Patents Assigned to Advics Co., Ltd.
  • Patent number: 11912256
    Abstract: To suppress a sharp variation in the posture of a vehicle in a control apparatus that is configured to control the posture of the vehicle by adjusting a distribution ratio of a braking force between the front and rear during braking of the vehicle. The control apparatus includes a distribution setting unit that is configured to change the braking force distribution ratio from a basic braking force ratio during braking of the vehicle so that a posture of the vehicle follows a posture indicated by the target posture value. If the target posture value is varied when the braking force distribution ratio is different from the basic braking force ratio, the distribution setting unit sets the amount of change, by which the braking force distribution ratio is changed per unit time, equal to or smaller than a restriction amount.
    Type: Grant
    Filed: November 19, 2021
    Date of Patent: February 27, 2024
    Assignee: ADVICS CO., LTD.
    Inventors: Sotaro Muramatsu, Yosuke Hashimoto
  • Patent number: 11897477
    Abstract: A control device installed in a vehicle comprising an electronic control unit configured to: accept a plurality of first requests from a driving assistance system; arbitrate the first requests; calculate a second request that is a physical amount that differs from the first requests based on a result of arbitration in which the first requests are arbitrated; and distribute the second request to at least one of a plurality of actuator systems, wherein the electronic control unit is configured to, when there is the first request requesting a driving force exceeding a first driving force necessary for recovery from a fuel cut state, perform arbitration such that an actual driving force generated by the vehicle is no greater than the first driving force, until reaching a driving force lower limit realizable by a powertrain actuator included in the actuator system at a current gear ratio.
    Type: Grant
    Filed: January 5, 2022
    Date of Patent: February 13, 2024
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, ADVICS CO., LTD.
    Inventors: Nobuyuki Itoh, Shogi Fukukawa
  • Publication number: 20240025388
    Abstract: A brake control device forming a brake device includes an acquisition unit acquiring an operation value which is a value relating to an operation of a brake pedal in each control cycle, a target derivation unit deriving a final target braking power BPTrF which is a target of a braking power at a point in time when a prescribed time passes from a start of the operation of the brake pedal based on an increase state of the operation value when the operation of the brake pedal is started, and a brake controller increasing a vehicle braking power BP toward the final target braking power BPTrF.
    Type: Application
    Filed: January 27, 2020
    Publication date: January 25, 2024
    Applicant: ADVICS CO., LTD.
    Inventor: Masaki MARUYAMA
  • Patent number: 11878690
    Abstract: A start control device, which is a control device, includes: a first adjustment processing unit configured to execute a first adjustment process of instructing at least one of a brake device and a drive device to increase a braking/driving force when the braking/driving force is negative and the vehicle is stopped; and a second adjustment processing unit configured to start a second adjustment process of instructing at least one of the brake device and the drive device to increase the braking/driving force at a speed lower than an increasing speed of the braking/driving force before end of the first adjustment process on condition that the braking/driving force has become greater than or equal to a determination braking/driving force by the increase in the braking/driving force accompanying the execution of the first adjustment process.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: January 23, 2024
    Assignee: ADVICS CO., LTD.
    Inventors: Hiroyuki Kato, Yosuke Hashimoto
  • Patent number: 11858490
    Abstract: A brake control device according to an embodiment executes, for an electric braking wheel of either the front wheel and the rear wheel, a brake hold control for driving an electric braking device to move a propulsion shaft toward the braked member to be braked and bring it into contact with a piston, calculating a target braking force for maintaining the stationary state of the vehicle, subtracting a first braking force from the target braking force to calculate a required hydraulic braking force applied to the non-electric braking wheel different from the electric braking wheel, and controlling a differential pressure control valve connected to the non-electric braking wheel of the hydraulic braking device so that the required hydraulic braking force is applied to the non-electric braking wheel.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: January 2, 2024
    Assignee: ADVICS CO., LTD.
