Evaluation of the Heavy Vehicle Event Data Recorder for the Freightliner New Cascadia with Detroit Diesel Engines 2019-01-0636

In 2017, Freightliner introduced the New Cascadia model to their lineup of Class 8 trucks. Testing of the Freightliner New Cascadia with Detroit Diesel engines was conducted to evaluate the accuracy of the reported event data contained in the engine Electronic Control Units for these trucks. The testing showed that the time between reported event data points, which is reported to be one second, is not a constant one second, but is variable. The time between reported data points varied from one second (no error) to 1.3 seconds (error of 0.3 seconds). Although the time between data points may have been variable, the magnitude of vehicle speed, engine speed and accelerator pedal application percent were accurate. The reported vehicle speed data was integrated and compared to the instrumented distance to evaluate the error of the distance when the time between data points was greater than one second.