Vehicle occupant protection apparatus
First Claim
1. A vehicle occupant protection apparatus comprising:
- a power source capable of supplying electric power;
a constant voltage circuit capable of outputting a predetermined voltage by converting a voltage of the power source in an electrical connection with the power source;
a plurality of ignition circuits capable of supplying an ignition current for respective squibs by having an electrical connection with the power source;
a capacitor capable of reducing noise, wherein the capacitor is in an electrical connection with a connection point between the constant voltage circuit and the plurality of ignition circuits on one end, and wherein the capacitor is in an electrical connection with a ground on another end; and
a discharge circuit capable of discharging electricity stored in the capacitor immediately after a supply of the ignition current from an ignition circuit has finished being delivered.
1 Assignment
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Accused Products
Abstract
An air bag device of the present invention includes squibs and a capacitor, an electric discharge circuit as well as a backup power supply, a voltage stabilizer and ignition circuits. The voltage stabilizer converts the voltage of the backup power supply to the predetermined target voltage, and the converted voltage is supplied for the ignition circuit. The capacitor removes a noise emitted by the ignition circuit. The electric discharge circuit discharges electricity accumulated in the capacitor right after the supply of an ignition current from the ignition circuit has ended. In this manner, a voltage rise of the capacitor occurring after the end of the supply of the ignition current can be resolved immediately, thereby enabling a supply of a stable ignition current for the squibs.
12 Citations
5 Claims
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1. A vehicle occupant protection apparatus comprising:
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a power source capable of supplying electric power; a constant voltage circuit capable of outputting a predetermined voltage by converting a voltage of the power source in an electrical connection with the power source; a plurality of ignition circuits capable of supplying an ignition current for respective squibs by having an electrical connection with the power source; a capacitor capable of reducing noise, wherein the capacitor is in an electrical connection with a connection point between the constant voltage circuit and the plurality of ignition circuits on one end, and wherein the capacitor is in an electrical connection with a ground on another end; and a discharge circuit capable of discharging electricity stored in the capacitor immediately after a supply of the ignition current from an ignition circuit has finished being delivered. - View Dependent Claims (2, 3, 4, 5)
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Specification