DEPOSIT CONTROL IN FUEL INJECTOR NOZZLES

• Main Authors: MURDOCH, PETER, JOHN, FREW, ROBERT, WALTER, CARLISLE, HUGH, WILLIAM, MILLS, JOHN, RICHARD
• Format: Patent
• Language: English; French; German
• Published: 21.10.2009
• Edition: 7
• Subjects: BLASTING; COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

An injector nozzle for a fuel injected internal combustion engine, said injector nozzle including a port ( 5 ) having a valve seat surface ( 15 ) and a valve member ( 3 ) having a seating surface ( 17 ), said valve member ( 3 ) being movable relative to the port ( 5 ) to respectively provide a nozzle passage ( 6 ) between the valve seat surface ( 15 ) and the seating surface ( 15 ) for the delivery of fuel therethrough or sealed contact therebetween to prevent said delivery of fuel, the valve member ( 3 ) including an outer valve surface ( 18 ) located adjacent the seating surface and external to the port, wherein a sharp edge ( 25 ) is provided on the valve member ( 3 ) at the transition between the seating surface ( 17 ) and the outer valve surface ( 18 ) thereby for controlling the formation of deposits at or adjacent an exit of the nozzle passage ( 6 ).