Patents by Inventor Takafumi Inagaki
Takafumi Inagaki 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: 11078851Abstract: A control device of a vehicle includes between an engine and an automatic transmission a fluid transmission device transmitting power from a pump impeller coupled to the engine via a fluid to a turbine impeller coupled to the automatic transmission. The control device determines occurrence of a lost-drive state of the fluid transmission device based on an increase amount of a rotation speed of the engine after a predetermined time during start of the engine.Type: GrantFiled: June 24, 2019Date of Patent: August 3, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoichi Nakashima, Motoaki Kamimura, Atsushi Muto, Takafumi Inagaki
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Patent number: 10724373Abstract: A vane oil pump includes a rotor including a plurality of slits, a housing having an inner circumferential cam surface such that a first pump unit and a second pump unit taking in and discharging oil in accordance with rotation of the rotor are separately disposed in a rotational direction of the rotor, a plurality of vanes respectively fitted in the slits of the rotor, and a pressure adjusting device configured to adjust a second discharge pressure of the second pump unit to a lower pressure than a first discharge pressure of the first pump unit. A back pressure groove is disposed on the housing and is provided to supply back pressure oil to a bottom portion of each slit.Type: GrantFiled: October 25, 2017Date of Patent: July 28, 2020Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Takafumi Inagaki, Yoshinobu Soga, Shuji Moriyama, Yusuke Ohgata, Yuji Hattori, Kazumichi Tsukuda, Akihiko Noborio
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Patent number: 10663032Abstract: In a torsional vibration reducing device, a protrusion projecting radially outward of the rotating body is formed on an inner wall surface. The protrusion is formed on a rotation direction side of a rotating body relative to a straight line passing through a rotation center of the rotating body and a center of a rolling element when the rolling element is located in a middle between both end positions to which the rolling element swings within the roller chamber, and while the rolling element is located at an end portion of a roller chamber on the rotation direction side of the rotating body, a gap is equal to or less than a predetermined value between the rolling element and a wall surface of the roller chamber on a straight line passing through a rotation center of the rotating body and a tip of the protrusion.Type: GrantFiled: October 31, 2018Date of Patent: May 26, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takafumi Inagaki, Toshiya Yamashita, Takuya Okada, Atsushi Muto, Masahiro Shirakawa, Yusuke Suzuki
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Patent number: 10641266Abstract: A transfer device that includes a case that houses a transfer mechanism; a strainer that suctions oil stored in a lower portion of the case; a valve body that has a hydraulic supply circuit that supplies a hydraulic pressure to the transfer mechanism and a suction oil path that discharges an extra hydraulic pressure that is extra for the hydraulic supply circuit; a first suction inlet that communicates with one of the suction oil path and the strainer and a second suction inlet that communicates with the other of the suction oil path and the strainer, and a balanced vane pump.Type: GrantFiled: January 6, 2016Date of Patent: May 5, 2020Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsuhiro Takeda, Yoshihiro Mizuno, Tetsuya Kohno, Yoshinobu Soga, Syuji Moriyama, Hiromitsu Nitani, Takafumi Inagaki
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Patent number: 10626989Abstract: A hydraulic control device where the engagement pressure which is supplied from the first solenoid valve is supplied to the synchronization mechanism in the case where the signal pressure is not supplied to the switching valve, and the engagement pressure which is supplied from the first solenoid valve is supplied to the engagement element and the source pressure is supplied to the synchronization mechanism as the engagement pressure in the case where the signal pressure is supplied to the switching valve.Type: GrantFiled: July 14, 2015Date of Patent: April 21, 2020Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenichi Tsuchida, Toshiaki Hayashi, Masafumi Takasu, Yuta Seriguchi, Masashi Takizawa, Syuji Moriyama, Takafumi Inagaki, Yoshinobu Soga, Yoshihiro Mizuno, Hiromitsu Nitani
