Patents by Inventor Masayoshi DOUI
Masayoshi DOUI 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: 11739684Abstract: An engine including an exhaust bypass valve and an intake bypass valve. The exhaust bypass valve is disposed in an exhaust bypass channel connecting an outlet of an exhaust manifold and an exhaust outlet of a turbocharger to each other. The intake bypass valve is disposed in an intake bypass channel connecting an inlet of an intake manifold and an inlet of the turbocharger. An intake pressure sensor detects a pressure of the intake manifold. If an instruction value indicating an upper limit or a lower limit of the valve opening degree of the intake bypass valve is continuously output for a predetermined time or more, an engine control device determines that an abnormality occurs in at least one of the exhaust bypass valve and the intake bypass valve.Type: GrantFiled: October 6, 2022Date of Patent: August 29, 2023Assignee: Yanmar Power Technology Co., Ltd.Inventors: Taishi Murakami, Masayoshi Doui
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Patent number: 11598272Abstract: An engine includes a cylinder internal pressure sensor, a torque sensor, and an engine control device. The cylinder internal pressure sensor detects a cylinder internal pressure. The torque sensor detects an engine load. The engine control device receives a detection result of the cylinder internal pressure sensor and a detection result of the torque sensor. If the load detected by the torque sensor is zero (no load) and the cylinder internal pressure obtained from the detection result of the cylinder internal pressure sensor is greater than or equal to a threshold, the engine control device determines that an abnormality occurs in detection by the torque sensor.Type: GrantFiled: October 21, 2021Date of Patent: March 7, 2023Assignee: Yanmar Power Technology Co., Inc.Inventors: Masayoshi Doui, Taishi Murakami
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Publication number: 20230033387Abstract: An engine including an exhaust bypass valve and an intake bypass valve. The exhaust bypass valve is disposed in an exhaust bypass channel connecting an outlet of an exhaust manifold and an exhaust outlet of a turbocharger to each other. The intake bypass valve is disposed in an intake bypass channel connecting an inlet of an intake manifold and an inlet of the turbocharger. An intake pressure sensor detects a pressure of the intake manifold. If an instruction value indicating an upper limit or a lower limit of the valve opening degree of the intake bypass valve is continuously output for a predetermined time or more, an engine control device determines that an abnormality occurs in at least one of the exhaust bypass valve and the intake bypass valve.Type: ApplicationFiled: October 6, 2022Publication date: February 2, 2023Applicant: Yanmar Power Technology Co., Ltd.Inventors: Taishi Murakami, Masayoshi Doui
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Patent number: 11492960Abstract: An engine including an exhaust bypass valve and an intake bypass valve. The exhaust bypass valve is disposed in an exhaust bypass channel connecting an outlet of an exhaust manifold and an exhaust outlet of a turbocharger to each other. The intake bypass valve is disposed in an intake bypass channel connecting an inlet of an intake manifold and an inlet of the turbocharger. An intake pressure sensor detects a pressure of the intake manifold. If an instruction value indicating an upper limit or a lower limit of the valve opening degree of the intake bypass valve is continuously output for a predetermined time or more, an engine control device determines that an abnormality occurs in at least one of the exhaust bypass valve and the intake bypass valve.Type: GrantFiled: June 30, 2021Date of Patent: November 8, 2022Assignee: Yanmar Power Technology Co., Ltd.Inventors: Taishi Murakami, Masayoshi Doui
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Publication number: 20220178316Abstract: An engine includes a cylinder internal pressure sensor, a torque sensor, and an engine control device. The cylinder internal pressure sensor detects a cylinder internal pressure. The torque sensor detects an engine load. The engine control device receives a detection result of the cylinder internal pressure sensor and a detection result of the torque sensor. If the load detected by the torque sensor is zero (no load) and the cylinder internal pressure obtained from the detection result of the cylinder internal pressure sensor is greater than or equal to a threshold, the engine control device determines that an abnormality occurs in detection by the torque sensor.Type: ApplicationFiled: October 21, 2021Publication date: June 9, 2022Applicant: Yanmar Power Technology Co., Ltd.Inventors: Masayoshi Doui, Taishi Murakami
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Patent number: 11187163Abstract: An engine including a cylinder internal pressure sensor, a torque sensor, and an engine control device. The cylinder internal pressure sensor detects a cylinder internal pressure. The torque sensor detects an engine load. The engine control device receives a detection result of the cylinder internal pressure sensor and a detection result of the torque sensor. If the load detected by the torque sensor is zero (no load) and the cylinder internal pressure obtained from the detection result of the cylinder internal pressure sensor is greater than or equal to a threshold, the engine control device determines that an abnormality occurs in detection by the torque sensor.Type: GrantFiled: July 11, 2017Date of Patent: November 30, 2021Assignee: YANMAR POWER TECHNOLOGY CO., LTD.Inventors: Masayoshi Doui, Taishi Murakami
