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Title:
REAR WHEEL STEERING DEVICE FOR VEHICLE
Document Type and Number:
Japanese Patent JPH04345515
Kind Code:
A
Abstract:

PURPOSE: To ensure vehicle travel stability during deceleration in turning state by providing a change means for setting a threshold value smaller to initiate toe-in control, according to a handle steering angle increase in a steering device to steer a rear wheel in a toe-in direction at the time of deceleration.

CONSTITUTION: A four-wheel drive vehicle is equipped with a front wheel steering mechanism A having a steering mechanism C connected thereto, and a rear wheel steering mechanism B actuated with a drive means E. Also, the drive means E has a stepping motor 30 driven and controlled with a control unit 40. This control unit 40 obtains control values via input values from a speed sensor S1, a throttle position sensor S2 or the like, and controls right and left rear wheels for steering in a toe-in direction at the time of deceleration. In this case, toe-in control is caused to start, when the deceleration of the vehicle exceeds the predetermined threshold value. Furthermore, a threshold value to initiate the toe-in control is so set as to become smaller according to an increase in a steering angle, on the basis of the values of a handle steering angle and vehicle speed.


Inventors:
KOSAKA MASAMUTSU
OMURA HIROSHI
UEDA KOJI
MISHIMA RITSUYA
Application Number:
JP11969391A
Publication Date:
December 01, 1992
Filing Date:
May 24, 1991
Export Citation:
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Assignee:
MAZDA MOTOR
International Classes:
B60G17/015; B60G7/00; B62D6/00; B62D17/00; B62D101/00; B62D103/00; B62D109/00; B62D113/00; B62D119/00; (IPC1-7): B60G17/015; B62D6/00; B62D17/00; B62D101/00; B62D103/00; B62D109/00; B62D113/00; B62D119/00
Attorney, Agent or Firm:
Minoru Nakamura (7 outside)



 
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