June 14, 2017

Posted by: Team_FF

Testing the FF 91: Dynamic Vehicle Control

Dynamic, intelligent, and connected. We’re designing and engineering the FF 91 to recalibrate your expectation of automotive performance.

Intelligent integration of four-wheel steering, precision torque vectoring, and semi-active damping will push the industry to a new standard. It’s why the FF 91 user will enjoy an ideal balance from both a driver and passenger standpoint: the smooth, plush ride of a premium luxury vehicle, sporty handling and agility, and the safety that comes with highly advanced dynamic vehicle control. As FF engineers work continuously and tirelessly to develop our technology further, we can expect an even more rewarding driving experience down the road.

We’re crafting our flagship vehicle to perform with precision in any type of situation. Watch as Sr. Manager of Systems Integration, Matt Lubbers, takes us behind the scenes for the first in our series of “Testing the FF 91” at the test track in Crows Landing, CA.

Can you steer through a corner faster and more assuredly with the help of the rear wheels?

That’s where four-wheel steering adds an extra degree of confidence: reducing steering load whenever possible and maximizing performance. Four-wheel steering is a feature usually reserved for top sports cars, adding a significant difference in the way that the FF 91 redefines control. By continually tracking vehicle response, this intelligent, closed-loop system can quickly compensate for instability faster and more accurately than most drivers can.

When you need to make a tight turn in a low-speed situation (like a parking lot), rear steering on the FF 91 tilts out of phase – think of it as the front wheels turning inward, while the rear wheels turn outward, tightening the turning circle. Having this capability is key to making the FF 91 fit into tight spots with dexterity. At high speeds, the wheels turn in phase for additional stability. Four-wheel steering on the FF 91 takes multiple factors into account, including yaw rate, road surfaces, and individual driving styles.

A typical drive might not include cones and pylons, but the FF 91 is being developed to be prepared for the unexpected. To ensure that the FF 91 can maneuver nimbly, our engineers insisted on employing electric torque vectoring. Rather than a brake-based system or an electronic differential, the FF 91 utilizes two independent rear motors (and a centrally located front motor) to control stability with an instantaneous response. This dynamic distribution of torque to each wheel provides ideal traction and handling capability. This is one more way that the FF 91 creates a controlled user experience with minimal intrusion. The result is a higher level of precision, without sacrificing speed or being disruptive to the driver. The motor control itself, is roughly 10 times quicker than conventional systems and delivers fully independent torque to each rear wheel.

The FF 91 also features semi-active dampers that react in real time to adjustments in road surfaces, providing improved ride handling and comfort. These dampers continuously monitor throttle, steering, and braking inputs, as well as vertical body movement. This collection of information allows for adaptive and precise damper control to achieve the desired weight transfer.

Individually, these industry-leading technologies elevate the FF 91 to an elite echelon of road cars. Working together, they offer possibilities for customization, based on the way you want to experience the FF 91 in the moment. It’s a synchronous and effortless approach to a personalized user experience.

How do we achieve this level of seamless vehicle responsiveness? The FF 91’s Dynamic Vehicle Control (DVC) system intelligently integrates torque vectoring, four-wheel steering, and semi-active damping into a unified command. This controller monitors driver inputs in comparison to how the vehicle is behaving and makes adjustments to torque distribution, rear steering angle, and suspension control, accordingly.

Check back here for the next chapter of Testing the FF 91 and click here for the full video.