Abstract: A vehicle's restraint system for passengers such as airbags, belt tighteners or similar devices to protect the passengers in case of a crash against injury includes a gas generator having a normally closed first housing including a solid fuel as a charge to generate gas. A closed second housing is provided, accommodating each of an evaluating circuit or sensor, triggering element and ignition structure. The closed second housing includes a portion which makes an active contact between the ignition structure in the second housing and the charge in the first housing. The two closed housings facilitate storage, assembly and environmentally safe disposal.

Abstract: A vehicle's restraint system for passengers such as airbags, belt tighteners or similar devices to protect the passengers in case of a crash against injury including an electronic sensor circuit for the release of the restraint system, only upon the occurrence of predetermined conditions. An energy supply is provided for supply of the electronic sensor circuit with a proper and set voltage value to be monitored at least from time to time and compared with a reference voltage wherein at least an emergency voltage supply is to be held in a steady state such as at the set voltage value to provide power to electrically ignite a pyrotechnic or propellant charge if triggered by said electronic sensor circuit, in the case that one or more of said predetermined conditions evaluated in said electronic sensor circuit by comparing it with chosen threshold values are fulfilled, indicating that a crash event is detected by an acceleration responsive signal generator in said electronic sensor circuit.