) rotatable relative to the shaft body (1), in which method the at least one first component (2, 9) and the at least one second component (3, 8) are pushed onto the shaft body and assembled in the intended sequence.Type: GrantFiled: February 21, 2007Date of Patent: August 6, 2013Assignee: ThyssenKrupp Presta TecCenter AGInventors: Thomas Binder, Ignaz Klaus Teppan
-
Patent number: 8474136Abstract: A method of fabricating a camshaft including at least one carrier unit and at least one functional element. The carrier unit is produced at least in part from at least one first blank by way of at least one first machining method, and the functional element is produced at least in part from at least one second blank by way of at least one second machining method. The invention further relates to a camshaft produced by the method of the invention.Type: GrantFiled: December 9, 2011Date of Patent: July 2, 2013Assignee: Neumayer Tekfor Holding GmbHInventors: Matthias Bechtold, Christian Fuchs, Johannes Tisch
-
Patent number: 8459220Abstract: A novel concentric phaser camshaft comprises valve actuating lobes that are arranged into lobe structures. The valve actuating lobes to be affixed to an inner camshaft member, are arranged in pinned structures comprising adjacent pairs of lobes which are affixed to the inner camshaft member by pins. The valve actuating lobes to be affixed to the outer camshaft member by an interference fit are arranged into lobe structures comprising a bearing journal and at least one lobe, each lobe structure including an index feature operable to engage a jig to angularly position the lobe structure on the outer camshaft member while the interference fit is established.Type: GrantFiled: October 14, 2008Date of Patent: June 11, 2013Assignee: Magna Powertrain Inc.Inventor: Paolo J. Comello
-
Patent number: 8458902Abstract: The present invention relates to a method of forming a cam shaft by assembling a preliminary shaft having a predetermined outer diameter and a cam lobe including a cam-lobe shaft hole having a diameter larger than the outer diameter of the preliminary shaft.Type: GrantFiled: December 11, 2008Date of Patent: June 11, 2013Assignee: Musashi Seimitsu Industry Co., Ltd.Inventors: Akira Mataga, Tomoyuki Fujita
-
Publication number: 20130133474Abstract: A method for joining structural elements onto a shaft may include generating at least one projection at a respective joining position on the shaft, sliding at least one of the structural elements over at least one projection and maintaining the structural elements in at least on projection.Type: ApplicationFiled: November 26, 2012Publication date: May 30, 2013Applicant: MAHLE INTERNATIONAL GMBHInventor: MAHLE INTERNATIONAL GMBH
-
Publication number: 20130133195Abstract: A shaft, such as a camshaft for use in the internal combustion engine of a motor vehicle, in which the shaft includes a basic shaft body, a plurality of functional bodies, such as cams, mounted in axially spaced positions on the basic shaft body, and at least one balancing element mounted on the basic shaft body, in which the at least one balancing element is produced separately from the basic shaft body and from the functional bodies, and the functional bodies and the at least one balancing element are subsequently mounted on said basic shaft body, for example, by axial press fitting.Type: ApplicationFiled: January 22, 2013Publication date: May 30, 2013Applicant: NEUMAYER TEKFOR HOLDING GmbHInventor: NEUMAYER TEKFOR HOLDING GmbH
-
Patent number: 8443499Abstract: A method of assembling a camshaft may include locating a first lobe member of the camshaft on a first shaft and inserting a locking pin into a first bore in the first lobe member and into a second bore in the first shaft. The locking pin may include a first recess extending into a first end thereof defining a first annular wall. A first retaining member may be forced into a first recess. The forcing may displace the annular wall in an outward radial direction and into a frictional engagement with the first bore.Type: GrantFiled: March 3, 2009Date of Patent: May 21, 2013Inventors: Glenn E. Clever, Roy Glenn Kaywood, Ronald Hendrick
-
Patent number: 8434438Abstract: A camshaft adjuster for an internal combustion engine of a motor vehicle, including a stator which can be driven by a crankshaft of an internal combustion engine and is located radially on the outside, a rotor which is non-rotatably connected to a camshaft and located radially on the inside, working chambers which are disposed between the rotor and stator and can be subjected to a pressure such that the rotational position of the rotor relative to the stator can be varied, and at least one sealing cover which laterally delimits the working chambers and rests against the stator and/or rotor. The sealing cover, stator and/or rotor have a convex, concave or conical contact surface, and the sealing cover can be elastically deformed by the attachment via the contact surface such that it rests against the stator and/or rotor with an increased sealing force as a result of elastic deformation.Type: GrantFiled: June 5, 2009Date of Patent: May 7, 2013Assignee: Schaeffler Technologies AG & Co. KGInventors: Juergen Weber, Markus Koerber
