Fuel injector method and apparatus

Details Fuel injector method and apparatus Fuel injector method and apparatus

1990-08-03

1991-01-29

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

Fuel injection system

123446, 239464, 239253, F02M 4100

Patent

active

049878875

ABSTRACT:
One spring and two spring embodiments of a fuel injector having a nozzle body and needle valve with cooperating inner and outer metering rings providing a metering passage which (a) meters fuel at a reduced rate during an initial increment of valve lift, (b) assists in maintaining fuel pressure at the valve seat to reduce fuel dribble and cavitation erosion during a corresponding last increment of valve closure and (c) dampens secondary pressure waves to prevent secondary fuel injection.

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