The invention concerns a system for assisting regeneration of a particulate filter arranged in an exhaust line of a diesel engine associated with a oxidizing catalyst, the engine being equipped with feeding means for injecting into the cylinders thereof at least one post-injection. A variable reluctance sensor is coupled to a resistive element, which filters a portion of a basic output signal generated by the VRS having a frequency above a prescribed threshold level, thus removing high-frequency noise from the basic output signal. The pivot mechanism includes a latch rotatable about the first axis of rotation between a latched position and an unlatched position.