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 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: A device for varying valve timing in an internal combustion engine comprises an adjusting mechanism for varying an angle of rotation between a drive pinion (2) and a camshaft (end portion of the camshaft 1), said adjusting mechanism being configured as a wobble transmission. The drive pinion (2) comprises a first front-end gearing (9) and a disk (10) comprises a second front-end gearing (11), which first and second front-end gearings mesh partially with each other, and the number of teeth of said front-end gearings differ from each other by at least one tooth. To reduce the overall dimensions of the device and avoid gearing lash, it is proposed, on the one hand, to connect the disk (10) rotationally fast to the camshaft (1) and on the other hand, to configure the disk (10) in axial direction of the camshaft (1) as a flexible element that can be deformed in axial direction by an adjusting device (thrust plate 17).

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: A device for electrically adjusting the relative rotation of two shafts, particularly a camshaft (15) in relation to a crankshaft of an internal combustion engine is provided. The adjusting device includes an adjusting gear system which is embodied as a triple-shaft gear mechanism and is provided with a crankshaft-fixed input part, a camshaft-fixed output part, and an adjusting shaft (13) that is connected in a torsion-proof manner to an electric adjusting motor shaft (32) of an electric adjusting motor (3). The adjusting motor (3) is configured as a brushless DC motor having a housing-fixed stator (35) and a permanent magnet rotor (34). A high degree of adjustment accuracy and adjustment speed are provided with minimal space requirements and low power consumption.

Abstract: A device for varying valve timing in an internal combustion engine comprises an adjusting mechanism for varying an angle of rotation between a drive pinion (2) and a camshaft (end portion of the camshaft 1), said adjusting mechanism being configured as a wobble transmission. The drive pinion (2) comprises a first front-end gearing (9) and a disk (10) comprises a second front-end gearing (11), which first and second front-end gearings mesh partially with each other, and the number of teeth of said front-end gearings differ from each other by at least one tooth. To reduce the overall dimensions of the device and avoid gearing lash, it is proposed, on the one hand, to connect the disk (10) rotationally fast to the camshaft (1) and on the other hand, to configure the disk (10) in axial direction of the camshaft (1) as a flexible element that can be deformed in axial direction by an adjusting device (thrust plate 17).

Abstract: A device for electrically adjusting the relative rotation of two shafts, particularly a camshaft (15) in relation to a crankshaft of an internal combustion engine is provided. The adjusting device includes an adjusting gear system which is embodied as a triple-shaft gear mechanism and is provided with a crankshaft-fixed input part, a camshaft-fixed output part, and an adjusting shaft (13) that is connected in a torsion-proof manner to an electric adjusting motor shaft (32) of an electric adjusting motor (3). The adjusting motor (3) is configured as a brushless DC motor having a housing-fixed stator (35) and a permanent magnet rotor (34). A high degree of adjustment accuracy and adjustment speed are provided with minimal space requirements and low power consumption.

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: An electrical adjusting device for changing an angle of rotation of a camshaft (3) relative to a crankshaft of an internal-combustion engine is provided. The device includes an adjusting gear unit (1), which is formed as a triple-shaft gear unit, including an input part (4) that is fixed to the crankshaft, an output part (5) that is fixed to the camshaft, and an adjusting shaft (6), which is connected in a torsion-proof manner to an electric adjusting motor (2) having a permanent magnet rotor and a stator (8) fixed to the housing. A stationary gear ratio (10), the value of which defines the adjusting gear unit (1) as a positive or negative gear unit and deter-mines whether a direction of adjustment of the camshaft (3, 65, 69) is into an advanced or retarded base position, is located between the input part (4) and the output part (5) when the adjusting shaft is at rest.

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: The invention concerns a rotary piston adjuster for adjusting the angular position of the camshaft of an internal combustion engine, said adjuster comprising an outer rotor having at least one hydraulic chamber, and an inner rotor comprising at least one pivoting vane that can pivot hydraulically in the hydraulic chamber between a retard stop position and an advance stop position. A locking device suitable for detachably connecting the outer and inner rotors to each other and at least one compression spring acting in opposition to the frictional torque of the camshaft are arranged between the two rotors. A liberal design of the compression spring and a low-wear operation with this spring are enabled by the fact that the compression spring (27, 27′) is arranged in an attachment (4) that is connected to the rotary piston adjuster, and the components of the attachment have a wear-resistant configuration and support the compression spring (27, 27′) at least pointwise over its entire length.

Abstract: Granules based on aluminium oxide having the characteristics: Average grain diameter: 5.0 to 150 &mgr;m Tamped density: 300 to 1200 g/l The granules are produced by dispersing aluminium oxide in water, performing spray drying, optionally heat treatment and/or silanization. In silanized form, the granules have the following characteristics: Average grain diameter: 5 to 160 &mgr;m Tamped density: 300 to 1200 g/l Carbon content: 0.3 to 12.0 wt. % The granules are used inter alia as catalyst supports, in cosmetics, in toner powders, in paints and lacquers, as abrasives and polishing agents and as a raw material in the production of glass and ceramics.

