Abstract: A valve train for actuating gas exchange valves of an internal combustion engine may include a first camshaft that is received such that it can be rotated in a first shaft axis, and a second camshaft that is received such that it can be rotated in a second shaft axis. At least one of the camshafts may be configured as an adjustable camshaft that comprises an outer shaft in which an inner shaft is received such that it can be rotated. At least one of the camshafts may be drive-connected via a drive means to a crankshaft of the internal combustion engine. A phase shifting member may be provided by way of which the phase position of at least one inner shaft can be changed relative to the phase position of at least one outer shaft of the camshaft. The phase shifting member may comprise an arrangement that is spaced apart from both shaft axes.

Abstract: A camshaft may include a shaft on which at least one sliding element is received in such a way as to be axially displaceable along a shaft axis. The shaft may comprise an external longitudinal spline structure that meshes with an internal spline structure of a passage in the sliding element such that the sliding element is arranged in a rotationally fixed manner on the shaft. The sliding element, on its axial end faces, may comprise guiding portions by way of which the sliding element is guided on the shaft to minimize an axial offset of the sliding element. Further, guiding sleeves against which the guiding portions of the sliding element are supported may be received on the shaft.

Abstract: A valve control system may include an adjustable camshaft that includes an outer shaft and an inner shaft that extends through the outer shaft. The valve control system may further include a phase shifter that comprises a first control element and a second control element that can be rotated relative to the first control element. The outer shaft and the inner shaft may each be connected with a control element. The valve control system may also include a stop coupled with the outer shaft in a torque-proof manner, as well as a counter-stop coupled with the inner shaft in a torque-proof manner. A maximal angle of rotation of the inner shaft in the outer shaft may be determined by the stop bordering on the counter-stop.

Abstract: A rotor for an electric motor may include a shaft and a plurality of disks that are received on the shaft. The disks may include an inner passage, through which the shaft is guided, with the result being that the disks are centered on the shaft via the inner passage. The plurality of disks may have spring tongues that are configured in or along the inner passage and are braced with a bracing force in a circumferential direction against at least one mating geometry that is configured on the shaft.

Abstract: A hood module for attachment on a cylinder head of an internal combustion engine may include a hood body comprised of plastic and a bearing bracket comprised of metal as a rotatable holder for a camshaft in the hood module. The bearing bracket may be attached to the hood body with position accuracy by a joint connection so that the bearing bracket is aligned for attachment on the cylinder head through the hood body. In some examples, a joint element in the form of a sleeve may be used as part of the joint connection between the bearing bracket and the hood body.

Abstract: An adjustable camshaft may include an outer shaft that is hollow and an inner shaft received in the outer shaft and rotatable in the outer shaft. The inner shaft may include a cavity into which oil can be applied. At least a first radial opening may be configured in the outer shaft and at least a second radial opening may be configured in the inner shaft. Thus oil can flow between the cavity and an outside of the outer shaft during overlap of the first radial opening and the second radial opening. The first radial opening on an inside of the outer shaft may have a greater cross-section than on the outside of the outer shaft.

Abstract: A bearing apparatus for mounting a camshaft in a cylinder head of an internal combustion engine may include a bearing element that surrounds a bearing ring in which the camshaft is rotatably mounted or mountable. The bearing element may be made of a first material whose expansion coefficient is greater than an expansion coefficient of a second material of which the bearing ring is made. An outer surface of the bearing ring may include a contour that engages in a form-fitting manner with a mating contour formed on an inner surface of the bearing element that surrounds the bearing ring. The contouring formed by the contour and the mating contour may form retaining structures that brace against one another in instances of thermal expansion.

Abstract: A method for mounting laminated sheets onto a shaft of a rotor provided for an electrical machine may involve sliding the laminated sheets onto the shaft and bracing the laminated sheets between two rotation-resistant thrust washers connected with the shaft. The laminated sheets may be slid onto the shaft to lie against a stop in the form of a first thrust washer arranged upon a first subsection of the shaft. A second thrust washer may be pressed in by axially bracing the laminated sheets onto a second axial subsection of the shaft in a frictional interlocking manner. The second thrust washer may be positioned after a surface of the second subsection has been enlarged by the introduction of an exterior surface profile.

Abstract: An adjustable camshaft for a valve drive of an internal combustion engine may include an inner shaft extending through an outer shaft with a cam element disposed on the outer shaft. The cam element may be connected rotationally conjointly to the inner shaft. The cam element may have a shaft passage with an internal bearing surface, which, together with a bearing surface on an outer side of the outer shaft, forms a plain bearing arrangement for the rotatable arrangement of the cam element on the outer shaft. The bearing surface on the outer side of the outer shaft and/or the internal bearing surface of the shaft passage of the cam element may include one or more sections with a spherical shape.

Abstract: The invention relates to a hollow body (2) formed at least in regions as a hollow cylinder and having an integrated oil separating device, wherein a vortex generator (4) is disposed in a hollow space (3) of the hollow body (2), wherein the hollow body (2) comprises at least one inlet opening (9) on the jacket side for introducing gas charged with oil into the hollow space (3) and wherein the hollow body (2) comprises at least one discharge opening for discharging separated oil and for discharging gas freed of oil. According to the invention, an oil separating ring (5) is disposed within the hollow space (3) and downstream of the vortex generator (4) as seen in the flow direction. The invention further relates to a cylinder head cover having such a hollow body (2).

