Abstract
Abstract
VZN shock absorber is much better than standard ones because this self-adjustable shock absorber confers possibilities of stepwise adjustment of damping force as function of the instantaneous piston position. That means damping coefficients for a well correspondence between comfort and adherence, in the medium area. High damping coefficients both adjacent parts at the medium area for better adherence and well axle movement brake, and very high damping coefficients at the ends, for better body and axles protection.
For example, for Dacia 1310, a Romanian car, for rear shock absorbers on compression different adjusting, in the position without weight (
The simulation tests were realized on a two degrees model, using Matlab/Simulink. They show a better body stability-skyhook comportment, better protection at the stroke ends and lower RMS body acceleration.
The paper presents the new, specific plate filling valves and organization solutions for selfadjustable shock absorber, called shortly VZN, and simulation results, relative to standard one. It realizes a semi intelligent suspension at the price of a standard suspension.c= 333.3 kg/m), and in full weight position (c=666.7 kg/m), it confers the same vertical accelerations at the same velocity excitation signal (v=1.5m/s). On the contrary a standard shock absorber confers a vertical acceleration 100 % increased at the same excitation, in situation without weight.Keywords: adjustable shock absorber, damping coefficient, skyhook, vertical acceleration, adherence.