Patents by Inventor Hiroki KAKUI

Hiroki KAKUI 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: 11754011
    Abstract: An injection control device includes: a boost controller performing a boost switching control of a boost switch to charge a boost capacitor and supplying a boost power from a battery power supply; a boost voltage monitor monitoring the boost voltage; and a boost monitor timing controller setting a section from a predetermined time after an on-edge of the boost switch to an off-edge timing in a section monitor mode as a boost monitor section. The boost controller stops boosting by stopping the boost switching control when the boost voltage is equal to or higher than a boost stop threshold value in the boost monitor section.
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: September 12, 2023
    Assignee: DENSO CORPORATION
    Inventors: Masashi Inaba, Yusuke Shimizu, Hiroki Kakui
  • Publication number: 20210381457
    Abstract: An injection control device includes: a boost controller performing a boost switching control of a boost switch to charge a boost capacitor and supplying a boost power from a battery power supply; a boost voltage monitor monitoring the boost voltage; and a boost monitor timing controller setting a section from a predetermined time after an on-edge of the boost switch to an off-edge timing in a section monitor mode as a boost monitor section. The boost controller stops boosting by stopping the boost switching control when the boost voltage is equal to or higher than a boost stop threshold value in the boost monitor section.
    Type: Application
    Filed: June 4, 2021
    Publication date: December 9, 2021
    Inventors: Masashi INABA, Yusuke SHIMIZU, Hiroki KAKUI
  • Patent number: 10921214
    Abstract: An air-fuel ratio (A/F) sensor control device includes: an impedance detector detecting an impedance of an A/F sensor; and a pump current controller performing a digital control on a supply of electric current to the A/F sensor. The pump current controller includes a PID calculator calculating an instruction current value according to a difference of two input values, i.e., the difference between a PID control target value and a detection value of an inter-terminal voltage of a Nernst cell; and a protection clamper limiting a supply of electric current to a pump cell based on the instruction current value and the impedance.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: February 16, 2021
    Assignee: DENSO CORPORATION
    Inventors: Nobuyuki Tanaka, Hiroki Kakui, Yuji Iwama, Satoshi Nishimoto
  • Publication number: 20190017901
    Abstract: An air-fuel ratio (A/F) sensor control device includes: an impedance detector detecting an impedance of an A/F sensor; and a pump current controller performing a digital control on a supply of electric current to the A/F sensor. The pump current controller includes a PID calculator calculating an instruction current value according to a difference of two input values, i.e., the difference between a PID control target value and a detection value of an inter-terminal voltage of a Nernst cell; and a protection clamper limiting a supply of electric current to a pump cell based on the instruction current value and the impedance.
    Type: Application
    Filed: June 25, 2018
    Publication date: January 17, 2019
    Inventors: Nobuyuki TANAKA, Hiroki KAKUI, Yuji IWAMA, Satoshi NISHIMOTO