Patents by Inventor Takao Kawasaki

Takao Kawasaki 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: 10731585
    Abstract: A control device of an internal combustion engine calculates an abnormal combustion prevention torque for preventing an abnormal combustion due to self-ignition whose heat source is a mixture of supplied fuel to the internal combustion engine and lubricant oil, on the basis of a cylinder wall temperature of the internal combustion engine or a temperature of a parameter in correlation with the cylinder wall temperature, and controls a torque of the internal combustion engine to prevent the torque of the internal combustion engine from becoming equal to or more than the abnormal combustion prevention torque.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: August 4, 2020
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Kentarou Yamano, Takao Kawasaki
  • Patent number: 10434842
    Abstract: An in-vehicle inverter device includes a noise reduction circuit, which has a common mode choke coil configured to reduce common mode noise and normal mode noise contained in DC power, and an inverter circuit, which receives the DC power in which the noise has been reduced. The noise reduction circuit includes: an input-side capacitor and an input-side resistor provided on the input side of the choke coil; an output-side capacitor and an output-side resistor provided on the output side of the choke coil; a first filter circuit that includes the choke coil, the input-side capacitor, and the input-side resistor; and a second filter circuit that includes the choke coil, the output-side capacitor, and the output-side resistor. The first and the second filter circuits reduce leakage noise generated in the inverter circuit.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: October 8, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takao Kawasaki, Yoshiki Nagata, Fumihiro Kagawa, Shunsuke Ambo, Koki Suzuki
  • Patent number: 10024312
    Abstract: An inverter includes a bus bar as a wiring and a ferrite core that covers the bus bar to absorb electromagnetic noise from the bus bar. The bus bar and ferrite core are integrated by mold forming using a resin material in a state of exposing a part of the ferrite core.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: July 17, 2018
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Satoshi Okada, Shinya Sato, Takao Kawasaki, Tetsuya Yamada, Kenji Maemura
  • Patent number: 10020707
    Abstract: A motor-driven compressor includes a housing, a compression portion, and an electric motor, a drive circuit, a circuit housing, a control circuit, a communication lead, and a metal shielding member. The compression portion and the electric motor are received in the housing. The circuit housing is arranged outside the housing and defines an accommodation chamber that receives the drive circuit. The control circuit is configured to control the electric motor by controlling the drive circuit. The communication lead is connected to the control circuit and drawn from the inside to the outside of the accommodation chamber. The metal shielding member is arranged in the accommodation chamber and covers the communication lead. The circuit housing includes a metal shielding portion, which is electrically grounded. The shielding member is electrically connected to the shielding portion.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: July 10, 2018
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Koki Suzuki, Fumihiro Kagawa, Takao Kawasaki
  • Publication number: 20170274735
    Abstract: An in-vehicle inverter device includes a noise reduction circuit, which has a common mode choke coil configured to reduce common mode noise and normal mode noise contained in DC power, and an inverter circuit, which receives the DC power in which the noise has been reduced. The noise reduction circuit includes: an input-side capacitor and an input-side resistor provided on the input side of the choke coil; an output-side capacitor and an output-side resistor provided on the output side of the choke coil; a first filter circuit that includes the choke coil, the input-side capacitor, and the input-side resistor; and a second filter circuit that includes the choke coil, the output-side capacitor, and the output-side resistor. The first and the second filter circuits reduce leakage noise generated in the inverter circuit.
    Type: Application
    Filed: March 24, 2017
    Publication date: September 28, 2017
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takao KAWASAKI, Yoshiki NAGATA, Fumihiro KAGAWA, Shunsuke AMBO, Koki SUZUKI
  • Publication number: 20170009687
    Abstract: A control device of an internal combustion engine calculates an abnormal combustion prevention torque for preventing an abnormal combustion due to self-ignition whose heat source is a mixture of supplied fuel to the internal combustion engine and lubricant oil, on the basis of a cylinder wall temperature of the internal combustion engine or a temperature of a parameter in correlation with the cylinder wall temperature, and controls a torque of the internal combustion engine to prevent the torque of the internal combustion engine from becoming equal to or more than the abnormal combustion prevention torque.
    Type: Application
    Filed: February 26, 2014
    Publication date: January 12, 2017
    Inventors: Kentarou YAMANO, Takao KAWASAKI
  • Publication number: 20160254723
    Abstract: A motor-driven compressor includes a housing, a compression portion, and an electric motor, a drive circuit, a circuit housing, a control circuit, a communication lead, and a metal shielding member. The compression portion and the electric motor are received in the housing. The circuit housing is arranged outside the housing and defines an accommodation chamber that receives the drive circuit. The control circuit is configured to control the electric motor by controlling the drive circuit. The communication lead is connected to the control circuit and drawn from the inside to the outside of the accommodation chamber. The metal shielding member is arranged in the accommodation chamber and covers the communication lead. The circuit housing includes a metal shielding portion, which is electrically grounded. The shielding member is electrically connected to the shielding portion.
