초록 ▼

A method is described for matching the lands in a spool valve (300) for a fuel injector. The spool valve (300) has a valve body (340) forming an inside surface (373) to receive the spool (310). The inside surface is measured to locate the position of contact points on the valve body (340). A startin

A method is described for matching the lands in a spool valve (300) for a fuel injector. The spool valve (300) has a valve body (340) forming an inside surface (373) to receive the spool (310). The inside surface is measured to locate the position of contact points on the valve body (340). A starting contact point (514) is selected from the contact points on the valve body (340). The starting contact point (514) is transposed to the spool (310). The other contact points are transposed to the spool (300), preferably by using the distances between the other contact points and the starting contact point on the valve body. Grind areas are identified on the spool (310) based on the starting contact point, the other contact points, and specifications for the spool. The grind areas are ground to form lands on the spool (310) that match lands on the valve body (340). Alternatively, the lands on the valve body (340) are made based on the contact points of the spool (310)

대표청구항 ▼

[ What is claimed is:] [1.] A method for matching lands in a spool valve for a fuel injector, wherein the spool valve has a valve body forming an inside surface having an inside diameter to receive a spool having outside diameter, specifications defining the inside surface of the valve body, the val

[ What is claimed is:] [1.] A method for matching lands in a spool valve for a fuel injector, wherein the spool valve has a valve body forming an inside surface having an inside diameter to receive a spool having outside diameter, specifications defining the inside surface of the valve body, the valve body having a contact point at a location where a body land connects with a spool land formed by a spool groove on the spool, the method comprising the steps of:(a) measuring the inside surface;(b) determining the location of the contact point on the valve body;(c) identifying a grind area on the spool based on the location of the contact point on the valve body; and(d) grinding the grind area to form the spool groove and the spool land.