JPS61186681U

JPS61186681U -

Info

Publication number: JPS61186681U
Application number: JP7086685U
Authority: JP
Priority date: 1985-05-14
Filing date: 1985-05-14
Publication date: 1986-11-20

Description

[Brief explanation of drawings]

第１図は本考案の実施例の全体構成図、第２図
はハンドル復元トルクを作用させるための制御フ
ローチヤート、第３図は前輪荷重が所定値未満の
場合に選択される制御ゲインｋ_１の特性図、第４
図は前後輪荷重比Ｗｆ／Ｗｒが所定値未満の場合
に選択される制御ゲインｋ_２の制御ゲイン特性図
、第５図は本考案の第２の実施例の全体構成図で
ある。２……ハンドル、４……操舵軸、７……前輪、
８……パワシリンダ、１０……パワピストン、１
４Ａ……制御バルブ、１４Ｂ……方向切換弁、１
８……絞り機構、１８Ａ……オリフイス、１８Ｂ
……弁体、２２……電磁ソレノイド、３２……車
速センサ、３４……舵角センサ、３６……前輪荷
重センサ、３８……後輪荷重センサ、４０……制
御部。 Fig. 1 is an overall configuration diagram of an embodiment of the present invention, Fig. 2 is a control flowchart for applying the steering wheel restoring torque, and Fig. 3 is a control gain k ₁ selected when the front wheel load is less than a predetermined value. Characteristic diagram, 4th
The figure is a control gain characteristic diagram of the control gain _k2 selected when the front and rear wheel load ratio Wf/Wr is less than a predetermined value, and FIG. 5 is an overall configuration diagram of a second embodiment of the present invention. 2... Handle, 4... Steering shaft, 7... Front wheel,
8...Power cylinder, 10...Power piston, 1
4A... Control valve, 14B... Directional switching valve, 1
8... Throttle mechanism, 18A... Orifice, 18B
... Valve body, 22 ... Electromagnetic solenoid, 32 ... Vehicle speed sensor, 34 ... Rudder angle sensor, 36 ... Front wheel load sensor, 38 ... Rear wheel load sensor, 40 ... Control unit.

Claims

[Scope of utility model registration request]

It is installed in a bypass passage that bypasses both cylinder chambers defined by a power cylinder that generates front wheel steering assist force by supplying and discharging pressure fluid, and a power piston. a throttle mechanism that adjusts the differential pressure in the room; a directional switching valve that switches the direction of pressure fluid supply and discharge to the power cylinder at a predetermined speed or higher;
and when the vehicle speed is above a certain value and the front wheel load or the front and rear wheel load ratio is below a certain value, the directional control valve and the throttle mechanism are provided to apply a steering assist force to the power cylinder. A power steering device characterized by applying pressure fluid to provide a resistance force in the opposite direction.