Abstract: A shock absorber controller controls a shock absorber so that a damping force thereof is increased when a vertical movement of a vehicle body is returned approximately to a mean position of the vehicle body after it is determined that it is necessary to alter the damping force of the shock absorber.

Abstract: A shock absorber controller controls a shock absorber so that a damping force thereof is altered to an increased magnitude after the elapse of a predetermined delay time when it is determined that a vertical movement of a vehicle body exceeds a first threshold value, and the damping force is maintained at the increased magnitude for a predetermined hold time. After a determination inhibiting time elapses, it is determined whether or not the vertical movement of the vehicle body exceeds a second threshold value. When it is determined that the vertical movement has become greater than the second threshold value, the damping force of the shock absorber is maintained at the increased magnitude for a predetermined time even after the predetermined hold time elapses.

Abstract: A vehicle body vibration control apparatus separately controls a first vehicle height vibration mechanism provided on a front-wheel side and a second vehicle height vibration mechanism provided on a rear-wheel side. The first and second mechanisms provide first and second damping forces. When it is separately determined that the first and second damping forces should be increased, the first and second damping force are increased by a controller after first and second delay times elapse, respectively. The first and second delay times are selected in accordance with a current vehicle speed so that a front-wheel-side vehicle height vibration and a rear-wheel-side vehicle height vibration are converged toward a mean vehicle height from an identical converging direction and are suppressed to the mean vehicle height at almost the same time.