Abstract: The braking effect in a vehicle is set in the sense of preventing a tendency to lock-up with at least two wheels which are arranged on at least one axle on the right and left and whose motion characteristics are detected. The braking effect on the two wheels is set jointly, with at least two operating modes (select low, select high) being provided; they can be selected depending on the coefficients of friction prevailing on the wheels and/or depending on the vehicle speed. An operating mode is selected according to the value of the prevailing coefficients of friction when there are coefficient of friction differences of a preselectable lower value. As an alternative or in addition, an operating mode is selected according to the detected vehicle speed when there are coefficient of friction differences of a preselectable greater value.

Abstract: An epitaxial growth chamber with a quartz dome that can withstand low pressure forces and also allows laminar flow in atmospheric pressure processes.

Abstract: A method and device for controlling a braking system of a motor vehicle in open loop, in which the wheel-brake pressure in the individual wheel brakes is adjusted via closed pressure-control loops. Different secondary braking operations are initiated depending on the fault condition. The faults are detected on the basis of a model which takes into account the prevailing operating state of the braking system.

Abstract: The invention relates to a fuel-injection system for an internal combustion engine. The fuel-injection system contains a number of fuel injectors which are supplied with fuel by a high-pressure pump via a common inlet pipe and high-pressure lines leading from said pump to the individual fuel injectors. High-pressure storage devices are provided in each of the high-pressure lines in each of the high-pressure lines, the fuel storage volumes of said high-pressure storage devices being between 80 and 300 times, preferably between 120 and 200 times the maximum injection quantity per injection action. The diameter D2 of the high-pressure lines leading from the common inlet pipe to the high-pressure storage devices is measured to minimize the difference in the quantities of fuel injected by the fuel injectors.

Abstract: A method and a device for check-testing a braking system in which, before travel commences, a self-test of the braking system is performed. During the course of the self-test, the valve arrangements allocated to the wheel brakes and the pressure supply providing the brake pressure are driven in a predefined manner. A plurality of test phases are provided, after whose respective conclusions, a pressure level to be expected should be reached. Otherwise a secondary braking operation is initiated at least for the subsequent operating cycle of the vehicle.

Abstract: A wall construction for a combustion chamber or thrust nozzle of a high power engine of a flying body includes an inner wall body that is subjected to the hot gases within the combustion chamber, and an outer jacket that surrounds the inner wall body and carries the mechanical loads. The inner wall body has a plurality of cooling channels through which a cooling medium may flow. The outer jacket is made of a long-fiber C/SiC composite material, while the inner wall member is made of a short fiber C/SiC composite material. The reduced thermal expansion coefficient of this ceramic composite material in comparison to metal alloys leads to a reduced straining and reduced deformation of the wall construction and therewith an increased operating life.

Abstract: The invention relates to a hydraulic brake system of a vehicle comprising one wheel brake valve preceding each wheel brake cylinder and one return feed pump connected parallel to each of the wheel brake valves and connected to the suction sides of the wheel brake cylinders. For anti-lock control, the return feed pump is put into operation, and by clocked triggering of a wheel brake valve of a vehicle wheel that is tending to lock, the brake fluid pressure in the wheel brake cylinder of this vehicle wheel is modulated. To realize a traction control device, the invention sets forth a switchover valve in a brake line from the master brake cylinder to the wheel brake cylinder of a driven vehicle wheel.

Abstract: The invention relates to a vehicle hydraulic brake system having a traction control unit and a dynamic driving control unit. To enable building up pressure quickly with a return feed pump, even when the master cylinder is not actuated, a precharge pump, which is mounted on the storage container of the master cylinder and can be made to communicate with the master cylinder through a valve that is mounted in the storage container following the master cylinder. When the master cylinder is not actuated, pressure can be built up in the master cylinder and thus in the vehicle brake system using the precharge pump.

Abstract: An external energy source of a hydraulic motor vehicle power brake system, which has first and second valves that can be electrically controlled to adjust wheel brake pressures for wheel brakes, must be protected from being overloaded. To avoid the necessity for a safety valve, which has been used up to this point for protecting the external energy source, it is proposed that the first valve be embodied as a seat valve having a valve seat connected to the external energy source by means of an inlet opening disposed upstream, having a valve closing body associated with the valve seat, and having a closing spring that presses the valve closing body against the valve seat, which spring is dimensioned as a safety valve spring in a fashion according to the invention. In a reasonably priced manner, the first valve is used as a safety valve that protects the external energy source and on the other hand, for braking procedures, is used as a valve for adjusting wheel brake pressures.

Abstract: The invention relates to a method and an apparatus for the production of a plate with depressions or apertures which is coated on at least one side. Plates of this kind are employed, for example, as passage-containing plates in hydraulic blocks for ABS/ASR/VDC systems, the depressions or apertures serving as passages or holes and the coating being a seal. In this invention the depressions or apertures are formed in an uncoated plate and then the plate is coated. As a result, the life of the machining tools is extended, the machining tolerances become smaller and the rate of machining can be increased.

