Ruhl Forensic Leader in Forensic Technology

Publications

Technical Papers


SAE 2003-01-3393
Numerical Methods for Evaluating ECM Data in Accident Reconstruction and Vehicle Dynamics

Roland L. Ruhl, C. Adam Senalik, and Ericka J. Southcombe

Information stored in the electronic control modules (ECM) of modern class 8 tractors is a valuable tool to accident reconstruction but must be properly interpreted. The stored ECM speed data is driveshaft speed. To determine the road speed, the investigator must determine if braking occurred. The level of braking can be estimated from the data; computation of the road speed from the driveshaft speed can by performed by estimating the tire slip. Failure to determine the road speed can result in substantial error in velocity and travel distance estimates. Using realistic models it is shown that proper numerical integration techniques will produce negligible error in highway speed braking distances.

Copyright 2003 Society of Automotive Engineers

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Technical Papers

SAE 2013-01-0785
The Accuracy of Pedestrians in Estimating the Speed of a Moving Vehicle

SAE 2010-01-0046
Observed Errors in Distance Estimation

SAE 2007-01-0758
The Experimental Study of the Air Flow Produced by Road Vehicles and its Potential Destabilizing Effect on Nearby Pedestrians

SAE 2006-01-3557
Usable Models for Free and Forced Cooling of Commercial Vehicle Drum Brakes

SAE 2006-01-3556
Comparison of Established Heavy Brake Heating / Cooling Models with HVE Brake Designer in a Real Mountain Accident

RF2005-01
Commercial Vehicle Onboard Electronics - Global Positioning Systems, Engine Control Modules and Safety Systems and Devices

IMECE2004-59566
Analysis of a Common Cause Hypothesis in a Forensic Product Defect Analysis

SAE 2004-01-2717
Safety Concerns in Automatic Control of Heavy-Duty Articulated Vehicles

SAE 2003-01-3393
Numerical Methods for Evaluating ECM Data in Accident Reconstruction and Vehicle Dynamics

SAE 2003-01-3363
Development of a Dynamic Model of an Air-ride Seat for On-highway Trucks

SAE 2003-01-3419
Simulation of Intelligent Convoy with Autonomous Articulated Commercial Vehicles

SAE 2002-01-3104
Factors Affecting the Friction Coefficients Between Wooden and Plastic Pallets and the Wooden Floor Of A Van-type Semi-trailer

SAE 2002-01-1566
Overview of Carat-4, a Multi-body Simulation and Collision Modeling Program

SAE 2001-01-2755
Factors Affecting the Friction Coefficients Between Wooden Pallets and the Wooden Floor of a Van-type Semi-trailer

SAE 2000-01-3476
Fluid Load Analysis Within the Static Roll Model

RF2000-01
The Post-Kumho Exclusion of a Traffic Accident Reconstruction Expert

SAE 1999-01-3782
A Prototype Computer Based Test System to Test Commercial Vehicle Air Brake Systems: Application and Test Results

SAE 1999-01-3732
Dynamics and Roll Stability of a Loaded Class 8 Tractor-Livestock Semi-Trailer

SAE 973261
Prediction of Steady State Roll Threshold for Loaded Flat Bed Trailers - Theory and Calculation

SAE 971033
Ventilated Brake Rotor Air Flow Investigation

SAE 900106
Skidmark Signatures of ABS-Equipped Passenger Cars

SAE 880066
Combining Scene Data with Trajectory Information for Effective Accident Simulation