Patents by Inventor Keiichirou KUSABE
Keiichirou KUSABE 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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Publication number: 20240083238Abstract: A control device that controls an internal combustion engine, a first rotary electric machine, a first engagement device, and a second engagement device performing first transition control when transition is performed from a first mode to a second mode. The first transition control includes first control, second control, and third control. The first control is control in which the second engagement device that connects and disconnects power transmission between two rotary elements selected from among three rotary elements of a distribution differential gear mechanism is changed from an engaged state to a disengaged state while a third engagement device of a transmission mechanism is maintained in an engaged state. The second control controls a rotational speed of the first rotary element to is changed from a disengaged state to an engaged state and the internal combustion engine is started by using drive power transmitted from the first rotary electric.Type: ApplicationFiled: March 9, 2022Publication date: March 14, 2024Applicant: AISIN CORPORATIONInventors: Keiichirou KUSABE, Kohei TSUDA, Bumpei NAKAYA
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Publication number: 20230391316Abstract: A distribution differential gear mechanism includes a first rotation element drivingly connected to input member, a second rotation element drivingly connected to output member, and a third rotation element drivingly connected to rotary electric machine.Type: ApplicationFiled: January 20, 2022Publication date: December 7, 2023Applicant: AISIN CORPORATIONInventors: Keiichirou KUSABE, Kohei TSUDA, Bumpei NAKAYA
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Patent number: 11807104Abstract: A vehicle drive device includes a first drive unit that drives first wheels; a second drive unit that drives second wheels; and a control device. When the state of charge of an electrical storage device is less than a first threshold value and a vehicle speed is less than a second threshold value, the control device performs control such that when the vehicle speed is greater than or equal to zero and required drive power is greater than or equal to zero, the operating mode of the first drive unit is set to a second mode to output the required drive power from the second drive unit, and when the vehicle speed is greater than zero and the required drive power is less than zero, the operating mode of the first drive unit is set to a first mode so the first drive power source can generate electric power.Type: GrantFiled: May 28, 2021Date of Patent: November 7, 2023Assignee: AISIN CORPORATIONInventors: Kohei Tsuda, Keiichirou Kusabe, Bumpei Nakaya, Yasuhiro Matsumura
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Publication number: 20230112389Abstract: A vehicle drive device includes a first drive unit that drives first wheels; a second drive unit that drives second wheels; and a control device. When the state of charge of an electrical storage device is less than a first threshold value and a vehicle speed is less than a second threshold value, the control device performs control such that when the vehicle speed is greater than or equal to zero and required drive power is greater than or equal to zero, the operating mode of the first drive unit is set to a second mode to output the required drive power from the second drive unit, and when the vehicle speed is greater than zero and the required drive power is less than zero, the operating mode of the first drive unit is set to a first mode so the first drive power source can generate electric power.Type: ApplicationFiled: May 28, 2021Publication date: April 13, 2023Applicant: AISIN CORPORATIONInventors: Kohei TSUDA, Keiichirou KUSABE, Bumpei NAKAYA, Yasuhiro MATSUMURA
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Publication number: 20230114911Abstract: When it is determined that predicted required drive power (Tf) which is drive power predicted to be required for a vehicle is greater than a first threshold value (TH1) set within a range of drive power that can be outputted in a second mode, or when actual required drive power (Ta) is greater than the first threshold value (TH1), a control device (10) sets an operating mode to a first mode in which a first engagement device (CL1) is brought into an engaged state and a second engagement device (CL2) is brought into a disengaged state, to control a rotating electrical machine (MG1) and an internal combustion engine (EG) to output the actual required drive power (Ta). In other cases, the control device (10) sets the operating mode to the second mode in which the first engagement device (CLl) is brought into a disengaged state and the second engagement device (CL2) is brought into an engaged state, to control the rotating electrical machine (MGl) to output the actual required drive power (Ta).Type: ApplicationFiled: June 9, 2021Publication date: April 13, 2023Applicant: AISIN CORPORATIONInventors: Kohei TSUDA, Keiichirou KUSABE, Bumpei NAKAYA, Yasuhiro MATSUMURA
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Patent number: 10507837Abstract: A control device that controls a vehicle drive transfer device in which a speed change device that includes a plurality of engagement devices and that selectively establishes one of a plurality of shift speeds with different speed ratios in accordance with a state of engagement of the plurality of engagement devices is provided in a power transfer path that connects between a drive force source and wheels.Type: GrantFiled: December 25, 2015Date of Patent: December 17, 2019Assignee: AISIN AW CO., LTD.Inventors: Shoichi Ishida, Kohei Tsuda, Keiichirou Kusabe
