| 摘要 |
A fuel injector housing having a main body portion and a tip portion is disclosed. The main body portion has a chamber defined therein in which fuel injector components may be positioned. The tip portion has a nozzle defined therein. The nozzle has a passageway extending therethrough which is in fluid communication with the chamber. The nozzle is prepared by a process including the step of focusing a laser beam so that its focal point is located substantially on an outer surface of the tip portion for a first period of time sufficient to create the passageway whereby the nozzle is formed and a waste product is deposited at a periphery of the passageway. The process further includes the step of creating a first prepassageway which extends though the tip portion of the housing, the first prepassageway defining a first substantially cylindrically-shaped channel having a first diameter. The process still further includes the step of creating a second prepassageway which extends though the tip portion of the housing, the second prepassageway defining a second substantially cylindrically-shaped channel having a second diameter which is greater than the first diameter. The process yet further includes the step of refocusing the laser beam so that its focal point is located above the outer surface for a second period of time sufficient to disintegrate the waste product.
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