Patents by Inventor Shinya Kamada

Shinya Kamada 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).

  • Patent number: 10767706
    Abstract: A frictional engagement element includes: a first piston, a second piston, a first urging member for urging the first piston in a direction of releasing a friction plate, and a second urging member for urging the second piston in the direction of releasing the friction plate with an urging force larger than the urging force of the first urging member. One of the first and second pistons has a communicating hole for connecting an engaging hydraulic chamber with an opposite hydraulic chamber and the other of the first and second pistons has a valve part for closing the communicating hole. The difference in travel distance between the first and second pistons in motion due to the different urging forces of the first and second urging members causes the valve part to open the communicating hole.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: September 8, 2020
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Tomotaka Ishizaka, Tatsuhiko Iwasaki, Norio Iwashita, Tatsutoshi Mizobe, Kaori Sako, Tadashi Saito, Tomohiro Kubo, Manabu Sasahara, Yutaro Fukuda, Shinya Kamada
  • Patent number: 10746234
    Abstract: An automatic transmission includes a piston movable in an axial direction, a plurality of friction plates disposed on a side of a first surface of the piston, a fastening hydraulic chamber applying a hydraulic pressure to a second surface of the piston to move the piston to a fastening position where the friction plates are pressed to be fastened to each other, a release hydraulic chamber applying a hydraulic pressure to the first surface of the piston to move the piston to a release position where the friction plates are released, and a hydraulic pressure control valve that supplies and discharges the hydraulic pressure to and from each of the fastening hydraulic chamber and the release hydraulic chamber. An area of the second surface of the piston for receiving the hydraulic pressure is set to be larger than an area of the first surface for receiving the hydraulic pressure.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: August 18, 2020
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Yutaro Fukuda, Tadashi Saito, Masahiro Kaji, Manabu Sasahara, Tomohiro Kubo, Shinya Kamada, Norio Iwashita, Kaori Sako, Tomotaka Ishizaka, Tatsuhiko Iwasaki, Koshiro Saji, Tatsutoshi Mizobe
  • Patent number: 10677314
    Abstract: A power transmission apparatus with a centrifugal pendulum damper is realized, which can effectively suppress torque fluctuation and vibration noise of a vehicle while avoiding size increase of a centrifugal pendulum damper and deterioration of reliability of the centrifugal pendulum damper by high-speed rotation. A power transmission apparatus with a centrifugal pendulum damper includes: a centrifugal pendulum damper coupled to an input shaft through a speed-increasing mechanism configured to increase speed of rotation of the input shaft; and an engagement/disengagement mechanism capable of realizing and cutting off power transmission from the input shaft to the centrifugal pendulum damper.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: June 9, 2020
    Assignee: Mazda Motor Corporation
    Inventors: Kyosei Nakashima, Kazuhiro Tanaka, Norio Iwashita, Shinya Kamada, Hiroo Akagi, Tomokazu Kinoshita, Hiroyuki Okayama, Narihito Hongawara, Keiji Bouda
  • Patent number: 10385931
    Abstract: A transmission brake device includes: a friction plate set configured such that a plurality of rotation-side friction plates; an engaging piston disposed on an axial side of the friction plate set; a clearance adjustment piston disposed on a side of the engaging piston opposite to the friction plate set; a clearance adjustment hydraulic chamber configured to move the clearance adjustment piston; and an engaging hydraulic chamber configured to move the engaging piston; a biasing member disposed between each adjacent pair of the fixed-side friction plates, the biasing member being configured to bias each adjacent pair of the fixed-side friction plates in directions away from each other. The biasing member distributes the clutch clearance in a gap between each adjacent pair of the fixed-side friction plates when a hydraulic pressure is supplied only to the clearance adjustment hydraulic chamber.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: August 20, 2019
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Tatsuhiko Iwasaki, Shinya Kamada, Yasuhiro Ogauchi
  • Patent number: 10302191
    Abstract: A transmission is provided including a transmission case accommodating a transmission mechanism, a hydraulic controller having a valve body and a valve for controlling the transmission mechanism, the valve body formed with a valve insertion hole into which the valve is inserted, and an oil path communicating with the valve insertion hole, and an oil storage for storing oil. At least one of the valve body and the oil storage is integrally formed with the transmission case.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: May 28, 2019
    Assignee: Mazda Motor Corporation
    Inventors: Tatsuya Uesugi, Kazuhiko Ueda, Shinya Kamada, Shotaro Nagai, Koshiro Saji
