Patents Assigned to MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
  • Patent number: 10781701
    Abstract: The impeller comprises: an impeller body (21) which includes a surface part (27) formed to a fixed depth (D) from a surface (21a) thereof, and which is made of Al or an Al alloy; and an Ni—P-based electroless-plated film (23) covering the surface (21a) of the impeller body (21), wherein the surface part (27) has a first compressive residual stress (P1).
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: September 22, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventor: Takashi Arai
  • Publication number: 20200291847
    Abstract: A diffuser includes a connection section and a body section. The connection section extends from an outlet of turbine rotor blades. The body section is connected to an end of the connection section on a downstream side and has a larger flow passage sectional area than the connection section. The shape of the flow passage sectional surface of the connection section is formed into a circle at an outlet of the turbine rotor blades and is formed into an ellipse at an inlet of the body section. The shape of the flow passage sectional surface of the connection section is further formed to be gradually enlarged in a long-axis direction of the ellipse from the outlet of the turbine rotor blades toward the inlet of the body section.
    Type: Application
    Filed: December 7, 2017
    Publication date: September 17, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Toru HOSHI, Reiko TAKASHIMA, Takao YOKOYAMA
  • Patent number: 10760478
    Abstract: A multi-stage turbo supercharging system includes: a bypass passage which bypasses a turbocharger from among a plurality of turbochargers, in an intake passage or an exhaust passage of the engine; a bypass valve disposed in the bypass passage; an operation mode selection part; a bypass valve opening degree map selection part configured to select at least one bypass valve opening degree map in accordance with the operation mode selected by the operation mode selection part, from among a plurality of bypass valve opening degree maps which represent respective relationships between a plurality of control parameters of the engine and an opening degree of the bypass valve; a bypass valve opening degree determination part configured to determine an opening degree command value for the bypass valve on the basis of the bypass valve opening degree map and control parameter information representing the plurality of control parameters; and a bypass valve opening degree control part configured to control the opening degr
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: September 1, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yusuke Yashiro, Vissuta Jiwariyavej, Yoshihiro Hayashi, Byeongil An
  • Patent number: 10753269
    Abstract: A control device according to the present invention determines whether a demand load demanded of an engine exceeds a load threshold. The control device starts an electric motor if the demand load exceeds the load threshold. If the demand load is equal to or less than the load threshold, the control device performs control such that the degree of opening of an on-off valve increases monotonically with respect to the demand load. The control device switches the on-off valve from an open state to a closed state when the electric motor starts.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: August 25, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yusuke Yashiro, Yoshihiro Hayashi, Byeongil An, Yuuji Wakai
  • Patent number: 10746052
    Abstract: The present invention provides a casing for a radial compressor including: a scroll portion which is disposed on an outer circumferential side of an impeller and an intake portion and extends in a circumferential direction, has a discharge port opening in a circumferential direction and a scroll flow path through which the gas from the impeller flows toward the discharge port, and includes a resin material having a gradually increasing external shape dimension; and a plurality of ribs which connect an outer circumferential surface of the intake portion and an outer surface of the scroll portion. The plurality of ribs are provided at intervals in the circumferential direction, an installation interval gradually decreases toward the discharge port in the circumferential direction, and a length dimension in a radial direction on the outer surface of the scroll portion gradually decreases.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: August 18, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yasunori Watanabe, Ryoji Okabe, Kenichiro Iwakiri, Tadashi Kanzaka
  • 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
  • Patent number: 10731467
    Abstract: A turbine includes a housing including an inlet, an outlet, and a shroud section having a shroud surface extending between the inlet and the outlet; and a turbine impeller housed in the housing and including a hub and a plurality of blades disposed on an outer peripheral surface of the hub, each of the blades having a side edge extending along the shroud surface. The side edge of each of the blades has a side-edge upstream portion disposed on a side of the inlet, and a side-edge downstream portion disposed on a side of the outlet. The shroud surface has a shroud upstream portion disposed on the side of the inlet and extending along the side-edge upstream portion, and a shroud downstream portion disposed on the side of the outlet and extending along the side-edge downstream portion.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: August 4, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Toyotaka Yoshida, Takao Yokoyama
