Abstract: In an adjusting mechanism having an adjusting device for adjusting a phase position of a camshaft in relation to a crankshaft of an internal combustion engine, and a drive gear driven by the crankshaft, for driving the camshaft, a four-shaft transmission configured as an epicyclic summing gear train for the adjustment of the phase position of the camshaft is provided in a housing from which four shafts extend and two of them are concentric for connection to corresponding shafts of a control motor capable of applying different braking torques to the two concentric shafts.

Abstract: In an adjusting apparatus, particularly for an internal combustion engine having cylinders arranged in an engine block, with a crankshaft and with pistons movably disposed in the cylinders, the adjusting apparatus includes a pick-up which causes an adjustment of an adjustable device, and an adjusting element which is operatively connected to the pick-up, the adjusting element being arranged movably on an adjusting shaft (9) which can be moved by an actuator translationally with a cone as adjusting element or rotationally with an eccentric (8) as adjusting element.

Abstract: In a control arrangement with a control unit for activating and deactivating cylinders of a multi-cyliner internal combustion engine including throttle units assigned to the various cylinders of the internal combustion engine, the control unit provides for opening and/or closing of the throttle units assigned to the cylinder during the switching process in accordance with a predetermined timing function.

Abstract: In a method and apparatus for coupling or decoupling two actuating elements of a valve drive of an internal combustion engine for operating a gas exchange valve, comprising a locking element movable between two end positions for coupling the actuating elements, an electromagnet for actuating the movable locking element, a permanent magnet is associated with the armature for holding the armature and the locking element in one end position and means for biasing the armature and the locking element in the opposite end position, the electromagnet is energizable in one sense for moving the armature into one end position in which the armature is retained by the permanent magnet with a force greater than a counteracting force generated by the biasing means, and in the opposite sense so as to generate a force exceeding that of the permanent magnet for moving the armature in the opposite end position, where it is retained by said biasing means.

Abstract: In a camshaft adjusting device comprising an adjusting mechanism for adjusting the phase positions of first and second camshafts with respect to a crankshaft driving the camshaft adjusting device, the adjusting mechanism includes an adjustment input and first and second outputs connected to the first and second camshafts respectively, with first and second transmission ratios, respectively, for changing the phase angles between the drive input and the first and second outputs respectively, at different rates when the adjustment input is actuated.

Abstract: In a device for adjusting the phase angle between two rotating, drive-connected elements, which are interconnected by means of an adjustment device, means are provided for the energy-saving adjustment of the phase angle based on an alternating torque of one element which is also used in the event of a fault, to provide for an emergency operation in which the relative angular phase position between the two elements is kept essentially constant.

Abstract: In an apparatus for adjusting a phase position of a camshaft in relation to a crankshaft which drives the camshaft, including an electric actuator for operating an adjustment mechanism, which can move the camshaft to a basic or emergency-operating position in the event of a shut-down as a result of an operational fault, the emergency-operating position can be reliably reached with the aid of the electric actuator which is supplied with energy by an energy supply that is separate from an operational energy supply and which is capable of moving the adjustment mechanism to the emergency-operating position. Also, a method for operating an apparatus for adjusting a phase position of a camshaft is provided.

Abstract: In an exhaust gas turbocharger for an internal combustion engine comprising a compressor and a turbine interconnected by a shaft in a rotationally fixed manner, and an electric machine which can be connected to the exhaust gas turbocharger via a clutch, the exhaust gas turbocharger can be driven at least temporarily by a disk-shaped flywheel rotatably supported on the shaft and being operable selectively by the turbine and by an electro-dynamic structure for improving the response behavior of the exhaust gas turbocharger.

Abstract: In a balance shaft for a multi-cylinder in-line engine with at least two imbalance weight sections and at least one bearing structure wherein the balance shaft has imbalance weight sections being arranged symmetrically relative to the bearing position and at least one of the imbalance weight sections is connected to a further shaft section at an end facing away from the bearing position, a flexible coupling element that enables a deflection of the end of the connected imbalance weight section in the direction of the resulting centrifugal forces when the balance shaft rotates is provided between the end of the at least one imbalance weight section facing away from the bearing position and the further shaft section.

Abstract: In an adjusting mechanism having an adjusting device for adjusting a phase position of a camshaft in relation to a crankshaft of an internal combustion engine, and a drive gear driven by the crankshaft, for driving the camshaft, a four-shaft transmission configured as an epicyclic summing gear train for the adjustment of the phase position of the camshaft is provided in a housing from which four shafts extend and two of them are concentric for connection to corresponding shafts of a control motor capable of applying different braking torques to the two concentric shafts.

Abstract: In an adjusting mechanism which is connected to first and second camshafts of a camshaft drive arrangement including a control device for adjusting the phase position of at least one of the camshafts relative to a crankshaft of an internal combustion engine, and having a drive device for driving the camshaft arrangement, a first partial mechanism for driving the first camshaft and a second partial mechanism for driving the second camshaft are provided so as to be driven in parallel by means of a common drive device for adjusting the angular position of the first and second camshafts relative to the crankshaft of the engine.

