Air brake systems for trailers

Tietjen provides first class solutions for trailer air brake systems customised to each trailer type. Customer requirements and particular requests are always taken into consideration.

The basis for designing an air brake system for a trailer is the brake calculation. This calculation is used to determine, among other things, the following:

• Brake cylinder size
• Brake lever length
• Air reservoir volume
• Values for load sensing valve settings
• Braking equipment to be installed and the sequence of the equipment within the brake system
• For EBS systems: basic information for commissioning the system

With the help of our brake calculation data sheet, all necessary data is inquired. We then prepare the brake calculation and develop the air brake system.

With new developments in particular, it is important that the pressure build-up time – the response behaviour of the air brake on the trailer – is checked. The time required until the pneumatic control signal for braking comes in at the furthest wheel brake cylinder is measured. The pressure build-up time may be max. 0.4 sec as per Regulation (EU) 2015/68. If the pressure build-up time is too high, this can result in a delayed braking, delayed brake release and eventually damage to the tractor unit's service brake.

Finally, the pressure build-up time measurement ensures that the designed trailer air brake system is working correctly. Pressure build-up time measurements are part of our daily business. A service we are happy to offer you.