Patents by Inventor Morihiro Nagamine
Morihiro Nagamine 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: 11208094Abstract: A hybrid vehicle has an engine (E) that is capable of changing a combustion mode between a stoichiometric combustion mode and a lean combustion mode and a motor/generator (MG) that is capable of performing torque assist by a power running operation and torque absorption by a regenerative operation. As a boundary between a stoichiometric combustion operating region and a lean combustion operating region, a second boundary (L2) at a torque decrease has a hysteresis at a low torque side with respect to a first boundary (L1) at a torque increase. Upon shift from the stoichiometric combustion operating region to the lean combustion operating region, for delay in increase of an intake-air quantity, decrease in fuel and the torque assist by the motor/generator (MG) are carried out, and an exhaust air-fuel ratio is changed stepwise.Type: GrantFiled: October 12, 2017Date of Patent: December 28, 2021Assignee: NISSAN MOTOR CO., LTD.Inventors: Morihiro Nagamine, Hiromu Terai, Takeshi Watanabe, Atsushi Teraji, Hiroyuki Suzuki
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Publication number: 20200398818Abstract: A hybrid vehicle has an engine (E) that is capable of changing a combustion mode between a stoichiometric combustion mode and a lean combustion mode and a motor/generator (MG) that is capable of performing torque assist by a power running operation and torque absorption by a regenerative operation. As a boundary between a stoichiometric combustion operating region and a lean combustion operating region, a second boundary (L2) at a torque decrease has a hysteresis at a low torque side with respect to a first boundary (L1) at a torque increase. Upon shift from the stoichiometric combustion operating region to the lean combustion operating region, for delay in increase of an intake-air quantity, decrease in fuel and the torque assist by the motor/generator (MG) are carried out, and an exhaust air-fuel ratio is changed stepwise.Type: ApplicationFiled: October 12, 2017Publication date: December 24, 2020Applicant: NISSAN MOTOR CO., LTD.Inventors: Morihiro NAGAMINE, Hiromu TERAI, Takeshi WATANABE, Atsushi TERAJI, Hiroyuki SUZUKI
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Patent number: 9963141Abstract: A hybrid vehicle control device is provided with at least one controller programmed to control outputs of the engine and the electric motor, an engagement and disengagement of the clutch, and a transmission ratio of the continuously variable transmission in accordance with a driving state. The at least one controller is further programmed to restart the engine while maintaining a released state of the clutch, and downshift the continuously variable transmission to a predetermined transmission ratio for passing over the level difference upon determining that the level difference is present while traveling by a drive force of the motor with the clutch released and the engine stopped.Type: GrantFiled: January 28, 2015Date of Patent: May 8, 2018Assignee: Nissan Motor Co., Ltd.Inventors: Akihiro Yamamoto, Morihiro Nagamine, Akira Takano, Shintaro Oshio, Yoshihisa Kodama, Takuro Hirano, Yukifumi Otsuka
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Patent number: 9758158Abstract: A hybrid vehicle control device is provided with at least one controller that controls the outputs of the engine and of the motor according to the driving state, the engagement and disengagement of the clutch, and the transmission ratio of the continuously variable transmission. The at least one controller is programmed to start the engine and forcibly downshift the continuously variable transmission to a transmission ratio with which it is possible to start on an uphill road upon determining that the vehicle is on an uphill road while in an electric vehicle mode in which it is possible to travel by the drive force of the motor with the clutch released and the engine stopped.Type: GrantFiled: January 28, 2015Date of Patent: September 12, 2017Assignee: Nissan Motor Co., Ltd.Inventors: Akihiro Yamamoto, Morihiro Nagamine, Akira Takano, Shintaro Oshio, Yoshihisa Kodama, Takuro Hirano, Yukifumi Otsuka
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Patent number: 9616883Abstract: A hybrid vehicle includes a mechanical oil pump that is driven by an engine and an electric oil pump that is driven by an electric motor, and is configured to activate the electric oil pump when traveling in an electric traveling mode, in which the engine is stopped and traveling is executed by a driving force from a driving motor.Type: GrantFiled: March 14, 2014Date of Patent: April 11, 2017Assignees: Nissan Motor Co., Ltd., JATCO LTDInventors: Morihiro Nagamine, Akira Takano, Shintaro Oshio, Takuro Hirano, Yoshihisa Kodama, Akihiro Yamamoto
