| 摘要 |
An operating system and method for a vehicle safety device that includes a housing having a duct, one or more pistons in the duct and a gas generator that has two stages. The first stage is ignited conventionally, but the second stage is ignited automatically with a delay directly responsive to the first stage ignition. The gas generated is fed to a common space in the housing where it drives the piston(s). Each piston has an associated axially spaced thimble with a load limiter between. A cable is connected to each vehicle safety device and to each thimble. When the system is operated, each piston is driven to move its associated thimble away to draw the cable from the associated vehicle safety device to actuate it. However, if a counter force on the cable becomes excessive, the thimble moves closer to the piston and the excessive pressure is relieved under the control of the load limiter.
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