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Dual stage occupant restraint deployment control for motor vehicle

  • US 6,553,294 B1
  • Filed: 10/16/2000
  • Issued: 04/22/2003
  • Est. Priority Date: 10/16/2000
  • Status: Expired due to Term
First Claim
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1. A method for controlling the deployment of a dual stage occupant restraint in a motor vehicle comprising the steps:

  • sensing a possible crash event;

    sensing a vehicle acceleration and deriving therefrom an acceleration signal;

    deriving a velocity signal from the acceleration signal;

    deriving one or more immunity measures for indicating non-crash events;

    generating a first stage activation signal if the velocity value and all derived immunity measures meet predetermined criteria during the sensed possible crash event;

    deriving a crash severity measure from the acceleration signal, the crash severity measure not being immune from accelerations due to non-crash events; and

    generating a second stage activation signal in response to the crash severity measure meeting predetermined criteria if the first stage activation signal has been generated.

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