  • Patent number: 10731503
    Abstract: A turbocharger (10) comprising: a rotating shaft (14); a turbine wheel (12); a turbine housing (31); a scroll flowpath (34) having gas flowing therethrough that rotates and drives the turbine wheel (12); a nozzle flowpath (35) that guides gas radially inwards from the scroll flowpath (34) and supplies gas to the turbine wheel (12); and a vane (53) that adjusts the amount of gas introduced in the nozzle flowpath (35). The vane (53) comprises a guide section (60) that guides the gas flow (F) in the turbine wheel (12) radially inwards.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: August 4, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Toyotaka Yoshida, Toru Hoshi, Yosuke Dammoto, Yoji Akiyama
  • Publication number: 20200232383
    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: Application
    Filed: March 28, 2016
    Publication date: July 23, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Keigo SAKAMOTO, Yosuke DAMMOTO, Eigo KATOU, Yoji AKIYAMA, Nariaki SEIKE, Toyotaka YOSHIDA, Takeru CHIBA
  • Publication number: 20200232408
    Abstract: The present invention provides a device and method for detecting a misfire in an engine, the device being provided with: a rotation speed sensor (43) as a supercharger rotation speed measurement unit for measuring a rotation speed (Nt) of a supercharger (23); a misfire index calculation unit (51) that calculates a misfire index (Yt) from a degree of change in the rotation speed (Nt) of the supercharger (23), the rotation speed being measured by the rotation speed sensor (43); and a misfire determination unit (52) that determines a misfire in an engine (10) when the misfire index (Yt) calculated by the misfire index calculation unit (51) exceeds a pre-set determination value (D).
    Type: Application
    Filed: March 21, 2017
    Publication date: July 23, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Ryo SASE, Shintarou NOGUCHI
  • Publication number: 20200232867
    Abstract: A vibration detection device for detecting vibration of a cartridge including a bearing housing that accommodates a rotor coupling a wheel and a rotor shaft, and a bearing rotatably supporting the rotor, the bearing housing including a lubricant-oil passage port for allowing lubricant oil to pass through an interior of the bearing housing, includes: a sensor mount attached to an oil-flow-passage forming member configured to be capable of connecting to and separating from the bearing housing, the oil-flow-passage forming member including, inside thereof, an oil flow passage through which one of lubricant oil to be supplied to the interior of the bearing housing via the lubricant-oil passage port or lubricant oil discharged from the interior of the bearing housing via the lubricant-oil passage port flows; a vibration sensor disposed on the sensor mount; and a vibration transmission leg portion connected to the sensor mount and configured to be in contact with the bearing housing in a state where the oil-flow-pa
    Type: Application
    Filed: October 16, 2017
    Publication date: July 23, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Takanori SHOJI, Hideo MORI, Shota YOSHIKAWA, Yousuke DANMOTO, Shuichi MIURA
  • Publication number: 20200224564
    Abstract: An engine oil state control device for controlling a fuel mixture ratio of a fuel mixed in an engine oil of an engine on which a predetermined combustion control is performed includes comprising a fuel mixture ratio acquisition part configured to acquire the fuel mixture ratio, and an oil temperature rise control part configured to perform an oil temperature rise control for increasing an evaporation rate of the fuel mixed in the engine oil if the fuel mixture ratio is equal to or greater than a first threshold.
    Type: Application
    Filed: October 27, 2017
    Publication date: July 16, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Takayuki YAMAMOTO, Takuya KUMAGAI, Tomohide YAMADA, Kazuki NISHIZAWA
  • Publication number: 20200224584
    Abstract: A supercharger includes a magnetic flux switching motor and a wheel. The motor includes a rotor; a stator stores the rotor therein and includes stator projecting portions projecting inward in a radial direction from an internal circumferential portion toward the rotor; a field source provided in a field slot formed between the stator projecting portions to generate a magnetic field of a constant direction; an armature coil provided in an armature slot; and a controller applying a single-phase current to the armature coil and changing a direction of the applied single-phase current to change a direction of a magnetic field generated from the armature coil and rotate the rotor. The wheel is attached to the rotor, and rotates together with rotation of the rotor to compress the air.
    Type: Application
    Filed: September 25, 2017
    Publication date: July 16, 2020
    Applicants: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD., Technelec Ltd.