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Publication number: 20170066437Abstract: A hybrid vehicle control device is provided with at least one controller programmed to control outputs of the engine and the electric motor, an engagement and disengagement of the clutch, and a transmission ratio of the continuously variable transmission in accordance with a driving state. The at least one controller is further programmed to restart the engine while maintaining a released state of the clutch, and downshift the continuously variable transmission to a predetermined transmission ratio for passing over the level difference upon determining that the level difference is present while traveling by a drive force of the motor with the clutch released and the engine stopped.Type: ApplicationFiled: January 28, 2015Publication date: March 9, 2017Inventors: Akihiro YAMAMOTO, Morihiro NAGAMINE, Akira TAKANO, Shintaro OSHIO, Yoshihisa KODAMA, Takuro HIRANO, Yukifumi OTSUKA
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Publication number: 20170015301Abstract: A hybrid vehicle control device is provided with at least one controller that controls the outputs of the engine and of the motor according to the driving state, the engagement and disengagement of the clutch, and the transmission ratio of the continuously variable transmission. The at least one controller is programmed to start the engine and forcibly downshift the continuously variable transmission to a transmission ratio with which it is possible to start on an uphill road upon determining that the vehicle is on an uphill road while in an electric vehicle mode in which it is possible to travel by the drive force of the motor with the clutch released and the engine stopped.Type: ApplicationFiled: January 28, 2015Publication date: January 19, 2017Inventors: Akihiro YAMAMOTO, Morihiro NAGAMINE, Akira TAKANO, Shintaro OSHIO, Yoshihisa KODAMA, Takuro HIRANO, Yukifumi OTSUKA
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Patent number: 9415771Abstract: A control device in a hybrid vehicle includes a controller capable of switching, between an operating state and a non-operating state, a fuel-cut recovery control in which engine rotation speed is kept at or above a predetermined rotation speed by starting supply of fuel upon the engine rotation speed falling to the predetermined rotation speed from a state in which the engine rotation speed is higher than the predetermined rotation speed and the supply of fuel is stopped.Type: GrantFiled: October 30, 2013Date of Patent: August 16, 2016Assignee: Nissan Motor Co., Ltd.Inventors: Shunsuke Shigemoto, Morihiro Nagamine
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Publication number: 20160229391Abstract: A control device in a hybrid vehicle includes a controller capable of switching, between an operating state and a non-operating state, a fuel-cut recovery control in which engine rotation speed is kept at or above a predetermined rotation speed by starting supply of fuel upon the engine rotation speed falling to the predetermined rotation speed from a state in which the engine rotation speed is higher than the predetermined rotation speed and the supply of fuel is stopped.Type: ApplicationFiled: October 30, 2013Publication date: August 11, 2016Inventors: Shunsuke SHIGEMOTO, Morihiro NAGAMINE
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Publication number: 20160009273Abstract: A hybrid vehicle includes a mechanical oil pump that is driven by an engine and an electric oil pump that is driven by an electric motor, and is configured to activate the electric oil pump when traveling in an electric traveling mode, in which the engine is stopped and traveling is executed by a driving force from a driving motor.Type: ApplicationFiled: March 14, 2014Publication date: January 14, 2016Applicants: NISSAN MOTOR CO., LTD., JATCO LTDInventors: Morihiro NAGAMINE, Akira TAKANO, Shintaro OSHIO, Takuro HIRANO, Yoshihisa KODAMA, Akihiro YAMAMOTO
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Patent number: 7438043Abstract: An internal combustion engine is provided that basically comprises a cylinder block, a cylinder head, a piston, an auxiliary chamber partition wall and a spark plug. The auxiliary chamber partition wall is coupled to the cylinder head and extending toward the main chamber to form an auxiliary combustion chamber inside an area enclosed by the auxiliary chamber partition wall. The auxiliary chamber partition wall has at least one jet aperture through which the auxiliary combustion chamber fluidly communicates with the main combustion chamber. A tip portion of the auxiliary chamber partition wall that faces toward the piston has a smaller wall thickness than other portion of the auxiliary chamber partition wall.Type: GrantFiled: October 17, 2006Date of Patent: October 21, 2008Assignee: Nissan Motor Co., Ltd.Inventors: Taisuke Shiraishi, Akihiko Kakuho, Eiji Takahashi, Morihiro Nagamine