    Inventor: Terushige Uraoka
  • Patent number: 11840206
    Abstract: A housing of brake device includes a first oil path, a second oil path that is adjacent to the first oil path in a first direction along an axial direction of the first oil path and has a larger cross-section orthogonal to the axial direction than the first oil path, a third oil path connected to the first oil path, and a fourth oil path connected to the second oil path. A throttle member of the brake device is anchored to the housing by being press-fitted into the first oil path. The third oil path connects the fourth oil path through the throttle. When the throttle member moves in the first direction by releasing the press-fitting, the third oil path connects the fourth oil path through a gap between an inner circumferential surface forming the second oil path and an outer circumferential surface of the throttle member.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: December 12, 2023
    Assignee: ADVICS CO., LTD.
    Inventor: Haruki Hirata
  • Publication number: 20230391307
    Abstract: A vehicle brake device includes a first electric motor and a second electric motor; a first electrically powered cylinder device and a second electrically powered cylinder device driven by the first electric motor and the second electric motor, respectively; and a circuit board on which a first circuit and a second circuit for controlling the first electric motor and the second electric motor, respectively, are formed. In the vehicle brake device, the first electrically powered cylinder device and the second electrically powered cylinder device are arranged side by side in the radial direction with the axis thereof being parallel to each other, and the circuit board is arranged perpendicular to the axis of the first electrically powered cylinder device and the second electrically powered cylinder device.
    Type: Application
    Filed: October 26, 2021
    Publication date: December 7, 2023
    Applicant: ADVICS CO., LTD.
    Inventors: Tsuyoshi OTAKE, Atsushi TAKAHASHI
  • Patent number: 11827199
    Abstract: A vehicle brake device includes a stroke simulator, a stroke sensor, and a brake start determination unit. The stroke simulator includes a cylinder, a piston, an orifice, and a pressure sensor. The cylinder defines a liquid pressure chamber to which a brake liquid is supplied via a fluid path. The piston slides in the cylinder by the brake liquid supplied to the liquid pressure chamber. The orifice is formed in the fluid path. The pressure sensor detects a reaction pressure. The stroke sensor is configured to detect the stroke. The brake start determination unit determines an operation of the brake operation member has been started in a case where the reaction pressure detected by the pressure sensor becomes equal to or greater than a first threshold value and the stroke detected by the stroke sensor becomes equal to or greater than a second threshold value.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: November 28, 2023
    Assignee: ADVICS CO., LTD.
    Inventors: Tatsushi Kobayashi, Tomotaka Asano, Yasuhito Ishida, Ryosuke Endo, Takayuki Yamamoto
  • Publication number: 20230356703
    Abstract: A vehicle braking device includes a first pressurizing unit including a cylinder, a piston slidable in the cylinder, an electric motor that drives the piston, and an output chamber partitioned by the cylinder and the piston. The first pressurizing unit is configured such that a connection state between the output chamber and a reservoir is switched between communication and cut-off states according to the piston position, and the first pressurizing unit is capable of pressurizing fluid by decreasing a volume of the output chamber by movement of the piston to one axial direction side; a pressure sensor that detects a pressure of the output chamber; and an estimation unit that executes a position estimation process of moving the piston and estimating a switching position of the piston at which the connection state of the output chamber and the reservoir is switched based on a detection value of the pressure sensor.
    Type: Application
    Filed: March 26, 2021
    Publication date: November 9, 2023
    Applicant: ADVICS CO., LTD.
    Inventor: Yasunori SAKATA
  • Publication number: 20230356601
    Abstract: A braking control device adjusts a regenerative braking force and a friction braking force applied to a vehicle. The braking control device includes a stopping distance acquisition unit that acquires a distance moved until the vehicle in travel stops, as a stopping distance. The braking control device includes a brake adjustment unit that starts replacement control to replace the regenerative braking force among braking forces, which are applied to the vehicle, with the friction braking force, when the stopping distance becomes smaller than a replacement determination value.
    Type: Application
    Filed: September 30, 2021
    Publication date: November 9, 2023
    Applicant: ADVICS CO., LTD.
