Siemens Automotive Corporation

Dennis E Rooker

Edward J Nemie, Jr

J Michael Joseph

A method of inserting an injector in a test head includes inserting the injector in a puck; aligning the puck beneath the test head; engaging a bottom of the puck with a floating cone assembly; raising the puck upwards towards the test head; and inserting a top portion of the injector into the test head. The floating locator cone assembly includes a floating locator cone mount; a ball thrust bearing assembly inserted in the floating locator cone mount; and a floating locator cone inserted in the floating locator cone mount on top of the ball thrust bearing. Use of the floating locator cone assembly allows the puck to center itself thereby allowing the injector to be properly aligned upon insertion in the test head. Proper alignment of the injector reduces false leak test readings and the consequent rejection of good injectors.

Method and apparatus for aligning and inserting a fuel injector in a test head

A method and apparatus for defining a spray pattern to reduce the variation in the metering, targeting, distribution, and atomization of the fuel output of a fuel injector. The fuel injector contains a closure member extending along the longitudinal axis of the injector. The closure member can be positioned contiguous to a seat to occlude fuel flow. A sealing radius is defined when the closure member is in this position. The closure member can also be positioned such that it is not contiguous to the seat, thereby permitting fuel flow. A plate is disposed proximate to the seat with a first and second face, the first face facing the seat. An inlet is located on the first face of the plate, and at least one chamber is disposed on the second face of the plate. The inlet and the at least one chamber are in fluid communication. An orifice disc is disposed in a confronting arrangement with the second face of the plate such that each chamber is located proximal to each orifice. The orifice disc is positioned such that its axis is generally coincident with the longitudinal axis of the fuel injector. At least one orifice is located at a second radius from the axis of the orifice disc, wherein the second radius is greater than the sealing radius.

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Williamsburg, VA, United States of America

Dennis E Rooker