Patents by Inventor Junya Tachikawa
Junya Tachikawa 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: 10644413Abstract: A method for joining segments (electrical conductors) includes first and second joining steps. The first joining step includes welding a group of the segments including ends, such that the first group is welded to pairs of electrical conductors. The second joining step includes welding a second group of the segments including ends, which are composed of the segments whose ends are arranged in a column in the radial direction, such that the second group is welded to pairs of electrical conductors. The first group includes a segment as a first electrical conductor including the end which is located at the middle portion of a group of the segments including the ends in the radial direction. The second group includes a segment as a second electrical conductor including the end which crosses the first electrical conductor on the opposite sides with respect to the middle portion in the radial direction.Type: GrantFiled: December 11, 2017Date of Patent: May 5, 2020Assignee: HONDA MOTOR CO., LTD.Inventors: Takeshi Yanagisawa, Kenichiro Murata, Akifumi Sudo, Kazuhito Hiraga, Junya Tachikawa
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Publication number: 20180166796Abstract: A method for joining segments (electrical conductors) includes first and second joining steps. The first joining step includes welding a group of the segments including ends, such that the first group is welded to pairs of electrical conductors. The second joining step includes welding a second group of the segments including ends, which are composed of the segments whose ends are arranged in a column in the radial direction, such that the second group is welded to pairs of electrical conductors. The first group includes a segment as a first electrical conductor including the end which is located at the middle portion of a group of the segments including the ends in the radial direction. The second group includes a segment as a second electrical conductor including the end which crosses the first electrical conductor on the opposite sides with respect to the middle portion in the radial direction.Type: ApplicationFiled: December 11, 2017Publication date: June 14, 2018Inventors: Takeshi Yanagisawa, Kenichiro Murata, Akifumi Sudo, Kazuhito Hiraga, Junya Tachikawa
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Publication number: 20170346359Abstract: A air pressure adjuster includes: a rotary electric machine; a casing housing the rotary electric machine hermetically; and an in-casing air pressure adjuster for adjusting an internal air pressure using a drive force generated a difference between the internal air pressure and an outer pressure of the casing. The in-casing air pressure adjuster discharges the air from the inside of the casing to the outside of the casing when the internal air pressure is higher than the external air pressure by a first predetermined value.Type: ApplicationFiled: May 24, 2017Publication date: November 30, 2017Inventor: Junya Tachikawa
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Patent number: 9660506Abstract: An electric motor includes a housing, a rotor, a stator, a storage tank, and a communication passage. The stator has a stator core provided coaxially with the rotor to surround the rotor. The storage tank is provided at a lower portion of the housing to store lubricating oil and divided by the stator core into a first storage tank and a second storage tank. The communication passage is provided to communicate the first storage tank with the second storage tank. The communication passage, as seen in an axial direction, extends above an oil level of the lubricating oil stored in the first storage tank and the second storage tank such that an air flows between an upper portion of the first storage tank and an upper portion of the second storage tank.Type: GrantFiled: May 13, 2014Date of Patent: May 23, 2017Assignee: HONDA MOTOR CO., LTD.Inventors: Yusuke Yoshiizumi, Junya Tachikawa, Manabu Sakurada
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Publication number: 20140339934Abstract: An electric motor includes a housing, a rotor, a stator, a storage tank, and a communication passage. The stator has a stator core provided coaxially with the rotor to surround the rotor. The storage tank is provided at a lower portion of the housing to store lubricating oil and divided by the stator core into a first storage tank and a second storage tank. The communication passage is provided to communicate the first storage tank with the second storage tank. The communication passage, as seen in an axial direction, extends above an oil level of the lubricating oil stored in the first storage tank and the second storage tank such that an air flows between an upper portion of the first storage tank and an upper portion of the second storage tank.Type: ApplicationFiled: May 13, 2014Publication date: November 20, 2014Applicant: HONDA MOTOR CO., LTD.Inventors: Yusuke YOSHIIZUMI, Junya TACHIKAWA, Manabu SAKURADA
