Patents by Inventor Yasunori Niiyama

Yasunori Niiyama 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: 10914342
    Abstract: A sliding member includes: a base material; a solid lubricant layer arranged on a surface of the base material; a defect layer having a material defect, disposed in the solid lubricant layer, and being changeable into an ultra low friction layer by mechanical stress more easily than changing from the solid lubricant layer to the ultra low friction layer; and a ultra low friction layer covering a surface of the defect layer.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: February 9, 2021
    Assignees: DENSO CORPORATION, TOHOKU UNIVERSITY, TOCALO CO., LTD.
    Inventors: Kentaro Kishi, Yasunori Niiyama, Koshi Adachi, Shinya Miki
  • Publication number: 20200318865
    Abstract: A thermomagnetic cycle device includes: a magneto-caloric element; a magnetic field modulation device that modulates an external magnetic field applied to the magneto-caloric element; a heat transport device that generates a both-way flow of heat transport medium; a phase controller that adjusts a phase difference between a magnetic field phase of change in the external magnetic field generated by the magnetic field modulation device and a flow phase of the both-way flow generated by the heat transport device; and a control device that controls the phase controller. The control device includes: a phase acquisition part that acquires the flow phase of the both-way flow of the heat transport medium or a reaction phase represented by change in heat emitted or absorbed by the magneto-caloric element; and a control part that controls the phase controller based on the flow phase or the reaction phase.
    Type: Application
    Filed: April 25, 2017
    Publication date: October 8, 2020
    Inventors: Yasunori NIIYAMA, Kazuki IWAYA, Akito TORII, Tomoyuki NOMURA, Shunji ITOU
  • Publication number: 20200072509
    Abstract: A device comprises an element bed providing a plurality of unit channels each containing an NICE element. The heat transport device has a channel switching mechanism and a biasing mechanism. The channel switching mechanism forms an inlet valve for allowing the heat transport medium to flow into the unit channel and an outlet valve for allowing the heat transport medium to flow out of the unit channel. The biasing mechanism applies different biasing forces to the inlet valve and the outlet valve. The magnitude relationship of the biasing force is the same as the magnitude relationship between the pressure of the heat transport medium acting on the inlet valve and the pressure of the heat transport medium acting on the outlet valve.
    Type: Application
    Filed: August 19, 2019
    Publication date: March 5, 2020
    Inventors: Kentaro KISHI, Yasunori NIIYAMA
  • Publication number: 20190195281
    Abstract: A sliding member includes: a base material; a solid lubricant layer arranged on a surface of the base material; a defect layer having a material defect, disposed in the solid lubricant layer, and being changeable into an ultra low friction layer by mechanical stress more easily than changing from the solid lubricant layer to the ultra low friction layer; and a ultra low friction layer covering a surface of the defect layer.
    Type: Application
    Filed: December 21, 2018
    Publication date: June 27, 2019
    Inventors: Kentaro KISHI, Yasunori NIIYAMA, Koshi ADACHI, Shinya MIKI
  • Patent number: 10295228
    Abstract: A controller is configured to, based on a characteristic information of thermal output with respect to a temperature difference between a hot end and a cold end of a working chamber, changes at least one of a flow rate of a heating target fluid in a high temperature heat exchanger and a flow rate of a cooling target fluid in a low temperature heat exchanger. At least one of the flow rate of the heating target fluid in the high temperature heat exchanger and the flow rate of the cooling target fluid in the low temperature heat exchanger is adjusted such that the temperature difference between the hot and cold ends changes in a direction that increases thermal output.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: May 21, 2019
    Assignee: DENSO CORPORATION
    Inventors: Naoki Watanabe, Shigeo Nomura, Akito Torii, Tsuyoshi Morimoto, Takayuki Sugiura, Tomoyuki Nomura, Yasunori Niiyama
  • Publication number: 20170059215
    Abstract: A controller is configured to, based on a characteristic information of thermal output with respect to a temperature difference between a hot end and a cold end of a working chamber, changes at least one of a flow rate of a heating target fluid in a high temperature heat exchanger and a flow rate of a cooling target fluid in a low temperature heat exchanger. At least one of the flow rate of the heating target fluid in the high temperature heat exchanger and the flow rate of the cooling target fluid in the low temperature heat exchanger is adjusted such that the temperature difference between the hot and cold ends changes in a direction that increases thermal output.
