US 2007/0175451 A1 · Fuel injector isolation seat

Abstract

An isolation seat assembly for a fuel injector that is at least partially disposed within a stepped bore defined by a cylinder head, the stepped bore includes a land. The isolation seat assembly includes a cupped spring washer and an elastomeric ring member disposed between the cupped spring washer and the land. The isolation seat assembly operates to bias the fuel injector away from the land to substantially isolate the fuel injector from the head. The cupped spring washer and elastomeric ring member may be bonded to one another. Additionally, the isolation seat assembly may include a washer member between the elastomeric ring member and the land. The washer member operates to distribute axial forces from the fuel injector to the land. At least a portion of the washer member may be crimped into engagement with the cupped spring washer, thereby capturing the elastomeric ring member therein between.

Claims18

Dependent claims

An isolatable fuel delivery system adapted for combination with a cylinder head defining a generally stepped injector bore having a land, the isolatable fuel delivery system comprising:

a fuel rail;
a fuel injector;
wherein said fuel rail is operable to provide pressurized fuel to said fuel injector;
wherein said fuel injector is at least partially disposable within the generally stepped injector bore;
a fuel injector isolation seat assembly, said fuel injector isolation seat assembly being operatively disposable between said fuel injector and the land;
wherein said fuel injector isolation seat assembly includes a spring washer and an elastomeric ring member;
and
wherein said fuel injector isolation seat assembly is operable to bias said fuel injector away from the land to substantially isolate said fuel injector from the head.

5 more elements

An isolated direct injection fuel delivery system comprising:

a fuel rail;
a direct injection fuel injector;
wherein said fuel rail is operable to provide pressurized fuel to said direct injection fuel injector;
wherein said direct injection fuel injector is at least partially disposed within a generally stepped injector bore, said generally stepped injector bore being defined by a cylinder head;
wherein said generally stepped injector bore includes a land;
a fuel injector isolation seat assembly, said fuel injector isolation seat assembly being operatively disposed between said direct injection fuel injector and said land;
wherein said fuel injector isolation seat assembly includes a cupped spring washer and an elastomeric ring member;
and
wherein said fuel injector isolation seat assembly is operable to bias said direct injection fuel injector away from said land to substantially isolate said direct injection fuel injector from said head.

6 more elements

Dependencies are inferred from the claim text.

Fuel injector isolation seat

Life of this patent

Fuel injector isolation seat

Life of this patent

Abstract

Claims18