    Inventors: Yusaku YAMAMOTO, Kazuaki YOSHIDA
  • Publication number: 20230361703
    Abstract: A current command value deriving unit of a motor control device derives a d-axis current command value and a q-axis current command value based on a torque current map and a torque command value. A voltage command value deriving unit executes a first process of deriving a d-axis voltage command value based on the d-axis current command value and deriving a q-axis voltage command value based on q-axis current command value, and a second process of deriving the d-axis voltage command value based on the q-axis current command value and deriving the q-axis voltage command value based on a limit voltage and the d-axis voltage command value. When a motor is driven by field-weakening control, the voltage command value deriving unit switches from the second process to the first process when it is determined that the voltage command value satisfying the torque command value is derivable by the first process.
    Type: Application
    Filed: March 8, 2021
    Publication date: November 9, 2023
    Applicant: ADVICS CO., LTD.
    Inventors: Yuya HORIE, Tomoya TAKAHASHI
  • Patent number: 11807215
    Abstract: A brake control device is applied to a vehicle including a regenerative generator. The brake control device includes a pressure adjustment unit that includes an electric pump and a pressure adjustment valve, and that adjusts adjustment liquid pressure of a pressure adjustment fluid path between the electric pump and the pressure adjustment valve; and a controller that controls the electric pump and the pressure adjustment valve. The controller, before starting a replacement operation to replace a regenerative braking force by the regenerative generator with a friction braking force by the adjustment liquid pressure, performs preceding pressurization to increase the adjustment liquid pressure from “0” and maintain the adjustment liquid pressure at predetermined liquid pressure, and after performing the preceding pressurization, increases the adjustment liquid pressure more than the predetermined liquid pressure by increasing a rotation speed of the electric pump, and then execute the replacement operation.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: November 7, 2023
    Assignee: ADVICS CO., LTD.
    Inventors: Masaki Maruyama, Shunya Watanabe
  • Patent number: 11794709
    Abstract: The present disclosure comprises a reservoir cutoff valve provided on a pipe and configured to be opened in a non-energization state; a simulator cutoff valve provided on a pipe and configured to be closed in a non-energization state; an operation determination circuit configured to determine whether the brake operation member is in an operation execution state in which the brake operation member is being operated is; and a current control circuit that, when the operation determination circuit determines that the brake operation member is not in an operation execution state, supplies a first current to the reservoir cutoff valve, and when the operation determination circuit determines that the brake operation member is in an operation execution state, supplies a second current greater than the first current to the reservoir cutoff valve.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: October 24, 2023
    Assignee: ADVICS CO., LTD.
    Inventors: Kunihiro Nishiwaki, Jun Nomura, Yasuhito Ishida, Tatsushi Kobayashi
  • Publication number: 20230331201
    Abstract: A brake control device is applied to a brake device that controls a front-wheel braking force and a rear-wheel braking force. The brake control device includes a ratio calculation circuit that calculates a target front and rear braking force distribution ratio based on a target pitch angle, and a brake control circuit that performs a stability control by operating the brake device based on the target front and rear braking force distribution ratio during braking.
    Type: Application
    Filed: June 27, 2023
    Publication date: October 19, 2023
    Applicant: ADVICS CO.., LTD.
    Inventor: Yusaku YAMAMOTO
  • Publication number: 20230331208
    Abstract: In a brake fluid pressure control apparatus, a sensing device is integrally fixed to a master piston. The sensing device including the body to be sensed, which may include a magnet, and a sensing body, which may include a sensor. The sensing bodying sensing an axial position of the master piston without relative movement, that is, without providing play. This arrangement improves the sensing precision of the sensing device. Since it is not necessary to provide a member separate from the master piston in order to retain the body to be sensed, it is possible to achieve downsizing of the brake fluid pressure control apparatus.
    Type: Application
    Filed: September 29, 2021
    Publication date: October 19, 2023
    Applicant: ADVICS CO., LTD.
