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US 6,142,392 AGranted
Fuel injector for an internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKeiso Takeda, Tomojiro Sugimoto
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AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKeiso Takeda, Tomojiro Sugimoto
Estimating the term…
In a fuel injector for an internal combustion engine having an injection hole, a valve body, and a fuel reservoir on the downstream side of a seat portion of the valve body, the width of the injection hole is gradually narrowed inward at a predetermined included angle, an opening on the outer side of the injection hole has a width sufficiently larger than the height thereof. The tip of the fuel reservoir is communicated with the injection hole via a passage portion which has a uniform cross section. On each transverse plane within the height of the injection hole, the tip of the fuel reservoir has an arc shape, on the transverse plane passing through the center of the height of the injection hole, the tip of the fuel reservoir has a hemicircle shape and the vertex of the predetermined included angle is located on the upstream side of the center of the hemicircle shape.
A fuel injector for an internal combustion engine, comprising an injection hole, a valve body, and a fuel reservoir on the downstream side of a seat portion of said valve body, wherein the width of said injection hole is gradually narrowed inward at a predetermined included angle, an opening on the outer side of said injection hole has a width sufficiently larger than the height thereof, a tip portion of said fuel reservoir is communicated with said injection hole via a passage portion which has a uniform cross section, on each transverse plane within said height of said injection hole, said tip portion of said fuel reservoir has an arc shape, on the transverse plane passing through the center of said height of said injection hole, said tip portion of said fuel reservoir has a hemicircle shape and the vertex of said predetermined included angle is located on the upstream side of the center of said hemicircle shape.
Dependencies are inferred from the claim text.