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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.

This paper discusses one method for reducing heavy-duty truck rollover accidents, the Freightliner/MeritorWABCO Roll Advisor and Control (RA&C) System. It describes the operation of this system and the unique way in which RA&C trains drivers to avoid high-risk rollover and braking conditions. In addition, the rationale for this approach is discussed in terms of Behavioral Based Safety (BBS), and the means employed to communicate with drivers is described. A technical description of the RA&C system is presented including a discussion of the challenges of designing and developing this product to be a cost-effective system readily implemented in today's commercial vehicles. Resolution of these challenges leads to the choice of the ABS platform to house and operate the necessary electronics and software along with the Freightliner Driver Message Center for displaying driver information.