Patents by Inventor Yutaka Arimura
Yutaka Arimura 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: 9573621Abstract: A power steering apparatus for a vehicle includes a column shaft, a column pipe rotatably supporting the column shaft through a plurality of bearings, and a torque sensor for detecting torque generated on the column shaft by using magnetism. The column pipe is composed of a steel pipe. The torque sensor includes a magnetically variable portion and a magnetic change detector. The magnetically variable portion is disposed on the column shaft and has a magnetic permeability that varies with the torque generated on the column shaft. The magnetic change detector is configured to detect a change in the magnetism of the magnetically variable portion. The magnetic change detector is attached to the column pipe by being inserted in an axial direction through an opening at an axial end of the column pipe.Type: GrantFiled: March 31, 2015Date of Patent: February 21, 2017Assignee: HONDA MOTOR CO., LTD.Inventors: Takehito Shiraishi, Yutaka Arimura, Takashi Miyoshi, Yasuo Shimizu
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Publication number: 20150274204Abstract: A power steering apparatus for a vehicle includes a column shaft, a column pipe rotatably supporting the column shaft through a plurality of bearings, and a torque sensor for detecting torque generated on the column shaft by using magnetism. The column pipe is composed of a steel pipe. The torque sensor includes a magnetically variable portion and a magnetic change detector. The magnetically variable portion is disposed on the column shaft and has a magnetic permeability that varies with the torque generated on the column shaft. The magnetic change detector is configured to detect a change in the magnetism of the magnetically variable portion. The magnetic change detector is attached to the column pipe by being inserted in an axial direction through an opening at an axial end of the column pipe.Type: ApplicationFiled: March 31, 2015Publication date: October 1, 2015Applicant: HONDA MOTOR CO., LTDInventors: Takehito Shiraishi, Yutaka Arimura, Takashi Miyoshi, Yasuo Shimizu
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Publication number: 20140339077Abstract: Disclosed is a plating device that has a plating tank that retains a plating fluid and carries out magnetic metal plating on a shaft shaped member immersed in the plating fluid as a negative electrode. The plating device is provided with: a plurality of shielding jigs that are fitted to the outer peripheral surface of the shaft shaped member and regulate the part of the shaft shaped member being plated; and a positive electrode provided in the vicinity of the shaft shaped member and having an output part that faces the part being plated. A center position in the axial direction of the shaft shaped member for the part being plated and a center position of the output part are aligned within a prescribed allowable value for the center positions.Type: ApplicationFiled: December 21, 2012Publication date: November 20, 2014Inventors: Yutaka Arimura, Yasuo Shimizu, Atsuhiko Yoneda
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Patent number: 8807260Abstract: A magnetostrictive torque sensor includes a magnetostrictive portion formed on a rotational shaft, a bobbin surrounding an outer circumference of the magnetostrictive portion, and a coil wound on the bobbin for detecting a change in magnetic property of the magnetostrictive portion. The bobbin fits over the magnetostrictive portion in contact with the magnetostrictive portion in such a manner as to allow rotation of the magnetostrictive portion relative to the bobbin. The magnetostrictive torque sensor is carried on an electrically assisted bicycle or an electric power steering apparatus of a vehicle.Type: GrantFiled: November 19, 2012Date of Patent: August 19, 2014Assignee: Honda Motor Co. Ltd.Inventors: Yasuo Shimizu, Yutaka Arimura, Masahiro Kuroki, Kentaro Ikegami
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Patent number: 8701503Abstract: Disclosed are a magnetostrictive torque sensor and an electrical power steering device, wherein a first torque sensor has: one magnetostrictive film provided on a steering shaft; a first coil and a second coil that detect changes in the magnetic characteristics of the magnetostrictive film; and a first housing that contains, at least, the steering shaft, the magnetostrictive film, the first coil, and the second coil. The first housing has a resin part, a cylindrical part made of a metal that is soft magnetic, and a flange part made of a metal that is soft magnetic. The resin part, the cylindrical part, and the flange part are formed as a unit.Type: GrantFiled: March 31, 2010Date of Patent: April 22, 2014Assignee: Honda Motor Co., Ltd.Inventors: Yasuo Shimizu, Atsuhiko Yoneda, Yutaka Arimura, Yoshihiro Oniwa
