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Airbag Deployment

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Old Oct 16, 2018 | 02:56 PM
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Default Airbag Deployment

Does anyone have the fact sheet from FORD MOTOR COMPANY referencing when exactly or at exactly what angle in "DEGREES" the side and or front airbags deploy? I.E. Pitch, Steering Angle and Roll. I.E. Incline/Decline angles (upward/downward) of when the airbags deploy. Side Pitch Angle deployment etc...
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Old Oct 16, 2018 | 03:00 PM
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impossible to tell, a lot of factors go into deployment

angle of impact, direction of impact, rate of deceleration, point of impact. there is no "fact sheet" just a combination of algorithms
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Old Oct 16, 2018 | 04:04 PM
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Originally Posted by djfllmn
impossible to tell, a lot of factors go into deployment

angle of impact, direction of impact, rate of deceleration, point of impact. there is no "fact sheet" just a combination of algorithms
X2 on this - So many sensors collection data to determine if the vehicle is going roll over and it needs to deploy airbags. I am almost positive it won't deploy them unless it's certain the vehicle is going to roll over - meaning they won't go off from just off-roading down a hill, etc. Someone else with more knowledge can chime in, but I have never seen them deploy unless the vehicle has crashed or the system is certain a rollover is going to happen.
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Old Oct 16, 2018 | 04:21 PM
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Back in the early days when there was just a single driver air bag and even up to including the passenger air bag the system was fairly rudimentary, if a safing sensor and a primary sensor received enough impact the bags deployed.

Today's systems are much more sophisticated as stated above, loads of sensor input determines exactly what deploys or not, not all bags will deploy unless it's a wreck one is not likely to walk away from. Here's a snip from the 2013 shop manual principles of operation. Keep in mind this is 5 y/o technology and is likely even more sophisticated today.

Principles of Operation

The Restraints Control Module (RCM) continuously receives/monitors all inputs from the following Supplemental Restraint System (SRS) components.
  • LH and RH front impact severity sensors
  • Driver and passenger front door side impact sensors
  • Driver and passenger second row side impact sensors
  • Safety belt buckle switches (driver and passenger)
  • Driver seat track position sensor
  • Occupant Classification System Module (OCSM)
If the RCM detects sudden vehicle deceleration and/or lateral deceleration based on all the information received from all sensors and switches and determines that deployment is required, the RCM sends voltage and current to deploy the appropriate SRS components.

The RCM contains an internal sensor that detects vehicle rollover angles. If the RCM determines that a rollover condition exists and deployment is required, the RCM deploys the applicable SRS components.

During a frontal or side crash, the RCM can deploy the following SRS components, based on crash severity and sensor input.
  • Safety belt retractor pretensioner(s)
  • Seat side air bag(s)
  • Safety CanopyŽ
  • Driver and passenger dual-stage air bag(s) (one or both stages)
The fact that the safety belt pretensioners, Safety CanopyŽ or air bags did not activate for both front seat occupants in a crash does not indicate that something is wrong with the system.

The RCM carries out a self-test of the SRS during each startup. If a SRS fault exists, the air bag warning indicator illuminates and remains illuminated for the rest of the ignition cycle. In addition to the self-test at start up, the RCM continuously monitors all of its SRS components and circuitry for correct operation.
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If you wanted more in depth information you would have to be a technician currently employed at a Ford dealer.

Ford does offer training both online and in class for the general public on certain subjects, if you wish to learn more see the following link.

https://www.motorcraftservice.com/product/training
.

Last edited by RLXXI; Oct 16, 2018 at 04:23 PM.
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Old Oct 16, 2018 | 06:51 PM
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Thanks, good data.
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