Hydraulic Shock Absorber Using Electrorhelolgical Fluid. Two-Mass System with High-Capacity Absorber.

Abstract

We propose a high-capacity hydraulic shock absorber using electrorheological (ER) fluid having apparent viscosity that can be modified by an electric field. In this report, we determine area of an orifice of the ER shock absorber during impact of a light body (1 250 kg), and characteristics of resisting force of the absorber due to the ER effect during impact of a heavy body (2 250 kg) by extending a method proposed in a previous paper using a constant resisting force of the absorber. Furthermore, we show by simulation that the maximum accelaration of the light body nearly equals that (about 1g) of the heavy body during impact for a two-mass system containing the ER shock absorber, while the maximum acceleration of the former is about 2 times that (about 1g) of the latter during impact for a two-mass system containing an existing shock absorber with a metering pin.