Patents by Inventor Yuya Tachibanada

Yuya Tachibanada 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: 20210300320
    Abstract: A hybrid vehicle control apparatus including a torque converter temperature detector detecting a torque converter temperature, a rotor temperature detector detecting a rotor temperature, a stator temperature detector detecting a stator temperature, and an electronic control unit including a microprocessor. The microprocessor is configured to perform controlling an engine, a transmission, a lockup clutch, a motor-generator and a stator cooling device based on the torque converter temperature detected by the torque converter temperature detector, the rotor temperature detected by the rotor temperature detector and the stator temperature detected by the stator temperature detector so that the torque converter temperature is equal to or lower than a first predetermined temperature, the rotor temperature is equal to or lower than a second predetermined temperature and the stator temperature is equal to or lower than a third predetermined temperature.
    Type: Application
    Filed: March 18, 2021
    Publication date: September 30, 2021
    Inventors: Yuya Tachibanada, Yutaka Ishikawa, Shintaro Kameda
  • Publication number: 20210215247
    Abstract: The disclosure provides a control device of an automatic transmission for vehicle, which can improve the responsiveness to switching to a reverse stage. The automatic transmission includes: planetary gear mechanisms which transmit the driving force input to an input shaft to an output member; and first to third clutches and first to fourth brakes as engagement mechanisms capable of establishing shift stages by switching a transmission path of the driving force in the planetary gear mechanisms. The control device executes a reverse preparation process for starting engagements of the first and third clutches and the third brake and stopping rotation of the input shaft when the reverse stage is selected when the fourth brake (mechanical engagement mechanism) is in a unidirectional rotation allowed state (first state) and the vehicle is traveling at a vehicle speed greater than a highest vehicle speed at which the reverse stage is establishable.
    Type: Application
    Filed: January 14, 2021
    Publication date: July 15, 2021
    Applicant: Honda Motor Co., Ltd.
    Inventors: Yuya TACHIBANADA, Kazuma SASAHARA, Makoto KOBAYASHI
  • Patent number: 10823261
    Abstract: There is provided an automatic transmission capable of preventing deterioration of driving performance even when an engagement mechanism is not switched due to a failure. An automatic transmission includes a first brake which is always in a fixed state from a first forward gear stage to a predetermined gear stage and is in an open state at a gear stage with a higher speed than the predetermined gear stage, and a hydraulic sensor configured to detect whether the first brake is switched to the fixed state. When a transmission control device instructs the first brake to switch to the fixed state, and it is confirmed that the first brake is in an open state, the transmission control device instructs engagement mechanisms other than the first brake to perform switching so that a preliminary gear stage is able to be set.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: November 3, 2020
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuya Tachibanada, Soichi Sugino, Yutaka Ishikawa, Shunsuke Yoshida
  • Patent number: 10780886
    Abstract: Provided is a hydraulic pressure control device. A hydraulic pressure control device includes a solenoid valve configured to supply hydraulic pressure to switch between an engaged state and a released state of a lock-up clutch, and a transmission control device configured to control the solenoid valve. The solenoid valve supplies hydraulic pressure to switch between a parking locked state and a parking released state of a parking lock mechanism, in addition to switching of the lock-up clutch.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: September 22, 2020
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuya Tachibanada, Yutaka Ishikawa, Shunsuke Yoshida, Tomoaki Mukai
  • Patent number: 10724608
    Abstract: There is provided a transmission control device capable to switching a switching mechanism quickly. A transmission control device ECU controls an automatic transmission (3) and can receive information about a slope from a front and rear G sensor. The automatic transmission (3) includes a two-way clutch (F1) as a switching mechanism that is switchable between a reverse rotation prevention state in which forward rotation of a rotatable carrier (Cb) (eleventh element) is allowed and reverse rotation is prevented and a fixed state in which rotation of the element is prevented. When the range is switched to a parking range and a vehicle is not stopped on a slope, the transmission control device ECU switches the two-way clutch (F1) to the fixed state.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: July 28, 2020
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yutaka Ishikawa, Yuya Tachibanada
  • Patent number: 10703349
    Abstract: One solenoid valve included in a hydraulic pressure control device has at least two functions among the following (1) to (6) functions, (1) switching a state of a two-way clutch, (2) switching a state of a parking lock mechanism, (3) switching the supply of hydraulic pressure to a first brake that is put into an engaged state when a gear stage selected when driving of a vehicle starts is set, (4) controlling a line pressure adjustment valve so that a decrease in a line pressure is prevented when the temperature of a hydraulic fluid is a first predetermined temperature or higher, (5) preventing the occurrence of a creep phenomenon in a neutral range when the temperature of the hydraulic fluid is a second predetermined temperature or lower, and (6) boosting a line pressure by performing switching to another linear solenoid valve when the line pressure adjustment valve has failed.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: July 7, 2020
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuya Tachibanada, Yutaka Ishikawa
  • Publication number: 20200149631
    Abstract: When hydraulic information is not available for use, a lock mechanism control unit of a transmission's rotating shaft operated by hydraulic pressure sets the shift range to a non-running range and sets a parking lock to an unlocked state if a vehicle is in a running state and rotation speed of a drive unit is equal to or higher than a predetermined value, but sets the shift range to a parking range and sets the parking lock to a locked state if the vehicle is in a non-running state or the rotation speed is lower than the predetermined value.
