Vibration Reduction Suspension (VRS) 2000 furnishes smooth ride via damper system
The VRS 2000 is a vehicle seat air suspension that utilizes semi-active damper technology and a low natural frequency (LNF) air spring system to provide superior vibration isolation during normal vehicle operation while maintaining excellent ride control during rough terrain inputs. A specially tuned Motion Master® semi-active damper system, developed by Lord Corporation for the VRS 2000 seat, allows for continuous realtime automatic damping force adjustments based on terrain inputs. The LNF air spring system further enhances the seat ride by providing a lower resonant frequency and improved isolation at critical vehicle vibration frequencies. The Motion Master® damper utilizes a magnetorheological (MR) fluid that changes apparent viscosity when exposed to a magnetic field. By varying the strength of the magnetic field around the damper piston orifice, the viscosity of the MR fluid can be changed from that of a light oil to a heavy paste. The controller continuously monitors the motion of the suspension and updates the damping requirements at the rate of 500 times per second.

Sears Manufacturing Co., Davenport, Iowa, USA; 563-383-2800, www.searsseating.com, www.motion-master.com