Patents by Inventor Seiichi Ibaraki

Seiichi Ibaraki 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).

  • Publication number: 20200088210
    Abstract: A rotary machine blade (31) equipped with a clearance flow suppression blade section (34), the lean angle of which has one or more inflection points, and which is formed such that when the direction from a positive-pressure surface (31a) to a negative-pressure surface (31b) is taken as the normal direction, an inflection point (P1) of the lean angle positioned farthest toward the blade end (33) changes from the negative to the positive direction in the direction away from the blade end (33).
    Type: Application
    Filed: March 31, 2016
    Publication date: March 19, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Hironori HONDA, Seiichi IBARAKI, Kenichiro IWAKIRI, Tadashi KANZAKA
  • Publication number: 20200063749
    Abstract: A centrifugal compressor includes an impeller rotatably disposed and having a plurality of first blades and a shroud cover disposed on a leading edge side of the first blades partially in a rotational axis direction of the impeller and connecting the first blades circumferentially adjacent to each other. The shroud cover is shaped such that a position of at least one of an upstream edge or a downstream edge of the shroud cover in the rotational axis direction changes along a circumferential direction of the shroud cover.
    Type: Application
    Filed: November 6, 2017
    Publication date: February 27, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Kenichiro IWAKIRI, Yoshihiro HAYASHI, Seiichi IBARAKI
  • Patent number: 10563515
    Abstract: A turbine impeller includes: a hub portion coupled to an end of a rotational shaft; a plurality of main blades disposed at intervals on a peripheral surface of the hub portion; and a short blade disposed between two adjacent main blades among the plurality of main blades. An inter-blade flow channel is formed between the two adjacent main blades so that a fluid flows through the inter-blade flow channel from an outer side toward an inner side of the turbine impeller in a radial direction. In a meridional plane, a hub-side end of a leading edge of the short blade is disposed on an inner side, in the radial direction, of a hub-side end of a leading edge of the main blade.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: February 18, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Takao Yokoyama, Seiichi Ibaraki, Toyotaka Yoshida
  • Patent number: 10378369
    Abstract: A turbine is provided with a turbine rotor blade, and a turbine housing having a scroll part extending along a circumferential direction of the turbine rotor blade. The scroll part is configured such that an A/R ratio of a flow passage area A to a distance R between an axis of the turbine rotor blade and a flow passage center of the scroll part has a concave distribution at least in a part of a graph where an abscissa represents a circumferential position around the axis of the turbine rotor blade and an ordinate represents the A/R ratio.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: August 13, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takao Yokoyama, Seiichi Ibaraki, Ricardo Martinez-Botas, Mingyang Yang
  • Publication number: 20190234237
    Abstract: A turbocharge includes: a compressor wheel; a turbine wheel configured to rotate with the compressor wheel; a turbine housing disposed so as to cover the turbine wheel; a bearing supporting a rotational shaft of the turbine wheel rotatably; and a bearing housing accommodating the bearing. One of the turbine housing or the bearing housing includes a fin portion protruding toward the other one of the turbine housing or the bearing housing so as to extend along an axial direction of the rotational shaft, and, between the turbine housing and the bearing housing, a cavity is formed on each side of the fin portion with respect to a radial direction of the rotational shaft.
    Type: Application
    Filed: September 28, 2017
    Publication date: August 1, 2019
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Tsuyoshi KITAMURA, Seiichi IBARAKI, Toyotaka YOSHIDA, Hiroshi SUZUKI, Motoki EBISU
  • Publication number: 20190154043
    Abstract: This turbocharger (1A) is provided with: a rotating shaft (4); a turbine wheel (2); a compressor wheel (3); a bearing housing (6) provided with journal bearings (5A, 5B) for rotatably supporting a shaft (4), and a thrust bearing (8) for supporting the rotating shaft (4) in the center axis (C) direction thereof; and a turbine housing (31) in which the turbine wheel (2) is accommodated. A fluid supply section (70A) for supplying a fluid to the turbine wheel (2) is provided within the turbine housing (31) and said fluid presses the turbine wheel (2) toward a first end (4a) side.