-
Patent number: 8418666Abstract: A camshaft assembly may include a monolithic camshaft body, a journal member and a thrust ring. The monolithic camshaft body may define lobes and journal regions along an axial extent thereof. The journal member may be separate from and fixed to an axial end of the camshaft body adjacent an end lobe of the camshaft body. The thrust ring may be axially secured to the camshaft assembly at the axial end of the camshaft body.Type: GrantFiled: January 14, 2010Date of Patent: April 16, 2013Inventors: Dominique T. Lester, Rodney E. Baker, Alan W. Hayman
-
Patent number: 8418667Abstract: A valve train of an internal combustion engine with a camshaft (1) that has a carrier shaft (2) and a cam part (3) that is locked on rotation on the carrier shaft and is arranged displaceable in the axial direction and has at least one cam group (4a to 4c, 5a to 5c) of different elevations for variable actuation of a gas-exchange valve and a groove-shaped axial connecting link (10) with two connecting-link paths (11, 12) crossing its periphery, and with two actuation pins (13, 14) that can be coupled in the connecting-link paths for displacement of the cam part in the direction of the two connecting-link paths.Type: GrantFiled: June 23, 2011Date of Patent: April 16, 2013Assignee: Schaeffler Technologies AG & Co. KGInventor: Andreas Nendel
-
Patent number: 8402650Abstract: A method for producing a built-up cam shaft and a built-up cam shaft having a shaft are provided. A functional component is produced in a separate manufacturing process and has an internal orifice to receive the shaft. The orifice in the functional component is substantially round to receive the shaft, and an insertion mechanism is provided on the raised areas and/or at the orifice in the functional component, which allow the functional component to be pushed onto the raised areas substantially without shavings being produced. The raised areas partially dig into the orifice and in so doing connect the functional component to the shaft in a non-positive and positive manner substantially by deformation of the material of the functional component in the region of the orifice in the functional component.Type: GrantFiled: May 23, 2006Date of Patent: March 26, 2013Assignee: Thyssenkrupp Presta TecCenter AGInventor: Oskar Mueller
-
Patent number: 8381615Abstract: A shaft, such as a camshaft for use in the internal combustion engine of a motor vehicle, in which the shaft includes a basic shaft body, a plurality of functional bodies, such as cams, mounted in axially spaced positions on the basic shaft body, and at least one balancing element mounted on the basic shaft body, in which the at least one balancing element is produced separately from the basic shaft body and from the functional bodies, and the functional bodies and the at least one balancing element are subsequently mounted on said basic shaft body, for example, by axial press fitting.Type: GrantFiled: February 5, 2008Date of Patent: February 26, 2013Assignee: Neumayer Tekfor Holding GmbHInventors: Manfred Vogel, Matthias Derse, Matthias Bechtold, Thomas Winkler
-
Patent number: 8375580Abstract: A method for manufacturing cams for composite camshafts with the steps hot-forming a cam 11 such that a cam outside contour is produced and a cam bore 13 is punched and axially and radially calibrating the cam 11, wherein the calibration comprises the steps inserting the cam into an undivided mold 21 that defines the calibrated cam outside contour 12, inserting an arbor 23 into the cam bore 13 that defines the calibrated cam bore 13, and axially shortening the cam 11 between a lower die 22 that is situated between the mold 21 and the arbor 23 and on which the cam 11 lies with a first end face 14 and an upper die 25 that is guided between the mold 21 and the arbor 23 and acts upon the second end face 15 of the cam 11.Type: GrantFiled: June 5, 2008Date of Patent: February 19, 2013Assignee: Muhr und Bender KGInventors: Rudolf Bonse, Jürgen Schellbach, Jochen Wolf
-
Patent number: 8371029Abstract: The present invention provides a production apparatus for crankshaft, including: a die which has a lower die, an upper die, and plural side forming punches, the upper die being provided movably to the lower die, the side forming punches moving perpendicularly to a movement direction of the upper die; a press ram which moves the upper die to the lower die, closes a material of the crankshaft, and forms the material; cam mechanisms which are provided for the side forming punches and which move the side forming punches to an inside portion of the die in accordance with movement of the press ram; a grade separation structure which is provided to at least one of the side forming punches in order to prevent interference of the side forming punches with each other.Type: GrantFiled: March 25, 2010Date of Patent: February 12, 2013Assignees: Honda Motor Co., Ltd., Nichidai CorporationInventors: Yasuhiro Ito, Takayuki Ohnuma, Tsutomu Ando, Yasuyuki Kondo
