Patent ID: 8997771
Filing Date: 2015-04-07
Classification: G05D,H01M,Y02E,Y02T,Y10T

Abstract:
1. 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 start/stop solenoid valve, a bypass valve, and a pressure control actuator, which are integrally formed in a single body; a normal flow path formed on the body, through which hydrogen gas is transferred from the 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; 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 auxiliary flow path is connected to an ejector through a flow path separated from the normal flow path, and 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, 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.