Abstract: An adjustable camshaft can be used in valve drives of internal combustion engines, amongst other places. The adjustable camshaft may include an outer shaft and an inner shaft that is concentric with and rotatably supported in the outer shaft. A cam having a cam bore may be rotatably supported on an outer surface of the outer shaft so as to form a slide bearing gap between the cam and the outer shaft. The cam may be rotatably-fixed to the inner shaft so that the inner shaft and the cam rotate with one another. Furthermore, the adjustable camshaft may include an oil channeling groove disposed beneath the cam in the outer surface of the outer shaft. In many cases, at least one side of the oil channeling groove may be exposed such that it extends beyond the slide bearing gap and the cam.

Abstract: An adjustable camshaft can be used in a valve drive of an internal combustion engine. The adjustable camshaft may include an inner shaft rotatably supported by and concentric with an outer shaft. A cam element may be rotatably supported on the outer shaft such that the outer shaft extends through a cam bore of the cam element. The cam element may be rotatably-fixed to the inner shaft, in some cases, by way of a bolt. Further, a bearing sleeve that is rotatably-fixed to the cam element may be inserted within the cam bore such that a slide bearing gap is formed between the bearing sleeve and the outer shaft. Furthermore, in some examples the cam element may be a collared cam that has a cam base body and a cam collar adjacent to one another.

Abstract: An oil-separating device for crankcase ventilation of an internal combustion engine may include a hollow member that extends axially in a longitudinal axis and through which a gas flow charged with oil can flow. The gas flow may flow against an oil separation ring disposed within or formed in the hollow member. The hollow member may contain a substantially rotationally symmetrical flow guiding member that has a flow projection located in the longitudinal axis and that has a flow contour that radially increases in a downstream direction so that gas can flow around the flow guiding member and so that the gas flow between the flow contour and the inner side of the hollow member can strike the oil separation ring in an accelerated manner.

Abstract: An oil separator may be used in a variety of contexts, one of which is for crankcase ventilation of an internal combustion engine. The oil separator may include a hollow member that extends along a longitudinal axis and is configured to receive a gas flow that is charged with oil. The oil separator may also include an oil separation member disposed within the hollow member and against which the gas flow flows. A redirection member may be disposed proximate the oil separation member in the hollow member, wherein the redirection member redirects at least a portion of the gas flow traveling substantially along the longitudinal axis radially outwards so as to impact an inner side of the oil separation member. As a result of an impactor effect from the gas flow striking the oil separation member as well as the inertia of the oil, the oil may remain in and/or pass through the oil separation member.

Abstract: The invention relates to a camshaft comprising a support shaft formed as a hollow shaft. An inner shaft is arranged concentrically in the interior of the support shaft, wherein the inner shaft is rotatable relative to the support shaft. There is arranged on the support shaft a first cam segment with a first recess for receiving the support shaft, which cam segment is rotatable with respect to the support shaft and is connected in a rotationally conjoint manner to the inner shaft via a first opening in the support shaft. The first cam segment has at least two cam contours. The connection between the inner shaft and the first cam segment is furthermore configured such that the first cam segment is axially displaceable relative to the inner shaft and to the support shaft.

Abstract: 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.

Abstract: The invention relates to an adjustable camshaft for the valve gear of an internal combustion engine, comprising an outer shaft, on which at least one first cam is arranged and connected to the outer shaft in a rotationally fixed manner, and an inner shaft extending through the outer shaft, to which inner shaft at least one second cam is connected in a rotationally fixed manner, wherein the second cam connected to the inner shaft in a rotationally fixed manner has a cam hole and is rotatably supported on a seating point on the outer shaft. According to the invention, at least one oil groove is introduced at the seating point in the outer shaft and/or in the inner wall of the cam hole, into which oil groove oil is guided from a gap between the outer shaft and the inner shaft through at least one passage extending through the outer shaft.

Abstract: The invention relates to a camshaft, in particular for motor vehicle engines, comprising an outer shaft (1), an inner shaft (2) arranged coaxially in the outer shaft (1), first functional elements (3) rigidly arranged on the outer shaft (1), second functional elements (4a, 4b), which are rotatably arranged on the outer shaft (1) and fastened to the inner shaft (2) in a rotationally fixed manner, and a phase adjuster (5) connected to the outer shaft (1) and the inner shaft (2) for rotating the inner shaft (2) relative to the outer shaft (1), wherein the phase adjuster (5) is fastened to the inner shaft (2) and thereby a torque is applied. According to the invention, one of the functional elements (4a, 4b) connected to the inner shaft (2) in a rotationally fixed manner has tool accommodation surfaces (11) on the cylindrical surface side outside of a functional surface (12a, 12b). The invention further relates to such a functional element.

Abstract: An oil-laden gas stream flows axially through a tube shaft formed with at least one radially throughgoing inner oil-discharge port and, axially downstream therefrom, with at lest one radially throughgoing inner gas-discharge port. A bearing supports the tube shaft for rotation about the axis and is formed axially level with the ports with respective radially throughgoing outer oil-discharge and gas-discharge ports. An oil separator inside the tube shaft axially between the oil-discharge ports and the gas-discharge ports is oriented to deflect oil particles from the stream radially outward such that the oil flows out through the inner and outer oil-discharge ports and the gas stream can flow downstream out through the gas-discharge ports.

Abstract: The invention relates to an adjustable camshaft for the valve gear of an internal combustion engine, comprising an outer shaft, on which at least one first cam is arranged and connected to the outer shaft in a rotationally fixed manner, and an inner shaft extending through the outer shaft, to which inner shaft at least one second cam is connected in a rotationally fixed manner, wherein the second cam connected to the inner shaft in a rotationally fixed manner has a cam hole and is rotatably supported on a seating point on the outer shaft. According to the invention, at least one oil groove is introduced at the seating point in the outer shaft and/or in the inner wall of the cam hole, into which oil groove oil is guided from a gap between the outer shaft and the inner shaft through at least one passage extending through the outer shaft.