HIGH-PRESSURE SEAL STRUCTURE, PROCESSING METHOD FOR HIGH-PRESSURE SEAL SURFACE, AND FUEL INJECTION VALVE

In a high pressure seal portion (26) that is formed by bringing a first contact surface (24) of an injector housing (2) to which a first fuel passage (13) is made to open and a second contact surface (25) of a nozzle body (3) to which a second fuel passage (14) is made to open into press contact wit...

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Bibliographische Detailangaben
Hauptverfasser:	KUBOTA, OSAMU, YUI, TAKAYUKI, FURUKAWA, HIDEO
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING 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:	In a high pressure seal portion (26) that is formed by bringing a first contact surface (24) of an injector housing (2) to which a first fuel passage (13) is made to open and a second contact surface (25) of a nozzle body (3) to which a second fuel passage (14) is made to open into press contact with each other in a connecting portion of the first and second fuel passages (13, 14), seal grooves (24A, 25A) of concentric circle form are applied to at least either of the first contact surface (24) and the second contact surface (25) by finish machining, thereby making it possible to suppress effectively the leakage of high-pressure fuel. The first contact surface (24) and the second contact surface (25) may be formed into concave shapes.