DARWIN mission and configuration trade-off

PCT No. PCT/JP92/01383 Sec. 371 Date Apr. 22, 1994 Sec. 102(e) Date Apr. 22, 1994 PCT Filed Oct. 23, 1992 PCT Pub. No. WO93/08416 PCT Pub. Date Apr. 29, 1993.In the shock absorber wherein the operation of the main valve for opening and closing a main oil channel by the action of the energizing current flowing through a linear solenoid thereby to control the damping power, an improvement in the response property of the main valve responsive to the change in moving amout of the piston or change in the set thrusting power of the linear solenoid. The shock absorber comprises a main chamber facing to one end of the main valve so as to transmit the hydraulic pressure in the high pressure side main oil chamber for biasing said main valve toward the direction for opening said main oil channel, a pilot chamber facing to the other end of said main valve, a pilot valve for receiving the pressure in the main chamber to be opened to release the pressure in said pilot chamber to the low pressure side main oil chamber, a linear solenoid for biasing the pilot valve to the closing direction, a variable orifice having a variable opening area varied by the relative movement of said pilot and main valves, a pilot flow channel extending from said main chamber through the variable orifice and through the pilot valve to the low pressure side main oil chamber.