Patents by Inventor Hideharu Nohara
Hideharu Nohara 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: 10012309Abstract: An electronic control unit is configured to, when the electronic control unit determines that any one of a first condition and a second condition is satisfied, preferentially execute lower limit speed ratio control. The first condition is a condition that, after the electronic control unit starts shift prohibition control, a wheel lock has occurred before a condition for cancelling the shift prohibition control is satisfied. The second condition is a condition that, after the electronic control unit starts the lower limit speed ratio control, a wheel spin has occurred before a condition for cancelling the lower limit speed ratio control is satisfied.Type: GrantFiled: August 25, 2016Date of Patent: July 3, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenta Kumazaki, Kazuyuki Shiiba, Tooru Matsubara, Hideharu Nohara, Masayuki Baba
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Publication number: 20170067557Abstract: An electronic control unit is configured to, when the electronic control unit determines that any one of a first condition and a second condition is satisfied, preferentially execute lower limit speed ratio control. The first condition is a condition that, after the electronic control unit starts shift prohibition control, a wheel lock has occurred before a condition for cancelling the shift prohibition control is satisfied. The second condition is a condition that, after the electronic control unit starts the lower limit speed ratio control, a wheel spin has occurred before a condition for cancelling the lower limit speed ratio control is satisfied.Type: ApplicationFiled: August 25, 2016Publication date: March 9, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenta KUMAZAKI, Kazuyuki SHIIBA, Tooru MATSUBARA, Hideharu NOHARA, Masayuki BABA
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Patent number: 9482338Abstract: When a user performs an operation to switch from a forward range to a reverse range, an ECU switches an oil passage (referred to hereafter as a “B2 pressure supply source oil passage”), through which oil pressure is supplied to a brake, from a first oil passage to a second oil passage while engaging the same brake. At this time, in consideration of a response delay in the oil pressure in the second oil passage, the ECU switches the B2 pressure supply source oil passage from the first oil passage to the second oil passage after a predetermined time ? elapses from the point at which the user performs the forward-reverse switch operation (in other words, after waiting for the oil pressure in the second oil passage to reach a threshold pressure) rather than at the point at which the user performs the forward-reverse switch operation.Type: GrantFiled: April 9, 2015Date of Patent: November 1, 2016Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Hideharu Nohara, Toshio Sugimura, Tooru Matsubara, Koichi Okuda, Kota Fujii, Kazuyuki Noda, Kousuke Tanaka
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Publication number: 20150308568Abstract: When a user performs an operation to switch from a forward range to a reverse range, an ECU switches an oil passage (referred to hereafter as a “B2 pressure supply source oil passage”), through which oil pressure is supplied to a brake, from a first oil passage to a second oil passage while engaging the same brake. At this time, in consideration of a response delay in the oil pressure in the second oil passage, the ECU switches the B2 pressure supply source oil passage from the first oil passage to the second oil passage after a predetermined time ? elapses from the point at which the user performs the forward-reverse switch operation (in other words, after waiting for the oil pressure in the second oil passage to reach a threshold pressure) rather than at the point at which the user performs the forward-reverse switch operation.Type: ApplicationFiled: April 9, 2015Publication date: October 29, 2015Inventors: Hideharu NOHARA, Toshio SUGIMURA, Tooru MATSUBARA, Koichi OKUDA, Kota FUJII, Kazuyuki NODA, Kousuke TANAKA
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Patent number: 8930101Abstract: A control apparatus for a hybrid vehicle provided with an electrically operated continuously-variable transmitting portion and a step-variable transmitting portion, which control apparatus permits an adequate control of a shifting action of the step-variable transmitting portion, while reducing deterioration of fuel economy of the hybrid vehicle.Type: GrantFiled: September 27, 2010Date of Patent: January 6, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hideaki Otsubo, Naoki Ishikawa, Hideharu Nohara
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Patent number: 8909407Abstract: A control device of a hybrid vehicle has an electric shift mechanism including a differential mechanism having a first rotating element coupled to an engine in a power transmittable manner, a second rotating element coupled to a differential electric motor in a power transmittable manner, and a third rotating element that is an output rotating member coupled to an electric motor for running in a power transmittable manner, and a mechanical shift mechanism, and makes a differential torque smaller between an output torque of the engine and an engagement torque of the engagement devices involved in a shift of the mechanical shift mechanism on the same shaft in a case of a shift with a smaller rotation speed change in the engine as compared to a case of a shift with a larger rotation speed change in the engine in the same type of shift in the mechanical shift mechanism.Type: GrantFiled: May 16, 2011Date of Patent: December 9, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hideaki Otsubo, Naoki Ishikawa, Hideharu Nohara
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Publication number: 20140148987Abstract: A control device of a hybrid vehicle has an electric shift mechanism including a differential mechanism having a first rotating element coupled to an engine in a power transmittable manner, a second rotating element coupled to a differential electric motor in a power transmittable manner, and a third rotating element that is an output rotating member coupled to an electric motor for running in a power transmittable manner, and a mechanical shift mechanism, and makes a differential torque smaller between an output torque of the engine and an engagement torque of the engagement devices involved in a shift of the mechanical shift mechanism on the same shaft in a case of a shift with a smaller rotation speed change in the engine as compared to a case of a shift with a larger rotation speed change in the engine in the same type of shift in the mechanical shift mechanism.Type: ApplicationFiled: May 16, 2011Publication date: May 29, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideaki Otsubo, Naoki Ishikawa, Hideharu Nohara
