Patents by Inventor Masato Kaigawa

Masato Kaigawa 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: 20200019196
    Abstract: A control apparatus for controlling a linear solenoid by controlling a driving current supplied to the linear solenoid through a feedback control. The feedback control is executed by a feedback control system having parameters that are determined in accordance with an ILQ design method. In a frequency characteristic of a gain of a transfer function representing a ratio of an output to a disturbance in the feedback control system, the gain is lower than 0[dB] throughout all frequency ranges.
    Type: Application
    Filed: July 9, 2019
    Publication date: January 16, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takaaki TOKURA, Katsumi KONO, Masato KAIGAWA, Masato MATSUBARA, Hitoshi MATSUNAGA, Akira HINO
  • Patent number: 9476368
    Abstract: A control device of a vehicle drive device includes an engine having a supercharger and an automatic transmission outputting power of the engine to drive wheels, when a supercharging pressure at the end of the upshift is increased as compared to the start of the upshift such that an engine torque at an end of an upshift of the automatic transmission is made larger than that at a start of the upshift, a target supercharging pressure being set depending on a predicted engine operation state after the upshift to allow a shift operation to proceed while an increase of the supercharging pressure is started before a completion of the upshift such that the supercharging Pressure reaches the target supercharging pressure, the supercharging pressure being controlled such that a target engine torque determined based on a vehicle state is achieved, and when the supercharging pressure cannot be increased in the upshift before the end of the upshift to a magnitude required for generating the target engine torque at the en
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: October 25, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takaaki Tokura, Masato Kaigawa
  • Patent number: 9199645
    Abstract: Disclosed is a vehicle control apparatus which can prevent drivability from being deteriorated. The ECU is operative to determine whether the previously depressed brake is in the “ON” or “OFF” state when the vehicle is determined as being not travelling on a bad road, the accelerator being in the “ON” state, and the brake being in the “ON” state. When the ECU is operative to determine that the previously depressed brake is in the “OFF” state, and the vehicle is in the reduced speed state, the ECU is operative to perform the reduction process of the engine output under the condition that the simultaneous depressions of the accelerator and brake pedals are held for less than 10 seconds, and the vehicle speed is 7 km/hr or more. When, on the other hand, the ECU determines that the vehicle is travelling on the bad road, the ECU is operative not to perform the reduction process.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: December 1, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toshiya Oishi, Masato Kaigawa, Masashi Takagi, Michihito Shimada, Yuki Minase, Kenichi Okaya, Tsutomu Miyazaki
  • Patent number: 9005080
    Abstract: A control device for a drive device of a vehicle which is provided with an engine, a supercharger to raise a pressure of intake air introduced in said engine, an accelerating member manually operable by an operator of the vehicle to accelerate the vehicle, and an automatic transmission constituting a portion of a power transmitting path between said engine and drive wheels, and wherein said engine is placed in a first operating state in which said supercharger is operated, or a second operating state in which an operation of said supercharger is restricted as compared with that in said first operating state, said control device comprising: a speed ratio selection control portion configured to implement a speed ratio selection control to change a method of selecting a speed ratio of said automatic transmission depending upon a rate of increase of an operation amount of said accelerating member, where said engine will be placed in said first operating state if said automatic transmission is shifted to select a
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: April 14, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takaaki Tokura, Masato Kaigawa
  • Publication number: 20150088390
    Abstract: A control device for a drive device of a vehicle which is provided with an engine, a supercharger to raise a pressure of intake air introduced in said engine, an accelerating member manually operable by an operator of the vehicle to accelerate the vehicle, and an automatic transmission constituting a portion of a power transmitting path between said engine and drive wheels, and wherein said engine is placed in a first operating state in which said supercharger is operated, or a second operating state in which an operation of said supercharger is restricted as compared with that in said first operating state, said control device comprising: a speed ratio selection control portion configured to implement a speed ratio selection control to change a method of selecting a speed ratio of said automatic transmission depending upon a rate of increase of an operation amount of said accelerating member, where said engine will be placed in said first operating state if said automatic transmission is shifted to select a
    Type: Application
    Filed: November 18, 2011
    Publication date: March 26, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takaaki Tokura, Masato Kaigawa
  • Publication number: 20150038292
    Abstract: A control device of a vehicle drive device includes an engine having a supercharger and an automatic transmission outputting power of the engine to drive wheels, when a supercharging pressure at the end of the upshift is increased as compared to the start of the upshift such that an engine torque at an end of an upshift of the automatic transmission is made larger than that at a start of the upshift, a target supercharging pressure being set depending on a predicted engine operation state after the upshift to allow a shift operation to proceed while an increase of the supercharging pressure is started before a completion of the upshift such that the supercharging Pressure reaches the target supercharging pressure, the supercharging pressure being controlled such that a target engine torque determined based on a vehicle state is achieved, and when the supercharging pressure cannot be increased in the upshift before the end of the upshift to a magnitude required for generating the target engine torque at the en
