Patents by Inventor Toshihiro Aono

Toshihiro Aono 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: 10823104
    Abstract: The purpose of the present invention is to detect variations between the quantities of fuel injected into cylinders by fuel injection devices and correct the fuel injection quantity variation while minimizing the computational load on a drive device and the level of performance required of a pressure sensor. A drive device for fuel injection devices according to the present invention performs control wherein movable valves are driven so that predetermined quantities of fuel are injected by applying, for the duration of a set energization time, a current that will reach an energization current to solenoids of a plurality of fuel injection devices which open/close fuel flow paths. The drive device is characterized in that the set energization time or energization current is corrected on the basis of a pressure detection value from a pressure sensor that is attached to a fuel supply pipe disposed upstream of the plurality of fuel injection devices.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: November 3, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Ryo Kusakabe, Motoyuki Abe, Toshihiro Aono, Takashi Okamoto
  • Publication number: 20200300184
    Abstract: Provided is a control device for an internal combustion engine capable of estimating a compression ratio of the internal combustion engine at the time of fuel cut of the internal combustion engine and without being affected by an intake air amount and an intake air temperature. A compression ratio ? is calculated on the basis of a change of in-cylinder pressure P with respect to crank angle ? at timing when an in-cylinder volume change rate dV/d?/V takes an extreme value or at timing from closing of an intake valve 109 to the start of ignition of the air-fuel mixture in the cylinder.
    Type: Application
    Filed: January 31, 2018
    Publication date: September 24, 2020
    Inventors: Toshihiro AONO, Masayuki SARUWATARI
  • Publication number: 20200291914
    Abstract: Provided is a control device and a control method of a high-efficiency internal combustion engine capable of stabilizing combustion and suppressing NOx emissions without unnecessarily increasing a mounting load on an ECU. Therefore, the control device of the internal combustion engine for controlling the internal combustion engine includes an ignition plug that ignites an air-fuel mixture of fuel and air in the combustion chamber, a combustion pressure estimation sensor that detects a combustion pressure in the combustion chamber, and a crank angle sensor that detects a crank angle of a crankshaft. An MBT region is set based on an ignition delay period from an ignition timing of the ignition plug calculated from a detection value of the combustion pressure estimation sensor and a detection value of the crank angle sensor to a combustion start timing in the combustion chamber, and a combustion period from the combustion start timing to a set amount combustion end timing when a set amount of combustion ends.
    Type: Application
    Filed: December 11, 2018
    Publication date: September 17, 2020
    Inventors: Atsushi SHIMADA, Toshihiro AONO, Masayuki SARUWATARI
  • Patent number: 10677184
    Abstract: An object of the invention is to provide a drive device of a fuel injection device which can increase the accuracy in an injected fuel injection amount by combining the fuel injections from a plurality of injection pulse widths. In the drive device of the fuel injection device which has a function of driving the fuel injection device such that the fuel injection is performed plural times in one combustion cycle, the fuel injection device is driven such that a fuel injection at a target opening level in which a valve element or a movable element of the fuel injection device reaches a regulation member and a fuel injection at an intermediate opening level in which the valve element does not reach the regulation member are included in the plural times of division injections performed in one combustion cycle.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: June 9, 2020
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Ryo Kusakabe, Toshihiro Aono, Motoyuki Abe, Takuya Mayuzumi, Masahiro Toyohara, Takashi Okamoto, Osamu Mukaihara, Shinji Nakagawa, Yusuke Kihara
  • Publication number: 20190331052
    Abstract: The purpose of the present invention is to detect variations between the quantities of fuel injected into cylinders by fuel injection devices and correct the fuel injection quantity variation while minimizing the computational load on a drive device and the level of performance required of a pressure sensor. A drive device for fuel injection devices according to the present invention performs control wherein movable valves are driven so that predetermined quantities of fuel are injected by applying, for the duration of a set energization time, a current that will reach an energization current to solenoids of a plurality of fuel injection devices which open/close fuel flow paths. The drive device is characterized in that the set energization time or energization current is corrected on the basis of a pressure detection value from a pressure sensor that is attached to a fuel supply pipe disposed upstream of the plurality of fuel injection devices.
