Abstract: An adjustable camshaft can be used in valve drives of internal combustion engines, amongst other places. The adjustable camshaft may include an outer shaft and an inner shaft that is concentric with and rotatably supported in the outer shaft. A cam having a cam bore may be rotatably supported on an outer surface of the outer shaft so as to form a slide bearing gap between the cam and the outer shaft. The cam may be rotatably-fixed to the inner shaft so that the inner shaft and the cam rotate with one another. Furthermore, the adjustable camshaft may include an oil channeling groove disposed beneath the cam in the outer surface of the outer shaft. In many cases, at least one side of the oil channeling groove may be exposed such that it extends beyond the slide bearing gap and the cam.

Abstract: The present invention relates to a method for the production of a biocompatible matrix the method comprising: a) providing a composition comprising at least one biopolymer; b) extruding the composition into a layer through a slit onto a surface, wherein the slit moves over the surface; c) optionally freezing the layer; d) optionally repeating the process to add one or more further layers; e) freezing the composition or compositions after extrusion; f) optionally drying the frozen composition wherein preferably the surface can be cooled. The invention further relates to a biocompatible matrix obtainable by the method as well as to the use of a matrix obtainable by the method for medical or cosmetic purposes.

Abstract: A method may be used to adjust a gap between a stator and a rotor of a phase shifter for an adjustable camshaft. The stator may be connected to an outer shaft, and the rotor may be connected to an inner shaft of the adjustable camshaft. When the rotor rotates in the stator, a phase position of the inner shaft is adjusted relative to a phase position of the outer shaft. A gap may be formed between sliding surfaces on the stator and rotor. The method may involve coating at least one of the sliding surfaces with a removable coating, assembling the phase shifter including a joining of the rotor in the stator, starting up the phase shifter by rotating the rotor in the stator, and adjusting the gap between the stator and the rotor by way of abrasion of at least a partial thickness of the coating.

Abstract: The present invention relates to a method for the production of a biopolymer, wherein the biopolymer has a defined average molecular weight, the method comprising lyophylizing a composition comprising the biopolymer with native high molecular weight, optionally purifying and/or isolating the biopolymer; wherein the temperature during the sublimation process is selected to facilitate a controlled and defined degradation of said biopolymer.

Abstract: A valve control system may include an adjustable camshaft that includes an outer shaft and an inner shaft that extends through the outer shaft. The valve control system may further include a phase shifter that comprises a first control element and a second control element that can be rotated relative to the first control element. The outer shaft and the inner shaft may each be connected with a control element. The valve control system may also include a stop coupled with the outer shaft in a torque-proof manner, as well as a counter-stop coupled with the inner shaft in a torque-proof manner. A maximal angle of rotation of the inner shaft in the outer shaft may be determined by the stop bordering on the counter-stop.

Abstract: An adjustable camshaft for a valve train of an internal combustion engine may include an inner shaft that is rotatable in an outer shaft, a phase shifter by which the outer shaft and/or the inner shaft are/is adjustable in a phase position formed around an axis of rotation, and a bearing portion for bearing the camshaft, via which the phase shifter can be supplied with a pressurizing medium. The inner shaft may comprise an end on which a screw flange is arranged, and a rotor of the phase shifter may be connected to the screw flange. A free end of the inner shaft comprises a duct that coincides with the axis of rotation for at least partially supplying the phase shifter with a pressurizing medium. The duct may extend at least into the bearing portion.

Abstract: A camshaft may include a shaft on which at least one sliding element is received in such a way as to be axially displaceable along a shaft axis. The shaft may comprise an external longitudinal spline structure that meshes with an internal spline structure of a passage in the sliding element such that the sliding element is arranged in a rotationally fixed manner on the shaft. The sliding element, on its axial end faces, may comprise guiding portions by way of which the sliding element is guided on the shaft to minimize an axial offset of the sliding element. Further, guiding sleeves against which the guiding portions of the sliding element are supported may be received on the shaft.

