Damping force control type hydraulic shock absorber

A damping force control type hydraulic shock absorber comprising:

• a cylinder in which a hydraulic fluid is to be sealably contained;
• a piston slidably received within said cylinder;
• a piston rod having one end connected to said piston and an opposite end extending outwardly from said cylinder;
• a main fluid passage and a sub fluid passage in fluid communication with said cylinder, such that upon a sliding movement of said piston within said cylinder the hydraulic fluid is allowed to flow through said main fluid passage and sub fluid passage;
• a pilot type damping valve in said main fluid passage;
• and
• a fixed orifice and a pressure control valve within said sub fluid passage, such that a pressure of the hydraulic fluid in said sub fluid passage between said fixed orifice and said pressure control valve can be applied to said pilot type damping valve as a pilot pressure,
• wherein said pressure control valve includes a valve chamber between a cylindrical sleeve and a slider that is slidably received within said cylindrical sleeve, whereby a thrust of said slider is to be generated due to a difference between pressure-receiving areas of said slider within said valve chamber, which pressure-receiving areas are to receive a pressure that is to act in an axial direction of said slider, and wherein a valve opening pressure is to be controlled in accordance with a balance between the thrust of said slider and a thrust of a solenoid.