Patents by Inventor Shigeji Nakano
Shigeji Nakano 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: 10890218Abstract: A hydraulic circuit includes a first shift valve and a second shift valve that are provided in series between a source oil path through which oil whose pressure has been regulated flows and a first clutch oil path and a second clutch oil path. The first shift valve is selectively switchable between a first switching state where a first communicating oil path and the first clutch oil path are communicated and a second switching state where a second communicating oil path and the second clutch oil path are communicated, and the second shift valve is selectively switchable between a third switching state where the source oil path and the first communicating oil path are communicated and a fourth switching state where the source oil path and the second communicating oil path are communicated.Type: GrantFiled: August 29, 2019Date of Patent: January 12, 2021Assignee: HONDA MOTOR CO., LTD.Inventors: Hisashi Ishikawa, Yuji Okazaki, Shigeji Nakano, Hideaki Iwashita, Yuya Shimota, Noriyuki Yagi, Yoshihiro Sato
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Patent number: 10746286Abstract: In a hydraulic control device, a hydraulic sensor is provided on an intake side of a second pump where first oil is taken in and a line pressure sensor is provided on a discharging side of the second pump where the second oil is discharged. A control unit controls driving of the second pump by controlling a motor on the basis of an output pressure detected by the output pressure sensor or a line pressure detected by the line pressure sensor.Type: GrantFiled: August 6, 2018Date of Patent: August 18, 2020Assignee: HONDA MOTOR CO., LTD.Inventors: Masamichi Harada, Kyohei Sakagami, Makito Nakasone, Shigeji Nakano
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Publication number: 20200227979Abstract: A rotary electric machine of the embodiment includes a stator including a cylindrical stator core, and a coil mounted on the stator core, and a rotor disposed radially inward of the stator, wherein the rotor includes a rotor core having a rotor internal flow path through which a refrigerant is able to flow by axial center cooling, and an end surface plate disposed at an end of the rotor core in an axial direction, and the end surface plate includes a refrigerant flow hole configured to communicate with the rotor internal flow path, and a surface treatment portion disposed at least between the refrigerant flow hole and an outer peripheral edge of the end surface plate, and a surface tension of the surface treatment portion is smaller than that of the end surface plate.Type: ApplicationFiled: January 9, 2020Publication date: July 16, 2020Inventors: Tadashi Yamaguchi, Toru Kishi, Shigeji Nakano, Motoshi Togasaki, Kentaro Yamaguchi
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Publication number: 20200072299Abstract: A hydraulic circuit includes a first shift valve and a second shift valve that are provided in series between a source oil path through which oil whose pressure has been regulated flows and a first clutch oil path and a second clutch oil path. The first shift valve is selectively switchable between a first switching state where a first communicating oil path and the first clutch oil path are communicated and a second switching state where a second communicating oil path and the second clutch oil path are communicated, and the second shift valve is selectively switchable between a third switching state where the source oil path and the first communicating oil path are communicated and a fourth switching state where the source oil path and the second communicating oil path are communicated.Type: ApplicationFiled: August 29, 2019Publication date: March 5, 2020Applicant: HONDA MOTOR CO., LTD.Inventors: Hisashi Ishikawa, Yuji Okazaki, Shigeji Nakano, Hideaki Iwashita, Yuya Shimota, Noriyuki Yagi, Yoshihiro Sato
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Patent number: 10514039Abstract: In a hydraulic control device, when the rotational speed of an electric motor is an appropriate rotational speed, a first spool is in a first position, in which communication between a sixth port and a second port is blocked. When the rotational speed of the electric motor exceeds the appropriate rotational speed, the first spool is in a second position, in which the sixth port and the second port are placed in communication.Type: GrantFiled: May 23, 2018Date of Patent: December 24, 2019Assignee: HONDA MOTOR CO., LTD.Inventors: Yasuyuki Ichimura, Shigeji Nakano, Satoshi Uchino
