Patents Assigned to MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
  • Patent number: 11002291
    Abstract: A compressor impeller includes: a compressor impeller body portion including a boss portion and a plurality of vane portions disposed at intervals in a circumferential direction on a peripheral surface of the boss portion; and a heat shield portion disposed on a side of a back surface of the boss portion and configured to rotate with the compressor impeller body portion.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: May 11, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Takao Yokoyama, Yutaka Fujita
  • Publication number: 20210131344
    Abstract: A nozzle vane for a variable geometry turbocharger satisfies 0.45<(Xp/L)<0.60, where L is a chord length of the nozzle vane, and Xp is a distance between a leading edge of the nozzle vane and a rotation center of the nozzle vane.
    Type: Application
    Filed: December 19, 2018
    Publication date: May 6, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Bipin GUPTA, Toyotaka YOSHIDA, Yosuke DAMMOTO, Yoji AKIYAMA, Sambhav JAIN
  • Publication number: 20210123381
    Abstract: A turbine shaft used for a turbocharger including a turbine and a compressor includes a turbine impeller, and a rotor shaft joined on one end side to the turbine impeller. The rotor shaft includes a fitting region configured to fit with a compressor impeller of the compressor by inserting the other end side of the rotor shaft into a through hole formed in the compressor impeller, a fastening region formed between the fitting region and the other end side of the rotor shaft, and configured to allow fastening by a fastening part, and a tapered part having a maximum outer diameter at a position closest to the turbine impeller in the fitting region and formed such that an outer diameter of the rotor shaft decreases from the position closest to the turbine impeller toward a tip side of the compressor impeller.
    Type: Application
    Filed: August 7, 2018
    Publication date: April 29, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yutaka FUJITA, Yosuke DANMOTO
  • Publication number: 20210123380
    Abstract: A turbine rotor blade according to at least one embodiment of the present invention is to be connected to a rotational shaft so as to be rotatable around an axis and includes: a hub having a hub surface inclined with respect to the axis in a cross-section along the axis; at least one rotor blade disposed on the hub surface; and a connection passage disposed inside the turbine rotor blade and connecting a first opening disposed in the at least one rotor blade and a second opening disposed downstream of the first opening in the turbine rotor blade.
    Type: Application
    Filed: January 11, 2018
    Publication date: April 29, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Takao YOKOYAMA, Toru HOSHI, Toyotaka YOSHIDA, Keigo SAKAMOTO
  • Publication number: 20210123456
    Abstract: An inclination angle between a direction perpendicular to a rotational axis and a tangential direction of a radially outer edge of a radially outermost concave arc portion, which is located outermost in the radial direction of an impeller among at least one concave arc portion, has a distribution along the circumferential direction of a scroll passage, and when a circumferential position in the scroll passage from a tongue of a scroll part to an outlet of the scroll passage is represented by a central angle about the rotational axis by using the tongue as a reference, the distribution of the inclination angle has a local minimum value or a minimum value in a range of the central angle of 30° to 210°.
    Type: Application
    Filed: November 6, 2017
    Publication date: April 29, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventor: Kenichiro IWAKIRI
  • Publication number: 20210115811
    Abstract: A forced induction device (100) includes: a rotor (1) which includes a turbine side shaft portion (11), a compressor side shaft portion (12), and a connection shaft portion (13) connecting these to each other; a turbine side bearing (5) which supports the turbine side shaft portion (11); and a compressor side bearing (6) which supports the compressor side shaft portion (12). A rigidity of the connection shaft portion (13) is lower than that of the turbine side shaft portion (11) and the compressor side shaft portion (12) so that a node in a mode shape at each critical speed involving with an operating rotational speed region of the rotor (1) is located between the turbine side bearing (5) and the compressor side bearing (6).
    Type: Application
    Filed: February 20, 2018
    Publication date: April 22, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Takuya ARAKAWA, Takaya FUTAE, Shuichi MIURA, Yosuke DANMOTO
  • Publication number: 20210108647
    Abstract: A centrifugal compressor includes: an impeller; a compressor inlet tube configured to guide air to the impeller; a scroll flow passage disposed on a radially outer side of the impeller; a bypass flow passage branching from the scroll flow passage via a branch port, the bypass flow passage connecting to the compressor inlet tube not via the impeller; and a bypass valve capable of opening and closing a valve port disposed in the bypass flow passage. The branch port has a non-circular shape when viewed along a normal N1 of the branch port passing through a center of the branch port.
