Detonation circuit for a vehicle air bag
    71.
    发明授权
    Detonation circuit for a vehicle air bag 失效
    用于汽车空气袋的爆震电路

    公开(公告)号:US5134306A

    公开(公告)日:1992-07-28

    申请号:US466340

    申请日:1990-05-09

    摘要: A detonation circuit for an inflation capsule (10) of a vehicle air bag has a capacitor (20) which supplies energy to the capsule during a crash condition. The circuit has a transformer (12), the energy source (20) being electrically connectible to the primary coil (P) thereof by two transistors (30, 48) which assume a conducting state when associated control means (16, 18) determine that a crash condition has occurred. Only when both transistors conduct can the energy source (20) cause a change in the current flow through the primary coil (P), which in turn induces a change in current in the secondary coil (S) to which the capsule (10) is connected.It has been found that by monitoring the voltage and current characteristics in the primary coil (P), the state of the capsule (10) can be monitored. For example, it can be determined whether the capsule has fired, and if so further firing pulses may be suppressed.

    摘要翻译: PCT No.PCT / EP88 / 00819 Sec。 371日期1990年5月9日 102(e)日1990年5月9日PCT提交1988年9月9日PCT公布。 出版物WO90 / 02672 日期:1990年3月22日。用于汽车安全气囊的充气胶囊(10)的爆震回路具有在碰撞状态期间向胶囊提供能量的电容器(20)。 该电路具有变压器(12),能量源(20)可通过两个晶体管(30,48)与初级线圈(P)电连接,当相关联的控制装置(16,18)确定 发生了碰撞状况。 只有当两个晶体管导通时,能量源(20)才能引起通过初级线圈(P)的电流的变化,这又导致了胶囊(10)所在的次级线圈(S)中的电流变化 连接的。 已经发现,通过监测初级线圈(P)中的电压和电流特性,可以监视胶囊(10)的状态。 例如,可以确定胶囊是否已经燃烧,并且如果可以抑制进一步的点火脉冲。