Telescopic device e.g. vibration damper, for motor vehicle, has detectors fixed on cylinder and extending parallel to rod such that bar has region covering rod`s surface zone having axial dimension greater than that of reference pattern

摘要

The device has a cylinder receiving a rod (3) and a detection device detecting position of the rod with respect to the cylinder. The detection device has a bar (11) with hall effect detectors (12), fixed on the cylinder, extending parallel to the rod such that the bar has a region covering a rod`s outer surface zone having an axial dimension greater than that of a reference pattern formed by a flange and a magnetic layer of the rod.