Redundancy valve assembly and brake system having pressure modulation via redundantly formed abs valves

An electronically controllable pneumatic brake system for a vehicle, comprising:

• a service control unit for controlling the electronically controllable pneumatic brake system in an operating mode;
• at least one service axle modulator connected to said service control unit and configured to receive service braking signals from said service control unit and to modulate a service brake pressure for a first axle on a basis of said service braking signals;
• a redundancy control unit for controlling the electronically controllable pneumatic brake system in a redundancy mode;
• at least one redundancy axle modulator connected to said redundancy control unit and configured to receive redundancy braking signals from said redundancy control unit and to modulate a redundancy braking pressure for the first axle on a basis of said redundancy brake signals;
• at least one redundancy valve assembly for redundantly supplying the redundant brake pressure into a service brake pressure path of the electronically controllable pneumatic brake system for a vehicle;
• said at least one redundancy valve assembly including a service brake pressure connection, a redundancy pressure brake connection, and a brake actuator connection for connecting at least one brake actuator;
• said service brake pressure connection being configured to receive a service brake pressure from said at least one service brake pressure modulator;
• said redundancy brake pressure connection being configured to receive a redundancy brake pressure from a redundancy brake pressure modulator;
• said at least one redundancy valve assembly being electrically actuatable in order to optionally modulate the service brake pressure or the redundancy brake pressure at said brake actuator connection;
• said service brake pressure connection being connected to said at least one service axle modulator and configured to receive the service brake pressure from said service axle modulator;
• said redundancy brake pressure connection being connected to said redundancy axle modulator and being configured to receive the redundancy brake pressure from said redundancy axle modulator;
• and,
• said brake actuator connection being connected to at least one first service brake actuator on the first axle.

A method for controlling an electronically controllable pneumatic brake system, the method comprising:

• in an operating mode of the electronically controllable pneumatic brake system, modulating a service brake pressure by a service brake pressure modulator at a service brake pressure connection of a redundancy valve assembly,
• actuating the redundancy valve assembly by a service control unit based on first wheel speed signals and thereby providing slip controlled modulation of the service brake pressure at a brake actuator connection of the redundancy valve assembly;
• and,
• in a redundancy mode of the electronically controllable pneumatic brake system,
• modulating a redundancy brake pressure by a redundancy axle modulator at a redundancy brake pressure connection of the redundancy valve assembly;
• and,
• actuating the redundancy valve assembly by a redundancy control unit based on the first wheel speed signals and thereby providing slip controlled modulation of the redundancy brake pressure at the brake actuator connection.