JPH02144876U

JPH02144876U -

Info

Publication number: JPH02144876U
Application number: JP2370089U
Authority: JP
Priority date: 1989-03-01
Filing date: 1989-03-01
Publication date: 1990-12-07

Description

[Brief explanation of drawings]

第１図は本考案の実施例を示す説明図、第２図
は第１図に示した制御回路のブロツク図、第３図
は本考案装置の制御態様を示すフローチヤート、
第４図は舵角減速度に対する切り換わり舵角速度
特性図、第５図は速い操舵時およびゆつくりした
操舵時における舵角速度の変動状況を示す説明図
、第６図イ，ロはそれぞれ本考案装置の速い操舵
時およびゆつくりした操舵時における復元トルク
の変動状況を示す説明図、第７図イ，ロはそれぞ
れ従来装置の速い操舵時およびゆつくりした操舵
時における復元トルクの変動状況を示す説明図で
ある。１……ハンドル、２……ステアリングシヤフト
、３……前輪、４……コントロールバルブ、５…
…油圧ポンプ、６……パワシリンダ、７……ステ
アリング制御用モータ、８……舵角センサ、９…
…制御回路、１０……車速センサ。 FIG. 1 is an explanatory diagram showing an embodiment of the present invention, FIG. 2 is a block diagram of the control circuit shown in FIG. 1, and FIG. 3 is a flowchart showing the control mode of the device of the present invention.
Fig. 4 is a characteristic diagram of the steering angular velocity when switching to the steering angle deceleration, Fig. 5 is an explanatory diagram showing the variation of the steering angular velocity during fast steering and slow steering, and Fig. 6 A and B are respectively the results of the invention developed by the present invention. An explanatory diagram showing the fluctuations of restoring torque during fast steering and slow steering of the device, Figure 7 A and B show the fluctuations of restoring torque during fast and slow steering of the conventional device, respectively. It is an explanatory diagram. 1... Handle, 2... Steering shaft, 3... Front wheel, 4... Control valve, 5...
... Hydraulic pump, 6 ... Power cylinder, 7 ... Steering control motor, 8 ... Steering angle sensor, 9 ...
...Control circuit, 10...Vehicle speed sensor.

Claims

[Scope of Claim for Utility Model Registration] (1) From torsional torque detection means for detecting torsional torque of a steering shaft of a power steering system for a vehicle that provides power assist in the steering direction in accordance with torsional torque of the steering shaft. A steering control motor is provided which is connected to the steering shaft near the steering wheel and provides a restoring torque to return the steering shaft to the straight direction, and the electric current to the steering control motor is applied such that a large restoring torque is applied when the steering wheel is returned to the steering wheel, and a large restoring torque is applied when the steering wheel is turned back. Variable control is performed to provide a small restoring torque, and control is performed so that the restoring torque changes at a constant rate of change when switching from the time of returning the steering wheel to the time of increasing turning, and furthermore, the steering angular speed is reduced to a deceleration state when returning the steering wheel. and a control circuit that controls to switch the restoring torque applied when returning the steering wheel to a restoring torque having the same magnitude as the restoring torque applied when increasing steering when the steering angular speed reaches a preset switching steering angular speed. Control of a power steering system for a vehicle, characterized in that the control circuit is provided with logic that variably controls the switching steering angular speed to increase as the steering angular deceleration increases. Device. (2) A control device for a power steering system for a vehicle, characterized in that the restoring torque variably controlled by the control circuit according to claim (1) is configured to decrease as the vehicle speed increases. . (3) A power source for a vehicle, characterized in that the restoring torque variably controlled by the control circuit according to claim (1) or (2) increases as the lateral acceleration increases. Steering device control device.