Abstract: A method for detection of a variable parameter of a vehicle with the aid of a measurement device, by which measured values are evaluated as sensor signals of at least one sensor element which is arranged in the immediate vicinity of an actuating element with an electrical drive, in which no evaluation of the measured values is carried out or performed during an influencing time period between a time of a change in the electrical drive for the actuating element and a time in which this change is essentially still just exerting an influence on the measured values.

Abstract: A water-cooled piston compressor having at least one air-compressing piston, which can be driven with means for producing a linearly oscillating drive force and which is accommodated in an axially movable manner in a cylinder housing which is closed at the end face via a cylinder head and is provided with water-cooling means, wherein the water-cooling means comprise a cylinder housing which is formed with a double wall and on whose end face facing the cylinder head a plurality of cooling openings are arranged, via which coolant flowing through the double-walled cylinder housing comes into contact with the region of the cylinder head.

Abstract: A circuit configuration for inductive displacement measurement using a sensor whose inductance changes as a function of the displacement to be measured, and having an evaluation circuit to which the sensor is connected. The sensor is connected between a first operational amplifier and a series connection of a second operational amplifier and a resistor. The first operational amplifier is switchable over between two specified voltages and the second operational amplifier is operable to adjust a specified constant voltage at the connecting point between the resistor and the sensor, and the output of the second operational amplifier is connected to an input of a comparator whose other input is switchable over between two specified voltages. The output signal of the comparator effecting the switchover of these voltages and the voltages of the first operational amplifier, and is the measuring output signal of the circuit configuration at the same time.

Abstract: A sensor device for measuring the compression travel and/or the compression rate of wheels and/or axles of vehicles, in particular of commercial vehicles, may include at least one sensor measuring in a contactless manner. The sensor device may include a radar and/or high-frequency sensor generating a beam, which is emitted and received after reflection at a reference and reflection surface.

Abstract: An air-suspension device for vehicles, e.g., commercial vehicles, includes a valve block that is assigned to a rear axle and contains a central valve for aerating and venting air-spring bellows of the rear axle, and a valve block assigned to a front axle for aerating and venting air-spring bellows of the front axle. The central valve of the valve block assigned to the rear axle selectively connects: a) a compressed-air supply to the air-spring bellows of the rear axle and to a supply-pressure connection of the valve block assigned to the front axle; or b) the supply-pressure connection of the valve block assigned to the front axle and the air-spring bellows of the rear axle to an air vent. The valve block assigned to the front axle has a pneumatic pilot-operation connection for pneumatic-electric pilot operation.

Abstract: The invention relates to an automotive braking system which is actuated by a pressure fluid, comprising at least one first brake circuit and a second brake circuit, whereby a first brake cylinder and a second brake cylinder are associated with the second brake circuit and can be connected to a second pressure liquid source for the second brake circuit via a second control valve device according to a control signal provided by a multicircuit braking transmitter. A reversing valve arrangement is arranged between the second control valve device and the first brake cylinder, whereby a valve actuating member can be pressure controlled by the control signal associated with the first brake circuit in such that the first brake cylinder can be connected to a pressure fluid source which is independent with respect to the pressure fluid source of the second brake circuit. A switching device is shifted into a blocking state when anti-slip braking occurs.

Abstract: A compressed-air processing system, notably for motor vehicles, includes, in a housing, an electromagnetic pressure regulator and a multicircuit safety valve having at least one load circuit connected to it. Each load circuit can be locked separately by an assigned pressure control unit. Reliable and economical operation of the system is achieved by positioning a pressure limiter between at least one of the pressure control units and the pressure regulator output and by the fact that in the zero-current state, the pressure limiter acts on a supply hole for the control unit so as to limit the output pressure to a defined value.

Abstract: The invention relates to a wear adjusting device for a motor vehicle disk brake and a method for controlling the device. A brake actuated rotating lever primarily effects a slidable element which actuates at least one adjusting spindle. The spindle presses a brake lining in the direction of a brake disk. According to the invention, the adjustment device consists of an electric drive which adjusts at least one of the adjusting spindles through rotary operation.

Abstract: A compressed-air disk brake for vehicles comprises an actuating device for applying brake blocks in the direction of a brake disk and a brake cylinder, which, on arrival of the compressed air, initiates a braking action via the actuating device. At least one control module, comprising individual pneumatic and electronic components, is incorporated into the brake and/or the associated brake cylinder. For example, the control module may be formed directly on the brake cylinder housing section which encloses the ventilation chamber.

Abstract: A brake disk has a thickness D1 and includes two friction plates disposed parallel to each other, between which an airflow duct having a width D2 is located in a substantially central position. The brake disk is made of a gray cast iron material containing molybdenum. The ratio of the disk thickness D1 to the airflow duct width D2 is 3.0.ltoreq.D1/D2.ltoreq.5. The brake disk has a great resistance to temperature change and a long operating life.