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Patent number: 10300908Abstract: A control device that includes an electronic control unit that causes a rotational speed of the rotating electric machine to change according to a predetermined first change pattern after the rotational speed of the rotating electric machine changes from a pre-shifting synchronous rotational speed in association with progress of the shifting operation until reaching a first synchronous range that is determined on the basis of a rotational speed of the internal combustion engine, the pre-shifting synchronous rotational speed being the rotational speed of the rotating electric machine in a shift speed established before the shifting operation is started.Type: GrantFiled: March 29, 2016Date of Patent: May 28, 2019Assignee: AISIN AW CO., LTD.Inventors: Shoichi Ishida, Kohei Tsuda, Keiichirou Kusabe
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Patent number: 10279687Abstract: A control device that includes an electronic control unit that is programmed such that, when the internal combustion engine is started by the rotary electric machine while output torque from the rotary electric machine is transferred to the wheels in a state in which rotation of the internal combustion engine has been stopped, the electronic control unit: executes second slipping control in which the second engagement device is controlled into a slipping engagement state, executes first slipping control in which the first engagement device which has been in a disengaged state is controlled into a slipping engagement state during execution of the second slipping control, and controls an engagement pressure of the first engagement device so as to lower a rotational speed of the rotary electric machine in the first slipping control.Type: GrantFiled: September 30, 2015Date of Patent: May 7, 2019Assignee: AISIN AW CO., LTD.Inventors: Hirokazu Kobayashi, Keiichirou Kusabe
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Publication number: 20190039602Abstract: A control device for controlling a vehicle drive device, as a control target, including a transfer clutch device, a rotary electric machine, and a transmission device that includes a plurality of shift clutch devices of which states of engagement are controlled in a shifting operation, on a power transfer path connecting an internal combustion engine to a wheel, the control device including an electronic control unit.Type: ApplicationFiled: September 30, 2016Publication date: February 7, 2019Applicant: AISIN AW CO., LTD.Inventors: Keiichirou KUSABE, Kohei TSUDA, Tomohiro ONOUCHI
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Publication number: 20180208202Abstract: To avoid occurrence of difference in level of torque in a case where direction of relative rotation between internal combustion engine and rotary electric machine is reversed, in starting internal combustion engine with shift clutch device brought into direct engagement state. Control device controls vehicle drive device including transfer clutch device, rotary electric machine, and transmission device each disposed on power transfer path connecting internal combustion engine to wheels.Type: ApplicationFiled: September 8, 2016Publication date: July 26, 2018Applicant: AISIN AW CO., LTD.Inventors: Hirokazu KOBAYASHI, Kohei TSUDA, Keiichirou KUSABE, Takashi YOSHIDA
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Publication number: 20180043880Abstract: A control device that includes an electronic control unit that causes a rotational speed of the rotating electric machine to change according to a predetermined first change pattern after the rotational speed of the rotating electric machine changes from a pre-shifting synchronous rotational speed in association with progress of the shifting operation until reaching a first synchronous range that is determined on the basis of a rotational speed of the internal combustion engine, the pre-shifting synchronous rotational speed being the rotational speed of the rotating electric machine in a shift speed established before the shifting operation is started.Type: ApplicationFiled: March 29, 2016Publication date: February 15, 2018Applicant: AISIN AW CO., LTD.Inventors: Shoichi ISHIDA, Kohei TSUDA, Keiichirou KUSABE
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Patent number: 9845870Abstract: A lock-up clutch control device that sets a hydraulic pressure command value for a lock-up clutch as a starting device together with a pump impeller coupled to a motor of a vehicle and a turbine runner coupled to an input shaft of a transmission such that an actual rotational speed difference between the motor and the input shaft coincides with a target slip speed that matches a state of the vehicle, and that controls the lock-up clutch based on the hydraulic pressure command value.Type: GrantFiled: January 17, 2014Date of Patent: December 19, 2017Assignee: AISIN AW CO., LTD.Inventors: Keiichirou Kusabe, Yasuhiko Kobayashi, Jin Izawa
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Publication number: 20170327122Abstract: A control device that controls a vehicle drive transfer device in which a speed change device that includes a plurality of engagement devices and that selectively establishes one of a plurality of shift speeds with different speed ratios in accordance with a state of engagement of the plurality of engagement devices is provided in a power transfer path that connects between a drive force source and wheels.Type: ApplicationFiled: December 25, 2015Publication date: November 16, 2017Applicant: AISIN AW CO., LTD.Inventors: Shoichi ISHIDA, Kohei TSUDA, Keiichirou KUSABE
