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US 10,344,727 B2Granted
Electromagnetic fuel injection valve for in-cylinder injection
AssigneeKelhin Corporation
InventorsMichihiro Takahashi, Hironori Hashimoto
Life of this patent
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Abstract
In an electromagnetic fuel injection valve for in-cylinder injection, a fuel injection hole is an elongated hole having a major axis and a minor axis, the major axis being curved into an arc shape having a radius that is smaller than a radius of a pitch circle of an inlet of the fuel injection hole. Accordingly, the electromagnetic fuel injection valve can ensure a required flow rate even when a penetrating power is decreased.
Claims4
An electromagnetic fuel injection valve for in-cylinder injection comprising:
- a valve seat member that has a valve seat and a plurality of fuel injection holes arranged in a ring shape and that injects fuel through the fuel injection holes, and
- a valve body that opens and closes the fuel injection holes in cooperation with the valve seat,
- wherein each of the fuel injection holes is an elongated hole having a major axis and a minor axis, the major axis being curved into an arc shape having a radius that is smaller than a radius of a pitch circle of an inlet of each of the fuel injection holes,
- each of the fuel injection holes is formed from a large diameter wall having a radius that is larger than the radius of the major axis, a small diameter wall having a radius that is smaller than the radius of the major axis, and connecting walls that connect the large diameter wall and the small diameter wall, and
- at least some of the fuel injection holes are each arranged such that the major axis intersects with an inner peripheral wall of the fuel injection hole at two intersection points and one of the intersection points is present on a radially outer side of the pitch circle while the other of the intersection points is present on a radially inner side of the pitch circle.
2 more elements
Dependencies are inferred from the claim text.