Patents by Inventor Masashi Yoshikawa

Masashi Yoshikawa 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: 11401880
    Abstract: When injecting fuel from a fuel injection valve by energizing thereof, an energization time correction amount calculator performs an area correction of an electric current flowing in the fuel injection valve, and calculates an energization time correction amount. An injection instruction state determiner determines an inter-cylinder injection instruction interval among cylinders which inject fuel in series or determines an injection instruction overlapping state. An upper guard value setter sets an upper guard value of the energization time correction amount based on the inter-cylinder injection instruction state determined by the injection instruction state determiner.
    Type: Grant
    Filed: May 26, 2021
    Date of Patent: August 2, 2022
    Assignee: DENSO CORPORATION
    Inventors: Kouyou Yoshikawa, Masashi Inaba
  • Publication number: 20220220619
    Abstract: A method for pickling a steel plate having a first steel plate portion and a second steel plate portion which is connected to a tail end of the first steel plate portion and which requires a longer time for pickling than the first steel plate portion when pickled under the same condition includes: a step of pickling the steel plate by immersing the steel plate in an acid solution in at least one pickling tank while conveying the steel plate; a step of circulating the acid solution, through a circulation line connected to any of the at least one pickling tank, between the pickling tank and an oxidizing device disposed in the circulation line; a step of oxidizing Fe2+ in the acid solution to Fe3+ by the oxidizing device using a gaseous oxidant; and a feeding start step of, upon switching from pickling of the first steel plate portion to pickling of the second steel plate portion, starting feeding of a liquid oxidant for oxidizing Fe2+ in the acid solution to Fe3+ to any of the at least one pickling tank or to t
    Type: Application
    Filed: January 9, 2020
    Publication date: July 14, 2022
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Kosei TSUJI, Ryusuke NAKATSUKA, Masashi YOSHIKAWA, Takuya HIRATA
  • Publication number: 20220154351
    Abstract: An acid solution preparation device is an acid solution preparation device for preparing an acid solution used for pickling of a steel plate, the device including a sealed tank for storing the acid solution, a gas supply part for supplying an oxygen-containing gas from outside of the sealed tank to the sealed tank, and a purge part for discharging a gas in the sealed tank to the outside.
    Type: Application
    Filed: March 22, 2019
    Publication date: May 19, 2022
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Kosei TSUJI, Ryusuke NAKATSUKA, Takahiro YAGI, Masashi YOSHIKAWA, Hideaki TAKATANI, Toyoaki YASUI, Takuya HIRATA
  • Patent number: 11286539
    Abstract: A cooling device for a metal plate includes a plurality of first nozzles and a plurality of second nozzles disposed on both sides of the metal plate, respectively, in a thickness direction of the metal plate across a pass line of the metal plate. The plurality of first nozzles form a staggered array in which a pitch in a width direction of the metal plate is Xn, a pitch in a longitudinal direction of the metal plate is Yn, and an offset amount in the width direction of a pair of first nozzles disposed adjacent to each other in the longitudinal direction is ?Xn. The plurality of second nozzles form a staggered array in which a pitch in the width direction is Xn, a pitch in the longitudinal direction is Yn, and an offset amount in the width direction of a pair of second nozzles disposed adjacent to each other in the longitudinal direction is ?Xn.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: March 29, 2022
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takanori Nagai, Masashi Yoshikawa, Ryusuke Kimoto
  • Patent number: 11273862
    Abstract: A steering control device capable of suitably handling a temporary drop in a supply voltage of a vehicle is provided. An ECU includes a microcomputer, a pre-driver, and an inverter. The microcomputer generates a command signal for the pre-driver. Upon being initialized by the microcomputer, the pre-driver becomes operable to generate a drive signal for the inverter based on the command signal. The inverter converts direct current power supplied from a battery into alternating current power for a motor by operating based on the drive signal. When a drop in a voltage of the battery is detected, the pre-driver transmits an abnormal-condition detection signal to the microcomputer and stops operating by resetting a state of the pre-driver to an initial state where the pre-driver is not initialized yet. When the abnormal-condition detection signal is received, the microcomputer re-initializes the pre-driver.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: March 15, 2022
    Assignee: JTEKT CORPORATION
    Inventor: Masashi Yoshikawa
  • Patent number: 11248288
    Abstract: When a portion for measuring the plating adhesion amount reaches an upstream side position, plating adhesion amount estimation values are calculated by using a plating adhesion amount estimation expression at positions away from a position that faces the distance sensors, that is, the upstream side position, by strip-width direction distances, of the surfaces of the steel strip. When the portion for measuring the plating adhesion amount reaches a downstream side position, the strip-width direction distances of the plating adhesion amount meters are matched to the strip-width direction distances, and the plating adhesion amount actual measurement values are obtained. The plating adhesion amount estimation expression is corrected on the basis of the differences between the plating adhesion amount estimation values and the plating adhesion amount actual measurement values. Accordingly, the control accuracy of the plating adhesion amount is improved.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: February 15, 2022
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takashi Yonekura, Masao Tambara, Masashi Yoshikawa, Shinya Kanemori, Kazuki Yoshida
  • Publication number: 20210002774
    Abstract: A pickling facility includes: a pickling tank for storing an acid solution; a conveyance part for continuously conveying a steel plate immersed in the acid solution; a measurement part for measuring at least one parameter which has a correlation with a heat transfer coefficient between the acid solution and a reference surface disposed in the acid solution so as to face the steel plate; and a conveyance speed decision part configured to decide a conveyance speed of the steel plate conveyed by the conveyance part, on the basis of a measurement result of the at least one parameter.
