Gas generator for air bag
First Claim
1. A gas generator for an air bag comprising a housing having a gas discharge hole, first and second ignition means activated by the impact, and first and second combustion chambers accommodating therein gas generating agents which are ignited and burnt to generate a combustion gas, wherein the first combustion chamber and the second combustion chamber are separated from each other by a partition wall, a volume ratio of the first combustion chamber and the second combustion chamber is adjusted in the range of 1/1 to 9/1 by the partition wall.
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Accused Products
Abstract
The present invention provides a gas generator for an air bag capable of easily adjusting a volume ratio of two combustion chambers while reducing the gas generator in size. A diameter of an inner cylinder 15 disposed in a housing 11 is increased and reduced depending upon its vertical position. Thus, the volume ratio of the first combustion chamber 20 and the second combustion chamber 25 can be changed without changing the height of the housing 11 itself.
57 Citations
10 Claims
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1. A gas generator for an air bag comprising a housing having a gas discharge hole, first and second ignition means activated by the impact, and first and second combustion chambers accommodating therein gas generating agents which are ignited and burnt to generate a combustion gas, wherein
the first combustion chamber and the second combustion chamber are separated from each other by a partition wall, a volume ratio of the first combustion chamber and the second combustion chamber is adjusted in the range of 1/1 to 9/1 by the partition wall.
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5. A gas generator for an air bag comprising a housing having a gas discharge hole, first and second ignition means activated by the impact, and first and second combustion chambers accommodating therein gas generating agents which are ignited and burnt to generate a combustion gas, wherein
the first combustion chamber and the second combustion chamber are separated from each other by separating means having a communication hole, the second combustion chamber is disposed such that it is enclosed by the first combustion chamber, flammability of the second combustion chamber is adjusted by the communication hole.
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9. A gas generator for an air bag comprising a housing having a gas discharge hole, first and second ignition means activated by the impact, and first and second combustion chambers accommodating therein gas generating agents which are ignited and burnt to generate a combustion gas, wherein
the first combustion chamber and the second combustion chamber are separated from each other by a partition wall, the first combustion chamber and the second combustion chamber are brought into communication with each other only through a communication hole formed in the partition wall, a combustion gas generated in the second combustion chamber flows into the first combustion chamber from the communication hole and then, is discharged from the gas discharge hole, a volume ratio of the first combustion chamber and the second combustion chamber is adjusted in the range of 1/1 to 9/1 by the partition wall, and a combustion state of a gas generating agent in the second combustion chamber is controlled by the communication hole.
Specification