座椅安全气囊Training

nullGeneral presentation: Side impact By Séverine Wollin Technical consultant Side impact. General presentation: Side impact By Séverine Wollin Technical consultant Side impact.General presentation : side impactECE R95 EuroNCAP US LINCAP Pole test Out Of Position (OOP) IIHS General presentation : side impactRequirementsFMVSS 214 PROTECTION The airbag protect the occupant in a side crashPROTECTION The airbag protect the occupant in a side crashGeneral presentation : SABPole against vehicleVehicle against vehicleGeneral presentation : SABThorax airbag: a pressured bag is positioned between the door and the occupant to protect the ribs and the abdomen of the occupant. It is usually used together with a head protection system.General presentation : SABGeneral presentation : SABA head and thorax module protect the ribs, the abdomen and the head of the occupant. It is usually used in cabriolet vehicle or vehicle not equipped with IC. It is mounted in the vehicle the same way as a thorax module.General presentation : SABGeneral presentation : SABThe thorax and pelvis module protects the ribs the abdomen and the pelvis of the occupant. It pushes on the pelvis to increase the protection in severe crash or with poor vehicle characteristics. It is mounted in the vehicle the same way as a thorax moduleGeneral presentation : SAB SAB visible SAB visible The bag opens the cover to deploy.Seat upholsterySeat frameSectionGeneral presentation : SABModule SAB semi visibleSAB semi visible The module is hidden behind seat upholstery but function is same as visible moduleSide clip sewn on the seat upholstery MODULE Seat upholsterySECTIONOpening line of the seat upholsteryAfter deploymentGeneral presentation : SAB SAB unvisible SAB unvisibleThe bag must break the seam of the seat upholstery to get outSeat upholsteryMODULESECTIONGeneral presentation : SAB SAB in door SAB in doorThe bag must open the door cavity to get out. This is not preferred design, it has to be used for example at the back seat when the seat are removable and the module can not be in the seat.MODULE fixed on doorDoor trimCavityGeneral presentation : SAB REAR SAB REAR SABThe module can be visible or unvisibleGeneral presentation : SABComponents Components X1X1X1X1X1Mode de fixation CoverDeflectorInflated bagInflatorBracket if neededGeneral presentation : SABFoldings Foldings General presentation : SAB3 main type of folding: Inboard Roll Outboard roll Z fold (not recommended due to OOP) The decision on the folding type is made by: - Deployment performance (time, direction) - OOP requirements - Space in cover (very important to try to get as much space as possible from seat supplier)SAB assemblySAB assemblyX1X1X1X1X1Mode de fixation 1- Assembly deflector with inflator 2- Assembly deflector/inflator in bag 3- Assembly bag in cover 4- Attachment of inflator on container 5- Bag folding 6- Cover close General presentation : SABModule is then assemble onto seat frame with 2 nuts. Bag pressure Bag pressure Hybrid inflator (PYRO+GAZ) TYPE ASH1General presentation : SABPyrotechnical inflator TYPE ASP2See design guide lines for detailsBag Bag The bag is made from fabric closed by a seam, the silicon which gives impermeability is on the inside of the bag. Vents holes help the gas evacuation which help the energy absorption. Some features can be added like tear seam, tether, diffuser loop…VentSeamInflator positionGeneral presentation : SABBetter protection Better protection Rib deflection curvesRib deflection 27 mm Rib deflection 37 mm--- with SAB thorax__ Without SAB thoraxGeneral presentation : SABValidation Validation Simulation if possible. Static tests in fixture. Static tests in seat. Drop rig Sled tests OOP when requirements Full scale crashGeneral presentation : SABGeneral presentation: Inflatable curtain (IC) General presentation: Inflatable curtain (IC)Protection To protect occupant’s head during a side crash.Protection To protect occupant’s head during a side crash.General presentation : Inflatable curtainPole crashCar/carRoll overGeneral presentation : Inflatable curtainHead protection by deploying a pressurized bag on the side of the head liner between the impact and the occupant’s heads.General presentation : Inflatable curtainGeneral presentation : Inflatable curtainThe folded bag is positioned between the head liner and the vehicle side frame. The inflator is positioned at the B pillar or C pillar.Folded bagInflatorFolded bagHead linerVehicle side frameInflatorVehicle side frameÜ ForwardC pillarGeneral presentation : Inflatable curtainGeneral presentation : Inflatable curtainGeneral presentation : Inflatable curtainDoor mounted IC Same function as an IC but located in the door, aimed at cabriolet cars.ComponentsComponentsX1X1X1X1X1Mode de fixation FONCTION: Fix module on vehicleClipsWrapper (PA, PP)FONCTION: maintain folded bag.BagFONCTION: Maintain a pressurized volumeComplete moduleInflatorFONCTION: Give gasGas pipe (metal or plastic)FONCTION: diffuse gas into bag.Other: Clamp…General presentation : Inflatable curtainFolding Folding General presentation : Inflatable curtainBag pressure Bag pressure The inflator will inflate the bag in less that 30ms.Hybrid inflator (PYRO+GAZ) type ASH1 used for bag volume ~ 12LHybrid inflator (PYRO+GAZ) type ASH2 used with bag volume ~18LGeneral presentation : Inflatable curtainBag Bag The bag can be sewn or OPW: - 1: 2 main panels are assemble by a seam, silicon coating is inside the bag - 2: Weaving (One Piece Woven) simultaneously of the 2 panels of the bag , the silicon is added on the outside of the bag.Bag OPWGeneral presentation : Inflatable curtainGeneral presentation : Inflatable curtainThe IC function is to share the energy (or the velocity) of the occupant head. The deceleration of the head in a crash must be below 80g.General presentation : Inflatable curtainVehicle crash with and without IC Vehicle crash with and without IC -- with IC-- without ICAcceleration head / timeContact head/ICContact head/poleWith ICWithout ICGeneral presentation : Inflatable curtainValidation Validation Simulation when possible. Static tests in fixture. Static tests in trims. Drop rig Sled tests OOP Full scale crash General presentation : Inflatable curtainPatent Patent General presentation : Side impactWhen developing a product it is important to check that: - Our design does not infringe existing patent. - If our design use a “new” feature then it should be patented. Contact Severine or Henning Koch for more details. Useful info Useful info http://www.nhtsa.dot.gov http://www.hwysafety.org/ http://www.sae.org/ http://www.euroncap.com/ http://interregs.autoliv.com/intereur.pdf Design guide lines: http:/anahome.autolivasp.com/research/ihome.html userid: designstd password: designstd2 Seat and vehicle integration are very important. For more info contact Severine, Henry Lu or Justin Song.General presentation : Side impact