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Pedestrian Protection - Influence of Bonnet Design
JUMV/EAEC05YU-GS04

Authors

Jiri Svoboda - Josef Bozek Research Center, Czech Technical University in Prague, Faculty of Mechanical Engineering
Petr Vorlicek - Czech Technical University in Prague, Faculty of Mechanical Engineering
Jiri Vojtisek - Czech Technical University in Prague, Faculty of Mechanical Engineering

Abstract

KEYWORDS:

Pedestrian protection, Active bonnet, Car-to-dummy collision, Headform-to-bonnet impact, HIC

ABSTRACT

In a vehicle-pedestrian impact, the majority of pedestrian fatalities are caused by the head injuries. Accident analysis showed that the bonnet of car and its surrounding often had consequences with severe head injuries in such accidents, especially when young or small pedestrians are involved. The study discuses a potential of active bonnet and shape modifications of chosen structural members of bonnet and fender to reduce the severity of the resulting head injuries. The pedestrian friendliness of the vehicle front end (original and modified) was assessed on the base of data obtained from mathematic simulations (HIC, acceleration etc.) of both headform impact and dummy-to-car impact (50%Hybrid_III and 5%Hybrid_III ware used) to relevant points of vehicle front end. Moreover, simulation results ware discussed in contrast with results of analytic study of impact physics.

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