Abstract: In a connecting rod with a split big-end, the unmachined part is preferably aluminum die-casting in which notches are made along the subsequent line of separation. The big-end is separated substantially along the intended break line by means of a shearing tool capable of widening the eye in the region of intended bore reliefs in such a way that subsequent opening out is unnecessary.

Abstract: A breaking device for fracturing an unbroken brake disk in its mounted state. The breaking device has breaking or cutting irons which can be set on the brake disk.

Abstract: An air compressor, from whose outlet a supply line leads to an air drier for the purpose of supplying the compressed air system. On the outlet side of the air drier, the supply line branches into a plurality of line branches that lead to at least two consumer circuits. The pressure in the consumer circuits can be monitored by pressure sensors. Furthermore, control electronics are provided which are connected to the pressure sensors. The consumer circuits can be disconnected from the compressed air supply by a closing member that is disposed in the respective supply line branch and can be switched by the programmable control electronics. By means of this, the supply of compressed air into the consumer circuits and the withdrawal of compressed air for transfer from one circuit into the others can be controlled by the control electronics. The compressed air supply device can be used in the vehicle compressed air systems of commercial vehicles.

Abstract: The energy supply device has a compressor for supplying at least one compressed air consumer. On the outlet end, the compressor communicates with a pneumatically controllable outlet valve. Furthermore, two pressure regulating valves are provided, with which control air can be conveyed to the outlet valve in order to switch the outlet valve into the outlet position. The first pressure regulating valve can be switched by control electronics in accordance with a pressure sensor that detects the pressure on the consumer end. The second pressure regulating valve can be switched directly by the pressure on the consumer end. The second pressure regulating valve switches at a greater pressure on the consumer end than the first pressure regulating valve. In the event of a failure of the control electronics or of the first pressure regulating valve, the second pressure regulating valve takes its place.

Abstract: A vehicle body level control system which includes three variants for optimization of a level control system during loading and unloading operations. These three variants can be employed independently of one another or in any combination. In a first variant of the invention, the control delay time is extended during loading and unloading operations. In a second variant of the invention, the control dead band is extended during loading and unloading operations. A third variant of the invention consists in performing, in the adjustable state of operation, the control to the presettable level only when the vehicle body level does not vary or varies only very little.

Abstract: A brake control arrangement for a composite vehicle including a tractor and at least one trailer possessing an electronic brake control and a mechanical brake control, each producing a fluid pressure supplied to the brakes of the trailer based on brake demand for braking of the vehicle. A trailer control valve in the tractor receives the two pressurized fluids and selects the greater of the two fluid pressures, routing the fluid having the greater pressure to the trailer brake. A stop valve is connected between the mechanical brake control and the trailer control valve and is controlled by a monitoring device of the electronic brake control such that, during a normal mode of operation of the electronic brake control, the stop valve prevents the flow of fluid from the mechanical brake control to the trailer control valve and during an error mode the stop valve permits the flow of fluid from the mechanical brake control to the trailer control valve.

Abstract: A process for producing a brake disc (1) for a disc brake is disclosed; in said process two separating regions (3.sub.1, 3.sub.2) are provided in a one-piece, circular brake disc (1). Said separating regions divide the brake disc (1) into two parts (1a, 1b), whereupon a fastening device (2.sub.1, 2.sub.2), which encompasses the separating region, is designed in each separating region (3.sub.1, 3.sub.2); and finally the brake disc (1) is broken apart into two parts (1a, 1b) in the separating regions (3.sub.1, 3.sub.2). Thus, a brake disc that is easier to mount and to exchange is provided.

Abstract: A braking system for controlling the braking of a trailer as a function of the load condition of the trailer, determined by variables measured only on the tractor. In the tractor, a proportional valve is provided which is controlled by an electronic brake control system and, as a function of the determined load condition, provides the brake pressure for the trailer. The connection of a driver brake valve to a trailer brake valve with a select-high function is controlled by at least one fail-safe valve, which is controlled by the electronic brake control system. In normal operation of the electronic brake system, the output of the proportional valve is the output of the trailer brake valve and in faulty operation of the electronic brake system, the output of the driver control valve is the output of the trailer brake valve.

Abstract: In an application arrangement for a disc brake including a brake lining compartment having two lateral guide surfaces extending in the application direction for guiding and supporting a brake lining which can be displaced by the application arrangement, a plate is situated on the assigned wall surface of the brake lining compartment or on the lateral edge of the brake lining and is disposed so that it can be rollably or slidably displaced with respect to the wall surface along a predetermined path.

Abstract: A drying cartridge for air drying systems, especially for compressed-air brake systems of vehicles, has an inner pot and an outer pot. The components used for the air drying, including a pressure spring used for compressing the drying agent, are arranged inside the inner pot constructed as a preassembled unit, in which case the inner pot can be inserted flush into the outer pot. By usage of an interior-cylindrical wall, the inner pot surrounds a duct which penetrates the drying cartridge in the axial center, through which duct a screw is guided for fastening the drying cartridge on the dryer casing.