    Type: Application
    Filed: August 30, 2016
    Publication date: March 2, 2017
    Inventors: Naoki WATANABE, Shigeo NOMURA, Akito TORII, Tsuyoshi MORIMOTO, Takayuki SUGIURA, Tomoyuki NOMURA, Yasunori NIIYAMA
  • Patent number: 8707695
    Abstract: A heat engine includes a container in which a liquid piston made of a liquid operation fluid is sealed to flow therein, an exterior evaporator located outside of the container to generate vapor of the operation fluid, a suction portion arranged at one end side of the container to draw the vapor generated in the exterior evaporator into the container, an expansion portion in which the vapor drawn into the container is expanded to cause a displacement of the liquid piston, an output portion arranged at the other end side of the container to convert the displacement of the liquid piston to a mechanical energy, a liquid piston discharge portion for discharging a part of the liquid operation fluid as the liquid piston from the container, and a vapor discharge portion configured to discharge the vapor without being condensed in the container to outside of the container.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: April 29, 2014
    Assignee: Denso Corporation
    Inventors: Yasunori Niiyama, Shinichi Yatsuzuka, Tsuyoshi Morimoto, Kentarou Fukuda
  • Patent number: 8171730
    Abstract: An external combustion engine provided with a pipe-shaped main container with a heating portion and a cooling portion, an output part converting displacement of the liquid part of said working fluid generated due to the change in volume of said working fluid accompanying generation and condensation of said steam to mechanical energy for output, a venturi provided at a communicating part of the main container and an auxiliary container, a communicating member forming a communicating passage bypassing the venturi and communicating the main container and the auxiliary container, and a shutting means for closing the communicating passage at the time of normal operation and opening the communicating passage at the time of startup, wherein at the time of startup, the pressure loss at the communicating passage becomes smaller than a saturated steam pressure at the temperature of the heating portion.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: May 8, 2012
    Assignee: Denso Corporation
    Inventors: Shuzo Oda, Shinichi Yatsuzuka, Yasunori Niiyama, Takashi Kaneko
  • Patent number: 8112981
    Abstract: An external combustion engine comprising a pipe-shaped main container in which a working fluid is sealed flowably in a liquid state, a heated part formed at a location of one end of the main container and heating part of the working fluid in the main container in order to make it evaporate, a cooled part formed at a location next to the heated part toward the other end of the main container and cooling the vapor of the working fluid evaporated at the heated part in order to make it condense, an output unit communicated with the other end of the main container and converting the displacement of the liquid phase part of the working fluid to mechanical energy for output, and a controller alternately performing a heat storage mode making displacement of the liquid phase part of the working fluid stop in order to make the heated part store heat and an output mode allowing displacement of the liquid phase part of the working fluid and taking output from the output unit.
    Type: Grant
    Filed: January 19, 2009
    Date of Patent: February 14, 2012
    Assignee: Denso Corporation
    Inventors: Shuzo Oda, Shinichi Yatsuzuka, Yasunori Niiyama, Takashi Kaneko, Mamoru Shimoda
  • Publication number: 20110308774
    Abstract: An apparatus of a heat transfer circuit in which a heat transfer fluid with small particles circulates includes a container and an agitator. The container is located in a lower position of the apparatus in a vertical direction and defines a chamber where the heat transfer liquid passes when circulating in the heat transfer circuit. The agitator is located in the chamber to agitate the heat transfer fluid.