-
Patent number: 8365693Abstract: A camshaft assembly is disclosed which comprises an inner shaft (12), an outer tube (14) surrounding and rotatable relative to the inner shaft (12), and two groups of cam lobes mounted on the outer tube, the first group of cam lobes being fast in rotation with the outer tube, and each cam (10) lobe (18) of the second group being rotatably mounted on the outer surface of the tube (14) and connected for rotation with the inner shaft (12) by means of one or more drive members (50) passing through circumferentially elongated slots in the outer tube. In the invention, each drive member comprises a (15) drive component (50d) engaged with fixed alignment in the cam lobe (18) and a separate fastener (50b) that is rotatable to clamp the drive component against a flat surface on the inner shaft (12), each drive member (50) being constructed such that during the tightening of the fastener (50b) no relative (20) sliding movement is required at the interface between the drive component (50d) and the inner shaft (12).Type: GrantFiled: December 18, 2008Date of Patent: February 5, 2013Assignee: Mechadyne PLCInventors: Timothy Mark Lancefield, Nicholas James Lawrence, Ian Methley, Richard Alwyn Owen
-
Publication number: 20130019823Abstract: The invention relates to a camshaft for an internal combustion engine with a shaft and at least one cam joined therewith, which is connected via a joining surface on the cam side with a joining surface on the shaft side. The joining surface on the cam side and alternatively or additionally the joining surface on the shaft side may be constructed such that they have a predefined roughness. Hereby, the friction between the shaft and the cam can be increased. The invention further relates to a cam for such a camshaft and a method for the manufacture of such a camshaft or respectively of such a cam.Type: ApplicationFiled: July 18, 2012Publication date: January 24, 2013Inventors: Antonio Menonna, Falk Schneider, Stefan Steichele
-
Publication number: 20130014714Abstract: A camshaft assembly may include a assembly and a shaft. The cam assembly may include a hollow structure with an interior surface and an exterior surface. A plurality of projections may be located on the exterior surface of the hollow structure. The interior surface of the cam assembly may define a recess axially aligned with at least one of the plurality of projections. At least one of the plurality of projections may define an undercut portion. The cam assembly may be coupled with the shaft.Type: ApplicationFiled: September 19, 2012Publication date: January 17, 2013Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventor: GM GLOBAL TECHNOLOGY OPERATIONS LLC
-
Patent number: 8342146Abstract: A camshaft assembly, particularly for use in an internal combustion engine, having a shaft base body and a plurality of cam parts. In order to be able to selectively shut down individual cylinders, cam parts are provided with cams which are arranged so as to be rotationally fixed and axially displaceable in relation to the shaft base body. Depending on a desired sequence of axially fixed and axially displaceable cam parts, it is proposed to arrange the axially displaceable cam parts on a longitudinally extending profile in an axially displaceable manner and to push the axially fixed cam parts—insofar as these are necesary—over or across the receiving area for the axially displaceable cam parts and to secure them to the shaft.Type: GrantFiled: October 29, 2009Date of Patent: January 1, 2013Assignee: Neumayer Tekfor Holding GmbHInventors: Markus Schuler, Renald Kuempel
-
Publication number: 20120279467Abstract: A camshaft that is assembled or is to be assembled carries at least one cam element that is to be disposed on a main camshaft body to be rotationally fixed and axially movable, and at least one cam element to be disposed on the main camshaft body so as to be rotationally fixed and axially immovable. The main camshaft body has first axial sub-sections having a multi-tooth profile, so that due to a positive connection between shaft and hub the cam element to be disposed in the sub-section so as to be axially movable is seated so as to be rotationally fixed. The main camshaft body also has second axial sub-sections having an extended diameter so that by a non-positive connection between shaft and hub it is ensured that the cam element to be disposed in the sub-section is seated so as to be rotationally fixed and secured against movement.Type: ApplicationFiled: November 11, 2010Publication date: November 8, 2012Applicant: ThyssenKrupp Presta TecCenter AGInventors: Guido Scherzinger, Manfred Muster
