Patent ID: 7828350

Claim:
A collision detection apparatus for a vehicle, wherein the collision detection apparatus detects collision of the vehicle with an object, the collision detection apparatus comprising: a bumper reinforcement that is configured to extend in a transverse direction of the vehicle; a bumper cover that covers a front side of the bumper reinforcement, the bumper cover being displaceable relative to the bumper reinforcement toward a rear side of the vehicle upon the collision; a chamber forming member that is provided between the bumper reinforcement and the bumper cover, the chamber forming member defining a chamber space that is deformable upon displacement of the bumper cover relative to the bumper reinforcement; a pressure sensor that senses pressure in the chamber space; pressure changing means for changing pressure in the chamber space when the pressure changing means is in operation; and chamber state detecting means for detecting whether or not the chamber forming member is broken based on the pressure, which is detected by the pressure sensor while the pressure changing means is in operation.