Patents by Inventor Naoto Hisaminato
Naoto Hisaminato 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: 11199124Abstract: A cooling apparatus for an internal combustion engine includes a pump, a radiator, a flow rate adjustment valve, a bypass passage, and a controller. The flow rate adjustment valve includes a valve member that rotates to change an open degree of the flow rate adjustment valve and a valve member biasing component that biases the valve member in a valve-closing direction in which the open degree decreases. The valve member rotates in a valve-opening direction in which the open degree increases when a pressure difference increases between positions upstream and downstream of the valve member in a flow direction of coolant in the circulation circuit and rotate in the valve-closing direction when the pressure difference decreases. The controller increases the pump discharge amount as a target radiator flow rate that is a target of an amount of coolant passing through the radiator increases.Type: GrantFiled: October 22, 2019Date of Patent: December 14, 2021Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHAInventors: Noboru Takagi, Hirokazu Kato, Rihito Kaneko, Naoto Hisaminato, Hirokazu Ando, Masaaki Yamaguchi, Hirotaka Watanabe, Masahiro Yoshida, Koji Nunami, Naoto Yumisashi, Masafumi Yoshida, Takahiko Aoyagi
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Patent number: 11143327Abstract: A cooling apparatus includes a circulation circuit, a pump, a flow rate adjustment valve, and a controller. The flow rate adjustment valve includes a valve member that rotates to change an open degree of the flow rate adjustment valve and a stopper that moves between a restriction position and a retraction position. The controller is configured to execute, when maintaining the open degree of the flow rate adjustment, a preparatory process of moving the stopper to the restriction position after arranging the stopper at the retraction position and arranging the valve member further in the valve-closing direction than the stopper through control of the pump discharge amount.Type: GrantFiled: October 22, 2019Date of Patent: October 12, 2021Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHAInventors: Noboru Takagi, Hirokazu Kato, Rihito Kaneko, Naoto Hisaminato, Hirokazu Ando, Masaaki Yamaguchi, Hirotaka Watanabe, Takahiko Aoyagi, Masahiro Yoshida, Koji Nunami, Naoto Yumisashi, Masafumi Yoshida
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Patent number: 11111876Abstract: A cylinder head includes an exhaust port through which exhaust gas discharged out of a combustion chamber of an internal combustion engine passes. The cylinder head includes a first fin and a second fin projecting from an inner wall of the exhaust port and extending in a flow direction of the exhaust gas. The cylinder head includes a first projection projecting from the inner wall of the exhaust port and extending in a direction intersecting the first fin. The cylinder head also includes a second projection projecting from the inner wall of the exhaust port and extending in a direction intersecting the second fin.Type: GrantFiled: April 1, 2020Date of Patent: September 7, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masahiko Asano, Noboru Takagi, Naoto Hisaminato, Minoru Okimura, Shinya Wakabayashi
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Patent number: 10961898Abstract: A cooling device includes an inner passage, an outer passage, an engine-driven pump, an electromagnetic control valve, and a driving circuit that regulates current flowing through the electromagnetic control valve by activating and deactivating a switching element. A cooling controller for the cooling device includes a processing circuit configured to execute an operation process for operating, when the engine-driven pump is driven, the switching element by setting a duty cycle of an activation time to a switching cycle, which is a reciprocal of a switching frequency of the switching element, to be a larger value when a temperature of the internal combustion engine is low than when the temperature is high and a cycle varying process for setting a longer switching cycle when the temperature of the internal combustion engine is less than a preset temperature than when the temperature is greater than or equal to the preset temperature.Type: GrantFiled: June 12, 2019Date of Patent: March 30, 2021Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHAInventors: Rihito Kaneko, Noboru Takagi, Naoto Hisaminato, Mitsuru Yamaguchi, Hirokazu Ando, Masaaki Yamaguchi, Takahiko Aoyagi, Hirotaka Watanabe
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Patent number: 10927747Abstract: A cooling system of an internal combustion engine includes an adjustment valve configured to adjust a flow rate of a cooling liquid discharged from a water jacket. A controller for the cooling system includes circuitry configured to execute flow-restriction control that controls the adjustment valve to restrict discharge of the cooling liquid from the water jacket, thereby increasing temperature of an engine body. The circuitry is configured to execute the flow-restriction control so that temperature of the cooling liquid in the water jacket at which the flow-restriction control is terminated is lower when an ambient pressure is low than when the ambient pressure is high.Type: GrantFiled: June 6, 2018Date of Patent: February 23, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Rihito Kaneko, Noboru Takagi, Naoto Hisaminato, Mitsuru Yamaguchi, Hirokazu Andoh, Masaaki Yamaguchi, Yoshihiro Furuya
