Abstract: A system and method for controlling a fuel cell of a vehicle are provided. The method includes sensing a time point when pressure control is necessary by sensing whether an output of the fuel cell is additionally necessary or whether the fuel cell can be in a dry-out state. In response to sensing that the pressure control is necessary, a required valve opening degree of an air outlet is derived by substituting a target air pressure for a data map. A fuel cell air outlet valve is then adjusted based the derived valve opening degree of the air outlet.

Abstract: A control method and system of a fuel cell system is provided. The control method includes detecting, by a controller, a voltage of a fuel cell stack when power generation of a fuel cell is stopped while a fuel cell vehicle is being driven. In addition, hydrogen supply pressure at an anode side is adjusted based on a variation in the detected voltage.

Abstract: An apparatus and method for controlling hydrogen purging are provided. The apparatus includes a purging valve that is provided for an outlet disposed adjacent to an anode of a fuel cell stack and is configured to adjust an outflow of water from the fuel cell stack. In addition, a controller is configured to adjust an opening of the purging valve according to a charge capacity obtained by integrating a current of the fuel cell stack. The controller is configured to calculate the charge capacity by multiplying the current of the fuel cell stack by a scale factor when a load for an output current of the fuel cell stack is less than a first reference load which is preset.

Abstract: A system and method of controlling an air blower for a fuel cell vehicle are provided. The method includes determining an operation amount of an air blower to secure a sufficient air flow rate under present operating conditions and obtaining information regarding clogging of an air channel or information regarding a back pressure using the operation amount of the air blower. In addition, a maximum operating range of the air blower is changed based on whether a present state is an air channel-clogged state or a back pressure-increased state.

Abstract: The present invention provides a method for controlling the temperature of a fuel cell system by controlling the rotational speeds of a coolant pump and a cooling fan based on the coolant outlet temperature, the amount of heat generated by a fuel cell stack, etc. In particular, the present invention controls the temperature of a fuel cell system by utilizing a controller which receives a coolant outlet temperature from a sensor in a state where a reference temperature for each stage is determined with respect to the coolant outlet temperature and a target rotational speed for each stage is determined based on the coolant outlet temperature. Then the controller performs proportional integral (PI) control with respect to each rotational speed of a coolant pump and a cooling fan at the target rotational speed for each stage determined based on the current coolant outlet temperature detected by the water temperature sensor.

Abstract: A system and method for controlling a fuel cell of a vehicle are provided. The method includes sensing a time point when pressure control is necessary by sensing whether an output of the fuel cell is additionally necessary or whether the fuel cell can be in a dry-out state. In response to sensing that the pressure control is necessary, a required valve opening degree of an air outlet is derived by substituting a target air pressure for a data map. A fuel cell air outlet valve is then adjusted based the derived valve opening degree of the air outlet.

Abstract: A control method and system of a fuel cell system is provided. The control method includes detecting, by a controller, a voltage of a fuel cell stack when power generation of a fuel cell is stopped while a fuel cell vehicle is being driven. In addition, hydrogen supply pressure at an anode side is adjusted based on a variation in the detected voltage.

Abstract: A system and method of controlling an air blower for a fuel cell vehicle are provided. The method includes determining an operation amount of an air blower to secure a sufficient air flow rate under present operating conditions and obtaining information regarding clogging of an air channel or information regarding a back pressure using the operation amount of the air blower. In addition, a maximum operating range of the air blower is changed based on whether a present state is an air channel-clogged state or a back pressure-increased state.

Abstract: An apparatus and method for controlling hydrogen purging are provided. The apparatus includes a purging valve that is provided for an outlet disposed adjacent to an anode of a fuel cell stack and is configured to adjust an outflow of water from the fuel cell stack. In addition, a controller is configured to adjust an opening of the purging valve according to a charge capacity obtained by integrating a current capacity of the fuel cell stack. The controller is configured to calculate the charge capacity by multiplying the current capacity of the fuel cell stack by a scale factor when a load for an output current of the fuel cell stack is less than a first reference load which is preset.

Abstract: The present invention provides a method for controlling the temperature of a fuel cell system by controlling the rotational speeds of a coolant pump and a cooling fan based on the coolant outlet temperature, the amount of heat generated by a fuel cell stack, etc. In particular, the present invention controls the temperature of a fuel cell system by utilizing a controller which receives a coolant outlet temperature from a sensor in a state where a reference temperature for each stage is determined with respect to the coolant outlet temperature and a target rotational speed for each stage is determined based on the coolant outlet temperature. Then the controller performs proportional integral (PI) control with respect to each rotational speed of a coolant pump and a cooling fan at the target rotational speed for each stage determined based on the current coolant outlet temperature detected by the water temperature sensor.