Patents by Inventor Akihiro SHIMAMURA
Akihiro SHIMAMURA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11867124Abstract: A fuel supply control device (10) is configured to generate an operation amount used for feedback-controlling rotation of a gear pump (3) based on a deviation of a detected fuel flow rate with respect to a target flow rate, wherein the fuel supply control device generates the operation amount such that a rotation speed of the gear pump is equal to or greater than a predetermined lower limit rotation speed Nmin so as to protect a bearing of the gear pump.Type: GrantFiled: December 26, 2019Date of Patent: January 9, 2024Assignee: IHI CorporationInventors: Akihiro Shimamura, Naoki Seki, Hirotaka Sugawara, Yasuhiko Yamamoto
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Patent number: 11732711Abstract: In an external gear pump, a first bushing of a rotational shaft of a first gear has a second surface facing to a first surface of a pump body. A recess for supplying high-pressure lubricating oil between an inner circumferential surface of the first bushing and an outer circumferential surface of the rotational shaft is opened on the inner circumferential surface within a low pressure range associating with an inlet chamber of fluid. A bushing-side supply passage for supplying the high-pressure lubricating oil to the recess is formed within the first bushing. A bushing-side inlet port of the bushing-side supply passage is opened on the second surface within a high pressure range associating with an outlet chamber of the fluid. A body-side supply passage for supplying the high-pressure lubricating oil to a body-side supply port opened on the first surface is formed within the pump body.Type: GrantFiled: July 28, 2021Date of Patent: August 22, 2023Assignee: IHI CorporationInventors: Masahiro Tanida, Takashi Sato, Kenji Takamiya, Akihiro Shimamura, Naoki Seki
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Publication number: 20230184247Abstract: A gear bearing structure for an external gear pump includes a driving gear and the driven gear accommodated rotatably in a pump body of the external gear pump, an inlet chamber formed on one side of a mesh portion of the driving gear and the driven gear, an outlet chamber formed on the other side of the mesh portion, a hollow cylindrical bushing for holding a rotational shaft of the driving gear or the driven gear with a lubricating liquid film formed between itself and the rotational shaft, and a ring plate spring disposed between the pump body and the bushing to urge the bushing so as to slidably contact with a side face of the one of the driving gear and the driven gear.Type: ApplicationFiled: February 6, 2023Publication date: June 15, 2023Applicant: IHI CorporationInventors: Masahiro TANIDA, Kenji TAKAMIYA, Yasuyoshi UMEKI, Akihiro SHIMAMURA
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Patent number: 11365683Abstract: A fuel supply control device is provided in which a parallel flow path of an orifice and a pressurizing valve is used as a complex pressurizing valve for a fuel supply amount, and which controls a fuel supply pump on the basis of a pressure difference before and after the complex pressurizing valve that has been detected by a pressure difference meter. When the rotational speed of the fuel supply pump is below a predetermined threshold value, the fuel supply pump is controlled on the basis of a first fuel measurement amount, and the fuel supply pump is controlled on the basis of a second fuel measurement amount.Type: GrantFiled: September 2, 2020Date of Patent: June 21, 2022Assignee: IHI CORPORATIONInventors: Naoki Seki, Yasuhiko Yamamoto, Akihiro Shimamura
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Publication number: 20220128006Abstract: A fuel supply control device (10) is configured to generate an operation amount used for feedback-controlling rotation of a gear pump (3) based on a deviation of a detected fuel flow rate with respect to a target flow rate, wherein the fuel supply control device generates the operation amount such that a rotation speed of the gear pump is equal to or greater than a predetermined lower limit rotation speed Nmin so as to protect a bearing of the gear pump.Type: ApplicationFiled: December 26, 2019Publication date: April 28, 2022Applicant: IHI CorporationInventors: Akihiro SHIMAMURA, Naoki SEKI, Hirotaka SUGAWARA, Yasuhiko YAMAMOTO
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Publication number: 20210355939Abstract: In an external gear pump, a first bushing of a rotational shaft of a first gear has a second surface facing to a first surface of a pump body. A recess for supplying high-pressure lubricating oil between an inner circumferential surface of the first bushing and an outer circumferential surface of the rotational shaft is opened on the inner circumferential surface within a low pressure range associating with an inlet chamber of fluid. A bushing-side supply passage for supplying the high-pressure lubricating oil to the recess is formed within the first bushing. A bushing-side inlet port of the bushing-side supply passage is opened on the second surface within a high pressure range associating with an outlet chamber of the fluid. A body-side supply passage for supplying the high-pressure lubricating oil to a body-side supply port opened on the first surface is formed within the pump body.Type: ApplicationFiled: July 28, 2021Publication date: November 18, 2021Applicant: IHI CorporationInventors: Masahiro TANIDA, Takashi SATO, Kenji TAKAMIYA, Akihiro SHIMAMURA, Naoki SEKI
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Publication number: 20200400074Abstract: A fuel supply control device is provided in which a parallel flow path of an orifice and a pressurizing valve is used as a complex pressurizing valve for a fuel supply amount, and which controls a fuel supply pump on the basis of a pressure difference before and after the complex pressurizing valve that has been detected by a pressure difference meter. When the rotational speed of the fuel supply pump is below a predetermined threshold value, the fuel supply pump is controlled on the basis of a first fuel measurement amount, and the fuel supply pump is controlled on the basis of a second fuel measurement amount.Type: ApplicationFiled: September 2, 2020Publication date: December 24, 2020Applicant: IHI CORPORATIONInventors: Naoki SEKI, Yasuhiko YAMAMOTO, Akihiro SHIMAMURA