Abstract: A wheel bearing unit that measures the contact forces between the tire and the road under all driving situations including operation of the brake, and provides information for the vehicle operation control systems and for optimizing the braking process, the unit including first sensors arranged on the stationary part of the wheel bearing in order to measure the forces acting in the wheel bearing, and second sensors arranged on a support members for the disk-brake caliper for continuously determining the acting braking forces.

Abstract: The invention relates to a protective arrangement with a rolling bearing unit with ABS capability which has a structurally integrated angle transmitter. The angle sensor is connected to a rotatable bearing ring so that it can rotate and has permanent magnet poles for coupling with an external sensor. The invention includes a weak magnetic cover which is located on the rolling bearing unit at a distance from the angle transmitter in such a way that a magnetic shield is formed between the angle transmitter and the environment outside.

Abstract: A wheel bearing for measuring the contact forces between tire and road. The forces which act between the road and the tire in a vehicle are to be recorded under all driving situations including operation of the brake. This information about the currently acting forces is used by vehicle operation control systems and for optimizing the braking process. For this purpose, first sensors are arranged on the stationary part of the wheel bearing in order to measure the forces acting in the wheel bearing. In addition, the currently acting braking forces are continuously determined by means of the second sensors, which are arranged on support members 6 for the disk-brake caliper. During unbraked travel, conclusions can be drawn directly on the forces acting between the road and the tire from the measurement results from the firt sensors.

Abstract: To make available to the vehicle control systems more information on the forces and directions of the forces which act on the individual tires, in order to determine these forces, the displacements between the outer ring and inner ring in the wheel bearings are measured in a contactless fashion using ultrasound. Displacements are measured by one or more sets of an ultrasound transmitter and a receiver on the stationary ring and a reflection surface on the rotating ring for reflecting back the ultrasound energy. The measured time until the signal is received enables displacement to be determined. It is possible to use these displacements to calculate the forces acting from a knowledge of the spring characteristic of the wheel bearings.