Title:
FOUR-WHEEL STEERING DEVICE FOR VEHICLE
Document Type and Number:
Japanese Patent JPS63112281
Kind Code:
A
Abstract:
PURPOSE:To enable a tack-in phenomenon in the time of deceleration to be promptly further surely prevented, by providing a restricting means which inhibits steering ratio from being controlled in the reverse phase direction when a deceleration signal is received from a detecting means which detects a vehicle deceleration condition. CONSTITUTION:In accordance with an output of a car speed sensor 101, a number of reference operating steps of a stepping motor 50 in proportion to a car speed is calculated in a number of reference steps arithmetic part 102, and the reference steering ratio characteristic is obtained by actuating said motor 50. Here a deceleration condition decision part 118, which inputs an output signal from a brake sensor 117 detecting the acceleration of gravity in the longitudinal direction (longitudinal G) of a vehicle, is provided in a control unit 100. And when a deceleration condition is decided in said deceleration condition decision part 118, a control inhibition signal, which inhibits steering ratio from being controlled in the reverse phase direction, is output. In this way, a tack in phenomenon is promptly further surely prevented when deceleration is performed in the time of turning action.
Inventors:
MIYOSHI AKIHIKO
Application Number:
JP25910786A
Publication Date:
May 17, 1988
Filing Date:
October 30, 1986
Export Citation:
Assignee:
MAZDA MOTOR
International Classes:
B62D7/14; B62D7/15; (IPC1-7): B62D7/14
Attorney, Agent or Firm:
Minoru Nakamura