    Type: Application
    Filed: July 8, 2019
    Publication date: October 31, 2019
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Ryo KUSAKABE, Motoyuki ABE, Toshihiro AONO, Takashi OKAMOTO
  • Patent number: 10371084
    Abstract: A method for detecting variations between the quantities of fuel injected into cylinders by fuel injection devices and correcting the fuel injection quantity variation while minimizing the computational load on a drive device and the level of performance required of a pressure sensor includes a drive device for fuel injection control, wherein movable valves are driven so that predetermined quantities of fuel are injected by applying, for the duration of a set energization time, a current that will reach an energization current to solenoids of a plurality of fuel injection devices which open/close fuel flow paths. The drive device is characterized in that the set energization time or energization current is corrected on the basis of a pressure detection value from a pressure sensor that is attached to a fuel supply pipe disposed upstream of the plurality of fuel injection devices.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: August 6, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Ryo Kusakabe, Motoyuki Abe, Toshihiro Aono, Takashi Okamoto
  • Publication number: 20190218990
    Abstract: An electromagnetic valve control unit for detecting operation of an electromagnetic valve on the basis of a drive voltage or a drive current applied to the electromagnetic valve. The electromagnetic valve control unit includes an A/D converter, a filter, and a detection unit. The A/D converter converts the drive voltage or the drive current into a digital signal. The filter has a gain of about zero at a predetermined frequency. The detection unit detects operation of the electromagnetic valve on the basis of an output of the filter upon input of the digital signal into the filter.
    Type: Application
    Filed: February 4, 2019
    Publication date: July 18, 2019
    Inventors: Toshihiro AONO, Motoyuki ABE, Ryo KUSAKABE, Teppei HIROTSU, Ayumu HATANAKA, Hideyuki SAKAMOTO, Takao FUKUDA, Masahiro TOYOHARA, Osamu MUKAIHARA
  • Patent number: 10247125
    Abstract: The purpose of the present invention is to provide a fuel injection valve control device with which variability in the injection amount with respect to drive pulse width can be kept to a satisfactory level in each of a plurality of fuel injection devices. The present invention provides a fuel injection valve control device for controlling a plurality of fuel injection devices each equipped with a valve body and a solenoid for opening the valve body, characterized in that the device is configured such that, a prescribed time after voltage has been applied to the solenoid, a holding current is applied, the prescribed time and the holding current being corrected for each of the fuel injection devices, on the basis of the operating characteristics of the fuel injection device.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: April 2, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Toshihiro Aono, Motoyuki Abe, Masahiro Toyohara, Osamu Mukaihara
  • Patent number: 10240551
    Abstract: Provided are an electromagnetic valve control unit and a fuel injection control device using the same that can precisely detect a change of an operating state of an electromagnetic valve, that is, a valve opening time or a valve closing time of the electromagnetic valve, precisely correct a drive voltage or a drive current applied to the electromagnetic valve, and appropriately control opening/closing of the electromagnetic valve, with a simple configuration. In an electromagnetic valve control unit for controlling opening/closing of an electromagnetic valve by a drive voltage and a drive current to be applied, the drive voltage and the drive current applied to the electromagnetic valve are corrected on the basis of a detection time of an inflection point from time series data of the drive voltage and the drive current when the electromagnetic valve is opened/closed.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: March 26, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Toshihiro Aono, Motoyuki Abe, Ryo Kusakabe, Teppei Hirotsu, Ayumu Hatanaka, Hideyuki Sakamoto, Takao Fukuda, Masahiro Toyohara, Osamu Mukaihara
  • Publication number: 20180209366
    Abstract: A drive device capable of detecting individual variations of an injection quantity of a fuel injection device of each cylinder and adjusting a current waveform provided to an injection pulse width and a solenoid such that the individual variations of the fuel injection devices are reduced. The fuel injection device in the present invention includes a valve body that close a fuel passage by coming into contact with a valve seat and opens the fuel passage by separating from the valve seat and a magnetic circuit constructed of a solenoid, a fixed core, a nozzle holder a housing and a needle and when a current is supplied to the solenoid a magnetic suction force acts on the needle and the needle has a function to open the valve body by colliding against the valve body after performing a free running operation and changes of acceleration of the needle due to collision of the needle against the valve body are detected by a current flowing through the solenoid.
    Type: Application
    Filed: February 8, 2018
    Publication date: July 26, 2018
    Inventors: Ryo KUSAKABE, Motoyuki ABE, Ayumu HATANAKA, Toshihiro AONO, Teppei HIROTSU, Hideyuki SAKAMOTO, Masahiro TOYOHARA, Osamu MUKAIHARA, Takao FUKUDA, Yoshihito YASUKAWA, Akiyasu MIYAMOTO
  • Publication number: 20180209365
    Abstract: A set spring force is estimated with high precision and a drive waveform is corrected according to the results. A control device of a fuel injection device consists of an incorporation means of reading a drive voltage of a solenoid, an inflexion point extraction filter for filtering the drive voltage to highlight inflexion points, a means of selecting a later inflexion point or a means of calculating a temporal difference between a later inflexion point and an earlier inflexion point of the extracted inflexion points, and a drive current correction means of correcting a drive current parameter on the basis of timing of the selected, later inflexion point or a temporal difference between the inflexion points.
