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: 8985070Abstract: 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 the engine is provided with a first relative movement mechanism which is fastened to a first cylinder group side of the joined cylinder block through a plurality of supports and a second relative movement mechanism which is fastened to a second cylinder group side of the joined cylinder block through a plurality of supports. The number of the supports in each of the first relative movement mechanism and the second relative movement mechanism is made at least a number greater by exactly one than the number of cylinders of the first cylinder group and the second cylinder group, respectively.Type: GrantFiled: November 17, 2009Date of Patent: March 24, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventors: Manabu Tateno, Eiichi Kamiyama, Naoto Hisaminato
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Patent number: 8869772Abstract: An ECU 70A is associated with an engine 1 provided with a VVT 30 capable of independently setting a phase of an intake valve 2A and a phase of an intake valve 2B of two intake valves 2 mounted for a combustion chamber E. The ECU 70A includes a controller control the VVT 30 based on a magnitude of engine brake required to the engine 1 to vary a phase of at least one of the intake valves 2A and 2B.Type: GrantFiled: April 15, 2011Date of Patent: October 28, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Naoto Hisaminato, Manabu Tateno, Eiichi Kamiyama
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Patent number: 8695544Abstract: A high expansion ratio internal combustion engine includes: a variable compression ratio mechanism that varies a mechanical compression ratio of the internal combustion engine; and a variable valve train in which some valve(s) of a plurality of intake valves is phase-variable and the remaining valve(s) is phase-fixed, the variable valve train being configured such that a working angle of the phase-variable intake valve is larger than a working angle of the phase-fixed intake valve, wherein a valve-open timing of the phase-variable intake valve is retarded after a valve-open timing of the phase-fixed intake valve when the internal combustion engine is under low-load operating state.Type: GrantFiled: January 29, 2009Date of Patent: April 15, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Daisaku Sawada, Eiichi Kamiyama, Takashi Kawasaki, Yukihiro Nakasaka, Daisuke Akihisa, Naoto Hisaminato
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Patent number: 8671896Abstract: 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 10 move relatively to a crankcase along an arc-shaped path so as to move away from an engine crankshaft, wherein the arc-shaped path is set so that the mechanical compression ratio of one cylinder group and the mechanical compression ratio of the other cylinder group become equal when the cylinder block is at the lowest position closest to the engine crankshaft and when the cylinder block is at a specific position between the lowest position and a highest position which is furthest from the engine crankshaft.Type: GrantFiled: November 13, 2009Date of Patent: March 18, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Naoto Hisaminato, Manabu Tateno, Eiichi Kamiyama
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Publication number: 20130220272Abstract: An ECU 70A is associated with an engine 1 provided with a VVT 30 capable of independently setting a phase of an intake valve 2A and a phase of an intake valve 2B of two intake valves 2 mounted for a combustion chamber E. The ECU 70A includes a controller control the VVT 30 based on a magnitude of engine brake required to the engine 1 to vary a phase of at least one of the intake valves 2A and 2B.Type: ApplicationFiled: April 15, 2011Publication date: August 29, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoto Hisaminato, Manabu Tateno, Eiichi Kamiyama
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Publication number: 20120325167Abstract: A valve drive system of internal combustion engine which operates at a high compression ratio cycle, which is provided with an intake cam 52a and intake cam 52b for operating intake valves 7a, 7b and a variable valve timing device 70 which can offset the operating timings of the intake valves 7a, 7b by the intake cam 52a and the operating timings of the intake valves 7a, 7b by the intake cam 52b from each other. The intake cam 52a and intake cam 52b include circular parts and cam noses. At least one of the cam nose of the intake cam 52a and cam nose of the intake cam 52b has a concentric circular part which is formed in a circular shape concentric with the circular part.Type: ApplicationFiled: March 11, 2010Publication date: December 27, 2012Inventors: Eiichi Kamiyama, Manabu Tateno, Naoto Hisaminato
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Publication number: 20120316759Abstract: 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: ApplicationFiled: December 16, 2009Publication date: December 13, 2012Inventors: Eiichi Kamiyama, Manabu Tateno, Naoto Hisaminato
