Patents by Inventor Daiki Suyama

Daiki Suyama 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: 20140231174
    Abstract: A vehicle drive device having a rotating electrical machine, a speed change mechanism, and a case that accommodates the rotating electrical machine speed change mechanism. A first oil storage portion is provided so as to communicate with the speed change mechanism accommodating space. A hydraulic pump that supplies the oil in the first oil storage portion to the speed change mechanism and the rotating electrical machine. A second oil storage portion provided so as to communicate with the rotating electrical machine accommodating space. A discharge oil passage discharges the oil in the second oil storage portion to the first oil storage portion. The discharge oil passage includes a first opening that opens toward the first oil storage portion, and the first opening is provided so that its lower end is located above an oil level in the first oil storage portion during rotation of the hydraulic pump.
    Type: Application
    Filed: October 30, 2012
    Publication date: August 21, 2014
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Mikio Iwase, Daiki Suyama, Naoya Jinnai, Tatsuya Okishima, Masahiro Izuhara, Kensuke Wada, Yukihiko Ideshio, Yuji Inoue
  • Publication number: 20140124324
    Abstract: A hydraulic control device configured with a source pressure generation section, a hydraulic servo for a clutch provided between an engine and a motor, a control solenoid valve that outputs a regulated source pressure to the hydraulic servo, and a switching section that switches a hydraulic passage, which extends between the source pressure generation section and the hydraulic servo to supply the engagement pressure, between a first and second state in which the hydraulic passage has a high conduit resistance compared to the first state at least until the clutch is engaged. The switching section switches the hydraulic passage into the second state during a failure in which the control solenoid valve is de-energized and the source pressure is directly supplied to the hydraulic servo as the engagement pressure, and switches the hydraulic passage into the first state during normal times when the failure does not occur.
    Type: Application
    Filed: April 27, 2012
    Publication date: May 8, 2014
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Kensuke Wada, Yuhei Yoshioka, Tetsuya Yamaguchi, Daiki Suyama, Yuji Inoue, Yukihiko Idesho, Toshihiko Kamiya
  • Publication number: 20130193816
    Abstract: A vehicle drive device includes a rotating electrical machine; and a fluid coupling on one side and coaxial with the electrical machine. A rotor is coupled to a housing of the fluid coupling via a disk-like member. The disk-like member is coaxial with the electrical machine, and includes a main body, and an outer fixing portion. The main body is disk-shaped and between the electrical machine and the fluid coupling. The fluid coupling includes joint fixed to the outer fixing portion. The outer fixing portion has a truncated conical surface, a diameter of which increases from the electrical machine to the fluid coupling. The joint is fixed to the rotary housing where it overlaps the rotary housing viewed in an axial direction, and includes a contact surface contacted by the outer fixing portion. The contact surface does not overlap the electrical machine as viewed perpendicular to the contact surface.
    Type: Application
    Filed: December 26, 2012
    Publication date: August 1, 2013
    Inventors: Mikio IWASE, Daiki SUYAMA, Naoya JINNAI, Tatsuya OKISHIMA, Yuji INOUE, Yukihiko IDESHIO
  • Publication number: 20130111891
    Abstract: A vehicle drive includes a speed change mechanism connected to a rotary electric machine; an output member connected to the speed change mechanism and wheels; an engagement device changes a state of engagement between an input member connected to an engine and the speed change mechanism; a hydraulic pump driven by the engine or the rotary electric machine; a first pressure control device that controls pressure supplied from the pump and supplies the pressure to the speed change mechanism; a second, separate hydraulic pressure control device that controls the pressure supplied from the pump and supplies the pressure to the engagement device; and a case that houses the rotary electric machine, speed change mechanism, engagement device, and pump. At least the engagement device is housed in a space formed by the case, and the second hydraulic pressure control device is provided at a part of the case forming the space.
    Type: Application
    Filed: October 24, 2012
    Publication date: May 9, 2013
    Inventors: Mikio IWASE, Daiki SUYAMA, Naoya JINNAI, Kensuke WADA, Yuji INOUE, Yukihiko IDESHIO
  • Publication number: 20130030624
    Abstract: A hybrid drive apparatus includes an input member that is connected via a rotary electric machine and an input clutch to an internal combustion engine, a transmission device that has an engagement element for transmitting and starting, and that transmits rotation of the input member to an output member at a changed speed, an oil pump that is driven by the input member. The input clutch has a plurality of friction materials and an elastic member urging the plurality of friction materials in the pressing direction. The control device, when detecting a start preliminary operation by a driver, rotates the rotary electric machine to cause the oil pump to produce the circulating oil pressure that disengages the input clutch by canceling out the urging force of the elastic member, and engages the engagement element for starting, after disengaging the input clutch.
