METHOD OF CHECKING CONDITION OF VEHICLE DAMPING DEVICES Russian patent published in 2006 - IPC G01M17/04 

FIELD: transport engineering; testing facilities.

SUBSTANCE: invention can be used to reveal troubles in road vehicle suspension systems. According to proposed method acceleration pickups are mounted on sprung and unsprung mass of read vehicle. Oscillations are excited at frequency "f" close to or equal to high-frequency resonance of wheels. Simultaneously values of accelerations of sprung mass z" and unspring mass ξ" during test time "t" are measured and recorded for each of four vehicle damping devices. Then averaged value of ratios of accelerations И_av=∑(|z"|)/∑(|ξ"|) of sprung mass z" and unspring mass ξ" during time "t" of test are calculated. Basing of aperiodicity factor ψ, condition of damping device of road vehicle suspension is evaluated. Standard dependence of ψ_st from И_st=z"/ξ" is preliminarily found by calculation or experimentaly, and И_av=∑(|z"|)/∑(|ξ"|) at high frequency resonance is compared with said dependence and ψ is determined whose values should be within 0.25 and 0.5, if damping device is in good state.

EFFECT: improved accuracy of checking of shock absorber.

5 dwg