Patents by Inventor Toyotaka Yoshida

Toyotaka Yoshida 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: 20210231027
    Abstract: A radial inflow turbine includes a scroll flow passage, a turbine wheel disposed radially inward of the scroll flow passage, a plurality of variable nozzle vanes disposed on a flow passage extending from the scroll flow passage toward the turbine wheel, at a radial position between the scroll flow passage and the turbine wheel, a nozzle mount rotatably supporting each of the plurality of variable nozzle vanes, a nozzle plate arranged to face the nozzle mount and forming the flow passage with the nozzle mount, and a swirl generating member disposed, radially outward of the plurality of variable nozzle vanes, on the nozzle plate in a height range which is smaller than that of a vane height of each of the plurality of variable nozzle vanes. A position of an end part of the swirl generating member on a side of the nozzle mount is farther away from the nozzle mount than a position of an end part of each of the plurality of variable nozzle vanes on the side of the nozzle mount in an axial direction.
    Type: Application
    Filed: February 28, 2018
    Publication date: July 29, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Toyotaka YOSHIDA, Bipin GUPTA, Yosuke DAMMOTO, Yoji AKIYAMA
  • Publication number: 20210199020
    Abstract: A nozzle vane for a variable geometry turbocharger has an airfoil including a leading edge, a trailing edge, a pressure surface, and a suction surface at least in a center position in a blade height direction. The airfoil satisfies 0?Wmax/L<0.03, where Wmax is a maximum value of a distance from a line segment connecting the trailing edge and a fixed point on the pressure surface at a 40% chord position from the trailing edge toward the leading edge to a given point on the pressure surface between the trailing edge and the fixed point, and L is a length of the line segment.
    Type: Application
    Filed: September 19, 2019
    Publication date: July 1, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Bipin GUPTA, Toyotaka YOSHIDA, Yosuke DAMMOTO, Yoji AKIYAMA, Sambhav JAIN
  • Patent number: 11028767
    Abstract: A variable geometry turbocharger (100) includes a bearing housing (10) including a bearing-housing side support portion (40) configured to support a radially outer portion (38) of a nozzle mount (16) from a side opposite to a scroll flow passage (4) in an axial direction of a turbine rotor (2), and wherein at least one of the following condition (a) or (b) is satisfied: (a) the bearing-housing side support portion (40) includes at least one bearing-housing side recess portion (46) formed so as to be recessed in the axial direction so as not to be in contact with the radially outer portion (38); (b) the radially outer portion (38) of the nozzle mount (16) includes at least one nozzle-mount side recess portion (62) formed so as to be recessed in the axial direction so as not to be in contact with the bearing-housing side support portion (40).
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: June 8, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Keigo Sakamoto, Yosuke Dammoto, Eigo Katou, Yoji Akiyama, Nariaki Seike, Toyotaka Yoshida, Takeru Chiba
  • Publication number: 20210164384
    Abstract: A turbine includes: a turbine impeller; a housing disposed so as to enclose the turbine impeller, and including a scroll passage positioned on an outer circumferential side of the turbine impeller and an inner circumferential wall part defining an inner circumferential boundary of the scroll passage; a plurality of nozzle vanes disposed inside an intermediate flow passage which is positioned, in an exhaust gas flow direction, on a downstream side of the scroll passage and on an upstream side of the turbine impeller; and a plate disposed on a side of the intermediate flow passage with respect to the inner circumferential wall part so as to face the intermediate flow passage such that a gap is formed between the plate and the inner circumferential wall part in an axial direction. The plate has at least one through hole through which the intermediate flow passage and the gap are communicated with each other.
    Type: Application
    Filed: December 20, 2017
    Publication date: June 3, 2021
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Bipin GUPTA, Toyotaka YOSHIDA
  • 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
  • Patent number: 10995629
    Abstract: A variable nozzle mechanism in which a nozzle mount has a first surface which has a minimum clearance in a direction of an axis with respect to a lever side facing surface in an opposing region facing the lever side facing surface in the direction of the axis, and a second surface which is disposed adjacent to the first surface in a circumferential direction of the nozzle mount and has a clearance in the direction of the axis with respect to the lever side facing surface larger than the clearance in the direction of the axis between the first surface and the lever side facing surface.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: May 4, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yuya Nakahara, Tatsuya Ishizaki, Noriyuki Hayashi, Toyotaka Yoshida
  • 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: 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: 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
  • 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: 10890109
    Abstract: This turbocharger (10) comprises a turbine wheel (12), a compressor wheel (13), and a scroll flowpath (34) formed in a turbine housing (31), continuing in the circumferential direction on the radially outer side of the turbine wheel (12), and having gas flowing therethrough that rotates and drives the turbine wheel (12). The scroll flowpath (34) is formed such that: an inner circumferential inside wall surface (34c) on the turbine wheel (12) side is gradually displaced radially outwards, along the direction of gas flow; and the cross-sectional area of the flowpath gradually decreases.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: January 12, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Toyotaka Yoshida, Yosuke Dammoto, Yoji Akiyama
  • Patent number: 10858986
    Abstract: A turbocharger includes: at least two scroll passages, and a first range of the nozzle flow passage into which the exhaust gas flowing through the first scroll passage is introduced does not overlap with a second range of the nozzle flow passage into which the exhaust gas flowing through the second scroll passage is introduced, in a circumferential direction of the nozzle flow passage.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: December 8, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Toyotaka Yoshida, Kunihiro Tomikawa