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Patent number: 10274078Abstract: A hydraulic circuit for a transmission including a main pump and a sub pump is provided in which when the main pump and the sub pump are driven by an engine after it has been stopped for a long time, due to the internal pressure of a torque converter being low, a sufficient hydraulic pressure cannot be transmitted to a feedback port of a switching valve via a fifth oil passage; communication between a first port and a second port of the switching valve is cut off, and the oil discharged by the sub pump is therefore not supplied to a lubrication system via a sixth oil passage but is supplied via the path: second oil passage?first port of switching valve?fourth oil passage?first port and second port of second pressure regulating valve?torque converter.Type: GrantFiled: January 29, 2015Date of Patent: April 30, 2019Assignee: HONDA MOTOR CO., LTD.Inventors: Yasuyuki Ichimura, Shigeji Nakano, Tomoaki Yageta
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Publication number: 20190048998Abstract: In a hydraulic control device, a hydraulic sensor is provided on an intake side of a second pump where first oil is taken in and a line pressure sensor is provided on a discharging side of the second pump where the second oil is discharged. A control unit controls driving of the second pump by controlling a motor on the basis of an output pressure detected by the output pressure sensor or a line pressure detected by the line pressure sensor.Type: ApplicationFiled: August 6, 2018Publication date: February 14, 2019Inventors: Masamichi Harada, Kyohei Sakagami, Makito Nakasone, Shigeji Nakano
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Publication number: 20180340538Abstract: In a hydraulic control device, when the rotational speed of an electric motor is an appropriate rotational speed, a first spool is in a first position, in which communication between a sixth port and a second port is blocked. When the rotational speed of the electric motor exceeds the appropriate rotational speed, the first spool is in a second position, in which the sixth port and the second port are placed in communication.Type: ApplicationFiled: May 23, 2018Publication date: November 29, 2018Inventors: Yasuyuki Ichimura, Shigeji Nakano, Satoshi Uchino
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Publication number: 20170009877Abstract: A hydraulic circuit for a transmission including a main pump and a sub pump is provided in which when the main pump and the sub pump are driven by an engine after it has been stopped for a long time, due to the internal pressure of a torque converter being low, a sufficient hydraulic pressure cannot be transmitted to a feedback port of a switching valve via a fifth oil passage; communication between a first port and a second port of the switching valve is cut off, and the oil discharged by the sub pump is therefore not supplied to a lubrication system via a sixth oil passage but is supplied via the path: second oil passage?first port of switching valve?fourth oil passage?first port and second port of second pressure regulating valve?torque converter.Type: ApplicationFiled: January 29, 2015Publication date: January 12, 2017Applicant: HONDA MOTOR CO., LTD.Inventors: Yasuyuki Ichimura, Shigeji Nakano, Tomoaki Yageta
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Publication number: 20110176909Abstract: A vehicle hydraulic control unit capable of preventing a vane from being pulled into a vane groove when a vane pump driven by an engine stops. The present hydraulic control unit supplies discharge oil in an external pump to a vane back pressure chamber of a vane pump, when an engine stops.Type: ApplicationFiled: September 23, 2010Publication date: July 21, 2011Applicants: SHOWA CORPORATION, HONDA MOTOR CO., LTD.Inventors: Naoya TAGA, Tomohiro TANAKA, Masayoshi TAKANO, Tomoaki ISHIKAWA, Hikaru KAWAI, Shigeji NAKANO, Katsuki TOJO, Eiji OYAMA
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Patent number: 7074148Abstract: A hydraulic controller of a power transmission device is equipped with a transmission for changing a rotation speed of motor power input from a motor and outputting the motor power; a forward/backward change-over mechanism provided between an input shaft, where the motor power of the motor is input and the transmission; and a torque converter having a direct coupling mechanism for transmitting the motor power between an output shaft and the input shaft of the motor; a solenoid valve for adjusting an original pressure and generating a control pressure; and a change-over element for changing over a hydraulic pressure supplied to the forward/backward change-over mechanism so as to become a low pressure during deceleration driving when the direct coupling mechanism is controlled by the solenoid valve, wherein any one of engagement states of the forward/backward change-over mechanism and the direct coupling mechanism is controlled by the control pressure.Type: GrantFiled: August 9, 2004Date of Patent: July 11, 2006Assignee: Honda Motor Co., Ltd.Inventors: Tomoaki Ishikawa, Shigeji Nakano, Kazunori Fujishima, Masaaki Yamaguchi, Tsuyoshi Fujita, Takao Ueno
