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    • 2. 发明授权
    • Method for transmitting signals between a microprocessor and an
interface circuit
    • 用于在微处理器和接口电路之间传输信号的方法
    • US5760489A
    • 1998-06-02
    • US726023
    • 1996-10-04
    • Benjamin R. DavisJohn M. PigottKevin S. AndersonCharles R. Powers
    • Benjamin R. DavisJohn M. PigottKevin S. AndersonCharles R. Powers
    • B60R21/16B60R16/02B60R16/03B60R21/01B60R21/00
    • B60R21/017B60R16/0315B60R2021/01075B60R2021/01115
    • A control module (11) in an airbag system (10) supplies electrical energy to and communicates with remote modules (20A-20N) through a two-wire connection. The supplied electrical energy is partially used to operate the remote modules (20A-20N) and partially stored within the remote modules (20A-20N) for deploying squibs (22A-22N). The control module (11) sends command signals to the remote modules 20A-20N) via voltage excursions between a high and an intermediate voltage levels. The remote modules (20A-20N) send signals to the control module (11) via current excursions. When an accident situation is detected, the voltage across the two-wire connection is lowered to a low voltage level, thereby interrupting a normal operation of the airbag system (10). The control module (11) then sends out firing signals via voltage excursion between the intermediate and low voltage levels. The remote modules (20A-20N) decode the firing signals and deploy the squibs (22A-22N) to inflate airbags.
    • 气囊系统(10)中的控制模块(11)通过双线连接向远程模块(20A-20N)提供电能并与远程模块(20A-20N)通信。 提供的电能被部分地用于操作远程模块(20A-20N)并部分地存储在远程模块(20A-20N)内,用于展开爆管(22A-22N)。 控制模块(11)通过高电压和中间电压电平之间的电压偏移向远程模块20A-20N发送命令信号。 远程模块(20A-20N)通过电流偏移向控制模块(11)发送信号。 当检测到事故情况时,两线连接处的电压降低到低电压水平,从而中断气囊系统(10)的正常操作。 控制模块(11)然后通过中间和低电压电平之间的电压偏移发出触发信号。 远程模块(20A-20N)对点火信号进行解码并且布置点火器(22A-22N)以使安全气囊膨胀。
    • 6. 发明授权
    • Squib ignitor circuit and method thereof
    • 点火点火器电路及其方法
    • US5898122A
    • 1999-04-27
    • US674380
    • 1996-07-02
    • Benjamin R. DavisKim R. Gauen
    • Benjamin R. DavisKim R. Gauen
    • B60R21/01F42C11/00
    • B60R21/017
    • A squib ignitor circuit (20,40) reduces the probability of an accidental airbag deployment to greatly increase the safety of an automobile. A squib (24,28,44) operates at a voltage significantly higher than the squib ignitor circuit (20,40) to produce heat sufficient to ignite pyrotechnic material. Thus, a short condition to the squib (24,28,44) does not produce an inadvertent airbag deployment. The squib ignitor circuit (20,40) forms a conductive path through an inductor (23,43) via a first transistor (21,41) and a second transistor (22,42). The inductor (23,43) stores energy. The inductor (23,43) produces a voltage substantially greater than the voltage powering the squib ignitor circuit (20,40) when the conductive path is broken. The inductor (23,43) releases the stored energy to the squib (24,28,44) generating heat. A sequence (more than one time) of storing energy and releasing energy by the inductor (23,43) is required to generate heat sufficient to ignite pyrotechnic material by the squib (24,28,44).
    • 点火器点火器电路(20,40)降低了意外安全气囊部署的可能性,从而大大提高了汽车的安全性。 爆管(24,28,44)以明显高于点火器电路(20,40)的电压工作,以产生足以点燃烟火材料的热量。 因此,对爆管(24,28,44)的短暂状态不会产生无意中的安全气囊部署。 点火器点火器电路(20,40)经由第一晶体管(21,41)和第二晶体管(22,42)形成通过电感器(23,43)的导电路径。 电感器(23,43)存储能量。 当导电路径断开时,电感器(23,43)产生的电压显着大于对点火器电路(20,40)供电的电压。 电感器(23,43)将存储的能量释放到产生热量的爆管(24,28,44)。 需要通过电感器(23,43)存储能量和释放能量的序列(多于一次)以产生足以通过爆管点燃烟火材料的热量(24,28,44)。