Airbag Deployment Design For Structure Improvement And Sandwiched Tube-Type Airbag Research

Be regarded as the important component of SRS (Supplemental Restraint System), the airbag has the remarkable effects to the automobile passenger protection while collision happening. As people's requisition for passive safety is increasing constantly, the research and development of the airbag become the focus. This paper concentrates on the deployment system design for airbag structure improvement and preliminary research on sandwich tube-type airbag.Firstly, this paper introduces the drawback (expensive, time waste and pollution) of the traditional airbag static experimental system, and present a new airbag deployment system mainly consisted with an air compressor, pressure vessel and solenoid valve. The whole system use compressed air as the inflow gas source. Through calculating the key parameter of the pressure vessel outlet diameter, limit the gas flow rate into the airbag during deployment. In order to guarantee the experiment effects, establish the environment condition requisition and regulate the experiment operating procedures. Using finite element method, simulate the airbag deployment in computer by inputting the experiment data. Experiment result proves that the system decrease the cost, save the test time and have no pollution. Combination with the Hybrid III dummy, the system can also be used in OOP test research.Secondly, this paper illustrates the mechanism about airbag caused injury. Using the new structure, the Sandwiched Tube-Type Airbag(STAB) want to decrease the deployment time cost and deduce the injury to OOP than the traditional structure airbag. Though the new type airbag deployment simulation, conclude that the STAB deploys fast than the tradition airbag and using less gas mass inflow. Afterward, in order to find out the new structure airbag performance while collision, the sled test was carried out. The sled test result supports the STAB's good mark at passenger protection. Next, create the sled test simulation model in order to decrease the sled test times. Last, establish the OOP (out of position) passenger model to compare the injury severity degree between STAB and traditional airbag. Conclude from the comparison with the simulation data, the STAB can decrease the OOP passenger's head injury.