System for controlling suspension in accordance with road conditions
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 30, 1996
Grant Date -
N/A
app pub date -
Feb 12, 1993
filing date -
Feb 14, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A suspension system includes air suspensions provided for individual wheels of a motor vehicle, each including a damping force switching actuator and an air supply/discharge actuator for the air spring. It further includes sensor for detecting the steering angle of a steering wheel, a sensor for detecting the vehicle velocity, and a control device for controlling the damping force and spring constant of each air suspension in accordance with the values detected by means of the sensors. This thereby reduces the roll of the vehicle body and modifies the steering characteristic of the motor vehicle. The control device includes a controller for detecting the gradient and flexure degree of a road. It further includes a controller for discriminating the road conditions by fuzzy inference in accordance with the gradient and flexure degree, and for determining the delay time or time interval between the start of the roll control for the rear portion of the vehicle body and the start of the roll control for the front portion of the vehicle body in accordance with the result of the discrimination.
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