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Publication number: 20210324789Abstract: An engine including an exhaust bypass valve and an intake bypass valve. The exhaust bypass valve is disposed in an exhaust bypass channel connecting an outlet of an exhaust manifold and an exhaust outlet of a turbocharger to each other. The intake bypass valve is disposed in an intake bypass channel connecting an inlet of an intake manifold and an inlet of the turbocharger. An intake pressure sensor detects a pressure of the intake manifold. If an instruction value indicating an upper limit or a lower limit of the valve opening degree of the intake bypass valve is continuously output for a predetermined time or more, an engine control device determines that an abnormality occurs in at least one of the exhaust bypass valve and the intake bypass valve.Type: ApplicationFiled: June 30, 2021Publication date: October 21, 2021Applicant: Yanmar Power Technology Co., Ltd.Inventors: Taishi Murakami, Masayoshi Doui
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Publication number: 20210293187Abstract: An engine (21) including a cylinder internal pressure sensor (63), a torque sensor (64), and an engine control device (73). The cylinder internal pressure sensor (63) detects a cylinder internal pressure. The torque sensor (64) detects an engine load. The engine control device (73) receives a detection result of the cylinder internal pressure sensor (63) and a detection result of the torque sensor (64). If the load detected by the torque sensor (64) is zero (no load) and the cylinder internal pressure obtained from the detection result of the cylinder internal pressure sensor (63) is greater than or equal to a threshold, the engine control device (73) determines that an abnormality occurs in detection by the torque sensor (64).Type: ApplicationFiled: July 11, 2017Publication date: September 23, 2021Applicant: Yanmar Co., Ltd.Inventors: Masayoshi DOUI, Taishi MURAKAMI
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Patent number: 10760505Abstract: An engine device including an engine capable of coping with both a premix combustion mode in which premixed fuel obtained by mixing fuel with air in advance is supplied into a cylinder and combusted and a diffusion combustion mode in which liquid fuel is injected into the cylinder and combusted. The engine device further includes a gas supply device configured to supply the gaseous fuel into the cylinder in the premix combustion mode; a pilot injection device configured to inject the liquid fuel into the cylinder in the premix combustion mode; and a main injection device configured to inject the liquid fuel into the cylinder in the diffusion combustion mode. The liquid fuel is injected from the main injection device and the liquid fuel is injected from the pilot injection device during the diffusion combustion mode, thus diagnosing failure in the pilot injection device.Type: GrantFiled: June 16, 2017Date of Patent: September 1, 2020Assignee: YANMAR CO., LTD.Inventor: Masayoshi Doui
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Patent number: 10738687Abstract: An engine including an exhaust bypass valve and an intake bypass valve. The exhaust bypass valve is disposed in an exhaust bypass channel connecting an outlet of an exhaust manifold and an exhaust outlet of a turbocharger to each other. The intake bypass valve is disposed in an intake bypass channel connecting an inlet of an intake manifold and an inlet of the turbocharger. An intake pressure sensor detects a pressure of the intake manifold. If an instruction value indicating an upper limit or a lower limit of the valve opening degree of the intake bypass valve is continuously output for a predetermined time or more, an engine control device determines that an abnormality occurs in at least one of the exhaust bypass valve and the intake bypass valve.Type: GrantFiled: June 23, 2017Date of Patent: August 11, 2020Assignee: YANMAR CO., LTD.Inventors: Taishi Murakami, Masayoshi Doui
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Publication number: 20190211755Abstract: An engine device including an engine capable of coping with both a premix combustion mode in which premixed fuel obtained by mixing fuel with air in advance is supplied into a cylinder and combusted and a diffusion combustion mode in which liquid fuel is injected into the cylinder and combusted. The engine device further includes a gas supply device configured to supply the gaseous fuel into the cylinder in the premix combustion mode; a pilot injection device configured to inject the liquid fuel into the cylinder in the premix combustion mode; and a main injection device configured to inject the liquid fuel into the cylinder in the diffusion combustion mode. The liquid fuel is injected from the main injection device and the liquid fuel is injected from the pilot injection device during the diffusion combustion mode, thus diagnosing failure in the pilot injection device.Type: ApplicationFiled: June 16, 2017Publication date: July 11, 2019Applicant: Yanmar Co., Ltd.Inventor: Masayoshi DOUI