JPS62112667U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a diagram corresponding to the configuration of the invention described in the claims for utility model registration, FIG. 2 is a diagram showing the basic configuration of the vehicle power steering device according to the invention, and FIG. FIG. 4 is a control block diagram showing the control state in the basic configuration shown in FIG. 2;
FIG. 5 is a schematic diagram of a vehicle power steering system showing a specific embodiment of the present invention, FIG. 6 is a flowchart of a program executed by the microcomputer in FIG. 5, and FIGS. 7A and 7B are FIG. 6 is a diagram showing the steering characteristics of the vehicle in the specific embodiment, and FIG.
The figure is a diagram showing the characteristics of the corrected steering reaction force in the specific embodiment of FIG. 6. Explanation of symbols, 20... Steering handle, 21...
Steering shaft, 22... Steering shaft motor, 23... Steering displacement amount sensor, 24... Steering force sensor, 30... Steering shaft motor, 32... Steering shaft, 33a, 33b...
...Front wheel, 37... Steering displacement amount sensor, 38... Steering reaction force sensor, 40... Steering shaft motor control circuit,
41... Steering shaft motor control circuit, 42... Steering force calculator, 43... Steering reaction force calculator, 44... Steering displacement amount calculator, 45... Steering displacement amount calculator, 50
...Vehicle speed sensor, 51...Microcomputer.

Claims (1)

[Scope of utility model registration request] A vehicle steering device that steers steering wheels in response to rotation of a steering wheel includes a steering shaft connected to the steering wheel, a steering shaft actuator that rotationally drives the steering shaft, and a steering shaft actuator that is connected to the steering wheel and rotates the steering shaft. A steering control means for steering wheels, a steering force sensor for detecting a steering force applied to the steering shaft from a steering wheel, and a steering reaction force applied to the steering control means from a steering wheel. a steering reaction force sensor that detects a rotation angle of the steering shaft from a reference position as a steering displacement amount; a first control amount determining means that has a characteristic and determines a first control amount that rotates the steering shaft in the direction in which the steering force is applied; A direction in which the steering shaft is returned to the reference position, having a characteristic of increasing in accordance with an increase in the detected steering reaction force when it is less than a predetermined value, and maintaining a substantially constant value when the reaction force is equal to or greater than the predetermined value. a second control amount determining means for determining a second control amount to rotate the steering shaft; a steering shaft rotation control signal output means for controlling a steering shaft rotation control signal; a target turning amount determining means for determining a target turning amount that increases in accordance with an increase in the detected steering displacement amount based on the output of the steering displacement amount sensor; Steering that outputs a steering control signal according to a target steering amount to the steering control means and controls the steering control means so that the amount of steering of the steered wheels becomes the determined target turning amount. A power steering device for a vehicle, comprising: a control signal output means.