用于汽车安全气囊的气体发生器产气性能研究

Study on Efficacy of Gas Generator for Car Safety Airbag

建立了模拟汽车碰撞过程的实验系统;利用该系统模拟汽车碰撞时产生的撞击信号触发气体发生器开始工作,对模拟安全气囊的密闭、定容积的充气筒内产生的p-t曲线、气体发生器内部的p-t曲线、撞击时产生的a-t曲线进行测试并得到相关测试参数值;从而对气体发生器的产气性能进行研究。测试结果表明,温度对安全气囊的工作有一定影响。利用该测试系统测试得到的数据与美国BREED公司对同类产品的测试结果比较,有很好的相比性,测得的数据可作为气体发生器生产质量的检验依据。

An experimental system of simulated car crash is established. By this system, a trigger signal is produced when simulated car crash happens. This signal starts the gas generator to work to produce a definite voltrne of air in a closed cylinder. The p-t curves in gas cylinder and gas generator are measured by pressure sensors. The a-t curve is measured by accelerator sensor when car crash. From these curves relevant measured parameter value is obtained to study the efficacy of the gas generator . The tested results indicate that temperature affects in certain extent the work of airbag. The data measured by this test system are compatible with that of BREED Co., （US）, and could be used as quality oontrol criteria for the gas generator.