<P> Airbag suits have also been developed for use by Motorcycle Grand Prix riders . In their earlier form, they were connected to the motorcycle by a cable and deployed when the cable became detached from its mounting clip, inflating to protect the back of the rider . The French manufacturer Helite specializes exclusively in developing airbag jackets for motorcyclists, snowmobile riders and horseback riders . Further developments were conducted by Dainese and led to an autonomous system on board the leathers, without a cable connected to the bike . Instead, an electronic system detects a fall and triggers the inflation of the nitrogen airbags to protect the rider's upper body . </P> <Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2016) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2016) (Learn how and when to remove this template message) </Td> </Tr> <P> The airbags in the vehicle are controlled by a central Airbag control unit (ACU), a specific type of ECU . The ACU monitors a number of related sensors within the vehicle, including accelerometers, impact sensors, side (door) pressure sensors, wheel speed sensors, gyroscopes, brake pressure sensors, and seat occupancy sensors . The bag itself and its inflation mechanism is concealed within the steering wheel boss (for the driver), or the dashboard (for the front passenger), behind plastic flaps or doors which are designed to "tear open" under the force of the bag inflating . Once the requisite' threshold' has been reached or exceeded, the airbag control unit will trigger the ignition of a gas generator propellant to rapidly inflate a fabric bag . As the vehicle occupant collides with and squeezes the bag, the gas escapes in a controlled manner through small vent holes . The airbag's volume and the size of the vents in the bag are tailored to each vehicle type, to spread out the deceleration of (and thus force experienced by) the occupant over time and over the occupant's body, compared to a seat belt alone . </P>

Working of air bags to prevent the time of injury