Patents by Inventor Masayoshi IWATA
Masayoshi IWATA 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: 11287030Abstract: In a shift device, the placement of magnets relative to sensors can be changed by rotating a ball shaft of a lever. The sensors detect magnetic fields generated by the magnets in order to detect a shift position of the lever. Shields suppress a magnetic field outside the ball shaft from reaching the sensors. The magnets, the sensors, and the shields are disposed on the ball shaft. This enables a reduction in the size of the shift device.Type: GrantFiled: August 28, 2018Date of Patent: March 29, 2022Assignee: KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHOInventors: Takahiro Hirashita, Hiroki Ono, Masayoshi Iwata
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Patent number: 11022463Abstract: A position sensor includes a magnet that generates a magnetic field, and a magnetic detector that is positioned opposing the magnet to detect an inclination of the magnetic field caused by the magnet. The magnet and the magnetic detector move relative to each other when an operation member is automatically or manually operated. The position sensor detects an operation position of the operation member based on a detection signal of the magnetic detector. The magnet includes two magnets positioned to oppose each other to generate the magnetic field as a parallel magnetic field at a rotation center of a support structure that forms operation axes of the operation member in multiple directions. The magnetic detector is arranged between the two magnets positioned opposing each other.Type: GrantFiled: November 7, 2017Date of Patent: June 1, 2021Assignee: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventor: Masayoshi Iwata
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Publication number: 20200271219Abstract: In a shift device, the placement of magnets relative to sensors can be changed by rotating a ball shaft of a lever. The sensors detect magnetic fields generated by the magnets in order to detect a shift position of the lever. Shields suppress a magnetic field outside the ball shaft from reaching the sensors. The magnets, the sensors, and the shields are disposed on the ball shaft. This enables a reduction in the size of the shift device.Type: ApplicationFiled: August 28, 2018Publication date: August 27, 2020Inventors: Takahiro HIRASHITA, Hiroki ONO, Masayoshi IWATA
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Patent number: 10746289Abstract: A shift-by-wire system includes an actuator, a detent plate, a detent spring, a control unit, and a display device. The control unit includes a first position learning unit, a second position learning unit, and a power-on determination unit. When the power-on determination unit determines that the power on is the post-instantaneous interruption on while the vehicle power is turned on, the first position learning unit learns the first reference position or the second position learning unit learns the second reference position, (i) in a case where the display device still displays the N-range after the target-range determination unit determines the target range to the R-range while the display device displays the N-range or (ii) in a case where the display device displays the N-range after the target-range determination unit determines the target range to the N-range while the display device displays the R-range.Type: GrantFiled: September 8, 2017Date of Patent: August 18, 2020Assignees: DENSO CORPORATION, HONDA MOTOR CO., LTD.Inventors: Koji Sakaguchi, Masayoshi Iwata, Yuichiro Takemori, Taizo Mori
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Patent number: 10533660Abstract: In a hydraulic control device and a hydraulic control method of a transmission, in a case that an oil supplying section is supplying a first oil to a continuously variable transmission mechanism, a TCU outputs, to an LC control valve of the oil supplying section, a control signal for giving a command to start supply of a second oil to a torque converter if a pulley pressure detected by a pressure sensor reaches a pressure threshold value.Type: GrantFiled: April 26, 2018Date of Patent: January 14, 2020Assignee: HONDA MOTOR CO., LTD.Inventor: Masayoshi Iwata
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Publication number: 20200003580Abstract: A position sensor includes a magnet that generates a magnetic field, and a magnetic detector that is positioned opposing the magnet to detect an inclination of the magnetic field caused by the magnet. The magnet and the magnetic detector move relative to each other when an operation member is automatically or manually operated. The position sensor detects an operation position of the operation member based on a detection signal of the magnetic detector. The magnet includes two magnets positioned to oppose each other to generate the magnetic field as a parallel magnetic field at a rotation center of a support structure that forms operation axes of the operation member in multiple directions. The magnetic detector is arranged between the two magnets positioned opposing each other.Type: ApplicationFiled: November 7, 2017Publication date: January 2, 2020Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventor: Masayoshi IWATA