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Patent number: 10557547Abstract: A hydraulic control device includes: a pressure regulation valve that regulates a hydraulic pressure of oil supplied from an oil pump; a discharge oil passage through which the oil discharged from a fluid coupling flows when a lockup clutch is disengaged; a lubrication oil passage that supplies the oil from the discharge oil passage to a location to be lubricated; a return oil passage that returns the oil drained from the pressure regulation valve to a suction port of the oil pump; a connection oil passage that connects the lubrication oil passage and the return oil passage; and a flow direction regulation valve that is provided in the connection oil passage.Type: GrantFiled: March 7, 2017Date of Patent: February 11, 2020Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenichi Tsuchida, Toshiaki Hayashi, Yoichiro Kimura, Syuji Moriyama, Yoshinobu Soga, Hiromitsu Nitani, Takafumi Inagaki, Tetsuya Yamamoto
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Publication number: 20190390617Abstract: A control device of a vehicle includes between an engine and an automatic transmission a fluid transmission device transmitting power from a pump impeller coupled to the engine via a fluid to a turbine impeller coupled to the automatic transmission. The control device determines occurrence of a lost-drive state of the fluid transmission device based on an increase amount of a rotation speed of the engine after a predetermined time during start of the engine.Type: ApplicationFiled: June 24, 2019Publication date: December 26, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoichi NAKASHIMA, Motoaki KAMIMURA, Atsushi MUTO, Takafumi INAGAKI
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Patent number: 10428936Abstract: A hydraulic control device that includes a source pressure generating valve that generates a source pressure; a solenoid valve that can supply the engagement pressure based on the source pressure; and a supply pressure switching valve that can be switched between a first state where the supply pressure switching valve can supply the engagement pressure to the second engagement element and a second state where the supply pressure switching valve can supply the source pressure to the second engagement element, the supply pressure switching valve being in the first state when the solenoid valve is operating normally, and being switched to the second state in case of abnormality in the solenoid valve.Type: GrantFiled: August 19, 2016Date of Patent: October 1, 2019Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenichi Tsuchida, Toshiaki Hayashi, Yuta Seriguchi, Masafumi Takasu, Yoichiro Kimura, Kenichi Ishii, Syuji Moriyama, Yoshinobu Soga, Hiromitsu Nitani, Takafumi Inagaki
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Patent number: 10295048Abstract: A vehicle transmission having a valve body disposed adjacently to and in parallel with a side cover covering a front or rear side or a side surface of a transmission case in a vehicle width direction in a vehicle-mounted state, the side cover connected to the transmission case, in which an electromagnetic valve is included on the side cover side of the valve body, when viewed in a direction horizontal and parallel to mating surfaces of the transmission case and the side cover, a strainer for removing a foreign material in a hydraulic oil is disposed between the side cover and the valve body to overlap with at least a portion of the electromagnetic valve, and the strainer has an inflow portion for allowing the hydraulic oil to flow in disposed vertically above an oil surface.Type: GrantFiled: August 18, 2015Date of Patent: May 21, 2019Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Shuji Moriyama, Takafumi Inagaki, Yoshinobu Soga, Yoshihiro Mizuno, Hiromitsu Nitani, Yuji Iwatsuru
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Publication number: 20190128369Abstract: In a torsional vibration reducing device, a protrusion projecting radially outward of the rotating body is firmed on an inner wall surface. The protrusion is formed on a rotation direction side of a rotating body relative to a straight line passing through a rotation center of the rotating body and a center of a rolling element when the rolling element is located in a middle between both end positions to which the rolling element swings within the roller chamber, and while the rolling element is located at an end portion of a roller chamber on the rotation direction side of the rotating body, a gap is equal to or less than a predetermined value between the rolling element and a wall surface of the roller chamber on a straight line passing through a rotation center of the rotating body and a tip of the protrusion.Type: ApplicationFiled: October 31, 2018Publication date: May 2, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takafumi INAGAKI, Toshiya YAMASHITA, Takuya OKADA, Atsushi MUTO, Masahiro SHIRAKAWA, Yusuke SUZUKI