    Inventor: Shingo ONODA
  • Publication number: 20230331204
    Abstract: A vehicle stop determination device includes: a vehicle wheel speed sensor that outputs a signal according to a rotational speed of vehicle wheels; an acquisition unit that acquires a wheel speed at a predetermined reference time that a vehicle decelerates, based on an output signal of the vehicle wheel speed sensor; a derivation unit that derives a stopping position where the vehicle stops, based on the wheel speed acquired by the acquisition unit; and a determination unit that executes a stop determination to determine that the vehicle has stopped, when a difference distance between a position of the vehicle after the reference time and the stopping position is a stop determination value or less.
    Type: Application
    Filed: September 30, 2021
    Publication date: October 19, 2023
    Applicant: ADVICS CO., LTD.
    Inventor: Yusaku YAMAMOTO
  • Patent number: 11787292
    Abstract: A brake control device applied to a vehicle including a regenerative generator connected to a front wheel has an electric pump, and first and second pressure adjustment valves. The first pressure adjustment valve is provided in a brake fluid reflux path including the electric pump, adjusts the brake fluid to a first hydraulic pressure, and adjusts a rear wheel hydraulic pressure in a rear wheel cylinder to the first hydraulic pressure. The second pressure adjustment valve is provided in the reflux path, reduces the first hydraulic pressure to a second hydraulic pressure, and adjusts front wheel hydraulic pressure in a front wheel cylinder to the second hydraulic pressure. A front wheel flow rate to increase the front wheel hydraulic pressure is calculated using a brake operation member operation amount and a regeneration amount of the regenerative generator. The first pressure adjustment valve is controlled using the front wheel flow rate.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: October 17, 2023
    Assignee: ADVICS CO., LTD.
    Inventors: Masaki Maruyama, Shunya Watanabe
  • Publication number: 20230311829
    Abstract: A brake fluid pressure supply unit includes a fluid pressure generation device in which a piston that slides in a cylinder is driven by an electric motor to generate fluid pressure in a fluid pressure chamber formed in the cylinder; and a housing in which a fluid path connected to the fluid pressure chamber is formed. The electric motor and the cylinder are both attached to the housing. The electric motor is positioned more on upper side of the brake fluid pressure supply unit than the cylinder in a vertical direction. Thus, even if fluid leaks from the cylinder, the fluid having leaked can be prevented from entering inside of the electric motor. Thus, the operation of the electric motor is not impaired, whereby the reliability of the brake fluid pressure supply unit can be improved.
    Type: Application
    Filed: September 29, 2021
    Publication date: October 5, 2023
    Applicant: ADVICS CO., LTD.
    Inventor: Shingo ONODA
  • Publication number: 20230304804
    Abstract: A controller computes availability of the vehicle that indicates a range reachable by the vehicle by actuation of the actuator and generates a first travel route within a range of the availability of the vehicle, as a travel route followed by the vehicle, when the vehicle travels along a road ahead of the vehicle from a present position. When the road includes a curve and the first travel route cannot be generated within the availability range, the controller sets a target position to a position in the road located before the curve and generates a second travel route within the availability range, as the travel route followed by the vehicle, to stop the vehicle at the target position.
    Type: Application
    Filed: January 26, 2023
    Publication date: September 28, 2023
    Applicants: ADVICS CO., LTD., J-QuAD DYNAMICS INC., DENSO CORPORATION, AISIN CORPORATION, JTEKT CORPORATION
    Inventor: Yosuke OHMORI
  • Publication number: 20230303042
    Abstract: A braking control device executes pre-stop braking control to adjust a braking force when a vehicle stops. The pre-stop braking control includes reduction control that reduces the braking force, and increase control that is executed before the reduction control is started, to increase the braking force. An increasing unit executes the increase control, and a reducing unit executes the reduction control. A calculation unit calculates a braking distance extended by the reduction control, as an extended distance, and calculates a braking distance shortened by the increase control, as a shortened distance. The calculation unit calculates the extended distance to become longer when an operation amount of a braking operation member operated by a driver is reduced during braking than when the operation amount is not reduced. When a difference between the extended distance and the shortened distance is less than a determination value, the reducing unit starts the reduction control.
    Type: Application
    Filed: September 30, 2021
    Publication date: September 28, 2023
    Applicant: ADVICS CO., LTD.
    Inventor: Yusaku YAMAMOTO