Patents by Inventor Hiroto Hashimoto
Hiroto Hashimoto 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: 10137767Abstract: A power transmission unit that can prevent an entrance of excessive torque to the powertrain is provided. The power transmission unit includes a transmission that transmits torque between an engine and drive wheels; a locking device that selectively halts a rotation of an output shaft of the engine; a transmission case holding a first motor, a second motor, the transmission, and the locking device; a first torque limiter disposed between the engine and the locking device to restrict torque transmitted between the drive wheels and the engine; and a second torque limiter held in the transmission case to restrict torque transmitted between the drive wheels and the locking device.Type: GrantFiled: August 9, 2016Date of Patent: November 27, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroto Hashimoto, Tomohito Ono, Hiroaki Kimura
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Publication number: 20180334025Abstract: A drive unit for a hybrid vehicle that enables downsizing and cost reduction of an oil supply mechanism to be achieved. The drive unit includes: a first feeding line for supplying a first motor and a differential mechanism with oil discharged from a first oil pump; and a second feeding line for supplying a second motor with oil discharged from a second oil pump, the oil being supplied via an oil cooler that cools the oil. A passage between from the second oil pump to the second motor in the second feeding line and a passage between from the first oil pump to the first motor and the differential mechanism in the first feeding line, are independent of each other.Type: ApplicationFiled: May 17, 2018Publication date: November 22, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroto HASHIMOTO, Hiroaki KIMURA, Tomohito ONO
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Patent number: 10030724Abstract: An engagement device includes: a first member including a plurality of engaged teeth; a second member arranged coaxially with the first member, the second member including a plurality of engaging teeth; a rotation unit configured to relatively rotate the first member and the second member about an axis; a movement unit configured to relatively move the first member and the second member in an axial direction; and a control unit configured to control operations of the rotation unit and the movement unit, and the engaged teeth are formed on the first member at a side opposing the second member along a circumferential direction around the axis, and the engaging teeth are formed on the second member at a side opposing the first member along the circumferential direction around the axis.Type: GrantFiled: January 22, 2013Date of Patent: July 24, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroaki Ebuchi, Yuji Iwase, Hidekazu Nagai, Hiroto Hashimoto
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Patent number: 9963148Abstract: A control device for a vehicle is provided. The control device includes an electronic control unit that is configured to: exert the torque of an input member on a fixed member and a rotating member such that the fixed member and the rotating member are separated from each other, when the thrust is exerted for making the engagement teeth mesh with each other; estimate an inclination angle of tooth surfaces based on a relative movement amount between the fixed member and the rotating member, and a relative rotational amount between the fixed member and the rotating member; estimate a frictional coefficient of the tooth surfaces based on the inclination angle; and control the thrust of the actuator according to the frictional coefficient.Type: GrantFiled: March 13, 2017Date of Patent: May 8, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroto Hashimoto, Akira Murakami, Hiroaki Kimura, Tomohito Ono
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Publication number: 20180029590Abstract: A control system for a hybrid vehicle configured to promptly disengage a clutch for halting an engine is provided. A clutch device comprises a reciprocating member having tapered reciprocating teeth, and a rotary member having tapered teeth opposed to the tapered rotary teeth. A controller is configured to turn off an actuator to eliminate the electromagnetic attraction thereby allowing the engine to be started, and to apply a torque of the first motor to the clutch device after the actuator is turned off thereby disengaging the reciprocating teeth from the rotary teeth.Type: ApplicationFiled: July 27, 2017Publication date: February 1, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroto HASHIMOTO, Hiroaki KIMURA, Tomohito ONO, Takuya IGUCHI
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Patent number: 9816570Abstract: An electromagnetic actuator includes an electromagnetic coil, fixed portions placed around the electromagnetic coil, and a movable portion including a magnetic circuit of the electromagnetic coil together with the fixed portions. The movable portion is configured to operate an operated member by moving in a predetermined direction due to an electromagnetic force generated in the magnetic circuit. The movable portion includes a first member and a second member. The first member and the second member are supported respectively by the fixed portions. The first member and the second member are incorporated to each other by sandwiching the operated member from both sides in the predetermined direction.Type: GrantFiled: May 27, 2014Date of Patent: November 14, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroaki Ebuchi, Yuji Iwase, Shotaro Kato, Hidekazu Nagai, Hiroto Hashimoto
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Publication number: 20170291504Abstract: A control system for a vehicle having two motors is provided to limit damage on rotary members even if an excessive torque is applied from drive wheels. The control system comprises a first motor, a second motor, and a locking mechanism, and a differential mechanism disposed between the first motor and the drive wheels. The locking mechanism halts one of rotary elements of a differential mechanism when torque of the rotary member is small, and allows the rotary element to rotate when the torque of the rotary member is large. A controller is configured to increase power output of the first motor and decrease power output of the second motor during propulsion on an uneven road surface.Type: ApplicationFiled: April 6, 2017Publication date: October 12, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroaki KIMURA, Tomohito ONO, Hiroto HASHIMOTO