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Publication number: 20200325846Abstract: A cylinder head includes an exhaust port through which exhaust gas discharged out of a combustion chamber of an internal combustion engine passes. The cylinder head includes a first fin and a second fin projecting from an inner wall of the exhaust port and extending in a flow direction of the exhaust gas. The cylinder head includes a first projection projecting from the inner wall of the exhaust port and extending in a direction intersecting the first fin. The cylinder head also includes a second projection projecting from the inner wall of the exhaust port and extending in a direction intersecting the second fin.Type: ApplicationFiled: April 1, 2020Publication date: October 15, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masahiko ASANO, Noboru TAKAGI, Naoto HISAMINATO, Minoru OKIMURA, Shinya WAKABAYASHI
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Publication number: 20200157999Abstract: A cooling apparatus for an internal combustion engine includes a pump, a radiator, a flow rate adjustment valve, a bypass passage, and a controller. The flow rate adjustment valve includes a valve member that rotates to change an open degree of the flow rate adjustment valve and a valve member biasing component that biases the valve member in a valve-closing direction in which the open degree decreases. The valve member rotates in a valve-opening direction in which the open degree increases when a pressure difference increases between positions upstream and downstream of the valve member in a flow direction of coolant in the circulation circuit and rotate in the valve-closing direction when the pressure difference decreases. The controller increases the pump discharge amount as a target radiator flow rate that is a target of an amount of coolant passing through the radiator increases.Type: ApplicationFiled: October 22, 2019Publication date: May 21, 2020Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHAInventors: Noboru TAKAGI, Hirokazu KATO, Rihito KANEKO, Naoto HISAMINATO, Hirokazu ANDO, Masaaki YAMAGUCHI, Hirotaka WATANABE, Masahiro YOSHIDA, Koji NUNAMI, Naoto YUMISASHI, Masafumi YOSHIDA, Takahiko AOYAGI
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Publication number: 20200158254Abstract: A cooling apparatus includes a circulation circuit, a pump, a flow rate adjustment valve, and a controller. The flow rate adjustment valve includes a valve member that rotates to change an open degree of the flow rate adjustment valve and a stopper that moves between a restriction position and a retraction position. The controller is configured to execute, when maintaining the open degree of the flow rate adjustment, a preparatory process of moving the stopper to the restriction position after arranging the stopper at the retraction position and arranging the valve member further in the valve-closing direction than the stopper through control of the pump discharge amount.Type: ApplicationFiled: October 22, 2019Publication date: May 21, 2020Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHAInventors: Noboru TAKAGI, Hirokazu KATO, Rihito KANEKO, Naoto HISAMINATO, Hirokazu ANDO, Masaaki YAMAGUCHI, Hirotaka WATANABE, Takahiko AOYAGI, Masahiro YOSHIDA, Koji NUNAMI, Naoto YUMISASHI, Masafumi YOSHIDA
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Patent number: 10598077Abstract: An ECU includes a motor control unit that controls energization to a motor, and a fixation determination unit that makes a determination on fixation of a valve body. The motor drives the valve body housed in a housing of a control valve. When the fixation determination unit has determined that the valve body is fixed, the motor control unit performs fixation-time control that energizes the motor so as to drive the valve body.Type: GrantFiled: September 5, 2017Date of Patent: March 24, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Rihito Kaneko, Noboru Takagi, Isao Takagi, Naoto Hisaminato, Mitsuru Yamaguchi, Hirokazu Ando, Hidetoshi Onoda, Hiroshi Akeyama
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Publication number: 20190383202Abstract: A cooling device includes an inner passage, an outer passage, an engine-driven pump, an electromagnetic control valve, and a driving circuit that regulates current flowing through the electromagnetic control valve by activating and deactivating a switching element. A cooling controller for the cooling device includes a processing circuit configured to execute an operation process for operating, when the engine-driven pump is driven, the switching element by setting a duty cycle of an activation time to a switching cycle, which is a reciprocal of a switching frequency of the switching element, to be a larger value when a temperature of the internal combustion engine is low than when the temperature is high and a cycle varying process for setting a longer switching cycle when the temperature of the internal combustion engine is less than a preset temperature than when the temperature is greater than or equal to the preset temperature.Type: ApplicationFiled: June 12, 2019Publication date: December 19, 2019Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHAInventors: Rihito KANEKO, Noboru TAKAGI, Naoto HISAMINATO, Mitsuru YAMAGUCHI, Hirokazu ANDO, Masaaki YAMAGUCHI, Takahiko AOYAGI, Hirotaka WATANABE
