Patents by Inventor Keiji Yoeda
Keiji Yoeda 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: 11913517Abstract: A vibration damper that damp vibrations transmitted between a drive unit and a support body. The vibration damper comprises: an elastic member interposed between the drive unit and the support body; a rotor supported by the drive unit or the support body; and a vibration translating mechanism that rotates the rotor and reciprocates the rotor between the drive unit and the support body, in response to the vibrations acting in a vibrating direction to isolate the drive unit and the support body away from each other and bring the drive unit and the support body closer together.Type: GrantFiled: September 9, 2022Date of Patent: February 27, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keiji Yoeda, Hiroyuki Amano, Shingo Okaya
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Publication number: 20230304562Abstract: A vibration damper that effectively damps vibrations moving a drive unit and a support body closer to and away from each other by a rolling mass. The vibration damper comprises: an elastic member interposed between the drive unit and the support body; an arm extending from the drive unit toward the support body; a rolling mass rolled on the arm by a reciprocation of the arm; a support member fixed to the support body while rotatably supporting the rolling mass; and a position changer that changes a contact point between the rolling mass and the arm by reciprocating the arm.Type: ApplicationFiled: March 7, 2023Publication date: September 28, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keiji YOEDA, Hiroyuki AMANO, Shingo OKAYA
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Publication number: 20230087669Abstract: A vibration damper that damp vibrations transmitted between a drive unit and a support body. The vibration damper comprises: an elastic member interposed between the drive unit and the support body; a rotor supported by the drive unit or the support body; and a vibration translating mechanism that rotates the rotor and reciprocates the rotor between the drive unit and the support body, in response to the vibrations acting in a vibrating direction to isolate the drive unit and the support body away from each other and bring the drive unit and the support body closer together.Type: ApplicationFiled: September 9, 2022Publication date: March 23, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keiji YOEDA, Hiroyuki AMANO, Shingo OKAYA
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Patent number: 11008919Abstract: An internal combustion engine with a turbocharger includes a catalyst, downstream of a turbine, in an exhaust passage. The internal combustion engine includes a waste gate, and a waste gate valve. The internal combustion engine further includes a flow-adjusting member or a flow-adjusting mechanism. The flow-adjusting member disperses a flow of exhaust gas from the waste gate when the opening degree of the waste gate valve is small and concentrates the flow when the opening degree of the waste gate valve is large. The flow-adjusting mechanism switches between a dispersed state in which the flow is dispersed and a concentrate state in which the flow is concentrated.Type: GrantFiled: March 6, 2018Date of Patent: May 18, 2021Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, SOKEN, INC.Inventors: Hideaki Kosuge, Tadayoshi Nakase, Mitsunobu Uchida, Masaaki Kono, Keiji Yoeda
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Patent number: 10731548Abstract: A mechanical supercharging system includes a stepped transmission that connects a crankshaft of an internal combustion engine with driving wheels, a centrifugal supercharger including a rotary drive shaft connected to the crankshaft, a variable speed ratio device that changes a speed ratio of the rotary drive shaft to the crankshaft, the variable speed ratio device being provided between the crankshaft and the rotary drive shaft; and a control device configured to control the speed ratio. The control device increases the speed ratio during the upshift operation more than the speed ratio before start of the upshift operation.Type: GrantFiled: April 4, 2018Date of Patent: August 4, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Keiji Yoeda
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Patent number: 10280936Abstract: In a compressor for a supercharger of an internal combustion engine comprising a shroud, an impeller, a vaneless diffuser, and a scroll, a hub-side wall of the vaneless diffuser is formed to be inclined to the opposite side to a shroud-side wall with respect to a direction perpendicular to a rotational axis of the impeller in the longitudinal cross section including the rotational axis of the impeller. With such a configuration, the amount of deposit formed on the hub-side wall of the vaneless diffuser is reduced.Type: GrantFiled: July 6, 2012Date of Patent: May 7, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Keiji Yoeda
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Patent number: 10280853Abstract: A supercharged internal combustion engine is provided that is capable of introducing EGR gas into an intake passage on an upstream side relative to a compressor. When a required WGV opening degree is less than a lower limit value WGVmin in a case in which introduction of EGR gas is started under a situation in which the temperature of an EGR valve is less than or equal to a predetermined value X1, the WGV opening degree is controlled during a protection time period T3 after introduction of EGR gas starts by using the lower limit value WGVmin as the required WGV opening degree.Type: GrantFiled: June 1, 2015Date of Patent: May 7, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Keiji Yoeda
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Publication number: 20180313259Abstract: A mechanical supercharging system includes a stepped transmission that connects a crankshaft of an internal combustion engine with driving wheels, a centrifugal supercharger including a rotary drive shaft connected to the crankshaft, a variable speed ratio device that changes a speed ratio of the rotary drive shaft to the crankshaft, the variable speed ratio device being provided between the crankshaft and the rotary drive shaft; and a control device configured to control the speed ratio. The control device increases the speed ratio during the upshift operation more than the speed ratio before start of the upshift operation.Type: ApplicationFiled: April 4, 2018Publication date: November 1, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Keiji YOEDA