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Publication number: 20170267246Abstract: A control device for a vehicle is provided. The control device includes an electronic control unit that is configured to: exert the torque of an input member on a fixed member and a rotating member such that the fixed member and the rotating member are separated from each other, when the thrust is exerted for making the engagement teeth mesh with each other; estimate an inclination angle of tooth surfaces based on a relative movement amount between the fixed member and the rotating member, and a relative rotational amount between the fixed member and the rotating member; estimate a frictional coefficient of the tooth surfaces based on the inclination angle; and control the thrust of the actuator according to the frictional coefficient.Type: ApplicationFiled: March 13, 2017Publication date: September 21, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroto HASHIMOTO, Akira MURAKAMI, Hiroaki KIMURA, Tomohito ONO
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Patent number: 9695889Abstract: An intermesh engagement device includes an intermesh engagement mechanism, a moving member, an actuator configured to apply a thrust to a moving member in an engaging direction, a transmission spring configured to transmit the thrust of the actuator from the moving member to a sleeve, a return spring, a stopper, and an electronic control unit configured to control the actuator. The electronic control unit is configured to execute first control for setting the thrust of the actuator to a thrust in a first region, and, when a halfway stopped state has occurred through the first control, execute second control for setting a thrust larger than the thrust in the first control. The first region is a range in which the thrust is larger than an urging force of the return spring and is smaller than the sum of the urging force of the return spring and a maximum urging force of the transmission spring.Type: GrantFiled: June 4, 2015Date of Patent: July 4, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroaki Ebuchi, Makoto Funahashi, Yuji Iwase, Shotaro Kato, Hidekazu Nagai, Hiroto Hashimoto
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Publication number: 20170097086Abstract: A cooling system for a power transmission unit that can cool a cooling site effectively is provided. The cooling system comprises: an oil pump; an oil cooler that cools the oil delivered from the oil pump; a first oil pipe for delivering the oil from the oil pump to the oil cooler; a second oil pipe for delivering the oil cooled by the oil cooler to a heat generating element. A housing chamber includes a high-temperature section where the heat generating element is arranged, and a low-temperature section. The second oil pipe is arranged in the housing chamber while passing through the low-temperature section, and an opening is formed on the second oil pipe in such a manner as to open toward the heat generating element.Type: ApplicationFiled: September 22, 2016Publication date: April 6, 2017Applicant: Toyota Jidosha Kabushiki KaishaInventors: Tomohito ONO, Hiroto HASHIMOTO, Hiroaki KIMURA
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Publication number: 20170043656Abstract: A power transmission unit that can prevent an entrance of excessive torque to the powertrain is provided. The power transmission unit includes a transmission that transmits torque between an engine and drive wheels; a locking device that selectively halts a rotation of an output shaft of the engine; a transmission case holding a first motor, a second motor, the transmission, and the locking device; a first torque limiter disposed between the engine and the locking device to restrict torque transmitted between the drive wheels and the engine; and a second torque limiter held in the transmission case to restrict torque transmitted between the drive wheels and the locking device.Type: ApplicationFiled: August 9, 2016Publication date: February 16, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: HIROTO HASHIMOTO, TOMOHITO ONO, HIROAKI KIMURA
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Patent number: 9566975Abstract: A drive control device includes: a meshing engagement unit; an engine; a rotary machine; a detector detecting a predetermined parameter; and a controller configured to perform a release control of causing the rotary machine to output a second rotation torque in a direction opposite to a first rotation torque applied from the engine to the engagement unit at a time the engagement unit is released. The release control includes setting a magnitude of the second rotation torque to a predetermined value larger than a magnitude of the first rotation torque at a time the predetermined parameter change degree is not smaller than a threshold value and gradually decreasing the magnitude of the second rotation torque, and setting the magnitude of the second rotation torque to a magnitude smaller than the predetermined value at a time the predetermined parameter change degree is smaller than the threshold value.Type: GrantFiled: May 19, 2015Date of Patent: February 14, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroto Hashimoto, Yuji Iwase, Hiroaki Ebuchi, Hidekazu Nagai, Shotaro Kato
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Publication number: 20170008533Abstract: an electronic control unit configured to i) while the engagement mechanism is changing from the engaged state to the released state, execute shaking control, ii) execute torque oscillation control, iii) determine whether to execute any one of releasing control and the torque oscillation control while the other one of the releasing control and the torque oscillation control is being executed, and iv) stop the shaking control when the electronic control unit determines to execute the releasing control and the torque oscillation control.Type: ApplicationFiled: July 8, 2016Publication date: January 12, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroaki EBUCHI, Akira MURAKAMI, Yuji IWASE, Shotaro KATO, Hidekazu NAGAI, Hiroto HASHIMOTO
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Patent number: 9517690Abstract: A vehicle driving control device for a vehicle includes a control unit configured to stop operation of an electric motor driving device driving an electric motor at a time a rotary element is fixed to be unable to rotate by an engagement by an engaging mechanism, and to recover the operation of the electric motor driving device at a time a predetermined condition based on a parameter relating to a driving of the vehicle is satisfied before releasing the engagement by the engaging mechanism.Type: GrantFiled: November 13, 2015Date of Patent: December 13, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroto Hashimoto, Yuji Iwase, Hiroaki Ebuchi, Hidekazu Nagai, Shotaro Kato
