The JNCAP intends to introduce a minor neck injury protection performanceevaluation 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 thetest conditions such as braking effect and excluding the influence of theMDB honeycomb. Basic data collected included floor G during a crash and measurement of the dummy injury level. In the third year, dynamic componentsled tests were conducted to select an actual vehicle crash test or sled test. It was found that the vehicle seat structure has a greater influenceon the results than the vehicle structure. Additionally, in examining thesled 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 For the covering abstract see ITRD E145407.
Abstract