    Type: Application
    Filed: July 6, 2018
    Publication date: April 15, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Kenichiro IWAKIRI, Yutaka FUJITA, Yoshihiro HAYASHI
  • Patent number: 10961904
    Abstract: A turbocharger for supercharging an internal combustion engine includes: a bearing housing which accommodates a bearing supporting a rotational shaft of the turbocharger; an oil discharge port for discharging lubricant oil stored in an internal space of the bearing housing; an air pocket formed in the oil discharge port or an oil discharge pipe connected to the oil discharge port; and a communication flow passage which brings the air pocket and the internal space into communication.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: March 30, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yoshimi Kagimoto, Tatsuya Ishizaki, Yuta Ishii
  • Publication number: 20210087969
    Abstract: A turbine includes a turbine impeller, a turbine housing disposed so as to cover the turbine impeller and internally forming a scroll flow passage through which an exhaust gas flows, and a throat forming portion which is provided as a separate piece from the turbine housing. The throat forming portion is disposed to face a section of the turbine housing and forms a hub-side wall surface of a throat portion of the scroll flow passage in an axial direction, the section forming a shroud-side wall surface of the throat portion.
    Type: Application
    Filed: October 31, 2017
    Publication date: March 25, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventor: Toyotaka YOSHIDA
  • Patent number: 10954816
    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: Grant
    Filed: September 28, 2017
    Date of Patent: March 23, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Tsuyoshi Kitamura, Seiichi Ibaraki, Toyotaka Yoshida, Hiroshi Suzuki, Motoki Ebisu
  • Patent number: 10954818
    Abstract: A turbocharger includes: a rotating shaft which extends along an axis; a turbine wheel which is provided on one end side of the rotating shaft; a compressor wheel which is provided on the other end side of the rotating shaft; a rolling bearing which includes an inner race fixed to an outer circumferential surface of the rotating shaft, an outer race surrounding the inner race from an outside in a radial direction, and rolling bodies arranged between the inner race and the outer race and rotatably supports the rotating shaft around the axis; a housing which covers the rolling bearing from an outer circumferential side with a gap between the housing and an outer circumferential surface of the rolling bearing; and a plurality of lubricating oil supply lines through which lubricating oil is supplied to different locations in the housing at different state quantities.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: March 23, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yoshitomo Noda, Motoki Ebisu, Hiroshi Suzuki
  • Patent number: 10941701
    Abstract: The supercharging system and the internal combustion engine according to the present invention are provided with: a first supercharger (20); a second supercharger (30); an electric motor (23) connected to a shaft end of a first compressor (21); a generator (24) connected to a shaft end of a first turbine (22); a bypass exhaust pipe (L6) that allows exhaust air to bypass the first turbine (22); a cooler (51) that cools the generator (24); and a control device (50) that activates the cooler (51) when the generator (24) is driven by exhaust air that has driven the first turbine (22).
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: March 9, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yukio Yamashita, Byeongil An, Motoki Ebisu
  • Publication number: 20210062676
    Abstract: A driving device includes: a shaft; and a cylindrical bush having an insertion hole into which the shaft can be inserted. The insertion hole includes an opening portion having an inner diameter decreasing from a first end surface toward a second end surface of the bush, and a small-diameter hole portion extending from an end of the opening portion to the second end surface. The shaft includes a shaft portion having an outer diameter smaller than an inner diameter of the small-diameter hole portion, and an abutment portion having an outer diameter greater than the inner diameter of the small-diameter hole portion. The bush has a sealing surface defining the opening portion. The abutment portion of the shaft abuts on the sealing surface of the bush in an axial direction of the insertion hole to seal a gap formed between the shaft and the bush inside the insertion hole.
    Type: Application
    Filed: January 30, 2018
    Publication date: March 4, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Tatsuya ISHIZAKI, Yuta ISHII, Takaya FUTAE, Noriyuki HAYASHI
  • Publication number: 20210062751
    Abstract: An internal combustion engine with a turbocharger according to an embodiment includes a cylinder block internally including a plurality of cylinders, a cylinder head disposed on top of the cylinder block, and internally including a plurality of exhaust flow passages through which exhaust air discharged from each of the plurality of cylinders flows, and the turbocharger including a rotational shaft, a turbine wheel, and a compressor wheel, the turbine wheel being disposed at one end of the rotational shaft, the compressor wheel being disposed at the other end of the rotational shaft. At least the turbine wheel of the turbocharger is arranged inside the cylinder head.
