Method for detecting and predicting ball loss in a ball and ramp arrangement

摘要

A method for detecting a state of ball loss in a ball and ramp arrangement. The method includes providing a power unit having one or more clutch pack assemblies, one or more motors having an engine output shaft, and one or more ball and ramp assemblies. One or more actuation profiles are performed by the motors and a magnitude of the motor current used and a position of the output shaft of the motor are measured during the performance of the actuation profiles. One or more graphics of the motor current will be dependent on the position of the motor output shaft having one or more characteristic curves based on the measured magnitude of the motor current and the measured position of the motor output shaft. The magnitude of the measured motor current is compared with the motor current of the characteristic curve at a given position of the output shaft, and based on this comparison, a state of ball loss is identified.