    Type: Application
    Filed: March 30, 2016
    Publication date: May 23, 2019
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yutaka FUJITA, Takao YOKOYAMA, Seiichi IBARAKI
  • Publication number: 20190063260
    Abstract: A turbocharger (10A) has a back plate (41). The back plate (41) is provided with a plate section (41a) and a flange section (41c) which is formed radially outside the plate section (41a) and which is supported so as to be sandwiched between a bearing housing (16) and a turbine housing (31). The turbocharger (10A) is further provided with a flange heat shielding section (53) provided between the flange section (41c) and the bearing housing (16) and consisting of a material having lower heat conductivity than the turbine housing (31) and the back plate (41).
    Type: Application
    Filed: March 7, 2016
    Publication date: February 28, 2019
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Tsuyoshi KITAMURA, Seiichi IBARAKI, Toyotaka YOSHIDA, Hiroshi SUZUKI
  • Patent number: 10167877
    Abstract: An object of the present invention is to decrease a surging limit flow rate at a low flow rate time, by increasing the inflow velocity to the blade of the impeller wheel, by providing a resistive element that narrows in the radial direction a passage cross section of an air intake passage which communicates between a impeller wheel of a centrifugal compressor and an air intake opening. The centrifugal compressor includes: the compressor housing 9 having the air intake opening 13 opened in a rotary shaft direction, and the air intake passage 11; and the impeller wheel 7 for compressing the air flowing in from the air intake opening 13, inside the housing.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: January 1, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Seiichi Ibaraki, Isao Tomita, Hiroshi Suzuki
  • Patent number: 10148141
    Abstract: A motor rotor structure for an electric turbo charger is manufactured at low cost with good quality by fixedly fitting, over a shaft, a rotor core having electromagnetic steel sheets pre-formed as an integrated stack. The rotor structure includes a rotor core which is rotated by a magnetic field formed by a stator in a housing; a shaft configured to rotate a compressor impeller and the rotor core together; and a bearing supporting the shaft. The rotor includes the rotor core including the electromagnetic steel sheets; a stopper portion formed at an intermediate portion of the shaft to restrict axial movement of the rotor core; and a pressing unit which presses the rotor core fitted over the shaft against the stopper portion. The pressing unit prevents a circumferential phase shift between the shaft and the rotor core by a pressing force thereof.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: December 4, 2018
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yukio Yamashita, Noriyuki Hayashi, Seiichi Ibaraki, Katsuyuki Osako, Motoki Ebisu, Byeongil An, Hiroshi Suzuki, Hideaki Arita, Takashi Goto, Toshihiko Miyake
  • Publication number: 20180266442
    Abstract: A compressor impeller includes: a hub; and a blade group including a plurality of blades arranged along a circumferential direction on an outer peripheral surface of the hub, the blade group being configured such that hub-side ends of leading edges of the respective blades are aligned on the same circle. The plurality of blades include at least one first blade and at least one second blade having a different shape from the at least one first blade. When comparing a blade angle of a leading edge of the at least one first blade to a blade angle of a leading edge of the at least one second blade at the same position in a radial direction of the compressor impeller, the blade angle of the leading edge of the at least one first blade is different from the blade angle of the leading edge of the at least one second blade, at least in a partial range in the radial direction of the compressor impeller.
    Type: Application
    Filed: January 14, 2016
    Publication date: September 20, 2018
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Kenichiro IWAKIRI, Isao TOMITA, Seiichi IBARAKI
  • Publication number: 20180010464
    Abstract: A turbine impeller includes: a hub portion coupled to an end of a rotational shaft; a plurality of main blades disposed at intervals on a peripheral surface of the hub portion; and a short blade disposed between two adjacent main blades among the plurality of main blades. An inter-blade flow channel is formed between the two adjacent main blades so that a fluid flows through the inter-blade flow channel from an outer side toward an inner side of the turbine impeller in a radial direction. In a meridional plane, a hub-side end of a leading edge of the short blade is disposed on an inner side, in the radial direction, of a hub-side end of a leading edge of the main blade.
