| 摘要 |
A fuel injector having a body (12) with an axial interior cavity (36). A valve assembly (46) is axially reciprocable in the cavity (36). A fuel inlet (38) is provided at one end of the cavity (36) and an outlet (34) is provided at the other end. The outlet (34) defines a cylindrical outlet bore (52) in which is closely fitted a cylindrical end portion (50) of a valve member (48) forming part of valve assembly (46). Valve member (48) also has a shank (59) connected to end portion (50) by a somewhat tapered portion (58). Shank (59) extends from outlet (34) into cavity (36) and, in an inoperative condition of the injector, the valve member (48) is resiliently biased so that portion (58) thereof is adjacent a somewhat tapered annular valve seat (66) in outlet (34) adjacent cavity (36). Pressure of fuel admitted to cavity (36) via inlet (38) acts on the valve member (48) to move it against the resilient bias applied thereto to permit fuel flow from the cavity (36) and past valve seat (66). Fuel so passing is ejected from the outlet (34) via grooves (50a) extending along the outer surface of the cylindrical end portion (50) of the valve member (48). |
