Patent Number: 6,168,098

Title: Fuel injector with tubular lower needle guide

Abstract: A solenoid actuated fuel injector comprises a valve body having a longitudinal axis. A valve seat subassembly is mounted in one end of the valve body. The valve seat subassembly includes a valve seat having a seating surface and a circumferential sealing surface surrounding the seating surface. The valve seat subassembly also includes a lower needle guide and swirl disk welded to the valve seat. The lower guide includes a flange portion and a tube portion having an axially disposed tubular bore for guiding the needle in a tight tolerance relationship. The tubular bore provides a longer length interface with the needle and a smoother wear surface than a conventional pierced hole thin lower guide.

Inventors: Brinn, Jr.; Benjamin F. (Williamsburg, VA)

Assignee: Siemens Automotive Corporation

International Classification: F02M 61/00 (20060101); F02M 61/16 (20060101); F02M 61/12 (20060101); F02M 61/18 (20060101); F02M 51/06 (20060101); F02M 059/00 ()

Expiration Date: 01/02/2018