Patents by Inventor Takafumi Nishikawa

Takafumi Nishikawa 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: 10367375
    Abstract: A power supply apparatus includes a power supply unit that supplies power from a power source to a power receiving apparatus, a power acquisition unit that acquires a power value of power from the power source upon detecting another power receiving apparatus, and a controller that determines whether to supply the power from the power source to the another power receiving apparatus based on the power value.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: July 30, 2019
    Assignee: Funai Electric Co., LTD.
    Inventors: Takafumi Nishikawa, Naoyuki Wakabayashi, Yuzuru Hashimoto
  • Patent number: 10312814
    Abstract: A power source apparatus for supplying power to a load includes a switch and a controller. The controller detects voltage applied to the switch. The controller further switches a state of the switch from OFF to ON when the detected voltage is equal to or smaller than a predetermined threshold value.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: June 4, 2019
    Assignee: Funai Electric Co., LTD.
    Inventors: Naoyuki Wakabayashi, Takafumi Nishikawa, Koji Ohira
  • Patent number: 10270290
    Abstract: A power supply device includes a power supply portion, a power supply coil portion having a first end connected to the power supply portion and a second end connected to ground, and a counter wound coil portion that faces the power supply coil portion, the winding direction of which is opposite to that of the power supply coil portion, and the counter wound coil portion has an opened first end and a second end connected to ground.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: April 23, 2019
    Assignee: Funai Electric Co., Ltd.
    Inventors: Takafumi Nishikawa, Naoyuki Wakabayashi
  • Patent number: 10205347
    Abstract: A power supply device that is capable of suppressing complexity of the circuit structure and increasing in the substrate area for the impedance adjustment configuration is provided. The power supply device includes a power supply antenna, supplying a power to a power receiving device, a reactance adjustment part, adjusting a reactance of the power supply antenna; a power source, supplying a voltage to the power supply antenna; and a controller, controlling the reactance adjustment part and the voltage of the power source.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: February 12, 2019
    Assignee: FUNAI ELECTRIC CO., LTD.
    Inventors: Takafumi Nishikawa, Naoyuki Wakabayashi
  • Patent number: 10193399
    Abstract: The invention provides a power supply device, which is capable of properly supplying the power even if the power is supplied to the power receiving devices having a number exceeding the number that the communication part is capable of simultaneously communicating with. The power supplying device includes: a power supply part, capable of supplying a power to a plurality of external devices; a communication part, capable of communicating with the external devices; and a controller, disconnecting one or more of the external devices based on a power supplied information of the external devices being in a predetermined range in a case that a number of requests for a communication from the external devices exceeds a number that the communication part is capable of communicating with at the same time.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: January 29, 2019
    Assignee: FUNAI ELECTRIC CO., LTD.
    Inventors: Takafumi Nishikawa, Yoshitaka Fujimoto
  • Publication number: 20180131280
    Abstract: A power source apparatus for supplying power to a load includes a switch and a controller. The controller detects voltage applied to the switch. The controller further switches a state of the switch from OFF to ON when the detected voltage is equal to or smaller than a predetermined threshold value.
    Type: Application
    Filed: November 3, 2017
    Publication date: May 10, 2018
    Applicant: Funai Electric Co., Ltd.
    Inventors: Naoyuki Wakabayashi, Takafumi Nishikawa, Koji Ohira
  • Publication number: 20170110884
    Abstract: The invention provides a power supply device, which is capable of properly supplying the power even if the power is supplied to the power receiving devices having a number exceeding the number that the communication part is capable of simultaneously communicating with. The power supplying device includes: a power supply part, capable of supplying a power to a plurality of external devices; a communication part, capable of communicating with the external devices; and a controller, disconnecting one or more of the external devices based on a power supplied information of the external devices being in a predetermined range in a case that a number of requests for a communication from the external devices exceeds a number that the communication part is capable of communicating with at the same time.
    Type: Application
    Filed: October 19, 2016
    Publication date: April 20, 2017
    Applicant: FUNAI ELECTRIC CO., LTD.