    Type: Application
    Filed: March 26, 2015
    Publication date: January 11, 2018
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takao YOKOYAMA, Seiichi IBARAKI, Toyotaka YOSHIDA
  • Patent number: 9797320
    Abstract: An object is to provide an engine system including an intake bypass device whereby it is possible to expand the operation range of a compressor without causing the output of a turbine to become insufficient. An engine system includes an intake bypass device including a bypass channel connecting a downstream side of a compressor of a turbocharger in an intake channel and an upstream side of a turbine of the turbocharger in an exhaust channel, a bypass valve disposed in the bypass channel and configured to control a flow of compressed intake air in the bypass channel, and a heating unit for heating the compressed intake air flowing through the bypass channel.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: October 24, 2017
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takao Yokoyama, Seiichi Ibaraki, Isao Tomita, Katsuyuki Osako
  • Publication number: 20160319683
    Abstract: A turbine is provided with a turbine rotor blade, and a turbine housing having a scroll part extending along a circumferential direction of the turbine rotor blade. The scroll part is configured such that an A/R ratio of a flow passage area A to a distance R between an axis of the turbine rotor blade and a flow passage center of the scroll part has a concave distribution at least in a part of a graph where an abscissa represents a circumferential position around the axis of the turbine rotor blade and an ordinate represents the A/R ratio.
    Type: Application
    Filed: January 5, 2015
    Publication date: November 3, 2016
    Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., IMPERIAL INNOVATIONS LTD
    Inventors: Takao YOKOYAMA, Seiichi IBARAKI, Ricardo MARTINEZ-BOTAS, Mingyang YANG
  • Publication number: 20160215712
    Abstract: An object is to provide an engine system including an intake bypass device whereby it is possible to expand the operation range of a compressor without causing the output of a turbine to become insufficient. An engine system includes an intake bypass device including a bypass channel connecting a downstream side of a compressor of a turbocharger in an intake channel and an upstream side of a turbine of the turbocharger in an exhaust channel, a bypass valve disposed in the bypass channel and configured to control a flow of compressed intake air in the bypass channel, and a heating unit for heating the compressed intake air flowing through the bypass channel.
    Type: Application
    Filed: October 11, 2013
    Publication date: July 28, 2016
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takao YOKOYAMA, Seiichi IBARAKI, Isao TOMITA, Katsuyuki OSAKO
  • Publication number: 20150354591
    Abstract: An object of the present invention is to decrease a surging limit flow rate at a low flow rate time, by increasing the inflow velocity to the blade of the impeller wheel, by providing a resistive element that narrows in the radial direction a passage cross section of an air intake passage which communicates between a impeller wheel of a centrifugal compressor and an air intake opening. The centrifugal compressor includes: the compressor housing 9 having the air intake opening 13 opened in a rotary shaft direction, and the air intake passage 11; and the impeller wheel 7 for compressing the air flowing in from the air intake opening 13, inside the housing.
