Electronic seat belt tensioning system

Details Electronic seat belt tensioning system Electronic seat belt tensioning system

B - Operations, Transporting

60

R

B60R 22/48 (2006.01) B60R 21/01 (2006.01) B60R 22/44 (2006.01) B60R 22/46 (2006.01)

Patent

CA 2189640

A method and system (10) for controlling the tensioning of a vehicle seat belt utilizes a control processor (20) and a motor (12) to provide initial tensioning of the seat belt. After initial tensioning, the control processor (20) removes substantially all tension on the seat belt while continuously monitoring seat belt payout via am encoder (18). The system provides out-of-position warnings, and is responsive to vehicle acceleration information from a crash discrimination system (22) and/or an object detecting radar system (26) to control tensioning of the seat belt. The system further provides for earlier seat belt tensioning activation by utilizing a pyrotechnic pretensioner (32) having a replaceable pyrotechnic cartridge (38).

Procédé et système (10) de commande de la tension d'une ceinture de sécurité faisant appel à un processeur (20) et à un moteur (12) créant la tension initiale de la ceinture. Après le tensionnage initial, le processeur de commande (20) relâche la tension sur ladite ceinture tout en contrôlant en continu son déroulement à l'aide d'un codeur (18). Le système émet des avertissements de mauvaise position tout en réagissant aux informations relatives aux accélérations du véhicule émises par un système (22) de détection des collisions et/ou par un radar d'évitement (26) pour commander la tension de la ceinture. Le système peut également assurer le tensionnage de ceintures d'un modèle ancien en recourant à un prétensionneur pyrotechnique (32) à cartouche remplaçable (38).

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