Patents by Inventor Takahiro Okano

Takahiro Okano 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: 20180208169
    Abstract: The hydraulic pressure generating device includes a regulator (spool valve) formed by a cylinder body, a spool which slidably moves within the cylinder body, a pilot chamber in which a pilot pressure which is a hydraulic pressure moving the spool along in an axial direction is inputted and an output chamber out of which an output pressure which is a hydraulic pressure corresponding to the pilot pressure is outputted, wherein the hydraulic pressure generating device further includes a spool position obtaining portion which obtains a relative position of the spool relative to the cylinder body and a pilot pressure controlling portion which controls the pilot pressure based on the relative position obtained by the spool position obtaining portion.
    Type: Application
    Filed: July 25, 2016
    Publication date: July 26, 2018
    Applicants: ADVICS CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki NINOYU, Takahiro OKANO, Yoshi MASUDA
  • Patent number: 10029665
    Abstract: A brake device for controlling an actual pressure of an output hydraulic pressure outputted from a pressure adjusting device and applying a braking force to a wheel of a vehicle based on the actual pressure of the output hydraulic pressure. The brake device includes an actual pressure judging portion configured to judge whether or not the actual pressure of the output hydraulic pressure is the pressure that is within the range of the dead zone and a adjusting portion configured to execute a target pressure adjustment for adjusting a target pressure of the output hydraulic pressure to approximate a side of the actual pressure of the output hydraulic pressure.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: July 24, 2018
    Assignees: ADVICS CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahiro Okano, Masaki Ninoyu, Kiyohito Takeuchi, Masaaki Komazawa, Yusuke Kamiya
  • Patent number: 10029662
    Abstract: A vehicle brake device includes a pressure adjusting device wherein as the volume of a pilot chamber is changed by the movement of a piston and the flow rate of liquid flowing in and out of the pilot chamber increases, the amount of movement of the piston increases with reference to the piston position in an equilibrium state where the force corresponding to the pilot pressure and the force corresponding to the output pressure are balanced, whereby the flow rate of the liquid flowing in and out of an output chamber increases. A control device, when judged by a limitation necessity judging portion that the gradient of output pressure should be limited, implements at least one of pressure increasing gradient limit control for opening a pressure decreasing electromagnetic valve under pressure increasing control, or pressure decreasing gradient limit control for opening a pressure increasing electromagnetic valve under pressure decreasing control.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: July 24, 2018
    Assignees: ADVICS CO., LTD, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki Ninoyu, Takahiro Okano, Yoshio Masuda, Daisuke Nakata
  • Publication number: 20180201245
    Abstract: A vehicle brake device provided with a hydraulic pressure generating portion, an actuator and a controlling portion which maintains a driving force of the driving portion when a control subject pressure in a control subject chamber is within a dead zone, wherein the control subject pressure varies in response to a variation of the master pressure and a pulsation is generated in the master pressure accompanying an operation of the actuator. The vehicle brake device further includes a rigidity information obtaining portion which obtains a rigidity information and a dead zone setting portion which sets the dead zone based on the rigidity information obtained by the rigidity information obtaining portion such that the higher the rigidity of the control subject chamber, or the higher the probability of rigidity increase of the control subject chamber, the wider the dead zone is set.
    Type: Application
    Filed: July 20, 2016
    Publication date: July 19, 2018
    Applicants: Advics Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Yusuke KAMIYA, Takahiro OKANO
  • Patent number: 9969379
    Abstract: A method for detecting fluid leakage from a pressure-decrease valve in a hydraulic brake system having an ABS device including: a shutoff valve for shutting off supply of a working fluid from a fluid-pressure supply source to a brake device provided for a wheel; the pressure-decrease valve for discharging the working fluid from the brake device; a reservoir for storing the working fluid discharged from the pressure-decrease valve; and a return pump for returning the working fluid stored in the reservoir to a portion between the shutoff valve and the fluid-pressure supply source, the method including the steps of: activating the return pump in a state in which the hydraulic brake system is not in ABS operation, and detecting the fluid leakage from the pressure-decrease valve based on a variation in a pressure of the working fluid in the fluid-pressure supply source caused when the return pump is activated.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: May 15, 2018
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, ADVICS CO., LTD.
