Patent ID: 7712784
Filing Date: 2010-05-11
Classification: B60R

Abstract:
1. A seatbelt retractor controlling system, comprising: a motor configured to generate a rotational torque for driving a seatbelt retractor; a first electric control unit comprised of a first micro computer for controlling a rotational speed of said motor; and a second electric control unit comprised of a second micro computer which can communicate with an on-board controller or on-vehicle sensor; wherein said second micro computer comprises a driving mode selecting portion which selects one of driving modes for controlling said motor based on a signal from said on-board controller or a sensor; and said first micro computer acquires a buckle switch signal about the on-off state of a buckle switch corresponding to seat belt retractor without passing through said communication line, and selects one of driving modes stored previously in said first micro computer based on the selected mode of said driving mode selecting portion, and controls a driving current supplied to said motor based on the buckle switch signal and the selected driving mode.