Patents by Inventor Yusuke Niwa

Yusuke Niwa 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: 10851701
    Abstract: An engine cooling system includes a coolant circulation path, which circulates coolant between the water jacket and the radiator of an internal combustion engine, a pump, a control valve, which is provided in the coolant circulation path, and a controller. The controller executes a warming-up promotion control and a pressure relaxation control. In the pressure relaxation control, the controller controls the aperture ratio of the radiator port such that the lower the temperature of the radiator, the lower becomes the engine rotational speed at which the aperture ratio of the radiator port is increased.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: December 1, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Naoya Kawamoto, Rihito Kaneko, Hirokazu Ando, Yusuke Niwa
  • Publication number: 20200358977
    Abstract: An object is to reduce a circuit scale in a solid-state imaging element that detects an address event. The solid-state imaging element is provided with a plurality of photoelectric conversion elements, a signal supply unit, and a detection unit. In this solid-state imaging element, each of the plurality of photoelectric conversion elements photoelectrically converts incident light to generate a first electric signal. Furthermore, in the solid-state imaging element, the detection unit detects whether or not a change amount of the first electric signal of each of the plurality of photoelectric conversion elements exceeds a predetermined threshold and outputs a detection signal indicating a result of the detection result.
    Type: Application
    Filed: January 18, 2019
    Publication date: November 12, 2020
    Inventors: Atsumi Niwa, Yusuke Oike
  • Publication number: 20200307607
    Abstract: A road surface condition estimation device includes a control circuit, an acquisition circuit and an estimation circuit. The control circuit is configured to control a driving device that is able to independently drive a plurality of wheels. The acquisition circuit is configured to acquire detection results of a plurality of wheel speed sensors that detects rotation speeds of the plurality of wheels respectively. The estimation circuit is configured to calculate a slip ratio for each driving wheel, based on a detection result of a first wheel speed sensor and a detection result of a second wheel sensor. The estimation circuit is configured to estimate a friction coefficient for each region on a road surface that corresponds to the driving wheel, based on the slip ratio.
    Type: Application
    Filed: March 10, 2020
    Publication date: October 1, 2020
    Applicants: AISIN SEIKI KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Hiroshi NOMA, Eiji NIWA, Hiroaki KAWASAKI, Yusuke MAEDA, Fumiharu OGAWA, Kazuhiro KATO
  • Patent number: 10598437
    Abstract: A hybrid metal melting furnace uses a furnace lid to hold molten metal, while inhibiting reduction in the service life of burners of the furnace lid caused by long periods of exposure to high heat. This hybrid metal melting furnace includes a crucible for accommodating metal to be melted; and an induction coil causing induced current to flow through and heat the metal. A furnace lid which closes an opening in the crucible includes: a first furnace lid having burners for injecting flames into the crucible; and a second furnace lid which does not have the burners. When melting the metal, the first furnace lid is disposed in a position in which the opening is closed. When holding the molten metal in the crucible, the first furnace lid is removed from the opening, and the second furnace lid is disposed in the position in which the opening is closed.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: March 24, 2020
    Assignee: AISIN TAKAOKA CO., LTD.
    Inventors: Kazufumi Niwa, Hiroaki Kato, Yusuke Wakita, Yuki Kiyanagi
  • Patent number: 10411296
    Abstract: To provide a structural body having a new shape and including a garnet crystal structure. A structural body comprising LiaM1bM2cOd (5?a?8; 2.5?b?3.5; 1.5?c?2.5; 10?d?14; M1 is at least one element selected from Al, Y, La, Pr, Nd, Sm, Lu, Mg, Ca, Sr, or Ba; and M2 is at least one element selected from Zr, Hf, Nb, or Ta) including a garnet crystal structure, wherein in a scanning electron microscopic image obtained through observation of a fracture surface in a depth direction of the structural body, a striped pattern extending along the depth direction is shown, and/or in a scanning electron microscopic image obtained through observation of a cut surface in the depth direction of the structural body, a continuous body extending along the depth direction is shown.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: September 10, 2019
    Assignees: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Japan Fine Ceramics Center
    Inventors: Yusuke Yamamoto, Junichi Niwa, Teiichi Kimura
  • Patent number: 10393437
    Abstract: The purpose of the present invention is to provide a melting material supply apparatus which is capable of contributing to improvements in the working environment and the melting efficiency of a metal melting furnace, and which is also capable of making melting work more efficient. This melting material supply apparatus for supplying a melting material to a crucible is provided with: a melting material supply unit for supplying the melting material to the crucible; and a furnace lid for closing an opening provided in the upper part of the crucible. The furnace lid is supported in a horizontal state by a furnace lid-supporter, and is capable of being moved between a position in which the opening is closed, and a standby position located above a hood. When the furnace lid is in the standby position, the opening is open, and the melting material can be supplied into the crucible therefrom.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: August 27, 2019
    Assignee: AISIN TAKAOKA CO., LTD.
