Fluid sprinkling – spraying – and diffusing – Fluid pressure responsive discharge modifier* or flow... – Fuel injector or burner
Patent
1998-08-07
2000-07-25
Douglas, Steven O.
Fluid sprinkling, spraying, and diffusing
Fluid pressure responsive discharge modifier* or flow...
Fuel injector or burner
239 88, 2395338, F02M 5900
Patent
active
060927445
ABSTRACT:
A fuel injector includes an injector body that defines a low pressure space, a trapped volume and a fuel pressurization chamber in fluid communication with a nozzle outlet. A needle valve member is positioned in the injector body and moveable between an inject position in which the fuel pressurization chamber is open to the nozzle outlet, and a closed position in which the nozzle outlet is blocked to the fuel pressurization chamber. The needle valve member includes a lifting hydraulic surface exposed to fluid pressure in the fuel pressurization chamber, and a closing hydraulic surface exposed to fluid pressure in the trapped volume. At least one of the needle valve member and the injector body define a pressure release passage extending between the trapped volume and the low pressure space. A pressure regulating valve is positioned in the pressure release passage, and has a regulating valve member that is moveable to an open position when fluid pressure in the trapped volume is above pop-off pressure.
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Caterpillar Inc.
Douglas Steven O.
Le Huyen
McNeil Michael B.
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