Patents by Inventor Masato TOKUHARA
Masato TOKUHARA 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: 12208656Abstract: This control system comprises: a control device which, while a vehicle is driven, receives power to control the operation of a moving part and which, while the vehicle is stopped, does not receive power; and a system which is capable of communicating with the control device, and which, when the vehicle is stopped, receives power so as to be capable of ascertaining first information pertaining to time or which is capable of acquiring, during the driving, second information pertaining to times before and after when the vehicle was stopped. When the vehicle is restarted after being stopped, the control device uses at least one of the first information and the second information received from the system to ascertain the time elapsed while the vehicle was stopped, and uses the elapsed time to control the operation of the moving part.Type: GrantFiled: November 11, 2022Date of Patent: January 28, 2025Assignee: Hitachi Astemo, Ltd.Inventor: Masato Tokuhara
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Patent number: 12030582Abstract: A processing device is configured to perform a process of bringing a response speed of a first sensor close to a response speed of a second sensor when a value using a detection value of the first sensor is extracted at a timing determined by using an output value of the second sensor having a response speed different from that of the first sensor.Type: GrantFiled: March 17, 2022Date of Patent: July 9, 2024Assignee: Hitachi Astemo, Ltd.Inventor: Masato Tokuhara
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Patent number: 12017496Abstract: This motor shaft state detection method has: a rotation determination step for determining, using a detected current waveform of a motor, whether or not to be a non-rotational state in which the rotational speed of the motor is smaller than a predetermined speed; a current determination step for determining whether or not to be a supply state in which the absolute value of current supplied to the motor is larger than a predetermined reference value; and a determination step for, when it is determined to be the non-rotational state in the rotation determination step and it is determined to be the supply state in the current determination step, determining that the motor is in a shaft locked state.Type: GrantFiled: March 14, 2022Date of Patent: June 25, 2024Assignee: Hitachi Astemo, Ltd.Inventor: Masato Tokuhara
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Patent number: 11987091Abstract: A control device controls a damping force of a damping device, which damps a force generated between a vehicle body of a two-wheeled vehicle and at least one of a front wheel and a rear wheel, by using an angular velocity of rotational movement in a front-rear direction of an unsprung part of the two-wheeled vehicle, which is generated due to a difference between a velocity in an up-down direction of the front wheel and a velocity in the up-down direction of the rear wheel.Type: GrantFiled: April 28, 2021Date of Patent: May 21, 2024Assignee: HITACHI ASTEMO, LTD.Inventors: Kota Suzuki, Masato Tokuhara, Yosuke Murakami
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Publication number: 20230364960Abstract: This control system comprises: a control device which, while a vehicle is driven, receives power to control the operation of a moving part and which, while the vehicle is stopped, does not receive power; and a system which is capable of communicating with the control device, and which, when the vehicle is stopped, receives power so as to be capable of ascertaining first information pertaining to time or which is capable of acquiring, during the driving, second information pertaining to times before and after when the vehicle was stopped. When the vehicle is restarted after being stopped, the control device uses at least one of the first information and the second information received from the system to ascertain the time elapsed while the vehicle was stopped, and uses the elapsed time to control the operation of the moving part.Type: ApplicationFiled: November 11, 2022Publication date: November 16, 2023Applicant: Hitachi Astemo, Ltd.Inventor: Masato TOKUHARA
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Patent number: 11618527Abstract: A control device is configured to control a damping force of a damping device using a difference between a front-rear acceleration of a vehicle main body and a rotational acceleration of a vehicle wheel, the damping device being configured to dampen a force generated between the vehicle main body and the vehicle wheel.Type: GrantFiled: June 24, 2021Date of Patent: April 4, 2023Assignee: Hitachi Astemo, Ltd.Inventors: Masato Tokuhara, Kimitoshi Sato, Yosuke Murakami
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Publication number: 20220203795Abstract: This motor shaft state detection method has: a rotation determination step for determining, using a detected current waveform of a motor, whether or not to be a non-rotational state in which the rotational speed of the motor is smaller than a predetermined speed; a current determination step for determining whether or not to be a supply state in which the absolute value of current supplied to the motor is larger than a predetermined reference value; and a determination step for, when it is determined to be the non-rotational state in the rotation determination step and it is determined to be the supply state in the current determination step, determining that the motor is in a shaft locked state.Type: ApplicationFiled: March 14, 2022Publication date: June 30, 2022Applicant: Hitachi Astemo, Ltd.Inventor: Masato TOKUHARA
