On A Controlled Opposite-Running Test Stand For AWD Vehicles

"Opposite-running" means: the rollers on the one-axle roller test stand are rotated forward on one side and backward on the other side.

During this test, the wheels of one axle are driven in opposite directions, to prevent delivering power to the other axle.

"Regulated" means: the speed of the test stand rollers must be regulated in such a way as to avoid any speed difference during the brake inspection.

The transferring of a force to the rolling wheels in the roller set is prevented by the stationary wheel (outside of the roller set) via the drivetrain.

During testing, the wheel turning forward is measured, therefore two braking tests are necessary on each axle.

Do not exceed a test speed of 6 km/h.

Volkswagen approved test stands meet these requirements.