Wabco Gmbh & Co Ohg

Wabco Gmbh

Hans-Klaus Wolff

Axel Stender

Horst Eckert

Dieter Frank

Armin Sieker

Peter Homann

Hartmut Rosendahl

Norbert Witte

Otmar Struwe

Gerdt Schreibert

Hartmut Schappler

Detlef Schmidt

Gerald Stanusch

Andreas Kranz

Dirk Meier

Ingo Torhoff

Christoph Brockmann

Immanuel Henken

Matthias Grimm

Gerdt Schreiber

Claudia Deike

Marcel Schlottmann

Wilfried Reinefeld

Jürgen Koch

A modulator for a vehicle brake system connected to a central module via a data bus, includes at least one input for capturing measured values and at least one output for controlling at least one electromagnetic valve. A control circuit for actuating the valve is connected by the bus such that the measured values are transmitted to the central module. Control commands for actuating the valve are calculated from the measured values in the central module, and are transmitted via the data bus to the modulator so that the it selects the valve as a function of the commands. A vehicle system has at least two modulators and a central module integrated in a modulator. The modulator can be used as a pressure modulator in an air suspension system or in an electronic braking system or in a conventional braking system with an anti-lock braking system or an electronic stability program.

Modulator

A pre-engagement unit for a braking pressure modulator for a pressure regulating circuit includes a first pneumatic inlet, a second pneumatic inlet, a first pneumatic output terminal, and a second pneumatic output terminal. The unit includes an electrically actuated valve system having a plurality of solenoid valves and a plurality of electrical terminals connected to output terminals of an electronic control unit. An electric braking command signal transmitter delivers a driver initiated electric brake value setting to an input of the electronic control unit. Under normal conditions, a supply pressure and a redundancy pressure are delivered at the first pneumatic output terminal to be converted by an air quantity augmenting relay valve to a braking pressure. In case of failure of the electronic braking system, the redundancy pressure is delivered at the first pneumatic output terminal to be converted by the air quantity augmenting relay valve to the braking pressure.

Braking pressure modulator for an electronic braking system

A pre-engagement unit for a braking pressure modulator for a pressure regulating circuit of an electronic braking system includes an electrically actuated valve system with three substantially identical 2/2-way solenoid valves. First and second terminals of the 2/2-way solenoid valves are selectively connected to the pneumatic inlets and output terminals of the pre-engagement unit, and to each other so that the first 2/2-way valve serves as an air admission valve for supply pressure, the second 2/2-way solenoid valve serves as an air admission/exhaust valve for redundancy pressure, and the third 2/2-way solenoid valve serves as an exhaust valve. Thereby, the pressure in the pressure regulating circuit can be increased, decreased, or maintained. Desirably, the first, second, and third 2/2-way solenoid valves are connected in parallel to each other.

Braking pressure modulator for a trailer with electronic braking system

A valve system for the pre-engagement unit of a vehicle braking pressure modulator contains solenoid valves, which are controlled by an electronic braking system. Pneumatic pressure is fed into a brake cylinder on the vehicle wheels via a pressure regulating channel of the pre-engagement unit. The solenoid valves are configured as cartridge solenoid valves, so that assembly is simplified, and utilization of elastic tolerance compensating elements is unnecessary. A preferred embodiment includes three cylinder bodies connected end-to-end with no increase in cylinder diameter. This embodiment enables the use of identical armatures and identical magnet coils for different valve types, such as 3/2-way solenoid valves or 2/2-way solenoid valves. Also, these valves may be configured as normally open or normally closed, with identical outside dimensions. As such, three cartridge solenoid valves can be combined into a compact triple valve cartridge unit that further simplifies the assembly process.

Valve system for the pre-engagement unit of a braking pressure modulator

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Springe, Germany

Hans-Klaus Wolff