Patents by Inventor Isamu Toshimitsu

Isamu Toshimitsu 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: 7085643
    Abstract: In a device for estimating an amount of intake air of an internal combustion engine, wherein an amount of intake air passing through the throttle valve is calculated by using of an upstream side intake air pressure upstream of the throttle valve and a downstream side intake air pressure downstream of the throttle valve, and an amount of intake air supplied into the cylinder is estimated on the basis of the amount of intake air passing through the throttle valve, the upstream side intake air pressure used at the time when the amount of intake air passing through the throttle valve is calculated is detected or calculated to take account of a pressure loss, produced by at least an air-cleaner, from the atmospheric pressure.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: August 1, 2006
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Harufumi Muto, Isamu Toshimitsu, Takahiro Anami
  • Patent number: 7069139
    Abstract: A control device for an internal combustion engine comprises an air flow meter arranged in the intake passage. The air flow meter includes a main passage and a bypass passage and detects a flow rate of air flowing through the bypass passage to detect a flow rate of air flowing through an intake passage. A current intake air flow rate is calculated based on a current throttle opening. When the rapid acceleration of the engine is in process, an air flow meter-detecting intake air flow rate, assuming that air flows through the intake passage at the current intake air flow rate, is estimated considering the pressure loss of the bypass passage of the air flow meter. When an operation other than the rapid acceleration is in process, it is estimated ignoring the pressure loss. The fuel injection amount is calculated from the estimated air flow meter-detecting intake air flow rate.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: June 27, 2006
    Assignees: Toyota Jidosha Kabushiki Kaisha, Denso Corporation
    Inventors: Harufumi Muto, Satoshi Furukawa, Isamu Toshimitsu
  • Publication number: 20060100770
    Abstract: In a device for estimating an amount of intake air of an internal combustion engine, wherein an amount of intake air passing through the throttle valve is calculated by using of an upstream side intake air pressure upstream of the throttle valve and a downstream side intake air pressure downstream of the throttle valve, and an amount of intake air supplied into the cylinder is estimated on the basis of the amount of intake air passing through the throttle valve, the upstream side intake air pressure used at the time when the amount of intake air passing through the throttle valve is calculated is detected or calculated to take account of a pressure loss, produced by at least an air-cleaner, from the atmospheric pressure.
    Type: Application
    Filed: June 30, 2004
    Publication date: May 11, 2006
    Inventors: Harufumi Muto, Isamu Toshimitsu, Takahiro Anami
  • Publication number: 20060069491
    Abstract: A control device for an internal combustion engine comprises an air flow meter arranged in the intake passage. The air flow meter includes a main passage and a bypass passage and detects a flow rate of air flowing through the bypass passage to detect a flow rate of air flowing through an intake passage. A current intake air flow rate is calculated based on a current throttle opening. When the rapid acceleration of the engine is in process, an air flow meter-detecting intake air flow rate, assuming that air flows through the intake passage at the current intake air flow rate, is estimated considering the pressure loss of the bypass passage of the air flow meter. When an operation other than the rapid acceleration is in process, it is estimated ignoring the pressure loss. The fuel injection amount is calculated from the estimated air flow meter-detecting intake air flow rate.
    Type: Application
    Filed: September 20, 2005
    Publication date: March 30, 2006
    Applicants: Toyota Jidosha Kabushiki Kaisha, Denso Corporation
    Inventors: Harufumi Muto, Satoshi Furukawa, Isamu Toshimitsu