    Inventors: Yukio YAMASHITA, Byeongil AN, Naomichi SHIBATA, Charles POLLOCK, Helen POLLOCK
  • Publication number: 20200217329
    Abstract: A scroll shape of a compressor forms into a spiral shape a flow path of fluid discharged from a diffuser provided on a downstream side of the compressor in a fluid flow direction. The scroll shape has a scroll outer diameter that is not constant in a circumferential direction. An increase degree of a ratio A/R is set to be increased in a range from a winding start position to a winding end position of a scroll portion where A is a passage cross-sectional area of the scroll portion and R is a radius from a center of the compressor to a center of a passage cross section of the scroll portion.
    Type: Application
    Filed: March 28, 2017
    Publication date: July 9, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventor: Kenichiro IWAKIRI
  • Publication number: 20200208587
    Abstract: A method of detecting knocking includes: an in-cylinder pressure obtaining step of obtaining an in-cylinder pressure of a cylinder of the internal combustion engine at a plurality of crank angles; a heat generation rate calculation step of calculating a heat generation rate of the cylinder at each of the plurality of crank angles; an in-cylinder pressure maximizing crank angle obtaining step of obtaining an in-cylinder pressure maximizing crank angle at which the in-cylinder pressure of the cylinder of the internal combustion engine is at a maximum value; a knock determination crank angle region decision step of deciding a knock determination crank angle region which is a region between a smaller crank angle smaller than the in-cylinder pressure maximizing crank angle by a first value and a larger crank angle larger than the in-cylinder pressure maximizing crank angle by a second value; a heat generation rate differentiation step of calculating a differential value of the heat generation rate in the knock det
    Type: Application
    Filed: October 27, 2017
    Publication date: July 2, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Akihiro YUUKI, Daisuke TAKEMOTO
  • Patent number: 10697377
    Abstract: A turbine supercharger includes: a turbine; a turbine housing which houses the turbine; and a turbine bypass valve for controlling a flow rate of exhaust gas to be supplied to the turbine. The turbine housing includes, inside the turbine housing: a scroll flow passage for guiding the exhaust gas to the turbine; an outlet flow passage for discharging the exhaust gas supplied to the turbine to outside of the turbine housing; and a bypass flow passage bypassing the turbine and connecting the scroll flow passage and the outlet flow passage. The turbine bypass valve includes: a valve rod; a valve body having a flat plate shape and being configured to revolve about the valve rod; and a valve housing having a cylindrical shape and defining a part of the bypass flow passage inside the valve housing. The valve housing is fixed to an inner peripheral wall surface of the bypass flow passage, inside the turbine housing.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: June 30, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Byeongil An, Hiroshi Suzuki
  • Patent number: 10697382
    Abstract: A control apparatus of a supercharging system for supplying an engine with compressed intake air, includes: a supercharger including a compressor configured to compress the intake air to be supplied to the engine; and a controller for controlling a control device affecting operation of the compressor.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: June 30, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Tomohiro Takahashi, Takashi Ikeda, Kiyoshi Terakado, Naoyuki Mori, Vissuta Jiwariyavej
  • Publication number: 20200204051
    Abstract: A motor assembling method for an electric motor includes inserting a stator of the motor into a first housing of the motor through an opening of the first housing; fitting a shaft portion of a centering jig to an inner peripheral surface of the stator and a mounting portion of a first bearing of the motor in the first housing, and fitting a flange portion to the opening; fixing the stator on which centering is performed using the centering jig to the first housing; removing the centering jig from the first housing; and inserting a rotary shaft of the motor, the first bearing, and a second bearing of the motor into the first housing, and fixing a second housing of the motor to the opening.
    Type: Application
    Filed: August 25, 2017
    Publication date: June 25, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Byeongil AN, Naomichi SHIBATA, Yukio YAMASHITA
  • Patent number: 10690141
    Abstract: An object is to provide a seal structure capable of reducing abrasion of a seal ring without increasing the number of components and of minimizing generation of abrasion powder. A seal structure to seal clearance between an outer peripheral surface 8a of a rotary shaft 8 and an inner peripheral surface 6a of a bearing housing 6 includes: a first seal groove 22A formed on the outer peripheral surface 8a of the rotary shaft 8; a second seal groove 22B disposed between the first seal groove and the impeller; a first seal ring 26 to be mounted to the first seal groove; and a second seal ring 28 to be mounted to the second seal groove.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: June 23, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Takaya Futae, Hiroshi Suzuki, Noriyuki Hayashi, Takuya Miyazawa