vdid you may find these four (1-2-3-4) links of interest with regard to EDR, its history and evolution, the NHTSA EDR Working Group, and the device which is used to retrieve crash data from the vehicle.
As a participant in the NHTSA EDR Working Group, there was a great deal of information covered over several years of involvement.
- NHTSA EDR Working Group
- Crash Data Retrieval Tool
- Current Crash Data Retrieval list of Supported Vehicles
Here is a brief synopsis of what is currently in the news:
In 2006, the National Highway Transportation Safety Administration issued a rule requiring that after 2011, if a car or light truck does have an EDR, then the EDR must record specified types of data. (Note: this NHTSA rule does not require vehicles to have EDRs, only what they must record if there is an EDR.)
Final rule – event data recorders: 49 CFR Part 563, Docket No. NHTSA-2006-25666. Vol. 71 Federal Register, No. 166, August 28, 2006, p. 50998-51048.
Here are the 15 items to be tracked if the vehicle does track data and most cars and light duty trucks do have EDR.
1. Speed vehicle was traveling at the time of algorithm enable
2. Engine throttle (percentage accelerator pressed)
3. Brake use (was the brake applied? yes/no)
4. Change in forward crash speed (Delta V speed change)
5. Maximum change in forward crash speed
6. Time from beginning of crash at which the maximum change in forward crash speed occurs (typically 100 to 150 ms)
7. Ignition cycle, crash (number of times the engine had been started prior to the crash)
8. Ignition cycle, download (number of times the engine had been started prior to downloading the EDR data)
9. Safety belt status, driver
10. Frontal airbag warning lamp (on/off or problem in system)
11. Driver frontal airbag deployment, time to deploy for a single stage airbag,or time to first stage deployment for a multistage airbag
12. Right front passenger frontal airbag deployment, time to deploy
13. How many crash events?
14. Time between two crash events, if applicable
15. Did the EDR complete the recording?
"I think that the Volt has garnered more awards than any other vehicle in history." Bob Lutz