Abstract: In an adjusting device for a camshaft of an internal combustion engine having a drive element which is driven by a crankshaft of the internal combustion engine, an output element which drives the camshaft of the internal combustion engine, and an actuating element controlled by a brake so as to provide for a relative rotation between the drive element and output element by varying the braking torque effective on the actuating element.

Abstract: In an adjustment device for a camshaft of an internal combustion engine for varying the phase relationship of a camshaft with respect to a crankshaft as a function of the operating point of the internal combustion engine, the adjustment device comprises an epicyclic gear structure with a drive-side and an output side ring wheel, which are in meshing engagement with planet wheels, and the output-side ring wheel has a number of teeth different from that of the drive-side ring wheel so that the position of the camshaft relative to the crankshaft can be adjusted via an electric servomotor which drives a central sun wheel.

Abstract: The invention relates to a multi-piece valve for reciprocating piston engines in which the valve stem is connected to the valve head in a manner resistant to both tension and compression. In the area of a center through-opening the valve head has an annular bearing surface for a stem-side flange. In addition, the center opening widens on the combustion chamber-side of the valve head, the head-side end of the valve stem being plastically expanded so that it fills this enlargement, forming a positive interlock. In order to improve the service life of the connection between valve head and valve stem, according to the invention the combustion chamber-side enlargement of the center opening and accordingly also the conformed, end-side expansion of the valve stem are of non-circular design so that a positively interlocking torsionally fixed connection is produced between the valve stem and the valve head.

Abstract: The invention relates to a multi-piece valve for reciprocating piston engines in which the valve stem is connected to the valve head in a manner resistant to both tension and compression. In the area of a center through-opening the valve head has an annular bearing surface for a stem-side flange. In addition, the center opening widens on the combustion chamber-side of the valve head, the head-side end of the valve stem being plastically expanded so that it fills this enlargement, forming a positive interlock. In order to improve the service life of the connection between valve head and valve stem, according to the invention the combustion chamber-side enlargement of the center opening and accordingly also the conformed, end-side expansion of the valve stem are of non-circular design so that a positively interlocking torsionally fixed connection is produced between the valve stem and the valve head.

Abstract: In an adjustment device for a camshaft of an internal combustion engine for varying the phase relationship of a camshaft with respect to a crankshaft as a function of the operating point of the internal combustion engine, the adjustment device comprises an epicyclic gear structure with a drive-side and an output side ring wheel, which are in meshing engagement with planet wheels, and the output-side ring wheel has a number of teeth different from that of the drive-side ring wheel so that the position of the camshaft relative to the crankshaft can be adjusted via an electric servomotor which drives a central sun wheel.

Abstract: An electromagnetic actuator includes two electromagnets arranged opposite one another, an armature movable back and forth between the electromagnets against the force of two mutually counteracting springs, and an adjusting device for adjusting the armature rest position. After several hours of operation, due to settling of components, the pre-tension of the springs changes. To counteract that and achieve a durable adjustment of the pre-tension, the actuator is pre-settled before being placed in service. In this regard, the springs are compressed in repeating compression cycles so often until the energy respectively stored therein due to their compression no longer or only insignificantly differs from the energy stored in the respective spring in a preceding compression cycle, and thereafter the pre-tension of the springs is adjusted. The electromagnetic actuator is useful for controlling the gas exchange in an internal combustion engine.

Abstract: In an operating system for a hydraulic valve clearance control element of an internal combustion engine, which includes a hydraulic fluid having a pressure that depends on the engine operating state and wherein the hydraulic clearance control element includes a pressure chamber in which a hydraulic fluid volume is maintained for adjusting the length of the hydraulic clearance control element and means for maintaining the fluid volume when, after engine shut down, the pressure of the hydraulic fluid supplied by an engine fluid pressure source drops below a certain value so as to maintain the hydraulic clearance control element at its operating length during engine shutdown, means are arranged on the hydraulic fluid supply line to the hydraulic valve clearance control element for releasing hydraulic fluid to reduce its pressure below the certain value immediately upon engine shut down to safely maintain the hydraulic clearance control elements at their operating length.

Abstract: In a device for actuating at least one gas exchange valve of an internal combustion engine, comprising at least one pivoting armature, which is operatively connected to the gas exchange valve, and at least one first and at least one second electromagnetic units for actuating the pivoting armature, the pivoting armature is included in a first functional group with an armature housing and at least one of the two electromagnetic units is included in a second functional group and the functional groups are interconnected by connection means.

Abstract: In an operating system for a hydraulic valve clearance control element of an internal combustion engine, which includes a hydraulic fluid having a pressure that depends on the engine operating state and wherein the hydraulic clearance control element includes a pressure chamber in which a hydraulic fluid volume is maintained for adjusting the length of the hydraulic clearance control element and means for maintaining the fluid volume when, after engine shut down, the pressure of the hydraulic fluid supplied by an engine fluid pressure source drops below a certain value so as to maintain the hydraulic clearance control element at its operating length during engine shutdown, means are arranged on the-hydraulic fluid supply line to the hydraulic valve clearance control element for releasing hydraulic fluid to reduce its pressure below the certain value immediately upon engine shut down to safely maintain the hydraulic clearance control elements at their operating length.