Abstract: An electrical contacting element for a bipolar plate is disclosed. The contacting element has the form of a folded sheet metal clamp, wherein a planar lower clamp part is integrally connected to a likewise planar upper clamp part by a connecting region that is linear when viewed from above, and is spring-loaded against the upper clamp part. The side lines that belong to the planar clamp parts and are opposite the connecting region are designed in such a way that, both when the bottom side of the sheet metal clamp is viewed from above and when the top side of the sheet metal clamp is viewed from above, one of the clamp parts is partially covered by the other clamp part.

Abstract: The invention relates to a method for embossing a channel structure (3) comprising a plurality of parallel channel portions (5) in a planar metal sheet (11) to form a half-plate (2, 2?), in particular for a bipolar plate (1) of an electrochemical cell, said method having the following steps: providing the planar metal sheet (11) with a uniform initial wall thickness (d5), inserting the metal sheet (11) into a forming tool (12), wherein a base plane (BE) of the sheet (11) defined by the undeformed planar metal sheet (11) is provided to rest on a tool plane defined by a tool part (13) of the forming tool (12), forming the plurality of channel portions (5), each channel portion (5) being designed with two non-parallel flanks (7, 8) in such a way as to allow material from embossing portions (9, 10) of the metal sheet (11), which are located outside the flanks and remain in the base plane (BE) and/or a plane parallel thereto throughout the entire forming process, to be displaced into the flanks (7, 8), each fla

Abstract: A flow field plate (1) comprises two stamped half-plates (2, 3), which lie one on the other and which have a rectangular, elongate basic shape, wherein the half-plates (2, 3) form: —coolant ports (5); —media ports (6, 7), which are located on the long sides of the half-plates (2, 3); —distribution fields (8), which are located next to the ports (5, 6, 7) and are provided for coolant distribution and media distribution; and—active fields (9); and wherein stamped structures (4) are formed within the distribution fields (8) such that there are increasing free flow cross-sections for the media which flow from the port (6, 7) in question toward the port (7, 6) located at the opposite long side.

Abstract: A contacting assembly of a bipolar plate having two half-sheets which are spaced apart from one another in parallel and can be attributed to a bipolar plate. Each half-sheet has embossing elements and the embossing elements of the two half-sheets face one another. A connecting pin inserted between the half-sheets makes contact with embossing elements of the half-sheets.

Abstract: A contacting assembly of a bipolar plate having two half-sheets which are spaced apart from one another in parallel and can be attributed to a bipolar plate. Each half-sheet has embossing elements and the embossing elements of the two half-sheets face one another. A connecting pin inserted between the half-sheets makes contact with embossing elements of the half-sheets.

Abstract: A camshaft adjusting device for an internal combustion engine, comprising a housing comprising a bearing sleeve arranged to be concentrically disposed on a camshaft, the bearing sleeve arranged to be guided through a cylinder head wall, an annular gap arranged to be inside the cylinder head, the annular gap arranged to be formed between the bearing sleeve and the camshaft, an adjusting mechanism comprising a control shaft arranged within the housing, a traction mechanism comprising a drive gear secured to the bearing sleeve outside the cylinder head, and a ball bearing arranged within the drive gear and securing the control shaft within the adjusting mechanism.

Abstract: A camshaft unit (1), having a first camshaft (2) which is phase-adjustable with respect to a crankshaft, having a second camshaft (3) which is arranged concentrically with respect to the first camshaft (2), and having a camshaft adjuster (5) by which both camshafts (2, 3) are phase-adjusted with respect to the crankshaft.

Abstract: The invention relates to an adjustment apparatus (1) for changing the compression ratio in an internal combustion engine, comprising a driving means (2), at least one transmission (5) connected downstream of the driving means (2) and a drive shaft (7) connected downstream of the transmission (5), wherein the transmission (5) has at least two different transmission stiffness progressions between nominal load limits of 0 and 100%.

Abstract: A camshaft adjusting device for an internal combustion engine, comprising a housing comprising a bearing sleeve arranged to be concentrically disposed on a camshaft, the bearing sleeve arranged to be guided through a cylinder head wall, an annular gap arranged to be inside the cylinder head, the annular gap arranged to be formed between the bearing sleeve and the camshaft, an adjusting mechanism comprising a control shaft arranged within the housing, a traction mechanism comprising a drive gear secured to the bearing sleeve outside the cylinder head, and a ball bearing arranged within the drive gear and securing the control shaft within the adjusting mechanism.

