Fuel injection valve

Details Fuel injection valve Fuel injection valve

F - Mech Eng,Light,Heat,Weapons

02

M

F02M 61/10 (2006.01) F02M 45/08 (2006.01) F02M 51/06 (2006.01) F02M 61/08 (2006.01) F02M 61/18 (2006.01) F02M 63/00 (2006.01)

Patent

CA 2473639

A fuel injection valve is provided for introducing a fuel into an engine and controlling fuel flow to reduce variability between injection events. The fuel injection valve employs an arrangement for a valve nozzle that cooperates with a valve needle. The valve needle and the valve body are shaped to cooperatively provide a constant flow area between the valve needle and the valve body. The constant flow area restricts flow through the nozzle so that mass flow rate is substantially constant for a range of valve needle movement within a predetermined range of needle movement. The method comprises commanding a valve needle to a position within the predetermined range of needle movement to reduce variability in the fuel mass flow rate, particularly when the engine is idling or operating under low load conditions. This improves injection consistency, thereby stabilizing engine operation, decreasing emissions, and increasing efficiency.

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