Abstract: The invention proposes an intermediate lever (1) for a variable valve train of an internal combustion engine, said intermediate lever (1) comprising a loading end (2) and a pivoting end (3), a cam contacting surface (4) and a support (5) for a resetting spring (6), the loading end (2) extending on a front end of the intermediate lever (1) and comprising a sliding surface (7) for making contact with a lever-type valve opener, the pivoting end (3) being designed so as to cooperate with eccentric means for affecting a change of position of the intermediate lever (1), and the cam contacting surface (4) being arranged between the loading end (2) and the pivoting end (3), wherein the intermediate lever (1) is made of a thin-walled sheet metal and is manufactured substantially by a punching plus bending method and wherein the support (5) is arranged on an upper side (8, 9) of the intermediate lever (1) in an edge region (10) adjoining the loading end (2) and has a convex portion extending towards the upper side (8,

Abstract: The invention proposes a coupling mechanism (1) for relatively movable elements (2, 3) of a switchable cam follower (4) of a valve train of an internal combustion engine, a high lift being obtainable upon coupling of said elements (2, 3) and a lift smaller than the high lift being obtainable upon uncoupling of said elements (2, 3), a first one (2) of said elements comprising a guide bore (5) for at least one coupling piston (6) which, for achieving coupling, can be displaced partly beyond a parting surface (7) between said elements (2, 3) into an aligned reception (8) of a second one (3) of said elements, wherein upon cam lift and coupling of said elements (2, 3), a contact zone (9) between the piston (6) and the reception (8) is clearly spaced from an edge section (10) of the reception (8) on the parting surface (7). This can be implemented in practice, for instance, through a special “backwards” oriented flattened portion (14) on the piston (6). Material loading on the edge section (10) is thus avoided.

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 internal combustion engine having a device for hydraulically adjusting the angle of rotation of the camshaft thereof relative to the crankshaft thereof is provided, which also includes a vacuum pump for a servo load. The device includes a drive unit that is connected in a driving manner to the crankshaft and an output unit which is connected in a torsion-proof manner to the camshaft. The lubricating oil of the internal combustion engine, which is fed from a radial bearing of the camshaft in the cylinder head, is used as a hydraulic pressurizing medium for the device. Thee vacuum pump includes a housing that has a flanged connection to the cylinder head cover, and a rotor that is disposed therein and is provided with a drive shaft via which the vacuum pump is driven and lubricated. The vacuum pump is arranged in an axial direction relative to the device, while the device is provided with additional coupling elements via which the drive shaft od the vacuum pump is connected in a driving manner to the device.

Abstract: In a feed unit of a rod-type actuating element that is arranged in a housing (2) and guided for axial displacement relative to the housing (2), the feed unit further being a drive motor (4) that effects the displacement of the actuating element through a driving device that is rotatably retained in bearings in the housing (2), said driving device being a threaded spindle (1) and a spindle nut (3) surrounding the threaded spindle, wherein the drive motor (4) with its stator (5) and rotor (6) is arranged in the housing (2), and the spindle nut (3) is coaxially arranged in and fixed to a hollow shaft (7) that is surrounded by and fixed to the rotor (6).

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 deflection pulley (1), intended for a traction drive, which includes a rolling-contact bearing as well as a ring body (4). A securing screw (8) as well as a spacer sleeve (9) serve as retaining elements. In order to provide a transport safety system (17), the spacer sleeve (9) is provided with at least one radial inwardly directed projection (18) which radially overlaps a threaded section (20) of the securing screw (8).

Abstract: A coupling arrangement (1) with a first clamping ring (10) concentric to the axis of rotation (1a), a second clamping ring (20) oriented concentrically with the axis of rotation and grooved around its circumference, and with clamping bodies (30) oriented radially between the clamping rings (10, 20); which includes on at least one of the clamping rings projections (11) that are built into a shape like a ramp (10, 20), each of which is placed between two neighboring clamping bodies; and which includes a first retainer (15) and a second retainer (25), with which the clamping rings (10, 20) and the clamps (30) are held together.

Abstract: A switching element (1) for a valve drive of an internal combustion engine is provided, preferably for deactivating a valve. The switching element has an outer section (2), in addition to an inner element (4) that can be axially displaced in a bore (3) of the outer section. The outer section (2) and the inner element (4) are displaced away from one another by action of lost-motion spring elements (5) and can be coupled together in an axially-distant relative position, whereby at least one piston (6), which is situated in a bore (7) that runs transversally through the inner element (4), acts as a coupling element. An annular groove (8), into which the piston (6) can be partially displaced to adopt its coupling position, is located in the bore (3) of the outer section (2).

Abstract: An electrically assisted, power steering system for motor vehicles having an input shaft (6) connected to a pinion shaft (2) by a torsionally elastic member (5) is supported in a steering housing (1) by a rolling bearing. The rolling bearing is formed as an elastic, flexible roller bearing (13), whose cylinder rollers (13.5, 13.6) have at least at one peripheral position an elastically deformable cylinder roller (13.6), having a diameter that is slightly greater than a diameter of the other cylinder rollers (13.5). In this way, an exact guidance of the input shaft (6) is achieved, so that the applied steering torque can be used accurately by an evaluation unit (15) for controlling the servo motor (7).