    Inventors: TAKAFUMI NISHIKAWA, YOSHITAKA FUJIMOTO
  • Publication number: 20170063155
    Abstract: A power supply device includes a power supply portion, a power supply coil portion having a first end connected to the power supply portion and a second end connected to ground, and a counter wound coil portion that faces the power supply coil portion, the winding direction of which is opposite to that of the power supply coil portion, and the counter wound coil portion has an opened first end and a second end connected to ground.
    Type: Application
    Filed: August 24, 2016
    Publication date: March 2, 2017
    Inventors: Takafumi NISHIKAWA, Naoyuki WAKABAYASHI
  • Publication number: 20170063162
    Abstract: A power supply apparatus includes a power supply unit that supplies power from a power source to a power receiving apparatus, a power acquisition unit that acquires a power value of power from the power source upon detecting another power receiving apparatus, and a controller that determines whether to supply the power from the power source to the another power receiving apparatus based on the power value.
    Type: Application
    Filed: August 25, 2016
    Publication date: March 2, 2017
    Applicant: Funai Electric Co., Ltd.
    Inventors: Takafumi Nishikawa, Naoyuki Wakabayashi, Yuzuru Hashimoto
  • Publication number: 20170012473
    Abstract: A power supply device that is capable of suppressing complexity of the circuit structure and increasing in the substrate area for the impedance adjustment configuration is provided. The power supply device includes a power supply antenna, supplying a power to a power receiving device, a reactance adjustment part, adjusting a reactance of the power supply antenna; a power source, supplying a voltage to the power supply antenna; and a controller, controlling the reactance adjustment part and the voltage of the power source.
    Type: Application
    Filed: July 7, 2016
    Publication date: January 12, 2017
    Applicant: FUNAI ELECTRIC CO., LTD.
    Inventors: TAKAFUMI NISHIKAWA, NAOYUKI WAKABAYASHI
  • Publication number: 20160359373
    Abstract: A power supply apparatus includes a resonant circuit that comprises a coil wound on a plane and determines a resonant frequency, a driver that drives the resonant circuit, and an inductance changing unit connected to a first end portion of the coil. The inductance changing unit moves the first end portion of the coil and changes inductance of the coil.
    Type: Application
    Filed: June 3, 2016
    Publication date: December 8, 2016
    Applicant: Funai Electric Co., Ltd.
    Inventor: Takafumi Nishikawa
  • Publication number: 20150372494
    Abstract: A wireless power supply device includes a resonant circuit including a power supply coil and a resonant capacitor. The wireless power supply device also includes a controller that changes a waveform of power in the resonant circuit and causes a phase difference between a phase of a drive signal that drives the resonant circuit and a phase of current flowing through the power supply coil to be substantially 0.
    Type: Application
    Filed: June 19, 2015
    Publication date: December 24, 2015
    Applicant: Funai Electric Co., Ltd.
    Inventors: Naoyuki Wakabayashi, Takafumi Nishikawa, Yukikazu Nobata
  • Patent number: 5447141
    Abstract: An evaporative emission control system for an internal combustion engine detects abnormality of the system based on pressure within a purging passage at a location between a purge control valve arranged therein and an intake passage of the engine, and pressure within a canister for adsorbing evaporative fuel generated from a fuel tank of the engine, when it delivers a valve opening command to open the purge control valve.
    Type: Grant
    Filed: November 9, 1994
    Date of Patent: September 5, 1995
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Masakazu Kitamoto, Takafumi Nishikawa, Shun Masuda
  • Patent number: 5069187
    Abstract: A fuel supply control system for an internal combustion engine having an intake pipe, and a throttle valve arranged in the intake pipe. A basic value of a fuel amount to be supplied to the engine is determined based on a load on the engine. The determined basic value of the fuel amount is corrected by a correction value for increasing the fuel amount during and/or after acceleration of the engine. The correction value is determined based on a change in the opening degree of the throttle valve. The correction valve is further determined based on a change in the magnitude of the load on the engine.
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: December 3, 1991
    Assignee: Honda Giken Kogyo K.K.