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Publication number: 20130218387Abstract: A control apparatus for a hybrid vehicle provided with an electrically operated continuously-variable transmitting portion and a step-variable transmitting portion, which control apparatus permits an adequate control of a shifting action of the step-variable transmitting portion, while reducing deterioration of fuel economy of the hybrid vehicle.Type: ApplicationFiled: September 27, 2010Publication date: August 22, 2013Applicant: Toyota Jidosha Kabushiki KaishaInventors: Hideaki Otsubo, Naoki Ishikawa, Hideharu Nohara, Takahiko Tsutsumi
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Publication number: 20130184920Abstract: A control apparatus for a hybrid vehicle provided with an electrically operated continuously-variable transmitting portion and a step-variable transmitting portion, which control apparatus permits an adequate control of a shifting action of the step-variable transmitting portion, while reducing deterioration of fuel economy of the hybrid vehicle.Type: ApplicationFiled: September 27, 2010Publication date: July 18, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideaki Otsubo, Naoki Ishikawa, Hideharu Nohara
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Patent number: 8296026Abstract: In a control apparatus for a powertrain that includes an automatic transmission, occurrence of slip in a one-way clutch is determined when one gear is formed if a first rotation member and a second rotation member of the one-way clutch rotate relatively. If slip in the one-way clutch is detected, it is determined whether the rotational speed difference between the first rotation member and the second rotation member has increased. If the rotational speed difference between the first rotation member and the second rotation member has increased when slip is detected in the one-way clutch, a control is executed to engage a predetermined frictional engagement element.Type: GrantFiled: December 3, 2007Date of Patent: October 23, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yasuhiro Maeda, Hideharu Nohara, Toshinari Suzuki
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Patent number: 7686738Abstract: Hydraulic pressure supplied to a first brake and a second brake in a transmission is controlled during an upshift such that the second brake releases from an applied state, and the first brake applies from a released state. The hydraulic pressure supplied to the first brake is increased to a standby pressure. When a period of time has passed after the upshift starts, the output torque of a powertrain is increased. The standby pressure is corrected according to a decrease rate of an input shaft rotation speed of the transmission during an inertia phase of the upshift. An ECU executes a program that includes the step of setting the period of time from the start of the upshift until the output torque of the powertrain starts to increase, according to the standby pressure.Type: GrantFiled: January 7, 2008Date of Patent: March 30, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hideharu Nohara, Koki Minamikawa
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Patent number: 7678014Abstract: A control apparatus for a vehicular power transmitting system including an electrically controlled differential portion having an electric motor, and an automatic transmission portion, the control apparatus including shift control portion operable upon determination that a jump shift-down action of the automatic transmission portion directly to a target gear position while skipping at least one intermediate gear position should take place and upon inhibition of the jump shift-down action, to generate a shifting command to perform the jump shift-down action when total jump-shift-down-action time required for the jump shift-down action is shorter than total sequential-shift-down-operation time required for a sequential shift-down operation consisting of a shift-down action to each intermediate gear position and a shift-down action from the last intermediate gear position to the target gear position, and a shifting command to perform the sequential shift-down operation when the total jump-shift-down-action timeType: GrantFiled: January 28, 2009Date of Patent: March 16, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hideharu Nohara, Toshinari Suzuki
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Publication number: 20090203481Abstract: A control apparatus for a vehicular power transmitting system including an electrically controlled differential portion having an electric motor, and an automatic transmission portion, the control apparatus including shift control portion operable upon determination that a jump shift-down action of the automatic transmission portion directly to a target gear position while skipping at least one intermediate gear position should take place and upon inhibition of the jump shift-down action, to generate a shifting command to perform the jump shift-down action when total jump-shift-down-action time required for the jump shift-down action is shorter than total sequential-shift-down-operation time required for a sequential shift-down operation consisting of a shift-down action to each intermediate gear position and a shift-down action from the last intermediate gear position to the target gear position, and a shifting command to perform the sequential shift-down operation when the total jump-shift-down-action timeType: ApplicationFiled: January 28, 2009Publication date: August 13, 2009Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideharu Nohara, Toshinari Suzuki
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Publication number: 20080288145Abstract: In a control apparatus for a powertrain that includes an automatic transmission, occurrence of slip in a one-way clutch is determined when one gear is formed if a first rotation member and a second rotation member of the one-way clutch rotate relatively. If slip in the one-way clutch is detected, it is determined whether the rotational speed difference between the first rotation member and the second rotation member has increased. If the rotational speed difference between the first rotation member and the second rotation member has increased when slip is detected in the one-way clutch, a control is executed to engage a predetermined frictional engagement element.Type: ApplicationFiled: December 3, 2007Publication date: November 20, 2008Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasuhiro Maeda, Hideharu Nohara, Toshinari Suzuki
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Publication number: 20080176710Abstract: Hydraulic pressure supplied to a first brake and a second brake in a transmission is controlled during an upshift such that the second brake releases from an applied state, and the first brake applies from a released state. The hydraulic pressure supplied to the first brake is increased to a standby pressure. When a period of time has passed after the upshift starts, the output torque of a powertrain is increased. The standby pressure is corrected according to a decrease rate of an input shaft rotation speed of the transmission during an inertia phase of the upshift. An ECU executes a program that includes the step of setting the period of time from the start of the upshift until the output torque of the powertrain starts to increase, according to the standby pressure.Type: ApplicationFiled: January 7, 2008Publication date: July 24, 2008Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideharu Nohara, Koki Minamikawa