Research Papers

Crash Pulse Analysis Using Event Data Recorders

Filename cmrsc19_46.pdf
Filesize 2 MB
Version 1
Date added June 7, 2009
Downloaded 3 times/fois
Category 2009–CMRSC-XIX–Saskatoon
Tags Session 1A
Author/Auteur Dainius J. Dalmotas, Alan German, Jean-Louis Comeau


Many vehicles equipped with air bags also have on-board crash recording systems that, in the event of a frontal collision, capture information relating to the crash, and the deployment of safety systems such as seat belt pretensioners and air bags. Typically, event data recorders (EDR) store details of the collision itself, such as the crash pulse, seat belt pretensioner and air bag firing times, and also certain pre-crash data elements such as vehicle speed, throttle and brake application, and seat belt use status. For a number of years, collision investigators have been able to download the data stored in many General Motors and Ford vehicles through the use of a crash data retrieval tool. Such records provide an opportunity to gain a better understanding of the parameters related to real-world collisions as they afford access to objective crash data with known levels of uncertainty. The current work uses EDR information from in-depth investigations of real-world collisions in Canada. Frontal impacts are categorized by crash type and severity. The resulting subsets of crash pulses and restraint system activation times are compared to data captured as part of staged crash tests that have been undertaken for both regulatory purposes and research. This provides considerable insight into the utility of regulatory crash tests and the nature of the compliance strategies adopted by vehicle manufacturers.

Dainius J. Dalmotas, Alan German, Jean-Louis Comeau