Dual-fuel injector

A dual-fuel injector 10 for injecting two separate fuels into a combustion chamber 12 of an internal combustion engine. The injector comprises a nozzle body 14 housing first 16 and second 18 fuel needle valves, a first fuel control chamber 28, a second fuel control chamber 32, a first fuel control v...

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Bibliographische Detailangaben
Hauptverfasser:	Mark Stephen Harper, Stephen Crossley
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF WEAPONS
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Beschreibung
Zusammenfassung:	A dual-fuel injector 10 for injecting two separate fuels into a combustion chamber 12 of an internal combustion engine. The injector comprises a nozzle body 14 housing first 16 and second 18 fuel needle valves, a first fuel control chamber 28, a second fuel control chamber 32, a first fuel control valve 64 defining a first switching volume 68 fluidly coupled to the first fuel control chamber and a second fuel control valve 66 defining a second switching volume 70 fluidly coupled to the second fuel control chamber. The injector further includes an annular hydraulic sealing gallery 56 extending around an outer surface of the first fuel needle valve and is coupled to a source of high-pressure fluid. The sealing gallery 56 is fluidly coupled to at least one of the switching volumes (68 or 70) such that the respective switching volume is fluidly coupled to the source of high-pressure fluid via the sealing gallery 56.