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Publication number: 20190203829Abstract: A shift-by-wire system includes an actuator, a detent plate, a detent spring, a control unit, and a display device. The control unit includes a first position learning unit, a second position learning unit, and a power-on determination unit. When the power-on determination unit determines that the power on is the post-instantaneous interruption on while the vehicle power is turned on, the first position learning unit learns the first reference position or the second position learning unit learns the second reference position, (i) in a case where the display device still displays the N-range after the target-range determination unit determines the target range to the R-range while the display device displays the N-range or (ii) in a case where the display device displays the N-range after the target-range determination unit determines the target range to the N-range while the display device displays the R-range.Type: ApplicationFiled: September 8, 2017Publication date: July 4, 2019Inventors: Koji SAKAGUCHI, Masayoshi IWATA, Yuichiro TAKEMORI, Taizo MORI
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Publication number: 20180313446Abstract: In a hydraulic control device and a hydraulic control method of a transmission, in a case that an oil supplying section is supplying a first oil to a continuously variable transmission mechanism, a TCU outputs, to an LC control valve of the oil supplying section, a control signal for giving a command to start supply of a second oil to a torque converter if a pulley pressure detected by a pressure sensor reaches a pressure threshold value.Type: ApplicationFiled: April 26, 2018Publication date: November 1, 2018Inventor: Masayoshi Iwata
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Patent number: 9970539Abstract: A shift position switch controller includes a reference position learner, learning a reference rotation position of an electric motor in a reference shift position, a target position setter, while setting a target rotation position based on an absolute rotation position detected by an absolute position detector until a satisfaction of a first condition, which is an initialization of a learned reference rotation position in the reference shift position or a second condition, which is a post-switch shift position being set as the reference shift position in a shift position switch instruction that is input after the initialization of the learned reference rotation position, and setting the target rotation position based on a rotation position that is detected by a rotation position detector with reference to the reference rotation position serving as a rotation start position.Type: GrantFiled: February 9, 2017Date of Patent: May 15, 2018Assignees: DENSO CORPORATION, HONDA MOTOR CO., LTD.Inventors: Koji Sakaguchi, Masayoshi Iwata, Yuichiro Takemori, Taizo Mori
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Publication number: 20170234423Abstract: A shift position switch controller includes a reference position learner, learning a reference rotation position of an electric motor in a reference shift position, a target position setter, while setting a target rotation position based on an absolute rotation position detected by an absolute position detector until a satisfaction of a first condition, which is an initialization of a learned reference rotation position in the reference shift position or a second condition, which is a post-switch shift position being set as the reference shift position in a shift position switch instruction that is input after the initialization of the learned reference rotation position, and setting the target rotation position based on a rotation position that is detected by a rotation position detector with reference to the reference rotation position serving as a rotation start position.Type: ApplicationFiled: February 9, 2017Publication date: August 17, 2017Inventors: Koji SAKAGUCHI, Masayoshi IWATA, Yuichiro TAKEMORI, Taizo MORI
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Patent number: 9671212Abstract: A position sensor that detects operation positions of an operation member includes an element array having three stages, each including one or more detection elements. A detected subject is detected by each detection element in two adjacent upstream and downstream stages to determine an operation position of the operation member. Whenever the operation member is shifted by one operation position, the detected subject is moved relative to the element array by one stage. Each detection element outputs a detection result of the detected subject. The element array includes at least three detection elements of which the detection results change whenever the operation member is shifted by one operation position. A detection element in the upstream side stage detects the detected subject before the operation position shifting, and a detection element in the downstream side stage detects the detected subject after the operation position shifting.Type: GrantFiled: July 12, 2013Date of Patent: June 6, 2017Assignee: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventor: Masayoshi Iwata
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Publication number: 20170059358Abstract: A position sensor detects the position of a shift lever that is moved along a shift pattern extending in three different directions from a neutral position. The position sensor includes a magnet that moves together with the shift lever when the shift lever is moved between the neutral position and any one of a reverse position, a drive position, and a home position, which are located in three directions from the neutral position. The position sensor also includes Hall IC elements that detect the magnet and generate outputs indicating detection of the magnet. The Hall IC elements are laid out so that the position of the shift lever can be determined from the outputs of the Hall IC elements.Type: ApplicationFiled: August 16, 2016Publication date: March 2, 2017Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventor: Masayoshi IWATA
