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Vehicle airbag deactivation switch circuit

  • US 5,992,880 A
  • Filed: 12/18/1997
  • Issued: 11/30/1999
  • Est. Priority Date: 12/18/1997
  • Status: Expired due to Term
First Claim
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1. An airbag restraint system for use in an automotive vehicle having an instrument panel and steering wheel, the airbag restraint system comprising:

  • a first airbag adapted to be mounted in the instrument panel;

    a second airbag adapted to be mounted in the steering wheel;

    an airbag activation circuit for selectively actuating the first and the second airbags, with the activation circuit including a first firing mechanism operatively engaging the first airbag, a second firing mechanism operatively engaging the second airbag, a diagnostic module, and a firing circuit operatively engaging the first and the second firing mechanisms; and

    a deactivation circuit, connected between the diagnostic module and the first and the second firing mechanisms, including a four position switch, with the first firing mechanism connected to two of the switch positions and the second firing mechanism connected to two of the switch positions, and with the deactivation circuit further including a first fuse connected to the switch at two different switch positions than the first firing mechanism in parallel with the first firing mechanism, and a second fuse connected to the switch at two different switch positions than the second firing mechanism in parallel with the second firing mechanism, such that when the switch is at one of the two positions to which the first fuse is connected, the first firing mechanism is disconnected from the switch and when the switch is at one of the two positions to which the second fuse is connected, the second firing mechanism is disconnected from the switch.

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