  • Patent number: 10184556
    Abstract: A brake device of a transmission according to the present invention includes: a rotary-side holding member including an inner peripheral surface having a cylindrical surface shape about an axis extending in a forward/rearward direction and configured to hold a rotary-side friction plate on the inner peripheral surface; a fixed-side holding member including an outer peripheral surface having a cylindrical surface shape about the axis extending in the forward/rearward direction and configured to hold a fixed-side friction plate on the outer peripheral surface; and a lubricating oil supply portion supplying lubricating oil to the fixed-side friction plate and the rotary-side friction plate. The fixed-side holding member is provided in a transmission casing so as not to rotate. The rotary-side holding member is provided in the transmission casing at a radially outer side of the fixed-side holding member and is rotatable about a central axis of the inner peripheral surface.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: January 22, 2019
    Assignee: Mazda Motor Corporation
    Inventors: Tatsuhiko Iwasaki, Shinya Kamada, Tatsutoshi Mizobe
  • Publication number: 20180347639
    Abstract: A frictional engagement element includes: a first piston, a second piston, a first urging member for urging the first piston in a direction of releasing a friction plate, and a second urging member for urging the second piston in the direction of releasing the friction plate with an urging force larger than the urging force of the first urging member. One of the first and second pistons has a communicating hole for connecting an engaging hydraulic chamber with an opposite hydraulic chamber and the other of the first and second pistons has a valve part for closing the communicating hole. The difference in travel distance between the first and second pistons in motion due to the different urging forces of the first and second urging members causes the valve part to open the communicating hole.
    Type: Application
    Filed: March 21, 2017
    Publication date: December 6, 2018
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Tomotaka ISHIZAKA, Tatsuhiko IWASAKI, Norio IWASHITA, Tatsutoshi MIZOBE, Kaori SAKO, Tadashi SAITO, Tomohiro KUBO, Manabu SASAHARA, Yutaro FUKUDA, Shinya KAMADA
  • Patent number: 10128547
    Abstract: Provided is a method for producing a lithium secondary battery in which localized precipitation of a foreign metal in the negative electrode can be reliably suppressed in a shorter time, regardless of, for instance, electrode type or electrode variability. The production method is a method for producing a secondary battery that includes a positive electrode provided with a positive electrode active material layer, a negative electrode provided with a negative electrode active material layer, and a nonaqueous electrolyte. The method comprises a step of constructing a cell including the positive electrode, the negative electrode and the nonaqueous electrolyte; a micro-charging step of performing charging over one hour or longer, up to 0.01% to 0.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: November 13, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hisataka Fujimaki, Hiroshi Kawadu, Shinya Kamada, Hisanao Kojima
  • Patent number: 10113638
    Abstract: An object of the present invention is, even if an abnormality occurs in an oil pressure circuit of an automatic transmission, to avoid traveling performance deterioration by the abnormality when gear change is performed. The present invention provides a control device of an automatic transmission and a method of controlling the automatic transmission, each of which switches from a normal state to an abnormality diagnosis state at a predetermined change gear ratio to diagnose whether there is an abnormality in an automatic transmission, the normal state being a state where an oil pressure supply portion supplies oil pressure to a predetermined friction engaging element, the abnormality diagnosis state being a state where an abnormality diagnosis oil pressure supply portion including an oil pressure supply passage different from an oil pressure supply passage of the oil pressure supply portion supplies the oil pressure to the predetermined friction engaging element.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: October 30, 2018
    Assignee: Mazda Motor Corporation
    Inventors: Shinya Kamada, Yasuo Shigenaka, Motomi Kobayashi
  • Publication number: 20180283492
    Abstract: A power transmission apparatus with a centrifugal pendulum damper is realized, which can effectively suppress torque fluctuation and vibration noise of a vehicle while avoiding size increase of a centrifugal pendulum damper and deterioration of reliability of the centrifugal pendulum damper by high-speed rotation. A power transmission apparatus with a centrifugal pendulum damper includes: a centrifugal pendulum damper coupled to an input shaft through a speed-increasing mechanism configured to increase speed of rotation of the input shaft; and an engagement/disengagement mechanism capable of realizing and cutting off power transmission from the input shaft to the centrifugal pendulum damper.
