GAS FUEL INJECTION DEVICE

PROBLEM TO BE SOLVED: To provide a gas fuel injection device capable of certainly avoiding leakage of a gas fuel from the injector of an engine being stopped without involving an excessive increase of the cost. SOLUTION: The gas fuel injection device is equipped with fuel send-out passages 4a and 4b...

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Bibliographische Detailangaben
Hauptverfasser:	SATO YOICHI, KAWAYOKO KOJI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL CONTROLLING COMBUSTION ENGINES GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MECHANICAL ENGINEERING SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a gas fuel injection device capable of certainly avoiding leakage of a gas fuel from the injector of an engine being stopped without involving an excessive increase of the cost. SOLUTION: The gas fuel injection device is equipped with fuel send-out passages 4a and 4b provided in a gas fuel injection system of a gas engine 2 in such a way as extended from a fuel tank 1 while injector(s) 7 is installed at their tip end parts, a vaporizer 3 and a shutoff valve 5 installed upstream thereof, and an electronic control unit 10 to conduct the opening/closing control of the injector 7 and the shutoff valve 5, wherein a bypass 4c to connect upstream of the shutoff valve 5 to downstream of the vaporizer 3 is provided in such an arrangement that a pump 14 for returning the fuel is installed at the middle of the bypass. When the engine is stopped, the electronic control unit 10 drives the pump 14 to return the gas fuel remaining in the vaporizer 3 to the fuel tank 1 via the bypass 14, whereby lowers the fuel supply pressure to the injector 7 to the prescribed level or below. COPYRIGHT: (C)2008,JPO&INPIT