    Inventors: Masaki Nanahara, Masayasu Ohkubo, Kazutaka Noro, Masaki Ninoyu, Takahiro Okano
  • Patent number: 9937911
    Abstract: A vehicle control device which is applicable to a vehicle brake device, controls the pressure increasing control valve and the pressure decreasing control valve so that an actual servo pressure detected by the servo pressure sensor becomes a target servo pressure and sets a control dead zone in which a control of the pressure increasing control valve and the pressure decreasing control valve is prohibited to be an area which has a first predetermined width from the target servo pressure when a normal braking operation is performed and sets the control dead zone to be an area which has a second predetermined width, wider than the first predetermined width when the brake actuator executes the braking control which accompanies a brake fluid pumping back control, wherein the brake fluid supplied to the wheel cylinder is returned to the master cylinder by pumping back operation of the built-in pump.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: April 10, 2018
    Assignees: ADVICS CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki Ninoyu, Takahiro Okano, Yusuke Kamiya, Daisuke Nakata, Masaaki Komazawa
  • Patent number: 9902385
    Abstract: A vehicular braking device can shorten the time between pilot pressure input to a regulator and generation of servo pressure, and reduce product-by-product time variations for servo pressure generation. This vehicular braking device comprises: a servo pressure rising start time measurement unit that measures, in advance, a servo pressure rising start time which is the time from pilot pressure input to a first pilot chamber by opening a pressure increase valve to when a servo pressure starts to rise, and stores the servo pressure rising start time in a storage unit; a pilot pressure increase time calculation unit that calculates a pilot pressure increase time based on the servo pressure rising start time stored in advance in the storage unit; and a pre-fill control unit that increases the pilot pressure for the pilot pressure increase time by opening the pressure increase valve when brake pedal operation is detected.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: February 27, 2018
    Assignee: ADVICS CO., LTD.
    Inventors: Takahiro Okano, Masaki Ninoyu
  • Publication number: 20180015914
    Abstract: A vehicle brake device includes a hydraulic pressure control portion which performs a feed-back control so that an actual hydraulic pressure of the brake fluid approximates an instruction target pressure and a target pressure setting portion which sets the instruction target pressure to a value closer to the actual hydraulic pressure side than an operating target pressure, when a pressure deviation between the operating target pressure which is a target value of the hydraulic pressure of the brake fluid corresponding to a brake operation and the actual hydraulic pressure is larger than a first pressure difference and at the same time when the actual hydraulic pressure is approaching to the operating target pressure.
    Type: Application
    Filed: January 15, 2016
    Publication date: January 18, 2018
    Applicants: ADVICS CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahiro OKANO, Masaki NINOYU
  • Patent number: 9802592
    Abstract: The brake control device comprises a control mode selecting portion 64 which selects one control mode based on a detection result of the detecting portion from a control mode group including at least two control modes which are a responsiveness priority mode which gives more priority to a responsiveness of the braking force relative to an operation of a brake operating member than to a suppression of an operating noise occurred upon the generation of the preparatory hydraulic pressure and a serenity priority mode which gives more priority to the suppression of the operating noise than to the responsiveness of the braking force. The hydraulic pressure control portion controls the hydraulic pressure generating device to generate the preparatory hydraulic pressure in response to the control mode selected by the control mode selecting portion.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: October 31, 2017
    Assignees: ADVICS CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahiro Okano, Daisuke Nakata, Yusuke Kamiya
  • Patent number: 9783170
    Abstract: The vehicle control apparatus gives a control current to the electromagnetic control valve at a start of energization of the electromagnetic control valve as a start current value smaller by a first determined amount than an open/closed state change-over reference current value which is necessary for changing over a state of the electromagnetic valve and after the start of energization of the electromagnetic control valve, the control current gradually increases with a smaller increase inclination than an increase inclination of an increase control of the control current which gives priority to a control responsibility of the electromagnetic control valve and finishes a gradual increase of the control current applying to the electromagnetic control valve, when the control current exceeds a finish current value which is larger than the open/closed state change-over reference current value.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: October 10, 2017
    Assignees: ADVICS CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki Ninoyu, Takahiro Okano, Daisuke Nakata, Yuusuke Kamiya, Masaaki Komazawa
  • Patent number: 9714017
    Abstract: The brake controller includes a friction brake device, a regeneration brake device, a required braking force calculating portion, a vehicle motion control portion which distributes the required braking force to the non-regeneration braking side right/left wheels that is either one of the right/left front wheels and right/left rear wheels, a maximum braking force calculating portion which calculates the maximum braking force at each wheel and a braking force control portion-which calculates the regeneration braking force generated at the regeneration braking side right/left wheels within a range where the regeneration braking force to be generated at the regeneration braking side right/left wheels does not exceed a smaller value of the maximum braking forces of the regeneration braking side right/left wheels, based on the required braking force and the distribution of the braking force to the non-regeneration braking side right/left wheels.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: July 25, 2017
