Patents by Inventor Akira Murakami

Akira Murakami 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).

  • Publication number: 20180142315
    Abstract: A hardening apparatus comprises a tracing gauge that is a member having the same axis shape as the axis shape of a bent pipe and being held in an attitude identical to the bent pipe, and a tracing device that is a member which can move in the longitudinal direction of the bent pipe and the tracing gauge and can move in the direction perpendicular to the longitudinal direction. A guide part engaged with the tracing gauge in a manner slidable along the tracing gauge is held at one end of the tracing device, and a hardening device is held at the other end. A transportation device moves the hardening device in the longitudinal direction by moving the tracing device.
    Type: Application
    Filed: May 19, 2016
    Publication date: May 24, 2018
    Applicant: SANCO CO., LTD.
    Inventors: Yoshinori MORITA, Akira MURAKAMI, Tomoyuki TAKEDA, Fumio KANEDA, Haruo FUKUSHIMA
  • Patent number: 9963148
    Abstract: 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: Grant
    Filed: March 13, 2017
    Date of Patent: May 8, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroto Hashimoto, Akira Murakami, Hiroaki Kimura, Tomohito Ono
  • Publication number: 20180083714
    Abstract: A transmitting device according to an embodiment include a transmission unit, a storage unit, a cache unit, a reception unit, and a sifting processing unit. The transmission unit transmits a transmission photon to a receiving device. The storage unit stores transmission photon information including transmission timing at which the transmission photon is transmitted, a transmission bit indicated by the transmission photon, and a transmission base of the transmission photon The cache unit stores, one or more pieces of transmission information including the transmission timing after an elapse of a no-use period of the transmission photon. The reception unit receives, from the receiving device, the reception timing and a reception base of the reception photon. The sifting processing unit performs sifting processing on the transmission bit by making a correlation between the transmission base and the reception base on the basis of the reception timing and the transmission timing.
    Type: Application
    Filed: February 22, 2017
    Publication date: March 22, 2018
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Akira MURAKAMI, Yoshimichi TANIZAWA, Alex DIXON
  • Publication number: 20180056982
    Abstract: A control system for hybrid vehicles to properly select an operating mode during autonomous operation is provided. An operating mode of the hybrid vehicle is selected from a hybrid mode and an electric vehicle mode. A controller that is configured to: determine an existence of a passenger in a vehicle compartment; select the electric vehicle mode in a case that the hybrid vehicle is operated autonomously while carrying the passenger; and select the hybrid mode in a case that the hybrid vehicle is operated autonomously without carrying the passenger.
    Type: Application
    Filed: August 23, 2017
    Publication date: March 1, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahito ENDO, Yasuhiro OSHIUMI, Kensei HATA, Yasuyuki KATO, Yushi SEKI, Katsuya IWAZAKI, Akira MURAKAMI
  • Publication number: 20180056978
    Abstract: A vehicle control system to operate a vehicle autonomously with improved energy efficiency and ride quality is provided. A controller is configured to set a limit value of an operating point of an engine to reduce noises and vibrations. The operating point of the engine is restricted by the limit value within an acceptable region where an engine speed is higher than the limit value but an engine torque is lower than the limit value. The limit value is set to a first limit value when the vehicle is operated autonomously while carrying the passenger, and to a second limit value to expand the acceptable region when the vehicle is operated autonomously without carrying the passenger.
    Type: Application
    Filed: August 24, 2017
    Publication date: March 1, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kensei HATA, Yasuhiro OSHIUMI, Takahito ENDO, Yasuyuki KATO, Yushi SEKI, Katsuya IWAZAKI, Akira MURAKAMI
  • Patent number: 9887656
    Abstract: A current command value calculating unit (174) calculates current command values for a rotor winding (30) and current command values for a stator winding (20) with respect to a torque command value between a first rotor (28) and a second rotor (18) and a torque command value between a stator (16) and the second rotor (18) based on an evaluation function representing a total copper loss of the rotor winding (30) and the stator winding (20) and using first and second magnetic interference models. The first magnetic interference model represents a relationship of a linkage magnetic flux ?in of the rotor winding (30) with respect to a current Iin in the rotor winding (30) and a current Iout in the stator winding (20). The second magnetic interference model represents a relationship of a linkage magnetic flux ?out of the stator winding (20) with respect to the current Iin, Iout.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: February 6, 2018
    Assignees: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Wataru Hijikata, Takao Watanabe, Eiji Tsuchiya, Shohei Matsumoto, Masahide Uemura, Akira Murakami, Tomoyuki Tohyama
  • Publication number: 20180008981
    Abstract: The present invention provides a novel target analysis chip and analysis method for directly detecting a target such as a microRNA without performing PCR.
