Abstract: In a camshaft timing device for an internal combustion engine having a camshaft driven from a driveshaft by way of a camshaft drive which is capable of advancing or retarding the camshaft and therefore the valve timing, the camshaft drive is mounted onto the camshaft by a clamping screw which has a cylindrical opening in which a valve spool is movably disposed for controlling admission of hydraulic fluid to, and its release from, the camshaft drive, the valve spool being actuated by an electromagnetic motor acting against a valve spring biasing the valve spool in one direction for controlling the operation of the hydraulic camshaft drive and the valve spool is pressure balanced for accurate positioning control thereof.

Abstract: In a camshaft timing device for an internal combustion engine having a camshaft driven from a driveshaft by way of a camshaft drive which is capable of advancing or retarding the camshaft and therefore the valve timing, the camshaft drive is mounted onto the camshaft by a clamping screw which has a cylindrical opening in which a valve spool is movably disposed for controlling admission of hydraulic fluid to, and its release from, the camshaft drive, the valve spool being actuated by an electromagnetic motor acting against a valve spring biasing the valve spool in one direction for controlling the operation of the hydraulic camshaft drive and the valve spool pressure balanced for accurate positioning control thereof.

Abstract: A camshaft adjuster (1) for internal combustion engines has a central tensioning screw (9) for fixing the adjuster (1) in relation to a camshaft (2). A slide (8) controls the supply of the pressure medium to the camshaft adjuster (1) being integrated into the tensioning screw (9). The tensioning screw (9) forms the mounting of the camshaft adjuster (1) in relation to the camshaft (2).

Abstract: A driving stabilizer has a rotary actuator located between spider parts supporting stabilizer arms. Flanges associated with the spider parts and supported by the spider parts form end covers of the rotary actuator. A central part adjacent to the flanges includes an outer body formed by an annular jacket spanning a gap between the flanges and an inner body. The outer body and inner body are mutually rotatable and axially secured with respect to one another and each non-rotatably connected to a respective one of the spider parts via a respective one of the flanges.

Abstract: A rotary actuator that can be used in conjunction with drive stabilizers for motor vehicles. The rotary actuator includes an outer body forming a gas-tight connection for a first element capable of being turned opposite from a second element, and an inner body coaxial with the outer body and covered by the outer body axially over a full length of the inner body. The inner body and the outer body define an annular space and turn axially in opposite directions, the inner body forming a gas-tight connection for a second element. A sleeve is disposed in the annular space and includes an annular piston and a bushing axially connected to the annular piston, the annular piston moving on cylindrical surfaces of the inner body and the outer body. The annular piston defines two working chambers capable of being acted upon by pressure. The bushing includes oppositely-angles helical teeth on a radially inner on radial inner and outer sides which engage on the inner body and the outer body.

Abstract: In a process for producing a pin layer sequence on a perovskite of the type ABO.sub.3 which has AO layers, AO layers are converted such that a p-conductive B-oxide rich layer and, disposed therebetween an ABO.sub.3 layer with intrinsic conductivity are formed. Also, a perovskite of the type ABO.sub.3 with a layer sequence on the surface which includes an AO-enriched (ABO.sub.3)-layer, a B-oxide rich layer and disposed therebetween an ABO.sub.3 layer and an electronic building element comprising such a perovskite.

Abstract: On the (100) surface of a perovskite of the type ABO.sub.3, a Ruddlerden-Popper AO*(ABO.sub.3).sub.n layer is generated by exposing the perovskite to an oxidizing atmosphere at temperatures above 750.degree. C.

Abstract: The invention relates to a device for angularly adjusting an internal combustion engine camshaft in relation to a crankshaft and comprises an adjusting bushing connected to the camshaft, with an input sleeve surrounding said bushing, and with an actuator displaceably arranged there between. An input sleeve, the actuator, and the adjusting bushing are each provided with helical gear teeth to translate axial shifting of the actuator into relative rotation between the camshaft and crankshaft. In order to prevent rattling noises in the gear teeth that are caused by changing moments in the drive of the camshaft, the actuator is guided in stop-free fashion. A stop, which is effective between the input sleeve and camshaft, limits the angular adjustment so that the actuator is stressed between the input sleeve and camshaft to avoid backlash during rattling.

Abstract: An adjustable drive connection between an engine crankshaft and engine camshaft is provided by an electric motor connected to the camshaft via planetary gearing to cause relative rotation of an adjusting carrier in relation to a flanged shaft connected firmly to a camshaft. The carrier is fastened to this flanged shaft by means of a thread, so that its relative rotation with respect to the flange shaft is converted into an axial shafting of the carrier along the flange. An actuating element arranged on the carrier is likewise shifted axially. The axial shifting of the actuating element is converted into a relative rotation of the flanged shaft and a chain-wheel carrier driven by a crankshaft via helical teeth on the actuating element.

Abstract: A V-type internal combustion engine having two overhead camshafts per cylinder bank is provided with an absolutely synchronous rotational-angle adjustment between two inlet camshafts and the engine crankshaft to minimize torque fluctuations in the cam drive. One of the two camshafts actuating the inlet valves of the internal combustion engines has a device for the rotational-angle adjustment of this camshaft relative to the crankshaft and the two camshafts actuating the inlet valves are coupled to one another via a timing chain or a toothed belt which is in operative connection between an output side of the rotational-angle adjusting device and the other camshaft actuating the inlet valves.

Abstract: An angular adjustment is provided between a crankshaft and camshaft by a hydraulically operated rotary vane, which is pivotably mounted on the camshaft and is supported on a sprocket wheel carrier driven by a crankshaft rotation of the vane causing a relative rotation to take place between the crankshaft and camshaft. The rotary vane is held in each of its two end positions by a spring device.

Abstract: A device for providing angular adjustment between two drivingly connected shafts utilizes a positioning piston which can be moved axially between a driven sprocket wheel carrier and a flanged shaft connected to a camshaft so as to divide a hollow space formed by sprocket wheel carrier and flanged shaft into two working spaces. The positioning piston is positively connected both to the sprocket wheel carrier and to the flanged shaft via helical toothings. Depending on the position of a control piston arranged in the hollow flanged shaft, pressure oil is channelled out of the engine oil circuit into into one working space or the other and displaces the positioning piston in the axial direction. Via the two helical toothings, this longitudinal displacement of the positioning piston brings about a relative rotation of the camshaft with respect to the driven sprocket wheel carrier. Adjustment in both directions is effected by a hydraulic arrangement alone, without any auxiliary force.