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Active Yaw Control System

Fig 1: Active Yaw Control System
GLL106615Courtesy of VOLVO CARS CORPORATION

The brake control module (BCM) with DSTC (dynamic stability and traction control) uses continuous information from the different sensors in the system to calculate the positions of the steering wheel and car. The brake control module (BCM) calculates the driving manner of the driver by measuring the steering wheel angle, the engine torque, the speed of the car and brake pressure. The brake control module (BCM) 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 Function also activates the power brake booster and the individual brake control to control the hydraulic modulator separation valves and electronic shuttle valves and the inlet and outlet valves which correct the car in the event of a skid.