摘要:
The fluid pressure control device according to the present invention is equipped with a valve body (26) which has an input port (28) connected to a hydraulic fluid source (48), an output port (30) which is connected to a pressure chamber (16) of a clutch (2) of an automatic transmission, and a discharge port (32), a solenoid valve (24) which is incorporated in the valve body (26) and has a valve spool (34) designed to selectively connect the output port (30) to the input port (28) or the discharge port (32), a discharge passage (60) which extends from the discharge port (32) of the valve body (26), the discharge passage (60) having a discharge port (68) which is positioned at a higher level than the liquid level of the oil pan (53) of the automatic transmission, and a reed valve (70) which closes the discharge port (68) of the discharge passage (60) and allows the discharge of the hydraulic fluid only through the discharge port (68).