Distributed airbag firing system and interface circuit therefor

Details Distributed airbag firing system and interface circuit therefor Distributed airbag firing system and interface circuit therefor

1999-01-14

2000-12-26

Paladini, Albert W.

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

307 107, 307127, 307138, 320DIG15, 361245, H02H 320

Patent

active

061664510

ABSTRACT:
A distributed airbag firing system (10) includes a controller (12) receiving sensor signals from a sensor (20) over a two-wire bus (18). The controller provides a firing command over to the two-wire bus to a squib driver circuit (26), which provides the firing current necessary to detonate a squib device (32) and inflate the airbag. The squib driver circuit includes a rectifier (42) with its first and second inputs interchangeably connected to the two-wire bus. The rectifier circuit converts the voltage orientation on the first and second conductors to a positive potential on a first output conductor and a negative or ground potential on a second output conductor. The interchangeability of the first and second inputs of the rectifier to the two-wire bus makes the connection arbitrary and fail-safe.

REFERENCES:
patent: 4008473 (1977-02-01), Hinachi et al.
patent: 4139880 (1979-02-01), Ulmer et al.
patent: 4390792 (1983-06-01), Meyer et al.
patent: 4420786 (1983-12-01), Toney
patent: 5182466 (1993-01-01), Ohkubo

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