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Patent number: 9163957Abstract: A position sensor for a transmission mode selector lever includes a magnet and three magnetic flux detection elements that detect magnetic flux of the magnet. A determination circuit determines an operation position of the transmission mode selector lever based on output levels of detection signals generated by the magnetic flux detection elements. The magnet includes first and second magnetized regions. The first and second magnetized regions are formed so that when the magnet is moved relative to the magnetic flux detection elements along a straight line, output levels of the detection signals generated by the magnetic flux detection elements change in accordance with a proportional relationship having a first or second gradient relative to the distance of the movement. The three detection elements are spaced apart from each other on a straight line that is parallel to the first and second straight lines.Type: GrantFiled: September 7, 2012Date of Patent: October 20, 2015Assignee: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventor: Masayoshi Iwata
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Patent number: 9027428Abstract: A non-contact sensor includes a substrate having a groove, two pattern coils arranged on opposite sides of the groove, a detected object connected to the shift lever and moved in cooperation with the shift lever along the groove, and a signal processing circuit that calculates a movement amount of the shift lever based on an output value provided from the pattern coils.Type: GrantFiled: June 18, 2013Date of Patent: May 12, 2015Assignee: Kabushiki Kaisha Tokai Rika Denki SeisakushoInventor: Masayoshi Iwata
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Publication number: 20140020495Abstract: A position sensor that detects operation positions of an operation member includes an element array having three stages, each including one or more detection elements. A detected subject is detected by each detection element in two adjacent upstream and downstream stages to determine an operation position of the operation member. Whenever the operation member is shifted by one operation position, the detected subject is moved relative to the element array by one stage. Each detection element outputs a detection result of the detected subject. The element array includes at least three detection elements of which the detection results change whenever the operation member is shifted by one operation position. A detection element in the upstream side stage detects the detected subject before the operation position shifting, and a detection element in the downstream side stage detects the detected subject after the operation position shifting.Type: ApplicationFiled: July 12, 2013Publication date: January 23, 2014Inventor: Masayoshi IWATA
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Publication number: 20130340557Abstract: A non-contact sensor includes a substrate having a groove, two pattern coils arranged on opposite sides of the groove, a detected object connected to the shift lever and moved in cooperation with the shift lever along the groove, and a signal processing circuit that calculates a movement amount of the shift lever based on an output value provided from the pattern coils.Type: ApplicationFiled: June 18, 2013Publication date: December 26, 2013Inventor: Masayoshi IWATA
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Publication number: 20130327173Abstract: An operation device that controls an apparatus. The operation device includes an operation member that is movable to a plurality of positions. The operation device sends an electric signal to the apparatus in accordance with the position of the operation member. A tactile force application mechanism applies tactile force to the operation member when the operation member is moved. The tactile force application mechanism includes a tactile force detection unit that detects the tactile force applied to the operation member and outputs a tactile force detection signal. A position determination unit determines the position of the operation member based on the tactile force detection signal.Type: ApplicationFiled: May 30, 2013Publication date: December 12, 2013Inventor: Masayoshi IWATA
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Publication number: 20130063133Abstract: A position sensor for a transmission mode selector lever includes a magnet and three magnetic flux detection elements that detect magnetic flux of the magnet. A determination circuit determines an operation position of the transmission mode selector lever based on output levels of detection signals generated by the magnetic flux detection elements. The magnet includes first and second magnetized regions. The first and second magnetized regions are formed so that when the magnet is moved relative to the magnetic flux detection elements along a straight line, output levels of the detection signals generated by the magnetic flux detection elements change in accordance with a proportional relationship having a first or second gradient relative to the distance of the movement. The three detection elements are spaced apart from each other on a straight line that is parallel to the first and second straight lines.Type: ApplicationFiled: September 7, 2012Publication date: March 14, 2013Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHOInventor: Masayoshi IWATA