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Patent number: 8825307Abstract: In a control device of an electric vehicle, control unit switches energization such that a decrease in an output of a rotary electric machine in which a stall state is detected by stall state-detecting unit and an increase in an output of another rotary electric machine in which the stall state is not detected by the stall state-detecting unit are made to be the same.Type: GrantFiled: December 6, 2012Date of Patent: September 2, 2014Assignee: Honda Motor Co., Ltd.Inventor: Junya Tachikawa
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Publication number: 20130282220Abstract: In a control device of an electric vehicle, control unit switches energization such that a decrease in an output of a rotary electric machine in which a stall state is detected by stall state-detecting unit and an increase in an output of another rotary electric machine in which the stall state is not detected by the stall state-detecting unit are made to be the same.Type: ApplicationFiled: December 6, 2012Publication date: October 24, 2013Applicant: Honda Motor Co., Ltd.Inventor: Junya Tachikawa
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Patent number: 8007392Abstract: A second clutch (C2) which couples a carrier (Cr) of the compound planetary gear set (6) to a speed ring gear (Rf) of the single planetary gear set (5) is arranged between the single planetary gear set (5) and the compound planetary gear set (6). Then, a first clutch (C1) which couples a second sun gear (Sr2) of the compound planetary gear set (6) to a carrier (Cf) of the single planetary gear set (5), and a third clutch (C3) which couples a sun gear (Sr1) of the compound planetary gear set (6) to carrier (Cf) of the single planetary gear set (5) are arranged at the side of the compound planetary gear set (6) opposite to the single planetary gear set (5).Type: GrantFiled: January 28, 2009Date of Patent: August 30, 2011Assignee: Honda Motor Co., Ltd.Inventors: Soichi Sugino, Yoshinori Tanaka, Takuya Kurokawa, Junya Tachikawa
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Publication number: 20090192002Abstract: A second clutch (C2) which couples a carrier (Cr) of the compound planetary gear set (6) to a speed ring gear (Rf) of the single planetary gear set (5) is arranged between the single planetary gear set (5) and the compound planetary gear set (6). Then, a first clutch (C1) which couples a second sun gear (Sr2) of the compound planetary gear set (6) to a carrier (Cf) of the single planetary gear set (5), and a third clutch (C3) which couples a sun gear (Sr1) of the compound planetary gear set (6) to carrier (Cf) of the single planetary gear set (5) are arranged at the side of the compound planetary gear set (6) opposite to the single planetary gear set (5).Type: ApplicationFiled: January 28, 2009Publication date: July 30, 2009Applicant: HONDA MOTOR CO., LTD.Inventors: Soichi SUGINO, Yoshinori TANAKA, Takuya KUROKAWA, Junya TACHIKAWA
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Patent number: 7222552Abstract: A controller for a transmission capable of preventing an occurrence of a gear squeak caused by a malfunction of a synchronization mechanism. The voltage determination section 24 performs a shift operation of a transmission by determining a control input Vin to a shift motor 13 so as to match an actual position Psc of a coupling sleeve 6 grasped by an actual position grasping section 21 with a target position Psc_cmd of the coupling sleeve 6 set by a target position setting section 22.Type: GrantFiled: April 18, 2005Date of Patent: May 29, 2007Assignee: Honda Motor Co., Ltd.Inventors: Toshikazu Kouno, Eijiro Shimabukuro, Yuji Yasui, Junya Tachikawa
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Publication number: 20050230216Abstract: A controller for a transmission capable of preventing an occurrence of a gear squeak caused by a malfunction of a synchronization mechanism. The voltage determination section 24 performs a shift operation of a transmission by determining a control input Vin to a shift motor 13 so as to match an actual position Psc of a coupling sleeve 6 grasped by an actual position grasping section 21 with a target position Psc_cmd of the coupling sleeve 6 set by a target position setting section 22.Type: ApplicationFiled: April 18, 2005Publication date: October 20, 2005Applicant: HONDA MOTOR CO., LTD.Inventors: Toshikazu Kouno, Eijiro Shimabukuro, Yuji Yasui, Junya Tachikawa