  • Patent number: 10851797
    Abstract: A turbocharger includes: a turbine wheel; a hub-side wall surface and a shroud-side wall surface which face each other and which together form a flow path for exhaust gas to flow into the turbine wheel; and a nozzle vane which has a shroud-side end surface facing the shroud-side wall surface and a hub-side end surface facing the hub-side wall surface and which is rotatably disposed in the flow path. The nozzle vane has a pressure surface which is, at least on a shroud side, oblique toward a downstream side of the exhaust gas with a distance in a vane height direction from the shroud-side end surface.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: December 1, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Bipin Gupta, Toyotaka Yoshida, Yosuke Dammoto, Yoji Akiyama
  • Patent number: 10844869
    Abstract: A turbocharger includes a turbine wheel, a hub-side wall surface and a shroud-side wall surface which face each other and which together form a flow path for exhaust gas to flow into the turbine wheel, and a plurality of nozzle vanes each of which is rotatably disposed on one of the hub-side wall surface or the shroud-side wall surface in the flow path. A throat formed between adjacent two of the plurality of nozzle vanes has a narrower throat width at a position of a first end surface of each of the adjacent two nozzle vanes facing the other of the hub-side wall surface or the shroud-side wall surface than a throat width at a middle position between the first end surface and a second end surface on an opposite side to the first end surface of each of the adjacent two nozzle vanes.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: November 24, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Bipin Gupta, Toyotaka Yoshida, Yosuke Dammoto, Yoji Akiyama
  • Publication number: 20200362721
    Abstract: A turbine includes: a turbine impeller; a housing disposed so as to enclose the turbine impeller and including a scroll passage positioned on an outer circumferential side of the turbine impeller; a nozzle vane disposed inside an intermediate flow passage which is positioned, in an exhaust gas flow direction, on a downstream side of the scroll passage and on an upstream side of the turbine impeller; a plate disposed on a side of the intermediate flow passage with respect to an inner circumferential wall part of the housing, defining an inner circumferential boundary of the scroll passage, so as to face the intermediate flow passage such that a gap is formed between the plate and the inner circumferential wall part in an axial direction; and at least one guide vane disposed in the gap between the inner circumferential wall part and the plate in the axial direction.
    Type: Application
    Filed: December 20, 2017
    Publication date: November 19, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Bipin GUPTA, Toyotaka YOSHIDA
  • Patent number: 10787955
    Abstract: A two-stage turbo system includes: a high-pressure stage turbocharger having a high-pressure stage turbine disposed in an exhaust passage of an engine; and a low-pressure stage turbocharger which includes a low-pressure stage turbine disposed downstream of the high-pressure stage turbine in the exhaust passage, and which is larger in size than the high-pressure stage turbocharger. The low-pressure stage turbine includes at least two scroll passages including a first scroll passage and a second scroll passage, which together form a scroll part for introducing exhaust gas into a nozzle flow passage of the low-pressure stage turbine. The scroll part is configured such that a first range of the nozzle flow passage into which the exhaust gas passing through the first scroll passage is introduced does not overlap with a second range of the nozzle flow passage into which the exhaust gas passing through the second scroll passage is introduced, in a circumferential direction of the nozzle flow passage.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: September 29, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Toyotaka Yoshida, Kunihiro Tomikawa
  • Patent number: 10781704
    Abstract: When A is a flow-path cross-sectional area of the scroll part, and R is a distance from a centroid of a flow-path cross-section of the scroll part to a rotational axis of the turbine rotor blade, the scroll part is configured so that a first graph, having a horizontal axis representing an angular position ? in a circumferential direction of the scroll part and a vertical axis representing ratio A/R of the flow-path cross-sectional area A to the distance R, at least partially has a concave distribution. The scroll part includes a first section belonging to a first angular range in the circumferential direction, and a second section belonging to a second angular range downstream of the first angular range in the circumferential direction and having a smaller throat width than a throat width of the first section in an axial direction of the turbine rotor blade.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: September 22, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Toyotaka Yoshida, Makoto Ozaki, Takao Yokoyama
  • Patent number: 10746025
    Abstract: Suction surfaces of blades of this radial turbine each have: a leading edge side of blade tip including a leading edge and the boundary between the suction surface and the tip; and a trailing edge side of blade tip including a trailing edge and the boundary between the suction surface and the tip. The leading edge side of blade tip forms a concave curved surface which is recessed towards the side opposite to the rotation side in a radial view. The trailing edge side of blade tip forms a convex curved surface which protrudes towards the rotation side in a radial view.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: August 18, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Toyotaka Yoshida, Takao Yokoyama
  • Patent number: 10738652
    Abstract: This turbocharger (10A) is provided with: a nozzle flow passage (35) for radially inwardly guiding gas from a scroll flow passage (34) and supplying the gas to a turbine wheel (12); and a nozzle mount (51) provided on the bearing housing (16) side of the nozzle flow passage (35). The turbocharger (10A) is further provided with: a vane (53) for adjusting the amount of introduced gas in the nozzle flow passage (35); and a heat shielding part (80) for minimizing heat transfer across the nozzle mount (51) from the turbine housing (31) side to the bearing housing (16) side.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: August 11, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Takeru Chiba, Toyotaka Yoshida