Patents by Inventor Yohei Suganuma

Yohei Suganuma 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: 11486328
    Abstract: An injection control device includes: an arithmetic unit that obtains a valve-closing time for stopping injection of fuel from a fuel injection valve based on a degree of variation in a time change of a voltage generated when the fuel injection valve is driven based on a required injection amount; an injection amount change unit that increases or decreases the required injection amount; and a learning unit that repeats injection control of the fuel to learn the valve-closing time obtained by the arithmetic unit.
    Type: Grant
    Filed: September 13, 2021
    Date of Patent: November 1, 2022
    Assignee: DENSO CORPORATION
    Inventors: Tomoki Mori, Kosuke Kato, Hiroyuki Fukuda, Yohei Suganuma
  • Patent number: 11448154
    Abstract: An injection control device of capable of correcting an energization time even in an S/N non-guaranteeable situation includes: an energization controller calculating an energization time correction amount based on an area correction performed by an energization time correction amount calculator regarding electric current flowing in a fuel injection valve when the fuel injection valve is electrically driven for injecting fuel; and an energization instruction time calculator correcting an energization instruction time for fuel injection in a next cycle and thereafter by using the energization instruction time correction amounts in or before a current cycle.
    Type: Grant
    Filed: May 26, 2021
    Date of Patent: September 20, 2022
    Assignee: DENSO CORPORATION
    Inventors: Yohei Suganuma, Masashi Inaba
  • Patent number: 11384704
    Abstract: An injection control device includes: a conversion coefficient setter setting a conversion coefficient for each injection when a fuel injection valve is driven by an electric current to inject fuel from the fuel injection valve; and an area correction unit calculating an energization time correction amount by performing area correction using the conversion coefficient for each injection regardless of whether a drive current of the fuel injection valve has reached a target peak current or not.
    Type: Grant
    Filed: May 26, 2021
    Date of Patent: July 12, 2022
    Assignee: DENSO CORPORATION
    Inventors: Yohei Suganuma, Ryohei Takahashi, Hiroyuki Fukuda, Masashi Inaba
  • Patent number: 11326545
    Abstract: An injection control device includes: a fuel injection quantity command value output unit that outputs a command value for a fuel injection quantity of a fuel injection valve; a fuel injection quantity correction unit that calculates an air-fuel correction amount and corrects the command value for the fuel injection quantity; and a controller that executes current control on the fuel injection valve. The controller executes current area correction by calculating an area correction amount for an energization time. The injection control device further includes a learning controller that stops the air-fuel learning.
    Type: Grant
    Filed: May 28, 2021
    Date of Patent: May 10, 2022
    Assignee: DENSO CORPORATION
    Inventors: Kosuke Kato, Yasumasa Ishikawa, Yohei Suganuma
  • Patent number: 11313308
    Abstract: An injection control device includes: a drive control unit that controls energization by correcting an energization instruction time when injecting the fuel by executing the current-drive, and includes an energization time correction amount calculation unit that calculates an energization time correction amount by performing area correction on a current flowing through the fuel injection valve; an abnormality determination unit that determines an abnormality in a control system of the drive control unit; and a correction amount subtraction setting unit that stops a calculation of the energization time correction amount when the abnormality determination unit determines an abnormality, and controls the drive control unit to directly or stepwise reduce the energization time correction amount at an abnormality determination.
    Type: Grant
    Filed: June 24, 2021
    Date of Patent: April 26, 2022
    Assignee: DENSO CORPORATION
    Inventors: Kazumasa Kanai, Yohei Suganuma, Hiroyuki Fukuda
  • Patent number: 11306675
    Abstract: In a current-driving of a fuel injection valve to inject fuel through a single injection or a multi-stage injection, an energization time correction amount is calculated by performing area correction on a current flowing through the fuel injection valve. The single injection is switched to the multi-stage injection when the single injection is consecutively performed under a predetermined condition.
    Type: Grant
    Filed: June 24, 2021
    Date of Patent: April 19, 2022
    Assignee: DENSO CORPORATION
    Inventors: Yuki Kato, Yohei Suganuma, Hiroyuki Fukuda
  • Publication number: 20220082060
    Abstract: An injection control device includes: an arithmetic unit that obtains a valve-closing time for stopping injection of fuel from a fuel injection valve based on a degree of variation in a time change of a voltage generated when the fuel injection valve is driven based on a required injection amount; an injection amount change unit that increases or decreases the required injection amount; and a learning unit that repeats injection control of the fuel to learn the valve-closing time obtained by the arithmetic unit.
    Type: Application
    Filed: September 13, 2021
    Publication date: March 17, 2022
    Inventors: Tomoki MORI, Kosuke KATO, Hiroyuki FUKUDA, Yohei SUGANUMA
  • Publication number: 20220034277
    Abstract: An injection control device includes a control IC that obtains, as sample data, a time change of a voltage generated when a fuel injection valve is driven, and determines a valve closing timing at which injection of fuel from the fuel injection valve is stopped by calculating a degree of variation from the sample data of the voltage. Further, the control IC changes the calculation of the degree of variation when a predetermined condition is satisfied.
