JPH0233109U

JPH0233109U -

Info

Publication number: JPH0233109U
Application number: JP11193288U
Authority: JP
Priority date: 1988-08-26
Filing date: 1988-08-26
Publication date: 1990-03-01

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す断面図、第２
図はこの実施例の能動型サスペンシヨンの概略を
示す構成図、第３図は圧力制御弁の励磁電流Ｉｓ
に対する制御圧Ｐｃの静特性を示したグラフ、第
４図はこの実施例の能動型サスペンシヨンにおけ
る路面からの加振周波数に対する減衰定数の特性
を示したグラフである。１０……能動型サスペンシヨン、１４……車輪
側部材（バネ下）、１６……車体側部材（バネ上
）、２２……圧力制御弁、２２Ｂ……比例ソレノ
イド、２２Ｃ……可変絞り、２４……油圧シリン
ダ（流体圧シリンダ）、４２……弁ハウジング、
４４……挿通孔、４６……隔壁、４８……ポペツ
ト、５０……固定絞り、５２……メインスプール
、５２ｄ……フイードバツク通路、５４ｃ……出
力ポート、５４ｓ……供給ポート、５４ｒ……戻
りポート、７０，７６……通路、７１……スプー
ル、７２……連通路、７３……オリフイス、７５
……スプリング、ＰＰ……パイロツト供給通路、
ＰＴ……パイロツト戻り通路、ＰＲ……パイロツ
ト室、ＦＵ……パイロツト側圧力制御室、ＦＬ…
…出力側圧力制御室、ＧＵ，ＧＬ……圧力室。 Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a schematic configuration diagram of the active suspension of this embodiment, and Figure 3 shows the excitation current Is of the pressure control valve.
FIG. 4 is a graph showing the characteristics of the damping constant with respect to the excitation frequency from the road surface in the active suspension of this embodiment. 10...Active suspension, 14...Wheel side member (unsprung), 16...Vehicle body side member (spring), 22...Pressure control valve, 22B...Proportional solenoid, 22C...Variable throttle, 24 ... Hydraulic cylinder (fluid pressure cylinder), 42 ... Valve housing,
44...Insertion hole, 46...Partition wall, 48...Poppet, 50...Fixed throttle, 52...Main spool, 52d...Feedback passage, 54c...Output port, 54s...Supply port, 54r...Return Port, 70, 76... passage, 71... spool, 72... communicating passage, 73... orifice, 75
...Spring, PP...Pilot supply passage,
PT...Pilot return passage, PR...Pilot chamber, FU...Pilot side pressure control chamber, FL...
...Output side pressure control chamber, GU, GL...pressure chamber.

Claims

[Claims for Utility Model Registration] (1) A fluid pressure cylinder inserted between a sprung mass and an unsprung mass, and a pressure control valve for controlling the operating pressure of the fluid pressure cylinder; , a spool that can slide through an insertion hole in the valve housing;
An active suspension comprising a pilot pressure that is varied based on changes in the attitude of the vehicle body and a pressure regulating mechanism that reciprocates the spool according to the differential pressure between the output pressure of the pressure control valve. An active suspension characterized in that a variable throttle is provided on the output side to limit the flow rate of the working fluid according to the output pressure of the pressure control valve or the pilot pressure. (2) The active variable throttle valve according to claim 1, wherein the variable throttle exhibits a throttle effect when the output pressure of the pressure control valve or the pilot pressure is near a limit value of a pressure controllable range of the pressure control valve. type suspension.