    Inventors: Kazufumi Niwa, Hiroaki Kato, Yusuke Wakita, Yuki Kiyanagi
  • Patent number: 10331809
    Abstract: The deformation analysis device includes: a storage unit (12) which stores analysis data of a material; a state variable calculating unit (152) which calculates stresses and other state variables of respective elements of the material at each point in time of deformation of the material, based on the analysis data; a fracture determining unit (153) which, based on the calculated state variables, determines whether or not a fracture has occurred in each of the elements of the material, based on a fracture limit stress curve which is found in advance for the material; and a stress correcting unit (154) which, regarding an element in which it is determined that the fracture has occurred, out of the elements of the material, reduces ? by the following expression ?=(1?D)?? where ? is a stress with a rigidity decrease taken into consideration, D is a damage variable (note that 0?D?1) in continuum damage mechanics, and ?? is a stress with the rigidity decrease not taken into consideration, to thereby decrease rigidi
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: June 25, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Satoshi Hirose, Toshiyuki Niwa, Yusuke Tsunemi
  • Publication number: 20180266305
    Abstract: An engine cooling system includes a coolant circulation path, which circulates coolant between the water jacket and the radiator of an internal combustion engine, a pump, a control valve, which is provided in the coolant circulation path, and a controller. The controller executes a warming-up promotion control and a pressure relaxation control. In the pressure relaxation control, the controller controls the aperture ratio of the radiator port such that the lower the temperature of the radiator, the lower becomes the engine rotational speed at which the aperture ratio of the radiator port is increased.
    Type: Application
    Filed: February 5, 2018
    Publication date: September 20, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Naoya KAWAMOTO, Rihito KANEKO, Hirokazu ANDO, Yusuke NIWA
  • Patent number: 8899215
    Abstract: An EGR valve includes an aluminum valve body, an outer metal ring, an inner resin ring, a butterfly valve, and a seal ring. The valve body includes a gas passage therein. The gas passage is part of an EGR passage, through which EGR gas is returned from an exhaust passage to intake passage of an engine. The outer ring has a cylindrical shape, and is fixed and disposed on an inner wall of the gas passage. The inner ring has a cylindrical shape, and is disposed on an inner peripheral wall of the outer ring. The butterfly valve opens or closes an inside of the inner ring, and includes a seal fitting groove at an outer peripheral edge of the butterfly valve. The seal ring is fitted into the groove, and seals a clearance between the butterfly valve and the inner ring when the butterfly valve is closed.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: December 2, 2014
    Assignee: Denso Corporation
    Inventors: Ryo Sano, Yusuke Niwa, Tetsuji Yamanaka, Hiroki Shimada
  • Publication number: 20120247440
    Abstract: An EGR valve includes an aluminum valve body, an outer metal ring, an inner resin ring, a butterfly valve, and a seal ring. The valve body includes a gas passage therein. The gas passage is part of an EGR passage, through which EGR gas is returned from an exhaust passage to intake passage of an engine. The outer ring has a cylindrical shape, and is fixed and disposed on an inner wall of the gas passage. The inner ring has a cylindrical shape, and is disposed on an inner peripheral wall of the outer ring. The butterfly valve opens or closes an inside of the inner ring, and includes a seal fitting groove at an outer peripheral edge of the butterfly valve. The seal ring is fitted into the groove, and seals a clearance between the butterfly valve and the inner ring when the butterfly valve is closed.
    Type: Application
    Filed: March 27, 2012
    Publication date: October 4, 2012
    Applicant: DENSO CORPORATION
    Inventors: Ryo SANO, Yusuke Niwa, Tetsuji Yamanaka, Hiroki Shimada
  • Patent number: 7793631
    Abstract: A fuel ignition system for an internal combustion engine is disclosed. The fuel ignition system is adapted to allow a photocatalyst to ignite a mixture by using a light energy irradiated from a light generator. The fuel ignition system includes: a combustion chamber; the photocatalyst provided in the combustion chamber; and a light generator for flatly irradiating the light energy to the photocatalyst.
