Title:
REAR WHEEL STEERING DEVICE FOR AUTOMOBILE
Document Type and Number:
Japanese Patent JPS63162372
Kind Code:
A
Abstract:
PURPOSE:To enable controlling the steering angle of rear wheels optimally at all times by judging a running mode and controlling said angle via the selection of the characteristics of front and rear wheel steering angle ratios optimum for the judged running mode from a plurality of the characteristics as preliminarily set up. CONSTITUTION:A front wheel steering angle sensor 1, a speed sensor 2 and a rear wheel steering angle sensor 3 are provided, and output signals from said sensors are inputted to a control unit 4. In the running mode judgement part 41 of the control unit 4, a running mode (i.e. running condition at street, in suburbs and mountain, on freeway and so on) is judged from a mean steering amount and a mean speed within the preliminarily determined sampling time. And according to the result of the judgement, a plurality of the preliminarily determined characteristics of front and rear wheel steering angle ratios are selected and the theoretical steering angle of rear wheels in this case is determined from a front wheel steering angle and an automobile speed on the basis of the selected ratios, thereby driving and controlling an actuator 6 for steering the rear wheels via a drive circuit 5.
Inventors:
KUBOTA MIDORI
Application Number:
JP31343786A
Publication Date:
July 05, 1988
Filing Date:
December 26, 1986
Export Citation:
Assignee:
FUJI HEAVY IND LTD
International Classes:
B62D7/14; B62D7/15; (IPC1-7): B62D7/14
Attorney, Agent or Firm:
Kiyose Saburo