Abstract: A method and a device for electronically controlling or adjusting a brake system of a vehicle is proposed, in which brake system the characteristic braking curve of the trailer is adapted to a prescribed characteristic braking curve of the towing vehicle, in order to minimize the longitudinal forces between a towing vehicle and a trailer during a braking process, in such a way that the braking of the entire road train takes place in accordance with the prescribed characteristic braking curve of the towing vehicle.

Abstract: Braking system determines a brake actuation rate .DELTA.U/.DELTA.t, where U is a function of pedal position S, and compares the rate to a limiting value G. When G is not exceeded, the auxiliary brake is actuated first and the friction brake is actuated with a small slope. When G is exceeded, the friction brake is actuated sooner and with a greater slope, and the auxiliary brake may not be actuated at all.

Abstract: A method and apparatus for calculating the axle load on a motor vehicle having at least one axle, wherein the axle is coupled to the vehicle body, or the like, by a spring assembly. The frequency of the vibrations of the vehicle body opposite the axle that occur when driving are measured. The frequency measurements are in turn used to calculate a first axle load. A second axle load is calculated based on the displacement of the vehicle body relative to the axle due to the axle load. The first and second axle loads are evaluated to calculate a final axle load.

Abstract: A multiple-circuit brake system for motor vehicles in which a multiple-circuit braking value transducer is embodied partially electrically and partially as a pneumatic control valve and is intended for triggering pressure control valves, the wheel brake cylinders being disposed following these pressure control valves. One pressure-medium reservoir is associated with each pressure control valve, and the controlling energy for each of these pressure control valves is drawn from the pressure-medium reservoir associated with that valve. In the pneumatic brake circuit (I), a further pressure-medium reservoir is provided preceding the braking value transducer, as a result of which it is possible, with the aid of two-way check valves, to actuate the wheel brake cylinders with the pneumatic brake circuit (I) whenever the electrical brake circuits (II, III) have failed.

Abstract: A brake pedal of a braking system controls braking pressure to be applied to both the front as well as the rear axles of a vehicle, typically a truck or other heavy vehicle.

Abstract: A dual-circuit pressure medium brake system is equipped with relay valves disposed ahead of the brake cylinders. Each brake circuit is equipped with a control also acting in the other circuit and overlapping each other, and a primary brake circuit is designed in such a way that it contains all control elements necessary for optimal brake pressure adaptation, while a secondary brake circuit is merely an auxiliary brake circuit without control elements. In this manner each brake pressure metering can be simultaneously adjusted. During the loss of the primary brake circuit, the secondary brake circuit guarantees a minimal brake pressure. Such a pressure medium brake system is preferably used in air brake systems of motor vehicles.

Abstract: A tractor-trailer braking system with a control valve for the trailer which is controllable by at least two service brake circuits of the tractor. One circuit of this multi-circuit control has an electrical control in the form of magnetic valves, or the like, in order to speed up the control process. The system may be combined with a load-dependent switching element and/or with an anti-skid protection-dependent switching element.

Abstract: A brake force regulating system for motor vehicles has a brake pedal, a brake regulator and transducers for ascertaining driving-situation variables which act upon the brake regulator. A desired value (Z.sub.s) of the deceleration (Z) of the motor vehicle is prespecified by the brake pedal; the actual value is ascertained; and the brake regulator is regulated by the deviation between the desired value and the actual value. Furthermore a regulation is provided in accordance with the slip between the road surface and the wheel.

Abstract: A pressure-medium brake system, which comprises multiple circuits and has associated with each brake cylinder or group of brake cylinders relay valves which are controllable by a control medium. Depending on the number of brake circuits and the kind of the respective control medium, the relay valves are provided with several, possibly different, control chambers. This results in an overlapping control which insures that each relay valve can even be controlled in the event that a control circuit has been lost. The brake system is preferably used in utility vehicles equipped with air brakes.

Abstract: A load-dependent brake force governor is proposed, in which the actuation linkage which influences the governor valve is additionally used for the purpose of actuating a signal transducer which then produces a load-dependent signal. The signal transducer can be either a control valve (FIG. 1) or an inductive transducer (FIG. 2). In this manner, even when the brake is not actuated, a load-dependent signal is available for use, with which further devices, such as an engine brake or a retarder, an axle load indicator or a headlight range control means, can be actuated. A supplementary pickup of the movement of the vehicle chassis can be omitted. The brake force governor is preferably applicable to motor vehicles.

Abstract: A brake system for combinations of vehicles in which a truck tractor and/or trailer (semi-trailer) is or are equipped with a supplementary electrical brake system. By the particular embodiment of the brake system, it is possible to couple a truck tractor, with or without an electrical brake system, to a trailer, with or without an electrical brake system, without infringing safety regulations.

