Fuel pump control valve assembly

Details Fuel pump control valve assembly Fuel pump control valve assembly

1999-07-30

2000-05-09

Freay, Charles G.

Pumps

Expansible chamber type

Electrically or magnetically actuated distributor

251 50, 251 64, F04B 700

Patent

active

060595450

ABSTRACT:
A fuel pump or injector has a control valve with a piston valve body axially movable over a motion displacement interval defined by first and second sub-intervals. A first control valve spring causes the piston valve body to be biased toward the unactuated position whenever the piston valve body is in the first sub-interval. A second control valve spring causes the piston valve body to be biased into damped engagement with the valve stop whenever the piston valve body is in the second sub-interval.

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