Fluid seal for cyclic high pressures within a fuel injector

Details Fluid seal for cyclic high pressures within a fuel injector Fluid seal for cyclic high pressures within a fuel injector

1997-11-03

1999-05-11

Miller, Carl S.

Internal-combustion engines

Charge forming device

With fuel pump

123506, 92168, F02M37/04

Patent

active

059016868

ABSTRACT:
A cyclic high pressure fluid seal for a fuel injector includes an injector body that defines a cyclic high pressure space connected to a low pressure space by a bore. A member with a pressure face end and a side surface is mounted to reciprocate in the bore between a retracted position and an advanced position. An O-ring is positioned in contact with the side surface of the member and the injector body within the bore. A portion of the member and the bore define a pressure accumulation volume positioned between the O-ring and the pressure face end. The pressure accumulation volume is positioned such that fluid pressure in the pressure accumulation volume changes with that of the cyclic high pressure space.

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