Wabco Gmbh

Andreas Schäl

Hartmut Rosendahl

Heinrich Diekmeyer

Bernd-Joachim Kiel

Uwe Bensch

Otmar Struwe

Wolfgang Strache

Jörg Helmer

Henning Förster

Joachim Reinhardt

Christoph Wilken

Wilfried Menze

Olaf Jantz

Matthias Grimm

Frank Van Son

For a motor vehicle, a compressed air preparation device includes a pressure line configured to conduct compressed air, a drying device disposed in the pressure line, a governor valve coupled to the drying device, and an electrically actuatable solenoid valve, the governor valve being (i) pilot controllable by the solenoid valve at a high pressure level to allow the compressed air to be fed through the pressure line when the solenoid valve is actuated and (ii) configured to control regeneration of the drying device in response to a low pressure level from the solenoid valve when an electrical supply to the solenoid valve fails.

Compressed air preparation device

A vehicle compressed air supply system includes a supply part with compressor, an air drying part and a consumer part including consumer circuits with brake circuits supplied with compressed air via a multi-circuit safety valve. The brake circuits, and optionally at least one other consumer circuit, include compressed air tanks. Pressure in the circuits is monitored by sensors and evaluated by an electronic control device. To determine system parameters in terms of tank size and compressor output, when filling circuits, the rate of pressure increase in a circuit is determined as a function of compressor speed, and air-drying regeneration is effected. The period of a pre-defined pressure drop or pre-defined pressure gradient is determined and air volume for completing regeneration is calculated from the magnitude of the pressure drop, regeneration time and throttle diameter. Tank volume is determined therefrom. Compressor output is calculated from tank volume and rate of pressure increase.

Compressed air supply system and method for determining system parameters

A parking brake module for a pressure medium-operated brake system of a vehicle having a parking brake function enabled by at least one spring brake cylinder includes a first valve device that increases the amount of pressure medium and has an inlet that can be connected to a pressure medium reservoir, an outlet that can be connected to at least one spring-loaded part of a spring brake cylinder, and a control input connected to a control line. A second valve device encompasses at least one first connection used as a trailer control valve connection and can be connected to a trailer control valve to control a trailer brake. To provide a valve concept for different vehicle configurations, particularly including an anti jackknifing function, pressure prevailing at the first connection can be adjusted regardless of pressure prevailing in the pressure medium reservoir and at the outlet of the first valve device.

Parking brake module for a pressure medium-operated brake system

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Nordstemmen, Germany

Andreas Schäl