Abstract: A water management system for a hydrogen engine is capable of reducing a capacity of a water tank for storing cooling water injected into the hydrogen engine and is capable of not requiring separate replenishment of water for the water tank. The water management system includes: a water tank module, which stores water for cooling the hydrogen engine; a water pump provided at the water tank module and configured to supply the water stored in the water tank module to the hydrogen engine; and an exhaust line provided between the hydrogen engine and the water tank module and configured to supply an exhaust gas, which contains water vapor discharged from the hydrogen engine, to the water tank module.

Abstract: A low profile flat bombe for Liquefied Petroleum Gas (LPG) storage and method for manufacturing the same, may include a flat bombe body including an upper plate having a plurality of first piercing holes and a pump installation hole formed therethrough, a lower plate having a plurality of second piercing holes formed therethrough at positions vertically coinciding with the plurality of first piercing holes, and side plates integrally connecting first and second side end portions of the upper and lower plates, end plates mounted at front and rear openings in the flat bombe body, and support pipes, wherein upper end portions of the support pipes are welded to internal circumferential portions of the plurality of first piercing holes and lower end portions thereof are welded to internal circumferential portions of the plurality of second piercing holes to maintain a vertical distance between the upper and lower plates.

Abstract: A low profile flat bombe for Liquefied Petroleum Gas (LPG) storage and method for manufacturing the same, may include a flat bombe body including an upper plate having a plurality of first piercing holes and a pump installation hole formed therethrough, a lower plate having a plurality of second piercing holes formed therethrough at positions vertically coinciding with the plurality of first piercing holes, and side plates integrally connecting first and second side end portions of the upper and lower plates, end plates mounted at front and rear openings in the flat bombe body, and support pipes, wherein upper end portions of the support pipes are welded to internal circumferential portions of the plurality of first piercing holes and lower end portions thereof are welded to internal circumferential portions of the plurality of second piercing holes to maintain a vertical distance between the upper and lower plates.

Abstract: A fuel pump module which may be easily assembled and mounted in a flat bombe having a small height in an LPG vehicle, may have a structure in which a reservoir cup may be rotated and restored with respect to a plate by support bars and springs, so that the fuel pump module may be easily assembled and mounted even in a flat bombe having a small height. Furthermore, members for blocking noise and absorbing vibration are combined with a fuel pump, so noise and vibration may be reduced when the pump is operated.

Abstract: A dual purge system for a vehicle includes an ejector including a drive inlet section connected to a first end of a main body section, a suction inlet section connected to a first side of the main body section, an outlet section coupled to an intake passage section, a nozzle section, and a diffuser, wherein the diffuser communicates with internal passages of the main body section and the outlet section and has a larger passage cross-sectional area than a channel cross-sectional area of an outlet of the nozzle section, wherein a driving fluid flows through the drive inlet section, in response to a negative pressure being produced in the main body section by the driving fluid, the suction inlet section suctions a fuel evaporation gas from a canister, and the outlet section discharges the driving fluid and the fuel evaporation gas.

Abstract: A dual purge system for a vehicle includes an ejector including a drive inlet section connected to a first end of a main body section, a suction inlet section connected to a first side of the main body section, an outlet section coupled to an intake passage section, a nozzle section, and a diffuser, wherein the diffuser communicates with internal passages of the main body section and the outlet section and has a larger passage cross-sectional area than a channel cross-sectional area of an outlet of the nozzle section, wherein a driving fluid flows through the drive inlet section, in response to a negative pressure being produced in the main body section by the driving fluid, the suction inlet section suctions a fuel evaporation gas from a canister, and the outlet section discharges the driving fluid and the fuel evaporation gas.

Abstract: A low profile flat bombe for Liquefied Petroleum Gas (LPG) storage and method for manufacturing the same, may include a flat bombe body including an upper plate having a plurality of first piercing holes and a pump installation hole formed therethrough, a lower plate having a plurality of second piercing holes formed therethrough at positions vertically coinciding with the plurality of first piercing holes, and side plates integrally connecting first and second side end portions of the upper and lower plates, end plates mounted at front and rear openings in the flat bombe body, and support pipes, wherein upper end portions of the support pipes are welded to internal circumferential portions of the plurality of first piercing holes and lower end portions thereof are welded to internal circumferential portions of the plurality of second piercing holes to maintain a vertical distance between the upper and lower plates.

Abstract: A method for diagnosing fuel leakage of a vehicle includes: measuring a pressure of a fuel tank by a pressure sensor in a closed state of a fuel system during starting-off of the vehicle; measuring an inner temperature of the fuel tank by a temperature sensor; and diagnosing, by a controller, whether or not leakage occurs by performing different leakage diagnoses depending on a pressure condition of the fuel tank. Thus, the controller performs a first leakage diagnosis when a pressure value of the fuel tank, measured in the measuring the pressure of the fuel tank, is within an atmospheric pressure level; performs a second leakage diagnosis when the pressure value is higher than a positive pressure; and performs a third leakage diagnosis when the pressure value is lower than a negative pressure.

Abstract: A method for diagnosing fuel leakage of a vehicle includes: measuring a pressure of a fuel tank by a pressure sensor in a closed state of a fuel system during starting-off of the vehicle; measuring an inner temperature of the fuel tank by a temperature sensor; and diagnosing, by a controller, whether or not leakage occurs by performing different leakage diagnoses depending on a pressure condition of the fuel tank. Thus, the controller performs a first leakage diagnosis when a pressure value of the fuel tank, measured in the measuring the pressure of the fuel tank, is within an atmospheric pressure level; performs a second leakage diagnosis when the pressure value is higher than a positive pressure; and performs a third leakage diagnosis when the pressure value is lower than a negative pressure.

