Abstract: According to a method for controlling the air volume in a closed pneumatic spring system of a vehicle, an air-powered pump supplies at least two pneumatic springs and/or a compressed air reservoir with a specific air volume as needed such that the air pressure prevailing in the respective pneumatic spring and/or the compressed air reservoir is at a level which causes a vehicle body resting on the pneumatic spring to be positioned at a desired distance from the roadway or the vehicle axle.

Abstract: A vehicle wheel with a wheel rim and a solid tire positioned on the wheel rim. The vehicle wheel has an annular upper shell having a first wedge-shaped surface and composed of at least two upper segments. Further, the vehicle wheel includes an annular lower shell composed of lower segments and having an outer circumference having a second wedge-shaped surface. Moreover, the second wedge-shaped surface is structured and arranged in a diametrically opposed manner to the first wedge-shaped surface. Additionally, the annular lower shell is arranged on the rim, the annular lower shell is arranged against the annular upper shell, and the annular upper shell is connected to the solid tire.

Abstract: An air spring for a vehicle suspension, in which air spring the bellows is fastened by way of deformable annular components to the periphery of connection parts. The annular component is fastened at one end of the bellows, to the outer periphery of the connection part in axially spaced-apart clamping regions so as to form an encircling cavity, The annular component, on its outer side, is formed with a rolling contour for the bellows.

Abstract: Method and apparatus for positioning bead cores during a building of a radial tire carcass in a tire-building machine. The method includes positioning first and second bead cores on respective first and second core-centering devices, on a first side of a carcass drum and centering the first and second bead cores. Further, the method includes grasping, with a second core-setting device, the second bead core and transporting the second core-setting device and the second bead core to a second side of the carcass drum. Additionally, the method includes grasping, with a first core-setting device, the first bead core; and setting the first and second bead cores onto the tire carcass by the first and second core-setting devices.

Abstract: A method for detecting locking states in communication and/or control appliances (SGi) dispersedly networked together by a data bus (2) compares a message currently transmitted by a communication and/or control appliance (SGi) to a previously transmitted message. It determines and the absence of a locking state of the communication and/or control appliance (SGi) if the messages are different. A message counter is encoded in the transmitted message if the messages are identical and decodes the message counter in a communication and/or control appliance (SGi) receiving the message. It determines the absence of a locking state at the communication and/control appliance (SGi) if the value of the message counter has changed relative to a previous value of the message counter of a previously transmitted message and determines a locking state of the communication and/or control appliance (SGi) if the message counter value has not changed after a specific waiting time (tw).

Abstract: Vehicle tires, particularly for commercial vehicles, contain a profiled tread, which is broken down into profiled ribs or block rows by a number of peripheral grooves and is made of a first rubber mixture. A groove base of the peripheral grooves is made of a second rubber mixture, and the modulus of elasticity of the second rubber mixture is less than the modulus of elasticity of the first rubber mixture of the main part of the tread. In particular, the second rubber mixture has a modulus M 100%, which is 5% to 20% less than the modulus M 100% of the first rubber mixture of the main part of the tread. The two rubber mixtures are based on a substantially identical or comparable polymer system.

Abstract: In order to avoid pressure and volume compensation as much as possible during measurement of the pressures of air spring units, the pressure in the air spring units (5, 6, 7, 8) is estimated prior to measurement of the pressures of the air spring units (5, 6, 7, 8) and is compared to the pressure in the air pressure accumulator (3). The higher of the two pressures determines the position of a 3/2 directional control valve (11) which separates the collector line (25) connecting all air spring units (5, 6, 7, 8) from the air pressure accumulator (3) or which connects it to as small a chamber volume of the supply system as possible.

Abstract: A reinforcement layer for elastomeric products, in particular for the belt bandage of pneumatic vehicle tires, are hybrid cords which are arranged generally parallel to one another inside the layer and are composed of a first twisted textile yarn made of a first material and a second twisted textile yarn made of a second material. The ends of both yarns are twisted with each other and the first twisted textile yarn is a polyketone yarn. The reinforcement layer of hybrid cords for elastomeric products, in particular for the belt bandage of pneumatic vehicle tires, has a force-extension behavior that, when using the reinforcement layer as a belt bandage in pneumatic vehicle tires, ensures the simple production of tires, including vulcanization, and a great suitability to high speeds. To this end, the second twisted textile yarn is an aramid yarn.

Abstract: Device and method for building a radial tire. The device includes a first drum device for building a belt package and a transfer device for transferring the belt package from the first drum device to a second drum device having arranged thereon a carcass tube from at least one airtight inner layer, a carcass play and two bead cores with core profiles. The second drum device is arranged between core clamping devices and is structured and arranged to join the carcass tube and the belt package during expansion of the second drum device. The belt package is contoured or shaped by deformation via the second drum device. This abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.