Operation

The regulating electronics for the traction control system are housed together with the ABS regulating electronics in one control module. Both systems share many of the inputs for their processing and some of the output control of the hydraulic unit. Both systems use redundant processors for plausibility checking and safety reasons.

The traction control system has evolved, over the years, with expanded control functions that enable it to ensure that traction and stability are maintained.

The traction control module receives inputs from the four wheel speed sensors and various other inputs for its processing function. Based on these inputs, the module will activate one or more control functions designed to reduce the engine's output torque or brake the wheels to restore traction or stability.

The traction control module interfaces with other driving management systems and the brake hydraulic unit to carry out its control functions. The systems interfaced with the traction control system for regulation include:

^ The EML system for throttle regulation - V12 engine.
^ The auxiliary throttle valve for throttle regulation - 4, 6 and 8 cylinders.
^ The Engine management system for engine intervention and throttle control.
^ The brake hydraulic unit for wheel braking control.
^ The transmission control module for gear shift intervention.

The sequence for activation of the various control functions is based on the programming of the traction control module and vehicle speed. One or all of the regulating functions can be used together to restore traction or stability.