Patents by Inventor Shuji Toyokawa
Shuji Toyokawa 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: 10137879Abstract: A control apparatus includes an ECU that is configured to: start engagement transition control for outputting an engagement transitional hydraulic pressure command value that causes an engagement device to be actuated from a released state toward an engaged state from when an operating member is displaced from a non-drive operating position; when an engagement transition time is longer than a target time, learn the engagement transitional hydraulic pressure command value such that the engagement transitional hydraulic pressure command value increases; when the engagement transition time is shorter than the target time, learn the engagement transitional hydraulic pressure command value such that the engagement transitional hydraulic pressure command value reduces; and prohibit learning of the engagement transitional hydraulic pressure command value or invalidate the learned engagement transitional hydraulic pressure command value, when the operating time of the operating member is longer than a predetermined tType: GrantFiled: January 13, 2017Date of Patent: November 27, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shuji Toyokawa, Masayasu Mizobuchi
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Patent number: 10131358Abstract: A vehicle control apparatus which includes an engine, an automatic transmission, and drive wheels transmitted with the power of the engine through the automatic transmission, the automatic transmission including a torque converter connected with the engine, a transmission mechanism connected with the torque converter, the torque converter having a pump impeller connected with the engine, and a turbine runner connected with the transmission mechanism, the vehicle control apparatus for a vehicle further including: an input shaft rotational speed sensor that detects the rotational speed Nt of the turbine runner, and a control unit to control the engine to have the rotational speed Ne of the engine raised when a determination condition in which the rotational speed Nt of the turbine runner is not raised even within a standard time T1 lapsed after the engine is started is established.Type: GrantFiled: November 29, 2013Date of Patent: November 20, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yu Sasaki, Takeshi Ishiwada, Shuji Toyokawa
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Patent number: 10082205Abstract: There is provided an abnormality determining apparatus for a hydraulic circuit of a vehicle including: a torque converter; a hydraulic clutch; a mechanically-driven hydraulic pump (14); an electrically-driven hydraulic pump (16); and a solenoid valve. The abnormality determining apparatus includes an electronic control unit configured to determine which of the electrically-driven hydraulic pump and the solenoid valve has an abnormality, and configured to determine that the electrically-driven hydraulic pump has an abnormality when a turbine speed of the torque converter becomes equal to or higher than a first determination value within a prescribed period of time from rise-up of an engine speed, and determine that the solenoid valve has an abnormality when the turbine speed becomes equal to or higher than a second determination value higher than the first determination value, after a lapse of the prescribed period of time.Type: GrantFiled: May 8, 2015Date of Patent: September 25, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi Miura, Tomohiro Chinbe, Shuji Toyokawa, Tomohiro Asami
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Publication number: 20170203746Abstract: A control apparatus includes an ECU that is configured to: start engagement transition control for outputting an engagement transitional hydraulic pressure command value that causes an engagement device to be actuated from a released state toward an engaged state from when an operating member is displaced from a non-drive operating position; when an engagement transition time is longer than a target time, learn the engagement transitional hydraulic pressure command value such that the engagement transitional hydraulic pressure command value increases; when the engagement transition time is shorter than the target time, learn the engagement transitional hydraulic pressure command value such that the engagement transitional hydraulic pressure command value reduces; and prohibit learning of the engagement transitional hydraulic pressure command value or invalidate the learned engagement transitional hydraulic pressure command value, when the operating time of the operating member is longer than a predetermined tType: ApplicationFiled: January 13, 2017Publication date: July 20, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shuji TOYOKAWA, Masayasu MIZOBUCHI
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Patent number: 9587738Abstract: In the event of a failure to detect an operation position Psh, a shift command to a forward gear position (in this embodiment, the second-speed gear position “2nd” and the eight-speed gear position “8th”) established in association with an engagement device (in this embodiment, a brake B1) that causes locking of drive wheels when engaged with a one-way clutch F1, out of given forward gear positions formed when the operation position is a forward traveling operation position D, is not generated.Type: GrantFiled: November 18, 2015Date of Patent: March 7, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Shuji Toyokawa
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Publication number: 20170059038Abstract: There is provided an abnormality determining apparatus for a hydraulic circuit of a vehicle including: a torque converter; a hydraulic clutch; a mechanically-driven hydraulic pump (14); an electrically-driven hydraulic pump (16); and a solenoid valve. The abnormality determining apparatus includes an electronic control unit configured to determine which of the electrically-driven hydraulic pump and the solenoid valve has an abnormality, and configured to determine that the electrically-driven hydraulic pump has an abnormality when a turbine speed of the torque converter becomes equal to or higher than a first determination value within a prescribed period of time from rise-up of an engine speed, and determine that the solenoid valve has an abnormality when the turbine speed becomes equal to or higher than a second determination value higher than the first determination value, after a lapse of the prescribed period of time.Type: ApplicationFiled: May 8, 2015Publication date: March 2, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi MIURA, Tomohiro CHINBE, Shuji TOYOKAWA, Tomohiro ASAMI
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Publication number: 20170050640Abstract: In a vehicle automatic transmission having structure in which an output-side rotating element is provided between a speed increasing-side rotating element that is connected to an engine via input clutch and increased rotation speed during downshift into a predetermined speed, and a speed reducing-side rotating element that is reduced in rotation speed by a second engagement apparatus being engaged during the downshift, in an alignment graph, the first engagement apparatus is engaged when, or after, the second engagement apparatus is engaged at the time of the downshift into the predetermined speed. As a result, the rotation speed of the speed reducing-side rotating element is reduced first by the engagement of the second engagement apparatus, which causes driving force to act on the output-side rotating element in a direction that reduces the rotating speed thereof. As a result, forward driving force is prevented from being generated by the output-side rotating element.Type: ApplicationFiled: May 8, 2015Publication date: February 23, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Shuji TOYOKAWA
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Publication number: 20160146340Abstract: In the event of a failure to detect an operation position Psh, a shift command to a forward gear position (in this embodiment, the second-speed gear position “2nd” and the eight-speed gear position “8th”) established in association with an engagement device (in this embodiment, a brake B1) that causes locking of drive wheels when engaged with a one-way clutch F1, out of given forward gear positions formed when the operation position is a forward traveling operation position D, is not generated.Type: ApplicationFiled: November 18, 2015Publication date: May 26, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Shuji TOYOKAWA
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Publication number: 20150232101Abstract: A vehicle control apparatus which includes an engine, an automatic transmission, and drive wheels transmitted with the power of the engine through the automatic transmission, the automatic transmission including a torque converter connected with the engine, a transmission mechanism connected with the torque converter, the torque converter having a pump impeller connected with the engine, and a turbine runner connected with the transmission mechanism, the vehicle control apparatus for a vehicle further including: an input shaft rotational speed sensor that detects the rotational speed Nt of the turbine runner, and a control unit to control the engine to have the rotational speed Ne of the engine raised when a determination condition in which the rotational speed Nt of the turbine runner is not raised even within a standard time T1 lapsed after the engine is started is established.Type: ApplicationFiled: November 29, 2013Publication date: August 20, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yu Sasaki, Takeshi Ishiwada, Shuji Toyokawa