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Publication number: 20050085340Abstract: A hydraulic controller of a power transmission device is equipped with a transmission for changing a rotation speed of motor power input from a motor and outputting the motor power; a forward/backward change-over mechanism provided between an input shaft, where the motor power of the motor is input and the transmission; and a torque converter having a direct coupling mechanism for transmitting the motor power between an output shaft and the input shaft of the motor; a solenoid valve for adjusting an original pressure and generating a control pressure; and a change-over element for changing over a hydraulic pressure supplied to the forward/backward change-over mechanism so as to become a low pressure during deceleration driving when the direct coupling mechanism is controlled by the solenoid valve, wherein any one of engagement states of the forward/backward change-over mechanism and the direct coupling mechanism is controlled by the control pressure.Type: ApplicationFiled: August 9, 2004Publication date: April 21, 2005Inventors: Tomoaki Ishikawa, Shigeji Nakano, Kazunori Fujishima, Masaaki Yamaguchi, Tsuyoshi Fujita, Takao Ueno
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Patent number: 6503169Abstract: An apparatus for controlling a power transmission device, having a lockup shift valve that changes the operating state and non-operating state of the lockup mechanism, and a regulator valve that is capable of changing the pressure (line pressure) of working oil used to operate a speed changer CVT between a low pressure and a high pressure, wherein changeover between a mode, where the lockup mechanism is operated and the line pressure is set to a low pressure, and a mode, where the lockup mechanism is not operated and the line pressure is set to a high pressure, is carried out by changing the output of ON and OFF signals from the first solenoid valve.Type: GrantFiled: February 27, 2001Date of Patent: January 7, 2003Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Shigeji Nakano, Junji Urano, Yoichi Sato
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Patent number: 6461271Abstract: A first side-pressure, that is supplied to cylinder 74 of the drive pulley 71 or to cylinder 78 of the driven pulley 75 as pressure determining the transmission torque capacity of continuously variable transmission mechanism 70, is supplied to a frictional engagement element, where it is used as the working hydraulic fluid pressure. The transmission torque capacity of the frictional engagement element is set to be somewhat lower than the transmission torque capacity of the continuously variable transmission mechanism.Type: GrantFiled: March 22, 2001Date of Patent: October 8, 2002Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Shigeji Nakano, Junji Urano, Yoichi Sato
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Publication number: 20010027143Abstract: A first side-pressure, that is supplied to cylinder 74 of the drive pulley 71 or to cylinder 78 of the driven pulley 75 as pressure determining the transmission torque capacity of continuously variable transmission mechanism 70, is supplied to a frictional engagement element, where it is used as the working hydraulic fluid pressure. The transmission torque capacity of the frictional engagement element is set to be somewhat lower than the transmission torque capacity of the continuously variable transmission mechanism.Type: ApplicationFiled: March 22, 2001Publication date: October 4, 2001Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Shigeji Nakano, Junji Urano, Yoichi Sato
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Publication number: 20010019984Abstract: The present invention relates to an apparatus for controlling a power transmission device, having a lockup shift valve that changes the operating state and non-operating state of the lockup mechanism, and a regulator valve that is capable of changing the pressure (line pressure) of working oil used to operate a speed changer CVT between a low pressure and a high pressure, wherein changeover between a mode, where the lockup mechanism is operated and the line pressure is set to a low pressure, and a mode, where the lockup mechanism is not operated and the line pressure is set to a high pressure, is carried out by changing the output of ON and OFF signals from the first solenoid valve.Type: ApplicationFiled: February 27, 2001Publication date: September 6, 2001Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Shigeji Nakano, Junji Urano