How to Interpret Heavy Vehicle EDR Data, Day 3

William Messerschmidt
Principal Technical Analyst 

Today marked the third day of the TU HVEDR class, which is the day we set aside for field work and demonstrations.

In the morning, participants got to begin hands-on ECM downloads of Detroit Diesel, Caterpillar, and Cummins ECMs. Dr. Daily and his graduate students also assisted in demonstrating actual data transmissions over the J1939 network.

Freightliner of Tulsa brought a brand new 2012 Freightliner Cascadia with DDEC 10 electronics. Participants got to download the truck using DDEC Reports and DDDL 7 software and see (on a clean, new truck) the parts specific to Sustained Catalytic Reduction (SCR), like the Aftertreatment Control Module (ACM) and Diesel Exhaust Fluid (DEF) tank.

In the afternoon, we went to the Tulsa Fairgrounds and had the chance to test two fully instrumented Kenworth tractors, which were donated by Melton Transportation. Tests were performed with a Road Relay 4 attached, with a Safety Pass Pro attached, and with parameter changes made to some of the trucks' parameters. Using a Video VBox 4, we were able to capture CAN data on vehicle speed, engine speed brake, and clutch status (and other parameters as well).

Thanks to the assistance of the Tulsa Fire Department, Freightliner of Tulsa, Melton Transportation, today's field day was a very successful event!