In contemporary vehicle design, electronic control systems play a crucial role in various functions. Many luxury car models are now outfitted with more than 70 electronic control units (ECUs) that manage everything from safety features to stability control and moonroof operations. However, not all of these systems are only aimed at basic functionality. Over the last ten years, Mazda’s engineering team has been developing different versions of “GVC” (G-Vectoring Control).
After testing the latest Mazda CX-5 and Mazda 3 equipped with GVC, it was initially difficult to discern the system’s effects. However, by studying how GVC operates, I was able to conduct further tests in snowy conditions. My observations led me to describe GVC as a “torque reduction system.” The vehicle’s ECU works to lower the engine’s torque output to shift a small portion of weight onto the front wheels during cornering. This action reduces the G-load experienced by passengers and helps the vehicle stay on its intended path. Although this torque adjustment by the ECU is often imperceptible to most drivers, it does alter the effort required for steering. GVC is designed to be so intuitive that it minimizes the need for small steering corrections in the midst of a turn, resulting in a smoother driving experience.
The intention behind GVC was to enhance driver confidence by understanding human behavior. Mazda sought to strengthen the driver’s sense of control, thereby deepening the bond between the owner and the car. The final implementation focused on optimizing engine control and adjusting power output characteristics, which necessitated subtle modifications to the suspension for overall performance enhancement. Notably, GVC is integrated into the engine’s programming and cannot be deactivated.
GVC optimizes tire performance by concentrating on the vertical load applied to the tires. As soon as the driver begins to turn the steering wheel, GVC modulates engine torque to create a deceleration G-force, thereby shifting weight to the front wheels. This enhances the grip of the front tires, improving the vehicle’s responsiveness during turns. Once the driver maintains a steady steering angle, GVC quickly restores engine torque, transferring weight back to the rear wheels to bolster stability. This dynamic load transfer significantly enhances grip from both the front and rear tires, resulting in improved vehicle responsiveness and stability aligned with the driver’s intentions..