Abstract: A brake system for a vehicle having a master brake cylinder, which provides a pressure signal, having a brake-medium reservoir connected to the master brake cylinder, and a first brake circuit, which is coupled by a first input to the master brake cylinder and by a second input to the brake-medium reservoir, and having at least one first wheel-brake cylinder, which is mounted at a first wheel, in order to exert a force corresponding to the pressure signal onto the first wheel, and having a separator valve, which is configured between the first input and the first wheel-brake cylinder, to prevent further transmission of the pressure signal upon receipt of a supplied closing signal; and having a control valve, which is configured between the first input and the first wheel-brake cylinder; in order to control an inflow of a brake medium from brake-medium reservoir to the first wheel-brake cylinder. In addition, a method for controlling a corresponding brake system is also described.

Abstract: A hydraulic braking system having: at least one wheel brake cylinder; a primary brake pressure generator that is disconnectably hydraulically coupled to the at least one wheel brake cylinder and is embodied to impinge upon the at least one wheel brake cylinder with pressure by way of a hydraulic fluid; a brake master cylinder that has at least one first pressure chamber and to which at least one wheel brake cylinder is hydraulically coupled; and a secondary brake pressure generator that is coupled to the first pressure chamber of the brake master cylinder and is embodied to impinge upon the first pressure chamber of the brake master cylinder with pressure, the secondary brake pressure generator being controllable independently of the primary brake pressure generator. Also disclosed is a related method.

Abstract: The invention relates to a camshaft comprising a support shaft formed as a hollow shaft. An inner shaft is arranged concentrically in the interior of the support shaft, wherein the inner shaft is rotatable relative to the support shaft. There is arranged on the support shaft a first cam segment with a first recess for receiving the support shaft, which cam segment is rotatable with respect to the support shaft and is connected in a rotationally conjoint manner to the inner shaft via a first opening in the support shaft. The first cam segment has at least two cam contours. The connection between the inner shaft and the first cam segment is furthermore configured such that the first cam segment is axially displaceable relative to the inner shaft and to the support shaft.

Abstract: A hammer drill comprising: a body; a motor mounted within the body; a transmission housing mounted within the body, a transmission mechanism mounted within the transmission housing which is capable of rotatably driving and/or repetitively striking a cutting tool held by the hammer drill in response to rotation of an output shaft of the motor; wherein the transmission housing comprises a pair of housing portions adapted to engage each other to support the component parts of the transmission mechanism within the transmission housing; wherein the first housing portion is made from metal and the second housing portion is made from a plastic material, each of the components of the transmission mechanism being supported jointly be the first and second housing portions.

Abstract: The present invention relates to a braking device and to a braking system, each having a master brake cylinder (10) having at least one first pressure chamber (12) that is subdivided or is able to be subdivided at least into a first partial volume (12a) and a second partial volume (12b), which are hydraulically connectable or connected to a brake fluid reservoir (24), a first brake circuit (28) being hydraulically connectable or connected to the first partial volume (12a), and having a valve device (38) that is mechanically designed in such a way that a pressure buildup up to a mechanically specified limit pressure may be brought about in the second partial volume (12b), brake fluid being transferable at least into the first brake circuit (28) via at least one subcomponent (38a) of the valve device (38), and an exceeding of the limit pressure in the second partial volume (12b) being prevented.

Abstract: An adjustable camshaft for a valve drive of an internal combustion engine may include an inner shaft extending through an outer shaft with a cam element disposed on the outer shaft. The cam element may be connected rotationally conjointly to the inner shaft. The cam element may have a shaft passage with an internal bearing surface, which, together with a bearing surface on an outer side of the outer shaft, forms a plain bearing arrangement for the rotatable arrangement of the cam element on the outer shaft. The bearing surface on the outer side of the outer shaft and/or the internal bearing surface of the shaft passage of the cam element may include one or more sections with a spherical shape.

