Modular fuel injector having an electromagnetic actuator, an integral filter and an adjustment assembly

摘要

A fuel injector (100) having a fuel inlet, a fuel outlet, and a fuel passageway extending along an axis between the fuel inlet and the fuel outlet. The fuel injector includes a body (240) having an inlet portion, an outlet portion, and a neck portion disposed between the inlet portion and the outlet portion. An adjusting tube (280) is disposed within the neck portion of the body. A spring (270) is disposed within the neck portion of the body, the spring having an upstream end proximate to the adjusting tube (280) and a downstream end opposite the upstream end. A filter assembly (282) is disposed within the tube assembly to provide a reaction member for the spring (270). An armature (262) having a lower portion is disposed within the neck portion of the body and displaceable along the axis relative to the body. The downstream end of the spring (270) is disposed proximate to the armature (262), the spring (270) applying a biasing force to the armature. The armature has a special shape of the surface area facing the gap. A valve seal is substantially rigidly connected to the lower portion of the armature. The fuel injector (100) includes a modular valve group subassembly (200) that is connected to a modular coil group subassembly (300). <IMAGE> <IMAGE>