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Publication number: 20120260890Abstract: 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 the engine is provided with a first relative movement mechanism which is fastened to a first cylinder group side of the joined cylinder block through a plurality of supports and a second relative movement mechanism which is fastened to a second cylinder group side of the joined cylinder block through a plurality of supports. The number of the supports in each of the first relative movement mechanism and the second relative movement mechanism is made at least a number greater by exactly one than the number of cylinders of the first cylinder group and the second cylinder group, respectively.Type: ApplicationFiled: November 17, 2009Publication date: October 18, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Manabu Tateno, Eiichi Kamiyama, Naoto Hisaminato
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Publication number: 20120234274Abstract: 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: ApplicationFiled: December 4, 2009Publication date: September 20, 2012Inventors: Naoto Hisaminato, Eiichi Kamiyama, Manabu Tateno
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Publication number: 20120210957Abstract: 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 10 move relatively to a crankcase along an arc-shaped path so as to move away from an engine crankshaft, wherein the arc-shaped path is set so that the mechanical compression ratio of one cylinder group and the mechanical compression ratio of the other cylinder group become equal when the cylinder block is at the lowest position closest to the engine crankshaft and when the cylinder block is at a specific position between the lowest position and a highest position which is furthest from the engine crankshaft.Type: ApplicationFiled: November 13, 2009Publication date: August 23, 2012Inventors: Naoto Hisaminato, Manabu Tateno, Eiichi Kamiyama
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Publication number: 20120210979Abstract: 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: ApplicationFiled: October 19, 2010Publication date: August 23, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi Okumura, Manabu Tateno, Naoto Hisaminato
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Patent number: 8161940Abstract: Provided is a spark ignition type internal combustion engine comprising a variable compression ratio mechanism (A) capable of changing a mechanical compression ratio, and a variable valve timing mechanism (B) capable of controlling the closing timing of an intake valve. At an engine low-load running time, the mechanical compression ratio is made so higher than that at an engine high-load running time that the expansion ratio may be 20 or higher. In case the vacuum in an engine intake passage is lower than the required vacuum, the opening of a throttle valve (17) is reduced, and the valve closing timing of the intake valve is controlled so that the intake air in a quantity according to the engine load may be fed to the inside of a combustion chamber in accordance with the opening of the throttle valve. As a result, a brake booster or the like can be properly activated in the internal combustion engine having its mechanical compression ratio enlarged at the engine low-load running time.Type: GrantFiled: November 6, 2008Date of Patent: April 24, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Naoto Hisaminato, Daisuke Akihisa, Eiichi Kamiyama, Yukihiro Nakasaka
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Publication number: 20120017876Abstract: A high expansion ratio internal combustion engine includes: a variable compression ratio mechanism that varies a mechanical compression ratio of the internal combustion engine; and a variable valve train in which some valve(s) of a plurality of intake valves is phase-variable and the remaining valve(s) is phase-fixed, the variable valve train being configured such that a working angle of the phase-variable intake valve is larger than a working angle of the phase-fixed intake valve, wherein a valve-open timing of the phase-variable intake valve is retarded after a valve-open timing of the phase-fixed intake valve when the internal combustion engine is under low-load operating state.Type: ApplicationFiled: January 29, 2009Publication date: January 26, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daisaku Sawada, Eiichi Kamiyama, Takashi Kawasaki, Yukihiro Nakasaka, Daisuke Akihisa, Naoto Hisaminato
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Publication number: 20100282216Abstract: Provided is a spark ignition type internal combustion engine comprising a variable compression ratio mechanism (A) capable of changing a mechanical compression ratio, and a variable valve timing mechanism (B) capable of controlling the closing timing of an intake valve. At an engine low-load running time, the mechanical compression ratio is made so higher than that at an engine high-load running time that the expansion ratio may be 20 or higher. In case the vacuum in an engine intake passage is lower than the required vacuum, the opening of a throttle valve (17) is reduced, and the valve closing timing of the intake valve is controlled so that the intake air in a quantity according to the engine load may be fed to the inside of a combustion chamber in accordance with the opening of the throttle valve. As a result, a brake booster or the like can be properly activated in the internal combustion engine having its mechanical compression ratio enlarged at the engine low-load running time.Type: ApplicationFiled: November 6, 2008Publication date: November 11, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoto Hisaminato, Daisuke Akihisa, Eiichi Kamiyama, Yukihiro Nakasaka