    Type: Application
    Filed: September 26, 2016
    Publication date: October 4, 2018
    Inventors: Kyosei Nakashima, Kazuhiro Tanaka, Norio Iwashita, Shinya Kamada, Hiroo Akagi, Tomokazu Kinoshita, Hiroyuki Okayama, Narihito Hongawara, Keiji Bouda
  • Publication number: 20180274600
    Abstract: An automatic transmission includes a piston movable in an axial direction, a plurality of friction plates disposed on a side of a first surface of the piston, a fastening hydraulic chamber applying a hydraulic pressure to a second surface of the piston to move the piston to a fastening position where the friction plates are pressed to be fastened to each other, a release hydraulic chamber applying a hydraulic pressure to the first surface of the piston to move the piston to a release position where the friction plates are released, and a hydraulic pressure control valve that supplies and discharges the hydraulic pressure to and from each of the fastening hydraulic chamber and the release hydraulic chamber. An area of the second surface of the piston for receiving the hydraulic pressure is set to be larger than an area of the first surface for receiving the hydraulic pressure.
    Type: Application
    Filed: February 16, 2017
    Publication date: September 27, 2018
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Yutaro FUKUDA, Tadashi SAITO, Masahiro KAJI, Manabu SASAHARA, Tomohiro KUBO, Shinya KAMADA, Norio IWASHITA, Kaori SAKO, Tomotaka ISHIZAKA, Tatsuhiko IWASAKI, Koshiro SAJI, Tatsutoshi MIZOBE
  • Patent number: 10012310
    Abstract: A hydraulic control unit for an automatic transmission has a mechanically-operated oil pump (6), an electrically-operated oil pump (106) actuated while an engine (2) is automatically shut down, and a hydraulic pressure circuit (100) which controls supply of hydraulic pressure to a frictional engagement element (40, 60) to be engaged, in the automatic transmission, at a vehicle's start. In the hydraulic pressure circuit, discharge oil from the electrically-operated oil pump is drained from a predetermined drain portion (154) when a selector valve (120) is in the first state (in which the mechanically-operated oil pump is a source of the supply of the hydraulic pressure to the frictional engagement element), whereas less discharge oil is drained from the drain portion, compared to the first state, when the selector valve (120) is in the second state (in which the electrically-operated oil pump is the source of the supply of the hydraulic pressure).
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: July 3, 2018
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Koshiro Saji, Shinya Kamada
  • Publication number: 20180180070
    Abstract: Disclosed herein is a valve body (10) for a hydraulic control system. The valve body (10) has a plurality of valve insertion holes (33, 34) into which a plurality of valves are inserted, respectively, and a plurality of oil passages (69) each communicating with at least one of the valve insertion holes (33, 34). The valve body (10) includes: an insertion hole arrangement member (11) provided with the valve insertion holes (33, 34) of the valve body (10), which are arranged in a concentrated manner; and an oil passage arrangement member (12) placed on the insertion hole arrangement member (11), and provided with the oil passages (69) of the valve body (10), which are arranged in a concentrated manner.
    Type: Application
    Filed: June 21, 2016
    Publication date: June 28, 2018
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Tatsuya UESUGI, Kazuhiko UEDA, Shinya KAMADA, Shotaro NAGAI, Koshiro SAJI
  • Patent number: 9989127
    Abstract: An automatic transmission includes a first planetary gear set, a second planetary gear set, and a first brake. A first sun gear includes a first split sun gear on a drive source side, and a second split sun gear on a side opposite to the drive source. The first spilt sun gear is coupled to the first brake, and is fixed to a transmission case during engagement of the first brake. The second split sun gear is constantly coupled to a second sun gear. An input shaft is constantly coupled to a first carrier while passing through the first split sun gear, and between the first and second split sun gears. An output shaft is constantly coupled to a second carrier.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: June 5, 2018
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Shinya Kamada, Tatsuhiko Iwasaki
  • Patent number: 9975553
    Abstract: An automatic transmission includes a first frictional engagement element (a low clutch 40), a second frictional engagement element (an L/R brake 60), two hydraulic chambers (a gap adjustment chamber 64 and a pressure chamber 65) provided in the second frictional engagement element, a first hydraulic pressure generator 101 (an electric pump 101) generating a hydraulic pressure during an automatic stop of the engine, and a control unit (a control unit 200) controlling the hydraulic pressure in the first and second frictional engagement elements. The control unit supplies the hydraulic pressure generated by the first hydraulic pressure generator to the first frictional engagement element and one of the two hydraulic chambers of the second frictional engagement element when the automatic transmission is in the non-traveling range and the engine has been automatically stopped.