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Patent number: 10260623Abstract: A vehicle transmission having a valve body disposed adjacently to and in parallel with a side cover covering a front or rear side or a side surface of a transmission case in a vehicle width direction in a vehicle-mounted state, the side cover connected to the transmission case, in which an electromagnetic valve is included on the side cover side of the valve body, when viewed in a direction horizontal and parallel to mating surfaces of the transmission case and the side cover, a strainer for removing a foreign material in a hydraulic oil is disposed between the side cover and the valve body to overlap with at least a portion of the electromagnetic valve, and the strainer has an inflow portion for allowing the hydraulic oil to flow in disposed vertically above an oil surface.Type: GrantFiled: August 18, 2015Date of Patent: April 16, 2019Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Shuji Moriyama, Takafumi Inagaki, Yoshinobu Soga, Yoshihiro Mizuno, Hiromitsu Nitani, Yuji Iwatsuru
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Publication number: 20190063598Abstract: A hydraulic control device includes: a pressure regulation valve that regulates a hydraulic pressure of oil supplied from an oil pump; a discharge oil passage through which the oil discharged from a fluid coupling flows when a lockup clutch is disengaged; a lubrication oil passage that supplies the oil from the discharge oil passage to a location to be lubricated; a return oil passage that returns the oil drained from the pressure regulation valve to a suction port of the oil pump; a connection oil passage that connects the lubrication oil passage and the return oil passage; and a flow direction regulation valve that is provided in the connection oil passage.Type: ApplicationFiled: March 7, 2017Publication date: February 28, 2019Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenichi TSUCHIDA, Toshiaki HAYASHI, Yoichiro KIMURA, Syuji MORIYAMA, Yoshinobu SOGA, Hiromitsu NITANI, Takafumi INAGAKI, Tetsuya YAMAMOTO
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Patent number: 10174822Abstract: A hydraulic control device for an automatic transmission where the spool is locked at the first position and the switching pressure can regulate the belt holding force of the primary pulley or the secondary pulley without switching a position of the spool when the engagement pressure is supplied to the second working oil chamber, and the spool is not locked at the first position and the switching pressure can switch the spool to the second position against the urging member when the engagement pressure is not supplied to the second working oil chamber.Type: GrantFiled: July 6, 2015Date of Patent: January 8, 2019Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenichi Tsuchida, Toshiaki Hayashi, Masafumi Takasu, Yuta Seriguchi, Masashi Takizawa, Takafumi Inagaki, Yoshinobu Soga, Syuji Moriyama, Yoshihiro Mizuno, Hiromitsu Nitani
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Patent number: 10139000Abstract: A hydraulic control system stably controls pressure in a hydraulic chamber of a pulley accommodating a belt by controlling a feeding valve and a discharging valve. The control system reduces a control amount of the feeding valve to be smaller than that calculated based on a pressure difference in a case other than one in which pressure in the hydraulic chamber is increased by delivering oil to another chamber, in case the pressure in the hydraulic chamber is increased by delivering the oil to the other chamber. The control system reduces a control amount of the discharging valve to be smaller than that calculated based on the pressure difference in a case other than one in which pressure in the hydraulic chamber is lowered by discharging the oil from the other chamber, in case the pressure in the hydraulic chamber is lowered by discharging the oil to the other chamber.Type: GrantFiled: April 9, 2013Date of Patent: November 27, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuji Hattori, Kenta Kimura, Takafumi Inagaki, Yuu Nagasato
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Publication number: 20180202541Abstract: A hydraulic control device that includes a source pressure generating valve that generates a source pressure; a solenoid valve that can supply the engagement pressure based on the source pressure; and a supply pressure switching valve that can be switched between a first state where the supply pressure switching valve can supply the engagement pressure to the second engagement element and a second state where the supply pressure switching valve can supply the source pressure to the second engagement element, the supply pressure switching valve being in the first state when the solenoid valve is operating normally, and being switched to the second state in case of abnormality in the solenoid valve.Type: ApplicationFiled: August 19, 2016Publication date: July 19, 2018Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenichi TSUCHIDA, Toshiaki HAYASHI, Yuta SERIGUCHI, Masafumi TAKASU, Yoichiro KIMURA, Kenichi ISHII, Syuji MORIYAMA, Yoshinobu SOGA, Hiromitsu NITANI, Takafumi INAGAKI