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Patent number: 7392795Abstract: An internal combustion engine is provided that basically comprises a combustion chamber, an electric discharge unit and a controller. The combustion chamber receives a mixture of fuel and air that is caused to undergo compression self ignition. The electric discharge unit is provided inside the combustion chamber to generate an electric discharge for conducting combustion inside the combustion chamber. The controller is configured to control a voltage applied to the electric discharge unit. The controller is configured to control the electric discharge unit such that a non-thermal plasma can be formed without incurring a transition to arc discharging, and to control the quantity and distribution of an activated air-fuel mixture inside the combustion chamber in accordance with an operating condition of the internal combustion engine.Type: GrantFiled: May 16, 2007Date of Patent: July 1, 2008Assignee: Nissan Motor Co., Ltd.Inventors: Morihiro Nagamine, Akihiko Kakuho, Taisuke Shiraishi, Eiji Takahashi
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Patent number: 7334573Abstract: A NOx emission reduction apparatus includes high-temperature EGR gas supply means for supplying a high-temperature EGR gas into an engine cylinder, low-temperature EGR gas supply means for supplying a low-temperature EGR gas into the engine cylinder and very-low-load operation control means for, as an engine load decreases in a very-low-load range, increasing an EGR rate of the high-temperature EGR gas and decreasing an EGR rate of the low-temperature EGR gas for stable engine operations and NOx emission reduction.Type: GrantFiled: March 12, 2007Date of Patent: February 26, 2008Assignee: Nissan Motor Co., Ltd.Inventors: Taisuke Shiraishi, Koji Hiraya, Akihiko Kakuho, Morihiro Nagamine, Daisuke Tanaka
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Publication number: 20070266979Abstract: An internal combustion engine is provided that basically comprises a combustion chamber, an electric discharge unit and a controller. The combustion chamber receives a mixture of fuel and air that is caused to undergo compression self ignition. The electric discharge unit is provided inside the combustion chamber to generate an electric discharge for conducting combustion inside the combustion chamber. The controller is configured to control a voltage applied to the electric discharge unit. The controller is configured to control the electric discharge unit such that a non-thermal plasma can be formed without incurring a transition to arc discharging, and to control the quantity and distribution of an activated air-fuel mixture inside the combustion chamber in accordance with an operating condition of the internal combustion engine.Type: ApplicationFiled: May 16, 2007Publication date: November 22, 2007Applicant: NISSAN MOTOR CO., LTD.Inventors: Morihiro NAGAMINE, Akihiko KAKUHO, Taisuke SHIRAISHI, Eiji TAKAHASHI
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Publication number: 20070215126Abstract: A NOx emission reduction apparatus includes high-temperature EGR gas supply means for supplying a high-temperature EGR gas into an engine cylinder, low-temperature EGR gas supply means for supplying a low-temperature EGR gas into the engine cylinder and very-low-load operation control means for, as an engine load decreases in a very-low-load range, increasing an EGR rate of the high-temperature EGR gas and decreasing an EGR rate of the low-temperature EGR gas for stable engine operations and NOx emission reduction.Type: ApplicationFiled: March 12, 2007Publication date: September 20, 2007Inventors: Taisuke Shiraishi, Koji Hiraya, Akihiko Kakuho, Morihiro Nagamine, Daisuke Tanaka
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Publication number: 20070089703Abstract: An internal combustion engine is provided that basically comprises a cylinder block, a cylinder head, a piston, an auxiliary chamber partition wall and a spark plug. The auxiliary chamber partition wall is coupled to the cylinder head and extending toward the main chamber to form an auxiliary combustion chamber inside an area enclosed by the auxiliary chamber partition wall. The auxiliary chamber partition wall has at least one jet aperture through which the auxiliary combustion chamber fluidly communicates with the main combustion chamber. A tip portion of the auxiliary chamber partition wall that faces toward the piston has a smaller wall thickness than other portion of the auxiliary chamber partition wall.Type: ApplicationFiled: October 17, 2006Publication date: April 26, 2007Applicant: Nissan Motor Co., Ltd.Inventors: Taisuke Shiraishi, Akihiko Kakuho, Eiji Takahashi, Morihiro Nagamine