    Assignees: ADVICS CO., LTD., TOYOTA JIDOSHI KABUSHIKI KAISHA
    Inventors: Takahiro Okano, Akitaka Nishio, Yusuke Kamiya, Masaaki Komazawa
  • Patent number: 9701288
    Abstract: A hydraulic brake system is configured such that a pressure of a working fluid from a high-pressure-source device is adjusted by electromagnetic pressure-increase and pressure-decrease linear valves and such that a brake device generates a braking force having a magnitude that depends on the pressure adjusted by the linear valves, wherein the following controls are selectively executable, as a control of the energizing currents supplied to the linear valves, a feedback control based on a difference between an actual braking-force index and a target braking-force index; and a feedforward control based on the target braking-force index executed by placing each valve in a valve equilibrium state, wherein, in the feedforward control, an energizing current is supplied to at least one of the two linear valves, the energizing current being larger than that according to a preset relationship between a braking-force index and an energizing current in the valve equilibrium state.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: July 11, 2017
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, ADVICS CO., LTD.
    Inventors: Takahiro Okano, Yusuke Kamiya, Kiyohito Takeuchi
  • Publication number: 20170182990
    Abstract: A vehicular brake device that implements ESC/TRC control suppresses hydraulic pressure variations produced during open/close control of a brake actuator holding valve or depressurizing valve. While a brake operating member is not operated and a wheel cylinder pressure supplying control is executed to supply target wheel cylinder pressure to respective wheel cylinders, the target servo pressure is set to a first predetermined target servo pressure smaller than a maximum output pressure of the servo pressure generating device. When wheel cylinder pressure supplying control starts, the target servo pressure is set as the target wheel cylinder maximum value when a firstly occurred rising inclination of the target wheel cylinder maximum value is equal to or more than a minimum increment of an output of the servo pressure generating device per unit time and at the same time when the target wheel cylinder pressure is below the first determined target servo pressure.
    Type: Application
    Filed: December 25, 2014
    Publication date: June 29, 2017
    Applicants: ADVICS CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki Ninoyu, Takahiro Okano, Yusuke Kamiya, Daisuke Nakata, Masaaki Komazawa
  • Patent number: 9688151
    Abstract: The vehicle brake device includes a hydraulic pressure brake device including a timing judging portion, a pressure increasing judging portion and a raising control portion for adding a raising amount of pressure selected and set from a first value relating to an allowable range, a second value relating to a response delay by filling a wheel cylinder with the operating fluid and a third value relating to a control delay relative to an electromagnetic valve which controls the hydraulic pressure braking force to the target pressure corresponding to a judgment result by the pressure increasing judging portion, when the timing judging portion judges that a time is the timing of raising.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: June 27, 2017
    Assignees: ADVICS CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahiro Okano, Masaki Ninoyu, Daisuke Nakata, Yusuke Kamiya
  • Patent number: 9663086
    Abstract: The vehicular brake device according to the present invention is provided with a first flow passage connecting a first electromagnetic valve and a wheel cylinder, a second flow passage connecting a reservoir portion capable of storing brake fluid and the first flow passage and a second electromagnetic valve disposed in the second flow passage. A pressure differential generating portion generates a predetermined pressure differential by moving a master piston by a drive pressure generating portion after an execution of an advancement control to advance the master piston so that the stroke position of the master piston is within an advanced side area. A second electromagnetic valve control portion places the second electromagnetic valve in an open state for a period including at least a portion of the period of time in an execution period of the advancement control.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: May 30, 2017
    Assignees: ADVICS CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshimitsu Ozeki, Hiroaki Niino, Takahiro Okano, Masaaki Komazawa, Kiyoyuki Uchida
  • Publication number: 20170120882
    Abstract: A vehicle brake device includes a pressure adjusting device wherein as the volume of a pilot chamber is changed by the movement of a piston and the flow rate of liquid flowing in and out of the pilot chamber increases, the amount of movement of the piston increases with reference to the piston position in an equilibrium state where the force corresponding to the pilot pressure and the force corresponding to the output pressure are balanced, whereby the flow rate of the liquid flowing in and out of an output chamber increases. A control device, when judged by a limitation necessity judging portion that the gradient of output pressure should be limited, implements at least one of pressure increasing gradient limit control for opening a pressure decreasing electromagnetic valve under pressure increasing control, or pressure decreasing gradient limit control for opening a pressure increasing electromagnetic valve under pressure decreasing control.
