16-08-2014, 02:44 PM
Every automotive suspension has two goals: passenger comfort and vehicle control. Comfort is provided by isolating the vehicle\'s passengers from road disturbances. Control is achieved by keeping the car body from rolling and pitching excessively, and maintaining good contact between the tire and the road. Unfortunately, these goals are in conflict. In a luxury sedan the suspension is usually designed with an emphasis on comfort, but the result is a vehicle that rolls and pitches while driving and during turning and braking. In sports cars, where the emphasis is on control, the suspension is designed to reduce roll and pitch. For this we are design this electromagnetic (EM) shock absorber.
Every automotive suspension has two goals: passenger comfort and vehicle control. Comfort is provided by isolating the vehicle’s passengers from road disturbances. Control is achieved by keeping the car body from rolling and pitching excessively, and maintaining good contact between the tire and the road. Unfortunately, these goals are in conflict. In a luxury sedan the suspension is usually designed with an emphasis on comfort, but the result is a vehicle that rolls and pitches while driving and during turning and braking. In sports cars, where the emphasis is on control, the suspension is designed to reduce roll and pitch. For this we are design this electromagnetic (EM) shock absorber.
In this damper as the coil assembly moves, the fluid in the direction of travel is pressurized, and flows through the orifice, where it can be activated by the electromagnetic coils. Increasing field strength produces stronger MR particle chains between the two poles of the field, creating a higher resistance to the flow of the MR fluid through the orifice section of the piston. This resistance provides the proper dissipation of force and damps the vibrations properly. During this the accumulator balance the volume of fluid in cylinder (i.e. above the piston & below the piston)
In this EM shock absorber we are use magneto-rheological fluid. The magneto-rheological fluid like electrorheological fluid is a king smart material whose rheological properties may be rapidly varied by the application of a magnetic field. This material typically consists of micron-sized ferrous particles dispersed in a fluid or an elastomer. When the MR fluid is exposed to a magnetic field, the liquid state may be changed to semi-liquid or extremely to a solid state. When the magnetic field is removed, the state may recover to liquid. The speed of rheology is an order of millisecond.