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: May 22, 2018
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Koshiro Saji, Shinya Kamada, Shotaro Nagai
  • Patent number: 9964185
    Abstract: Disclosed is an automatic transmission (10) in which, of four planetary gear sets (PG1, PG2, PG3, and PG4), two planetary gear sets (PG2, PG3) are arranged such that one of the two planetary gear sets (PG2, PG3) is disposed radially inward from the other to form a two-stage planetary gear set (PGt). One planetary gear set (PG1) of the other two planetary gear sets functions as a specified planetary gear set disposed adjacent to the two-stage planetary gear set in a transmission axial direction. A carrier (C3) of the radially outer planetary gear set (PG3) of the two-stage planetary gear set, a carrier (C1) of the specified planetary gear set, and an output section (an output gear (13)) are always engaged together.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: May 8, 2018
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Yasuhiro Ogauchi, Shinya Kamada, Tatsuhiko Iwasaki
  • Patent number: 9958065
    Abstract: A brake device of a transmission is provided. The brake device includes a friction plate set including fixed friction plates and rotatable friction plates alternately disposed with each other, an engaging piston, and a clearance adjusting piston. A clearance adjusting hydraulic chamber is formed on a side of the clearance adjusting piston opposite to the friction plate set, and a concave portion is formed in a surface of the clearance adjusting piston on a friction plate set side. A base part of the engaging piston on a side opposite to the friction plate set is slidably fitted into the concave portion of the clearance adjusting piston and an engaging hydraulic chamber is formed by the base part and the concave part.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: May 1, 2018
    Assignee: Mazda Motor Corporation
    Inventors: Tatsuhiko Iwasaki, Shinya Kamada, Yasuhiro Ogauchi
  • Patent number: 9958055
    Abstract: An automatic transmission (1) includes first, second, and third planetary gear sets (10, 20, 30) and a lubricant feed passage (L2). The first and second planetary gear sets (10, 20) form a two-stage planetary gear set (40). The third planetary gear set (30) is adjacent to the two-stage planetary gear set on one axial side of the automatic transmission. The lubricant feed passage (L2) feeds a lubricant to a bearing (25) of the second planetary gear set located on an outer periphery of the two-stage planetary gear set (40). The lubricant feed passage feeds the lubricant from a first inlet (37e) to the bearing via a first oil passage (37f) and oil passages (26a, 26b, 26c) in a pinion shaft. The first inlet (37e) is formed on a side of a carrier body (37) opposite to the two-stage planetary gear set and on an inner periphery of the automatic transmission.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: May 1, 2018
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Tatsuhiko Iwasaki, Shinya Kamada
  • Patent number: 9933044
    Abstract: Disclosed herein is an automatic transmission (1) including first and second planetary gear sets (PL1) and (PL2). The first planetary gear set (PL1) has a first sun gear (S1) to which power from a power source (4) is input via an input shaft (3), and a first ring gear (R1) engaged with a first brake (B1). The second planetary gear set (PL2) has a second ring gear (R2) always engaged with a first carrier (C1), a second sun gear (S2) engaged with a second brake (B2), and a second carrier (C2) engaged with an output (output gear (7)). The automatic transmission is configured to engage the first and second brakes in a first gear to allow the power from the power source to be transmitted to the output via the input shaft and the first and second planetary gear sets.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: April 3, 2018
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Yasuhiro Ogauchi, Shinya Kamada, Tatsuhiko Iwasaki, Masaru Nakagishi
  • Patent number: 9903469
    Abstract: A hydraulic control circuit includes: a shift valve configured to be switched between a state of supplying oil pressure to a clearance adjusting chamber of an LR brake and a state of discharging the oil pressure from the clearance adjusting chamber of the LR brake; and a linear SV configured to control the oil pressure supplied to a pressing chamber of the LR brake. The hydraulic control circuit further includes a source pressure oil passage through which oil pressure equal to the oil pressure supplied from the shift valve to the clearance adjusting chamber is supplied to a source pressure port a of the linear SV. By discharging the oil pressure in the clearance adjusting chamber at the time of opening malfunction of the linear SV, the oil pressure in the pressing chamber is also discharged through a drain port of the shift valve.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: February 27, 2018
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Koshiro Saji, Shinya Kamada, Shotaro Nagai, Yasunari Nakayama, Masaru Nakagishi, Yasuo Shigenaka, Motomi Kobayashi