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Publication number: 20180258840Abstract: An exhaust turbine power generating system includes an internal combustion engine, an exhaust turbine power generator, and an electronic control unit configured to individually control a first electric power generation load of the exhaust turbine power generator in a first period and a second electric power generation load of the exhaust turbine power generator in a second period and to perform control such that the second electric power generation load of the exhaust turbine power generator becomes equal to or smaller than the first electric power generation load. The first period is a period that starts at an exhaust start timing in an exhaust cycle and the second period is a period after the first period in the exhaust cycle. The exhaust start timing is a timing at which the exhaust gas starts to be discharged toward the turbine from an arbitrary cylinder in the internal combustion engine.Type: ApplicationFiled: March 6, 2018Publication date: September 13, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Keiji YOEDA
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Publication number: 20180258817Abstract: An internal combustion engine with a turbocharger includes a catalyst, downstream of a turbine, in an exhaust passage. The internal combustion engine includes a waste gate, and a waste gate valve. The internal combustion engine further includes a flow-adjusting member or a flow-adjusting mechanism. The flow-adjusting member disperses a flow of exhaust gas from the waste gate when the opening degree of the waste gate valve is small and concentrates the flow when the opening degree of the waste gate valve is large. The flow-adjusting mechanism switches between a dispersed state in which the flow is dispersed and a concentrate state in which the flow is concentrated.Type: ApplicationFiled: March 6, 2018Publication date: September 13, 2018Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SOKEN, INC.Inventors: Hideaki KOSUGE, Tadayoshi NAKASE, Mitsunobu UCHIDA, Masaaki KONO, Keiji YOEDA
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Publication number: 20170314493Abstract: An internal combustion engine includes a twin entry type turbocharger with which a first exhaust passage and a second exhaust passage respectively communicate individually, a communication path that causes the first exhaust passage and the second exhaust passage to communicate with each other, a communication valve that opens and closes the communication path, an abnormality diagnosis device that diagnoses presence or absence of abnormality of the communication valve, a variable valve timing mechanism capable of changing a period of valve overlap of the engine, and a control device. When it is determined that abnormality of a valve closure failure of the communication valve is present, the control device operates the mechanism to reduce the valve overlap in an operating state in which the communication valve is closed, more than in a case where it is determined that abnormality of a valve closure failure of the communication valve is absent.Type: ApplicationFiled: April 27, 2017Publication date: November 2, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keiji YOEDA, lsao MATSUMOTO
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Publication number: 20170089279Abstract: A supercharged internal combustion engine is provided that is capable of introducing EGR gas into an intake passage on an upstream side relative to a compressor. When a required WGV opening degree is less than a lower limit value WGVmin in a case in which introduction of EGR gas is started under a situation in which the temperature of an EGR valve is less than or equal to a predetermined value X1, the WGV opening degree is controlled during a protection time period T3 after introduction of EGR gas starts by using the lower limit value WGVmin as the required WGV opening degree.Type: ApplicationFiled: June 1, 2015Publication date: March 30, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Keiji YOEDA
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Publication number: 20160025048Abstract: The object of the invention is to provide a cooling device for accomplishing both of required engine and compressor cooling degrees. The invention relates to a cooling device for an engine provided with a blowby gas recirculation device (50) and a turbocharger (60), the blowby gas recirculation device recirculating a blowby gas to an intake passage upstream of a compressor of the turbocharger. The cooling device comprises a first cooling device (70) for cooling a body (20) of the engine and a second cooling device (80) for cooling an intake air, separately. The second cooling device cools the compressor (61).Type: ApplicationFiled: April 12, 2013Publication date: January 28, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Jumpei SHIOTA, Matsuyoshi SUGIYAMA, Keiji YOEDA, Naruto YAMANE, Satoshi SUGIYAMA, Isao MATSUMOTO, Masakazu TABATA
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Publication number: 20150377118Abstract: The object of the invention is to suppress the generation or accumulation of deposits in a compressor of a turbocharger of an engine provided with a blowby gas recirculation device. The invention relates to a cooling device for the turbocharger (60) of the engine (10) provided with the blowby gas recirculation device (50). The cooling device has a cooled air introduction passage (70). The blowby gas recirculation device introduces a blowby gas to an area upstream of the compressor. The cooled air introduction passage introduces a cooled air to a diffuser passage (64) of the compressor. The cooled air introduction passage introduces the cooled air to the diffuser passage in a direction having an acute angle with respect to a flow direction (IA) of the intake air flowing through the diffuser passage.Type: ApplicationFiled: February 21, 2013Publication date: December 31, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Satoshi SUGIYAMA, Kichiro KATO, Keiji YOEDA, Matsuyoshi SUGIYAMA, Isao MATSUMOTO, Naruto YAMANE