Abstract: A method for blending a generator braking torque of a generator of a recuperative brake system having two brake circuits, including: controlling one of the at least two brake circuits of the brake system in a blending mode, a hydraulic connection between a master brake cylinder of the brake system and a storage volume of the brake circuit controlled in the blending mode being at least temporarily enabled, so that brake fluid is transferred from the master brake cylinder into the storage volume of the brake circuit controlled in the blending mode; and controlling another of the at least two brake circuits in a non-blending mode, a hydraulic connection between the master brake cylinder and a storage volume of the brake circuit controlled in the non-blending mode being interrupted during the non-blending mode. Also described is a control device for a recuperative brake system having two brake circuits.

Abstract: An adjustable camshaft can be used in a valve drive of an internal combustion engine. The adjustable camshaft may include an inner shaft rotatably supported by and concentric with an outer shaft. A cam element may be rotatably supported on the outer shaft such that the outer shaft extends through a cam bore of the cam element. The cam element may be rotatably-fixed to the inner shaft, in some cases, by way of a bolt. Further, a bearing sleeve that is rotatably-fixed to the cam element may be inserted within the cam bore such that a slide bearing gap is formed between the bearing sleeve and the outer shaft. Furthermore, in some examples the cam element may be a collared cam that has a cam base body and a cam collar adjacent to one another.

Abstract: A control device for a brake system of a vehicle includes an electronic device configured to perform a method including determining, taking into account a specified braking of a driver of the vehicle or of an automatic control system of the vehicle, a first item of information regarding a current usability of a hydraulic device of the brake system and a second item of information regarding a current usability of a brake booster of the brake system, which first target portion of a brake pressure increase is to be provided by the hydraulic device, and which second target portion of the brake pressure increase is to be provided by the brake booster, and controlling the hydraulic device and/or the brake booster so that the first target portion of the brake pressure increase is provided by the hydraulic device and the second target portion is provided by the brake booster.

Abstract: A method for operating a regenerative braking system of a vehicle includes: applying control to at least one valve of a brake circuit, before and/or during operation of a generator of the braking system, so that brake fluid is displaced out of a brake master cylinder and/or out of the at least one brake circuit into at least one reservoir volume; defining a target force difference variable regarding a booster force exerted by a brake booster in consideration of at least one of a generator braking torque information item, a brake master cylinder pressure variable, and an evaluation variable derived from at least the generator braking torque information item or the brake master cylinder pressure variable; and controlling the brake booster in consideration of the defined target force difference variable.

Abstract: A valve train for actuating gas exchange valves of an internal combustion engine may include a first camshaft that is received such that it can be rotated in a first shaft axis, and a second camshaft that is received such that it can be rotated in a second shaft axis. At least one of the camshafts may be configured as an adjustable camshaft that comprises an outer shaft in which an inner shaft is received such that it can be rotated. At least one of the camshafts may be drive-connected via a drive means to a crankshaft of the internal combustion engine. A phase shifting member may be provided by way of which the phase position of at least one inner shaft can be changed relative to the phase position of at least one outer shaft of the camshaft. The phase shifting member may comprise an arrangement that is spaced apart from both shaft axes.

Abstract: A camshaft may include a shaft on which at least one sliding element is received in such a way as to be axially displaceable along a shaft axis. The shaft may comprise an external longitudinal spline structure that meshes with an internal spline structure of a passage in the sliding element such that the sliding element is arranged in a rotationally fixed manner on the shaft. The sliding element, on its axial end faces, may comprise guiding portions by way of which the sliding element is guided on the shaft to minimize an axial offset of the sliding element. Further, guiding sleeves against which the guiding portions of the sliding element are supported may be received on the shaft.

Abstract: A hydraulic block of a hydraulic multi-circuit vehicle braking system having braking force regulation includes an installation space for a hydraulic reservoir of the vehicle braking system that is isolated from a braking circuit, for example by closing a connecting line using a pressed-in ball. The installation space is connected to another braking circuit via an additional bore, wherein a larger storage volume is available to the braking circuit as a result. The necessary changes to the hydraulic block are small.