Integrated pressure control actuator assembly of hydrogen supply system

An integrated pressure control actuator assembly of a hydrogen supply system in a fuel cell system of a vehicle, the integrated pressure control actuator assembly comprising:

• a pressure control actuator formed on a body, which actively controls pressure and flow of hydrogen gas;
• a bypass valve formed on the body, which becomes open in the event of a failure of the pressure control actuator so as to enable hydrogen to flow toward a fuel stack of the vehicle,
• a normal flow path formed on the body, through which hydrogen gas is transferred from a start/stop solenoid valve to the pressure control actuator;
• an auxiliary flow path formed on the body, through which hydrogen gas is transferred according to opening and closing of the bypass valve connected to the normal flow path,
• wherein the bypass valve is a solenoid valve that maintains pressure and flow of hydrogen gas supplied through the auxiliary flow path by solenoid force and the size of an orifice formed in the bypass valve, and
• wherein the bypass valve is connected in the middle portion of the normal flow path in order to open and close the flow of hydrogen gas to the auxiliary flow path formed on the body;
• and
• a control means for controlling the opening and closing of the bypass valve by detecting a failure of the pressure control actuator
• wherein the control means compares a difference between a target pressure according to a load and a stack inlet pressure supplied through the pressure control actuator with a predetermined reference value to detect a failure of the pressure control actuator and, if a failure is detected, opens the bypass valve so that fuel is supplied through the auxiliary flow path.