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公开(公告)号：US11578688B2
公开(公告)日：2023-02-14
申请号：US17546773
申请日：2021-12-09
Applicant: Walbro LLC
Inventor： Takashi Abei , Katsuaki Hamataka , Takashi Horikawa , Tomoya Kawada , Dairoku Suzuki , Jun Takano
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.
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公开(公告)号：US11231002B2
公开(公告)日：2022-01-25
申请号：US16621911
申请日：2018-06-15
Applicant: Walbro LLC
Inventor： Takashi Abei , Katsuaki Hamataka , Takashi Horikawa , Tomoya Kawada , Dairoku Suzuki , Jun Takano
Abstract: In at least some implementations, a charge forming device for a combustion engine includes a throttle body and a throttle valve. The throttle body has a throttle bore with an inlet through which air flows into the throttle bore and an outlet from which a fuel and air mixture exits the throttle bore. The throttle bore has a throat between the inlet and outlet and the throat has a reduced flow area compared to at least one of the inlet and outlet. The throttle valve has a valve head received within the throat of the throttle bore and movable relative to the throttle body between a first position and a second position wherein the flow area between the valve head and the throttle body is greater when the valve head is in the second position than in the first position.
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Patent Agency Ranking
公开(公告)号：US11802529B2
公开(公告)日：2023-10-31
申请号：US17869587
申请日：2022-07-20
Applicant: Walbro LLC
Inventor： Kazuki Doi , Naoya Kumagai , Dairoku Suzuki , Jun Takano
Abstract: A throttle body has a throttle bore with an inlet, an outlet and an air passage. A throttle valve has a valve head received within the throttle bore. A fuel metering valve is mounted on the throttle body and has a valve element and a fuel outlet, the valve element is movable relative to a valve seat to control fuel flow through the fuel outlet. And the nozzle body is carried by the throttle body and has a fuel passage and a feed passage. The fuel passage is arranged to receive fuel that exits the fuel outlet, and is communicated with a fuel chamber through which fluid flows into the throttle bore. The feed passage is communicated with the air passage and with the fuel passage upstream of the fuel chamber. Air in the feed passage is mixed with fuel in the fuel passage upstream of the fuel chamber.
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公开(公告)号：US20210010449A1
公开(公告)日：2021-01-14
申请号：US16977236
申请日：2019-03-14
Applicant: Walbro LLC
Inventor： Takashi Abei , Shunya Nakamura , Dairoku Suzuki , Jun Takano , Yuki Tanaka , Kazunori Tsubakino , Makoto Waku
Abstract: In at least some implementations, a method of controlling spark events in an engine includes determining for at least two engine revolutions in a four-stroke engine at least one characteristic of the primary coil voltage for a spark event, determining, based upon the characteristic of the primary coil voltage, which of the spark events is associated with a compression phase and which of the spark events is associated with an exhaust phase of engine operation, and providing spark events in subsequent engine revolutions that are associated with the compression phase of engine operation but not in revolutions associated with the exhaust phase of engine operation. In at least some implementations, the characteristic is the duration of the spark event as determined by changes in the primary coil voltage, and the characteristic may be that the duration that the primary coil voltage is above a threshold voltage.
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公开(公告)号：US20240018927A1
公开(公告)日：2024-01-18
申请号：US18373380
申请日：2023-09-27
Applicant: Walbro LLC
Inventor： Kazuki Doi , Naoya Kumagai , Dairoku Suzuki , Jun Takano
Abstract: A charge forming device for a combustion engine includes a throttle body having a throttle bore, an air passage having at least a portion in which air flows separate from the throttle bore and a throttle valve with a valve head movable relative to the throttle body. A nozzle body has a fuel passage and a feed passage, the fuel passage is arranged to receive fuel that exits a fuel outlet of a fuel metering valve, and the fuel passage is communicated with a fuel chamber through which fluid flows into the throttle bore, and the feed passage is communicated with the air passage to receive air from the air passage and the feed passage is communicated with the fuel passage upstream of the fuel chamber, wherein air in the feed passage is mixed with fuel in the fuel passage upstream of the fuel chamber.
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公开(公告)号：US20230021438A1
公开(公告)日：2023-01-26
申请号：US17869587
申请日：2022-07-20
Applicant: Walbro LLC
Inventor： Kazuki Doi , Naoya Kumagai , Dairoku Suzuki , Jun Takano
Abstract: A throttle body has a throttle bore with an inlet, an outlet and an air passage. A throttle valve has a valve head received within the throttle bore. A fuel metering valve is mounted on the throttle body and has a valve element and a fuel outlet, the valve element is movable relative to a valve seat to control fuel flow through the fuel outlet. And the nozzle body is carried by the throttle body and has a fuel passage and a feed passage. The fuel passage is arranged to receive fuel that exits the fuel outlet, and is communicated with a fuel chamber through which fluid flows into the throttle bore. The feed passage is communicated with the air passage and with the fuel passage upstream of the fuel chamber. Air in the feed passage is mixed with fuel in the fuel passage upstream of the fuel chamber.
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公开(公告)号：US20220099060A1
公开(公告)日：2022-03-31
申请号：US17546773
申请日：2021-12-09
Applicant: Walbro LLC
Inventor： Takashi Abei , Katsuaki Hamataka , Takashi Horikawa , Tomoya Kawada , Dairoku Suzuki , Jun Takano
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.
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