KR970070612A - Damping coefficient control device of semi-active damper - Google Patents

Abstract

The present invention relates to a damping coefficient control apparatus for a damping coefficient control apparatus for a damping coefficient control apparatus which can independently adjust a damping coefficient during tension and compression according to the strength of impact or vibration. The apparatus includes a piston rod Wherein hydraulic pressure control means is provided outside the cylinder for controlling the hydraulic pressure at which the working pressure is changed by the external pressure applied to the piston rod at both ends of the stroke distance outside the piston rod; Wherein the hydraulic control means includes a first flow path tube provided in parallel with an upper tube disposed outside the top dead center of the piston rod and a second flow path tube provided in parallel with a lower tube provided outside the bottom dead center of the piston rod, And a flow control means for regulating a flow rate of the fluid on the pipeline of the first and second flow pipe is provided; The flow rate control means comprises a flow rate control valve for regulating the flow rate of the fluid for absorbing the impact pressure applied to the piston rod and a tension / compression control valve for controlling the tension and compression force according to the damping coefficient determined by the flow rate control valve And a check valve is provided at one side of the first and second flow pipe.

Description

Damping coefficient adjustment device of semi-active damper

Since this is a trivial issue, I did not include the contents of the text.

FIG. 1 is a sectional view showing a conventional semi-active damper, and FIG. 2 is a system diagram showing a hydraulic pressure adjusting means showing a semi-active damper of the present invention.

Claims (6)

A semi-active damper including a piston rod for damping an impact by a fluid filled in a cylinder, characterized in that an oil pressure whose operating pressure is changed by an external pressure applied to the piston rod is adjusted at both ends outside the stroke distance of the piston rod Wherein the hydraulic control means is installed outside the cylinder. The hydraulic control apparatus according to claim 1, wherein the hydraulic control means comprises: a first flow path pipe provided in parallel with an upper pipe disposed outside the top dead center of the piston rod; and a second flow pipe provided in parallel with a lower pipe disposed outside the bottom dead center of the piston rod. Wherein the flow path forming means forms a closed circuit through an accumulator and a flow rate adjusting means for adjusting a flow rate of the fluid on the channels of the first and second flow path pipes is provided. [3] The apparatus according to claim 2, wherein the flow rate regulating means comprises: a flow rate regulating valve for regulating a flow rate of the fluid for absorbing the impact pressure applied to the piston rod; and a tension adjusting means for adjusting a tensile force and a compressive force according to a damping coefficient determined by the flow rate regulating valve / Compression control valve for controlling the damping coefficient of the semi-active damper. The apparatus of claim 3, wherein a check valve is provided on one side of each of the first and second flow pipes. The apparatus of claim 3 or 4, wherein the flow rate control valve and the tension / compression control valve provided in the first and second flow pipe are connected in series. The apparatus of claim 3 or 4, wherein the check valve is connected in parallel to the flow control valve and the tension / compression control valve. ※ Note: It is disclosed by the contents of the first application.