Patents by Inventor Norikazu Higashiyama

Norikazu Higashiyama 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).

  • Abnormality diagnosis apparatus and method for water temperature sensor
    Patent number: 7524106
    Abstract: There are occasions when an intermittent abnormality occurs in a water temperature sensor that is of a type that does not cause a sudden change in a detection value of the water temperature sensor. The movement of the detection value of the water temperature sensor when this type of abnormality occurs may be, for example, a movement in which the detection value of the water temperature sensor becomes lower even through warm up has been proceeding after engine start up has begun. When this type of movement of the detection value occurs, if the detection value of the water temperature sensor reduces, after engine start up has begun, to a value lower than that when start up began, it is immediately determined based on this fact that an abnormality of the water temperature sensor is occurring.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: April 28, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Norikazu Higashiyama, Koichi Satoya, Koichi Mizutani
  • Abnormality diagnosis apparatus and method for water temperature sensor
    Publication number: 20060093014
    Abstract: There are occasions when an intermittent abnormality occurs in a water temperature sensor that is of a type that does not cause a sudden change in a detection value of the water temperature sensor. The movement of the detection value of the water temperature sensor when this type of abnormality occurs may be, for example, a movement in which the detection value of the water temperature sensor becomes lower even through warm up has been proceeding after engine start up has begun. When this type of movement of the detection value occurs, if the detection value of the water temperature sensor reduces, after engine start up has begun, to a value lower than that when start up began, it is immediately determined based on this fact that an abnormality of the water temperature sensor is occurring.
    Type: Application
    Filed: October 28, 2005
    Publication date: May 4, 2006
    Inventors: Norikazu Higashiyama, Koichi Satoya, Koichi Mizutani