Patent ID: 8147364

Claim:
A flow control valve comprising: a first port; a second port; a working fluid channel that is formed between the first port and the second port, and through which a working fluid passes; a check valve that is arranged in the working fluid channel, and is opened toward a first-port-side channel from a second-port-side channel of the working fluid channel; a valve-opening control section that is arranged at the check valve at the side of the second port, that forcibly opens the check valve when discharging the working fluid from the first port to the second port, and that increases a channel resistance of the second-port-side channel at the beginning of opening the check valve, wherein the valve-opening control section includes a spool that is arranged so as to be slidable in the axial direction in the working fluid channel and has a main body which is cylindrical and provided with a narrow portion that is continuous in the circumferential direction formed at the center in the longitudinal direction, and a projection formed so as to project toward the first port side at a position opposite to the check valve, and a guide member that is arranged in the second-port-side channel of the working fluid channel and forms a first space between the spool and the check valve and a second space between the spool and the guide member, and wherein the spool forcibly opens the check valve by moving toward the first port in the axial direction, and reduces a channel sectional area in the second space between the spool and the second-port-side channel at the beginning of opening the check valve.