Abstract: A control system for an occupant restraint system mounted on the vehicle including an air-bag to protect the vehicle occupant from direct contact with a steering wheel or a windshield, comprises a control circuit for detecting deceleration of the vehicle, for integrating the value obtained by subtracting a predetermined integration offset from the deceleration to obtain an integrated value, for making a decision to operate the occupant restraint system when the integrated value exceeds a predetermined threshold level, for calculating a physical amount representative of a deceleration condition of the vehicle, for setting a changing timing at which the integration offset is changed in accordance with the physical amount, and for changing the integration offset of the changing timing.

Abstract: A control system for an occupant restraint system including an airbag which is mounted on an automotive vehicle to protect a vehicle occupant from coming into direct contact with a steering wheel and/or a windshield. The control system comprises a control circuit including a microcomputer. The microcomputer is adapted to execute the following control. A decision is made to operate (inflate) the airbag when a vehicle deceleration exceeds a predetermined threshold level. The threshold level is changed at a timing which is set in accordance with a physical amount representative of a deceleration condition of the vehicle, thereby securely operating the airbag merely by making a simple adjustment to the control system.