Solenoid flow control valve

A solenoid flow control valve comprising:

• a housing including an inlet port and an outlet port, the housing being provided with a pilot pressure chamber therein;
• an inlet passage that allows the inlet port to communicate with the pilot pressure chamber;
• an outlet passage that allows the pilot pressure chamber to communicate with the outlet port;
• a fixed restrictor provided on the outlet passage;
• a bypass passage that allows the pilot pressure chamber to communicate with the outlet port in a manner to bypass the fixed restrictor;
• a solenoid;
• a pilot spool that closes the inlet passage and opens the bypass passage when the solenoid is in a non-excitation state, and opens the inlet passage, generates a pilot pressure in the pilot pressure chamber, and closes the bypass passage when the solenoid is in an excitation state;
• and
• a main spool that controls a flow rate from the inlet port to the outlet port in accordance with the pilot pressure in the pilot pressure chamber.