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Publication number: 20220204122Abstract: A processing device is configured to perform a process of bringing a response speed of a first sensor close to a response speed of a second sensor when a value using a detection value of the first sensor is extracted at a timing determined by using an output value of the second sensor having a response speed different from that of the first sensor.Type: ApplicationFiled: March 17, 2022Publication date: June 30, 2022Applicant: Hitachi Astemo, Ltd.Inventor: Masato TOKUHARA
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Patent number: 11313428Abstract: A stroke sensor system includes a conductor, a coil which moves relative to the conductor and is fitted to one end side of the conductor; and a ferromagnetic body which is arranged on an end position side of the coil. A position of an end portion on one end side of the conductor in a state where a fitting ratio between the conductor and the coil is maximized is defined as the end position. The ferromagnetic body is located on an opposite side to the conductor with the coil interposed therebetween.Type: GrantFiled: February 24, 2020Date of Patent: April 26, 2022Assignee: HITACHI ASTEMO, LTD.Inventors: Masato Tokuhara, Kota Suzuki, Yosuke Fujikawa, Naoya Kuroiwa, Yosuke Murakami
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Patent number: 11230155Abstract: A control apparatus for a suspension apparatus, includes: a vehicle speed acquiring section which acquires a vehicle speed as a speed of a vehicle; an acquisition section which acquires a stroke velocity of the suspension apparatus; a contribution ratio determining section which determines a contribution ratio between a first parameter and a second parameter based on the vehicle speed, the first parameter serving for controlling a damping force in a first speed region of the vehicle, the second parameter serving for controlling the damping force in a second speed region which is a speed region higher in speed than the first speed region; a change amount restricting section which restricts a change amount of the contribution ratio; and a damping force controlling section which controls the damping force of the suspension apparatus based on the restricted contribution ratio and the stroke velocity.Type: GrantFiled: October 31, 2019Date of Patent: January 25, 2022Assignee: HITACHI ASTEMO, LTD.Inventor: Masato Tokuhara
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Publication number: 20210316814Abstract: A control device is configured to control a damping force of a damping device using a difference between a front-rear acceleration of a vehicle main body and a rotational acceleration of a vehicle wheel, the damping device being configured to dampen a force generated between the vehicle main body and the vehicle wheel.Type: ApplicationFiled: June 24, 2021Publication date: October 14, 2021Applicant: Hitachi Astemo, Ltd.Inventors: Masato TOKUHARA, Kimitoshi SATO, Yosuke MURAKAMI
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Publication number: 20210245569Abstract: A control device controls a damping force of a damping device, which damps a force generated between a vehicle body of a two-wheeled vehicle and at least one of a front wheel and a rear wheel, by using an angular velocity of rotational movement in a front-rear direction of an unsprung part of the two-wheeled vehicle, which is generated due to a difference between a velocity in an up-down direction of the front wheel and a velocity in the up-down direction of the rear wheel.Type: ApplicationFiled: April 28, 2021Publication date: August 12, 2021Applicant: HITACHI ASTEMO, LTD.Inventors: Kota SUZUKI, Masato TOKUHARA, Yosuke MURAKAMI
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Publication number: 20200191228Abstract: A stroke sensor system includes a conductor, a coil which moves relative to the conductor and is fitted to one end side of the conductor; and a ferromagnetic body which is arranged on an end position side of the coil. A position of an end portion on one end side of the conductor in a state where a fitting ratio between the conductor and the coil is maximized is defined as the end position. The ferromagnetic body is located on an opposite side to the conductor with the coil interposed therebetween.Type: ApplicationFiled: February 24, 2020Publication date: June 18, 2020Applicant: Showa CorporationInventors: Masato TOKUHARA, Kota SUZUKI, Yosuke FUJIKAWA, Naoya KUROIWA, Yosuke MURAKAMI
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Publication number: 20200070613Abstract: A control apparatus for a suspension apparatus, includes: a vehicle speed acquiring section which acquires a vehicle speed as a speed of a vehicle; an acquisition section which acquires a stroke velocity of the suspension apparatus; a contribution ratio determining section which determines a contribution ratio between a first parameter and a second parameter based on the vehicle speed, the first parameter serving for controlling a damping force in a first speed region of the vehicle, the second parameter serving for controlling the damping force in a second speed region which is a speed region higher in speed than the first speed region; a change amount restricting section which restricts a change amount of the contribution ratio; and a damping force controlling section which controls the damping force of the suspension apparatus based on the restricted contribution ratio and the stroke velocity.Type: ApplicationFiled: October 31, 2019Publication date: March 5, 2020Applicant: Showa CorporationInventor: Masato TOKUHARA