    Type: Application
    Filed: March 2, 2012
    Publication date: February 5, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takaaki Tokura, Masato Kaigawa
  • Patent number: 8589051
    Abstract: An ECU includes: an engine control unit that controls devices provided for an engine on the basis of a target engine rotational speed; and an engine model that calculates the target engine rotational speed such that the target engine rotational speed varies in accordance with a target engine torque and an actual engine rotational speed in a steady state, and that calculates the target engine rotational speed such that the target engine rotational speed varies in accordance with the target engine torque independently of the actual engine rotational speed in a transient state in which the engine is unstable as compared with the steady state. When the engine is controlled by the thus configured ECU, the control accuracy is improved.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: November 19, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Seiji Kuwahara, Masato Kaigawa, Toshiya Oishi, Shogo Matsumoto
  • Patent number: 8409056
    Abstract: A shift output torque control unit executes a shift output torque control to control an engine torque so as to reduce a driving force difference, which is a variation width of a driving force due to downshift of an automatic transmission. Thus, in comparison with the case in which the shift output torque control is not executed, it is possible to smooth a variation in driving force associated with the downshift. As a result, occupants' comfort and controllability to driving operation may be improved.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: April 2, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Seiji Kuwahara, Hideaki Otsubo, Masato Kaigawa, Shogo Matsumoto, Masayuki Baba
  • Patent number: 8315767
    Abstract: A control device for an automatic transmission 10 having shift control means 88 operative to select a manual shift mode is provided for preventing acceleration response from deteriorating in the automatic transmission 10. The control device includes automatic up-range control means 90 for switching a range to a “D” range when high oil-temperature determining means determines presence of a high oil-temperature state, and high oil-temperature down-range permitting means 92 for permitting a down-range during a manual shift operation until a selected uppermost gear position GSELECT reaches a determining gear position GJUGE when the accelerator-on drive determining means 86 subsequently determines presence of an accelerator-on drive. Even when obtaining a drive force is attempted during an accelerator-on drive mode after switching the range, the down-range by the manual shift operation is permitted until the selected uppermost gear position GSELECT reaches the determining gear position GJUGE.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: November 20, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Sawada, Masato Kaigawa, Shinya Toyoda, Kei Kitajima, Yoshio Hasegawa, Fuminori Monji
  • Patent number: 8313414
    Abstract: An electronic control unit is provided with two types of gear change maps: a first gear change map based on the vehicle speed and the accelerator pedal operation amount; and a second gear change map based on the vehicle speed and the required drive force of the vehicle. The electronic control unit determines whether the automatic transmission should downshift with reference to the first gear change map, and determines whether the automatic transmission should upshift with reference to the second gear change map.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: November 20, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Seiji Kuwahara, Hideaki Otsubo, Masato Kaigawa, Masayuki Baba
  • Patent number: 8301351
    Abstract: A parameter ?(OUT) having an accelerator pedal position, a vehicle speed and a drive force as components is set according to information representing a driver's operation and information representing running environment of a vehicle. A gear is set according to the parameter ?(OUT) and a map determining the gear based on the accelerator pedal position, the vehicle speed and the drive force. A gear shift line is defined such that a rate of increase of the drive force with respect to the vehicle speed is zero or more. A down-shift line is defined such that the drive force decreases with increase in accelerator pedal position. Down-shift after up-shift as well as the up-shift after the down-shift are inhibited when both a condition that an amount of change of the accelerator pedal position after last gear shift is larger than a threshold and a condition that an amount of change of the drive force after the last gear shift is larger than the threshold are satisfied.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: October 30, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Seiji Kuwahara, Masato Kaigawa
  • Publication number: 20120271526
    Abstract: Disclosed is a vehicle control apparatus which can prevent drivability from being deteriorated. The ECU is operative to determine whether the previously depressed brake is in the “ON” or “OFF” state when the vehicle is determined as being not travelling on a bad road, the accelerator being in the “ON” state, and the brake being in the “ON” state. When the ECU is operative to determine that the previously depressed brake is in the “OFF” state, and the vehicle is in the reduced speed state, the ECU is operative to perform the reduction process of the engine output under the condition that the simultaneous depressions of the accelerator and brake pedals are held for less than 10 seconds, and the vehicle speed is 7 km/hr or more. When, on the other hand, the ECU determines that the vehicle is travelling on the bad road, the ECU is operative not to perform the reduction process.
