Patents by Inventor Shusaku Katakura

Shusaku Katakura 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: 10837547
    Abstract: An oil pressure control device has a mechanical oil pump (O/P) driven by a motor/generator (MG), an electric oil pump (M/O/P) driven by a sub motor (S/M) and a line pressure regulating valve (104). In a case where a state is changed from a state in which the motor/generator (MG) is stopped and the electric oil pump (M/O/P) is driven to a state in which the motor/generator (MG) is started and the electric oil pump (M/O/P) is stopped, when a total flow amount of a working fluid discharge flow amount of the mechanical oil pump (O/P) and a working fluid discharge flow amount of the electric oil pump (M/O/P) is equal to or greater than a pressure regulation limit flow amount of the pressure regulating valve (104), the working fluid discharge flow amount of the electric oil pump (M/O/P) is decreased.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: November 17, 2020
    Assignee: JATCO LTD
    Inventors: Yutaka Shimizu, Shusaku Katakura, Yusuke Ota, Tomoyuki Koike, Yukiyoshi Inuta, Youko Yoshioka
  • Patent number: 10697452
    Abstract: An oil pressure control device for a vehicle is configured such that, when switching from an oil pressure supply by means of a mechanical oil pump driven by a motor/generator to an oil pressure supply by means of an electric oil pump driven by a sub-motor, a supply ratio of oil supplied from the mechanical oil pump and a supply ratio of oil supplied from the electric oil pump, are adjusted based on an oil pressure difference between a first oil pressure and a second oil pressure, via first and second flapper valves. When the first oil pressure becomes less than or equal to a pump drive threshold, an increase in the second oil pressure is initiated, and the first oil pressure and the second oil pressure are made to match at a predetermined equilibrium oil pressure higher than a required line pressure.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: June 30, 2020
    Assignee: JATCO LTD
    Inventors: Yutaka Shimizu, Shusaku Katakura, Yusuke Ota, Youko Yoshioka, Yukiyoshi Inuta, Tomoyuki Koike
  • Patent number: 10576965
    Abstract: A vehicle is provided with a mechanical oil pump (O/P) that is driven by a motor/generator (MG), an electric oil pump (M/O/P) that is driven by a sub-motor (S/M) and a second clutch (CL2) that transmits the drive force of the motor/generator (MG) to left and right drive wheels (LT, RT). When an accelerator pedal is depressed while a brake pedal is still depressed, an integrated controller (10) drives the electric oil pump (M/O/P) before the brake pedal is released, and oil pressure supplied to the second clutch (CL2) is increased.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: March 3, 2020
    Assignee: JATCO LTD
    Inventors: Shusaku Katakura, Yutaka Shimizu, Tomoyuki Koike, Yukiyoshi Inuta, Youko Yoshioka
  • Publication number: 20200047766
    Abstract: A vehicle control device includes a travel environment recognition device configured to recognize travel environment, a vehicle travel state detection device, and an autonomous/manual driving mode controller. The autonomous/manual driving mode controller includes a learning correction unit configured to store at least one of a plurality of control parameters indicating the vehicle travel state by operation of the driver in the autonomous driving mode, and to correct the control parameter in the autonomous driving mode according to the stored control parameter. When the stored control parameter is the control parameter changed by an operation by the driver midway in passing or after passing, the learning correction unit is configured to correct the control parameter in the autonomous driving mode so that an acceleration level or the deceleration level is increased midway in passing or after passing.
    Type: Application
    Filed: January 15, 2018
    Publication date: February 13, 2020
    Inventors: To KO, Shusaku KATAKURA, Yukifumi OOTSUKA
  • Patent number: 10309528
    Abstract: The present invention is configured such that: in a stopped state of an electric oil pump (M/O/P), control of the electric oil pump (M/O/P) is started such that, when a driver has the intention of demanding drive force, a discharge pressure takes on a target hydraulic pressure (PTh) determined in accordance with the demanded drive force from the driver; and a pressure regulation target value of a line pressure regulation valve (101) is set to a value that is higher than or equal to the target hydraulic pressure (PTh). Thus, it is possible to provide a vehicular hydraulic control device capable of suppressing hunting in line pressure (PL) when the line pressure (PL) is regulated so as to take on the target hydraulic pressure (PTh).
