Abstract: A pressure-limiting valve has a valve housing, a piston, a pressure-limiting adjustment spring, at least one inlet and at least one outlet. The piston can assume an open position in which the inlet and the outlet are connected to each other and a closed position which separates the inlet and outlet. A first piston ring has a sealing surface and has a small pneumatic active surface relative to a second piston ring. Between the first and second piston rings the piston has a substantially truncated cone-like portion which tapers toward the first piston ring. In the closed position, the sealing surface of the first piston ring is sealingly drawn against a housing collar by a pneumatic force acting counter to the force of the pressure-limiting adjustment spring. A pneumatic passage for creating a safety valve function closable by a spring-loaded safety valve body is provided in the piston.

Abstract: A method and apparatus is provided for regulating stable operation of an exhaust-gas turbocharger of an internal combustion engine having a fresh-gas supply device, a switchover valve, a control device, a compressor for generating compressed air and an air-processing unit with a discharge valve. The compressor is operated in a suction intake mode in which the compressor is connected to an air inlet, and based on monitored operating parameters, the switchover valve switches the compressor from the suction intake mode into a pressure-charged in which the compressor is connected to an exhaust-gas turbocharger compressor. Based on monitored operating parameters when in the pressure-charged mode, the switchover valve switches the compressor from the pressure-charged mode into the suction intake mode.

Abstract: A pneumatic disc brake has a brake caliper extending over a brake disc, wherein a brake cylinder, to which compressed air can be applied, and at least one further functional part are fastened on a flange of the brake caliper. The brake cylinder is provided with at least one indentation at least in the overlapping region with the at least one functional part.

Abstract: A brake pad for a disc brake, in particular for a utility or commercial vehicle, including a pad retaining spring which is designed as an arc-shaped leaf spring, can deflect radially and is fastened by way of a hood to a lining carrier plate which supports a friction lining material. The hood is formed as a separate component and has a section which is U-shaped in cross-section. A web of the hood connects its limbs which limbs are guided in parallel and at both sides of the lining carrier plate. The web bears against the pad retaining spring. The pad retaining spring is designed such that an opening is formed through which a limb of the hood is guided.

Abstract: A combined service brake and the stored-energy brake cylinder is provided, in which a ventilation valve which forms or shuts off a flow connection between the spring chamber and the service brake chamber of the brake cylinder ensures that disruptive noise is avoided while also preventing loss of air volume for building up the service brake force.

Abstract: A compressed air supply device for a utility vehicle includes a valve housing and an air-drying cartridge, wherein compressed air can be supplied to the air-drying cartridge via the valve housing. The compressed air flows through the air-drying cartridge in a first direction of flow. An electrically controllable valve is provided in the valve housing, which ensures a return flow of compressed air counter to the first direction of flow through the air-drying cartridge for regeneration purposes. A valve that can be controlled pneumatically by the electrically controlled valve is provided in the valve housing, via which compressed air can be supplied to the air-drying cartridge for regeneration purposes.

Abstract: An adjusting device for adjusting the wear of the friction surface on the brake lining and brake disc of a pneumatic disc brake having a clamping device that is actuated by a rotary lever is provided. The device preferably can be inserted into a rotary spindle of the disc brake. An anti-friction body is positioned on both axial sides of a drive element, with the one bodies being a ramp coupling with a freewheeling function. The ramp coupling has coupling bushes and clamping balls, and the coupling bush on the driven side being supported on a spring sleeve. A conical seat is configured between the coupling bush and the sprung sleeve cooperates with the ramp coupling to preclude locking of the coupling bushes.

Abstract: A part-lining disk brake is described, having an electromechanical actuator, a self-energizing application device with a wedge arrangement designed to press a brake lining against a disk brake, and at least two wedge elements of the wedge arrangement moveable relative to one another, arranged on one of a brake caliper frame and an auxiliary frame. The wedge elements are used to apply the brake lining, and act on the brake lining via a trapezoidal pressure plate.

Abstract: An electropneumatic central unit for a commercial vehicle is made up of modules with electrical and/or pneumatic components. The individual modules are arranged in module housings detachably connected to each other in a defined position, on which standard pneumatic connectors and electrical connectors are arranged such that, on connection of the module housings, corresponding connectors, arranged on opposing connection surfaces of the module housings, form direct mutual electrical and pneumatic connections.

Abstract: A device for supplying pressure from an energy storage device to a piston gear shifting actuator by way of a valve device is provided. A pressure regulating and/or control device is used to regulate and/or control the pressure applied to the piston actuator. The pressure regulating and/or control device regulates and/or controls the pressure according to at least one following quantity: temperature, in particular a transmission operating temperature, the load state of the motor vehicle provided with the transmission, and the slope of a surface along which the motor vehicle provided with the transmission runs.

Abstract: A spring-loaded piston is produced from plastic, particularly by injection molding. The spring-loaded piston is developed in the area of a connection to a piston or piston rod such that tilting of the spring-loaded piston with respect to the piston rod is prevented and a sufficiently firm connection is ensured. In addition, the spring-loaded piston 1 may include a reinforcing insert by which clearly higher forces can be transmitted while maintaining smaller wall thicknesses than in conventional spring-loaded pistons. Also, the seat or contact surface in the spring-loaded piston is constructed for supporting the preloaded spring such that possibly occurring radial forces do not have any negative influence on the functionality of the spring-loaded piston.