    Type: Application
    Filed: December 17, 2009
    Publication date: October 25, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toshiya Oishi, Masato Kaigawa, Masashi Takagi, Michihito Shimada, Yuki Minase, Kenichi Okaya, Tsutomu Miyazaki
  • Patent number: 8271168
    Abstract: A shift controller includes: a shift control unit automatically shifting gears of an automatic transmission using a basic shift line map; a shift line map switching control unit switching from the basic shift line map to a high fluid temperature shift line map set on a lower vehicle speed side when a hydraulic fluid temperature in the automatic transmission is higher than a predetermined value; and a low power state determination unit determining whether a vehicle is in a low power state in which a required power related value used for gear shift determination is lower than a predetermined determination value. The shift line map switching control unit switches from the high fluid temperature shift line map back to the basic shift line map when the hydraulic fluid temperature is lower than the predetermined value and the vehicle is in the low power state.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: September 18, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Sawada, Masato Kaigawa, Kei Kitajima, Yoshio Hasegawa, Fuminori Monji
  • Patent number: 8265840
    Abstract: A control device for an automatic transmission is disclosed wherein a shift point depending on a variation in vehicle acceleration is modified on a real time basis in accordance with not only a corrected result on a shift point depending on piece-to-piece variations of automatic transmissions, but also actual acceleration for shortening a time required for learning with high precision with no need to be matched. Shift point real-time modifying means is provided for modifying the altered shift point based on a value of a ratio between a value of actual engine-rotation acceleration at an upshift-determining timing during a power-on running and a value of reference engine-rotation acceleration obtained by substituting a value of actual engine-rotation acceleration to a value for a reference running state having no impact on acceleration of a vehicle, and a target maximum engine rotation speed.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: September 11, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masato Watanabe, Masato Kaigawa, Ichiro Kitaori, Masakazu Owatari
  • Patent number: 8180551
    Abstract: A vehicular control apparatus that controls an engine mounted on a vehicle includes: a generating section that generates respective required values of the engine based on quantities of state in different units of measure; an adjusting section that converts the required values into values in a common unit of measure and obtains a desired value of the engine based on the values in the common unit of measure; a control section that controls the engine based on the obtained desired value; and a determining section that determines whether the vehicle is in an idling state using respective reference values set for the quantities of state, the required values, and the desired value. One of the reference values is converted into the remaining reference values in different units of measure.
    Type: Grant
    Filed: January 8, 2007
    Date of Patent: May 15, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Seiji Kuwahara, Masato Kaigawa
  • Patent number: 8068965
    Abstract: A control apparatus for a shift-position changing mechanism that changes the shift positions of an automatic transmission mounted in a vehicle using a rotational force of an actuator based on a signal corresponding to the state of an operation member, including: a mechanism that generates a rotational force for moving the actuator toward a rotation stop positional-range corresponding to the shift position, based on a rotation stop position of the actuator; a detection unit that detects a rotation amount of the actuator; a control unit that controls the actuator based on the signal and the detected rotation amount; and a learning unit that learns the rotation stop positional-range corresponding to the shift position, based on an amount by which the actuator has been rotated since a control over the actuator executed by the control unit is stopped.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: November 29, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hideki Kubonoya, Masato Kaigawa, Keiji Hoshino, Shigeru Kamio
  • Patent number: 8010272
    Abstract: A driving force control system includes an internal combustion engine model (1000) represented by a model linearized while including a first-order lag component, a calculator (2000) calculating deviation between target engine torque and estimated engine torque, a delay compensator (3000) compensating for response delay based on the deviation, and an adder (4000) calculating an engine controlled variable by adding delay-compensated deviation to the target engine torque.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: August 30, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Seiji Kuwahara, Masato Kaigawa
  • Patent number: 7953534
    Abstract: The invention relates to a vehicle integrated-control apparatus and method that sets a final control target by coordinating a control target primarily set based on an input of a driver with instruction values from the control systems; and that causes a drive control system to control a drive source and a stepped automatic transmission to achieve the final control target. With this apparatus and method, at least one of the control systems, which provide instruction values to be coordinated with the primarily set control target, is notified of a range of control targets that can be achieved at a current shift speed; a range of control targets that can be achieved by changing the current shift speed to a currently achievable shift speed; and a range of control targets that can be achieved without changing the current shift speed to another shift speed.
    Type: Grant
    Filed: April 24, 2006
    Date of Patent: May 31, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Seiji Kuwahara, Masato Kaigawa
  • Patent number: 7949451
    Abstract: A powertrain manager executes a program including the steps of: reading an instruction gear ratio kgear(1) for transmission control; calculating an actual gear ratio kgear(2); determining that failure of an automatic transmission has occurred on a low gear side if relation of kgear(1)<{kgear(2)/?} or kgear(1)<{kgear(2)??} is satisfied; and substituting larger one of kgear(1) and kgear(2) into a gear ratio for operation.
    Type: Grant
    Filed: October 19, 2006
    Date of Patent: May 24, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Seiji Kuwahara, Masato Kaigawa
  • Patent number: 7920948
    Abstract: An assumption torque setting device for an engine that executes a torque reduction process during gear shifting. The device sets a torque assumed to be output by the engine and based on a target torque from which an amount corresponding to the torque reduction process is excluded as an assumption torque during the gear shifting. The device includes an assumption model torque calculation unit which calculates an assumption model torque from the target torque from which an amount corresponding to the torque reduction process is excluded based on an internal combustion engine delay model. An assumption torque calculation unit calculates before torque reduction is performed an assumption torque based on an engine operation state and calculates when the torque reduction is being performed an assumption torque based on the assumption model torque and an assumption torque calculated from the engine operation state.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: April 5, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Seiji Kuwahara, Masato Kaigawa