| 摘要 |
PURPOSE:To increase the spring constant of a suspension unit, regarding the control ability of a vehicle as being important, even through the vehicle runs on a relatively bad road surface, by automatically carrying out a variable control to increase the spring constant when any one of three kinds of detection signals is detected. CONSTITUTION:A G sensor 1 detects the acceleration G of vertical vibration ¦G¦ of a vehicle body while an S sensor 2 detects the steering angle ¦S¦ and a B sensor 3 detects the turn-on or turn-off condition of a brake key switch. Further, an H-signal which indicates that the spring constant is large is fed from the output terminal of an OR circuit 8. When this H-signal is issued, it is fed through a timer 13 to energize a solenoid 23 which closes passages 25, 26, thereby the spring constants of both fluid charged bushings 31, 41 are automatically controlled to be made large. Further, the spring constant is made large in every case of running on a relatively bad road surface having large undulation, cornering and braking, regarding the control ability of the vehicle as being important. |