-
Patent number: 8291877Abstract: In a valve drive arrangement for an internal combustion engine including a camshaft carrying axially movable cam elements provided with cams for operating gas exchange valves of the internal combustion engine and an actuation device having at least one shift element which is provided to shift cam element by means of a shifting gate between opposite axial positions, the valve drive arrangement has a change-over device for changing the axial shift direction of the shift element from one to the opposite axial position.Type: GrantFiled: May 21, 2010Date of Patent: October 23, 2012Assignee: Daimler AGInventors: Jens Meintschel, Thomas Stolk, Alexander Von Gaisberg-Helfenberg
-
Publication number: 20120255170Abstract: The instant invention relates to a cam shaft for internal combustion engines of motor vehicles, which is supported on a cylinder head housing via at least one roller bearing, wherein provision is made for at least one thrust bearing, which supports the cam shaft in axial direction and which is embodied as ball or also as roller bearing.Type: ApplicationFiled: June 12, 2012Publication date: October 11, 2012Inventors: Thomas Flender, Michael Kreisig, Falk Schneider
-
Patent number: 8272359Abstract: A camshaft assembly may include a assembly and a shaft. The cam assembly may include a hollow structure with an interior surface and an exterior surface. A plurality of projections may be located on the exterior surface of the hollow structure. The interior surface of the cam assembly may define a recess axially aligned with at least one of the plurality of projections. At least one of the plurality of projections may define an undercut portion. The cam assembly may be coupled with the shaft.Type: GrantFiled: March 10, 2010Date of Patent: September 25, 2012Assignee: GM Global Technology Operations LLCInventors: Rodney K. Elnick, Glenn E. Clever, Shekhar G. Wakade
-
Patent number: 8230833Abstract: A valve train for an internal combustion engine for actuating gas exchange valves includes a camshaft in the form of a camshaft tube driven by a crankshaft of the internal combustion engine. A selector shaft is disposed in the camshaft tube. A surface of the selector shaft includes a shifting contour having an axial gradient. At least one cam carrier is disposed on the camshaft and axially displaceable but rotationally fixed with respect to the camshaft. Each cam carrier includes an identical base-circle portion and a plurality of cam profiles. A rotationally fixed but axially displaceable shifting sleeve is disposed between the camshaft tube and the rotatable selector shaft of each cam carrier. Each shifting sleeve includes a hole. A shilling ball is disposed in the hole of each shifting sleeve. The shifting ball is coupled with the shifting contour of the selector shaft so as to be guided by the selector shaft so as to axially displace the shifting sleeve by rotation of the selector shaft.Type: GrantFiled: March 18, 2010Date of Patent: July 31, 2012Assignee: IAV GmbH Ingenieurgesellschaft Auto und VerkehrInventors: Andreas Werler, Thomas Arnold
-
Publication number: 20120160055Abstract: In a dual camshaft structure, an inner shaft provided with a variable cam is inserted into an outer shaft provided with a secured cam. In the dual camshaft structure, the secured cam is provided on a first cylindrical member, the first cylindrical member is secured to the outside of the outer shaft, the variable cam is provided on the second cylindrical member, and the second cylindrical member is installed at the outside of the first cylindrical member and is secured to the inner shaft by a connection member via a notch provided on the first cylindrical member and a notch provided on the outer shaft. Therefore, the rigidity of the dual camshaft structure can be ensured, and a slidable surface of a cam rotatable at the outside of the outer shaft can be held.Type: ApplicationFiled: December 28, 2010Publication date: June 28, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Manabu Tateno
-
Publication number: 20120111139Abstract: A camshaft comprising a carrier element and at least one cam in which the carrier element is comprised of at least two carrier sections, and a method of manufacturing such a camshaft.Type: ApplicationFiled: January 19, 2012Publication date: May 10, 2012Applicant: Neumayer Tekfor Holding GmbHInventors: Johannes TISCH, Markus Schuler
-
Publication number: 20120103130Abstract: A method of fabricating a camshaft including at least one carrier unit and at least one functional element. The carrier unit is produced at least in part from at least one first blank by way of at least one first machining method, and the functional element is produced at least in part from at least one second blank by way of at least one second machining method. The invention further relates to a camshaft produced by the method of the invention.Type: ApplicationFiled: December 9, 2011Publication date: May 3, 2012Applicant: Neumayer Tekfor Holding GmbHInventors: Matthias Bechtold, Christian Fuchs, Johannes Tisch
