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Delphi's Semi-Active Suspension System

Delphi Automotive's MagneRide™ Suspension Control System
One of 100 "Best of What's New" Technical Achievements of 1999, November 9, 1999
"MagneRide™ will first appear on passenger vehicles beginning in 2003."
"With MagneRide™, suspension damping is controlled by an on-board computer that signals an electro-magnet in the damper piston to change the flow properties of the magneto-rheological damping fluid and resultant damping forces up to 1,000 times per second. This allows the system to respond rapidly to a wide range of road and driving conditions. These damping forces provide improved vehicle interior isolation and ride smoothness..."

Image of Magneride strut

Delphi's MagneRide™ Technology Earns Equip'Auto Award, October 15, 1999
"Delphi Automotive received the "Grand Prix Internationaux de la Creation Technique" (Grand Prize for New International Technology) for MagneRide™, a continuously variable valveless real-time damping suspension system that uses a magnetically-controlled damping fluid."

Delphi-Developed Magneto-Rheological Fluid Enable Next Level of Variable Damping Performance at 1999 IAA, September 14, 1999 .
"... the applied magnetic field aligns the metal particles into fibrous structures, controlling the fluid's yield stress without affecting its viscosity ..."
"The MR fluid reacts to an external magnetic field in less than 1 millisecond."

Delphi Introduces MagneRide™ Suspension Control Technology at 1999 IAA, September 14, 1999 .
"The MagneRide™ system -- introduced here at the Frankfurt International Motor Show (IAA '99) -- is a high-performance, high-value, semi-active suspension control system that optimizes vehicle ride and handling by providing Continuously Variable Real-Time Damping (CV-RTD) control based on road and driver inputs."