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Patent number: 8650969Abstract: A magnetostrictive torque sensor includes a rotation shaft, a magnetostrictive member, and a plurality of detectors. The rotation shaft is rotationally supported. The magnetostrictive member is disposed on a surface of the rotation shaft and being deformable in accordance with a magnitude of rotation torque applied to the rotation shaft to change magnetic permeability. The plurality of detectors are disposed on a periphery of the rotation shaft. Each of the detectors is configured to detect a change in magnetic permeability of the magnetostrictive member in a form of an electrical change. The detectors are configured to detect different amounts of electrical change from one another if amounts of change in deformation are same throughout the magnetostrictive member.Type: GrantFiled: November 22, 2011Date of Patent: February 18, 2014Assignee: Honda Motor Co., Ltd.Inventors: Yutaka Arimura, Yasuo Shimizu, Takeshi Wakabayashi
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Patent number: 8584533Abstract: A magnetostrictive torque sensor device which detects a torque applied to a rotary shaft is provided. The magnetostrictive torque sensor device includes a magnetostrictive portion provided on a surface of the rotary shaft, a coil and a cylindrical back-yoke disposed in outer periphery of the coil. The coil includes a bobbin arranged in outer periphery of the magnetostrictive portion, and a wire wound around the bobbin. A slit is provided on the back-yoke.Type: GrantFiled: March 2, 2009Date of Patent: November 19, 2013Assignee: Honda Motor Co., Ltd.Inventors: Takashi Miyoshi, Yoshihiro Oniwa, Yasuo Shimizu, Atsuhiko Yoneda, Yutaka Arimura, Katsuji Watanabe
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Publication number: 20120137789Abstract: a magnetostrictive torque sensor includes a rotation shaft, a magnetostrictive member, and a plurality of detectors. The rotation shaft is rotationally supported. The magnetostrictive member is disposed on a surface of the rotation shaft and being deformable in accordance with a magnitude of rotation torque applied to the rotation shaft to change magnetic permeability. The plurality of detectors are disposed on a periphery of the rotation shaft. Each of the detectors is configured to detect a change in magnetic permeability of the magnetostrictive member in a form of an electrical change. The detectors are configured to detect different amounts of electrical change from one another if amounts of change in deformation are same throughout the magnetostrictive member.Type: ApplicationFiled: November 22, 2011Publication date: June 7, 2012Applicant: HONDA MOTOR CO., LTD.Inventors: Yutaka ARIMURA, Yasuo SHIMIZU, Takeshi WAKABAYASHI
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Publication number: 20120018241Abstract: Disclosed are a magnetostrictive torque sensor and an electrical power steering device, wherein a first torque sensor has: one magnetostrictive film provided on a steering shaft; a first coil and a second coil that detect changes in the magnetic characteristics of the magnetostrictive film; and a first housing that contains, at least, the steering shaft, the magnetostrictive film, the first coil, and the second coil. The first housing has a resin part, a cylindrical part made of a metal that is soft magnetic, and a flange part made of a metal that is soft magnetic. The resin part, the cylindrical part, and the flange part are formed as a unit.Type: ApplicationFiled: March 31, 2010Publication date: January 26, 2012Applicant: HONDA MOTOR CO., LTD.Inventors: Yasuo Shimizu, Atsuhiko Yoneda, Yutaka Arimura, Yoshihiro Oniwa
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Patent number: 7640815Abstract: A magnetostriction type torque sensor is provided which includes magnetic property change material which is provided on a shaft and whose magnetic property changes in accordance with torque applied to the shaft, an excitation signal generator which generates an excitation signal whose voltage is converted into a predetermined voltage through a switching element, a plurality of detection coils to which the excitation signal generator applies the excitation signal, and which plurality of detection coils outputs voltage, which changes in accordance with change in the magnetic property of the magnetic property change material, between connection points between the detection coils, and an operational state monitor which monitors an operational state of the switching element.Type: GrantFiled: March 16, 2007Date of Patent: January 5, 2010Assignee: Honda Motor Co., Ltd.Inventors: Atsuhiko Yoneda, Yasuo Shimizu, Shunichiro Sueyoshi, Yoshihiro Oniwa, Yutaka Arimura, Takashi Miyoshi
