Method for functional testing of ball screw for steering system of motor vehicle, involves evaluating course of moment size within test interval to determine whether moment size is exceeded preset maximum value or threshold value

摘要

The method involves applying an oscillating relative motion having a predetermined frequency and amplitude between a ball screw nut (20) and a spindle (30). The moment size is acquired during application of oscillating relative motion. The course of the moment size within a given test interval is evaluated so as to determine whether the moment size within given test interval is exceeded the preset maximum value or threshold value. An independent claim is included for testing apparatus for functional check of ball screw for steering system of motor vehicle.