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Patent number: 6949041Abstract: A vehicle driving system includes a pulley shaft synchronously rotating with a crankshaft of an engine, an auxiliary unit drive shaft driving an auxiliary unit, a planetary gear mechanism portion having elements such as a sun gear, a pinion carrier and a ring gear. The pulley shaft and the auxiliary unit drive shaft are adapted for connection to any two of the elements, respectively. The motor connecting to the remaining element of the planetary gear mechanism portion. A lock-up clutch connecting together the two or more elements of the planetary gear mechanism portion. A one-way clutch for restricting the rotation of the auxiliary unit drive shaft in one direction, wherein the planetary gear mechanism portion, the motor, the lock-up clutch, and the auxiliary unit drive shaft are coaxially disposed in line.Type: GrantFiled: October 3, 2003Date of Patent: September 27, 2005Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Masato Fujioka, Junya Tachikawa, Tatsuya Fukushima
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Patent number: 6845832Abstract: The present invention is made to operate auxiliary machine while an engine is stopped, to start an engine and to charge a battery by providing a single motor and a simple construction and by providing a simple control operation. An engine system comprises an engine, a motor, and auxiliary machine, and further comprises a planetary mechanism having three elements comprising a sun gear, a carrier and a ring gear, to which any one of an output shaft of the engine, an output shaft of the motor and a drive shaft of the auxiliary machine are respectively connected, a uniting connection device capable of uniting two or more elements of the planetary mechanism, and a rotation direction restriction device which restricts a rotation direction of the drive shaft of the auxiliary machine to one direction.Type: GrantFiled: November 18, 2002Date of Patent: January 25, 2005Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Kazuaki Takizawa, Tatsuya Fukushima, Katsuya Minami, Masato Fujioka, Kazuo Ooyama, Eijiro Shimabukuro, Junya Tachikawa
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Publication number: 20040116227Abstract: A vehicle driving system includes a pulley shaft synchronously rotating with a crankshaft of an engine, an auxiliary unit drive shaft driving an auxiliary unit, a planetary gear mechanism portion having elements such as a sun gear, a pinion carrier and a ring gear. The pulley shaft and the auxiliary unit drive shaft are adapted for connection to any two of the elements, respectively. The motor connecting to the remaining element of the planetary gear mechanism portion. A lock-up clutch connecting together the two or more elements of the planetary gear mechanism portion. A one-way clutch for restricting the rotation of the auxiliary unit drive shaft in one direction, wherein the planetary gear mechanism portion, the motor, the lock-up clutch, and the auxiliary unit drive shaft are coaxially disposed in line.Type: ApplicationFiled: October 3, 2003Publication date: June 17, 2004Inventors: Masato Fujioka, Junya Tachikawa, Tatsuya Fukushima
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Patent number: 6736099Abstract: A hydraulic engine-starting system for cranking and starting an engine for a vehicle having automatically stopping and starting functions by a hydraulic motor. A hydraulic pressure that operates a hydraulic clutch of a transmission is raised promptly by using a hydraulic motor. The hydraulic motor is driven by a hydraulic pressure supplied thereto through a first oil passage from a hydraulic motor-driving device including an oil pump, an accumulator and a solenoid valve, thereby starting the engine. A transmission is disposed in the middle of a second oil passage for returning an oil discharged from the hydraulic motor to the hydraulic motor-driving device. Thus, the hydraulic pressure in the transmission can be raised simultaneously with the start of the engine to enable the engagement of a hydraulic clutch, thereby starting the vehicle promptly, while avoiding generating a shock from the engagement of the hydraulic clutch.Type: GrantFiled: May 9, 2002Date of Patent: May 18, 2004Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Ryuichi Mori, Junya Tachikawa, Koichi Fushimi
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Patent number: 6705266Abstract: A starter for an internal combustion engine is provided for improving the startability and reducing noise associated with starting. The starter for an internal combustion engine comprises an electric motor, an oil pump driven by the electric motor, an accumulator for accumulating an oil pressure pumped by the oil pump, a hydraulic actuator driven by the oil pressure accumulated in the accumulator, an oil pressure supply control valve for controlling the oil pressure supplied from the accumulator to the hydraulic actuator, a driven gear for rotation integral with a crank shaft of the internal combustion engine, a driving gear connected to the hydraulic actuator, and brought into mesh with the driven gear and driven by the hydraulic actuator when the internal combustion engine is started, an oil pressure sensor for detecting the oil pressure in the accumulator, and an ECU for controlling the electric motor based on the value of the oil pressure in the accumulator detected by the oil pressure sensor.Type: GrantFiled: April 5, 2002Date of Patent: March 16, 2004Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Junya Tachikawa, Ryuichi Mori, Koichi Fushimi
