Wabco Gmbh

Wabco Europe Bvba

Otmar Struwe

Karsten Breuer

Hartmut Rosendahl

Bernd-Joachim Kiel

Uwe Bensch

Jörg Helmer

Wolfgang Strache

Henning Förster

Andreas Goers

Matthias Tiedtke

Gerd Roters

Guy Alain Djeutchouang Djiya

Andreas Teichmann

Robert Otremba

Bernd Kiel

Wilfried Menze

Hans-Klaus Wolff

Immanuel Henken

Marco Michel

Christoph Brockmann

Olaf Jantz

Matthias Grimm

Andreas Schäl

Jann Loll

Marcel Schlottmann

Marc Gerecke

Dirk Pfeiffer

A bistable solenoid valve device for a fluid system includes a bistable solenoid valve and a detection device. The bistable solenoid valve has a permanent magnet yoke, an armature configured to be displaced between a first armature position for contact against a first core to form an air gap with a second core and a second armature position for contact against the second core to form an air gap with the first core. The bistable solenoid valve device further includes a detection device configured to evaluate and/or measure a first inductance of the first armature coil, and evaluate and/or measure a second inductance of the second armature coil without displacement of the armature, to compare the inductance of the first armature coil and the inductance of the second armature coil, and to output a state signal that indicates the armature position.

Bistable solenoid valve device and method for determining an armature position of a bistable solenoid valve

To effect redundant signal processing of a safety-relevant application, such as for a safety control unit of a motor vehicle, at least two redundant signals are fed from at least one sensor to an electronic circuit assembly as input signals for processing. At least one input signal is converted into a different test signal. In the electronic circuit assembly, the input signals are fed to a first peripheral module of a microcontroller, and the test signal is fed to an additional peripheral module. The sensor information of the input signals and of the test signal are thus redundantly processed independently of each other in a respective peripheral module of the microcontroller.

Redundant signal processing of a safety-relevant application

A valve device for a pneumatically-operated vehicle brake system can adjust the pneumatic brake pressure that can be fed to a brake in a controlled manner. A first variant of the valve device is configured as a modulator for use in an electronically regulated embodiment of the brake system; and a second variant is configured for use in a pneumatically controlled embodiment of the brake system. However, both variants have pneumatic interfaces and mechanical fastening points that are configured substantially identically with respect to one another to facilitate conversion of the brake system from one such embodiment to another.

Valve device for a pneumatically operated brake system

A valve device for brake control of a different pressure medium-operated vehicle brake systems comprises a housing that has pressure medium ducts. A relay valve provides a pneumatic control pressure, which is fed to the relay valve via at least one of the pressure medium ducts at a higher flow rate. At least one insert is pneumatically connected to at least two of the pressure medium ducts, which can be pneumatically connected to each other by the insert. The two pressure medium ducts define a pressure medium path, the profile of which differs based on the housing that is in each case selected and/or switched based on the selected insert. The housing is selected from a set of housings having different pressure medium ducts, in particular bores, but which are otherwise essentially similar. The insert is selected from a set of different inserts.

Valve device adaptable for brake control of a variety of pressure medium-operated vehicle brake systems

A control unit of a vehicle brake system has a receive circuit for tapping and processing a digital signal provided by an active speed sensor for speed measurement on a vehicle wheel. The signal includes information concerning the speed of a pole wheel, which is arranged in front of the sensor, spaced therefrom by an air gap, and which rotates along with the wheel. The signal also includes an actual air gap value digitized in stages and comprising several bits. The control unit also has a comparator circuit for comparing the actual air gap value to a reference air gap value and for determining whether the actual air gap value exceeds the reference value by more than a defined tolerance value. An information circuit of the control circuit generates early warning information when the comparator circuit determines that the actual air gap value exceeds the reference value by more than the tolerance value.

Brake system control unit and speed sensor arrangement

An actuating device includes a vehicle operating brake and parking brake. A first braking effect is generated by the parking brake independently of a braking procedure for the operating brake. The actuating device comprises a first switched state, wherein the first braking effect of the parking brake cannot be provided, and a second switched state, wherein the first (full) braking effect of the parking brake is provided. The actuating device further comprises a manually actuatable operating element for actuating the parking brake that comprises travel positions. The actuating device is switched to the second switched state in a first travel position when the parking brake is released, and to the first switched state when the parking brake is applied. Also, the actuating device is switchable to a further switched state. In an actuating method, the actuating device is switched to the further switched state in response to an actuation.

Actuating device and method for a vehicle parking brake

An electro-pneumatic brake control device is provided for controlling the parking brake of a vehicle having compressed-air-actuated brake cylinders, at least one of which is a spring brake cylinder with a spring store part. Valve devices place the brake control device into various operating states. In a first operating state, the valve devices are at least partially supplied with current and switched such that a compressed air line to the spring store part of the spring brake cylinder is aerated. In a second state, the valve devices are at least partially supplied with current and switched such that the compressed air line is deaerated. In a third state, which can be activated in the event of failure of the electrical energy supply of the brake control device, the valve devices are switched to a currentless state such that the compressed air line is automatically deaerated in throttled manner.

Electro-pneumatic brake control device

A parking brake of a brake system for a vehicle includes an anti-lock device, which, based on a signal that is dependent on the rotational speed of the vehicle engine, transmission, or drive shaft, prevents blocking or excess slippage of a wheel that can be decelerated by the parking brake.

Vehicle parking brake and operating method

A valve unit for an electro-pneumatic brake control device for controlling a parking brake of a vehicle includes at least one air-quantity-boosting valve device for aerating and venting at least one spring brake cylinder of the parking brake and at least one electrically actuatable control valve for controlling the air-quantity-boosting valve device. To simplify the construction of the brake control device, the air-quantity-boosting valve device and the control valve are integrated in a common integral valve block.

Valve unit for an electro-pneumatic brake control device

An electrically controlled brake system for a tractor is provided that is equipped with an anti-jackknifing brake that can be actuated by means of a manual operating element and that acts only on the brakes of a trailer coupled to the tractor. The operating element is an electrical element which generates an electrical signal to control a valve device by means of which the braking force of the anti-jackknifing brake can be increased.

Electrically controlled brake system

A brake system for a vehicle includes a parking brake with an air-quantity-boosting-valve device for aerating and deaerating at least one spring brake cylinder of the parking brake, at least one electrically actuatable control valve for controlling the air-quantity-boosting-valve device, an electrical control device electrically coupled to the electrically actuatable control valve for controlling the electrically actuatable control valve, and an electrical actuating device coupled to the control device for actuating the parking brake. In order to be able to resort to available series-produced components, the air-quantity-boosting-valve device, the control valve, the electrical control device and the actuating device are, in each case, embodied as autonomous components arranged spatially separate from one another.

Brake system for a vehicle

An electrically controlled brake systemfor a tractor is provided that is equipped with an anti-jackknifing brake that can be actuated by means of a manual operating element and that acts only on the brakes of a trailer coupled to the tractor. The operating element is an electrical element which generates an electrical signal to control a valve device by means of which the braking force of the anti-jackknifing brake can be increased.

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Hannover, Germany

Otmar Struwe