Robert Boschgmbh

Herbert Keller

Erich Zabler

Helmut Pueschel

Manfred Abendroth

Joerg Wolf

Werner Wilde

Ortwin Engfer

Georg Pfaff

Joachim Gillert

Described is a braking-pressure control system, especially for a road vehicle, having a pneumatic brake booster ( ), having a main cylinder ( ) in which a main-cylinder pressure (P ) can be generated by a pneumatic brake booster ( ), and having a hydraulic modulator ( ) which is connected between the main cylinder ( ) and at least one wheel-brake cylinder ( ) of at least one wheel; the hydraulic modulator ( ) including a configuration of switchable valves (ASV, USV, EV, AV), as well as one pump ( ); and a wheel-brake cylinder pressure (P ) being able to be generated in the at least one wheel-brake cylinder ( ), using the hydraulic modulator; the wheel-brake cylinder pressure being higher than the main-cylinder. pressure (P ). The braking-pressure control system is characterized in that the pneumatic brake booster ( ) is designed in a manner allowing it to already reach its saturation point (A , A ) at a main-cylinder pressure (P ) of less than 50 bar.

Brake pressure control device, especially for a road vehicle

A brake system for vehicles, in particular for motor vehicles, has electrically controlled hydraulic final control elements, integrated in a hydraulic block; a pressure sensor with a plurality of pressure measuring elements for measuring the hydraulic pressure controlled by the individual final control elements; and a control circuit for controlling the final control elements. For the sake of simple and secure mounting of the hydraulic block, pressure sensor and control circuit, the control circuit and pressure sensor are accommodated in a common housing of an add-on electronic control unit (ECU), from whose underside the pressure measuring elements protrude with smaller-diameter plug-in tubes. When the add-on ECU and hydraulic block are installed, and that the housing is mounted on the hydraulic block and solidly joined to it by insertion of the plug-in tubes into the fluid conduits, present in the hydraulic block, in a fluid-tight manner.

Brake system for vehicles

A sensor is proposed that has a measuring diaphragm (,), with at least one resistor measurement bridge (,); a deflection of the measuring diaphragm (,) causes mistuning of the respective measurement bridge (,), and the resultant change in the bridge diagonal voltage can be evaluated. The sensor (,) has one resistor measurement bridge (,) on each half (,) of the measuring diaphragm (,), and in each of the resistor measurement bridges (,), two opposed bridge branches (R,R,) are changed in their resistance values (&Dgr;R) by radial compressive offset, and the respectively other bridge branches (R,R,) are altered in their resistances by radial or tangential elongation.

Testable membrane sensor with two full bridges

Method and circuit for monitoring the functioning of a sensor bridge

A tilt-actuated switch features a housing 11 and a contact element 14 movable within the housing between a stable first position and a second position in which the contact element electrically connects two fixed contact elements secured to the housing. The movable contact element responds to tilting of said housing beyond a predetermined critical angle, with respect to the vertical, by flipping from the stable first position through an unstable position (FIG. 2) into a second position (FIG. 3) which is stable. Unlike prior art tilt-actuated switches, this improved switch applies sufficient force against the fixed contacts, even when the tilting is gradual, to assure reliable electrical contact, necessary for applications such as a 'dead-man-switch' in a portable radio transceiver.

Growing community of inventors

Wiernsheim, Germany

Herbert Keller