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: June 4, 2019
    Assignee: JATCO LTD
    Inventors: Shusaku Katakura, Yutaka Shimizu, Yusuke Ota, Keiichi Nakao, Shintaro Ohshio, Hirotaka Suzuki
  • Patent number: 10309526
    Abstract: A hydraulic control device includes: a mechanical oil pump (O/P) that is driven by a motor/generator (M/G) and that generates a first hydraulic pressure (P1); an electric oil pump (M/O/P) that is driven by a sub-motor (S/M) and that generates a second hydraulic pressure (P2); and a controller (10). When a demanded drive force from a driver is generated while in a low-vehicle-speed region which is lower than a first vehicle speed (V1) at which the output of the mechanical oil pump (O/P) becomes unstable, the controller (10) controls the electric oil pump (M/O/P) such that the second hydraulic pressure (P2) becomes larger than a compensative hydraulic pressure (P?) found by subtracting the first hydraulic pressure (P1) from a necessary hydraulic pressure (Pne) determined in accordance with the demanded drive force.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: June 4, 2019
    Assignee: JATCO LTD
    Inventors: Shusaku Katakura, Yutaka Shimizu, Youko Yoshioka, Yukiyoshi Inuta, Tomoyuki Koike
  • Publication number: 20180119800
    Abstract: An oil pressure control device has a mechanical oil pump (O/P) driven by a motor/generator (MG), an electric oil pump (M/O/P) driven by a sub motor (S/M) and a line pressure regulating valve (104). In a case where a state is changed from a state in which the motor/generator (MG) is stopped and the electric oil pump (M/O/P) is driven to a state in which the motor/generator (MG) is started and the electric oil pump (M/O/P) is stopped, when a total flow amount of a working fluid discharge flow amount of the mechanical oil pump (O/P) and a working fluid discharge flow amount of the electric oil pump (M/O/P) is equal to or greater than a pressure regulation limit flow amount of the pressure regulating valve (104), the working fluid discharge flow amount of the electric oil pump (M/O/P) is decreased.
    Type: Application
    Filed: March 9, 2016
    Publication date: May 3, 2018
    Applicant: JATCO Ltd
    Inventors: Yutaka SHIMIZU, Shusaku KATAKURA, Yusuke OTA, Tomoyuki KOIKE, Yukiyoshi INUTA, Youko YOSHIOKA
  • Publication number: 20180105162
    Abstract: A vehicle is provided with a mechanical oil pump (O/P) that is driven by a motor/generator (MG), an electric oil pump (M/O/P) that is driven by a sub-motor (S/M) and a second clutch (CL2) that transmits the drive force of the motor/generator (MG) to left and right drive wheels (LT, RT). When an accelerator pedal is depressed while a brake pedal is still depressed, an integrated controller (10) drives the electric oil pump (M/O/P) before the brake pedal is released, and oil pressure supplied to the second clutch (CL2) is increased.
    Type: Application
    Filed: March 9, 2016
    Publication date: April 19, 2018
    Applicant: JATCO Ltd
    Inventors: Shusaku KATAKURA, Yutaka SHIMIZU, Tomoyuki KOIKE, Yukiyoshi INUTA, Youko YOSHIOKA
  • Publication number: 20180106363
    Abstract: A hydraulic control device includes: a mechanical oil pump (O/P) that is driven by a motor/generator (M/G) and that generates a first hydraulic pressure (P1); an electric oil pump (M/O/P) that is driven by a sub-motor (S/M) and that generates a second hydraulic pressure (P2); and a controller (10). When a demanded drive force from a driver is generated while in a low-vehicle-speed region which is lower than a first vehicle speed (V1) at which the output of the mechanical oil pump (O/P) becomes unstable, the controller (10) controls the electric oil pump (M/O/P) such that the second hydraulic pressure (P2) becomes larger than a compensative hydraulic pressure (P?) found by subtracting the first hydraulic pressure (P1) from a necessary hydraulic pressure (Pne) determined in accordance with the demanded drive force.
    Type: Application
    Filed: March 9, 2016
    Publication date: April 19, 2018
    Applicant: JATCO Ltd
    Inventors: Shusaku KATAKURA, Yutaka SHIMIZU, Youko YOSHIOKA, Yukiyoshi INUTA, Tomoyuki KOIKE
  • Publication number: 20180100578
    Abstract: An oil pressure control device for a vehicle is configured such that, when switching from an oil pressure supply by means of a mechanical oil pump driven by a motor/generator to an oil pressure supply by means of an electric oil pump driven by a sub-motor, a supply ratio of oil supplied from the mechanical oil pump and a supply ratio of oil supplied from the electric oil pump, are adjusted based on an oil pressure difference between a first oil pressure and a second oil pressure, via first and second flapper valves. When the first oil pressure becomes less than or equal to a pump drive threshold, an increase in the second oil pressure is initiated, and the first oil pressure and the second oil pressure are made to match at a predetermined equilibrium oil pressure higher than a required line pressure.
