Patents by Inventor Shintaro Minowa

Shintaro Minowa 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).

  • Degradation determining system and method for exhaust gas sensor, and engine control unit
    Patent number: 6792928
    Abstract: There is provided a degradation determining system for an exhaust gas sensor, which, even when unexpected changes occur in the air-fuel ratio during execution of air-fuel ratio control, can determine degradation of the sensor by suppressing adverse influence of noise caused by the changes on the output from the sensor, to thereby enhance the accuracy of the degradation determination. In the degradation determining system, a determining input signal IDSIN for determining the degradation of the sensor is generated, and a modulation output (u(k), DSMSGNS(k), us(k), or ud(k)) is generated by modulating the determining input signal IDSIN by using any one of the &Dgr;&Sgr; modulation algorithm, the &Sgr;&Dgr; modulation algorithm, and the &Dgr; modulation algorithm. Degradation of the sensor is determined based on the output KACT delivered from the sensor when the fuel injection amount is controlled based on the generated modulation output.
    Type: Grant
    Filed: November 7, 2003
    Date of Patent: September 21, 2004
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuji Yasui, Yosuke Ishikawa, Shintaro Minowa
  • Degradation determining system and method for exhaust gas sensor, and engine control unit
    Publication number: 20040094138
    Abstract: There is provided a degradation determining system for an exhaust gas sensor, which, even when unexpected changes occur in the air-fuel ratio during execution of air-fuel ratio control, can determine degradation of the sensor by suppressing adverse influence of noise caused by the changes on the output from the sensor, to thereby enhance the accuracy of the degradation determination. In the degradation determining system, a determining input signal IDSIN for determining the degradation of the sensor is generated, and a modulation output (u(k), DSMSGNS(k), us(k), or ud(k)) is generated by modulating the determining input signal IDSIN by using any one of the &Dgr;&Sgr; modulation algorithm, the &Sgr;&Dgr; modulation algorithm, and the &Dgr; modulation algorithm. Degradation of the sensor is determined based on the output KACT delivered from the sensor when the fuel injection amount is controlled based on the generated modulation output.
    Type: Application
    Filed: November 7, 2003
    Publication date: May 20, 2004
    Applicant: Honda Motor Co., Ltd.
    Inventors: Yuji Yasui, Yosuke Ishikawa, Shintaro Minowa