Audi magnetic ride - high-tech damping

Audi magnetic ride is the name of the optional damping technology that resolves the age-old conflict between comfort and driving dynamics without countenancing any of the otherwise unavoidable compromises. As a continuously adaptive system, it adapts the damping characteristic to the profile of the road and the driver's gear-shifting habits within just a few milliseconds. None of the TT's competitors has such an efficient high-tech solution to offer. Audi magnetic ride is available as an option for both engine versions.

The shock absorber pistons on the TT do not contain conventional oil, but a magneto-rheological fluid - a synthetic hydrocarbon oil in which microscopically small magnetic particles measuring between three and ten microns are enclosed.

When a voltage is applied to a coil - by means of a pulse delivered by a control unit - a magnetic field is created in which the alignment of the particles changes. They position themselves transversely to the direction of flow of the oil, and so inhibit its flow through the piston channels. This alters the characteristic of the damping characteristic much faster than is the case in conventional adaptive dampers.
Two programs: comfortable or crisp

Audi magnetic ride provides the right degree of damping force at each individual wheel in every situation. The control unit, supplied by complex sensing technology, constantly analyses the situation. Starting from the "Normal" setting, the driver can also activate the "Sport" mode via a button on the centre console. These two programs establish clearly distinctive characteristics.

In the basic mode - when the oil is more viscous and the degree of damping less pronounced - the TT rolls surprisingly smoothly; this is ideal for long-distance driving or uneven road surfaces. In the Sport mode, by contrast - when the oil is less viscous - it reveals an extremely dynamic character that is manifested by a resolutely firm grip of the road surface. Rolling movements are suppressed from the very moment the steering is turned even more effectively than in the basic suspension setting, and the steering response is further improved. The self-steering behaviour is further optimised by the specific stabilisation provided for each individual wheel, resulting in a driving feel reminiscent of a go-kart.


Rumor has it, this is Delphi's MagneRide™

<img src="http://www.sae.org/automag/techbriefs/10-2001/02.gif">



<img src="http://www.sae.org/automag/techbriefs/10-2001/03.gif">

furthermore, Delphi announced that Ferrari is also a customer, using the Magneride on the new 599. The software, of course was modified by Ferrari, for use in its new sports car. I imagine that Audi has performed similar modifications to the software and is utilizing only the basic technology and components since, as far as I know, GM does not utilize the Bosch CAN system in any domestic product.

-J

the mix is very haphazard. Some of the technology employed by GM is ancient-live axles and pushrod engines-and should be discarded. GM's and Ford's problems are not tractable, most resulting from the failures of organizational design. Completely new management, if it was possible, could potentially help both companies. However, that being said, there are actually some really good technologies developed within both companies and this is but one example. I recall the original research started at the University of Michigan in the mid 80's; one of my grad professors was very active in working with GM on this technology.

-J

The Audi rep said that you push this button to firm up the suspension. The button was just below the shifter in that little section of buttons.

-Ryan E.