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Patent number: 10508588Abstract: A cooling device includes: an air blast passage; a heater core that is disposed in the air blast passage; an air blast volume adjusting member that is opened and closed to adjust an air blast volume which flows in the heater core; a flow rate adjuster that adjusts a flow rate of the coolant which is introduced into the heater core; and a controller. The controller sets the flow rate of the coolant which is adjusted by the flow rate adjuster to be less than a lower limit value of an adjustable range of the flow rate of the coolant which is adjusted by the flow rate adjuster in a vehicle compartment air-conditioning state in which the air blast volume adjusting member allows an air blast to flow to the heater core when the air blast volume adjusting member fully closes the heater core side of the air blast passage.Type: GrantFiled: April 24, 2018Date of Patent: December 17, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Rihito Kaneko, Noboru Takagi, Naoto Hisaminato, Mitsuru Yamaguchi, Hirokazu Andoh, Masaaki Yamaguchi, Yoshihiro Furuya
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Patent number: 10253678Abstract: An engine cooling apparatus includes a mechanical water pump having a suction hole and N discharge holes (N is an integer not less than two), N water jackets that are arranged in an engine and correspond to the N discharge holes, N joint passages, each of which joins one of the N discharge holes to the associated water jacket, a return passage that returns coolant to the suction hole after the coolant has passed through the N water jackets and has merged in a merging portion, a coolant stopping mechanism that blocks return flow of coolant through the return passage, and N communication passages each of which allows the corresponding one of the N joint passages to communicate with the suction hole while bypassing the N water jackets and the coolant stopping mechanism.Type: GrantFiled: January 18, 2017Date of Patent: April 9, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Rihito Kaneko, Noboru Takagi, Isao Takagi, Takashi Matsutani, Naoto Hisaminato, Mitsuru Yamaguchi, Hirokazu Ando
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Publication number: 20190010857Abstract: A cooling system of an internal combustion engine includes an adjustment valve configured to adjust a flow rate of a cooling liquid discharged from a water jacket. A controller for the cooling system includes circuitry configured to execute flow-restriction control that controls the adjustment valve to restrict discharge of the cooling liquid from the water jacket, thereby increasing temperature of an engine body. The circuitry is configured to execute the flow-restriction control so that temperature of the cooling liquid in the water jacket at which the flow-restriction control is terminated is lower when an ambient pressure is low than when the ambient pressure is high.Type: ApplicationFiled: June 6, 2018Publication date: January 10, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Rihito KANEKO, Noboru TAKAGI, Naoto HISAMINATO, Mitsuru YAMAGUCHI, Hirokazu ANDOH, Masaaki YAMAGUCHI, Yoshihiro FURUYA
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Publication number: 20180347445Abstract: A cooling device includes: an air blast passage; a heater core that is disposed in the air blast passage; an air blast volume adjusting member that is opened and closed to adjust an air blast volume which flows in the heater core; a flow rate adjuster that adjusts a flow rate of the coolant which is introduced into the heater core; and a controller. The controller sets the flow rate of the coolant which is adjusted by the flow rate adjuster to be less than a lower limit value of an adjustable range of the flow rate of the coolant which is adjusted by the flow rate adjuster in a vehicle compartment air-conditioning state in which the air blast volume adjusting member allows an air blast to flow to the heater core when the air blast volume adjusting member fully closes the heater core side of the air blast passage.Type: ApplicationFiled: April 24, 2018Publication date: December 6, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Rihito Kaneko, Noboru Takagi, Naoto Hisaminato, Mitsuru Yamaguchi, Hirokazu Andoh, Masaaki Yamaguchi, Yoshihiro Furuya
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Publication number: 20180066567Abstract: An ECU includes a motor control unit that controls energization to a motor, and a fixation determination unit that makes a determination on fixation of a valve body. The motor drives the valve body housed in a housing of a control valve. When the fixation determination unit has determined that the valve body is fixed, the motor control unit performs fixation-time control that energizes the motor so as to drive the valve body.Type: ApplicationFiled: September 5, 2017Publication date: March 8, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Rihito KANEKO, Noboru TAKAGI, Isao TAKAGI, Naoto HISAMINATO, Mitsuru YAMAGUCHI, Hirokazu ANDO, Hidetoshi ONODA, Hiroshi AKEYAMA
