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Dual mode fuel injection system and fuel injector for same

United States Patent

September 20, 2005
View the Complete Patent at the US Patent & Trademark Office
A fuel injection system has the ability to produce two different spray patterns depending on the positioning of a needle control valve member. Positioning of the needle control valve member determines which of the two needle control chambers are placed in a low pressure condition. First and second needle valve members have closing hydraulic surfaces exposed to fluid pressure in the two needle control chambers. The injector preferably includes a homogenous charge nozzle outlet set and a conventional nozzle outlet set controlled respectively, by the first and second needle valve members.
Lawrence; Keith E. (Peoria, IL), Tian; Ye (Bloomington, IL)
Caterpillar Inc (Peoria, IL)
10/ 310,701
December 5, 2002
GOVERNMENT RIGHTS This invention was made with U.S. Government support under DE-F05-00OR22806 awarded by the Department of Energy. The Government has certain rights in this invention.