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Active Yaw Control System

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Fig 1: Active Yaw Control System
GLL106617Courtesy of VOLVO CARS OF NORTH AMERICA.

The ABS control module with DSTC uses continuous information from the different sensors in the system to calculate the position of the steering wheel and car. The ABS control module calculates the driving manner of the driver by measuring the steering wheel angle, engine torque, speed of the car and brake pressure. The ABS control module also calculates the behavior of the car by monitoring the steering wheel angle, steering wheel angle speed, yaw rate speed and lateral acceleration. When the differences between the movements of the driver and the behavior of the car exceed a certain point, Active Yaw Control limits the engine torque to maintain lateral stability in all driving conditions. Active Yaw Control also activates the power brake booster and the individual brake control to control the hydraulic modulator separation valves and hydraulic shuttle valves and the inlet and outlet valves which correct the car in the event of a skid.