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Norman Y Hsu5586 Bandini Blvd, Bell, CA 90201

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Fuel Injector Nozzle

US Patent:
6491237, Dec 10, 2002
Filed:
Jun 12, 2000
Appl. No.:
09/591985
Inventors:
Edoardo Coppola - Long Beach CA
Norman Hsu - Rancho Palos Verdes CA
Assignee:
Hatch Kirk, Inc. - Seattle WA
International Classification:
B05M 5900
US Classification:
2395332, 2395337, 2395339, 2395855
Abstract:
A fuel injector nozzle is disclosed which solves a long-standing problem in the industry of reducing polluting engine emissions. The nozzle has a needle which alternately blocks and leaves open spray holes for delivering fuel to the combustion chamber. The needle is received in a cavity where the injector needle seats. Machining the seat of the cavity causes a sac at the nozzle tip where the unburned fuel causes the polluting emissions. Minimizing the sac volume minimizes the polluting emissions. The present invention discloses a nozzle formed with a seat having an apex located at the bottom of a sac. The design of the present minimizes the sac volume and the sac volume is closer to zero volume than any prior design.

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