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: This invention is a method dedicated to pseudo-invariant features retrieval and, more particularly, applied to content-based copy identification. The range of a query is computed during the search according to deviation statistics between original and observed features. This approximate search range is directly mapped onto a Hilbert's space-filling curve allowing an efficient access to the database. Such a method is sublinear in database size and does not suffer from dimensionality problems.

Abstract: A method and computerized system for reducing risk actually assumed by at least one of a plurality of parties, wherein at least one of the parties supplies electric power to at least one other of the parties, and if an unplanned at least partial failure to supply the electric power occurs, at least one of the parties assumes the risk. The method includes designating at least one factor associated with the supplying of electric power and for determining whether an unplanned at least partial failure to supply the electric power that occurs is a qualifying event; designating a compensation which will at least partially reduce the risk actually assumed by the at least one of the parties assuming the risk if the unplanned at least partial failure to supply the electric power occurs and is determined to be a qualifying event; and, establishing a relationship between the at least one of the parties assuming the risk and at least one other party.

Abstract: A rotary disk which is rotatable through a rotation angle around a rotation axis, which includes a rotary disk contour having at least one elevation and a predetermined number of teeth arranged on the rotary disk contour with respective midpoints is provided. The midpoints of respective adjacent teeth having a predetermined spacing, a rotary disk radius which depends functionally on the angle of rotation in an average radius, and a rotary disk wrapping curve resulting therefrom, the average radius being chosen such that an arc length running around the rotary disk wrapping curve is equal to the product of the predetermined spacing of the midpoints of adjacent teeth and the number of teeth. A corresponding method for designing at least one rotary disk for a timing control drive, rotatable through a rotation angle around a rotation axis, is also provided.

Abstract: A valve drive (1) for a cam-operated valve (2) of an internal combustion engine is provided, in which a closing force is applied to the valve (2) against the opening direction of the valve (2) by a valve spring (3). The valve drive includes a hydraulic force application device (4), with which a force can be applied directly or indirectly against the direction of the closing force onto the valve (2), and includes a piston (5) that is moveable in a displacement direction (R) relative to a cylinder (6) of the force application device (4) by the introduction of hydraulic fluid into the pressure chamber (7) formed between the piston (5) and the cylinder (6). The piston (5) can move relative to the cylinder (6) from a first end position (A) into a second end position (B).

Abstract: An electromagnetic hydraulic valve having an electromagnet with a coil winding arranged on a spool, and a magnet housing, a valve stem having a pressure connection, a tank connection and a consumer connection. The spool and the valve stem are a one-piece plastic body which has an axial longitudinal bore which is an armature space for a magnet armature and also is a control region for a closing body. The magnet housing, with a collar which projects into the longitudinal bore, forms a top magnet pole of the electromagnet. A bottom magnet pole, connected to the magnet housing in a magnetically conductive manner, of the electromagnet likewise projects into the longitudinal bore of the plastic body.

Abstract: A method of forming a liner for a passage such as a sewer includes forming panels composing the liner using a neat resin of a first density and a polymer concrete of a second, higher density. The neat resin is inserted into a mold cavity before the polymer concrete and is displaced upwardly by the polymer concrete pour to impregnate a fiber layer disposed along the periphery of the mold cavity. Resulting panels preferably have an offset joint to increase the joint strength between upper and lower panels forming the liner.

Abstract: In a ball screw drive comprising a spindle (1), a nut (3) surrounding the spindle (1), and balls (4) arranged between the spindle (1) and the nut (3), which balls (4) are in rolling contact with a screw track (2) formed on the spindle (1) and on corresponding screw tracks (7, 12) formed on rings arranged within the nut (3) comprises a deflecting region for returning the balls (4) from a run-out end of a common turn of the screw tracks (2, 7, 12) to a run-in end of this turn, the screw tracks (7, 12) of the rings arranged in the nut (3, 15) are made on front faces of these rings with the screw tracks (7, 12) of two adjacent rings defining together with the screw track (2) of the spindle (1, 18), an endless circulation channel for the balls (4).

Abstract: A process for optimized design of a tension means drive having at least one non-circular pulley on an internal combustion engine, in which the pulley is controlled in position such that upon dynamic superposition of an excitation of the tension means drive during driving resulting from the pulley shape with at least one further excitation of the tension means drive, a specific overall excitation of the tension means drive results. The invention furthermore relates to a corresponding computer system.

Abstract: A device (1) for the hydraulic adjustment of the angle of rotation of a camshaft (3) in relation to a crankshaft of an internal combustion engine, situated at the drive-side end (2) of the camshaft (3) and formed of a drive unit (4) that stands in a driven connection with the crankshaft and an output unit (5) that is connected in rotationally fixed fashion with the camshaft (3) is provided. The drive unit (4) stands in a force-transmitting connection with the output unit (5) via at least two pressure chambers (6, 7) formed inside the device (1), the supply of pressure medium to the pressure chambers (6, 7) taking place via a separate distributor housing (8) that has a connecting flange (10) suitable for transmitting pressure medium to the device (1) and a control valve receptacle (9) that is connected to the connecting flange (10) via two pressure medium conduits (11, 12).