    Type: Application
    Filed: April 16, 2018
    Publication date: January 7, 2021
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Kosei TSUJI, Ryusuke NAKATSUKA, Masashi YOSHIKAWA, Shinji NANBA
  • Publication number: 20200346264
    Abstract: A shape measurement device for a metal plate includes a plurality of distance sensors including one or more first sensors disposed on a first side and a plurality of second sensors disposed on a second side, of the metal plate with respect to a thickness direction of the metal plate, across a pass line of the metal plate. The one or more first sensors are positioned, with respect to a width direction of the metal plate, between a pair of second sensors disposed adjacent to each other in the width direction.
    Type: Application
    Filed: November 24, 2017
    Publication date: November 5, 2020
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takashi YONEKURA, Masao TAMBARA, Masashi YOSHIKAWA
  • Patent number: 10815559
    Abstract: Provided are a molten metal plating facility and a method with which degradation in the surface quality of a strip can be prevented by preventing the adhesion of splashes.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: October 27, 2020
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takashi Yonekura, Masao Tambara, Masashi Yoshikawa, Shinji Nanba
  • Publication number: 20200261957
    Abstract: A warpage correction apparatus for a metal strip to be used in a continuous plating facility for the metal strip includes a sink roll disposed downstream of a fixed roll, configured to change the conveying direction of the metal strip, with respect to a conveying direction of the metal strip and inside a molten metal pot for plating, and a correction roll disposed between the fixed roll and the sink roll and configured to correct warpage of the metal strip. A ratio D3/D1 of a diameter D3 of the sink roll to a diameter D1 of the fixed roll is not less than 1.5.
    Type: Application
    Filed: November 30, 2017
    Publication date: August 20, 2020
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takashi YONEKURA, Masao TAMBARA, Masashi YOSHIKAWA
  • Publication number: 20200190622
    Abstract: A cooling device for a metal plate includes a plurality of first nozzles and a plurality of second nozzles disposed on both sides of the metal plate, respectively, in a thickness direction of the metal plate across a pass line of the metal plate. The plurality of first nozzles form a staggered array in which a pitch in a width direction of the metal plate is Xn, a pitch in a longitudinal direction of the metal plate is Yn, and an offset amount in the width direction of a pair of first nozzles disposed adjacent to each other in the longitudinal direction is ?Xn. The plurality of second nozzles form a staggered array in which a pitch in the width direction is Xn, a pitch in the longitudinal direction is Yn, and an offset amount in the width direction of a pair of second nozzles disposed adjacent to each other in the longitudinal direction is ?Xn.
    Type: Application
    Filed: November 20, 2017
    Publication date: June 18, 2020
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takanori NAGAI, Masashi YOSHIKAWA, Ryusuke KIMOTO
  • Publication number: 20200047234
    Abstract: A crossbow correction device 16 for correcting crossbow of a steel strip S by a magnetic force during conveyance includes a plurality of electromagnets 57a to 57d, 67a to 67d arranged in a strip width direction of the steel strip S and facing each other so as to sandwich the steel strip S in a strip thickness direction, a moving mechanism 51 to 54, 61 to 64 capable of moving the electromagnets 57a to 57d, 67a to 67d relative to the steel strip S, and a controller 17 configured to operate the moving mechanism 51 to 54, 61 to 64, based on a current value flowing through the electromagnets 57a to 57d, 67a to 67d.
    Type: Application
    Filed: February 20, 2017
    Publication date: February 13, 2020
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takashi YONEKURA, Masao TAMBARA, Masashi YOSHIKAWA
  • Publication number: 20190390315
    Abstract: When a portion for measuring the plating adhesion amount reaches an upstream side position, plating adhesion amount estimation values are calculated by using a plating adhesion amount estimation expression at positions away from a position that faces the distance sensors, that is, the upstream side position, by strip-width direction distances, of the surfaces of the steel strip. When the portion for measuring the plating adhesion amount reaches a downstream side position, the strip-width direction distances of the plating adhesion amount meters are matched to the strip-width direction distances, and the plating adhesion amount actual measurement values are obtained. The plating adhesion amount estimation expression is corrected on the basis of the differences between the plating adhesion amount estimation values and the plating adhesion amount actual measurement values. Accordingly, the control accuracy of the plating adhesion amount is improved.
    Type: Application
    Filed: April 14, 2017
    Publication date: December 26, 2019
    Applicant: Primetals Technologies Japan, Ltd.
