Patents by Inventor Junichi Murase
Junichi Murase 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: 12227164Abstract: An electrified vehicle disclosed in the present specification includes: a motor configured to rotate a drive wheel of the electrified vehicle; a sensor configured to detect a motor rotation number that is the number of rotations of the motor; and a control device configured to perform feedback control of the motor rotation number based on a value detected by the sensor. The control device is configured to perform during the feedback control a process of extracting a vibration component in a predetermined frequency band from the value detected by the sensor, a process of calculating an integrated value by integrating the extracted vibration component for a predetermined period, and a process of determining whether the calculated integrated value falls within a predetermined abnormal range.Type: GrantFiled: July 28, 2022Date of Patent: February 18, 2025Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUBARU CORPORATIONInventors: Junichi Murase, Hideki Kubonoya, Masamichi Iwama, Hiroshi Ienaga
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Patent number: 11722080Abstract: A vehicle includes a main motor for traveling and an electronic control unit that controls the main motor. The electronic control unit is configured to: extract, from time series data of a rotation speed of the main motor, vibration data in a predetermined frequency band that includes resonance frequency of a drive system that includes the main motor; lower an upper limit value of output torque of the main motor from a normal upper limit value to a first upper limit value lower than the normal upper limit value when magnitude of vibration obtained from the extracted vibration data exceeds a first threshold value; and lower the upper limit value of output torque of the main motor to a second upper limit value lower than the first upper limit value when the magnitude of the vibration exceeds a second threshold value larger than the first threshold value.Type: GrantFiled: December 15, 2021Date of Patent: August 8, 2023Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUBARU CORPORATIONInventors: Hiroshi Monna, Shinichiro Noda, Junichi Murase, Takuya Horie
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Publication number: 20230102024Abstract: In an electrified vehicle, a vibration damping control device performs vibration damping control for canceling or reducing, with the use of regenerative braking, a predetermined vibration component by monitoring the vibration component and controlling a generator control device depending on the vibration component. A system control device determines whether the vibration damping control is performable based on at least a charge status of a battery. An anti-lock braking system control device transmits a request signal to the system control device while performing anti-lock braking system control. The system control device transmits a command signal to the vibration damping control device when the vibration damping control is determined to be performable and the request signal is received from the anti-lock braking system control device. The vibration damping control device performs the vibration damping control when the command signal is received from the system control device.Type: ApplicationFiled: July 13, 2022Publication date: March 30, 2023Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUBARU CORPORATIONInventor: Junichi Murase
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Publication number: 20230090814Abstract: An electrified vehicle disclosed in the present specification includes: a motor configured to rotate a drive wheel of the electrified vehicle; a sensor configured to detect a motor rotation number that is the number of rotations of the motor; and a control device configured to perform feedback control of the motor rotation number based on a value detected by the sensor. The control device is configured to perform during the feedback control a process of extracting a vibration component in a predetermined frequency band from the value detected by the sensor, a process of calculating an integrated value by integrating the extracted vibration component for a predetermined period, and a process of determining whether the calculated integrated value falls within a predetermined abnormal range.Type: ApplicationFiled: July 28, 2022Publication date: March 23, 2023Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUBARU CORPORATIONInventors: Junichi Murase, Hideki Kubonoya, Masamichi Iwama, Hiroshi Ienaga
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Publication number: 20220200496Abstract: A vehicle includes a main motor for traveling and an electronic control unit that controls the main motor. The electronic control unit is configured to: extract, from time series data of a rotation speed of the main motor, vibration data in a predetermined frequency band that includes resonance frequency of a drive system that includes the main motor; lower an upper limit value of output torque of the main motor from a normal upper limit value to a first upper limit value lower than the normal upper limit value when magnitude of vibration obtained from the extracted vibration data exceeds a first threshold value; and lower the upper limit value of output torque of the main motor to a second upper limit value lower than the first upper limit value when the magnitude of the vibration exceeds a second threshold value larger than the first threshold value.Type: ApplicationFiled: December 15, 2021Publication date: June 23, 2022Inventors: Hiroshi Monna, Shinichiro Noda, Junichi Murase, Takuya Horie
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Patent number: 11345347Abstract: A brake control device for a vehicle includes: a motor connected to wheels; a hydraulic brake that generates a friction braking force based on frictional contact with a brake rotor that integrally rotates with the wheels; a controller that performs coordination control of regenerative brake control, in which a regenerative power generation is performed by the motor on a basis of rotation of the wheels to apply a regenerative braking force to the wheels, and hydraulic brake control, in which the hydraulic brake is operated; and a battery that exchanges power with the motor. Further, in a case where a temperature of the brake rotor is higher than a predetermined temperature when input to the battery is restricted in a state where there is a deceleration request, the controller reduces the friction braking force, and performs the regenerative brake control while power is consumed by an electric device.Type: GrantFiled: October 15, 2019Date of Patent: May 31, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Junichi Murase