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Publication number: 20170218879Abstract: An engine cooling apparatus includes a mechanical water pump having a suction hole and N discharge holes (N is an integer not less than two), N water jackets that are arranged in an engine and correspond to the N discharge holes, N joint passages, each of which joins one of the N discharge holes to the associated water jacket, a return passage that returns coolant to the suction hole after the coolant has passed through the N water jackets and has merged in a merging portion, a coolant stopping mechanism that blocks return flow of coolant through the return passage, and N communication passages each of which allows the corresponding one of the N joint passages to communicate with the suction hole while bypassing the N water jackets and the coolant stopping mechanism.Type: ApplicationFiled: January 18, 2017Publication date: August 3, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Rihito KANEKO, Noboru TAKAGI, Isao TAKAGI, Takashi MATSUTANI, Naoto HISAMINATO, Mitsuru YAMAGUCHI, Hirokazu ANDO
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Patent number: 9309816Abstract: The present variable compression ratio V-type internal combustion engine is a variable compression ratio V-type internal combustion engine which joins cylinder blocks of two cylinder groups and makes the joined cylinder block move relatively to a crankcase, wherein at each relative movement position of the joined cylinder block, the intake valve closing timings of the cylinders are controlled so that the actual compression ratios of the two cylinder groups become equal and thus the temperature difference and pressure difference in the cylinders at top dead center between the two cylinder groups are reduced.Type: GrantFiled: December 16, 2009Date of Patent: April 12, 2016Assignee: Toyota Jidosha Kabushiki KaishaInventors: Eiichi Kamiyama, Manabu Tateno, Naoto Hisaminato
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Patent number: 9086021Abstract: An intake apparatus of an engine includes: a first intake passage supplying fresh air to a cylinder; a second intake passage arranged near the first intake passage, and supplying fresh air to the cylinder; a first intake valve opening and closing the first intake passage at an aperture of the first intake passage; a second intake valve opening and closing the second intake passage at an aperture of the second intake passage. An opening timing of the first intake valve of the intake apparatus advances relative to a top dead center, and a valve lift amount of the first intake valve differs from that of the second intake valve, and there is a period while the valve lift amount of the first intake valve is larger than that of the second intake valve, in an intake stroke.Type: GrantFiled: October 19, 2010Date of Patent: July 21, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi Okumura, Manabu Tateno, Naoto Hisaminato
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Patent number: 9032919Abstract: A spark ignition type internal combustion engine includes a plurality of cylinders and can stop combustion in part of these cylinders. Further, the spark ignition type internal combustion engine comprises a variable compression ratio mechanism (A) which can change an mechanical compression ratio, and a variable valve timing mechanism (B) which can control a closing timing of an intake valve. When idling part of the cylinders or increasing idled cylinders, the closing timing of an intake valve (7) moves in a direction which approaches an intake bottom dead center side, and the mechanical compression ratio of the operating cylinders falls. By idling part of the plurality of cylinders in this way, it is possible to realize a high heat efficiency even in a region where the engine load is low.Type: GrantFiled: December 4, 2009Date of Patent: May 19, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventors: Naoto Hisaminato, Eiichi Kamiyama, Manabu Tateno
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Patent number: 9027521Abstract: An intake apparatus of an engine includes: a first intake passage supplying fresh air to a cylinder; a second intake passage arranged near the first intake passage, and supplying fresh air to the cylinder; a first intake valve opening and closing the first intake passage at an aperture of the first intake passage; a second intake valve opening and closing the second intake passage at an aperture of the second intake passage. An opening timing of the first intake valve of the intake apparatus advances relative to a top dead center, and a valve lift amount of the first intake valve differs from that of the second intake valve, and there is a period while the valve lift amount of the first intake valve is larger than that of the second intake valve, in an intake stroke.Type: GrantFiled: October 19, 2010Date of Patent: May 12, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventors: Takeshi Okumura, Manabu Tateno, Naoto Hisaminato