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In 1987, Freightliner Corporation became the first Heavy Duty Truck OEM to introduce ABS in the U.S. This paper looks at the development that lead to this introduction of ABS on Freightliner vehicles. It also examines the perception of ABS in the U.S. market place, and details the steps that were necessary to ensure success. This paper also looks at future trends for ABS in the North American truck market. The many developments and enhancements to the basic ABS, which are possible with advances in digital electronics, are reviewed.

This paper deals with the use of SAE J1922 as a control data link. This application involves a direct data link connection between the ECU of an electronic engine and the ECU for an Antilock Braking System (ABS) with integrated Drive Slip Control-also referred to as Anti-wheel Spin Regulation (ASR), or as Automatic Traction Control (ATC). The application calls for an automatic reduction of engine output torque when the ABS/ATC controller determines excessive wheel spin has occurred. This most often occurs on slippery surfaces such as ice or snow when the vehicle is first started into motion, or on similarly slippery surfaces when accelerating or cornering. The engine torque reduction continues until wheel spin is brought within an acceptable limit. Control of engine output is then returned to the driver. Extensive testing was conducted at WABCO's winter test site in northern Finland. It was necessary to determine tradeoffs on performance as data update rates were altered.