    Type: Application
    Filed: July 28, 2021
    Publication date: February 3, 2022
    Inventors: Ryo FUKAYA, Yohei SUGANUMA
  • Publication number: 20220034278
    Abstract: An injection control device includes: an instruction output unit outputting an instruction energization time that is an instruction value of an energization time of a fuel injection valve corresponding to a target injection amount; an energization controller controlling energization of the fuel injection valve based on the instruction energization time; an area corrector correcting an area of an electric current flowing through the fuel injection valve when the fuel injection valve is driven by the electric current, calculating a correction time of the energization time, and correcting the instruction energization time; an abnormality determiner determining that an abnormality related to the area correction has occurred when the correction time reaches a predetermined upper limit value; and a normal-return determiner executing, after the abnormality determiner determines that the abnormality related to the area correction has occurred, a normal-return determination at an execution timing of when a degree of i
    Type: Application
    Filed: July 27, 2021
    Publication date: February 3, 2022
    Inventors: Minori KANEDA, Yohei SUGANUMA, Akira TACHIKI
  • Publication number: 20210404405
    Abstract: In a current-driving of a fuel injection valve to inject fuel through a single injection or a multi-stage injection, an energization time correction amount is calculated by performing area correction on a current flowing through the fuel injection valve. The single injection is switched to the multi-stage injection when the single injection is consecutively performed under a predetermined condition.
    Type: Application
    Filed: June 24, 2021
    Publication date: December 30, 2021
    Inventors: Yuki KATO, Yohei SUGANUMA, Hiroyuki FUKUDA
  • Publication number: 20210404408
    Abstract: An injection control device includes: a drive control unit that controls energization by correcting an energization instruction time when injecting the fuel by executing the current-drive, and includes an energization time correction amount calculation unit that calculates an energization time correction amount by performing area correction on a current flowing through the fuel injection valve; an abnormality determination unit that determines an abnormality in a control system of the drive control unit; and a correction amount subtraction setting unit that stops a calculation of the energization time correction amount when the abnormality determination unit determines an abnormality, and controls the drive control unit to directly or stepwise reduce the energization time correction amount at an abnormality determination.
    Type: Application
    Filed: June 24, 2021
    Publication date: December 30, 2021
    Inventors: KAZUMASA KANAI, YOHEI SUGANUMA, HIROYUKI FUKUDA
  • Publication number: 20210404411
    Abstract: An injection control device includes: a fuel injection quantity command value output unit that outputs a command value for a fuel injection quantity of a fuel injection valve; a fuel injection quantity correction unit that calculates an air-fuel correction amount and corrects the command value for the fuel injection quantity; and a controller that executes current control on the fuel injection valve. The controller executes current area correction by calculating an area correction amount for an energization time. The injection control device further includes a learning controller that stops the air-fuel learning.
    Type: Application
    Filed: May 28, 2021
    Publication date: December 30, 2021
    Inventors: Kosuke Kato, Yasumasa Ishikawa, Yohei Suganuma
  • Publication number: 20210372338
    Abstract: An injection control device includes: a conversion coefficient setter setting a conversion coefficient for each injection when a fuel injection valve is driven by an electric current to inject fuel from the fuel injection valve; and an area correction unit calculating an energization time correction amount by performing area correction using the conversion coefficient for each injection regardless of whether a drive current of the fuel injection valve has reached a target peak current or not.
    Type: Application
    Filed: May 26, 2021
    Publication date: December 2, 2021
    Inventors: Yohei SUGANUMA, Ryohei TAKAHASHI, Hiroyuki FUKUDA, Masashi INABA
  • Publication number: 20210372340
    Abstract: An injection control device of capable of correcting an energization time even in an S/N non-guaranteeable situation includes: an energization controller calculating an energization time correction amount based on an area correction performed by an energization time correction amount calculator regarding electric current flowing in a fuel injection valve when the fuel injection valve is electrically driven for injecting fuel; and an energization instruction time calculator correcting an energization instruction time for fuel injection in a next cycle and thereafter by using the energization instruction time correction amounts in or before a current cycle.
    Type: Application
    Filed: May 26, 2021
    Publication date: December 2, 2021
    Inventors: Yohei Suganuma, Masashi Inaba
  • Patent number: 11181067
    Abstract: An injection control device includes: a fuel injection quantity command value output unit that outputs a command value for a fuel injection quantity of a fuel injection valve; and a controller that executes current control on the fuel injection valve. The controller executes current area correction by calculating an area correction amount for an energization time to cause an integrated current value of an energization current profile and the integrated current value of a current to be equal to each other. Correction control of the current area correction is changed based on a detection signal of a cooling water temperature of an internal combustion engine.
    Type: Grant
    Filed: May 28, 2021
    Date of Patent: November 23, 2021
    Assignee: DENSO CORPORATION
    Inventors: Kosuke Kato, Yasumasa Ishikawa, Yohei Suganuma, Masashi Inaba