Patents by Inventor Takanori MATSUKAWA

Takanori MATSUKAWA 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).

  • Misfire detection device to detect misfire based on a frequency analysis of a rotation signal correlated with a rotational state of an internal combustion engine
    Patent number: 10139314
    Abstract: A rotation acquisition unit acquires a rotation signal correlated with a rotational state of an internal combustion engine. An analysis unit performs frequency analysis of the rotation signal acquired with the rotation acquisition unit. An inter-cylinder determination unit determines whether an inter-cylinder component is smaller than an inter-cylinder threshold representing occurrence of misfire. The inter-cylinder component is a frequency component of an inter-cylinder cycle. The inter-cylinder cycle is computed by dividing an ignition cycle, which is one burning cycle of the internal combustion engine, by a number of cylinders of the internal combustion engine.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: November 27, 2018
    Assignee: DENSO CORPORATION
    Inventors: Taiyo Hiroi, Daisuke Honda, Takanori Matsukawa, Takanobu Kajino
  • MISFIRE DETECTION DEVICE
    Publication number: 20170167952
    Abstract: A rotation acquisition unit acquires a rotation signal correlated with a rotational state of an internal combustion engine. An analysis unit performs frequency analysis of the rotation signal acquired with the rotation acquisition unit. An inter-cylinder determination unit determines whether an inter-cylinder component is smaller than an inter-cylinder threshold representing occurrence of misfire. The inter-cylinder component is a frequency component of an inter-cylinder cycle. The inter-cylinder cycle is computed by dividing an ignition cycle, which is one burning cycle of the internal combustion engine, by a number of cylinders of the internal combustion engine.
    Type: Application
    Filed: October 4, 2016
    Publication date: June 15, 2017
    Inventors: Taiyo HIROI, Daisuke HONDA, Takanori MATSUKAWA, Takanobu KAJINO