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US 11,578,688 B2Granted
Fuel and air charge forming device
AssigneeWalbro Corporation
InventorsTakashi Abei, Katsuaki Hamataka, Takashi Horikawa, Tomoya Kawada, Dairoku Suzuki, Jun Takano
Life of this patent
Estimating the term…
Abstract
In at least some implementations, a fuel metering valve, includes a bobbin defining a passage and having one or more voids in the surface of the bobbin that defines the passage, aa wire coil around the bobbin and an armature. The armature is received within the passage in the bobbin and movable relative to the bobbin from a first position to a second position when electricity is supplied to the wire coil.
Claims14
A fuel metering valve, comprising:
- a bobbin defining a passage and having one or more voids in the surface of the bobbin that defines the passage;
- a wire coil around the bobbin;
- and
- an armature received within the passage in the bobbin and movable relative to the bobbin from a first position to a second position when electricity is supplied to the wire coil, wherein said one or more voids extend radially outwardly relative to an axis of the passage and a contact portion is defined circumferentially spaced from said one or more voids and the contact portion is slidably engaged by the armature as the armature moves relative to the bobbin.
1 more element
A fuel metering valve, comprising:
- a bobbin having an inner surface that defines a passage, the bobbin having a valve seat at one end of the passage, the valve seat having a portion that is radially smaller than a diameter of the passage, and the bobbin having one or more voids in the inner surface of the bobbin;
- a wire coil around the bobbin;
- and
- an armature received within the passage in the bobbin and movable relative to the bobbin from a first position to a second position when electricity is supplied to the wire coil, wherein in one of the first position or the second position the armature engages the valve seat and in the other position the armature is spaced from the valve seat, and wherein the armature slidably engages a portion of the inner surface that is circumferentially spaced from said one or more voids, and said one or more voids extend radially outwardly relative to an axis of the passage such that the one or more voids provide an area of the inner surface that is radially spaced farther from the armature than is the inner surface.
1 more element
Dependencies are inferred from the claim text.