    Inventors: Takashi YONEKURA, Masao TAMBARA, Masashi YOSHIKAWA, Shinya KANEMORI, Kazuki YOSHIDA
  • Publication number: 20190370995
    Abstract: A strip edge detection device includes a line illumination 16 disposed so as to face a plated strip 1 and configured to emit a marking light extending along the strip width direction to the vicinity of an edge 1a of the plated strip 1, a camera 17 configured to capture an image of a region including the edge 1a of the plated strip 1 and a regular reflected light 16A of the marking light reflected by the plated strip 1, an analysis unit 18A configured to determine the edge position x and calculate real coordinates of the edge position x, based on the image I captured by the camera 17, a camera driving unit 19 configured to move the camera 17 along the strip width direction, and a control unit 18B configured to control the camera driving mechanism 19 so that the edge position x is centered in the image I in the strip width direction, based on the edge position x determined by the analysis unit 18A.
    Type: Application
    Filed: February 20, 2017
    Publication date: December 5, 2019
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takashi YONEKURA, Masao TAMBARA, Masashi YOSHIKAWA, Masahiro YAMADA
  • Publication number: 20190263444
    Abstract: A steering control device capable of suitably handling a temporary drop in a supply voltage of a vehicle is provided. An ECU includes a microcomputer, a pre-driver, and an inverter. The microcomputer generates a command signal for the pre-driver. Upon being initialized by the microcomputer, the pre-driver becomes operable to generate a drive signal for the inverter based on the command signal. The inverter converts direct current power supplied from a battery into alternating current power for a motor by operating based on the drive signal. When a drop in a voltage of the battery is detected, the pre-driver transmits an abnormal-condition detection signal to the microcomputer and stops operating by resetting a state of the pre-driver to an initial state where the pre-driver is not initialized yet. When the abnormal-condition detection signal is received, the microcomputer re-initializes the pre-driver.
    Type: Application
    Filed: February 19, 2019
    Publication date: August 29, 2019
    Applicant: JTEKT CORPORATION
    Inventor: Masashi YOSHIKAWA
  • Publication number: 20180251879
    Abstract: Provided are a molten metal plating facility and a method with which degradation in the surface quality of a strip can be prevented by preventing the adhesion of splashes.
    Type: Application
    Filed: February 20, 2017
    Publication date: September 6, 2018
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takashi YONEKURA, Masao TAMBARA, Masashi YOSHIKAWA, Shinji NANBA
  • Patent number: 9951407
    Abstract: The present invention reduces the amount of gas consumed, edge-overcoating and splashing and adjusts plating thickness with high precision by providing a wiping nozzle with: thin plates, which are each inserted into a lip from the entrances to the lip for a specified distance to the inside of the two ends of the lip in the sheet width direction in order to seal the gas jet where the thin plates are inserted, and which are movable in the sheet width direction of the lip; and ropes extending in the sheet width direction of the lip so as to track the movements of the thin plates and seal the gas jet in a specified range.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: April 24, 2018
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takashi Yonekura, Masao Tanbara, Masashi Yoshikawa
  • Patent number: 9939209
    Abstract: A gas cooler (10) which is provided with a heat exchanger (6), cools a gas to be cooled, which is introduced from the outside, by performing heat exchange between the gas to be cooled and the heat exchanger, and discharges the cooled gas to the outside. The heat exchanger includes: a plurality of heat transfer fins (8) which are placed side by side via a prescribed gap therebetween, the gas to be cooled flowing through the gaps; and heat transfer tubes (7) which pierce through the plurality of heat transfer fins and are provided in a plurality of rows along the direction in which the gas to be cooled flows. The outside diameter do of the heat transfer tubes is 20 to 30 mm.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: April 10, 2018
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kazutoshi Yokoo, Shigenari Horie, Masashi Yoshikawa, Tomoaki Takeda, Koichi Mizushita, Kazunari Tanaka
  • Publication number: 20170114437
    Abstract: The present invention reduces the amount of gas consumed, edge-overcoating and splashing and adjusts plating thickness with high precision by providing a wiping nozzle with: thin plates, which are each inserted into a lip from the entrances to the lip for a specified distance to the inside of the two ends of the lip in the sheet width direction in order to seal the gas jet where the thin plates are inserted, and which are movable in the sheet width direction of the lip; and ropes extending in the sheet width direction of the lip so as to track the movements of the thin plates and seal the gas jet in a specified range.
    Type: Application
    Filed: April 23, 2015
    Publication date: April 27, 2017
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takashi YONEKURA, Masao TANBARA, Masashi YOSHIKAWA
  • Publication number: 20170009326
    Abstract: Each of the moving blocks of the plate crossbow correction device includes distance sensors and electromagnets, and plate crossbow is corrected by adjusting electromagnetic force by the electromagnets in accordance with distances to strips. The moving blocks are movable in the horizontal direction and ratios of moving distances of the moving blocks are adjusted to be constant when seen from a central position.
    Type: Application
    Filed: July 1, 2016
    Publication date: January 12, 2017
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Takashi YONEKURA, Masao TANBARA, Masashi YOSHIKAWA