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Apparatus and method for activating occupant restraint device

  • US 7,076,353 B2
  • Filed: 03/02/2004
  • Issued: 07/11/2006
  • Est. Priority Date: 03/04/2003
  • Status: Active Grant
First Claim
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1. An apparatus for activating an occupant restraint device of a vehicle, said apparatus comprising:

  • a roll condition detector for detecting a roll condition of the vehicle;

    a lateral acceleration sensor for sensing a lateral acceleration of the vehicle in a width direction of the vehicle;

    a trip-over determination unit determining whether an anticipated rollover of the vehicle has a pattern of trip-over in response to both the lateral acceleration and the roll condition of the vehicle;

    a trip-over pattern recognition unit recognizing the pattern of trip-over based on the lateral acceleration of the vehicle, when the anticipated rollover of the vehicle has the pattern of trip-over;

    a rollover determination criteria unit setting a rollover determination criterion for the vehicle depending on the recognized pattern of trip-over;

    a rollover determination unit determining whether the vehicle will roll over based on both the roll condition of the vehicle and the rollover determination criterion for the vehicle; and

    an activation unit activating the occupant restraint device of the vehicle depending on a determined result from said rollover determination unit, the determined result being indicative of that the vehicle will roll over,wherein said trip-over pattern recognition unit recognizes the pattern of trip-over depending on a parameter selected from a set of parameters indicative of characteristics of the lateral acceleration of the vehicle, andwherein the set of parameters indicative of characteristics of the lateral acceleration of the vehicle includes a rate of the lateral acceleration of the vehicle in a rising stage thereof, a maximum value of the lateral acceleration of the vehicle, and a length of duration of the lateral acceleration of the vehicle.

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