Abstract: Camshaft unit (1) having a first camshaft (2), which is phase-adjustable with respect to a crankshaft, a second camshaft (3), which is disposed concentric to the first camshaft (2) and is always in phase with the crankshaft, a camshaft adjuster (5) with which the first camshaft (2) is phase-adjustable with respect to the crankshaft, a connecting member (4), which is displaceable in the axial direction of the camshafts (2, 3) and has first toothed section (16) that meshes with counter-toothed section (6) on the first camshaft (2), and an adjusting drive (9) by which a connecting member (4) can be displaced axially, wherein through an axial advance, a relative rotation of the first camshaft (2) with respect to the connecting member (4) takes place.

Abstract: A camshaft unit (1), having a first camshaft (2) which is phase-adjustable with respect to a crankshaft, having a second camshaft (3) which is arranged concentrically with respect to the first camshaft (2), and having a camshaft adjuster (5) by which both camshafts (2, 3) are phase-adjusted with respect to the crankshaft.

Abstract: Camshaft unit (1) having a first camshaft (2), which is phase-adjustable with respect to a crankshaft, a second camshaft (3), which is disposed concentric to the first camshaft (2) and is always in phase with the crankshaft, a camshaft adjuster (5) with which the first camshaft (2) is phase-adjustable with respect to the crankshaft, a connecting member (4), which is displaceable in the axial direction of the camshafts (2, 3) and has first toothed section (16) that meshes with counter-toothed section (6) on the first camshaft (2), and an adjusting drive (9) by which a connecting member (4) can be displaced axially, wherein through an axial advance, a relative rotation of the first camshaft (2) with respect to the connecting member (4) takes place.

Abstract: A valve drive for controlling gas exchange valves of an internal combustion engine. The valve drive has at least one valve camshaft that is supported within a cylinder head of the engine and that can be moved in rotation by a drive disk and an adjustment device, which has an adjustment motor and a gear train. The adjustment device provides for an axial movement and/or rotation of the valve camshaft relative to the drive disk in a specific manner upon actuation of the adjustment motor and by the intermediately connected gear train in order to vary in a specific manner an actuation of the gas exchange valves that occurs by cams of the valve camshaft. Also, the adjustment motor is placed predominantly or completely within a common chamber with the drive disk.

Abstract: A device for adjusting the relative rotation angle position of a rotating shaft (1), in particular of a camshaft, relative to a drive element (2), including a substantially hollow-cylindrical displacement member (3), which is arranged coaxially to the shaft (1) and to the drive element (2) and is coupled to the shaft (1) and to the drive element (2) such that an axial displacement of the displacement member (3) effects an adjustment of the relative rotation position of the shaft (1) relative to the drive element (2), and an actuating unit (4) for axially displacing the displacement member (3), the actuating unit comprising two brake actuators (5, 6) and two counter-rotating threaded drives (7, 8) for coupling the brake actuators (5, 6) to the displacement member (3) such that, upon selective actuation of a brake actuator (5, 6), an axial displacement of the displacement member (3) takes place in one direction or the other.

Abstract: A device for adjusting the relative rotation angle position of a rotating shaft (1), in particular of a camshaft, relative to a drive element (2), including a substantially hollow-cylindrical displacement member (3), which is arranged coaxially to the shaft (1) and to the drive element (2) and is coupled to the shaft (1) and to the drive element (2) such that an axial displacement of the displacement member (3) effects an adjustment of the relative rotation position of the shaft (1) relative to the drive element (2), and an actuating unit (4) for axially displacing the displacement member (3), the actuating unit comprising two brake actuators (5, 6) and two counter-rotating threaded drives (7, 8) for coupling the brake actuators (5, 6) to the displacement member (3) such that, upon selective actuation of a brake actuator (5, 6), an axial displacement of the displacement member (3) takes place in one direction or the other.

Abstract: A valve drive for controlling gas exchange valves of an internal combustion engine. The valve drive has at least one valve camshaft that is supported within a cylinder head of the engine and that can be moved in rotation by a drive disk and an adjustment device, which has an adjustment motor and a gear train. The adjustment device provides for an axial movement and/or rotation of the valve camshaft relative to the drive disk in a specific manner upon actuation of the adjustment motor and by the intermediately connected gear train in order to vary in a specific manner an actuation of the gas exchange valves that occurs by cams of the valve camshaft. Also, the adjustment motor is placed predominantly or completely within a common chamber with the drive disk.