    Type: Application
    Filed: January 29, 2018
    Publication date: March 4, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Takao YOKOYAMA, Makoto OZAKI
  • Patent number: 10934867
    Abstract: A stationary-blade-type rotating machine is provided with a rotational shaft, an impeller, an impeller housing having a scroll passage formed on an outer peripheral side of the impeller, a bearing housing connected to the impeller housing in an axial direction of the rotational shaft, a stationary blade disposed in a radial passage formed between the scroll passage and the impeller and defined by an impeller-housing-side member and a bearing-housing-side member which face each other in the axial direction of the rotational shaft. The fixation unit includes an annular circumferential groove formed in an inner peripheral surface of the impeller housing and a ring-shaped fitting member subjected to a force for expanding in a radial direction while being fitted into the circumferential groove. The fitting member is configured to press the stationary blade to the impeller housing via at least one of the impeller-housing-side member or the bearing-housing-side member.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: March 2, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Kazuya Takeda, Takashi Shiraishi, Kazuki Okuda, Takeshi Yoshimi, Toshimasa Igusa
  • Patent number: 10934887
    Abstract: A rotary machine include: a rotational shaft; an impeller mounted to the rotational shaft; an impeller housing accommodating the impeller; a bearing housing accommodating a bearing which supports the rotational shaft rotatably, the bearing housing being fastened to the impeller housing; and a fastening member fastening the impeller housing and the bearing housing in an axial direction of the rotational shaft. The impeller housing, the bearing housing, and the fastening member each includes a contact surface in a direction intersection with an axial direction of the rotational shaft. A thin-plate member formed separately from the impeller housing, the bearing housing, and the fastening member is interposed between at least two of the contact surfaces.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: March 2, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yukihide Nagayo, Tomoaki Takeshita, Yosuke Dammoto, Shinji Ogawa
  • Publication number: 20210033103
    Abstract: A centrifugal compressor includes an impeller, a compressor inlet pipe for guiding air to the impeller, a scroll passage disposed on an outer peripheral side of the impeller, and a bypass passage connecting the compressor inlet pipe and the scroll passage and bypassing the impeller. In a cross-section perpendicular to an axis of the compressor inlet pipe, when A1 is a connection portion on a downstream side in a rotational direction of the impeller of connection portions between an inner wall surface of the compressor inlet pipe and an inner wall surface of the bypass passage, C is a virtual circle constituting the inner wall surface of the compressor inlet pipe, and L1 is a tangent line of the virtual circle C at the connection portion A1, the inner wall surface of the bypass passage is formed from the connection portion A1 along the tangent line L1.
    Type: Application
    Filed: July 13, 2018
    Publication date: February 4, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yoshihiro HAYASHI, Yutaka FUJITA, Kenichiro IWAKIRI
  • Publication number: 20210033107
    Abstract: In a centrifugal compressor including an impeller rotatably disposed in a housing, the housing includes a shroud wall and a hub wall, which define a diffuser passage communicating with an outlet of the impeller. The diffuser flow passage includes a pinched part configured such that the shroud wall is closer to the hub wall radially outward of the centrifugal compressor from the outlet of the impeller, and a parallel part communicating with the pinched part on a radially outer side of the centrifugal compressor than the pinched part, the parallel part being configured such that the shroud wall and the hub wall are parallel to each other. The shroud wall has a surface facing the impeller and the hub wall, the surface having a cross-sectional shape where a tangent line exists at any position in a cross-section including an axis of the impeller.
    Type: Application
    Filed: April 4, 2018
    Publication date: February 4, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yutaka FUJITA, Hironori HONDA, Nobuhito OKA
  • Patent number: 10907541
    Abstract: A turbine housing includes: a housing body which includes a turbine housing part housing a turbine wheel, an inlet section forming an inlet flow passage for guiding exhaust gas to the turbine housing part, an outlet section forming an outlet flow passage for discharging the exhaust gas from the turbine housing part, and a waste-gate flow passage which brings the inlet flow passage and the outlet flow passage into communication so as to bypass the turbine housing part; and a sleeve disposed along an inner wall surface of the housing body forming the waste gate flow passage, at least on a downstream side of the waste-gate flow passage of the housing body with respect to a flow direction of the exhaust gas.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: February 2, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Tsuyoshi Kitamura, Toyotaka Yoshida, Toru Hoshi, Motoki Ebisu
  • Patent number: 10907649
    Abstract: A turbine housing includes: a housing body which is configured to accommodate a turbine wheel and which includes an inlet section forming an inlet flow passage for guiding exhaust gas to the turbine wheel, and an outlet section forming an outlet flow passage for discharging the exhaust gas from the turbine wheel; and at least one sleeve disposed along an inner wall surface of at least one of the inlet section or the outlet section of the housing body. The at least one sleeve includes a plurality of sections divided along a flow direction of the exhaust gas.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: February 2, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Tsuyoshi Kitamura, Toyotaka Yoshida, Toru Hoshi, Motoki Ebisu