US Patent 7333883 Logic and a method for detecting a vehicle rollover

A logic for detecting vehicle rollover includes a first main activation path activated by vehicle lateral acceleration and a second main activation path activated by vehicle vertical acceleration. The logic also includes a first additional activation path activated by vehicle roll angle, a second additional activation path activated by vehicle roll rate, and a third additional activation path activated by vehicle longitudinal acceleration. Activation of each path results from the sensor specific for that path when the output exceeds a threshold value. Logic activation occurs when at least one main activation path and at least one additional activation path are activated.