Specifications

TEBS E2

Brake system

Multi-axle units

Axles or wheels which have had no sensors fitted are indirectly controlled by di-

rectly controlled axles or wheels. Multi-axle units require an almost identical adhe-

sion utilisation on these axles when braking.

If not all wheels have sensors, those axles that have the greatest tendency to lock

up are to be applied with ABS rotational-speed sensors.

Multi-axle assemblies with static axle load allocation only should be equipped in

such a way (brake cylinders, length of brake levers, etc.) that the wheels of all ax-

les reach the locking limit as simultaneously as possible and that a directly con-

trolled wheel does not indirectly control more than two wheels or one axle.

Lifting axles

2S/2M: Lift axles are not to be sensed.

All other system configurations with at least 4S with the exception of drawbar trail-

ers: Lift axles can be sensed with ABS rotational-speed sensors e-f.

Tag axles

Vehicles with tag axles must be equipped with a 4S/2M+1M or 4S/3M system to

prevent the tag axle from locking up.

If the frame is more rigid (e.g. box bodies), a 4S/3M system must be used to pre-

vent the outside wheel from locking up when braking in curves.

Steering axles

Constrained controlled axles are to be treated as rigid axles.

(WABCO recommendation: Trailers with self-steering axles are configured with

4S/3M, 4S/2M+1M or 2S/2M+SLV. If the vehicle is equipped with RSS, one of

these configurations must be used to prevent the vehicle from breaking away in a

curve when RSS actuates.

2S/2M or 4S/2M EBS systems with steering axles: During the type approval for a

trailer, driving tests are to ensure that no impermissible vibrations or course-

deviations occur. The reactions of all available steering axles must be evaluated

during an ABS test. If additional stability is required during ABS operation for a self-

steering axle, the steering axle should be switched to rigid using the speed switch

(ISS).