Patents by Inventor Kazuhiro KUJIRAI

Kazuhiro KUJIRAI 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).

  • Fuel temperature estimation device
    Patent number: 9970827
    Abstract: A fuel temperature estimation device that can improve the estimation accuracy of a fuel temperature in each part of a fuel channel, is provided. In the invention, the fuel temperature estimation device estimates the fuel temperature of each part of the fuel channel in a vehicle (for example, an injection nozzle, a pressure accumulator, a high-pressure pump), and includes a flow rate measuring device that measures a fuel flow rate of a fuel return system of the fuel channel and a controller. The controller includes a fuel temperature correction unit that corrects an estimated fuel temperature in a fuel injection system based on the fuel flow rate of the fuel return system, and has a function of estimating the fuel temperature using the fuel flow rate of the fuel return system as a parameter.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: May 15, 2018
    Assignee: VOLVO TRUCK CORPORATION
    Inventors: Shigemi Kobayashi, Kazuhiro Kujirai, Masahiro Misawa, Takafumi Amano, Yousuke Aoyama
  • FUEL TEMPERATURE ESTIMATION DEVICE
    Publication number: 20150276505
    Abstract: A fuel temperature estimation device that can improve the estimation accuracy of a fuel temperature in each part of a fuel channel, is provided. In the invention, the fuel temperature estimation device estimates the fuel temperature of each part of the fuel channel in a vehicle (for example, an injection nozzle, a pressure accumulator, a high-pressure pump), and includes a flow rate measuring device that measures a fuel flow rate of a fuel return system of the fuel channel and a controller. The controller includes a fuel temperature correction unit that corrects an estimated fuel temperature in a fuel injection system based on the fuel flow rate of the fuel return system, and has a function of estimating the fuel temperature using the fuel flow rate of the fuel return system as a parameter.
    Type: Application
    Filed: June 9, 2015
    Publication date: October 1, 2015
    Inventors: Shigemi KOBAYASHI, Kazuhiro KUJIRAI, Masahiro MISAWA, Takafumi AMANO, Yousuke AOYAMA