    Type: Application
    Filed: October 28, 2019
    Publication date: May 14, 2020
    Inventors: Yuya Tachibanada, Kazuma Sasahara, Tetsuya Mochizuki, Koichi Fushimi, Hirotake Omoto, Shunsuke Yoshida
  • Patent number: 10641393
    Abstract: An automatic transmission for improving responsiveness until reverse movement is possible. When the range is switched from a parking range to a reverse range, P lock release control for releasing a parking state starts. When a two-way clutch is in a reverse rotation prevention state, hydraulic pressure is supplied to a first clutch, a third clutch, and a third brake, and a process in a reverse side preparation mode starts. When the first clutch is in a connected state and a rotational speed of an input shaft is a predetermined rotational speed, whether a parking piston of a parking lock mechanism is at an unlock position is determined. When it is at the unlock position, a driving source is requested to restrict an output torque. Then, hydraulic pressure is supplied to the two-way clutch, and the two-way clutch is switched from a reverse rotation prevention state to a fixed state.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: May 5, 2020
    Assignee: Honda Motor Co., Ltd.
    Inventors: Ryohei Yamagishi, Yuya Tachibanada
  • Patent number: 10626983
    Abstract: Provided is an automatic transmission capable of smoothly switching a switching mechanism. A control part ECU of a transmission recognizes an input torque and a friction torque when an instruction to switch a two-way clutch from a fixed state to a reverse rotation prevention state is received while a first clutch, a second clutch and a third clutch are in an open state, and switches the two-way clutch from the fixed state to the reverse rotation prevention state when the input torque is equal to or greater than the friction torque.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: April 21, 2020
    Assignee: Honda Motor Co., Ltd.
    Inventors: Ryohei Yamagishi, Yuya Tachibanada, Yutaka Ishikawa
  • Patent number: 10563735
    Abstract: There is provided an automatic transmission capable to preventing an output of a driving source in a neutral range from being transmitted to wheels without increasing the number of control valves which could fail. An automatic transmission includes a first brake, a third clutch, a third brake, a transmission control device configured to control the first brake, the third clutch, and the third brake, and a hydraulic sensor and a hydraulic switch configured to determine whether the first brake is under control of the transmission control device. When the hydraulic sensor and the hydraulic switch detect that the first brake is in an engaged state contrary to control of the transmission control device in a non-traveling range, the transmission control device switches the third clutch and the third brake to the engaged state.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: February 18, 2020
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuya Tachibanada, Yutaka Ishikawa, Sadahito Kajihara
  • Patent number: 10563679
    Abstract: Provided is a hydraulic pressure control device. A hydraulic pressure control device supplies hydraulic pressure to a piston using solenoid valves and performs 2:1 switching processing of stopping the supply of hydraulic pressure to the piston using a solenoid valve when the piston is switched to a parking locked state. When the piston is not switched to a side that is to be a parking locked state, hydraulic pressure is supplied to two solenoid valves, and 2:0 switching processing of stopping the supply of hydraulic pressure to the piston by solenoid valves is performed. Then, a reporting processing of reporting that at least one of the solenoid valves has failed is performed.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: February 18, 2020
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuya Tachibanada, Yutaka Ishikawa, Yusuke Yoshimura
  • Patent number: 10557545
    Abstract: A control apparatus of an automatic transmission, which includes a mechanical engaging mechanism functioning as a brake, includes a determination unit determining, when a selected gear is a lowest forward speed gear, and the mechanism is in a second state, whether to switch the mechanism to the first state, and a switching processing unit switching the mechanism to the first state based on a determination result. In the first state, only rotation of a predetermined rotational element provided in planetary gear mechanisms in a first direction is restricted. In the second state, rotation of the predetermined rotational element in both the first and second direction is restricted. The determination unit determines to switch the mechanism to the first state at least on condition that a driving force is larger than a predetermined driving force.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: February 11, 2020
    Assignee: HONDA MOTOR CO., LTD
    Inventors: Yuya Tachibanada, Yutaka Ishikawa, Tetsuya Mochizuki, Koichi Fushimi, Masaya Tamai, Ryohei Yamagishi
  • Patent number: 10527113
    Abstract: A hydraulic circuit device for a vehicle, includes a clutch, a flow path, a fluid pump, a pressure generating device, and a control valve. The control valve is configured to determine whether a transmission start-stop function activation condition other than a vehicle speed is satisfied, determine whether a system start-stop function activation condition related to a component of the vehicle is satisfied, the component being other than the transmission, determine whether the vehicle speed is equal to or lower than a first speed threshold, and boost a line pressure of the flow path to accumulate pressure in the pressure generating device for preparing activation of the start-stop function if it is determined that the transmission start-stop function activation condition and the system start-stop function activation condition are satisfied, and if it is determined that the vehicle speed is equal to or lower than the first speed threshold.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: January 7, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Yuya Tachibanada
