11.14.1. Features of a design
The system of passive safety (SRS) of the car unites in a complex a frontal safety cushion for the driver and seat belts for the driver and all passengers. Seat belts for the driver, the forward passenger and side passengers on a back seat inertial. For the average passenger on a back seat the zone belt is provided.
The safety cushion does not replace a seat belt. Moreover, at the movement of the car the driver has to be surely fastened by a belt as in case of the road accident the worked safety cushion itself can put to the person who is not fastened by a belt a severe injury.
SRS log in:
– the module of a safety cushion of the driver located in a nave of a steering wheel and consisting of the put cover of a pillow and a gas generator;
– the electronic control unit established under facing of a tunnel of a floor and the managing director of system;
– seat belts.
Blow force at the road accident is determined by the electronic control unit (ECU) of system of passive safety by electronic accelerometers. To a signal of accelerometers the control unit activates a safety cushion of the driver software.
If the car is equipped by a prednatyazhitel of a seat belt of the driver, EBU, having received a signal from accelerometers, before activation of a safety cushion increases a belt tension. Prednatyazhitel provides timely response to emergency delay of the car, attracting the driver to a seatback, and also excludes further movement it on inertia and getting injured from the worked safety cushion forward. At front blow of a certain force of EBU of a security system issues the command for a pyrotechnic element of a prednatyazhitel of a belt.
The mechanism of a prednatyazhitel of a seat belt is always put in action earlier, than a safety cushion.