Patent ID: 6722462
Filing Date: 2004-04-20
Classification: B60R

Abstract:
An occupant restraint system for a vehicle having an occupant restraint device to permit the occupant restraint device to be deployed for restraining an occupant in the vehicle when impact, applied to the vehicle, is detected, said system comprising:an impact detector unit including at least two impact sensors detecting impact to a vehicle to provide sensory outputs representative of impact status, said impact detector unit being responsive to the impact status for providing at least two discriminating factors based on which at least two predetermined transition processes are set, to cause said occupant restraint device to be deployed, and producing information representing an enabled/disabled state of said discriminating factors related to transition process information; and a control unit outputting an actuation signal to said occupant restraint device when there is a confirmed match between a variation in said information representing said enabled/disabled state received from said impact detector unit, and said transition process information, wherein: said impact detector unit includes a first impact sensor and a second impact sensor; and wherein said discriminating factors include an actuation demand timing judgment factor which is enabled when an integral result of a sensory output of said first impact sensor exceeds a first threshold value, a calculation enabling judgment factor which is enabled when the sensory output of said first impact sensor exceeds a second threshold value, and an operation enabling judgment factor which is enabled when an integral result of a sensory output of said second impact sensor exceeds a third threshold value.