    Type: Application
    Filed: July 20, 2016
    Publication date: July 26, 2018
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Toshihiro AONO, Masahiro TOYOHARA, Osamu MUKAIHARA
  • Patent number: 9926874
    Abstract: A drive device capable of detecting individual variations of an injection quantity of a fuel injection device of each cylinder and adjusting a current waveform provided to an injection pulse width and a solenoid such that the individual variations of the fuel injection devices are reduced. The fuel injection device in the present invention includes a valve body that closes a fuel passage by coming into contact with a valve seat and opens the fuel passage by separating from the valve seat and a magnetic circuit constructed of a solenoid, a fixed core, a nozzle holder, a housing, and a needle and when a current is supplied to the solenoid, a magnetic suction force acts on the needle and the needle has a function to open the valve body by colliding against the valve body after performing a free running operation and changes of acceleration of the needle due to collision of the needle against the valve body are detected by a current flowing through the solenoid.
    Type: Grant
    Filed: July 29, 2013
    Date of Patent: March 27, 2018
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Ryo Kusakabe, Motoyuki Abe, Ayumu Hatanaka, Toshihiro Aono, Teppei Hirotsu, Hideyuki Sakamoto, Masahiro Toyohara, Osamu Mukaihara, Takao Fukuda, Yoshihito Yasukawa, Akiyasu Miyamoto
  • Publication number: 20170335787
    Abstract: The purpose of the present invention is to provide a fuel injection valve control device with which. variability in the injection amount with respect to drive pulse width can be kept to a satisfactory level in each of a plurality of fuel injection devices. The present invention provides a fuel injection valve control device for controlling a plurality of fuel injection devices each equipped with a valve body and a solenoid for opening the valve body, characterized in that the device is configured such that, a prescribed time after voltage has been applied to the solenoid, a holding current is applied, the prescribed time and the holding current being corrected for each of the fuel injection devices, on the basis of the operating characteristics of the fuel injection device.
    Type: Application
    Filed: December 7, 2015
    Publication date: November 23, 2017
    Inventors: Toshihiro AONO, Motoyuki ABE, Masahiro TOYOHARA, Osamu MUKAIHARA
  • Publication number: 20170218876
    Abstract: A method for detecting variations between the quantities of fuel injected into cylinders by fuel injection devices and correcting the fuel injection quantity variation while minimizing the computational load on a drive device and the level of performance required of a pressure sensor includes a drive device for fuel injection control, wherein movable valves are driven so that predetermined quantities of fuel are injected by applying, for the duration of a set energization time, a current that will reach an energization current to solenoids of a plurality of fuel injection devices which open/close fuel flow paths. The drive device is characterized in that the set energization time or energization current is corrected on the basis of a pressure detection value from a pressure sensor that is attached to a fuel supply pipe disposed upstream of the plurality of fuel injection devices.
    Type: Application
    Filed: April 22, 2015
    Publication date: August 3, 2017
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Ryo KUSAKABE, Motoyuki ABE, Toshihiro AONO, Takashi OKAMOTO
  • Patent number: 9714626
    Abstract: An object of this disclosure is to provide a fuel injection device that can reliably detect an operation timing of a valve body, that is, a valve opening timing with high accuracy. The current of an electromagnetic valve reaches I2 at time t3, an FET 201 and an FET 221 are turned on, and a battery voltage VB is applied to the electromagnetic valve until time t5 is reached. The amount of displacement of the valve body reaches a target amount of control lift at time t4 between time t3 and time t5, that is, a movable core 304 comes into contact with a fixed core 301. The detection of the valve opening timing is performed during the period from time t3 to time t5.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: July 25, 2017
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Ayumu Hatanaka, Ryo Kusakabe, Motoyuki Abe, Toshihiro Aono, Teppei Hirotsu, Hideyuki Sakamoto, Takao Fukuda, Hideharu Ehara, Masahiro Toyohara, Akira Nishioka, Toshio Hori, Kiyoshi Aiki
  • Publication number: 20160237937
    Abstract: An object of the invention is to provide a drive device of a fuel injection device which can increase the accuracy in an injected fuel injection amount by combining the fuel injections from a plurality of injection pulse widths. In the drive device of the fuel injection device which has a function of driving the fuel injection device such that the fuel injection is performed plural times in one combustion cycle, the fuel injection device is driven such that a fuel injection at a target opening level in which a valve element or a movable element of the fuel injection device reaches a regulation member and a fuel injection at an intermediate opening level in which the valve element does not reach the regulation member are included in the plural times of division injections performed in one combustion cycle.
