SAFETY DEVICE FOR CAR PASSENGERS

摘要

In order to ensure that a safety device for car passengers will continue to work in an emergency even if the safety device is cut from its distribution voltage (UV), two separate back-up energy storages (12, 15) are provided to supply voltage to parts of the safety device. The first back-up energy storage (12) is loaded with a voltage essentially lower than the distribution voltage (UV) via a voltage transformer (11). The second back-up energy storage (15) is normally linked to the distribution voltage (UV) as long as this does not fall below a desired value. When the distribution voltage (UV) falls below a determined desired value, the second back-up energy storage (15) is disconnected from the distribution voltage (UV) by a switch (10a) and loaded with a desired voltage via a second voltage transformer (14). The voltage transformer (14) is powered by the first back-up energy storage (12).