Fuel injection valve for an internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTomojiro Sugimoto, Keiso Takeda
Life of this patent
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Abstract
A fuel jet adjusting plate has first nozzle holes arranged along a first circle coaxial with a central axis of a valve body and second nozzle holes arranged along a second circle coaxial with the central axis and having a diameter larger that the first circle. The second nozzle holes have an opening area smaller than that of the first nozzle holes. Thus, despite the fact that fuel flows at a lower rate upstream of inlet portions of the second nozzle holes than upstream of inlet portions of the first nozzle holes, it is possible to suitably atomize both the fuel spray injected through the first nozzle holes and the fuel spray injected through the second nozzle holes
Claims3
A fuel injection valve for an internal combustion engine, comprising:
- a valve body driven by a driving device between an open position and a closed position;
- a fuel jet adjusting plate for atomizing fuel injected when the valve body assumes the open position;
- a plurality of first nozzle holes formed in the fuel jet adjusting plate and arranged along a first circle coaxial with a central axis of the valve body;
- and
- a plurality of second nozzle holes formed in the fuel jet adjusting plate and arranged along a second circle coaxial with the central axis wherein a diameter of the second circle is larger than a diameter of the first circle, the second nozzle holes having an opening area smaller than an opening area of the first nozzle holes and wherein the valve bodv body is arranged so that, when the valve body assumes the open position, fuel flows across the fuel jet adjusting plate from a radially outer area toward the central axis.
Dependencies are inferred from the claim text.