Browse Publications Technical Papers 2011-01-0807
2011-04-12

An Examination of Snapshot Data in Caterpillar Electronic Control Modules 2011-01-0807

It has been recognized that Event Data Recorder (EDR) technology incorporated into the Electronic Control Modules (ECMs) of on-highway heavy truck engines can be a benefit to motor vehicle collision investigation and reconstruction [1,2,3,4,5,6,7]. Such beneficial features include the snapshots recorded by many Caterpillar engines. These snapshots, which are triggered by engine faults, operator input, or by what is called a “Quick Stop,” record engine operation and parameters surrounding the event. Past research has reported that while snapshot data are accurate, the documented event time may be off by 24 hours in some ECMs, notwithstanding the module's clock settings being correct [7]. Furthermore, other research has suggested that some modules may report the time interval between data points at approximately two times the actual duration [6]. In these cases, without a formal detailed study of snapshot records, the validity of the data may be brought into question should a snapshot be shown to have occurred on a different date, or should the timing of data be off.
This study performed a detailed examination of the data recorded by Caterpillar snapshots. In particular, the research identified known issues, as well as several previously unknown anomalies that can occur with different Caterpillar ECM types. Beyond documenting snapshot data, the authors also explored whether or not multiple snapshot records can be recorded at the same time, or, when this is not possible, how much time is needed between events for multiple electronic files to be written.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
We also recommend:
JOURNAL ARTICLE

Data Extraction Methods and their Effects on the Retention of Event Data Contained in the Electronic Control Modules of Detroit Diesel and Mercedes-Benz Engines

2011-01-0808

View Details

TECHNICAL PAPER

Simulating the Effect of Collision-Related Power Loss on the Event Data Recorders of Heavy Trucks

2010-01-1004

View Details

TECHNICAL PAPER

The Application and Reliability of Commercial Vehicle Event Data Recorders for Accident Investigation and Analysis

2005-01-1177

View Details

X