Abstract: A wheel bearing unit for an automotive vehicle, and particularly a vehicle provided with ABS/traction control, includes a wheel bearing that is preferably a two row wheel bearing with the inner ring. A sensor is fixed in rotation with reference to the bearing unit and is supported to the bearing unit. A pulse generating ring is mounted around the sensor and is connected with the rotatable part of the wheel bearing, and particularly with the rotatable inner bearing ring to rotate with the rotatable ring and with respect to the sensor. An additional support bearing is provided for guiding the pulse generating ring and for supporting the pulse generating ring to the sensor to provide a constant air gap between them and to reliably mount the sensor. The additional support bearing is developed as an angular bearing. That angular bearing is prestressed by a spring.

Abstract: In an auxiliary power assisted master cylinder arrangement for a vehicle brake system to generate a controlled brake pressure in associated wheel brake cylinders, there is provided a brake valve with a preceding servo travel simulator to effect a control of the wheel brake cylinders of a vehicle. In one construction of the arrangement, there is interposed between two master cylinder units a pedal-operable device including mechanical cross links connecting with the master cylinder units as well as another cross link connecting with the brake valve. The brake valve is movable into engagement with the servo travel simulator, while the pedal-operable device, under normal braking conditions, is acted upon by the controlled pressure from an auxiliary power source in opposition to the pedal pressure and includes a lock providing for interlocking of all mechanical links in the event of a failure of auxiliary power.