| 摘要 |
PURPOSE:To prevent the swing back after the brake release by making the suspension characteristic hard by the brake detection signal and keep a hard condition after the brake release for a short time at a high speed and for a long time at a low speed in a variable-characteristic suspension control unit. CONSTITUTION:Signals G1, G2 are outputted from timers 55, 56 of a control unit 10 based on the signal E of a brake sensor 13, the same signals I, J as the signals G1, G2 respectively are outputted from an AND circuit 58 at a high speed and from an AND circuit 60 at a low speed for respective preset times, then operate a step motor 6 and a solenoid valve 9 via a drive circuit 63 and keep the suspension characteristics hard for respective times of timers 55, 56. In this case, the output signal G1 of the timer 55 is set to be turned off at a short time delay after the input signal G is made off, and the output signal G2 of the timer 56 is set to be turned off at a longer time delay. Thereby, a hard condition can be kept after the brake release for respective times in response to the high and low speeds, and the swing back can be prevented. |
