Patents by Inventor Toshio Douke

Toshio Douke 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).

  • Evaporation system leak diagnostic apparatus
    Patent number: 8950244
    Abstract: An evaporation system leak diagnostic apparatus that purges fuel vapor from a fuel tank into an intake system of an internal combustion engine via a canister, includes: a first closed system leak diagnostic unit that executes a leak diagnostic on a first closed system based on a tank internal pressure detected by a tank internal pressure detecting device while the first closed system is formed with a first closed system forming device; and a second closed system leak diagnostic unit that introduces pressure in the first closed system into a second closed system by forming a second closed system with a second closed system forming device, and executes a leak diagnostic on the second closed system based on the tank internal pressure detected by the tank internal pressure detecting device, after the leak diagnostic by the first closed system leak diagnostic unit.
    Type: Grant
    Filed: January 16, 2012
    Date of Patent: February 10, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yusaku Nishimura, Yoshihide Ogawa, Kazuhiro Minamitani, Satoshi Kawai, Toshio Douke, Yoshinori Ogaki
  • EVAPORATION SYSTEM LEAK DIAGNOSTIC APPARATUS
    Publication number: 20120186333
    Abstract: An evaporation system leak diagnostic apparatus that purges fuel vapor from a fuel tank into an intake system of an internal combustion engine via a canister, includes: a first closed system leak diagnostic unit that executes a leak diagnostic on a first closed system based on a tank internal pressure detected by a tank internal pressure detecting device while the first closed system is formed with a first closed system forming device; and a second closed system leak diagnostic unit that introduces pressure in the first closed system into a second closed system by forming a second closed system with a second closed system forming device, and executes a leak diagnostic on the second closed system based on the tank internal pressure detected by the tank internal pressure detecting device, after the leak diagnostic by the first closed system leak diagnostic unit.
    Type: Application
    Filed: January 16, 2012
    Publication date: July 26, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yusaku Nishimura, Yoshihide Ogawa, Kazuhiro Minamitani, Satoshi Kawai, Toshio Douke, Yoshinori Ogaki