    Type: Application
    Filed: March 9, 2016
    Publication date: April 12, 2018
    Applicant: JATCO Ltd
    Inventors: Yutaka SHIMIZU, Shusaku KATAKURA, Yusuke OTA, Youko YOSHIOKA, Yukiyoshi INUTA, Tomoyuki KOIKE
  • Publication number: 20180094722
    Abstract: The present invention is configured such that: in a stopped state of an electric oil pump (M/O/P), control of the electric oil pump (M/O/P) is started such that, when a driver has the intention of demanding drive force, a discharge pressure takes on a target hydraulic pressure (PTh) determined in accordance with the demanded drive force from the driver; and a pressure regulation target value of a line pressure regulation valve (101) is set to a value that is higher than or equal to the target hydraulic pressure (PTh). Thus, it is possible to provide a vehicular hydraulic control device capable of suppressing hunting in line pressure (PL) when the line pressure (PL) is regulated so as to take on the target hydraulic pressure (PTh).
    Type: Application
    Filed: March 9, 2016
    Publication date: April 5, 2018
    Applicant: JATCO Ltd
    Inventors: Shusaku KATAKURA, Yutaka SHIMIZU, Yusuke OTA, Keiichi NAKAO, Shintaro OHSHIO, Hirotaka SUZUKI
  • Patent number: 9056612
    Abstract: A driving force control device for a hybrid vehicle includes: a travel load calculation unit adapted to divide a predicted route from a current position to a predetermined distance ahead into a plurality of intervals, and to estimate a travel load in each interval; a recommended discharge amount calculation unit adapted to search for a regeneration possible interval, in which a travel condition required by a driver can be maintained even when an output of an internal combustion engine is stopped and regeneration is performed by a motor/generator, from an estimation result, and to estimate a charge amount expected value in the regeneration possible interval, and distributes the charge amount expected value preferentially to an adjacent interval to the regeneration possible interval as a recommended discharge amount in order to stop the output of the internal combustion engine; and an energy management unit that controls an operation of the motor/generator in the current position on the basis of a travel condit
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: June 16, 2015
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Shusaku Katakura, Takamitsu Hase, Yoshinori Yamamoto, Kohei Kamiya, Daigo Kishi, Kenichiro Murakami
  • Publication number: 20150057860
    Abstract: A driving force control device for a hybrid vehicle includes: a travel load calculation unit adapted to divide a predicted route from a current position to a predetermined distance ahead into a plurality of intervals, and to estimate a travel load in each interval; a recommended discharge amount calculation unit adapted to search for a regeneration possible interval, in which a travel condition required by a driver can be maintained even when an output of an internal combustion engine is stopped and regeneration is performed by a motor/generator, from an estimation result, and to estimate a charge amount expected value in the regeneration possible interval, and distributes the charge amount expected value preferentially to an adjacent interval to the regeneration possible interval as a recommended discharge amount in order to stop the output of the internal combustion engine; and an energy management unit that controls an operation of the motor/generator in the current position on the basis of a travel condit
    Type: Application
    Filed: March 13, 2013
    Publication date: February 26, 2015
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Shusaku Katakura, Takamitsu Hase, Yoshinori Yamamoto, Kohei Kamiya, Daigo Kishi, Kenichiro Murakami
  • Patent number: 8798870
    Abstract: A regeneration control device for vehicle including a generator for generating power by being driven by an engine and configured to convert kinetic energy of a vehicle into electrical energy by the generator includes a generated voltage control unit configured to variably control a generated voltage of the generator, a road traffic environment detection unit configured to detect a road traffic environment, a recommended deceleration calculation unit configured to calculate a recommended deceleration during coasting depending on the road traffic environment, and a regeneration control unit configured to convert the kinetic energy of the vehicle into the electrical energy by increasing the generated voltage of the generator as the recommended deceleration increases.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: August 5, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kohei Kamiya, Shusaku Katakura, Kenichiro Murakami
  • Publication number: 20130289830
    Abstract: A regeneration control device for vehicle including a generator for generating power by being driven by an engine and configured to convert kinetic energy of a vehicle into electrical energy by the generator includes a generated voltage control unit configured to variably control a generated voltage of the generator, a road traffic environment detection unit configured to detect a road traffic environment, a recommended deceleration calculation unit configured to calculate a recommended deceleration during coasting depending on the road traffic environment, and a regeneration control unit configured to convert the kinetic energy of the vehicle into the electrical energy by increasing the generated voltage of the generator as the recommended deceleration increases.
