SAE EDR Symposium: Day 2, Session 2

Bill Messerschmidt
Manager
Messerschmidt Safety Consultants

The second session today is "Commercial Vehicle Original Equipment Manufacturer (OEM) (and Supplier) Perspectives," with speakers from Daimler Trucks, Volvo Trucks, Navistar, and Meritor Wabco.

The first speaker is Paul Menig from Daimler Trucks North America. Mr. Menig is discussing Safety from Start to Finish. He points out that a heavy vehicle has approximately 10 computers (engine, transmission, ABS, and so on). He points out that the general trend in the trucking industry has been for new technology to begin as an aftermarket option and then move toward greater integration (prep package, pre-delivery) until it becomes an OE factory option.

The next speaker is Timothy LaFon from Volvo Trucks North America. Mack and Volvo are headquartered in Greensboro, NC. The major control units on these vehicles are ABS, Airbags, Electronic Stability Control (ESC), EECU and VECU (Engine and Vehicle Electronic Control Units, respectively). There is also a light control module. He points out that ECUs were not developed for accident or crash investigations, and that physical data need to be considered as well as electronic data.

Beginning in 2002, Volvo does have "freeze frame" data associated with fault codes. Mr. LaFon announced that Volvo DOES HAVE INCIDENT LOGGING. The Volvo EDR, which begins in 2010, has two events: one associated with a Last Stop and one associated with a wheel speed trigger of 10mph/sec. There is one fault associated with VECU faults and one with EECU faults. These have 60 seconds of pre-event and 30 seconds of post-event data at 4Hz.

Airbag control units can be downloaded but need to be sent back to Europe. ABS and ESC systems should be downloaded by the supplier (e.g., Bendix or Wabco).

THIS IS THE FIRST OFFICIAL, PUBLIC ANNOUNCEMENT FROM VOLVO THAT THEIR TRUCKS HAVE AN EDR.

As of now, Mr. LaFon states that all Volvo VECU/EECU downloads must be handled by Tim Cheek (Delta-V Forensic Engineers) or John Steiner (KEVA Engineering). Mr. LaFon states that the reason for this is that they (Volvo) have concerns about data accuracy, evidence spoliation, and that Volvo has no method for selling the EDR Retrieval Tools to the public.

I think it's worth pointing out here that the engineering, research, and crash investigation community have successfully dealt with these very same issues with the other engine manufacturers' EDRs, including self-funding dozens and dozens of research papers over (literally) decades in light vehicle and heavy vehicle EDRs. Ironically, most of that research has been published though SAE.

The third speaker is Alan Korn from Meritor Wabco. Mr. Korn is describing the data monitoring system that Meritor Wabco offers called Safety Direct. This system can monitor and record driver behavior and alert a safety manager of aggressive driving. Safety Direct monitors and records events (10 seconds before and after), and can include video. It can be downloaded directly from the vehicle or it can be uploaded by a telematics system.

The final presentation in this group is from Eric Swenson of Navistar. Mr. Swenson is discussing the electrical, mechanical, space, and power requirements for a J2728-compliant HVEDR.

Visit SAE's page to learn more about the speakers. View the Event Guide for the SAE 2011 Highway Vehicle EDR Symposium (pdf).