    Type: Application
    Filed: February 22, 2013
    Publication date: December 10, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Seiichi IBARAKI, Isao TOMITA, Hiroshi SUZUKI
  • Publication number: 20150345376
    Abstract: A variable geometry exhaust gas turbocharger comprises: a turbine rotor 26 including a rotating shaft 24 and a turbine wheel 12; a bearing housing 20 accommodating a bearing unit 22; a turbine housing 10 accommodating the turbine wheel rotatably and having formed an annular turbine scroll part 16 in which exhaust gas flows; and a variable geometry mechanism 40 provided in an annular nozzle part 18 to guide the exhaust gas flowing in the turbine scroll part into the turbine wheel; wherein the variable geometry mechanism 40 comprises: a nozzle vane 42 protruding, in a state of being unable to rotate, from at least one of a shroud side or a hub side of the nozzle part toward the nozzle part; an annular nozzle wall 44 configured to be movable forward and backward from the hub side toward the shroud side or from the shroud side toward the hub side of the nozzle part, and configured to permit a nozzle width B of the nozzle part to be variable over all circumference; and a driving part 46 for moving the nozzle wall
    Type: Application
    Filed: February 21, 2013
    Publication date: December 3, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Seiichi IBARAKI, Hiroshi SUZUKI, Takao YOKOYAMA
  • Patent number: 9003791
    Abstract: A casing treatment 4 including a recirculation passage 41 and a mixing piping 6 are provided. The recirculation passage 41 has a first recirculation opening 42 and a second recirculation opening 43 that are in communication with each other, the first recirculation opening 42 being formed inside a compressor housing 11 of an exhaust gas turbocharger and opening to an air passage 15 upstream of a compressor impeller 3, the second recirculation opening 43 being formed at the outer circumferential section of the compressor impeller 3. The mixing pipe 6 opens to the recirculation passage 41 and has a return opening 14 for introducing EGR gas and blow-by gas to the recirculation passage 41.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: April 14, 2015
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Seiichi Ibaraki, Takashi Shiraishi, Hiroshi Suzuki
  • Patent number: 8888440
    Abstract: A compressor of an exhaust gas turbocharger has a compressor housing of a divided type that forms an inlet slit, an outlet slit and a recirculation passage at the same time when the compressor housing is assembled. In the compressor of the exhaust gas turbocharger, mating surfaces of compressor housing members 9a and 9b are formed in the neighborhood of the inlet part of the impeller 5 in the compressor housing 9 that is divided into the compressor housing members 9a and 9b in the direction of the rotation axis of the impeller; and, a space forming the recirculation passage 29, an inlet slit 25 and an outlet slit 27 are formed between the mating compressor housing members 9a and 9b.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: November 18, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Isao Tomita, Seiichi Ibaraki, Yasuaki Jinnai, Masaki Tojo
  • Publication number: 20140147306
    Abstract: An object is to increase portions (increase the amount of correction), where the rotational balance of a rotary shaft of a turbocharging device incorporating an electric motor is adjusted, and to maintain sufficient motor driving force even under a high temperature condition. In a balance adjusting structure for the turbocharging device incorporating an electric motor, a rotor core 5 formed by laminating electromagnetic steel plates 51 is interposed between rotor blades provided on one end or both ends, a rotational balance adjusting member made of iron (magnetic induction member) having a thickens larger than the thickness of each electromagnetic steel plate 51 is disposed on an end of the laminated electromagnetic steel plates 51, or between the laminated layers.
    Type: Application
    Filed: June 4, 2012
    Publication date: May 29, 2014
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yukio Yamashita, Noriyuki Hayashi, Seiichi Ibaraki, Katsuyuki Osako, Motoki Ebisu, Byeongil An, Hiroshi Suzuki, Hideaki Arita, Takashi Goto, Toshihiko Miyake
  • Publication number: 20140125208
    Abstract: A motor rotor structure for an electric turbo charger is manufactured at low cost with good quality by fixedly fitting, over a shaft, a rotor core having electromagnetic steel sheets pre-formed as an integrated stack. The rotor structure includes a rotor core which is rotated by a magnetic field formed by a stator in a housing; a shaft configured to rotate a compressor impeller and the rotor core together; and a bearing supporting the shaft. The rotor includes the rotor core including the electromagnetic steel sheets; a stopper portion formed at an intermediate portion of the shaft to restrict axial movement of the rotor core; and a pressing unit which presses the rotor core fitted over the shaft against the stopper portion. The pressing unit prevents a circumferential phase shift between the shaft and the rotor core by a pressing force thereof.
    Type: Application
    Filed: June 4, 2012
    Publication date: May 8, 2014
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yukio Yamashita, Noriyuki Hayashi, Seiichi Ibaraki, Katsuyuki Osako, Motoki Ebisu, Byeongil An, Hiroshi Suzuki, Hideaki Arita, Takashi Goto, Toshihiko Miyake