Abstract: A method of filling a pressure medium accumulator with a housing having an inner space that is subdivided into two chambers by a metallic pleated bellows used as a media-separating element. The first chamber thereof is filled with a gas and the second chamber is filled with a liquid pressure medium. The bottom valve is provided in a hydraulic port, its closing member being operable by the media-separating element. The valve permits filling of the second chamber with fluid and prevents a complete evacuation of the second chamber. To enable reliable filling of the above-mentioned chambers with corresponding media without damaging the pleated bellows, the method includes the steps of evacuating the second chamber, filling the second chamber with pressure medium and filling the first chamber with a gas.

Abstract: It is known in the art to apply a counterforce, which opposes the actuating force, onto an accelerator pedal of a vehicle in the event that the vehicle, with respect to a vehicle parameter, sufficiently deviates from the nominal value. The parameter can be the speed or the measured distance from vehicles driving ahead.

Abstract: The present invention relates to a vacuum brake booster for motor vehicles, including a booster housing whose interior is subdivided by a movable wall into a vacuum chamber and a working chamber, a control valve that controls the pressure difference acting on the movable wall and is arranged in a control housing that carries the movable wall, said control valve being composed of two concentrically arranged sealing seats and an elastically deformable valve member, as well as including at least one filter in the air passage.

Abstract: The present invention relates to a method of filling a pressure medium accumulator with a housing having an inner space that is subdivided into two chambers by a metallic pleated bellows used as a media-separating element, the first chamber thereof being filled with a gas and the second chamber being filled with a liquid pressure medium, and wherein a bottom valve is provided in a hydraulic port, its closing member being operable by the media-separating element, said valve permitting filling of the second chamber with fluid and preventing a complete evacuation of the second chamber.

Abstract: The present invention discloses a hydraulic fluid accumulator comprising a housing having an interior subdivided into three chambers, with the first chamber being filled with a gas and separated from the second chamber by a first media separation element, the second chamber being filled with a fluid and separated by a second media separation element from the third chamber that is also filled with a fluid and connected to a hydraulic port. To safeguard an effective separation of media within the hydraulic fluid accumulator and, thus, a significant increase in its functional safety, the present invention arranges for the second media separation element to be embodied by a metal piston delimiting a chamber that can be vented in the housing.

Abstract: The present invention discloses a hydraulic fluid accumulator comprising a housing (1) having an interior subdivided into three chambers (2, 3, 4), with the first chamber (2) being filled with a gas and separated from the second chamber (3) by a first media separation element (6), the second chamber being filled with a fluid and separated by a second media separation element (7) from the third chamber (4) that is also filled with a fluid and connected to a hydraulic port (5).

Abstract: In an electronically controllable brake unit for automotive vehicles, including a pressure generating device for generating a hydraulic pressure and a drive unit, a particularly low-noise design that is optimized with respect to the reduction of radial forces on the motor bearing is achieved because the pressure generating device is an internal gear pump (4). Preferably, the internal gear pump (4) is designed as a cartridge and attached in the valve block (1) by way of a clinch-type connection.

Abstract: The present invention discloses a pressure fluid accumulator with a housing having its interior subdivided into two chambers by a media-separating element, the first chamber being filled with a gas and the second chamber being filled with a liquid, and wherein in a hydraulic port a bottom valve is provided whose closure member is operable by the media-separating element and which permits filling the second chamber with liquid and prevents complete evacuation of the second chamber. In order to prevent a damage of the bottom valve and an inadvertent escape of fluid and, thus, ensure a considerable increase in the reliability in operation, according to the present invention, the closure member can be moved by the media-separating element to adopt a position in which it fulfils the function of a hydraulic piston.

Abstract: The present invention relates to a pressure sensor unit, in particular for a pressure control device, comprising a carrier housing for holding several pressure sensors, wherein the carrier housing accepts the pressure sensors as a modular assembly that can be preliminarily tested and forms an independent subassembly preferably arranged between a first and second housing of the pressure control device.

Abstract: An electronically controllable brake actuation system for motor vehicles is proposed, with a master brake cylinder (2), with a pressureless pressure medium reservoir (3), with a pressure source (20) which can be controlled by means of an electronic control unit (32), by means of which pressure can be applied to the wheel brakes (7, 8, 9, 10) of the vehicle, which can be connected by means of at least one hydraulic connection (11, 14), which can be shut off by means of a separating valve (12, 15), to the master brake cylinder (2), with a device (13, 33) for the recognition of the driver's wish to slow down, and with at least one separating piston arrangement (16) which is connected before the wheel brakes (7-10), where the first chamber (17) of this separating piston arrangement can be connected to the master brake cylinder (2), and its second chamber (19) can be connected through a valve device (27) to the pressure source (20) or to the pressure medium reservoir (3).

Abstract: An electronically controllable brake actuation system for automotive vehicles includes a simulator interacting with the master brake cylinder, a pressure source drivable by an electronic control unit and by which wheel brakes of the vehicle are pressurizable, the wheel brakes being connectable to the master brake cylinder by at least one hydraulic connection that is closable by separating valves, a device for the identification of the driver's wish for deceleration, each one inlet and outlet valve connected upstream of the wheel brakes, and wheel sensors sensing the rotational behavior of the vehicle wheels. To improve the meterability of braking pressure of a system of the above type, especially in the range of low pressure values, the pressure source is configured as at least one continuously adjustable piston-and-cylinder assembly having a pressure chamber which is connectable to the master brake cylinder and the wheel brakes.

Abstract: The present invention discloses a magnetic valve for liquid and gaseous working media, in particular for hydraulic brake systems in automotive vehicles, which includes a first cylindrical housing part that is encompassed on its outside by a magnetic coil and has a cylindrical recess inside which extends in an axial direction to accommodate and guide an axmature, a tappet which is displaceable by the armature in an axial direction in opposition to a resetting spring, a second cylindrical housing part which is arranged coaxially to the first housing part and includes a cylindrical recess extending in an axial direction, the said recess being in connection to outside valve ports and in which a valve seat cooperating with the tappet is arranged.

Abstract: The present invention relates to a pressure fluid accumulator which includes a housing with a pressure fluid port and a body which is movably arranged in the housing and isolates at least two chambers in the pressure fluid accumulator from one another. The body is configured as a metal pleated bellows which is movable in the housing and encloses the one chamber.

Abstract: An electronically controllable brake actuating system for automotive vehicles includes a master brake cylinder operable by an actuating pedal and having at least one piston, at least one braking pressure generator actuatable by an electronic control unit, to which braking pressure generator wheel brakes of the vehicle are directly connected and which is connectable to the master brake cylinder by hydraulic connections closable by valve assemblies, at least one sensor device to identify the driver's wish for deceleration, and a simulator chamber which interacts with the master brake cylinder. The reliability of the system may be improved by providing a simulator chamber that is connected to a hydraulic chamber and which is bounded in the master brake cylinder by a second piston, by way of a closable connection.

Abstract: A construction and fabrication process for a two piece vacuum brake power booster housing is described which eliminates the surface tensions which are caused by forming during assembly to prevent damage to a protective surface finish. Localized radially weakened zones are each formed by two opposing tongues created by circumferential and axial slots which tongues in the assembled condition of the housing engage behind an outwardly and reversely formed rim (3) of the other housing half (1).