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Publication number: 20090218162Abstract: A magnetostrictive torque sensor device which detects a torque applied to a rotary shaft is provided. The magnetostrictive torque sensor device includes a magnetostrictive portion provided on a surface of the rotary shaft, a coil and a cylindrical back-yoke disposed in outer periphery of the coil. The coil includes a bobbin arranged in outer periphery of the magnetostrictive portion, and a wire wound around the bobbin. A slit is provided on the back-yoke.Type: ApplicationFiled: March 2, 2009Publication date: September 3, 2009Applicant: Honda Motor Co., Ltd.Inventors: Takashi Miyoshi, Yoshihiro Oniwa, Yasuo Shimizu, Atsuhiko Yoneda, Yutaka Arimura, Katsuji Watanabe
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Patent number: 7568274Abstract: A method for manufacturing a magnetostrictive torque sensor device includes the steps of: providing a steering shaft or another such rotating shaft with two magnetostrictive parts endowed with magnetic anisotropy; disposing detection coils around the magnetostrictive parts to detect changes in magnetostrictive characteristics of the magnetostrictive parts; providing a detection circuit for bringing out detection signals from signals outputted from the detection coils; and adjusting a gain of a gain adjuster included in the detection circuit.Type: GrantFiled: August 30, 2007Date of Patent: August 4, 2009Assignee: Honda Motor Co., Ltd.Inventors: Atsuhiko Yoneda, Yasuo Shimizu, Hisao Asaumi, Yutaka Arimura
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Publication number: 20080053250Abstract: A method for manufacturing a magnetostrictive torque sensor device includes the steps of: providing a steering shaft or another such rotating shaft with two magnetostrictive parts endowed with magnetic anisotropy; disposing detection coils around the magnetostrictive parts to detect changes in magnetostrictive characteristics of the magnetostrictive parts; providing a detection circuit for bringing out detection signals from signals outputted from the detection coils; and adjusting a gain of a gain adjuster included in the detection circuit.Type: ApplicationFiled: August 30, 2007Publication date: March 6, 2008Inventors: Atsuhiko Yoneda, Yasuo Shimizu, Hisao Asaumi, Yutaka Arimura
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Publication number: 20070283768Abstract: A magnetostriction type torque sensor is provided which includes magnetic property change material which is provided on a shaft and whose magnetic property changes in accordance with torque applied to the shaft, an excitation signal generator which generates an excitation signal whose voltage is converted into a predetermined voltage through a switching element, a plurality of detection coils to which the excitation signal generator applies the excitation signal, and which plurality of detection coils outputs voltage, which changes in accordance with change in the magnetic property of the magnetic property change material, between connection points between the detection coils, and an operational state monitor which monitors an operational state of the switching element.Type: ApplicationFiled: March 16, 2007Publication date: December 13, 2007Inventors: Atsuhiko Yoneda, Yasuo Shimizu, Shunichiro Sueyoshi, Yoshihiro Oniwa, Yutaka Arimura, Takashi Miyoshi
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Patent number: 6885927Abstract: An apparatus for controlling an electric power steering system is provided, which has a microcomputer for determining a signal for target current, the other microcomputer for determining a signal for motor control, a motor drive circuit for driving a brushless motor. The apparatus has a feature that the microcomputers can back up each other in controlling an electric power steering system even if failure occurs in one of the microcomputers.Type: GrantFiled: April 4, 2003Date of Patent: April 26, 2005Assignee: Honda Giken Kogyo Kabushiki KaishaInventor: Yutaka Arimura