    Type: Application
    Filed: December 26, 2011
    Publication date: October 31, 2013
    Inventors: Kohei Kamiya, Shusaku Katakura, Kenichiro Murakami
  • Patent number: 8216110
    Abstract: A shifting control system has two gear shift stage groups, two clutches, a clutch release detection section, a pre-shift controller, a clutch oil level detection section and a pre-shift inhibiting section. The clutches are alternately engaged to selectively transmit power from an engine to a wheel. The clutch release detection section detects a release-side clutch which corresponds to the clutch that is in a released state. The pre-shift controller operates a meshing mechanism of the gear shift stage group corresponding to the release-side clutch, so as to undergo pre-shifting when the other clutch is engaged as an engage-side clutch. The clutch oil level detection section determines whether an oil level in the release-side clutch is equal to or greater than a preset oil level. The pre-shift inhibiting section inhibits pre-shifting while the oil level in the release-side clutch is equal to or greater than a preset oil level.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: July 10, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Shusaku Katakura, Sadamu Fujiwara
  • Patent number: 8202199
    Abstract: A rapid acceleration control apparatus has a rapid acceleration prime mover rotational speed control section and a rapid acceleration start clutch capacity control section. The rapid acceleration prime mover rotational speed control section executes a rapid acceleration start prime mover rotational speed control that control a rotational speed of the prime mover to a target rotational speed required to achieve the rapid acceleration start when a rapid acceleration start condition exists in which both an accelerator and a brake are simultaneously operated while the vehicle is stopped. The rapid acceleration start clutch capacity control section executes a rapid acceleration start clutch capacity control that decreases a connection capacity of the clutch during the rapid acceleration start prime mover rotational speed control executed by the rapid acceleration prime mover rotational speed control section to suppress heating of the clutch due to the rapid acceleration start primer mover rotational speed control.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: June 19, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Shusaku Katakura, Kazuhiro Taniai, Masami Murayama, Yoshinobu Kawamoto, Youhei Mizuta
  • Patent number: 7962267
    Abstract: A control apparatus for an automatic transmission includes a target-value setting section configured to set a target rotational-speed difference between input and output rotational speeds of at least one of first and second friction-engagement elements; a total torque-capacity calculating section configured to calculate a total torque capacity of the first and second friction-engagement elements by adding a transmission input torque to a correction value calculated from a deviation between the target rotational-speed difference and an actual rotational-speed difference; a distribution-ratio setting section configured to set a distribution ratio; an individual torque-capacity calculating section configured to calculate individual torque capacities of both second friction-engagement elements on the basis of the total torque capacity and the distribution ratio; and an engagement control section configured to control engagement states of the both friction-engagement elements in accordance with the individual torq
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: June 14, 2011
    Assignee: Jatco Ltd
    Inventors: Tomoaki Honma, Masaaki Uchida, Shusaku Katakura, Yoshinobu Kawamoto, Sadamu Fujiwara
  • Patent number: 7912614
    Abstract: An automatic transmission control apparatus is provided with a control scheme that focuses on the rotational speed differences of the frictional engaging elements and the distribution of torque transferred by the frictional engaging elements. When the automatic transmission is upshifted while in a power-off state, the individual torque capacity of a frictional engaging element being released and the individual torque capacity of a frictional engaging element being connected are corrected by adding a prescribed torque capacity amount to each of the individual torque capacities during an inertia phase of the shift control in which a compensation is executed for inertia related to changing the gear ratio. In this way, frictional losses are induced in the frictional engaging elements so as to absorb the inertia torque and lower the input rotational speed more quickly.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: March 22, 2011
    Assignee: Jatco Ltd
    Inventors: Tomoaki Honma, Masaaki Uchida, Shusaku Katakura, Yoshinobu Kawamoto, Sadamu Fujiwara
  • Patent number: 7840329
    Abstract: An automatic transmission includes at least an input section, an output section, first and second frictional engagement elements, and a controller. The input section receives an input torque from a drive unit. The first frictional engagement element has an engaged state allowing the output section to rotate at a first transmission gear ratio with respect to the input section. The second frictional engagement element has an engaged state allowing the output section to rotate at a second transmission gear ratio with respect to the input section. The controller controls at least a gear shift from the first transmission gear ratio to the second transmission gear ratio. The controller controls the first and second frictional engagement elements and the drive unit so as to cancel an inertia torque resulting from the gear shift.
    Type: Grant
    Filed: July 12, 2007
    Date of Patent: November 23, 2010
    Assignee: Jatco Ltd
    Inventors: Shusaku Katakura, Masaaki Uchida, Yoshinobu Kawamoto, Tomoaki Honma, Sadamu Fujiwara