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US 2004/0069873 A1Published application
Fuel injection device having injection hole plate
AssigneeDenso Corporation
InventorsYasuhide Tani, Kimitaka Saito, Nobuo Ota, Yoshitaka Wakamatsu, Hitoshi Shibata, Masaaki Konishi
Life of this patent
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Abstract
A nozzle holder includes a support portion, which supports a downstream end surface of a planar wall of an injection hole plate. The injection hole plate provided with injection holes is welded to one of the valve body and the nozzle holder. The planar wall may be curved and may be thus convex in an upstream direction toward a downstream end opening such that the planar wall is urged against a peripheral edge of the downstream end opening of the valve body. The planar wall may include a reinforcing rib located radially outward of the injection hole.
Claims33
A fuel injection device comprising:
- a valve body that includes:
- a downstream end opening;
- a fuel passage communicated with the downstream end opening;
- and
- a valve seat located adjacent to the downstream end opening;
- a valve member that is located radially inward of the valve body and is seatable against the valve seat of the valve body;
- an injection hole plate that includes a cover wall, which covers the downstream end opening of the valve body, wherein the cover wall includes at least one injection hole formed through the cover wall;
- and
- a nozzle holder that receives the valve body, wherein:
- the nozzle holder includes a support portion, which supports a downstream end surface of the cover wall of the injection hole plate;
- and
- the injection hole plate is welded to one of the valve body and the nozzle holder.
9 more elements
A fuel injection device comprising:
- a valve body that includes:
- a downstream end opening;
- a fuel passage communicated with the downstream end opening;
- and
- a valve seat located adjacent to the downstream end opening;
- a valve member that is located radially inward of the valve body and is seatable against the valve seat of the valve body;
- an injection hole plate that includes a cover wall, which covers the downstream end opening of the valve body, wherein the cover wall includes at least one injection hole formed through the cover wall;
- and
- a nozzle holder that receives the valve body, wherein:
- the nozzle holder includes a support portion, which supports a downstream end surface of the cover wall of the injection hole plate;
- and
- the cover wall of the injection hole plate is curved and is thus convex in an upstream direction toward the downstream end opening such that the cover wall is urged against a peripheral edge of the downstream end opening of the valve body.
9 more elements
A fuel injection device comprising:
- a valve body that includes:
- a downstream end opening;
- a fuel passage communicated with the downstream end opening;
- and
- a valve seat located adjacent to the downstream end opening;
- a valve member that is located radially inward of the valve body and is seatable against the valve seat of the valve body;
- an injection hole plate that includes a cover wall, which covers the downstream end opening of the valve body, wherein the cover wall includes at least one injection hole formed through the cover wall;
- and
- a nozzle holder that receives the valve body, wherein:
- the nozzle holder includes a support portion, which supports a downstream end surface of the cover wall of the injection hole plate;
- the cover wall of the injection hole plate includes a thin wall portion and a thick wall portion, wherein the thin wall portion covers the downstream end opening of the valve body, and the thick wall portion is formed around the thin wall portion;
- and
- the at least one injection hole is formed through the thin wall portion of the cover wall.
10 more elements
A fuel injection device comprising:
- a valve body that includes:
- a downstream end opening;
- a fuel passage communicated with the downstream end opening;
- and
- a valve seat located adjacent to the downstream end opening;
- a valve member that is located radially inward of the valve body and is seatable against the valve seat of the valve body;
- and
- an injection hole plate that includes a cover wall, which covers the downstream end opening of the valve body, wherein the cover wall includes at least one injection hole formed through the cover wall, wherein:
- the cover wall includes a reinforcing rib located radially outward of the injection hole;
- and
- a portion of the cover wall, which has a projecting length smaller than that of the reinforcing rib, is welded to the valve body.
8 more elements
Dependencies are inferred from the claim text.