Patents by Inventor Haruhiko Kato

Haruhiko Kato 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).

  • Water control for a fuel cell system
    Patent number: 6790550
    Abstract: A fuel cell system includes a heat-generation amount detection device for detecting a heat generation amount in a fuel cell, and an evaporation amount controller for controlling an evaporation amount of water in the fuel cell based on the detected heat generation amount. The heat generation amount is detected based on an output electric power of the fuel cell, an output current thereof or a temperature thereof. The evaporation amount of water in the fuel cell is controlled by adjusting at least one humidification amount of hydrogen and oxygen to be supplied to the fuel cell, or by adjusting at least one flow amount of hydrogen and oxygen to be supplied to the fuel cell.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: September 14, 2004
    Assignee: Denso Corporation
    Inventors: Tomonori Imamura, Toshiyuki Kawai, Haruhiko Kato, Kunio Okamoto
  • Fuel cell system including fuel cell for generating electric energy by chemical reaction between hydrogen and oxygen
    Patent number: 6569552
    Abstract: A fuel cell system includes a fuel cell (FC stack), an inflow passage valve provided in a hydrogen inflow passage through which hydrogen is supplied to the FC stack, and a discharge passage valve provided in a hydrogen discharge passage through which hydrogen containing gas is discharged from the FC stack as exhaust gas. In the fuel cell, hydrogen is supplied to the FC stack intermittently in accordance with an amount of hydrogen consumed in the FC stack, by controlling opening and closing of the inflow passage valve and the hydrogen discharge valve.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: May 27, 2003
    Assignee: Denso Corporation
    Inventors: Haruhiko Kato, Naoto Hotta, Kunio Okamoto, Tadayoshi Terao, Kiyoshi Kawaguchi, Masanori Uehara
  • Fuel cell system
    Publication number: 20020150802
    Abstract: A fuel cell system includes a heat-generation amount detection device for detecting a heat generation amount in a fuel cell, and an evaporation amount controller for controlling an evaporation amount of water in the fuel cell based on the detected heat generation amount. The heat generation amount is detected based on an output electric power of the fuel cell, an output current thereof or a temperature thereof. The evaporation amount of water in the fuel cell is controlled by adjusting at least one humidification amount of hydrogen and oxygen to be supplied to the fuel cell, or by adjusting at least one flow amount of hydrogen and oxygen to be supplied to the fuel cell.
    Type: Application
    Filed: April 10, 2002
    Publication date: October 17, 2002
    Inventors: Tomonori Imamura, Toshiyuki Kawai, Haruhiko Kato, Kunio Okamoto
  • Fuel cell system including fuel cell for generating electric energe by chemical reaction between hydrogen and oxygen
    Publication number: 20010018142
    Abstract: A fuel cell system includes a fuel cell (FC stack), an inflow passage valve provided in a hydrogen inflow passage through which hydrogen is supplied to the FC stack, and a discharge passage valve provided in a hydrogen discharge passage through which hydrogen containing gas is discharged from the FC stack as exhaust gas. In the fuel cell, hydrogen is supplied to the FC stack intermittently in accordance with an amount of hydrogen consumed in the FC stack, by controlling opening and closing of the inflow passage valve and the hydrogen discharge valve.
    Type: Application
    Filed: February 15, 2001
    Publication date: August 30, 2001
    Inventors: Haruhiko Kato, Naoto Hotta, Kunio Okamoto, Tadayoshi Terao, Kiyoshi Kawaguchi, Masanori Uehara