JPS5912763U

JPS5912763U - power steering device

Info

Publication number: JPS5912763U
Application number: JP10697182U
Authority: JP
Inventors: 元小塚
Original assignee: 三菱自動車工業株式会社
Priority date: 1982-07-16
Filing date: 1982-07-16
Publication date: 1984-01-26

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本案に係るパワーステアリング装置の一実施例
を示す油圧回路図、第２図は油路開閉弁の一実施例を示
す縦断側面図、第３図は同油路開閉弁の他の実施例を示
す縦断側面図、第４図は圧　　　　　”力制御弁の一実
施例を示す縦断側面図、第５図は同圧力制御弁の他の実
施例を示す縦断側面図、第　　−６図は同圧力制御弁の
さらに他の実施例を示す縦断側面図、第７図はオイルポ
ンプの吐出流量特性を示す説明図、第８図はオリフィス
の上流圧を示す説明図、第９図は圧力制御弁のチャンバ
ー（出入口側圧力室）の圧力を示す説明図、第１０図は
圧カー人カトルク特性を示す説明図である。１ａ・・・エンジン、１ｂ・・・オイルポンプ、２・・
・油路切換弁、３・・・パワーシリンダ、４・・・タン
ク、５゜５′・・・反力ビストン、７・・・オリフィス
、８・・・高圧油路、８′・・・分岐油路、９・・・低
圧油路、１０・・・油路開閉弁、１１・・・圧力制御弁
、１８ａ、１８ｂ・・・出入口側圧力室、１８Ｃ・・・
一方の圧力室、１８ｄ・・・他方の圧力室、１９・・・
油孔。９−１「１．１− ＝＝二二「−一一一７６′ １電］−Fig. 1 is a hydraulic circuit diagram showing an embodiment of the power steering device according to the present invention, Fig. 2 is a longitudinal side view showing an embodiment of the oil passage opening/closing valve, and Fig. 3 is a hydraulic circuit diagram showing an embodiment of the oil passage opening/closing valve. FIG. 4 is a longitudinal side view showing an embodiment of the pressure control valve; FIG. 5 is a longitudinal side view showing another embodiment of the pressure control valve; FIG. is a longitudinal side view showing still another embodiment of the same pressure control valve, FIG. 7 is an explanatory diagram showing the discharge flow rate characteristics of the oil pump, FIG. 8 is an explanatory diagram showing the upstream pressure of the orifice, and FIG. 9 is an explanatory diagram showing the pressure Fig. 10 is an explanatory diagram showing the pressure in the chamber (inlet/outlet side pressure chamber) of the control valve, and Fig. 10 is an explanatory diagram showing the pressure torque characteristics.
・Oil passage switching valve, 3... Power cylinder, 4... Tank, 5゜5'... Reaction force piston, 7... Orifice, 8... High pressure oil passage, 8'... Branch Oil passage, 9...Low pressure oil passage, 10...Oil passage opening/closing valve, 11...Pressure control valve, 18a, 18b...Inlet/outlet side pressure chamber, 18C...
One pressure chamber, 18d...The other pressure chamber, 19...
oil hole. 9-1 "1.1- ==22"-11176' 1 electric]-

Claims

[Scope of utility model registration request]

In a power steering device that conducts steering operation by guiding hydraulic oil discharged from an oil pump driven by an engine to a power cylinder via an oil passage switching valve, a high-pressure oil passage connects the oil pump and the oil passage switching valve. an oil passage opening/closing valve that opens when the vehicle is running at a certain speed or higher, in the middle of a branch oil passage extending from the oil passage switching valve to the reaction force pistons on both sides of the oil passage switching valve;
A pressure control valve is interposed to maintain the pressure of the hydraulic oil toward the reaction force piston at a substantially constant pressure, and an orifice is interposed in the middle of a low-pressure oil passage connecting the oil passage switching valve and the tank, The pressure chamber on the inlet and outlet side of the pressure control valve is connected to the tank side low pressure oil passage downstream of the orifice through a small hole provided in the spool and one pressure chamber, and the other pressure chamber of the pressure control valve is connected to the low pressure oil passage upstream of the orifice. A power steering device characterized in that each of the power steering devices is connected to a low pressure oil passage on the side of an oil passage switching valve.