Relay valve module for use as an axle modulator and trailer control module

A method for providing an axle modulator or a trailer control module, the method comprising:

• providing a relay valve module for an electronically controllable pneumatic brake system for actuating wheel brakes of a utility vehicle, the relay valve module comprising:
• a reservoir connection configured to receive a reservoir pressure;
• a brake control pressure connection configured to receive a brake control pressure;
• at least one first service brake connection configured to output a service brake pressure;
• a relay valve with a relay valve reservoir connection, which is connected to the reservoir connection, a relay valve working connection, which is connected to the first service brake connection, a relay valve ventilation connection, and a relay valve control connection;
• an electropneumatic pilot control unit, which is connected to the reservoir connection, the electropneumatic pilot control unit being configured to provide a pilot control pressure;
• and
• a shuttle valve with a first shuttle valve inlet, a second shuttle valve inlet, and a shuttle valve outlet,
• wherein the first shuttle valve inlet is connected to the brake control pressure connection to receive the brake control pressure, the second shuttle valve inlet is connected to the pilot control unit to receive the pilot control pressure, and the shuttle valve outlet is connected to the relay valve control connection to output to the relay valve control connection the respectively higher of the brake control pressure or the pilot control pressure;
• and
• a) providing a second service brake connection for outputting the service brake pressure for a second vehicle side, or
• b) providing a trailer supply connection which is provided for connecting to a trailer supply pressure connection, to supply reservoir pressure to a trailer.