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Patent number: 9982775Abstract: Ground wires are shared between a drive-side pulley solenoid valve and a driven-side pulley solenoid valve. Therefore, when a disconnection or short circuit occurs in the shared portion, a drive-side pulley and a driven-side pulley show substantially the same behavior. As a result, changes in the speed ratio ?cvt of a continuously variable transmission are suppressed and changes in vehicle behavior are also suppressed. Therefore, it is possible to suppress the degradation of drivability during the failure of the solenoid valves involved in power transmission.Type: GrantFiled: September 7, 2015Date of Patent: May 29, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takafumi Inagaki, Yoshinobu Soga, Shuji Moriyama, Yoshihiro Mizuno, Hiromitsu Nitani
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Publication number: 20180128107Abstract: A vane oil pump includes a rotor including a plurality of slits, a housing having an inner circumferential cam surface such that a first pump unit and a second pump unit taking in and discharging oil in accordance with rotation of the rotor are separately disposed in a rotational direction of the rotor, a plurality of vanes respectively fitted in the slits of the rotor, and a pressure adjusting device configured to adjust a second discharge pressure of the second pump unit to a lower pressure than a first discharge pressure of the first pump unit. A back pressure groove is disposed on the housing and is provided to supply back pressure oil to a bottom portion of each slit.Type: ApplicationFiled: October 25, 2017Publication date: May 10, 2018Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Takafumi INAGAKI, Yoshinobu SOGA, Shuji MORIYAMA, Yusuke OHGATA, Yuji HATTORI, Kazumichi TUKUDA, Akihiko NOBORIO
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Patent number: 9890853Abstract: A hydraulic control device has: a modulator valve using oil pressure from a hydraulic source for adjusting a modulator pressure; driving and driven-side hydraulic actuator control valves controlling hydraulic oil from the source to driving and driven-side hydraulic actuators; a driving-side control oil pressure adjusting electromagnetic valve using the modulator pressure for outputting a control oil pressure controlling the driving-side control valve; and a driven-side control oil pressure adjusting electromagnetic valve for outputting a control oil pressure controlling the driven-side control valve, the hydraulic control device including a failsafe valve switched from a normal to a failure position based on a failure disabling electric control for the driving-side and driven-side electromagnetic valves, the modulator valve making the modulator pressure lower than a value at the normal position based on an output switching pressure generated due to switching the failsafe valve from the normal to the failure pType: GrantFiled: July 18, 2016Date of Patent: February 13, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shuji Moriyama, Yoshinobu Soga, Yoshihiro Mizuno, Hiromitsu Nitani, Takafumi Inagaki, Kenichi Tsuchida, Toshiaki Hayashi, Yuta Seriguchi, Masafumi Takasu, Yoichiro Kimura, Masashi Takizawa
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Publication number: 20170356444Abstract: A transfer device that includes a case that houses a transfer mechanism; a strainer that suctions oil stored in a lower portion of the case; a valve body that has a hydraulic supply circuit that supplies a hydraulic pressure to the transfer mechanism and a suction oil path that discharges an extra hydraulic pressure that is extra for the hydraulic supply circuit; a first suction inlet that communicates with one of the suction oil path and the strainer and a second suction inlet that communicates with the other of the suction oil path and the strainer, and a balanced vane pump.Type: ApplicationFiled: January 6, 2016Publication date: December 14, 2017Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsuhiro TAKEDA, Yoshihiro MIZUNO, Tetsuya KOHNO, Yoshinobu SOGA, Syuji MORIYAMA, Hiromitsu NITANI, Takafumi INAGAKI
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Publication number: 20170350500Abstract: Ground wires are shared between a drive-side pulley solenoid valve and a driven-side pulley solenoid valve. Therefore, when a disconnection or short circuit occurs in the shared portion, a drive-side pulley and a driven-side pulley show substantially the same behavior. As a result, changes in the speed ratio ?cvt of a continuously variable transmission are suppressed and changes in vehicle behavior are also suppressed. Therefore, it is possible to suppress the degradation of drivability during the failure of the solenoid valves involved in power transmission.Type: ApplicationFiled: September 7, 2015Publication date: December 7, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takafumi INAGAKI, Yoshinobu SOGA, Shuji MORIYAMA, Yoshihiro MIZUNO, Hiromitsu NITANI