    Type: Grant
    Filed: August 21, 2006
    Date of Patent: September 14, 2010
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yusuke Niwa, Masaharu Matsumoto
  • Publication number: 20090260592
    Abstract: A fuel ignition system for an internal combustion engine is disclosed. The fuel ignition system is adapted to allow a photocatalyst to ignite a mixture by using a light energy irradiated from a light generator. The fuel ignition system includes: a combustion chamber; the photocatalyst provided in the combustion chamber; and a light generator for flatly irradiating the light energy to the photocatalyst.
    Type: Application
    Filed: August 21, 2006
    Publication date: October 22, 2009
    Inventors: Yusuke Niwa, Masaharu Matsumoto
  • Publication number: 20090035711
    Abstract: A photocatalytic ignition system is provided that basically comprises an ignition chamber, a photocatalyst and a light source. The ignition chamber is configured to receive an air fuel mixture. The photocatalyst is arranged in the ignition chamber to contact an air fuel mixture. The light source is arranged to shine light on the photocatalyst. The photocatalyst includes a photocatalytic material having an oxygen absorbing and a desorbing function. The photocatalytic ignition system is capable of igniting a lean air fuel mixture with a greatly reduced amount of light energy.
    Type: Application
    Filed: July 15, 2008
    Publication date: February 5, 2009
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yusuke NIWA, Katsuo SUGA
  • Publication number: 20090020410
    Abstract: Disclosed is a photocatalyst activation system characterized by including (a) a catalyst which includes a photocatalytic material containing cerium oxide, or a catalyst which includes a photocatalytic material containing at least one oxide selected from the group consisting of transition metal oxides other than cerium oxide; (b) a light source which irradiates the catalyst with light; and (c) a heat transfer device which transfers heat to the catalyst. By this photocatalyst activation system, it is possible to widen a usable wavelength range of light, and to enhance the catalytic activity to a large extent.
    Type: Application
    Filed: March 1, 2007
    Publication date: January 22, 2009
    Inventors: Yusuke Niwa, Kenjiro Matsushita, kouji Masuda, Kazunari Domen, Kentaro Teramura
  • Publication number: 20080098973
    Abstract: The disclosure relates to a photoconductive ignition system including a photoconductor configured to contact an oxidant-fuel gas mixture, and a light source providing irradiating light to a surface of the photoconductor. The photoconductor absorbs at least some of the light from the light source, which causes a variation in electrical potential at the surface of the photoconductor, thereby igniting the oxidant-fuel gas mixture. The disclosure further relates to a method of activating an oxidant-fuel gas mixture by exposing a photoconductor surface to the gas mixture and irradiating the surface with a light source emitting light at a wavelength corresponding to an energy level greater than a band gap energy level of the photoconductor, thereby activating the gas mixture in a combustion reaction.
    Type: Application
    Filed: March 17, 2006
    Publication date: May 1, 2008
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yusuke Niwa, Kenjiro Matsushita, Teruyoshi Mihara, Kohji Masuda, Hiroyuki Kaneko, Norihiko Kiritani
  • Patent number: 7134272
    Abstract: An exhaust gas purifying system includes, an internal combustion engine, an exhaust passage of exhaust gas from the internal combustion engine, a hydrogen-catalyst provided in the exhaust passage, an NOx purifying catalyst provided on a downstream of the hydrogen-catalyst of the exhaust passage to reduce nitrogen oxides, and a control unit. The hydrogen-catalyst has a function of transmitting or generating hydrogen. In the purifying system, the control unit executes enrichment condition control for reducing an air/fuel ratio (A/F)r during enrichment to prolong a time of enrichment (tr) as a flow rate of exhaust gas emitted from the internal combustion engine is lowered in intermittent enrichment of the air/fuel ratio.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: November 14, 2006
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yusuke Niwa, Junji Ito
  • Publication number: 20030167752
    Abstract: An exhaust gas purifying system includes, an internal combustion engine, an exhaust passage of exhaust gas from the internal combustion engine, a hydrogen-catalyst provided in the exhaust passage, an NOx purifying catalyst provided on a downstream of the hydrogen-catalyst of the exhaust passage to reduce nitrogen oxides, and a control unit. The hydrogen-catalyst has a function of transmitting or generating hydrogen. In the purifying system, the control unit executes enrichment condition control for reducing an air/fuel ratio (A/F)r during enrichment to prolong a time of enrichment (tr) as a flow rate of exhaust gas emitted from the internal combustion engine is lowered in intermittent enrichment of the air/fuel ratio.
    Type: Application
    Filed: February 19, 2003
    Publication date: September 11, 2003
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yusuke Niwa, Junji Ito