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Patent number: 6838844Abstract: An electric power steering apparatus includes a steering torque detector, a brushless motor PWM-driven with a three-phase alternating motor current, a target current setting section for setting a d-axis target current value and a q-axis target current value, motor current detectors for detecting motor current values supplied to the brushless motor, a three-phase AC/d-q coordinate transformation circuit, a first deviation calculation circuit for calculating a deviation of a current value of a q-axis detection signal from the q-axis target current value, a second deviation calculation circuit for calculating a deviation of a direct current value a d-axis detection current signal from the d-axis target current, a motor control section for controlling driving of the brushless motor through a vector control process on the basis of deviation signals outputted from the first and second deviation calculation circuits, and an attenuation device provided in a feedback transmission path of the q-axis detection current sType: GrantFiled: December 5, 2002Date of Patent: January 4, 2005Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yasuo Shimizu, Atsuhiko Yoneda, Yutaka Arimura
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Publication number: 20030200018Abstract: An apparatus for controlling an electric power steering system is provided, which has a microcomputer for determining a signal for target current, the other microcomputer for determining a signal for motor control, a motor drive circuit for driving a brushless motor. The apparatus has a feature that the microcomputers can back up each other in controlling an electric power steering system even if failure occurs in one of the microcomputers.Type: ApplicationFiled: April 4, 2003Publication date: October 23, 2003Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHAInventor: Yutaka Arimura
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Publication number: 20030107339Abstract: An electric power steering apparatus includes a steering torque detector, a brushless motor PWM-driven with a three-phase alternating motor current, a target current setting section for setting a d-axis target current value and a q-axis target current value, motor current detectors for detecting motor current values supplied to the brushless motor, a three-phase AC/d-q coordinate transformation circuit, a first deviation calculation circuit for calculating a deviation of a current value of a q-axis detection signal from the q-axis target current value, a second deviation calculation circuit for calculating a deviation of a direct current value a d-axis detection current signal from the d-axis target current, a motor control section for controlling driving of the brushless motor through a vector control process on the basis of deviation signals outputted from the first and second deviation calculation circuits, and an attenuation device provided in a feedback transmission path of the q-axis detection current sType: ApplicationFiled: December 5, 2002Publication date: June 12, 2003Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Yasuo Shimizu, Atsuhiko Yoneda, Yutaka Arimura
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Patent number: 6398285Abstract: The occupant protective apparatus includes one or more seats 1 respectively supported on a car body so as to be movable along the direction of a force acting on the car body in the case of a car collision and each including a seat belt 3 for restricting an occupant 2 seated on the seat 1, a fluid container 14, the capacity of which can be reduced as the car body is deformed in the car collision, and a force generating unit 5 for applying a force to the seat 1 in the back-and-forth direction of the car body in response to generation of the pressure of fluid filled in the fluid container, such pressure generation occurring when the capacity of the fluid container is reduced.Type: GrantFiled: December 6, 2000Date of Patent: June 4, 2002Assignee: Honda Giken Koygo Kabushiki KaishaInventors: Yasuki Motozawa, Yutaka Arimura
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Publication number: 20010015565Abstract: The occupant protective apparatus includes one or more seats 1 respectively supported on a car body so as to be movable along the direction of a force acting on the car body in the case of a car collision and each including a seat belt 3 for restricting an occupant 2 seated on the seat 1, a fluid container 14, the capacity of which can be reduced as the car body is deformed in the car collision, and a force generating unit 5 for applying a force to the seat 1 in the back-and-forth direction of the car body in response to generation of the pressure of fluid filled in the fluid container, such pressure generation occurring when the capacity of the fluid container is reduced.Type: ApplicationFiled: December 6, 2000Publication date: August 23, 2001Inventors: Yasuki Motozawa, Yutaka Arimura