Abstract
Keywords: self-adjustable shock absorber, metering hole, skyhook, lift, squat, dive, pick, roll, roll damping coefficient, anti-gyration effect, redressing effect.
The self-adjustable shock absorber is called VZN, this acronym being abbreviation for VARIABLE ZETA NECESSARY for well NAVIGATION, where ZETA represents the relative damping, which is stepwise changed automatically, according to the piston position.
The smart shock absorber VZN, realized without electronics or mechanisms, grant with European Patent EP 1190184 B1, and Romanian Patent 118546 B1, gives the general organization solution, without practical solution for specific elements, like valves, sealing and guiding elements.
For cost and technology reasons, a new request of patent, presenting specific solutions for planar and cylindrical filling valves, sealing-guiding elements and alignment of cinematic elements was done, some of this elements being presented in the papers [1], [2].
The VZN dynamic shock absorber model was theoretically optimised, considering the piston position on full load and unload and for end stroke movement very high breaking [5]. Simulations were made for three harmonic signals, considered representatives for the real hard road conditions, at full load and unload situation, and at 100% and 50% shock absorber damping efficiency. The results show high performances for VZN shock absorbers, relative to standard one, its great adaptive capacity relative to load, road condition, even at low hydraulic efficiency.