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Publication number: 20210078582Abstract: A control system for a vehicle control system that stabilizes behavior of the vehicle during propulsion on a slippery road, by preventing an abrupt change in drive torque and an occurrence of hunting of a motor. When a coefficient of friction of a road surface is equal to or lower than a threshold value, a controller calculates a target motor speed that can adjust a slip ratio of a wheel to a target slip ratio, and executes a first feedback control to motor control torque thereby adjusting a motor speed to a target speed.Type: ApplicationFiled: September 10, 2020Publication date: March 18, 2021Inventor: Junichi Murase
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Publication number: 20200254983Abstract: A brake force control system configured to allow a driver to control brake force finely only by operating an accelerator pedal, and to decelerate a vehicle to a target speed only by operating the accelerator pedal. The control system calculates a target deceleration to travel through a target site at a target speed in accordance with a decelerating factor. If a reference deceleration generated by returning the accelerator pedal to an initial position is equal to or less than the target deceleration, the control system increases the reference deceleration.Type: ApplicationFiled: January 30, 2020Publication date: August 13, 2020Applicant: Toyota Jidosha Kabushiki KaishaInventors: Yusuke SUZUKI, Masaki OKAMURA, Junichi MURASE, Fumito ITOH
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Publication number: 20200122728Abstract: A brake control device for a vehicle includes: a motor connected to wheels; a hydraulic brake that generates a friction braking force based on frictional contact with a brake rotor that integrally rotates with the wheels; a controller that performs coordination control of regenerative brake control, in which a regenerative power generation is performed by the motor on a basis of rotation of the wheels to apply a regenerative braking force to the wheels, and hydraulic brake control, in which the hydraulic brake is operated; and a battery that exchanges power with the motor. Further, in a case where a temperature of the brake rotor is higher than a predetermined temperature when input to the battery is restricted in a state where there is a deceleration request, the controller reduces the friction braking force, and performs the regenerative brake control while power is consumed by an electric device.Type: ApplicationFiled: October 15, 2019Publication date: April 23, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Junichi MURASE
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Patent number: 10526957Abstract: A control device for an internal combustion engine including a turbocharger and a negative-pressure waste gate valve includes an electronic control unit configured i) to apply a first drive current value to a pressure regulation valve so as to maintain an opening degree of the waste gate valve in a fully closed state in a case where an actual boost pressure is lower than a target boost pressure and a boost pressure difference between the actual boost pressure and the target boost pressure is equal to or larger than a threshold, and ii) to apply a second drive current value that is smaller than the first drive current value to the pressure regulation valve in a case where the actual boost pressure is lower than the target boost pressure and the boost pressure difference is smaller than the threshold.Type: GrantFiled: April 16, 2018Date of Patent: January 7, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinsuke Aoyagi, Junichi Murase
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Publication number: 20180361923Abstract: A smartphone disposed in a passenger compartment includes a cable connecting to a USB receptacle provided in a vehicle. An instrument panel, which is an interior panel, includes a holding groove that receives and holds the cable of the smartphone. Movement of the cable can be restricted by holding the cable in the holding groove. A light emitting portion may be disposed along the holding groove to indicate the position of the holding groove in the dark.Type: ApplicationFiled: June 8, 2018Publication date: December 20, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kosuke HAYASHIDA, Akihide FUKUYAMA, Koji KUDO, Junichi MURASE
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Publication number: 20180328269Abstract: A control device for an internal combustion engine including a turbocharger and a negative-pressure waste gate valve includes an electronic control unit configured i) to apply a first drive current value to a pressure regulation valve so as to maintain an opening degree of the waste gate valve in a fully closed state in a case where an actual boost pressure is lower than a target boost pressure and a boost pressure difference between the actual boost pressure and the target boost pressure is equal to or larger than a threshold, and ii) to apply a second drive current value that is smaller than the first drive current value to the pressure regulation valve in a case where the actual boost pressure is lower than the target boost pressure and the boost pressure difference is smaller than the threshold.Type: ApplicationFiled: April 16, 2018Publication date: November 15, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinsuke AOYAGI, Junichi MURASE
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Patent number: 10094849Abstract: A rough road determination device (100) is mounted on a vehicle (1) that is equipped with an internal combustion engine (10) having a crank angle sensor (31). This rough road determination device is equipped with determination means (20) for determining whether or not a road on which the vehicle travels is a rough road, by comparing a first amplitude fluctuation amount as an amplitude fluctuation amount of one pulse of an output of the crank angle sensor, which is determined in advance on the basis of a rotational speed of the internal combustion engine, with a second amplitude fluctuation amount as an amplitude fluctuation amount of one pulse that is actually output from the crank angle sensor.Type: GrantFiled: March 28, 2012Date of Patent: October 9, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Ryo Hasegawa, Yukitoshi Aoyama, Junichi Murase, Daisuke Hayashi
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Publication number: 20150025836Abstract: A rough road determination device (100) is mounted on a vehicle (1) that is equipped with an internal combustion engine (10) having a crank angle sensor (31). This rough road determination device is equipped with determination means (20) for determining whether or not a road on which the vehicle travels is a rough road, by comparing a first amplitude fluctuation amount as an amplitude fluctuation amount of one pulse of an output of the crank angle sensor, which is determined in advance on the basis of a rotational speed of the internal combustion engine, with a second amplitude fluctuation amount as an amplitude fluctuation amount of one pulse that is actually output from the crank angle sensor.Type: ApplicationFiled: March 28, 2012Publication date: January 22, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Ryo Hasegawa, Yukitoshi Aoyama, Junichi Murase, Daisuke Hayashi