Fuel supply valve

A fuel supply valve for supplying fuel from a fuel tank to a fuel cell stack, the fuel supply valve comprising:

• a plunger having a hollow therein;
• a core part disposed on the plunger;
• and
• a block part disposed within the hollow to maintain airtightness between the core part and the plunger,
• wherein a space in which airtightness of the hollow has been maintained by the plunger, the core part, and the block part is defined as a pressure chamber,
• wherein the pressure chamber is connected with an internal flow path penetrating an airtightness member disposed on a lower portion of the plunger,
• wherein the internal flow path is opened by lifting the plunger to discharge gas within the pressure chamber,
• wherein the fuel supply valve further includes a valve body disposed on a lower portion of the airtightness member,
• wherein the valve body comprises a seat part contacting the airtightness member by movement of the plunger, wherein the seat part blocks the gas within the pressure chamber from being discharged by contacting the airtightness member, and wherein the seat part comprises an internal space through which gas flows and the internal space is connected with the internal flow path,
• wherein a diameter of a cross section of the internal flow path perpendicular to a direction extending from the pressure chamber to the internal space is smaller than a diameter of a cross section of the pressure chamber perpendicular to the direction extending from the pressure chamber to the internal space;
• wherein the internal flow path directly connects the internal space and the pressure chamber;
• and
• Wherein a diameter in all sections of the inner flow path is smaller than a diameter of the pressure chamber.