Citation

Ikari T, Kaito K, Nakajima T, Yamazaki K, Ono K. Proc. Int. Tech. Conf. Enhanced Safety Vehicles 2009; 2009.

Copyright

(Copyright © 2009, In public domain, Publisher National Highway Traffic Safety Administration)

DOI

unavailable

PMID

unavailable

Abstract

The JNCAP intends to introduce a minor neck injury protection performance evaluation test method within the JNCAP program. The research began with a 4-year project in 2005. In the first year, rear-end vehicle collision tests were conducted using a MDB to ascertain vehicle rear crash characteristics. In the second year, crash tests were conducted to allow changing the test conditions such as braking effect and excluding the influence of the MDB honeycomb. Basic data collected included floor G during a crash and measurement of the dummy injury level. In the third year, dynamic component sled tests were conducted to select an actual vehicle crash test or sled test. It was found that the vehicle seat structure has a greater influence on the results than the vehicle structure. Additionally, in examining the sled acceleration pulse which represents the vehicle crash, it was found that the crash characteristics of recent vehicles exhibited a triangular pulse rather than a trapezoidal pulse in the actual rear-end vehicle crash test. Delta-V is determined based on the cumulative figures for the rear-end crash accident speed rate. In the final year, all research results and conclusions were incorporated in our test protocol, and trial tests were conducted using the draft test procedure, which consists of the dynamic component sled test with a generic triangular pulse of delta-V=20 km/h. Effective evaluation indices will be finalized using recent biomechanical information. The full text of this paper may be found at: http://www-nrd.nhtsa.dot.gov/pdf/esv/esv21/09-0364.pdf