Pressure-reducing valve with injector and fuel cell system including pressure-reducing valve

A pressure-reducing valve with an injector comprising:

• a body that includes an internal space;
• an introduction channel provided in the body, introducing a high-pressure fluid into the internal space;
• a discharging channel provided in the body, discharging a depressurized fluid from the internal space;
• a shuttle valve body disposed between the introduction channel and the discharging channel in the internal space of the body;
• a shuttle valve seat which is provided in a position close to the internal space in the discharging channel, and at which the shuttle valve body is capable of coming into contact with the shuttle valve seat and the shuttle valve body is capable of separating from the shuttle valve seat;
• a back-pressure chamber surrounded by a back surface of the shuttle valve body and a wall surface of the internal space of the body, communicating with the introduction channel through a gap between the shuttle valve body and the wall surface of the internal space;
• a back-pressure channel communicating with the back-pressure chamber and discharging the fluid of the back-pressure chamber;
• a biasing portion biasing the shuttle valve body in a direction coming into contact with the shuttle valve seat;
• and
• an injector adjusting an intermittent time interval of the fluid in the back-pressure chamber discharged through the back-pressure channel and discharging the fluid to the discharging channel or a channel that communicates with the discharging channel.