Fuel injector

Details Fuel injector Fuel injector

2005-05-10

2005-05-10

Mar, Michael (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Fluid pressure responsive discharge modifier* or flow...

Fuel injector or burner

C239S088000, C239S585500

Reexamination Certificate

active

06889918

ABSTRACT:
A fuel injector including a control valve arrangement for controlling fuel pressure within a control chamber comprises a control valve member which is movable between a first position in which the control chamber communicates with a source of high pressure fuel and a second position in which the control chamber communicates with a low pressure fuel drain and communication between the control chamber and the source of high pressure fuel is broken. The control valve arrangement includes a restricted flow path for restricting the rate of flow of fuel from the source of high pressure fuel to the control chamber when the control valve member is moved towards its first position. The provision of the restricted flow path prevents unbalanced hydraulic forces acting on the control valve member when it moves towards its first position, which can otherwise lead to valve needle dither between injecting and non-injecting states.

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