    Type: Application
    Filed: February 22, 2016
    Publication date: September 1, 2016
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Koki SUZUKI, Fumihiro KAGAWA, Takao KAWASAKI
  • Publication number: 20160245292
    Abstract: A motor-driven compressor includes a compression mechanism, an electric motor, a housing, a drive circuit unit, a cover body, and a shield. The compression mechanism has a compression chamber and compresses refrigerant. The electric motor drives the compression mechanism. The housing accommodates the compression mechanism and the electric motor. The drive circuit unit drives the electric motor. The drive circuit unit includes a multi-layer board and electronic components mounted on the multi-layer board. The multi-layer board includes a ground layer. The cover body covers the drive circuit unit. The cover body is arranged at an outer side of the housing. The shield encompasses at least some of the electronic components. The shield is electrically connected to the ground layer of the multi-layer board.
    Type: Application
    Filed: February 17, 2016
    Publication date: August 25, 2016
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takao KAWASAKI, Fumihiro KAGAWA, Shinya SATO, Koki SUZUKI
  • Publication number: 20160141953
    Abstract: An inverter includes a bus bar as a wiring and a ferrite core that covers the bus bar to absorb electromagnetic noise from the bus bar. The bus bar and ferrite core are integrated by mold forming using a resin material in a state of exposing a part of the ferrite core.
    Type: Application
    Filed: November 12, 2015
    Publication date: May 19, 2016
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Satoshi OKADA, Shinya SATO, Takao KAWASAKI, Tetsuya YAMADA, Kenji MAEMURA
  • Patent number: 9309858
    Abstract: In an internal combustion engine control device, a predetermined margin torque is set such that it is possible to maintain a predetermined engine idling speed by adjusting ignition timing with respect to load fluctuations during idling operation. The margin torque is set to decrease, as a load, acting on the internal combustion engine during idling operation, increases. Accordingly, the margin torque can be set to an appropriate value, and thus it is possible to improve a fuel economy performance during idling operation of the internal combustion engine.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: April 12, 2016
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Kentaro Yamano, Yuji Sasaki, Takao Kawasaki
  • Publication number: 20140360464
    Abstract: In an internal combustion engine control device, a predetermined margin torque is set such that it is possible to maintain a predetermined engine idling speed by adjusting ignition timing with respect to load fluctuations during idling operation. The margin torque is set to decrease, as a load, acting on the internal combustion engine during idling operation, increases. Accordingly, the margin torque can be set to an appropriate value, and thus it is possible to improve a fuel economy performance during idling operation of the internal combustion engine.
    Type: Application
    Filed: January 23, 2013
    Publication date: December 11, 2014
    Inventors: Kentaro Yamano, Yuji Sasaki, Takao Kawasaki
  • Patent number: 8316827
    Abstract: An engine intake air quantity control apparatus is provided with a throttle valve, a supercharger, a variable intake valve operating device and an intake air control device. The throttle valve varies an intake air flow passage area of an intake passage. The supercharger supercharges intake air. The variable intake valve operating device changes an intake valve timing of an intake valve in accordance with an engine operating state. The intake air control device increases an opening degree of the throttle valve in accordance with a detected increase of an accelerator pedal depression amount, and increases an intake air quantity by starting to supercharge the intake air with the supercharger upon a prescribed throttle valve opening degree having been reached. The intake air control device changes the prescribed throttle valve opening degree in accordance with the intake valve timing of the intake valve.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: November 27, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takeshi Miyamoto, Takashi Nakazawa, Takao Kawasaki
  • Publication number: 20100154757
    Abstract: An engine intake air quantity control apparatus is provided with a throttle valve, a supercharger, a variable intake valve operating device and an intake air control device. The throttle valve varies an intake air flow passage area of an intake passage. The supercharger supercharges intake air. The variable intake valve operating device changes an intake valve timing of an intake valve in accordance with an engine operating state. The intake air control device increases an opening degree of the throttle valve in accordance with a detected increase of an accelerator pedal depression amount, and increases an intake air quantity by starting to supercharge the intake air with the supercharger upon a prescribed throttle valve opening degree having been reached. The intake air control device changes the prescribed throttle valve opening degree in accordance with the intake valve timing of the intake valve.
