Method and system of a vehicle for reversible seat belt retraction

A retraction control system of a vehicle for controlling retraction of a seat belt of a reversible seat belt retractor arrangement for a vehicle occupant, the retraction control system comprising:

• a determining unit adapted for determining fulfillment of an activation condition (C-Activate) based on an initiating input derived from a vehicle situation sensing system, the initiating input indicating that the vehicle, at an initiating time instant, is considered likely to be, or is about to become, involved in a hazardous situation and/or uncomfortable dynamic situation;
• and
• a generating unit adapted for generating an activation signal (S-Activation) utilizable for initiation of retraction of the seat belt;
• wherein the generating unit further is adapted for generating a deactivation signal (S-Deactivation) utilizable for aborting the initiation if the determining unit determines absence of fulfillment of a confirming condition (C-Confirm) within a predetermined confirming time period (ΔC), and/or if the determining unit determines fulfillment of an abort condition (C-Abort) within a predetermined abort time period (ΔA), and
• wherein the confirming time period (ΔC) and the abort time period (ΔA) respectively fall within a predetermined non-restraining time period (ΔN-R) characterizing the reversible seat belt refractor arrangement, during which non-restraining time period (ΔN-R) the reversible seat belt refractor arrangement is unable to apply a noticeable restraining force by means of the seat belt to the vehicle occupant.