Abstract: An apparatus for injecting a coolant for a fuel cell vehicle is provided. More specifically, a coolant tank stores a coolant and a coolant pump, disposed in a coolant supply line connecting the coolant tank and the stack cooling loop is configured to pressure-transfer the coolant to the stack cooling loop, and circulating the coolant, which has passed through the stack cooling loop, to the coolant tank. A bubble elimination unit, disposed at a rear stage of the coolant pump in the coolant supply line, eliminates the bubbles in the fuel cell stack through vibration. This bubble elimination unit may be configured as an ultrasonic wave excitor for exciting the stack cooling loop with ultrasonic waves.

Abstract: The present invention relates to a cooling water supply system and a cooling water supply method for a fuel cell system in which a temperature difference in a fuel cell stack is prevented from increasing due to a rapid increase of a power output required in the stack by detecting a requested/demanded output. According to the present invention, a temperature difference in the stack due to a rapid increase in a power output demanded by the fuel cell stack is prevented from being rapidly increased by detecting a requested output (e.g., an amount an accelerator pedal is pushed, etc.) to calculate a power output required by the stack, calculating a predicted amount of generated heat depending on a required power output, and calculating a flux of supplied cooling water corresponding to the predicted amount of generated heat to control a flow rate of a cooling water supplier.

Abstract: An electric pump for a vehicle is disclosed. An electric pump for a vehicle, which is disclosed, may include a pump body that is divided into a motor room and a pump room, a shaft that is connected to the motor room and the pump room and a sealing unit is interposed therebetween, and an impeller that is mounted on the shaft in the pump room. More specifically, a leachate exhaust passage for exhausting leachate that is leaked through the sealing unit is formed in the pump body, and the leachate exhaust passage is connected to a reaction gas exhaust portion of a fuel cell stack to aide in the exhaust of the leachate accordingly.

Abstract: The present invention relates to a fuel cell cooling system for a vehicle comprising: a cooling water circulating loop formed to cool a fuel cell stack where a plurality of fuel cells are stacked. The cooling water circulating loop includes: a plurality of cooling water introducing ports through which cooling water passing through the stack is introduced; a plurality of cooling water discharging ports corresponding to the plurality of cooling water introducing ports and through which the cooling water which has passed through the stack is discharged; and a plurality of cooling water channels connecting the plurality of cooling introducing ports and the plurality of cooling water discharging ports. Notably, cooling water flows in different directions in the plurality of cooling water channels.

Abstract: The present invention provides a fuel cell separator and a method for surface treatment of the same, in which ionized nanoparticles are attached to the surface of a separator to form fine projections such that the surface of the separator exhibits superhydrophobicity. For this purpose, the present invention provides a method for surface treatment of a fuel cell separator which provides nanoparticles for forming fine projections on the surface of the separator to a discharge electrode and ionizes the nanoparticles by an arc discharge generated in the discharge electrode. The ionized nanoparticles are then attached to the surface of the separator by an electric field generated by applying a high voltage between the separator and the discharge electrode, thereby forming fine projections for imparting superhydrophobicity.

Abstract: The present invention provides an induction heating device for a fuel cell system, which can rapidly heat coolant during cold start-up, control the power consumption depending on the voltage of a fuel cell stack, and ensure the insulation resistance by separating a heating unit, which is in contact with the coolant, from the outside.

Abstract: The present invention provides a manifold insert having a plurality of distribution guides which reduce output voltage deviation due to flow instability between unit cells and prevent local flow instability of electrodes by stably distributing the flow of fluid (such as air, hydrogen, and coolant) supplied to a fuel cell stack, thereby maintaining a stable performance of the unit cells, and a fuel cell stack comprising the same.

Abstract: The present invention provides a fuel cell separator, in which a vortex generating structure is formed on the surface of a channel of the separator to induce a vortex of fluid (i.e., hydrogen and air) flowing through the channel, thus facilitating the supply of reactant gases and the removal of water droplets from a gas diffusion layer (GDL).

Abstract: An image processing apparatus, a sound processing method used for an image processing apparatus, and a sound processing apparatus are provided. The image processing apparatus includes a signal receiver which receives an image signal and an audio signal; an image processor which processes the image signal received by the signal processor to be displayed; and a sound processor which determines a first channel signal and a second channel signal corresponding to positions which are symmetrical based on a standard axis from the audio signal of each channel received by the signal receiver, and processes the first channel signal and the second channel signal based on a change in an energy difference between the first channel signal and the second channel signal.

Abstract: The present invention provides a humidifier, which is used as an auxiliary humidifier of a fuel cell together with an existing gas-to-gas humidifier to improve humidification performance in a low efficiency region of the gas-to-gas humidifier, thus increasing the output of the fuel cell and providing high efficiency operation.

Abstract: The present invention provides a local hydrophilic gas diffusion layer configured to enhance the water removal performance of a fuel cell For this purpose, the present invention provides a gas diffusion layer in which a region under each of a pair of lands, which receives a clamping pressure of the fuel cell stack, is subjected to local hydrophilic treatment by a simple process, thereby enhancing the water removal performance of the fuel cell stack. In particular, the local hydrophilic gas diffusion layer has a first region under each land of the separator which receives the clamping pressure; and a second region under the gas channel of the separator, wherein the first region is subjected to hydrophilic treatment.

