| 摘要 |
A fuel injector is described that includes a polymeric housing, pole piece, filter assembly, coil assembly, spring member, armature assembly and metering assembly. The housing has a passageway extending between an inlet opening and an outlet opening along a longitudinal axis. The pole piece is disposed in the passageway and has a through opening. The filter assembly has a portion disposed in the through opening of the pole piece. The coil assembly is disposed in the housing to surround the pole piece. The spring member is disposed partly in the pole piece and includes a spring portion contiguous with the portion of the filter assembly. The armature assembly is disposed in the passageway in a first position confronting the end face of the pole piece and in a second position contiguous to an end face of the pole piece. The metering assembly has a seat secured to a polymeric support member. The seat has a first surface contiguous to the closure member in one position of the closure member and a second surface spaced apart from the first surface. The metering disc is secured to the second surface of the seat such that the metering disc is at the outermost end of the fuel injector.
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