Fuel injector having non contacting valve closing orifice struct

Details Fuel injector having non contacting valve closing orifice struct Fuel injector having non contacting valve closing orifice struct

1996-12-09

1999-09-21

Miller, Carl S.

Internal-combustion engines

Charge forming device

Fuel injection system

2395339, 13761418, 123446, F02M 4100

Patent

active

059540338

ABSTRACT:
A fuel injector having a housing with a bore, a tip, and an orifice through the tip and a check having a first end, a second end, and a check guide portion reciprocatable in the bore between first and second positions which, respectively, obstruct and provide fluid communication through the orifice. The check and housing respectively have a primary check seat disposed between the first and second ends and a primary nozzle seat disposed nearer said check guide portion than said tip. The primary check seat being engageable with the primary nozzle seat with a first engagement force when the check is in its first position. The check and housing respectively preferably also include a secondary check seat and a secondary nozzle seat which are engageable with a second engagement force, less than the first engagement force, when the check is in its first position.
Having primary obstruction of fuel through the orifice by cooperating check seat and nozzle seat structures which are distally disposed relative to the tip provides a more reliable fuel injector and enables improved utilizing engine performance.

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