Abstract: An electric water pump apparatus may include a body, a stator disposed in the body, a rotor in the stator, a pump cover having an inlet and an outlet, wherein a front surface of the body and the pump cover form a volute chamber, wherein a stator chamber is formed at an outer portion in the body in a radial direction and the stator is mounted in the stator chamber, and wherein a rotor chamber is formed at an inner portion in the body and the rotor is mounted in the rotor chamber, a shaft rotatably coupled to the front surface and fixed into the rotor, and an impeller fixed to a front portion of the shaft, wherein the shaft includes a first shaft connecting the impeller and a front end portion of the rotor and a second shaft connected to a rear end portion of the rotor along the central axis of the shaft.

Abstract: The present invention relates to an electric water pump having improved performance and durability. The electric water pump may include a stator generating a magnetic field according to a control signal, a rotor rotated by the magnetic field, a pump cover having an inlet and an outlet, a body having a front surface forming a volute chamber, a stator chamber, and a rotor chamber, the stator mounted in the stator chamber and the rotor mounted in the rotor chamber, a shaft having a central axis, fixed to the rotor and mounted in the rotor chamber, and an impeller fixed to the shaft so as to rotate together with the shaft, pressurizing the coolant having flowed in through the inlet, and mounted in the volute chamber, wherein the rotor chamber is fluidly connected to the volute chamber, and the stator chamber is fluidly closed and sealed from the rotor chamber.

Abstract: An electric water pump may include a stator generating a magnetic field, a rotor rotated by the magnetic field, a pump cover, a body having a volute chamber with the pump chamber, a stator chamber and a rotor chamber, the stator being mounted in the stator chamber and the rotor being mounted in the rotor chamber, a shaft fixed to the rotor, an impeller fixed to the shaft in the volute chamber, a driver case mounted at a rear end of the body and having a rear surface opened backward and formed of a driver chamber therein, and a driver mounted in the driver chamber and applying a control signal to the stator, wherein the case surface is provided with an insert portion protruded forward from an external circumference thereof and inserted in a rear end portion of the body, and a fixing groove in which the insert portion is inserted.

Abstract: An electric water pump may include a stator generating a magnetic field according to a control signal and a rotor rotated by the magnetic field generated at the stator and pressurizing coolant. According to the electric water pump, the stator may include, a stator core formed by stacking a plurality of pieces made of a magnetic material, an insulator connecting pieces of the stator core to each other, a coil coiling the stator core so as to form a magnetic path, a Hall sensor detecting a position of the rotor, a Hall sensor board controlling the control signal supplied to the stator according to the position of the rotor detected by the Hall sensor, and a stator case wrapping and sealing the stator core, the insulator, the coil, the Hall sensor, and the Hall sensor board.

Abstract: A bush assembly may include an inner pipe, in which a bolt hole is formed substantially in the middle thereof, an outer pipe, through which the inner pipe is inserted, wherein an inner circumference of the outer pipe is spaced with a predetermined gap from an exterior circumference of the inner pipe and the outer pipe includes a bent portion that is bent at a lower portion thereof and extends in a radial direction with a predetermined length, and an elastic member that couples the inner pipe and the outer pipe in the predetermined gap and is fixed to a lower surface of the bent portion.

Abstract: A water pump that is equipped with a bearing, may include a drive shaft, at least two bearings of an arc type that are mounted around the exterior circumference of the drive shaft and being engaged with each other, a housing that fixes the at least two bearings of the art type therein such that the drive shaft can rotate in the at least two bearings of the arc type.

Abstract: A method for manufacturing a stator for an electric water pump may be used for manufacturing the stator used in the electric water pump. In the electric water pump which includes stator assembly for an electric water pump, wherein the stator assembly including a plurality of core-insulator assemblies generates a magnetic field according to a control signal and a rotor is rotated by the magnetic field generated at the stator assembly to pressurize coolant, the method for manufacturing the stator assembly may include a) stacking a plurality of pieces made of a magnetic material to form a core stack, b) molding an insulator to the core stack, c) coiling a coil to the insulator to form a core-insulator assembly so as to form a magnetic path, and d) connecting the respective core-insulator assembly in an annular shape in sequence to form the stator assembly.

Abstract: An electric water pump apparatus may include a body having a stator chamber and a rotor chamber therein, a stator having a hollow cylindrical shape and being disposed in the stator chamber and generating a magnetic field, wherein the stator fluidly insulates the stator chamber and the rotor chamber, a rotor disposed in the rotor chamber and enclosed by the stator, wherein the rotor is rotated by the magnetic field, and a pump cover connected to the body and forming a volute chamber therein, wherein the volute chamber and the rotor chamber are fluidly-communicated through a connecting hole formed to the body and a coolant is supplied to the rotor chamber through the connection hole, wherein the stator includes a stator groove formed in an inner circumference therein and the stator groove is fluid-connected to the rotor chamber and the volute chamber through the connection hole.

Abstract: Disclosed herein is an apparatus for opening and closing an air flap for a vehicle. The apparatus for opening and closing an air flap may include a coolant temperature sensor provided at an engine to measure a coolant temperature of the engine, a control unit comparing a measurement value input from the coolant temperature sensor with a reference value stored therein, thus outputting a control signal, an actuator rotating in response to the control signal of the control unit, a power transmission unit connected to the actuator to transmit rotating force of the actuator, and a flap unit installed in an opening of a front end module carrier, and being selectively movable in a vertical direction in the opening by power transmitted from the power transmission unit to the flap unit to open or close the opening, thus permitting or preventing an inflow of air into the cooling module.