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Heavy Truck Stability with a Trailing Axle Tire Blowout

Journal Article
ISSN: 1946-391X, e-ISSN: 1946-3928
Published April 16, 2012 by SAE International in United States
Heavy Truck Stability with a Trailing Axle Tire Blowout
Citation: Larson, R. and Cuadrado, J., "Heavy Truck Stability with a Trailing Axle Tire Blowout," SAE Int. J. Commer. Veh. 5(1):101-110, 2012,
Language: English


Trailing axles, otherwise known as tag axles, are utilized in many states to allow heavy duty dump trucks and cement trucks to maximize their capacity. The trailing axle is an additional axle mounted on an arm on the rear of the truck that can be raised and lowered. When lowered, the axle extends the overall wheelbase of the vehicle and increases the total number of axles, thereby allowing for additional load to be carried without exceeding load-restriction regulations.
There are multiple manufactures of trailing axles that utilize different suspension designs. One design uses an articulating axle that is mounted to the framework that lowers it. In this study, the sensitivity of this design to tire blowout on one of the trailing axle tires is studied. Testing was conducted that involved initiating a sudden air-loss event by creating a hole in the sidewall of the tire. The handling response of the vehicle was documented with on-board instrumentation and on-board and off-board video.