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Publication number: 20150132120Abstract: In a compressor for a supercharger of an internal combustion engine comprising a shroud, an impeller, a vaneless diffuser, and a scroll, a hub-side wall of the vaneless diffuser is formed to be inclined to the opposite side to a shroud-side wall with respect to a direction perpendicular to a rotational axis of the impeller in the longitudinal cross section including the rotational axis of the impeller. With such a configuration, the amount of deposit formed on the hub-side wall of the vaneless diffuser is reduced.Type: ApplicationFiled: July 6, 2012Publication date: May 14, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Keiji Yoeda
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Patent number: 9002619Abstract: It is possible to suppress fluctuations of an air intake amount when the open degree of an air intake control valve is unknown. An engine includes an impulse valve common to all the cylinders arranged in the engine. The impulse valve is arranged in a communicating tube provided at the downstream side of a serge tank. An ECU executes impulse valve drive control. In the control, the ECU judges whether a rotation angle sensor which detects the open degree of the impulse valve has failed. If it is judged that the rotation angle sensor has failed, the ECU controls a drive motor and a drive circuit for driving a valve body so that a valve body of the impulse valve rotates inside the communicating tube. Here, the rotor of the drive motor which defines the rotation speed of the valve body has an rpm which is set in accordance with the mechanical rpm NE of the engine.Type: GrantFiled: November 28, 2008Date of Patent: April 7, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yasushi Ito, Shouji Katsumata, Keiji Yoeda, Hideyuki Nishida, Shiro Tanno
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Patent number: 8652007Abstract: A pressure accumulation system for an internal combustion engine can prevent exhaust pressure from excessively increasing when pressurized gas is contained in a pressure accumulation container. A pressure accumulation system is applied for an internal combustion engine provided with an exhaust shut-off valve mounted in an exhaust path. The pressure accumulation system has a pressure accumulation tank into which gas can be introduced from that portion of an exhaust path. The pressure accumulation system also has a sensor for detecting the exhaust pressure, and an EGR valve is controlled based on the detection value from the exhaust gas sensor such that the pressure in that portion of the exhaust path which is on the upstream of the exhaust shut-off valve is limited below a predetermined exhaust gas upper limit value (Pmax) when gas is contained in the pressure accumulation tank.Type: GrantFiled: December 11, 2008Date of Patent: February 18, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kichiro Kato, Keiji Yoeda
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Patent number: 8266947Abstract: A cetane number estimating device (1) comprises cylinders which are provided to an internal combustion engine where a part of the exhaust gas can be fed back from the exhaust system to the intake system, injection device (30) for injecting fuel into the cylinders, measuring device (40) for measuring the ignition timings in the cylinders, and estimating device (20) for estimating the cetane number of the fuel according to the measured ignition timing as well as any one of a first correlation between the ignition timing corresponding to the stage at which when one cylinder is in the intake stroke, another cylinder in the exhaust stroke exhausts non-burned gas and the cetane number and a second correlation between the ignition timing corresponding to the stage at which when one cylinder is in the intake stroke, another cylinder exhausts burned gas and the cetane number.Type: GrantFiled: May 28, 2008Date of Patent: September 18, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventor: Keiji Yoeda
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Publication number: 20120204559Abstract: A supercharging system comprising a pressure wave supercharger which supercharges an internal combustion engine by increasing a pressure of gas in a cell using a pressure wave of exhaust gas and discharging from an intake gas outlet port to an intake gas passage the gas pressurized further comprises a first motor which rotates a rotor, and a valve plate and a second motor capable of changing a position of the intake gas outlet port with respect to an exhaust gas inlet port. The motors are controlled so as to change a rotation number of the rotor and the position of the intake gas outlet port with respect to the exhaust gas inlet port based on a quantity of flow of exhaust gas to be recirculated to the intake gas passage.Type: ApplicationFiled: October 30, 2009Publication date: August 16, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keiji Yoeda, Kichiro Kato, Fumio Takamiya, Satoshi Sugiyama, Naruto Yamane, Hiroyuki Suganuma
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Publication number: 20120192558Abstract: A supercharging system for an internal combustion engine comprising a turbocharger including a compressor and a turbine, and a pressure wave supercharger performing supercharging of the internal combustion engine by increasing a pressure of gas led into each of cells from an intake gas inlet port using a pressure wave of exhaust gas led into the cell from an exhaust gas inlet port and discharging from an intake gas outlet port to an intake passage the gas pressurized, wherein a case of the pressure wave supercharger is connected to the intake passage upstream of the compressor via the intake gas inlet port, and is connected to the intake passage downstream of the compressor via the intake gas outlet port, and is connected to an exhaust passage downstream of the turbine via the exhaust gas inlet port and an exhaust gas outlet port.Type: ApplicationFiled: October 6, 2009Publication date: August 2, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Fumio Takamiya, Keiji Yoeda, Kichiro Kato, Naruto Yamane, Satoshi Sugiyama, Hiroyuki Suganuma