Audi A8 Fully Active Electromechanical Suspension Powered By 48V System

The new Audi A8 will feature a fully active, electromechanical suspension system which drives each wheel individually and adapts to the prevailing road conditions. Each wheel has an electric motor which is powered by the A8’s 48-volt electrical system—used for the first time as the main electrical system. (The Audi SQ7 TDI introduced in 2016 offered a 48V subsystem as well as a 12V system for the alternator. . The new A8 also features a 48V mild hybrid capability (mHEV).)

Additional components include gears, a rotary tube together with internal titanium torsion bar and a lever which exerts up to 1,100 Nm (811.3 lb-ft) on the suspension via a coupling rod. The new Audi A8 makes its world debut at the Audi Summit in Barcelona on July 11.

Active suspension – electro mechanical rear axle steering

Using its front camera, the A8 detects bumps in the road early on and predictively adjusts the active suspension. Even before the car reaches a bump in the road, the preview function developed by Audi transmits the right amount of travel to the actuators and actively controls the suspension. In this way the suspension reacts precisely at the right time, virtually completely eliminating any vibrations and jolts. This complex process takes just a few milliseconds, with the camera generating information about the road surface condition 18 times a second. The electronic chassis platform (ECP) processes the road surface information and precisely controls all suspension components almost in real time.

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