Speed and passenger boarding status of the first stage and the second inter-stage expansion of two inflators in accordance with the deployment environment In the ignition control device and method for two-stage expansion of an inflator to the air bag for adjusting the delay, the collision signal input unit for receiving a collision detection signal from a crash sensor; Development environment input unit to convert the deployment environment variables related to air bag deployment receive signals from the vehicle sensor; Development environment delay input that receives the second end of the ignition delay time to the variable value; The delay time storage unit for storing the inputted delay; A timer for counting the delay time; Deployment signal output unit for outputting an ignition signal to the first stage or the second stage; When the input to the collision detection signal and outputs the ignition signal of the first stage and counts a delay time corresponding to the deployment environment variable, if the count is terminated, provide a configuration in which a control unit for outputting an ignition signal of the second stage If. ; by the ignition control device and method for two-stage expansion of the airbag inflator as described above, the passenger boarding rate and condition such as the development environment prescribed delay time according to a combination of a variable in advance a conflict is detected, by outputting an ignition signal after a fixed delay of the second stage, the ignition control of the two-stage expansion inflator can be implemented in a more economical, more reliable ignition of the second stage expansion to minimize the error of the inflator ignition control by the measurement error of the sensor the control device can be implemented.
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