PURPOSE: To increase the ability of attitude change restraint at the initial time of action by providing a damping force regulating valve that is in series with an orifice and conducts control in the direction of raising initial load based on an outside signal, restoring gradually initial load after its control.
CONSTITUTION: In the case of a chock absorber equipped with an oil passage that passes through an orifice 22, in parallel with the oil passages of main vales 11, 13 for damping force generation, a damping force regulating valve 17 that is in series with the orifice 22 and conducts control in the direction of initial load being raised by means of an outside signal, is provided. As a result, when an outside signal for attitude control start is received, damping force generated by the damping force regulating valve 17 comes to be increased, and increased damping force having the valve characteristic of projecting upward from a microlow speed sphere at the initial time of action, is generated. Accordingly, the ability of a shock absorber 11 is remarkably increased, and travel stability can secured. Also, generated damping force is gradually restored to the former state after attitude control, so confortableness during control is secured, and the instability of operation due to throw up from the lower part or the like can also be removed.
IKOMA AKIHISA
MATSUDA HISASHI
SAKAI SHIZUKA