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Publication number: 20160144846Abstract: A vehicle driving control device for a vehicle includes a control unit configured to stop operation of an electric motor driving device driving an electric motor at a time a rotary element is fixed to be unable to rotate by an engagement by an engaging mechanism, and to recover the operation of the electric motor driving device at a time a predetermined condition based on a parameter relating to a driving of the vehicle is satisfied before releasing the engagement by the engaging mechanism.Type: ApplicationFiled: November 13, 2015Publication date: May 26, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroto HASHIMOTO, Yuji Iwase, Hiroaki Ebuchi, Hidekazu Nagai, Shotaro Kato
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Publication number: 20160131203Abstract: An electromagnetic actuator includes an electromagnetic coil, fixed portions placed around the electromagnetic coil, and a movable portion including a magnetic circuit of the electromagnetic coil together with the fixed portions. The movable portion is configured to operate an operated member by moving in a predetermined direction due to an electromagnetic force generated in the magnetic circuit. The movable portion includes a first member and a second member. The first member and the second member are supported respectively by the fixed portions. The first member and the second member are incorporated to each other by sandwiching the operated member from both sides in the predetermined direction.Type: ApplicationFiled: May 27, 2014Publication date: May 12, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroaki EBUCHI, Yuji IWASE, Shotaro KATO, Hidekazu NAGAI, Hiroto HASHIMOTO
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Publication number: 20160068155Abstract: A hybrid vehicle drive system includes: an engine; a rotary machine; a gear type engagement device; and a controller configured to: control a vehicle to travel in a first mode in which a reaction force of the engine is received by a torque of the rotary machine, and in a second mode in which the reaction force of the engine is received by the engagement device. The controller is configured to perform a first control of receiving the reaction force of the engine by the torque of the rotary machine, increasing a magnitude of the torque of the rotary machine to be equal to or greater than an upper limit of an estimated torque range of the engine, and then decreasing the magnitude of the torque of the rotary machine is performed at a time the engagement device is disengaged from the second mode.Type: ApplicationFiled: April 16, 2013Publication date: March 10, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroto HASHIMOTO, Yuji IWASE, Hiroaki EBUCHI, Hidekazu NAGAI, Shotaro KATO
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Publication number: 20150362027Abstract: An engagement device includes: a first member including a plurality of engaged teeth; a second member arranged coaxially with the first member, the second member including a plurality of engaging teeth; a rotation unit configured to relatively rotate the first member and the second member about an axis; a movement unit configured to relatively move the first member and the second member in an axial direction; and a control unit configured to control operations of the rotation unit and the movement unit, and the engaged teeth are formed on the first member at a side opposing the second member along a circumferential direction around the axis, and the engaging teeth are formed on the second member at a side opposing the first member along the circumferential direction around the axis.Type: ApplicationFiled: January 22, 2013Publication date: December 17, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroaki EBUCHI, Yuji IWASE, Hidekazu NAGAI, Hiroto HASHIMOTO
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Publication number: 20150354643Abstract: An intermesh engagement device includes an intermesh engagement mechanism, a moving member, an actuator configured to apply a thrust to a moving member in an engaging direction, a transmission spring configured to transmit the thrust of the actuator from the moving member to a sleeve, a return spring, a stopper, and an electronic control unit configured to control the actuator. The electronic control unit is configured to execute first control for setting the thrust of the actuator to a thrust in a first region, and, when a halfway stopped state has occurred through the first control, execute second control for setting a thrust larger than the thrust in the first control. The first region is a range in which the thrust is larger than an urging force of the return spring and is smaller than the sum of the urging force of the return spring and a maximum urging force of the transmission spring.Type: ApplicationFiled: June 4, 2015Publication date: December 10, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroaki EBUCHI, Makoto FUNAHASHI, Yuji Iwase, Shotaro KATO, Hidekazu NAGAI, Hiroto HASHIMOTO
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Publication number: 20150336559Abstract: A drive control device includes: a meshing engagement unit; an engine; a rotary machine; a detector detecting a predetermined parameter; and a controller configured to perform a release control of causing the rotary machine to output a second rotation torque in a direction opposite to a first rotation torque applied from the engine to the engagement unit at a time the engagement unit is released. The release control includes setting a magnitude of the second rotation torque to a predetermined value larger than a magnitude of the first rotation torque at a time the predetermined parameter change degree is not smaller than a threshold value and gradually decreasing the magnitude of the second rotation torque, and setting the magnitude of the second rotation torque to a magnitude smaller than the predetermined value at a time the predetermined parameter change degree is smaller than the threshold value.Type: ApplicationFiled: May 19, 2015Publication date: November 26, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroto HASHIMOTO, Yuji IWASE, Hiroaki EBUCHI, Hidekazu NAGAI, Shotaro KATO