Method of determining charging capacitance of capacitor

Details Method of determining charging capacitance of capacitor Method of determining charging capacitance of capacitor

2007-12-18

2007-12-18

Culbreth, Eric (Department: 3616)

Land vehicles

Wheeled

Attachment

C102S207000

Reexamination Certificate

active

11564184

ABSTRACT:
A method of determining a charging capacitance of a capacitor in an air bag system having an electronic control unit for controlling a gas generator, a bus line having a loop wire extending from the electronic control unit, gas generators connected to the loop wire, each gas generator having an igniter connected to the loop wire via a connector, one of the igniter and the connector being provided with an integrated circuit having the capacitor for providing power to a heat generating portion, a switching circuit for turning ON/OFF a supplying of current to the heat generating portion, and a microcomputer unit for controlling the switching circuit, the method including, determining a minimum charging capacitance of the capacitor necessary to operate the igniter based on a charging voltage and a minimum ignition energy required for making the heat generating portion of the igniter generate heat to ignite the priming.

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Munger, A.C., “Electrothermal Response Testing, A Component Development Tool,” Seventh International Pyrotechnics Seminar, Jul. 1980, pp. 461-478, vol. 1, IIT Research Institute, Vail, Colorado.

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