NOVELTY - A fuel-cell-mounted vehicle (20) comprises a fuel cell (220) that is mounted in vehicle and supplies electric power to a power part of vehicle; a storage part to store water generated from fuel cell; and a liquid ejection apparatus (210) to eject the water of the storage part. The liquid ejection apparatus includes a pump chamber in which the water flows and a volume of the pump chamber is changed to eject the water; a diaphragm to change the volume of the pump chamber; and a piezoelectric element to deform the diaphragm. The apparatus ejects the water for washing a part of the vehicle.    USE - As fuel-cell-mounted vehicle in liquid ejection method, where the fuel cell is a phosphoric acid fuel cell (claimed). The vehicle includes automobile or emergency vehicle.    ADVANTAGE - The system effectively uses water generated from fuel cell. The water generated from the fuel cell is ejected using liquid ejection apparatus. Thus the water discharged when the fuel cell generates electric power can be effectively used. The excision of a living tissue i.e. a surgical operation using the liquid ejection apparatus can be performed with a less liquid quantity in the vehicle. Since the washing liquid in which the water generated from the fuel cell and the washing agent are mixed can be ejected by the liquid ejection apparatus, the water generated from the fuel cell can be used in a manner more suitable for vehicle washing. The system provides a highly practical system.    DETAILED DESCRIPTION - A fuel-cell-mounted vehicle (20) comprises a fuel cell (220) that is mounted in the vehicle and supplies electric power to a power part of the vehicle; a storage part to store water generated from the fuel cell; and a liquid ejection apparatus (210) to eject the water of the storage part. The liquid ejection apparatus includes a pump chamber in which the water flows and a volume of the pump chamber is changed to eject the water; a diaphragm to change the volume of the pump chamber; and a piezoelectric element to deform the diaphragm. The liquid ejection apparatus ejects the water for washing a part of the vehicle. Washing water in which a washing agent is mixed with the water generated from the fuel cell and which is used for washing the part of the vehicle is supplied to the storage part. An INDEPENDENT CLAIM is included for a liquid ejection method involving generating electric power by using a fuel cell mounted in a vehicle; storing water generated from the fuel cell; supplying the electric power generated by the fuel cell to a power part of the vehicle; and ejecting the stored water from a liquid ejection apparatus mounted in the vehicle.    DESCRIPTION OF DRAWING(S) - The figure shows a basic structural view of a fuel cell automobile.    Fuel cell automobile (20)    Water jet knife/liquid ejection apparatus (210)    Fuel cell (220)    Cooling part (230)    Tank (240)    Secondary battery (245)    Motor (247)    Electric power adjuster (249)    External pump (250)    System control apparatus (257)