    Type: Application
    Filed: June 15, 2011
    Publication date: December 22, 2011
    Applicant: DENSO CORPORATION
    Inventors: Rie Fukuta, Yoshimasa Hijikata, Shinichi Yatsuzuka, Yoshiyasu Yamada, Touru Kawaguchi, Yasunori Niiyama, Kentarou Fukuda
  • Patent number: 8020380
    Abstract: An external combustion engine alternately repeating a first stroke of making a working fluid evaporate at a plurality of heating portions and making a liquid phase part of the working fluid displace toward an output part side and a second stroke of making the working fluid evaporated at the first stroke condense at the plurality of cooling portions and making the liquid phase part of the working fluid displace toward the side of the plurality of the heating portions and provided with inflow adjusting means for reducing differences in inflows among the plurality of the heating portions, wherein the inflow is defined as the amount of a liquid phase part of the working fluid flowing into the heating portions when the liquid phase part of the working fluid displaces from the output part side to the side of the plurality of the heating portions in the second stroke.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: September 20, 2011
    Assignee: Denso Corporation
    Inventors: Shuzo Oda, Shinichi Yatsuzuka, Yasunori Niiyama, Takashi Kaneko, Shunji Okemoto
  • Publication number: 20110219765
    Abstract: A heat engine includes a container in which a liquid piston made of a liquid operation fluid is sealed to flow therein, an exterior evaporator located outside of the container to generate vapor of the operation fluid, a suction portion arranged at one end side of the container to draw the vapor generated in the exterior evaporator into the container, an expansion portion in which the vapor drawn into the container is expanded to cause a displacement of the liquid piston, an output portion arranged at the other end side of the container to convert the displacement of the liquid piston to a mechanical energy, a liquid piston discharge portion for discharging a part of the liquid operation fluid as the liquid piston from the container, and a vapor discharge portion configured to discharge the vapor without being condensed in the container to outside of the container.
    Type: Application
    Filed: March 8, 2011
    Publication date: September 15, 2011
    Applicant: DENSO CORPORATION
    Inventors: Yasunori Niiyama, Shinichi Yatsuzuka, Tsuyoshi Morimoto, Kentarou Fukuda
  • Patent number: 7987670
    Abstract: In a steam engine having multiple main containers, first and second communication pipes are arranged in parallel to each other for respectively communication an auxiliary container with the main containers. Restricted portions and a first switching device are formed in the first communication pipe. The first communication pipe is closed during a start-up step of a starting operation of the engine, in order to prevent that an excess amount of working fluid may flow back from the auxiliary container to the main containers. As a result, a start-up time can be reduced.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: August 2, 2011
    Assignee: Denso Corporation
    Inventors: Shuzo Oda, Shinichi Yatsuzuka, Yasunori Niiyama, Takashi Kaneko
  • Patent number: 7779632
    Abstract: An external combustion engine 10 is disclosed, wherein a container 11 sealed with a working medium adapted to flow in a liquid state includes a heating unit 13 for generating a vapor of the working medium 12 by heating part of the working medium, and a cooling unit 14 for liquefying by cooling the vapor. The volume of the working medium 12 is changed by the generation and liquefaction of the vapor, and the displacement of the liquid portion of the working medium 12 caused by the volume change of the working medium 12 is converted into and output as mechanical energy. The heating unit 13 is structured so that inner members 51a, 53a arranged on the inside and outer members 51b, 53b arranged on the outside are bonded to each other. The outer members 51b, 53b are made of a second material higher in heat resistance than the first material of the inner members 51a, 53a. Further, the thickness of the inner members 51a, 53a is not smaller than the thermal penetration depth ? of the first material.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: August 24, 2010
    Assignee: DENSO Corporation
    Inventors: Yasunori Niiyama, Shinichi Yatsuzuka, Takashi Kaneko, Shuzo Oda, Katsuya Komaki
  • Patent number: 7716928
    Abstract: An external combustion engine includes: a main container sealed with a working fluid in a liquid state adapted to flow; a heater for heating a portion of the working fluid in the main container and generating the vapor of the working fluid; a cooler for cooling and liquefying the vapor; an output unit for outputting by converting the displacement of the liquid portion of the working fluid generated by the volume change of the working fluid due to the generation and liquefaction of the vapor into mechanical energy; and an auxiliary container communicating with the main container. The heater, the cooler and the output unit are arranged in order, in the direction of displacement of the working fluid. The working fluid is sealed in the auxiliary container which communicates with the portion of the main container nearer the output unit than the cooler.