Abstract: A multi-circuit pressure medium brake system in which a pressure control valve is used which can be triggered in a multi-circuit manner. One of the controls is effected electrically and generally advances ahead of a pressure-medium control, so that when the system is functioning properly, the pressure-medium control remains without effect. Various modifications for the pressure control valve have been set forth and a plurality of combinations of switching members for meeting various pressure regulating conditions have been set forth. The multi-circuit pressure medium brake system is preferably applicable to motor vehicles.

Abstract: A brake system for vehicles with trailers and having a compressed-air, dual-line brake system, in which a pressure sensor is associated with the trailer brake valve, with which sensor an electronic switching system disposed on the trailer can be triggered. A following pressure control valve is either switched parallel to a brake line leading from the trailer brake valve to the brake cylinders or, given dual-circuit triggering, of itself takes on the function of supplying the brake cylinders.

Abstract: An electro-pneumatic brake system with a pressure control valve switched ahead of the brake cylinders is proposed, which connects the brake cylinders either with outside air or with a storage tank. The pressure control valve is directly operable by an electro-magnet or, in the case of its loss, by an operating piston and is formed as a double-seat valve with large flow-through diameters. It can be combined with stop valves in order to make possible a multichannel pressure control. The compressed brake system is intended for use in motor vehicles, especially in utility vehicles.

Abstract: A pressure medium brake system for motor vehicles is proposed in which a high-pressure-producing apparatus and a normal-pressure brake apparatus are provided. The brake pressure is reduced with the aid of pressure limiters from high pressure to normal pressure. In order to attain rapid filling of the brake cylinders, one relay valve is disposed before each group of brake cylinders, the relay valves being triggered with normal pressure and very rapidly directing the high pressure into the brake cylinders with a large pressure drop. Upon attaining the maximum pressure level of the normal pressure, the supply of high pressure in the relay valve is cut off. The pressure medium brake system is preferably used as a compressed-air brake system for trucks and trailer-trucks.

Abstract: An anti-skid brake system for vehicles is proposed in which various transducers for detecting operating condition parameters of the vehicle are provided, which cooperate with an evaluation circuit in such a manner that control signals are formed on the basis of the transducer signals for influencing the brake pressure at predetermined operating conditions. Circuitry are additionally provided which store the operating condition parameters, such as vehicle speed and deceleration, braking path and the like, during the braking event under the predetermined operating conditions; and to control marking of the road surface during these braking events.

Abstract: A tire-pressure regulating system for motor vehicles is proposed, in which a tire-pressure control valve is provided on each vehicle wheel to be monitored.The control valve has a valve seat attached to the housing and a closing body arranged to cooperate with this valve seat. The closing body is disposed on a working surface in such a way that a seat valve controlled by working surfaces is created. The control valve is adjustable in accordance with differential pressure with the aid of a throttle valve means. In this way the differential pressure can be established by the tire pressure being directed at that time. Below a minimum permissible filling pressure, the control valve is closed.The tire-pressure regulating system is preferably applicable to trucks and trailer trucks such as semitrailers to which frequently is attached another wheeled cargo carrier.

Abstract: A pressure-medium brake system with division into two or more brake circuits is proposed. A relay valve is incorporated into each brake circuit. Control medium and working medium of each relay valve are supplied by the same pressure-medium source. For each brake circuit a single valve is provided in a service brake valve, which additionally has an electrical supply, with which the actuation of all relay valves can be controlled. The pressure-medium brake system is perferably embodied as an air-brake system and is intended for utility vehicles, such as trucks and buses.

Abstract: A tire-pressure regulating system is proposed with which the air pressure in the vehicle tires can be varied while driving. The tires are connected to supply lines in which rotor connections, control valves, flow restrictive elements and an adjustable regulating valve are disposed. A relay valve and an axle valve are incorporated following the regulating valve.By means of guiding the supply line in and at the axle valve in a particular manner, an acceleration of the pressure equalization process is attained.The tire-pressure regulating device is preferably usable in trucks and trailer trucks.

Abstract: A load-dependent brake force controller including a lever mechanism with a variable fulcrum and a control mechanism which is arranged to bring the brake force controller into a middle position upon failure of the connecting linkage which includes a two-part shaft, one driving shaft part fixedly attached to a lever moved by the vehicle axle and indirectly coupled via an excursion limiter embodied as a torque coupling to a sled for varying the support point of the fulcrum with the other shaft fixedly coupled to the sled, wherein the control mechanism is disposed in the vicinity of the confronting ends of the two-part shaft and usually exerts a largely ineffective torque on the driving shaft part but, upon a fracture or failure of the driving linkage, acts on the second shaft part with a torque that is greater than the torque exerted by the excursion limiter.