While fully active suspension systems like the aforementioned Active Body Control are great, their complexity and cost can be prohibitive. That’s why General Motors and Delphi worked to develop magnetorheological shock absorbers, which use magnetic fields to alter suspension firmness based on computer inputs. The system was launched on the 2002 Cadillac Seville STS, and was later offered on the Chevrolet Corvette and Cadillac XLR, as well as countless other General Motors vehicles.
“Total system response is less than fifteen milliseconds, which means the computer can specify one level of damping as the wheel moves up and over a bump and a markedly different setting for the ride down. At 60 mph, damping can be changed at all four wheels every foot of travel.” — DS