Abstract: The invention concerns a rotary piston adjuster for adjusting the angular position of the camshaft of an internal combustion engine, said adjuster comprising an outer rotor having at least one hydraulic chamber, and an inner rotor comprising at least one pivoting vane that can pivot hydraulically in the hydraulic chamber between a retard stop position and an advance stop position. A locking device suitable for detachably connecting the outer and inner rotors to each other and at least one compression spring acting in opposition to the frictional torque of the camshaft are arranged between the two rotors.

Abstract: The invention concerns a rotary piston adjuster for adjusting the angular position of the camshaft of an internal combustion engine, said adjuster comprising an outer rotor having at least one hydraulic chamber and an inner rotor having at least one pivoting vane that can pivot hydraulically between a retard stop position and an advance stop position, said adjuster further comprising a locking device suitable for detachably connecting the outer and inner rotors. Operational reliability and wear resistance as well as less constructional work are achieved according to the invention by the fact that the locking device (8) and the stops (27, 28) are arranged in an attachment (4) that is connected to the rotary piston adjuster and whose components are wear-resistant.

Abstract: Granules based on aluminium oxide having the characteristics: 1 Average grain diameter: 5.

Abstract: A hydraulic camshaft-adjusting device of the rotary piston type that includes of a drive gear (2) directly connected to a crankshaft and an impeller that is directly connected to a camshaft (3). The drive gear (2) has a cavity formed from a perimeter wall (5) and two side walls (5, 6) inside of which at least one hydraulic working chamber is formed from at least two boundary walls. The impeller has at least one radial vane (12) and each vane (12) divides one hydraulic work chamber into two hydraulic pressure chambers. The outer end (18) of each vane (12) of the impeller is pressed radially against the perimeter wall (5) of the drive gear (2) as a result of the force of a spring element (17) located at the inner end (15) of the vane.

Abstract: This invention pertains to a vane-cell positioning device with an external rotor (1) driven by the crankshaft of an internal combustion engine and an internal rotor (2) fixed to and turning with a camshaft which has pivoting vanes (15) that fit inside vane mounting notches (16), said vanes being loaded with pressurized oil in hydraulic work spaces (31) of the external rotor (1). The danger of the pivoting vanes (15) lifting off of the radial sealing surfaces is eliminated by loading the bottoms of the pivoting vanes (15) with pressurized oil as the internal combustion engine is running.

Abstract: The Invention concerns g solenoid valve, more particularly a proportional hydraulic valve which is arranged within a hydraulic system of a device for varying the valve timing of gas exchange valves in an internal combustion engine. The solenoid valve (1) generally comprises an electromagnet (2) having a hollow cylindrical magnet housing (3), at least one coil winding (4) and an armature (5) as Well as a first pole shoe (6) and a second pole shoe (7) and further comprises a valve member (8) having a hollow cylindrical valve housing (9) for receiving a spool valve which is displaceable relative to the valve housing (9) by the armature (5) of the electromagnet (2). According to the invention, the electromagnet (2) and the valve member (8) are connected and fixed radially and axially to each other by force locking and/or positive engagement by the second pole shoe (7) of the electromagnet (2) which is arranged adjacent the valve member (8) and configured as a plug-in lock for the valve housing (9).

Abstract: A hydraulic camshaft-adjusting device of the rotary piston type having a drive gear (2) and an impeller. The drive gear (2) has a cavity formed from a perimeter wall and two side walls (5, 6) inside of which at least one hydraulic working chamber is formed from at least two boundary walls (8). The impeller has a wheel hub (10) with at least one vane that extends into a working chamber, dividing the chamber into two associated hydraulic pressure chambers. The pressure medium feed to and from the pressure chambers is done using a pressure medium tap (16) on the side facing a camshaft as well as using pressure medium channels (17) incorporated into the axial sides (14, 15) of the wheel hub (10) of the impeller, which are connected to the pressure medium tap through a pressure medium distributor (20). The pressure medium tap (16) and the pressure medium distributor (20) are encircled at the head (19) and the outer surface (21) by a respective penetration (22, 23) in the side walls (5, 6) of the drive gear (2).

Abstract: An electromagnet (1), particularly a proportional magnet for operating a hydraulic valve, said electromagnet (1) comprising at least one coil winding (3) carried by a hollow cylindrical coil spool (2) which is circumferentially surrounded by a hollow cylindrical magnet housing (4) and limited at each end by a pole shoe (5, 6), said electromagnet (1) further comprising an axially moveable cylindrical armature (8) which is arranged in a hollow cylinder of the coil spool (2) that is configured as an armature space (7), the armature (8) being mounted for low friction in rotary, longitudinally moveable axial guides, and electromagnetically produced axial movements of the armature (8) can be transmitted to a hydraulic valve piston via a push rod (10) which is connected to the armature (8) to form an axial extension thereof.