Abstract: A fuel pump module which may be easily assembled and mounted in a flat bombe having a small height in an LPG vehicle, may have a structure in which a reservoir cup may be rotated and restored with respect to a plate by support bars and springs, so that the fuel pump module may be easily assembled and mounted even in a flat bombe having a small height. Furthermore, members for blocking noise and absorbing vibration are combined with a fuel pump, so noise and vibration may be reduced when the pump is operated.

Abstract: A purge system for fuel evaporation gas may include an ejector, having a nozzle configured to allow driving fluid to pass therethrough, a driving inlet through which the driving fluid is supplied into the ejector, a suction inlet through which purge gas including a fuel component is drawn as suction fluid from a canister into the ejector, a diffuser outlet through which a mixture of the driving fluid that has passed through the nozzle and the drawn purge gas is discharged out of the ejector, and a suction passage extending from the suction inlet toward a downstream side of the nozzle based on a flow direction of the driving fluid, and a bypass passage coupled from the suction inlet to the driving inlet.

Abstract: A purge system for fuel evaporation gas may include an ejector, having a nozzle configured to allow driving fluid to pass therethrough, a driving inlet through which the driving fluid is supplied into the ejector, a suction inlet through which purge gas including a fuel component is drawn as suction fluid from a canister into the ejector, a diffuser outlet through which a mixture of the driving fluid that has passed through the nozzle and the drawn purge gas is discharged out of the ejector, and a suction passage extending from the suction inlet toward a downstream side of the nozzle based on a flow direction of the driving fluid, and a bypass passage coupled from the suction inlet to the driving inlet.

Abstract: A stiffness reinforcement device for a fuel tank of a vehicle may include a body including a pair of pillars formed at both lateral end portions of the body; an upper fusing portion molded to an upper part of the body integrally and fused to an upper plate of the fuel tank; and a lower fusing portion molded to a lower part of the body integrally and fused to a lower plate of the fuel tank.

Abstract: A fuel-mixing prevention filler neck device is provided. The fuel-mixing prevention filler neck device includes a fuel dispensing gun insertion unit that receives a fuel dispensing thereinto and a coupling unit that provides fluid communication with a bottom of the fuel dispensing gun insertion unit. The coupling unit is disposed on an exterior circumferential surface thereof with coupling protrusions for fastening with a plurality of slots formed in a filler pipe. Further, a first side of a lower portion of the coupling unit is open to form a coupling region. A misfueling prevention unit slidably moves to the coupling region to be coupled to the coupling unit. Additionally, the misfueling prevention unit is closed when a gasoline fuel dispensing gun is inserted and being opened when a diesel fuel dispensing gun is inserted.

Abstract: A stiffness reinforcement device for a fuel tank of a vehicle may include a body including a pair of pillars formed at both lateral end portions of the body; an upper fusing portion molded to an upper part of the body integrally and fused to an upper plate of the fuel tank; and a lower fusing portion molded to a lower part of the body integrally and fused to a lower plate of the fuel tank.

Abstract: A diesel fuel filter for removing foreign substances and water contained in fuel used in a high-pressure fuel pump upon lubricating and cooling the high-pressure fuel pump is provided. The diesel fuel filter includes a lower cap for draining water including a double-lock cover and a double-lock pin to provide a double-lock structure to prevent fuel leakage caused by unfastening of the lower cap due to impact or vibration during driving of a vehicle.

Abstract: A diesel fuel filter for removing foreign substances and water contained in fuel used in a high-pressure fuel pump upon lubricating and cooling the high-pressure fuel pump is provided. The diesel fuel filter includes a lower cap for draining water including a double-lock cover and a double-lock pin to provide a double-lock structure to prevent fuel leakage caused by unfastening of the lower cap due to impact or vibration during driving of a vehicle.

Abstract: A fuel-mixing prevention filler neck device is provided. The fuel-mixing prevention filler neck device includes a fuel dispensing gun insertion unit that receives a fuel dispensing thereinto and a coupling unit that provides fluid communication with a bottom of the fuel dispensing gun insertion unit. The coupling unit is disposed on an exterior circumferential surface thereof with coupling protrusions for fastening with a plurality of slots formed in a filler pipe. Further, a first side of a lower portion of the coupling unit is open to form a coupling region. A misfueling prevention unit slidably moves to the coupling region to be coupled to the coupling unit. Additionally, the misfueling prevention unit is closed when a gasoline fuel dispensing gun is inserted and being opened when a diesel fuel dispensing gun is inserted.

Abstract: A controller integrated fuel pump module may include a receiving part formed on an outer surface of a flange assembled in a fuel tank, a PCB assembly configured by mounting elements of a controller to a PCB, wherein the PCB assembly is molded by a molding part while being received in the receiving part, and a convexo-concave portion having a shape in which recesses and bosses, the convexo-concave portion being repeatedly formed on an inner surface of the receiving part, such that a bonding force between the receiving part and the molding part is increased by the convexo-concave portion.

Abstract: A fuel management system for a hybrid vehicle driven by an electric motor and an internal combustion engine is provided. The system includes a check unit that detects a time in which the internal combustion engine was last operated and stores the detected time as an engine driving point in time. A controller receives the stored engine driving point in time and determines that a fuel remaining in a fuel tank is aged when a time period elapsing from the engine driving point in time reaches a set fuel leaving time period, to operate the internal combustion engine while the hybrid vehicle is driven.