Page 407 - Automotive Engineering Powertrain Chassis System and Vehicle Body

CHAP TER 1 3. 1 Vehicle motion control

Fig. 13.1-20 Adjustable shock absorber.

13.1.5.1 Variable damping via variable fluid (MR). An electromagnet is positioned such that
strut fluid viscosity a magnetic field is created whose strength is proportional
to current through the coil. This magnetic field passes
Variable suspension damping is also achieved with a fixed through the MR fluid. In the absence of the magnetic
aperture and variable fluid viscosity. The fluid for such field, the iron particles are randomly distributed and the
a system consists of a synthetic hydrocarbon with MR fluid has relatively low viscosity corresponding to low
suspended iron particles and is called a magneto-rheological damping. As the magnetic field is increased from zero, the

Fig. 13.1-21 Force versus relative velocity of a solenoid-switched aperture shock absorber.

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