    Type: Application
    Filed: January 22, 2016
    Publication date: January 11, 2018
    Applicants: ARKRAY, Inc., NATIONAL UNIVERSITY CORPORATION KYOTO INSTITUTE OF TECHNOLOGY
    Inventors: Akira Murakami, Akio Kobori, Asako Yamayoshi, Yuichiro Noda, Masayuki Kondo
  • Publication number: 20170368942
    Abstract: A control system for a hybrid vehicle that can reduce a power loss resulting from shifting an operating mode from motor mode to hybrid mode is provided. A transmission that is adapted to distribute torque applied to an input element to a reaction element and an output element, and to change a ratio between a first torque delivered to the reaction element and a second torque delivered to the output element. A controller is configured to start an engine in a high mode in which a torque ratio of the output element to the input element is small if the vehicle speed is higher than a threshold value, and to start the engine in a low mode in which the torque ratio is greater if the vehicle speed is lower than the threshold value.
    Type: Application
    Filed: June 23, 2017
    Publication date: December 28, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahito ENDO, Hidekazu NAGAI, Kensei HATA, Akira MURAKAMI
  • Patent number: 9813237
    Abstract: According to an embodiment, a receiver is connected to transmitters through photon communication channels and data communication channels to generate identical cryptographic keys to be shared with each transmitter. The receiver includes a sharing unit, a key distilling unit, a data communication controller, and a calculator. The key sharing unit is configured to generate a shared bit string through quantum key distribution with each transmitter via a corresponding photon communication channel. The key distilling unit is configured to generate the cryptographic keys from the respective shared bit strings. The data communication controller is configured to receive from each transmitter first information about a corresponding cryptographic key via a corresponding data communication channel. The calculator is configured to calculate the photon timeslots based on at least the first information. The data communication controller is configured to transmit the photon timeslots to the transmitters.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: November 7, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Akira Murakami
  • Patent number: 9793784
    Abstract: There is provided a cooling structure whose performance for cooling ring members and brushes is enhanced. In a cooling structure applied to a slip ring device including ring members provided to an input shaft and brushes contacting with these ring members, the input shaft includes a shaft member where an external spline portion is formed, and a cylindrical member that is installed over the external circumference of the shaft member so that an internal spline portion formed on the cylindrical member is meshed with the external spline portion, and that the ring members are fixed to the cylindrical member. The internal spline portion is formed upon a portion of the inner circumferential surface of the cylindrical member that lies on the radially inward side of the ring members.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: October 17, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi Tominaga, Takahiro Shiina, Akira Murakami, Hitoshi Takayama, Shu Asami, Takao Watanabe, Kiyoshi Uetsuji, Shuji Yumoto, Hirofumi Fujiwara
  • Publication number: 20170291597
    Abstract: An engine starting control system for hybrid vehicles is provided to prevent a temporal drop in drive force when starting an engine. The control system maintains an operating mode of a switching mechanism when starting the engine by the first motor, in a case that the vehicle is propelled in the forward direction by the first motor and that the switching mechanism is in a second mode, or in a case that the vehicle is propelled in the reverse direction by the first motor and that the switching mechanism is in the first mode. Thereafter, the control system increases a rotational speed of the engine to a self-sustaining speed, switches the operating mode of the switching mechanism, and increases torque of the engine.
    Type: Application
    Filed: April 5, 2017
    Publication date: October 12, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kensei HATA, Akira MURAKAMI, Hidekazu NAGAI, Takahito ENDO
  • Publication number: 20170279540
    Abstract: According to an embodiment, a communication device is connected to another communication device through a quantum communication channel and a classical communication channel to share an encryption key. The device includes a photon detector, a measurer, a difference generator, and a transmitter. The photon detector is configured to detect photons transmitted from the other communication device through the quantum communication channel. The measurer is configured to measure time when each photon is detected by the photon detector as time stamp information. The difference generator is configured to generate difference time stamp information as a difference between time obtained by adding particular information to the time indicated by the time stamp information previously measured by the measurer and time indicated by the time stamp information subsequently measured by the measurer.
    Type: Application
    Filed: September 14, 2016
    Publication date: September 28, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Akira Murakami, Alex Dixon
  • Publication number: 20170267246
    Abstract: 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: Application
    Filed: March 13, 2017
    Publication date: September 21, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroto HASHIMOTO, Akira MURAKAMI, Hiroaki KIMURA, Tomohito ONO
  • Publication number: 20170232958
    Abstract: When an engine is started by causing a first motor coupled to first drive wheels to motor the engine while a hybrid vehicle is turning with the engine stopped, an electronic control unit controls output torque of a second motor, in such a direction as to curb change of a steering characteristic of the hybrid vehicle due to change of drive torque of the first drive wheels induced by motoring of the engine by the first motor.