    Type: Application
    Filed: December 1, 2009
    Publication date: June 24, 2010
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Takeshi MIYAMOTO, Takashi NAKAZAWA, Takao KAWASAKI
  • Publication number: 20080262054
    Abstract: [OBJECT] To provide a pharmaceutical composition containing a thiazolidinedione compound and having superior solubility. [MEANS FOR SOLUTION] A pharmaceutical composition incorporating cellulose, a cellulose derivative, a polyvinyl alcohol derivative, a polyvinyl alcohol derivative mixture or a mixture thereof with 5-{4-[(6-methoxy-1-methyl-1H-benzimidazol-2-yl)methoxy]benzyl}thiazolidine-2,4-dione, or a pharmacologically acceptable salt thereof.
    Type: Application
    Filed: July 7, 2006
    Publication date: October 23, 2008
    Inventors: Takao Kawasaki, Nobuyuki Suzuki, Shuichi Yada
  • Patent number: 6827051
    Abstract: A quantity of internal EGR gases remaining in an engine is estimated in accordance with an exhaust valve closing timing, an intake valve opening timing and an engine speed. The estimated internal EGR quantity is a sum of a base quantity and an increase correction quantity determined in accordance with a valve overlap period, its middle angular position in crankshaft rotation and intake pressure. The estimated internal EGR quantity is used for estimating an engine cylinder intake air quantity and for engine control such as ignition timing control, and intake air quantity control.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: December 7, 2004
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takao Kawasaki, Masahiro Arai
  • Patent number: 6705293
    Abstract: A control system for a multi-cylinder internal combustion engine is provided. The engine is of the kind in which switching between a full cylinder operation with all cylinders in operation and a part cylinder operation with some of cylinders kept out of operation is selectively performed. The control system comprises a first calculator for calculating, at the part cylinder operation, a target intake air fuel quantity per one operative cylinder that enables the engine to produce a torque equal to that at the full cylinder operation, a second calculator for calculating a throttle valve target opening area at the part cylinder operation from the target intake air quantity per one operative cylinder, and a controller for controlling a throttle valve opening degree so that the throttle valve target opening area is obtained. A control method is also provided.
    Type: Grant
    Filed: March 5, 2002
    Date of Patent: March 16, 2004
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Takao Kawasaki
  • Patent number: 6513490
    Abstract: A system and method for unthrottled intake air control for an internal combustion engine. The engine has at least one combustion chamber provided with electromagnetic intake means. The opening and closing times of the intake means are adjustable entirely independently from the crankshaft position to control intake air supplied to the combustion chamber. A control unit is used to implement instructions for determining a first portion of requested intake airflow, which first portion requests a first engine response performance, and instructions for determining a second portion of requested intake airflow, which second portion requests a second engine response performance.
    Type: Grant
    Filed: December 4, 2000
    Date of Patent: February 4, 2003
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takao Kawasaki, Masahiro Arai, Hatsuo Nagaishi
  • Patent number: 6513494
    Abstract: A system and method of optimally controlling ignition timings in an engine conditioned in first and second modes of intake control. A control unit includes an unthrottled operation control conducting the first mode by varying a closing timing of an intake valve and fixing a throttle position of a throttle valve, a throttled operation control conducting the second mode by varying the throttle position of the throttle valve and fixing the closing timing of the intake valve, and an ignition timing control determining different ignition timings to be used in the first and second modes.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: February 4, 2003
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takao Kawasaki, Hatsuo Nagaishi
  • Patent number: 6502546
    Abstract: A control unit controls both a motor actuated throttle valve and a magnetically actuated variable valve in accordance with an operation condition of an internal combustion engine. The control unit is configured to provide both a first control mode wherein an intake air control is carried out by controlling the open/close timing of the variable valve while keeping the throttle valve at a full-open or near full-open position and a second control mode wherein the intake air control is carried out by controlling the position of the throttle valve while reducing a controllable range of the open/close timing of the variable valve. The first and second control modes are selectively switched in accordance with the operation condition of the engine. The first and second control modes allow the engine to output the same engine torque under the same operation condition of the engine.
    Type: Grant
    Filed: December 4, 2000
    Date of Patent: January 7, 2003
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takao Kawasaki, Masahiro Arai
  • Publication number: 20020148439
    Abstract: A control system for a multi-cylinder internal combustion engine is provided. The engine is of the kind in which switching between a full cylinder operation with all cylinders in operation and a part cylinder operation with some of cylinders kept out of operation is selectively performed. The control system comprises a first calculator for calculating, at the part cylinder operation, a target air fuel quantity per one operative cylinder that enables the engine to produce a torque equal to that at the full cylinder operation, a second calculator for calculating a throttle valve target opening area at the part cylinder operation from the target intake air quantity per one operative cylinder, and a controller for controlling a throttle valve opening degree so that the throttle valve target opening area is obtained. A control method is also provided.
    Type: Application
    Filed: March 5, 2002
    Publication date: October 17, 2002
    Applicant: NISSAN MOTOR CO., LTD.
    Inventor: Takao Kawasaki