Improvements in or relating to a safety arrangement

摘要

A safety arrangement is provided in a motor vehicle. The safety arrangement comprises a roll sensor apparatus to sense conditions indicative of a roll-over accident to provide an output signal(4) to trigger actuation of a safety device(6). The roll sensor apparatus is responsive to both an angular parameter such as angular speed of the vehicle (#x)(1) - for example, whether the angular speed of the vehicle exceeds a threshold(3) and also responds to the lateral acceleration (ay)(2) - again comparing the latter acceleration with a threshold(5). One or both of the thresholds used for comparison purposes may be a function of another parameter of the vehicle, or may be fixed thresholds.