Potential of a Precrash Lateral Occupant Movement in Side Collisions of (Electric) Minicars |
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| Authors: | T. Hierlinger M. Lienkamp J. Unger T. Unselt |
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| Affiliation: | 1. Institute of Automotive Technology, Technische Universit?t München, Garching, Germanyhierlinger@ftm.mw.tum.de;3. Institute of Automotive Technology, Technische Universit?t München, Garching, Germany;4. Autoliv B.V. &5. Co. KG, Dachau, Germany;6. Daimler AG, Sindelfingen, Germany |
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| Abstract: | Objective: In minicars, the survival space between the side structure and occupant is smaller than in conventional cars. This is an issue in side collisions. Therefore, in this article a solution is studied in which a lateral seat movement is imposed in the precrash phase. It generates a pre-acceleration and an initial velocity of the occupant, thus reducing the loads due to the side impact.Methods: The assessment of the potential is done by numerical simulations and a full-vehicle crash test. The optimal parameters of the restraint system including the precrash movement, time-to-fire of head and side airbag, etc., are found using metamodel-based optimization methods by minimizing occupant loads according to European New Car Assessment Programme (Euro NCAP).Results: The metamodel-based optimization approach is able to tune the restraint system parameters. The numerical simulations show a significant averaged reduction of 22.3% in occupant loads.Conclusion: The results show that the lateral precrash occupant movement offers better occupant protection in side collisions. |
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| Keywords: | precrash occupant movement integral safety side impact vehicle safety |
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