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US 7,124,966 B2Granted
Fuel injector check valve
AssigneeHaynes Corporation
InventorEdward A. Schlairet
Life of this patent
Estimating the term…
Abstract
A high pressure unit fuel injector includes a member with a fuel delivery opening to be intermittently supplied with high pressure fuel and a valve seat encircling the fuel delivery opening. A valve cage includes a check-valve chamber adjacent the valve seat. The chamber includes an annular ledge facing the valve seat and an inwardly facing wall surrounding the ledge. A disk is located within the chamber and has opposite first and second faces alternately seatable against the valve seat and the ledge respectively. The disk has a plurality of openings between the first and second faces and a circular-shaped groove formed in the first face about a center of the disk. The groove intersects the plurality of openings.
Claims21
A high pressure unit fuel injector comprising:
- a member with a fuel delivery opening to be intermittently supplied with high pressure fuel and a valve seat encircling the fuel delivery opening;
- a valve cage including a check-valve chamber adjacent the valve seat;
- wherein the check-valve chamber includes an annular ledge facing the valve seat and an inwardly facing wall surrounding the ledge;
- a check-valve disk movable within the check-valve chamber between the valve seat and the annular ledge and having opposite first and second faces alternately seatable against the valve seat and the ledge respectively;
- wherein the disk has an outer edge in opposed relation to the wall and having limited radial clearance therefrom when centered in the check-valve chamber;
- wherein the disk has a plurality of openings between the first and second faces for passage of fuel past the disk;
- wherein the disk has a groove formed in the first face;
- and
- wherein the groove is located about the fuel delivery opening to provide a flow path from the fuel delivery opening to the plurality of openings, for even and steady movement of the disk as it breaks away form the valve seat.
6 more elements
A high pressure unit fuel injector comprising:
- a member with a fuel delivery opening to be intermittently supplied with high pressure fuel and a valve seat encircling the fuel delivery opening;
- a valve cage including a check-valve chamber adjacent the valve seat;
- wherein the check-valve chamber includes an annular ledge facing the valve seat and an inwardly facing wall surrounding the ledge;
- a disk within the check-valve chamber and having opposite first and second faces alternately seatable against the valve seat and the ledge respectively;
- wherein the disk has an outer edge in opposed relation to the wall and having limited radial clearance therefrom when centered in the check-valve chamber;
- wherein the disk has a plurality of openings between the first and second faces;
- wherein the disk has a groove formed in the first face;
- and
- wherein the groove is arcuate in cross-section.
6 more elements
A high pressure unit fuel injector comprising:
- a member with a fuel delivery opening to be intermittently supplied with high pressure fuel and a valve seat encircling the fuel delivery opening;
- a valve cage including a check-valve chamber adjacent the valve seat;
- wherein the check-valve chamber includes an annular ledge facing the valve seat and an inwardly facing wall surrounding the ledge;
- a check-valve disk movable within the check-valve chamber between the valve seat and the annular ledge and having opposite first and second faces alternately seatable against the valve seat and the ledge respectively;
- wherein the disk has an outer edge in opposed relation to the wall and having limited radial clearance therefrom when centered in the check-valve chamber;
- wherein the disk has a plurality of openings between the first and second faces for passage of fuel past the disk;
- wherein the disk has a circular-shaped groove formed in the first face about a center of the disk;
- wherein the groove intersects the plurality of openings and is located radially outward of the fuel delivery;
- and
- wherein the groove is provides a generally equal flow path from the fuel delivery opening to the plurality of openings, for even and steady movement of the disk as it breaks away form the valve seat.
7 more elements
A high pressure unit fuel injector comprising:
- a member with a fuel delivery opening to be intermittently supplied with high pressure fuel and a valve seat encircling the fuel delivery opening;
- a valve cage including a check-valve chamber adjacent the valve seat;
- wherein the check-valve chamber includes an annular ledge facing the valve seat and an inwardly facing wall surrounding the ledge;
- a disk within the check-valve chamber and having opposite first and second faces alternately seatable against the valve seat and the ledge respectively;
- wherein the disk has an outer edge in opposed relation to the wall and having limited radial clearance therefrom when centered in the check-valve chamber;
- wherein the disk has a plurality of openings between the first and second faces;
- wherein the disk has a circular-shaped groove formed in the first face about a center of the disk;
- wherein the groove intersects the plurality of openings and is located radially outward of the fuel delivery opening;
- and
- wherein the groove is arcuate in cross-section.
7 more elements
Dependencies are inferred from the claim text.