Influence of damping coefficient into engine rubber mounting system on vehicle ride comfort

Abstract

This study presents a method to improve vehicle ride comfort using additional damping coefficient values for an internal combustion engine (ICE) rubber mounting system. To analyze the effect of the adding damping coefficient values into the rubber mounting system on vehicle ride comfort, a full-vehicle vibration model with 10 degrees of freedom is established under the combination of road surface roughness and ICE excitations. The damping coefficient values are added into ICE rubber mounting system which are respectively analyzed and evaluated according to the international standard ISO 2631-1 (1997). The study results do not only evaluate the influence of the adding damping coefficients on vehicle ride comfort but also suggest the optimal design solution for ICE mounting system to improve vehicle ride comfort.

A multi-objective optimization method based on NSGA-II algorithm and entropy weighted TOPSIS for fuzzy active seat suspension of articulated truck semi-trailer

“…Road stimulation is considered a random profile according to the ISO 8606 standard ( Z 01 , … , Z 06 ) and applied to tyres. 34 The controlled force ( u s ) is located between the cabin and seat to reduce vibrations. The values of the parameters used for the truck are given in Table 1.…”

“…where, the spatial frequency range, n 1 < n < n 2 , is divided into several uniform intervals which have a width of Δ n k ; G q ( n ) is PSD function (m3/cycle/m) for the road surface elevation, the power density G q ( n ) in every small interval is substituted by G q ( n mid − k ) , where ( n mid − k ) ( k = 1, 2,…, n ) is the centre frequency among its intervals; n k is the wave number (cycle/m); ϕ k is the random phase uniformly distributed from 0 to 2 π . 34 Figure 4 presents a random road profile diagram for the six wheels inputs.…”

“…, Z 06 ) and applied to tyres. 34 The controlled force (u s ) is located between the cabin and seat to reduce vibrations. The values of the parameters used for the truck are given in Table 1.…”

“…Input vibrations of the road are considered a random profile. 34 Here, considering the changes of effective parameters in the truck, including trailer load and location, tyres’ stiffness and the driver’s mass, along with the adjustable FLC parameters, it is possible to investigate the effect of these parameters on the objective functions. Monte Carlo sensitivity analysis has been used for this purpose.…”