Abstract: A process for producing a tread for a tire with a radially inner layer composed of a first rubber material and with a radially outer second layer composed of a second rubber material and forming the ground-contact surface of the pneumatic tire. The first rubber material has higher electrical conductivity than the second rubber material, and where, in a form of a web axially dividing the second layer around the periphery of the tire, the first rubber material extends radially outwards through the second layer as far as the ground-contact surface. A ply of the first and second layers are constructed radially one on the other, on a rotationally symmetric construction surface, on one of the two axial sides of the web to be produced.
Abstract: A pneumatic vehicle tire has a profiled tread, two side walls, and at least one protective rib running on the surface of the side wall over its circumference. The protective rib is disposed above and with a spacing distance from a side wall marking or a side wall decoration. The protective rib has a lower negative contour with at least one recess, which is configured to correspond to the positive contour of the side wall marking or side wall decoration facing the protective rib, such that the protective rib at least partially accommodates the upper half of the side wall marking or side wall decoration in the recess.
Abstract: A method for operating a control unit for heat-sensitive actuators includes first disabling the control unit after a thermal loading, which is calculated on the basis of the computing model, of at least one actuator has reached a threshold.
Abstract: An air spring has at least one working space which is filled with compressed air and which is delimited at least partially by a rolling bellows which is fastened at its ends to connecting parts. At least one of its ends, the air spring has a wall which is thicker in relation to the rest of the rolling bellows body, wherein the rolling bellows has, at least one of its thickened ends, a continuously vulcanized layer cover which is folded back to such a length that, after the assembly of the air spring, at least one region of the rolling bellows which is highly loaded by chassis forces falls into the region of the layer cover.
Abstract: Disclosed is an air spring device having a free-standing air spring bellows and an outer guide which is fastened to the air spring bellows by means of an inner clamping ring, wherein the outer diameter of the inner clamping ring is greater than the outer diameter of the air spring bellows in the unpressurized state, and the inner clamping ring generates a radially outwardly pointing encircling bulge in the unpressurized air spring bellows.
Abstract: An apparatus for upturning a tire-building component on a tire-building drum has a roller lever. To provide an apparatus which is capable of upturning a tire-building component on a tire-building drum, and which achieves the upturn of the tire-building component without defects, in particular unintended creasing in the side wall, it is proposed that, during the procedure of preparation for upturning, a spacer provides separation between the roller and the segment in such a way that the roller is in essence in contact exclusively with the tire-building component. The roller therefore rolls along the tire-building component.
Abstract: Disclosed is a pneumatic level control system equalizer of a motor vehicle equipped with a battery and a generator supplying the battery, as well as a compressor driven by an electric motor and associated with the level control system equalizer, the electric motor of the compressor being only supplied with electric current by the vehicle battery and/or generator in certain conditions. The power requirements of the level control system equalizer can be pre-evaluated for a change of level and/or a filling of the pressure tank to be performed.
Abstract: A tread for a vehicle tire, such as a pneumatic vehicle tire, is provided with an electrically conducting layer axially inside a portion of a first, radially outer rubber layer of the tread. The electrically conductive layer extends from a second, radially inner rubber layer of the tread on the radially inner side of the tread rubber material up to a ground contact surface of the tread. The rubber material of the electrically conducting layer and the rubber material of the radially inner rubber layer of the tread have a higher electrical conductivity than the rubber material of the radially outer rubber layer.
Abstract: A tread for a vehicle tire has an electrically conducting layer axially inside a portion of a first, radially outer rubber layer of the tread. The electrically conductive layer extends from a second, radially inner rubber layer of the tread on the radially inner side of the tread rubber material up to a ground contact surface of the tread. During the tire build-up, an accumulation of rubber material of higher electrical conductivity is built on a first rubber layer of higher electrical conductivity. The accumulation is formed into a ridge web and then less-conductive rubber is laid laterally next to the web, such that the web of rubber material reaches up to the ground contact surface in the finished vehicle tire. The web is shaped by forming rollers, by baffles, or by a forming ring with a corresponding shape.
Abstract: An air spring device having a folding bellows which protects the rolling fold against contaminants, the folding bellows being fastened to that end of the rolling piston which lies opposite the rolling fold, and surrounding the outer guide at least over the length of the latter.
Abstract: In a method for controlling operation of a compressor, the compressor is shut off by a control device in order to prevent thermal damages when an estimated temperature value Ts calculated by said control device exceeds an upper threshold value Tmax while the compressor remains on or is allowed to be turned on when there is a need for compression and a lower threshold value Tmin is not reached. In order to be able to more accurately estimate the estimated temperature and increase the thermal availability of the compressor, the estimated temperature value Ts is indirectly and cyclically determined by means of a mathematical-physical model that characterizes the cooling and heating properties of the compressor.
Abstract: A self-sealing pneumatic tire has a sealing band (3) applied adheringly in the circumferential direction on the inner side of the tire and radially within the tread. A sealant (2) is applied to a carrier material (1). The carrier material (1) of the sealing band (3) is a foil on which the sealant (2) has been applied. The sealant, because of its intrinsic stickiness, adheres both to the carrier material (1) and to the inner side of the tire.
Abstract: A sealing ring for a vehicle wheel having a tubeless tire with two tire beads that are embodied on the radially inward side thereof. The tubeless tire is mounted on the radially outer side of the multipart rim by the tire beads. The vehicle wheel further comprising a sealing ring which seals the tire radially inward towards the ring, is positioned on the radially outer side of the rim, extends in a peripheral direction along the circumference of the rim and runs between the two tire beads in an axial direction. The sealing ring is configured with a central ring member which is provided with a cylindrical inner surface that is to rest on the outer surface of the rim while being embodied with one respective concentric flexible annular leg which is located on both axial sides of the central ring member and extends diagonally and radially outward in an axial direction from the central ring member.
Abstract: An air spring and damper unit for vehicles has, as operating spaces, at least two pressure spaces filled with compressed air and connected to one another via flow channels. The pressure spaces have movable walls in the form of rolling bellows or folding bellows, wherein a pilot-controlled main valve which can be loaded with a control pressure on the low-pressure side is configured at least in one flow direction in a first flow channel.
Abstract: A compressor unit is particularly suitable for compressing air in portable and/or transportable devices. The compressor unit includes a motor, a compressor, and a pressure gauge (manometer). The pressure gauge is connected to the compressor unit through a threaded connection and the supply of the pressure medium to the pressure gauge travels through the threads.
Abstract: A method for winding up and splicing a tire building component, comprising placing the tire building component on a winding drum having a winding drum main axis and an inclinationally-adjustable surface, which is adjustable in inclination relative to the winding drum main axis, rotating the winding drum to rotationally symmetrically wind up the tire building component, and splicing together free ends of the tire building component to form a closed ring.
Abstract: Disclosed is a ride level control system for a motor vehicle composed of a pneumatic spring (1), a connecting line (3) which connects the pneumatic spring (1) to an atmospheric port (5), and a first valve (2) which, in a first switched state, disconnects the connecting line (3) and, in a second switched state, clears it, wherein a vessel (4) is arranged in the connecting line (3) between the first valve (2) and the atmospheric port (5).