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: May 18, 2010
    Assignee: Denso Corporation
    Inventors: Shuzo Oda, Shinichi Yatsuzuka, Yasunori Niiyama, Katsuya Komaki, Takashi Kaneko
  • Patent number: 7669415
    Abstract: An external combustion engine provided with a plurality of evaporators and stabilized in output and efficiency, that is, an engine provided with at least one main container, a plurality of evaporators heating the working medium to evaporate, condensers cooling the vapor of the working medium evaporated at the evaporators to make it condense, an output part communicated with the other end of the main container and converting displacement of a liquid part of the working medium occurring due to fluctuations in volume of the working medium accompanying evaporation and condensation of the working medium to mechanical energy for output, a single main container pressure adjusting means adjusting an internal pressure of the main container, and controlling means for controlling the main container pressure adjusting means based on a lowest temperature in the temperatures of the plurality of evaporators constituting a minimum evaporator temperature.
    Type: Grant
    Filed: January 28, 2008
    Date of Patent: March 2, 2010
    Assignee: Denso Corporation
    Inventors: Katsuya Komaki, Shinichi Yatsuzuka, Yasunori Niiyama
  • Patent number: 7644582
    Abstract: An external combustion engine including a container 10 sealed with a working medium 14 in liquid phase adapted to flow, a multiplicity of evaporators 201 to 204 for heating and evaporating part of the liquid-phase working medium 14, a multiplicity of condensers 221 to 224 for cooling and condensing the working medium 14 evaporated in the evaporators 201 to 204, and an output unit 11 for outputting by converting the displacement of the liquid-phase portion of the working medium 14 into mechanical energy. The multiplicity of the evaporators 201 to 204 share a heat source from which heat is supplied thereto.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: January 12, 2010
    Assignee: Denso Corporation
    Inventors: Shinichi Yatsuzuka, Yasunori Niiyama, Shuzo Oda, Katsuya Komaki
  • Publication number: 20090223216
    Abstract: An external combustion engine provided with a pipe-shaped main container with a heating portion and a cooling portion, an output part converting displacement of the liquid part of said working fluid generated due to the change in volume of said working fluid accompanying generation and condensation of said steam to mechanical energy for output, a venturi provided at a communicating part of the main container and an auxiliary container, a communicating member forming a communicating passage bypassing the venturi and communicating the main container and the auxiliary container, and a shutting means for closing the communicating passage at the time of normal operation and opening the communicating passage at the time of startup, wherein at the time of startup, the pressure loss at the communicating passage becomes smaller than a saturated steam pressure at the temperature of the heating portion.
    Type: Application
    Filed: March 3, 2009
    Publication date: September 10, 2009
    Applicant: DENSO CORPORATION
    Inventors: Shuzo Oda, Shinichi Yatsuzuka, Yasunori Niiyama, Takashi Kaneko
  • Publication number: 20090223222
    Abstract: An external combustion engine comprising a pipe-shaped main container in which a working fluid is sealed flowably in a liquid state, a heated part formed at a location of one end of the main container and heating part of the working fluid in the main container in order to make it evaporate, a cooled part formed at a location next to the heated part toward the other end of the main container and cooling the vapor of the working fluid evaporated at the heated part in order to make it condense, an output unit communicated with the other end of the main container and converting the displacement of the liquid phase part of the working fluid to mechanical energy for output, and a controller alternately performing a heat storage mode making displacement of the liquid phase part of the working fluid stop in order to make the heated part store heat and an output mode allowing displacement of the liquid phase part of the working fluid and taking output from the output unit.
    Type: Application
    Filed: January 19, 2009
    Publication date: September 10, 2009
    Applicant: DENSO CORPORATION
    Inventors: Shuzo Oda, Shinichi Yatsuzuka, Yasunori Niiyama, Takashi Kaneko, Mamoru Shimoda
  • Publication number: 20090223223
    Abstract: In a steam engine having multiple main containers, first and second communication pipes are arranged in parallel to each other for respectively communication an auxiliary container with the main containers. Restricted portions and a first switching device are formed in the first communication pipe. The first communication pipe is closed during a start-up step of a starting operation of the engine, in order to prevent that an excess amount of working fluid may flow back from the auxiliary container to the main containers. As a result, a start-up time can be reduced.
    Type: Application
    Filed: January 15, 2009
    Publication date: September 10, 2009
    Applicant: DENSO CORPORATION
    Inventors: Shuzo Oda, Shinichi Yatsuzuka, Yasunori Niiyama, Takashi Kaneko