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Patent number: 9815455Abstract: A control device for a vehicle drive device having a speed change mechanism that attains a predetermined shift speed by engaging multiple engagement elements. The control device predicts an amount of heat generation and determines whether any jumping shift from the current shift speed to the shift speed that is the multiple shift speeds higher or lower than the current shift speed can be permitted or not between the current shift speed and the target shift speed, and if the jumping shift can be permitted, the control unit performs the jumping shift and controls the speed change mechanism so as to shift the shift speed from the current shift speed to the target shift speed.Type: GrantFiled: October 4, 2013Date of Patent: November 14, 2017Assignee: AISIN AW CO., LTD.Inventors: Kohei Tsuda, Tomohiro Onouchi, Keiichirou Kusabe
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Publication number: 20170305277Abstract: A control device that includes an electronic control unit that is programmed such that, when the internal combustion engine is started by the rotary electric machine while output torque from the rotary electric machine is transferred to the wheels in a state in which rotation of the internal combustion engine has been stopped, the electronic control unit: executes second slipping control in which the second engagement device is controlled into a slipping engagement state, executes first slipping control in which the first engagement device which has been in a disengaged state is controlled into a slipping engagement state during execution of the second slipping control, and controls an engagement pressure of the first engagement device so as to lower a rotational speed of the rotary electric machine in the first slipping control.Type: ApplicationFiled: September 30, 2015Publication date: October 26, 2017Applicant: AISIN AW CO., LTD.Inventors: Hirokazu KOBAYASHI, Keiichirou KUSABE
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Patent number: 9688267Abstract: A control device for controlling a vehicle driving device provided with a transmission apparatus including a plurality of engagement devices in a power transmission path between a driving force source and a wheel and selectively forming a plurality of transmission shift stages having different transmission shift ratios depending on engagement states of the plurality of engagement devices.Type: GrantFiled: March 20, 2015Date of Patent: June 27, 2017Assignee: AISIN AW CO., LTD.Inventors: Kohei Tsuda, Keiichirou Kusabe, Tomohiro Onouchi, Shoichi Ishida
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Publication number: 20170072934Abstract: A control device for controlling a vehicle driving device provided with a transmission apparatus including a plurality of engagement devices in a power transmission path between a driving force source and a wheel and selectively forming a plurality of transmission shift stages having different transmission shift ratios depending on engagement states of the plurality of engagement devices.Type: ApplicationFiled: March 20, 2015Publication date: March 16, 2017Applicant: AISIN AW CO., LTD.Inventors: Kohei TSUDA, Keiichirou KUSABE, Tomohiro ONOUCHI, Shoichi ISHIDA
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Patent number: 9506559Abstract: A speed change ECU, in a case in which any one of a second speed to a fourth speed is established when the operation of the engine is stopped by an idle stop control, determines whether a rotation number of the engine is less than a synchronous rotation number of an input shaft that is defined based on a gear ratio (speed change ratio) ?1 at a first speed and a vehicle speed, in a case in which it is determined that the rotation number is equal to or greater than the synchronous rotation number, does not disengage any one of a brake, a clutch, and a clutch serving as a second engagement element, and in a case in which the rotation number is less than the synchronous rotation number, disengages any one of the brake, the clutch, and the clutch serving as the second engagement element.Type: GrantFiled: December 25, 2013Date of Patent: November 29, 2016Assignee: AISIN AW CO., LTD.Inventors: Kohei Tsuda, Keiichirou Kusabe
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Publication number: 20150330505Abstract: A lock-up clutch control device that sets a hydraulic pressure command value for a lock-up clutch as a starting device together with a pump impeller coupled to a motor of a vehicle and a turbine runner coupled to an input shaft of a transmission such that an actual rotational speed difference between the motor and the input shaft coincides with a target slip speed that matches a state of the vehicle, and that controls the lock-up clutch based on the hydraulic pressure command value.Type: ApplicationFiled: January 17, 2014Publication date: November 19, 2015Inventors: Keiichirou KUSABE, Yasuhiko KOBAYASHI, Jin IZAWA
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Publication number: 20150274154Abstract: A control device for a vehicle drive device having a speed change mechanism that attains a predetermined shift speed by engaging multiple engagement elements. The control device predicts an amount of heat generation and determines whether any jumping shift from the current shift speed to the shift speed that is the multiple shift speeds higher or lower than the current shift speed can be permuted or not between the current shift speed and the target shift speed, and if the jumping shift can be permitted, the control unit performs the jumping shift and controls the speed change mechanism so as to shift the shift speed from the current shift speed to the target shift speed.Type: ApplicationFiled: October 4, 2013Publication date: October 1, 2015Applicant: AISIN AW CO., LTD.Inventors: Kohei Tsuda, Tomohiro Onouchi, Keiichirou Kusabe