汽车安全气袋的点火电路

Ignition circuit for automotive airbag system

针对如何通过汽车安全气袋点火电路设计 ,有效发出点火信号并防止安全气袋的漏点火和误点火两种非常严重的问题 ,介绍了点火电路的工作原理 ,并从点火电源、系统掉电、电路及气袋故障、路面干扰、上电干扰等方面分析了产生这两种问题的原因 ,提出了相应的措施 ,保证气袋控制系统有高可靠性和抗干扰能力。

Automotive airbags protect passengers in accidents. The ignition circuit is an important part of the airbag control system to prevent faulty ignitions but to ignite when needed. The analyses of ignition circuit include the selection of the proper ignition power, the design of the backup power, the detection of circuit and airbag failure, the suppression of disturbances by rough roads, and the elimination of the power on statical interference. Some methods were given to improve the reliability and suppress disturbances in the airbag control system. The methods are proven to be effective in tests.