Hyundai Motor Company

Kia Motors Corporation

Kia Corporation

Kang Sik Jeon

Sung Ho Yang

Jae Young Shim

Young Pin Jin

Jae Hun Jang

Sung Mun Cho

Jae Won Jung

Sae Hoon Kim

Dong Hun Lee

Kwi Seong Jeong

Seung Yoon Lee

Se Kwon Jung

Hyo Jin Park

Ji Hwan Yu

Min Gon Kim

Kyu Ii Lee

A hydrogen storage system may include a storage container storing liquid hydrogen, a supply line connected to the storage container and to a fuel cell system, the supply line supplying gaseous hydrogen to the fuel cell system from the storage container, a compressor mounted in the supply line and compressing the gaseous hydrogen, a bypass line connecting the supply line and the storage container and allowing the gaseous hydrogen to flow from the supply line to the storage container, a control valve mounted in the bypass line and selectively adjusting a bypass flow rate of the gaseous hydrogen, an orifice provided in the bypass line, and a controller configured to control the control valve, accurately adjusting a supply pressure of the storage container and a supply amount of the hydrogen to be supplied to the fuel cell system based on the operation conditions of the fuel cell system.

Hydrogen storage system

A method for controlling a fuel cell vehicle is provided. The method includes setting a target purge degree of an anode gas and a target opening degree of an air pressure control valve and determining whether a fuel cell stack is in a power generation stop state. When the fuel cell stack is in the power generation stop state, when the anode gas is purged from the anode based on the target purge degree and the target opening degree, whether hydrogen in the anode gas will flow backwards to a stack enclosure is determined. When the hydrogen flows backwards, at least one of the target purge degree and the target opening degree to a level at which the backflow of the hydrogen is prevented is modified, and the anode gas from the anode based on the modified target purge degree and the modified target opening degree is purged.

Method for controlling fuel cell vehicle

A control method for a fuel cell system is provided to prevent freezing in an air exhaust system of the fuel cell system. The method prevents freezing in the exhaust system by specifying a vehicle condition in which possibility of freezing is high and operating the fuel cell system based on different vehicle-specific standards. The performs air supercharging control based on an ambient temperature and a temperature of cooling water, air supercharging control by applying weights based on inclinations of a vehicle, and a forced heating logic using a COD heater.

Control method for fuel cell system to prevent freezing in air exhaust system

A shutdown control method of a fuel cell is provided. The method includes applying power to a controller in a shutdown state and determining, by the controller to which the power is applied, a possibility of moisture freezing based on an estimated outdoor temperature or the temperature of a fuel cell stack. A shutdown of the fuel cell is executed by performing moisture removal from the fuel cell stack in response to determining the possibility of moisture freezing after restart.

Shutdown control method and shutdown control system of fuel cell

A method of determining a state of cooling water is provided. The method includes operating, by a controller, a driving motor of a cooling water-circulating pump that is configured to circulate cooling water at a fixed current, a fixed torque, or a fixed power. In addition, the controller is configured to calculate an average rotation speed of the driving motor for a preset first period of time during the operation of the driving motor. Whether the circulation state of the cooling water is normal is determined based on an error between the calculated average rotation speed and a preset reference rotation speed.

Method of determining circulation state of cooling water

A control method for a motor-driven vehicle is provided. The method includes calculating a correction torque of a drive motor through a difference between speeds of wheels or a variance rate of the difference between speeds of the wheels and comparing a calculated correction torque with a current required torque of the drive motor. When the calculated correction torque is greater than the current required torque, the drive motor is operated based on the current required torque. When the calculated correction torque is less than or equal to the current required torque, the drive motor is operated based on the calculated correction torque, or the required torque of the drive motor is corrected to correspond to the calculated correction torque and the drive motor is operated based on a corrected required torque of the drive motor.

Control method and control system for motor-driven vehicle

A method for controlling a fuel cell system includes steps of: (a) determining whether hydrogen (H) is detected in an interior space of a stack enclosure in which a fuel cell stack is accommodated; (b) stopping power generation that is performed using the stack when it is determined in step (a) that the hydrogen is detected; (c) opening a purge valve to discharge gases circulating in an anode through the purge valve, and opening a condensate discharge valve to discharge condensate contained in a water trap through the condensate discharge valve; and (d) determining whether the hydrogen discharged through at least one of the purge valve and the condensate discharge valve in step (c) flows back to the interior space based on Hconcentration in the interior space.

Method for controlling fuel cell system

An apparatus and a method for detecting leakage in a hydrogen tank of a hydrogen fuel cell vehicle are provided. Particularly, leakage is detected due to failure of an airtight seal of a solenoid valve in a hydrogen tank based on a change of the sensing value of a high pressure sensor which represents a hydrogen tank pressure during a process of performing a wakeup operation at the time of key-off of a vehicle.

Apparatus and method for detecting leakage in hydrogen tank of hydrogen fuel cell vehicle

A fuel cell stack diagnostic system is provided. The system includes a fuel cell stack having a plurality of cell channels and a diagnostic analyzer that performs a voltage measurement on each of the plurality of cell channels. The diagnostic analyzer determines that the voltage measurement is abnormal as a first level when a voltage ratio is less than a first reference voltage ratio when starting a vehicle in which the fuel cell stack diagnostic system is mounted. Additionally, the voltage ratio is a ratio of a minimum cell channel voltage to an average cell channel voltage.

Fuel cell stack diagnostic system and diagnostic method thereof

A method of controlling energy supply in a fuel cell vehicle includes storing an output current of a fuel cell as a pre-limited current when a cell voltage ratio reaches a minimum cell voltage ratio, setting a limited output current of the fuel cell as the pre-limited current when the cell voltage ratio reaches a hazard cell voltage ratio, connecting first and second high-voltage batteries to a main bus terminal in parallel when the cell voltage ratio reaches the hazard cell voltage ratio, and outputting a supplementary current from the second high-voltage battery by an insufficient amount of the output current of the fuel cell for the pre-limited current, and a system for performing the same.

Method and system for controlling energy supply in fuel cell vehicle

An apparatus and a method for controlling vehicle start-up modify a sequence order in which control units of the vehicle are started up to improve reliability. In operation, a processor determines whether a voltage of a low-voltage battery is less than a reference voltage when a start key is turned on, and determines a voltage classification level corresponding to the voltage of the low-voltage battery when the voltage of the low-voltage battery is less than or equal to the reference voltage. The processor then determines a sequence order in which to start up driving units of the vehicle including a power conversion device of the vehicle based on the determined voltage classification level, and controls startup of the vehicle by reflecting the determined sequence order of the power conversion device.

Apparatus and method for controlling vehicle startup

A torque control method for a drive motor includes detecting, by a controller, an amount an accelerator pedal is pressed. The method also includes calculating a rate of change of the accelerator pedal based on the detected amount the accelerator pedal is pressed. Further, the method also includes determining a time constant of a drive motor corresponding to the calculated rate of change.

Torque control apparatus and method for drive motor

A method for controlling a creep torque of a motor-driven vehicle includes a gradient calculating step of calculating a gradient of a traveling road, and a time constant calculating step of calculating a time constant of a filter using the gradient, a preset basic creep torque, and a sliding speed limiting value. A variable controlling step substitutes the calculated time constant for the time constant of the filter, inputs the basic creep torque to the filter, and controls the motor using a torque value output from the filter as a demanded torque.

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Gyeonggi-do, South Korea

Kang Sik Jeon