Abstract: A vehicle hydraulic brake system having brake pressure modulation valve assemblies, between a dual-circuit master cylinder and wheel brakes of vehicle wheels. The pump device is embodied as a low-pressure pump with the brake pressure modulation valve assemblies be assigned a first and second return pump and that in the automatic braking mode the first pressure chamber is made to communicate with a first return pump and the second pressure chamber is made to communicate with the second return pump, on the inlet side in both cases. The low-pressure pump, in the automatic braking mode, generates charge pressure for the return pumps that is substantially below a maximum brake pressure, and the return pumps generate the maximum projected brake pressure and serve, in the additionally possible anti-lock mode, to return pressure fluid from the wheel brakes to the master cylinder.

Abstract: During ASR control of spinning drive wheels, the pressure level in the wheel brake with the highest pressure level is modulated by driving a switching valve USV which affects the pressure in all the wheel brakes of the brake circuit, whereas the pressure level in the other wheel brake or brakes is controlled by way of wheel-specific inlet and outlet valves. The intake control valve ASV is kept open through the entire ASR control period. As a result, the electrically actuated ASV can be replaced by a hydraulically actuated ASV.

Abstract: A carrier palette useful for receiving at least one of a plurality of disc-shaped substrates of optical storage media, wherein the carrier palette comprises one or a plurality of circular depression adapted to receive said substrates, and wherein the diameter of the depressions is greater than the diameter of the substrates to be received. The carrier palette can be used to produce optical storage media of improved climatic stability with minimal edge splintering.

Abstract: A device and a method for controlling an ABS antilock braking/ASR traction control system include a return pump, at least one aspirator valve (ASV), and at least one switch-over valve (USV). The return pump, the switch-over valve and/or the aspirator valve are triggered at least in dependence upon one signal which represents the actuation of the brake pedal.

Abstract: The invention relates to a method and an apparatus for the production of a plate with depressions or apertures which is coated on at least one side. Plates of this kind are employed, for example, as passage-containing plates in hydraulic blocks for ABS/ASR/VDC systems, the depressions or apertures serving as passages or holes and the coating being a seal. In this invention the depressions or apertures are formed in an uncoated plate and then the plate is coated. As a result, the life of the machining tools is extended, the machining tolerances become smaller and the rate of machining can be increased.

Abstract: An arrangement limits a fuel supply from a fuel pressure reservoir by way of a controllable injection valve into the combustion space of an internal-combustion engine. The fuel flow is interrupted as a function of the forces applied to a spring-prestressed valve separating piston in the event of an outlet-side pressure drop. A reliable limiting of the maximal injected fuel quantity is achieved by providing a flow-through opening penetrating the separating piston with a closing device. This flow-through opening can be closed as a function of the displacing direction of the separating piston. If the displacing device closes the flow-through opening in the starting position, during the injection phase and in the piston end position, the limiting valve will continuously interrupt the fuel flow in the case of an outlet-side pressure drop.

Abstract: A travel simulator having a progressive pedal characteristic to be in operation in a power-actuated service brake. The hydraulic brake system has a valve assembly for the switching of the brake system into operation as either a service brake or as an emergency brake. The master cylinder has a pressure fluid reservoir, two pressure chambers, and an intermediate piston as well. The intermediate piston is supported on a travel simulator spring. When the service brake is in operation, pressure fluid can be diverted from the second pressure chamber into the reservoir, and the intermediate piston is moved against the resistance of the spring. When the emergency brake is in operation, both pressure chambers communicate with one another so that the intermediate piston is pressure balanced. When the pedal is actuated, pressure fluid is expelled from the first pressure chamber. The intermediate piston is not subject to any motion during an emergency brake operation. The brake system is for use in road vehicles.

Abstract: A magnetooptic layer made from rare-earth metals and transition metals exhibits a gradient in the alloy composition over the layer depth, and has a coercive field strength of more than 8 kOe in the temperature range of .DELTA.T=100.degree. C. around the compensation temperature T.sub.comp. The layer is fabricated with a dynamic sputter process, in which the substrates to be coated are led past one or a plurality of sputter targets, arranged in a common plane parallel to the track of the substrates. A mask is located between the sputter targets and the substrates.

Abstract: A simplified and improved hydraulic brake system has at least one valve arrangement for the brake pressure modulation in a wheel brake. Furthermore, a high-pressure pump is provided to return pressure medium from the wheel brake into a main brake cylinder in the case of an anti-lock control operation or to deliver pressure medium from the main brake cylinder into a wheel brake during drive-slip control operation. A shut-off valve with a spring-actuated through-flow position and a shut-off position, which can be selected by the pressure at the main brake cylinder end, is arranged upstream on the suction side of the high-pressure pump. The hydraulic brake system with anti-lock and drive-slip control device is used in motor vehicles.

Abstract: A dual-circuit braking system for motor vehicles with an anti-locking device and optionally traction control, which is equipped with at least one pressure reducer for the brake pressure in the front-axle brake cylinders. With normal braking this pressure reducer is activated and the brake pressure on the front wheels is reduced. In the case of anti-locking, the pressure reducer is deactivated. However, with a defect in the electrical system or the anti-locking device, the pressure reducer is de-activated, and braking occurs at the front and rear such that vehicle deceleration of 0.82 G blocks the front wheels before the rear wheels.