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Patent number: 6615786Abstract: There is provided a starter system for an internal combustion engine, which is capable of preventing wear of a brush of an electric motor ascribable to the combined use of the electric motor with a hydraulic actuator and the resulting increase in the rotational resistance due to friction of the brush, as well as capable of using one of the hydraulic actuator and the electric motor without difficulty even when the other is disabled. The hydraulic motor is driven by hydraulic pressure. A rotational shaft of the hydraulic motor is driven for rotation by the hydraulic motor. A rotational shaft of an electric motor extends in parallel with the rotational shaft of the hydraulic motor, and is driven for rotation by the electric motor. A ring gear rotates in unison with the crankshaft. A pinion gear is brought into meshing engagement with the ring gear, for starting the engine. An output shaft is connected to the pinion gear.Type: GrantFiled: April 17, 2002Date of Patent: September 9, 2003Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Ryuichi Mori, Junya Tachikawa, Koichi Fushimi
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Publication number: 20030094317Abstract: The present invention is made to operate auxiliary machine while an engine is stopped, to start an engine and to charge a battery by providing a single motor and a simple construction and by providing a simple control operation. An engine system comprises an engine, a motor, and auxiliary machine, and further comprises a planetary mechanism having three elements comprising a sun gear, a carrier and a ring gear, to which any one of an output shaft of the engine, an output shaft of the motor and a drive shaft of the auxiliary machine are respectively connected, a uniting connection device capable of uniting two or more elements of the planetary mechanism, and a rotation direction restriction device which restricts a rotation direction of the drive shaft of the auxiliary machine to one direction.Type: ApplicationFiled: November 18, 2002Publication date: May 22, 2003Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHAInventors: Kazuaki Takizawa, Tatsuya Fukushima, Katsuya Minami, Masato Fujioka, Kazuo Ooyama, Eijiro Shimabukuro, Junya Tachikawa
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Publication number: 20030000492Abstract: A hydraulic engine-starting system for cranking and starting an engine for a vehicle having automatically stopping and starting functions by a hydraulic motor. A hydraulic pressure that operates a hydraulic clutch of a transmission is raised promptly by using a hydraulic motor. The hydraulic motor is driven by a hydraulic pressure supplied thereto through a first oil passage from a hydraulic motor-driving device including an oil pump, an accumulator and a solenoid valve, thereby starting the engine. A transmission is disposed in the middle of a second oil passage for returning an oil discharged from the hydraulic motor to the hydraulic motor-driving device. Thus, the hydraulic pressure in the transmission can be raised simultaneously with the start of the engine to enable the engagement of a hydraulic clutch, thereby starting the vehicle promptly, while avoiding generating a shock from the engagement of the hydraulic clutch.Type: ApplicationFiled: May 9, 2002Publication date: January 2, 2003Inventors: Ryuichi Mori, Junya Tachikawa, Koichi Fushimi
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Publication number: 20020166530Abstract: A starter for an internal combustion engine is provided for improving the startability and reducing noise associated with starting. The starter for an internal combustion engine comprises an electric motor, an oil pump driven by the electric motor, an accumulator for accumulating an oil pressure pumped by the oil pump, a hydraulic actuator driven by the oil pressure accumulated in the accumulator, an oil pressure supply control valve for controlling the oil pressure supplied from the accumulator to the hydraulic actuator, a driven gear for rotation integral with a crank shaft of the internal combustion engine, a driving gear connected to the hydraulic actuator, and brought into mesh with the driven gear and driven by the hydraulic actuator when the internal combustion engine is started, an oil pressure sensor for detecting the oil pressure in the accumulator, and an ECU for controlling the electric motor based on the value of the oil pressure in the accumulator detected by the oil pressure sensor.Type: ApplicationFiled: April 5, 2002Publication date: November 14, 2002Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHAInventors: Junya Tachikawa, Ryuichi Mori, Koichi Fushimi