  • Patent number: 10415703
    Abstract: A control apparatus for controlling an automatic transmission including a torque converter to which a driving force of an engine is input includes a specifying unit configured to specify a drag torque of a wet friction type lock-up clutch, and a transmission unit configured to transmit load information including at least the drag torque specified by the specifying unit to a control apparatus of the engine. The specifying unit specifies the drag torque of the lock-up clutch during in-gear based on a slip ratio of the torque converter before in-gear when the lock-up clutch is released.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: September 17, 2019
    Assignee: HONDA MOTOR CO., LTD
    Inventor: Yuya Tachibanada
  • Patent number: 10408346
    Abstract: A parking lock apparatus includes an engaging mechanism, a slider, a hydraulic circuit, and a processor. The engaging mechanism is to prevent a rotation of a rotating body when the engaging mechanism is in a mechanical engagement state. The slider is to switch a state of the engaging mechanism between the mechanical engagement state and a mechanical disengagement state in accordance with a position of the slider. The hydraulic circuit is to change the position of the slider. The processor is configured to increase line pressure in the hydraulic circuit when the engaging mechanism is in the mechanical engagement state.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: September 10, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Yutaka Ishikawa, Yuya Tachibanada, Tetsuya Mochizuki, Shunsuke Yoshida
  • Patent number: 10371253
    Abstract: A power transmission includes a first brake, a pressure regulating valve, an accumulator, an oil temperature sensor, a second electromagnetic valve allowing supply of working oil to a piston, and a power transmission control device. The power transmission control device includes a memory relating and storing a working oil temperature and a permission time configured to allow release of the accumulator, and a receiver unit receiving a starting request. The accumulator is connected such that the working oil, in which the pressure is accumulated, can be supplied to the first brake and the piston. The power transmission control device sets a permission time corresponding to a temperature of the working oil on the basis of the memory. The working oil, in which the pressure is accumulated, is supplied to the first brake only during the permission time when restart information is received, while a vehicle performs idling stop control.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: August 6, 2019
    Assignee: Honda Motor Co.,Ltd.
    Inventors: Yuya Tachibanada, Yutaka Ishikawa
  • Patent number: 10344852
    Abstract: A control apparatus configured to control an automatic transmission to which a driving force of an engine is input includes a detection unit provided in the automatic transmission, and a processing unit configured to generate load information concerning a load on the automatic transmission based on the detection result of the detection unit and transmit the load information to the control apparatus of the engine. The processing unit transmits dummy information that is not based on the detection result of the detection unit as the load information at least on condition that the automatic transmission is in an operation state in which a load on an input shaft is released.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: July 9, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Yuya Tachibanada, Masaya Agata
  • Patent number: 10281011
    Abstract: Provided is an automatic transmission with which a switching mechanism thereof is hardly damaged even if the hydraulic pressure supplied to a hydraulic pressure control circuit temporarily changes. A control part ECU of the automatic transmission TM switches the first brake B1 to the reverse rotation preventing state when a signal indicating that the slider is at a position corresponding to the reverse rotation preventing state is received while the control unit ECU recognized that it has switched the first brake B1 to the fixed state.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: May 7, 2019
    Assignee: Honda Motor Co., Ltd.
    Inventor: Yuya Tachibanada
  • Patent number: 10267416
    Abstract: A control apparatus of an automatic transmission connected to an internal combustion engine of a vehicle includes a determination unit configured to determine an operation state of a hydraulic oil temperature sensor based on comparison between a threshold and a difference between a hydraulic oil temperature of the automatic transmission and a cooling water temperature of the internal combustion engine. When the operation state of the hydraulic oil temperature sensor is determined as normal by the comparison with the threshold, the determination unit further determines the operation state of the hydraulic oil temperature sensor based on an operation state of an oil pressure sensor determined using the hydraulic oil temperature, an oil pressure of hydraulic oil, and a rotation speed.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: April 23, 2019
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yutaka Ishikawa, Yuya Tachibanada
  • Patent number: 10234026
    Abstract: An automatic transmission capable of properly judging faults of a switching mechanism is provided. A control part ECU of the automatic transmission TM has an actual change gear ratio calculating part 10 and a fault judging part 11. Under a condition that the control part ECU has recognized that the first brake device B1 is switched to a reverse rotation preventing state, if the actual change gear ratio is kept to be an actual change gear ratio prior to a reduction of a rotational speed of a drive source ENG when the rotational speed of the drive source ENG is reduced, then the fault judging part 11 judges that a first brake B1 has a fault.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: March 19, 2019
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuya Tachibanada, Yutaka Ishikawa