    Inventors: Akira Kato, Takafumi Nishikawa, Shun Masuda
  • Patent number: 4987871
    Abstract: An operation control system for internal combustion engines at and after starting has an engine temperature sensor, a control valve for controlling the amount of intake air to be supplied to the engine, and a valve opening determining device responsive to an output from the engine temperature sensor for determining the opening of the control valve. The valve opening determining device sets the opening of the control valve at the start of the engine to a value such that the intake air amount is smaller as the engine temperature is lower. A fuel amount determining device is responsive to the output from the engine temperature sensor for determining the amount of fuel to be supplied to the engine at starting. A correction value determining device is responsive to the opening of a throttle valve of the engine for determining a correction value for the fuel amount in such a manner as to increase the fuel amount at a larger rate as the throttle opening is larger.
    Type: Grant
    Filed: February 3, 1989
    Date of Patent: January 29, 1991
    Assignee: Honda Giken Kogyo K.K.
    Inventor: Takafumi Nishikawa
  • Patent number: 4765301
    Abstract: A method of controlling the quantity of fuel supplied to an internal combustion engine after starting thereof. An initial value of a fuel increment is set in response to a temperature of the engine immediately after the start of the engine, and is subsequently decreased with the lapse of time. A quantity of fuel set by the use of the thus decreased fuel increment is supplied to the engine. The rate of decrease of the fuel increment is set to a value corresponding to a sensed temperature representative of fuel injection valves of the engine. Preferably, the rate of decrease is set to a smaller value when the sensed temperature is equal to or higher than a value corresponding to the boiling point of the fuel, than a value set when the former is lower than the latter.
    Type: Grant
    Filed: February 6, 1987
    Date of Patent: August 23, 1988
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yuzuru Koike, Takafumi Nishikawa
  • Patent number: 4727846
    Abstract: The fuel supply to an internal combustion engine is decreased when the engine is in an operating region wherein the intake passage pressure is lower than a first predetermined value. The first predetermined value is corrected in response to detected atmospheric pressure encompassing the engine. Further, the fuel supply to the engine is interrupted when the engine is in a second operating region wherein the intake passage pressure is lower than a second predetermined value, which is lower than the first predetermined value. The second predetermined value is corrected in response to the detected atmospheric pressure, together with the first predetermined value.
    Type: Grant
    Filed: October 10, 1985
    Date of Patent: March 1, 1988
    Assignee: Honda Giken Kogyo K.K.
    Inventors: Akihiro Yamato, Takafumi Nishikawa
  • Patent number: 4718387
    Abstract: A method of controlling the timing of fuel injection in an internal combustion engine, wherein the injection timing of each of a plurality of fuel injection valves provided respectively for as many cylinders is determined in response to engine operating conditions. When it is determined that the engine is in a first predetermined operating condition, fuel is injected into a cylinder that corresponds to the present pulse of a control signal upon generation of same. The control signal is generated at a predetermined crank angle before a top dead center of each cylinder at the start of the intake stroke in the cylinder. When the engine is in a second predetermined operating condition, fuel is injected into another cylinder that corresponds to a pulse of the control signal next to the present pulse, upon generation of the present pulse. Preferably, the first and second predetermined operating conditions are determined by the engine rotational speed and/or the engine temperature.
    Type: Grant
    Filed: January 30, 1987
    Date of Patent: January 12, 1988
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Takashi Shinchi, Takafumi Nishikawa
  • Patent number: 4708115
    Abstract: An amount of fuel to be supplied to an internal combustion engine is determined in dependence upon operating conditions of the engine and is corrected by a correction variable dependent upon atmospheric pressure. The correction variable is set so as to increase with a decrease in atmospheric pressure, and the set value of the correction variable is modified so as to decrease with a rise in the engine rotational speed. The correction variable resulting from this modification is added to the amount of fuel to be supplied to the engine to correct the same.
    Type: Grant
    Filed: January 21, 1987
    Date of Patent: November 24, 1987
    Assignee: Honda Giken Kogyo K.K.
    Inventors: Akihiro Yamato, Takafumi Nishikawa