    Type: Application
    Filed: June 16, 2014
    Publication date: August 18, 2016
    Inventors: Ryo KUSAKABE, Toshihiro AONO, Motoyuki ABE, Takuya MAYUZUMI, Masahiro TOYOHARA, Takashi OKAMOTO, Osamu MUKAIHARA, Shinji NAKAGAWA, Yusuke KIHARA
  • Publication number: 20160177855
    Abstract: A drive device capable of detecting individual variations of an injection quantity of a fuel injection device of each cylinder and adjusting a current waveform provided to an injection pulse width and a solenoid such that the individual variations of the fuel injection devices are reduced. The fuel injection device in the present invention includes a valve body that closes a fuel passage by coming into contact with a valve seat and opens the fuel passage by separating from the valve seat and a magnetic circuit constructed of a solenoid, a fixed core, a nozzle holder, a housing, and a needle and when a current is supplied to the solenoid, a magnetic suction force acts on the needle and the needle has a function to open the valve body by colliding against the valve body after performing a free running operation and changes of acceleration of the needle due to collision of the needle against the valve body are detected by a current flowing through the solenoid.
    Type: Application
    Filed: July 29, 2013
    Publication date: June 23, 2016
    Inventors: Ryo KUSAKABE, Motoyuki ABE, Ayumu HATANAKA, Toshihiro AONO, Teppei HIROTSU, Hideyuki SAKAMOTO, Masahiro TOYOHARA, Osamu MUKAIHARA, Takao FUKUDA, Yoshihito YASUKAWA, Akiyasu MIYAMOTO
  • Publication number: 20160076498
    Abstract: Provided are an electromagnetic valve control unit and a fuel injection control device using the same that can precisely detect a change of an operating state of an electromagnetic valve, that is, a valve opening time or a valve closing time of the electromagnetic valve, precisely correct a drive voltage or a drive current applied to the electromagnetic valve, and appropriately control opening/closing of the electromagnetic valve, with a simple configuration. In an electromagnetic valve control unit for controlling opening/closing of an electromagnetic valve by a drive voltage and a drive current to be applied, the drive voltage and the drive current applied to the electromagnetic valve are corrected on the basis of a detection time of an inflection point from time series data of the drive voltage and the drive current when the electromagnetic valve is opened/closed.
    Type: Application
    Filed: March 7, 2014
    Publication date: March 17, 2016
    Inventors: Toshihiro AONO, Motoyuki ABE, Ryo KUSAKABE, Teppei HIROTSU, Ayumu HATANAKA, Hideyuki SAKAMOTO, Takao FUKUDA, Masahiro TOYOHARA, Osamu MUKAIHARA
  • Publication number: 20150377176
    Abstract: An object of this disclosure is to provide a fuel injection device that can reliably detect an operation timing of a valve body, that is, a valve opening timing with high accuracy. The current of an electromagnetic valve reaches I2 at time t3, an FET 201 and an FET 221 are turned on, and a battery voltage VB is applied to the electromagnetic valve until time t5 is reached. The amount of displacement of the valve body reaches a target amount of control lift at time t4 between time t3 and time t5, that is, a movable core 304 comes into contact with a fixed core 301. The detection of the valve opening timing is performed during the period from time t3 to time t5.
    Type: Application
    Filed: January 24, 2014
    Publication date: December 31, 2015
    Inventors: Ayumu HATANAKA, Ryo KUSAKABE, Motoyuki ABE, Toshihiro AONO, Teppei HIROTSU, Hideyuki SAKAMOTO, Takao FUKUDA, Hideharu EHARA, Masahiro TOYOHARA, Akira NISHIOKA, Toshio HORI, Kiyoshi AIKI
  • Patent number: 8825240
    Abstract: In order to minimize a calculation load and surely obtain a maximum adhesion torque, estimated adhesion torques are always stored, an maximum value is obtained from the stored plural estimated adhesion torques immediately before slip/skid is detected when detecting the slip/skid, and the maximum value is set as a maximum adhesion torque. The maximum adhesion torque immediately before the slip/skid is detected is compared with a value of the estimated adhesion torque when the slip/skid is detected. When the calculated value exceeds a threshold value, it is determined as a condition where an adhesion coefficient drastically drops, and a suppression/return ratio of the torque is switched to a lower value than that under a condition where the adhesion coefficient does not drastically drop. The value of the torque at the time of suppression or return is set to a smaller value to surely suppress the slip/skid.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: September 2, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Watanabe, Motomi Shimada, Toshihiro Aono, Shuichi Tachihara