    Type: Application
    Filed: February 16, 2011
    Publication date: January 31, 2013
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Daiki Suyama, Toshihiko Kamiya
  • Publication number: 20120323425
    Abstract: A hybrid drive apparatus includes an input member that is drivingly connected to a rotary electric machine and drivingly connected via an input clutch to an internal combustion engine, an output member that is drivingly connected to the input member and transmits rotation of the input member to wheels, and a control device that controls the rotary electric machine. The control device is capable of performing valve opening/closing phase control that advances or retards opening/closing phases of valve elements provided in the internal combustion engine via a valve opening/closing phase adjusting mechanism and, with the internal combustion engine in a stopped state before starting a vehicle, advances the opening/closing phases of the valve elements to bring the opening/closing phases of the valve elements into an advanced phase state relative to predetermined reference phases, thus starting the vehicle with torque of the rotary electric machine in the advanced phase state.
    Type: Application
    Filed: February 16, 2011
    Publication date: December 20, 2012
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Daiki Suyama, Toshihiko Kamiya
  • Patent number: 7959534
    Abstract: When a sub transmission mechanism is switched to the LO-side gear stage, a hybrid control unit executes a control operation such that vehicle speed does not exceed limit vehicle speed determined in advance in accordance with the transmission gear ratio of LO-side gear stage. Specifically, the hybrid control unit reduces at least one of the driving torque generated by the engine and the second motor generator, so that rotation speed of the second motor generator does not exceed tolerable rotation speed. Further, the hybrid control unit reduces at least one of the driving torque generated by the engine and the second motor generator when any of temperatures respectively detected by temperature sensors exceed corresponding upper limit temperatures.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: June 14, 2011
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin Aw Co., Ltd.
    Inventors: Shinji Kasuga, Yutaka Taga, Daiki Suyama, Yoshiyuki Onozawa
  • Publication number: 20080254935
    Abstract: When a sub transmission mechanism is switched to the LO-side gear stage, a hybrid control unit executes a control operation such that vehicle speed does not exceed limit vehicle speed determined in advance in accordance with the transmission gear ratio of LO-side gear stage. Specifically, the hybrid control unit reduces at least one of the driving torque generated by the engine and the second motor generator, so that rotation speed of the second motor generator does not exceed tolerable rotation speed. Further, the hybrid control unit reduces at least one of the driving torque generated by the engine and the second motor generator when any of temperatures respectively detected by temperature sensors exceed corresponding upper limit temperatures.
    Type: Application
    Filed: April 10, 2008
    Publication date: October 16, 2008
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Shinji Kasuga, Yutaka Taga, Daiki Suyama, Yoshiyuki Onozawa
  • Patent number: 7157820
    Abstract: Plurality of air gaps are formed in a torus-shaped stator body of the resolver. If a straight line were drawn from a center point of the stator body toward the outside in the radial direction of the stator body and the straight line were rotated 360 degrees about the center point, the straight line would intersect with at least one of an inside air gap and an outside air gap. Therefore, magnetic flux (i.e., noise caused by magnetism) that has penetrated from the outer peripheral surface side of the stator body will always pass through a portion of the stator body that is to the outside in the radial direction of the air gaps, such that a large portion of the magnetic flux is eliminated by the air gaps.
    Type: Grant
    Filed: July 28, 2005
    Date of Patent: January 2, 2007
    Assignees: Aisin AW Co., Ltd, Aismagama Seiki Co., Ltd.
    Inventors: Satoshi Murakami, Daiki Suyama, Masuho Sakakibara, Kanji Kitazawa, Hiromi Makiuchi
  • Publication number: 20060043965
    Abstract: Plurality of air gaps are formed in a torus-shaped stator body of the resolver. If a straight line were drawn from a center point of the stator body toward the outside in the radial direction of the stator body and the straight line were rotated 360 degrees about the center point, the straight line would intersect with at least one of an inside air gap and an outside air gap. Therefore, magnetic flux (i.e., noise caused by magnetism) that has penetrated from the outer peripheral surface side of the stator body will always pass through a portion of the stator body that is to the outside in the radial direction of the air gaps, such that a large portion of the magnetic flux is eliminated by the air gaps.
    Type: Application
    Filed: July 28, 2005
    Publication date: March 2, 2006
    Inventors: Satoshi Murakami, Daiki Suyama, Masuho Sakakibara, Kanji Kitazawa, Hiromi Makiuchi