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Method of determining the crash phases relevant to the triggering of a passive safety device in a vehicle

  • US 6,952,636 B2
  • Filed: 05/13/2004
  • Issued: 10/04/2005
  • Est. Priority Date: 11/13/2001
  • Status: Active Grant
First Claim
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1. A method of determining crash phases relevant to a triggering of a passive safety device in a vehicle, the method comprising the acts of:

  • obtaining an acceleration signal representative of an acceleration acting in a longitudinal direction of the vehicle;

    starting two window integrals simultaneously with a start of a crash-caused deceleration of the vehicle, by which two window integrals the acceleration signal is added or integrated over pre-determined time windows;

    setting a first time window to be equal to or less than a minimal triggering time for triggering the safety device and a second time window to be significantly longer than the first time window; and

    defining a time period during which the window integrals have the same value, and during which said same value is greater than a threshold value, as a first crash phase relevant to the triggering of the passive safety device in the vehicle.

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