    Type: Application
    Filed: February 14, 2017
    Publication date: August 17, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kensei HATA, Akira MURAKAMI, Hidekazu NAGAI, Takahito ENDO, Yuji IWASE
  • Patent number: 9716412
    Abstract: This rotor for a rotating electric motor includes a hollow cylindrical rotor core with a plurality of laminated electromagnetic steel plates. The inner and outer circumferential surfaces of the rotor core each face a magnetic gap. The rotor core is interposed between a first rotating support member and a second rotating support member. A flange is formed on a first end of a tubular pin protruding from a first hole of the first rotating support member. A tubular expansion part of the tubular pin plastically deforms due to fluid pressure so as to come into close contact with a through hole of the rotor core, the first hole of the first rotating support member, and a second hole of the second rotating support member.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: July 25, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hirohito Hayashi, Takahiro Shiina, Masahide Uemura, Akira Murakami, Tomoyuki Tohyama, Eiji Tsuchiya, Yasumitsu Osada, Wataru Hijikata, Takao Watanabe
  • Publication number: 20170182995
    Abstract: A drive system is configured to split driving force produced by an engine to a first motor side and an output gear side, and add driving force produced by a second motor that is driven with electric power generated by the first motor, to the driving force delivered from the output gear. A first planetary gear mechanism performs differential operation, using a first input element that receives the driving force produced by the engine, a first reaction-force element coupled to the first motor, and a first output element. A second planetary gear mechanism performs differential operation, using a second input element coupled to the first output element, a second output element coupled to the output gear, and a second reaction-force element. A first clutch mechanism selectively couples the first input element with the second reaction-force element. A first brake mechanism selectively inhibits rotation of the second reaction-force element.
    Type: Application
    Filed: December 21, 2016
    Publication date: June 29, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahito ENDO, Hidekazu NAGAI, Kensei HATA, Yuji IWASE, Akira MURAKAMI
  • Patent number: 9673689
    Abstract: Provided is a compound motor (14) comprising a magnet rotor (19) supported by bearings (B3, B4) in a rotatable manner, a winding rotor (20) supported by bearings (B5, B6) in a rotatable manner relative to the magnet rotor (19) at the inner side of the magnet rotor (19) and having rotor winding units (20b), and slip ring mechanisms (25). A space is formed in the inner circumference of the winding rotor (20). At least a part of the slip ring mechanisms (25) is arranged in the space of the inner circumference of the winding rotor (20). The bearings (B3 to B6) include bearings (B3, B6), the internal diameter of each is larger than the size of slip ring mechanisms (25) with respect to the radial direction. The bearings (B3, B6) are arranged outside the slip ring mechanisms (25) with respect to the radial direction.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: June 6, 2017
    Assignees: Toyota Jidosha Kabushiki Kaisha, Kabushiki Kaisha Toyota Chuo Kenkyusho, Aisin Seiki Kabushiki Kaisha
    Inventors: Takahiro Shiina, Akira Murakami, Tadashi Fujiyoshi, Yasumitsu Osada, Takao Watanabe, Shu Asami, Eiji Tsuchiya, Tomoyuki Tohyama
  • Publication number: 20170126161
    Abstract: A current command value calculating unit (174) calculates current command values for a rotor winding (30) and current command values for a stator winding (20) with respect to a torque command value between a first rotor (28) and a second rotor (18) and a torque command value between a stator (16) and the second rotor (18) based on an evaluation function representing a total copper loss of the rotor winding (30) and the stator winding (20) and using first and second magnetic interference models. The first magnetic interference model represents a relationship of a linkage magnetic flux ?in of the rotor winding (30) with respect to a current Iin in the rotor winding (30) and a current Iout in the stator winding (20). The second magnetic interference model represents a relationship of a linkage magnetic flux ?out of the stator winding (20) with respect to the current Iin, Iout.
    Type: Application
    Filed: March 18, 2015
    Publication date: May 4, 2017
    Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Wataru HIJIKATA, Takao WATANABE, Eiji TSUCHIYA, Shohei MATSUMOTO, Masahide UEMURA, Akira MURAKAMI, Tomoyuki TOHYAMA
  • Patent number: 9555794
    Abstract: A drive control system is for a hybrid vehicle. The drive control system includes a power split mechanism, a brake mechanism, a first motor, an output member, a second motor and an electronic control unit. The electronic control unit is configured to obtain a temperature of the power split mechanism based on a first time that is a duration of a motor driven state, allow the motor driven state when the obtained temperature obtained by the electronic control unit is lower than a predetermined upper limit temperature, and inhibit the motor driven state when the obtained temperature is higher than or equal to the upper limit temperature.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: January 31, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kensei Hata, Yuji Iwase, Yosuke Suzuki, Akira Murakami, Akiko Nishimine, Sohei Murata
  • Publication number: 20170008533
    Abstract: 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: Application
    Filed: July 8, 2016
    Publication date: January 12, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroaki EBUCHI, Akira MURAKAMI, Yuji IWASE, Shotaro KATO, Hidekazu NAGAI, Hiroto HASHIMOTO