Abstract: A control structure for the adjusting motor (8) of an electric camshaft adjuster (6) in an internal combustion engine (1) is provided. The control structure includes a controller (19) which processes measuring signals of the internal combustion engine (1) to control data for the adjusting motor (8). A controller (19) which has meaningful values for the adjusted setpoint rotational speed of the adjusting motor (8), even when the input differential signal has a zero value, is obtained by applying the signal of an uncontrolled rotational speed (21) to the output signal (20) of a controlled setpoint rotational speed.

Abstract: The invention concerns a control device for adjusting the relative angular position of a driven shaft, particularly a camshaft of an internal combustion engine, said device comprising a drive pinion that is rotatably connected to the shaft, an adjusting element (1) for the angular adjustment of the drive pinion relative to the shaft, two chambers (2, 3) that are alternately supplied with hydraulic fluid and a control valve (6) for actuating the adjusting element (1), said control valve being connected to the chambers (2, 3) of the adjusting element (1) through pressure medium channels (4, 5). The control valve (6) comprises a valve body (7) that has two working connections A and B for the pressure medium channels (4, 5), a delivery connection P for the supply of hydraulic fluid and a discharge connection T for the discharge of hydraulic fluid, and the control valve (6) further comprises a sliding valve control piston (8) for setting different hydraulic resistances W between the individual connections.

Abstract: In a guide rail for the valve train of an internal combustion engine, having receiving spaces disposed in an elongate body in spaced-apart relationship behind one another and accommodating valve lifters, flats are formed upon the outer surface area of each valve lifter to prevent the lifter from rotating about its central longitudinal axis. These flats are supported by flats of the guide rail which are located within the pertaining receiving space. An inlet bore is assigned to each receiving space of the elongate body for insertion of the valve lifter with an attached trumpet-like end in direction of its longitudinal axis. Subsequently the valve lifter is shifted in axis-parallel relationship to the flats of the guide rail, which act as rotation-inhibiting surfaces, and then is slightly displaced again in axial direction.

Abstract: The invention concerns a control device for adjusting the relative angular position of a driven shaft, particularly a camshaft of an internal combustion engine, said device comprising a drive pinion that is rotatably connected to the shaft, an adjusting element (1) for the angular adjustment of the drive pinion relative to the shaft, two chambers (2, 3) that are alternately supplied with hydraulic fluid and a control valve (6) for actuating the adjusting element (1), said control valve being connected to the chambers (2, 3) of the adjusting element (1) through pressure medium channels (4, 5). The control valve (6) comprises a valve body (7) that has two working connections A and B for the pressure medium channels (4, 5), a delivery connection P for the supply of hydraulic fluid and a discharge connection T for the discharge of hydraulic fluid, and the control valve (6) further comprises a sliding valve control piston (8) for setting different hydraulic resistances W between the individual connections.

Abstract: A shaped part made from a strip, peripherally contiguous ends of the strip being firmly connected to each other is characterized in that a recess (6) is arranged on one end of the strip (1) and an over-dimensioned projection (7) is arranged on the other end of the strip (1), and after bending round of the strip (1), said ends are fit into each other in axial or radial direction so that through a plastic deformation, an undetachable interference fit results between said ends.

Abstract: The invention relates to a torque motor (1) provided with an annular rotor (15) and an annular stator (2), which comprises a stator frame with iron cores and electrical windings arranged thereon. According to the invention, the iron cores (10) and the electrical windings (11) are arranged in one or more separate stator segments (3), whereby each of these stator segments (3) occupies only a predetermined angular section ?180° in the stator frame and is detachably joined thereto. Preferably, a number of stator segments (3) are arranged which each occupy an angular section ?45° in the stator frame.

Abstract: An internal combustion engine having a valve train that includes a switchable cam follower is provided. The cam follower (20) has a generally cylindrical shape and can move longitudinally in a receptacle (21) of the engine (22), and is acted upon at one axial end by a cam (23) of a camshaft and at the other axial end indirectly or directly by a gas exchange valve of the valve train. A main oil gallery (24) is arranged in the internal combustion engine (22) for introducing hydraulic medium to a valve lash adjustment element arranged in the cam follower (20).

Abstract: The invention relates to a device for releasably connecting and adjusting the positions between a crankshaft and a cam shaft of an internal combustion engine, which includes a setting gear (1) configured as a three-shaft gear, which has a drive shaft (4) connected to the crankshaft, an output shaft (5) connected to the camshaft, and an adjusting shaft connected to an electric adjusting motor (2). A stationary transmission ratio io, which has a base or emergency running position, is present between the drive and output shafts when the adjusting shaft (6) is idle, the magnitude of the gear transmission ratio determining the gear type (positive or negative) and the direction of adjustment of the camshaft (3).

Abstract: An electromagnetic hydraulic valve (1), which including an electromagnet (2) with an armature (3) and of a valve housing (4) with an axial bore (5) and a piston valve (6) located therein is provided. The valve housing (4) includes several annular grooves (8, 9, 10) in which several radial openings (11, 12, 13) are located, which open into the axial bore (5), through which the hydraulic valve (1) has a fluid connection with a pressure connection (P), a tank connection (T) and two consumer connections (A, B). The piston valve (6) is acted upon by the armature (3) of electromagnet (2) and includes two ring-shaped control sections (14, 15), which connect alternatively the pressure connection (P) and the tank connection (T) with one of the consumer connections (A, B) through axial movement of piston valve (6). According to the invention, the radial openings (11, 12, 13) in valve housing (4) are provided as windows having a rectangular cross section.

