Rear Axle Module with Multiple Modulators

An anti lock braking system, comprising:

• a front axle brake assembly;
• a rear axle brake assembly having a rear brake for each rear wheel;
• a relay valve for controlling rear axle brakes;
• a plurality of pressure modulator valves operatively connected to the relay valve, each having an outlet connected to one of the rear brakes;
• connector cartridges for sealingly connecting the relay valve and at least one of the pressure modulator valves, the connector cartridges having a first end defining a non rotation-dependent fitting cooperating with a corresponding port cavity to form the sealed connection, and a second end defining one of a threaded fitting and another non-rotation-dependent fitting;
• and
• a sealing element of the connector cartridges disposed on the non rotation-dependent fitting.

A method of connecting brake system components, comprising the acts of:

• connecting one of a relay valve and a first pressure modulator valve to a connector cartridge using a non-rotation-dependent fitting at a first end of the connector cartridge;
• connecting a second end of the connector cartridge to the other of the relay valve and the pressure modulator valve using one of a threaded and a non-rotation-dependent fitting;
• and
• repeating the connecting act between the relay valve and a second pressure modulator valve adjacent to the first pressure modulator valve.

A brake system assembly for a vehicle, comprising:

• a relay valve for controlling rear axle brakes of the vehicle, the relay valve having at least two adjacent outlets for forming fluid connections;
• pressure modulator valves operatively connected to the corresponding adjacent outlets of the relay valve;
• a first connector cartridge forming a fluid passage, having first and second ends respectively forming threaded fluid connections with the relay valve and one of the pressure modulator valves;
• and
• an additional connector cartridge forming a fluid passage, having a first end defining a cartridge fitting insertable in a port cavity of one of the relay valve outlets and of the pressure modulator valves.