    Type: Application
    Filed: January 8, 2015
    Publication date: May 4, 2017
    Applicants: ADVICS CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki NINOYU, Takahiro OKANO, Yoshio MASUDA, Daisuke NAKATA
  • Patent number: 9566971
    Abstract: In a hydraulic brake system including a cylinder device that includes a front chamber and a rear chamber located on front and rear sides of a pressurizing piston, respectively, presence or absence of liquid leakage from a brake line is detected based on a hydraulic pressure in the rear chamber. Where a state in which a subtraction value obtained by subtracting an actual rear hydraulic pressure from a target rear hydraulic pressure is larger than a first malfunction determination threshold value has continued for a time not shorter than a first malfunction determination time, and then an increase of the actual rear hydraulic pressure at a rate not lower than a set rate has caused the subtraction value to become smaller than a return determination threshold value, it is determined that the pressurizing piston has been bottomed due to liquid leakage from the front chamber.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: February 14, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahiro Okano, Yusuke Kamiya, Kiyoyuki Uchida, Akira Sakai, Hiroshi Ueno, Masaaki Uechi
  • Publication number: 20170036658
    Abstract: A vehicular braking device can shorten the time between pilot pressure input to a regulator and generation of servo pressure, and reduce product-by-product time variations for servo pressure generation. This vehicular braking device comprises: a servo pressure rising start time measurement unit that measures, in advance, a servo pressure rising start time which is the time from pilot pressure input to a first pilot chamber by opening a pressure increase valve to when a servo pressure starts to rise, and stores the servo pressure rising start time in a storage unit; a pilot pressure increase time calculation unit that calculates a pilot pressure increase time based on the servo pressure rising start time stored in advance in the storage unit; and a pre-fill control unit that increases the pilot pressure for the pilot pressure increase time by opening the pressure increase valve when brake pedal operation is detected.
    Type: Application
    Filed: November 28, 2014
    Publication date: February 9, 2017
    Applicant: ADVICS CO., LTD.
    Inventors: Takahiro Okano, Masaki Ninoyu
  • Publication number: 20160355168
    Abstract: A vehicle control device which is applicable to a vehicle brake device, controls the pressure increasing control valve and the pressure-decreasing control valve so that an actual servo pressure detected by the servo pressure sensor becomes a target servo pressure; and controls so as to increase the target servo pressure by a predetermined amount, while the brake actuator is executing the braking control which accompanies a brake fluid pumping back control wherein the brake fluid supplied to the wheel cylinder is pumped back to the master cylinder by the built-in pump.
    Type: Application
    Filed: December 25, 2014
    Publication date: December 8, 2016
    Applicants: ADVICS CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki NINOYU, Takahiro OKANO, Yusuke KAMIYA, Daisuke NAKATA, Masaaki KOMAZAWA
  • Patent number: 9511758
    Abstract: A hydraulic brake system includes: a brake hydraulic-pressure control device capable of controlling a hydraulic pressure in a brake cylinder of a hydraulic brake configured to reduce a rotation of a wheel, the brake hydraulic-pressure control device including (i) a piston, (ii) a hydraulic-pressure chamber provided opposite the piston, and (iii) a moving-force control device configured to apply a moving force to the piston and capable of controlling the moving force; and an air reducing device configured to control the moving-force control device to move the piston to reduce air in an air reduction target portion including the hydraulic-pressure chamber.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: December 6, 2016
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, ADVICS CO., LTD.
    Inventors: Daisuke Nakata, Yusuke Kamiya, Takahiro Okano, Yoshio Masuda, Yosuke Yamasoe