HEAVY TRUCK TRAILER SKIDWEAR AS A FUNCTION OF ABS BRAKE CONFIGURATION
1 online resource (67 pages) : PDF
University of North Carolina at Charlotte
Most commercial heavy-duty truck trailers are equipped with either a two sensor, one modulator (2S1M) or four sensor, two modulator (4S2M) anti-lock braking system (ABS). Previous research has been performed comparing the performance of different ABS modules, in areas such as longitudinal and lateral stability, and stopping distance. This study focuses on relating ABS module type, and wheel speed sensor placement to trailer wheel lock-up and subsequent impact to tire wear for tandem axle trailers with air-ride suspension. Prior to tire wear inspection, functionality of the ABS system was testing using an ABS scan tool communicating with the SAE J560 plug access port on the trailer. Observations were documented on trailers using the 2S1M system with the wheel speed sensor placed on either the front or rear axle of a tandem pair. As a result of wheel lock-up and subsequent flat spotting; the compromised wear pattern propagates throughout the tire rapidly due to high trailer loads. From observed trends in the collected information it has been determined that tire wear from flat spotting due to wheel lock-up tends to occur on the axle opposite of sensor placement. Therefore, it is the recommendation of this study to encourage increased use of anti-lock brake systems with four wheel-speed sensors and two modulators (i.e., 4S2M) be used in applications involving air-ride heavy-duty truck trailers. Such a configuration acts as a defense against skid wear of the trailer tires improving truck and trailer safety while reducing the financial impact from pre-mature tire replacement.
Tkacik, Dr. Peter
Keanini, Dr. RusselHill, Dr. Jerre
Thesis (M.S.)--University of North Carolina at Charlotte, 2017.
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