Abstract: A traction device for an internal combustion engine includes a tensioning device having two lever arms of different lengths which are rigidly connected together and which are pivotally mounted for rotation about a rotation axis. Each of the lever arms supports on one end a tension pulley. The tensioning device is provided for positioning the tension pulleys on a pulling strand and a return strand by imposing an elastic force thereon.

Abstract: The invention relates to a tensioner (1) for a traction drive with a rotationally fixed housing (2) to a side of which a rotatable swivel arm (10), provided with a rotatable tension roller, is associated. A torsion spring (7) is placed between the housing (2) and the swivel arm (10) for loading the swivel arm (10) in the direction of an end position. Support of the tension spring (7) is realized by an insert (17a) placed in a circular ring shaped space (16) radially defined by a housing portion and the torsion spring (7).

Abstract: An axial bearing includes three running disks disposed in neighboring disposition, thereby defining two outer running disks and a middle running disk between the outer running disks. A first rim of rolling bodies is arranged between one outer running disk and the middle running disk, and a second rim of rolling bodies is arranged between the other outer running disk and the middle running disk. Received in a bore of the first and second rims and supporting the first and second rims of rolling bodies is a sleeve which is securely fixed to a shaft extends in axial direction beyond the outer running disks. The sleeve has one end formed with a radially outwardly directed flange which embraces the adjacent one of the outer running disks, wherein the other outer running disk is securely connected to the sleeve to thereby form a unitary bearing structure.

Abstract: The invention relates to an internal-combustion engine with a hydraulic device (1) for rotation angle adjustment of a camshaft (3) relative to a crankshaft thereof, which is arranged on the drive-side end (2) of the camshaft (3) supported in several radial bearings (4) in the cylinder head (5) of the internal-combustion engine. The device essentially includes a drive unit (6) drivingly connected with the crankshaft and also of a driven unit (7) rotationally fixed to the camshaft (3).

Abstract: An internal-combustion engine with a hydraulic device (1) for rotation angle adjustment of a camshaft (2) relative to a crankshaft is provided and includes a rotor with an impeller form (7), which is rotationally fixed via a central fastener (6) to the camshaft, and a stator (4), which rotates synchronously with a drive wheel (3) driven by the crankshaft, wherein on both sides of the impeller blades of the rotor, there are pressure chambers, which are each limited by radial walls of the stator (4) and can be filled with and emptied of hydraulic fluid via a hydraulic system, wherein the hydraulic fluid is guided, on one hand, via an annular gap (13) between rotor (7) and the central fastener (6) and, on the other hand, through generally axial and radial channels into the pressure chambers.

Abstract: A two-stage sealing arrangement for sealing an annular gap between an outer bearing ring and an inner bearing ring of a rolling-contact bearing, includes a first sealing element securely fixed to the outer bearing ring and having at least one sealing lip supported against the inner bearing ring. A second sealing element is disposed at an axial distance to the first sealing element, thereby defining a circular ring shaped sealing gap in a radial direction for accommodating, at least partially, a sealing material.

Abstract: A connecting rod of a crank mechanism is made as a single sheet metal part by shaping without chip removal out of sheet metal. The connecting rod comprises a base sheet (1) that is provided with an upper connecting rod eye (2) and a lower connecting rod eye (3). Each of the connecting rod_eyes (2, 3) has an integral cylindrical stamping (6, 7). The connecting rod further comprises a stiffening collar (8) that is integrally formed out of the base sheet (1) and is configured without interruption on the periphery of the base sheet (1).

Abstract: A clutch release bearing includes a housing, a first bearing ring having a skirt for fixed rotative securement of the first bearing ring to the housing, a revolving second bearing ring connected to the separating clutch via a spring element, and a plurality of rolling elements guided between the first and second bearing rings. Seals are provided on both sides of the rolling elements at a distance thereto and involve a sealing arrangement which is securely fixed to the housing and comprised of at least two components to establish two sealing zones for sealing an annular gap between the first and second bearing rings. The sealing arrangement cooperates with a planar surface of the revolving bearing ring and assumes a desired position, when the revolving bearing ring is installed with the assistance of a press-fit tool.

Abstract: A tensioning or deflection pulley for a belt drive includes a carrier and a track roller comprised of an inner ring, an outer ring, and a connecting assembly, including a wheel disk extending between the inner and outer rings, and a rib assembly disposed in both sides of the disk in circumferential spaced-apart relationship, for interconnecting the inner and outer rings. The track roller is supported on the carrier by a sealed rolling-contact bearing via a fastening screw. A first sealing element is connected to the track roller on a carrier-distal side, and a second cap-shaped sealing element is disposed between the carrier and the track roller and detachably secured to the inner ring of the track roller to thereby seal the track roller on both sides.

Abstract: A multi-part synchronizing ring (1) of a synchronization device with an annular base body (2) and with at least one friction surface (19) on the base body (2), as well as with teeth (3) pointing outwards, has at least one driver element (4, 5), wherein the driver element (4, 5) is formed on an annular disk (6) separate from the base body (2).

Abstract: A play-free radial ball bearing, includes an inner bearing ring and two outer bearing rings which are disposed in spaced-apart relationship and define a common raceway. A spring element applies an axial force on one of the outer bearing rings to thereby press the outer bearing rings resiliently against one another. The outer bearing rings and the spring element are surrounded by a tolerance ring which is made of plastic material to provide a structural unit, whereby the tolerance ring has a shoulder on one end for radially surrounding the spring element and at least one retaining lug on another end for radially surrounding the other one of the outer bearing rings.