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Since 1st March, 1999
 
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Tech talk

• Called Audi Magnetic Ride, this semi-active suspension uses magneto-rheological fluid to provide continuously variable real-time suspension damping control. It responds in real time to road and driving conditions based on input from sensors that monitor vehicle body and wheel motion.

• Audi Magnetic Ride is based on a magneto-rheological principle. When, in a magnetic field, small iron particles in the suspension fluid align themselves in the direction of the magnetic flux. The electromagnetic coil is integrated into the damper piston in such a way that when it is energised, the magnetic flux runs transversely to the admission ports in the damper piston. As the piston moves, the aligned iron particles cling together and create flow resistance in the flowing suspension fluid.

• The greater the energy applied and the stronger the magnetic field, the attractive force between the iron particles will be more, thereby creating greater resistance and stiffer damping. The energy is controlled in relation to the way the car is being driven and the road surface. This means optimal damping power is available for every situation. This damping power produces a more comfortable feel or sportier vehicle handling.

• The control of these dampers is done by an electronic controller that communicates with the vehicle’s sensors and other chassis controllers in order to determine the driving situation in a matter of milliseconds.

• Audi uses the magneto-rheological dampers for both comfort and sport. In its basic mode, the suspension allows for a more comfortable ride. In sport mode, the vehicle offers a more responsive ride thanks to the dampers which stiffen at the push of a button.

• Because of the greater emphasis on ride comfort in the basic mode, maximum comfort is assured when driving over long distances or on uneven surfaces.

• The greater emphasis on precise and responsive handling in the sport mode results in even better control at the limit. It also suppresses body roll in corners. This means that the new Audi R8 with Magnetic Ride has a supple ride without compromising on its handling capabilities.

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