-
Patent number: 8161930Abstract: A camshaft (1) is provided for a stroke-variable valve drive of an internal combustion engine with a carrier shaft (2) and a cam part (3) that is arranged locked in rotation and movable in the axial direction on the carrier shaft and that is assembled from a cam carrier (4) and a sleeve (5). The cam carrier has a cam group (7, 8) of directly adjacent cams (9, 10, 11, 12) with different cam strokes and an adapter end (6) on which the sleeve is mounted. The sleeve has a setting groove (17) in the form of a groove that extends across an extent of the sleeve and that is used for the specification of an axial setting groove track for an activation pin (18) moving the cam part on the carrier shaft. The setting groove is produced in the sleeve through non-metal-cutting shaping of sheet-metal material.Type: GrantFiled: November 2, 2009Date of Patent: April 24, 2012Assignee: Schaffler Technologies AG & Co. KGInventors: Harald Elendt, Andreas Nendel
-
Patent number: 8156910Abstract: A camshaft assembly method may include locating a first lobe member of a camshaft assembly on a first shaft of the assembly. A locking pin may be inserted into a first radial bore in the first lobe member and a second radial bore of the first shaft. The locking pin may have an annular wall defining a pin bore extending from a first end of the locking pin to a second end of the locking pin. A deforming member may be forced into the pin bore to displace the annular wall in an outward radial direction and into a frictional engagement with the first radial bore. The forcing may include a deforming member entering the pin bore at the first end of the locking pin and exiting the pin bore at the second end of the locking pin.Type: GrantFiled: February 20, 2009Date of Patent: April 17, 2012Inventors: Glenn E. Clever, Roy Glenn Kaywood, Ronald Hendrick
-
Publication number: 20120073533Abstract: A camshaft device (10) includes a camshaft (11) onto which a cam (18) is fitted; a plurality of rolling bearings (12) that are fitted at intervals in an axial direction onto this camshaft (11); and a support frame (13) that is mounted on a cylinder head (15) of an engine, and that has a plurality of bearing holes (25) which are formed on the same axis and into which the rolling bearings (12) fitted, and that rotatably supports the camshaft (11) via the rolling bearings (12) that are fitted into the bearing holes (25). The support frame (13) is formed by connecting a plurality of split bodies (27), (28) together, and the plurality of split bodies (27), (28) includes a first split body (27) on which a plurality of first concave portions (29) that form half of the bearing holes (25) is integrally formed, and a second split body (28) on which a plurality of second concave portions (30) that form the other half of the bearing holes (25) is integrally formed.Type: ApplicationFiled: May 19, 2010Publication date: March 29, 2012Applicant: JTEKT CORPORATIONInventors: Kazuki Hamada, Hiroshi Ueno, Isao Usuki, Kunio Yanai, Hironori Hiraoka, Kotaro Yamashita, Hiroshi Satou, Takaaki Ikeda, Ryo Oonishi
-
Patent number: 8117748Abstract: A method may include locating first and second lobe members of a camshaft on a first shaft. The first shaft may include an annular wall defining a bore. The first lobe member may be located on a first portion of the first shaft and may define a first end of the camshaft. The second lobe member may be located on a second portion of the first shaft and may define a second end of the camshaft. The first shaft may be fixed from axial displacement and a tool may be displaced through the bore of the first shaft to fix the first lobe member to the first shaft. The fixing may include the first shaft being free from axial restraint in a first axial direction extending from the first portion of the first shaft to the second portion of the first shaft.Type: GrantFiled: October 9, 2008Date of Patent: February 21, 2012Inventors: Glenn E. Clever, James Fawcett
-
Patent number: 8113163Abstract: A camshaft may include a first shaft, a stop member, and a first lobe member. The first shaft may include an outer radial surface having a first recess extending radially therein. The stop member may be axially fixed within the first recess. The first lobe member may define an inner bore located on the outer radial surface of the first shaft. The first lobe member may include a second recess extending radially into the inner bore. The stop member may extend into the second recess to axially locate the first lobe member on the first shaft.Type: GrantFiled: March 9, 2009Date of Patent: February 14, 2012Inventors: Glenn E. Clever, Roy Glenn Kaywood