Reagent Injector

摘要

An injector for injecting a reagent into an exhaust stream includes an outer tube extending through an electromagnet and surrounding an inner tube. A first end of the inner tube is sealingly fixed to an inner surface of the outer tube. A guide member and an orifice plate are each sealingly fixed to the inner surface of the outer tube. A second end of the inner tube is aligned by the guide member. A moveable valve member includes a pintle head guided by the inner surface of the outer tube to align the valve member with an orifice extending through the orifice plate.

主权项

1. An injector for injecting a liquid, comprising:
an electromagnet; an inner tube including a substantially constant wall thickness; an outer tube including a substantially constant wall thickness, the outer tube extending through the electromagnet and surrounding the inner tube; a guide member positioned within the outer tube; a slot disc including asymmetrically shaped swirl slots, the slot disc being positioned within the outer tube and in contact with the guide member, the guide member including circumferentially spaced apart inlet ports in communication with the swirl slots, the inlet ports and the asymmetrical swirl slots being adapted for alignment with each other by an asymmetrical tool, wherein the guide member and the slot disc are fixed to the outer tube after alignment with each other by the tool; and a moveable valve member extending through the inner tube.