Patents Assigned to MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
  • Patent number: 10683798
    Abstract: The present invention provides a turbocharger including: a rotating shaft; a turbine wheel; a compressor wheel; a rolling bearing including an inner race fixed to an outer circumferential surface of the rotating shaft, an outer race surrounding the inner race from the outside in a radial direction, and rolling bodies arranged between the inner and outer races and that supports the rotating shaft to be rotatable about an axis; a housing that covers the rolling bearing from an outer circumferential side via a gap between the housing and an outer circumferential surface of the rolling bearing; and a lubricant supply line configured to supply a lubricant into the housing. The turbocharger includes an operating state detection unit that detects an operating state of the turbocharger and a lubricant regulating unit configured to regulate the flow rate of the lubricant flowing through the lubricant supply line depending on the operating state.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: June 16, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yoshitomo Noda, Motoki Ebisu, Hiroshi Suzuki
  • Patent number: 10683870
    Abstract: This impeller cover is provided with: a machinable abradable seal section which has a shroud surface, which faces the outer peripheral surface of an impeller rotating about its axis, and which provides a seal between the outer peripheral surface and the shroud surface; a cover body which covers the impeller from the outside and which has a seal housing section for housing the abradable seal section therein; and a filling material which is interposed between the abradable seal section and the cover body.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: June 16, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Ryoji Okabe, Yasunori Watanabe, Isao Tomita, Takashi Arai, Hiroyuki Arimizu
  • Patent number: 10683874
    Abstract: A multi-stage electric centrifugal compressor including an electric motor free from risk of breakdown of an operation control part due to heat generated by low-pressure stage and high-pressure stage compressors. Includes an electric motor; a pair of centrifugal compressors comprising a low-pressure stage compressor and a high-pressure stage compressor connected in series; a heat-shielding plate configured to shield heat generated by the low-pressure stage compressor; and a bending portion disposed in middle of the heat-shielding plate, and extending along a rotational shaft of the electric motor so as to surround an outer periphery of the rotational shaft. An inner surface of the bending portion faces the rotational shaft via a clearance part, and the bending portion functions as a shaft sealing portion which prevents leakage of intake air from the low-pressure stage compressor.
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: June 16, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Byeongil An, Hiroshi Suzuki
  • Publication number: 20200182261
    Abstract: Provided is a vibration suppressing method for a supercharger, the supercharger including a shaft, a wheel arranged at one end or the other end of the shaft, and a housing including a wheel cover accommodating the wheel; the method including a determining step of determining a suppression target oscillation frequency to be a suppression target from among oscillation frequencies of the housing vibrating with shaft vibration of the shaft transmitted thereto, a preparing step of preparing a vibration suppressing unit having a natural frequency to be tuned in to the suppression target oscillation frequency, and an attaching step of attaching the vibration suppressing unit prepared in the preparing step onto an outer face of the housing.
    Type: Application
    Filed: November 24, 2017
    Publication date: June 11, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Shinji OGAWA, Naoyuki NAGAI, Yosuke DANMOTO, Tomoaki TAKESHITA, Hiroyuki HOSOYA, Takaya FUTAE
  • Patent number: 10677149
    Abstract: A surge avoidance control method that includes a surge detection step of determining whether the operation point of the compressor is positioned in a surge operation region at each predetermined timing; a surge avoidance opening-degree calculation step calculating a surge avoidance opening degree of the operation device necessary for moving the operation point of the compressor determined to be positioned in the surge operation region in the surge detection step out of the surge operation region; a correction opening-degree calculation step calculating a correction opening degree of the operation device on the basis of a moving velocity of the operation point of the compressor which is determined to be positioned in the surge operation region in the surge detection step; and an opening-degree command value calculation step calculating an opening-degree command value of the operation device on the basis of the surge avoidance opening degree and the correction opening degree.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: June 9, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Ryo Sase, Naoki Yahata
  • Patent number: 10677148
    Abstract: A variable displacement exhaust turbocharger is provided with a plurality of nozzle vanes that are rotatably supported by a nozzle mount, a drive ring that is interlocked with an actuator and fits to a guide part of the nozzle mount, a lever plate having one end coupled to the drive ring and the other end coupled to the nozzle vane, and a variable nozzle mechanism that varies the vane angle of the nozzle vane by rotating the drive ring. A bulge suppressing portion is provided for absorbing bulging occurring on an outer peripheral surface of the guide part, the bulging being caused by the press-fitting of a nail pin into a press-fitting hole in a direction slightly toward the rotational axis with respect to the guide section and following the axial direction of the nozzle mount.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: June 9, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Naoto Tashiro, Yasuaki Jinnai, Hiroyuki Arimizu
  • Patent number: 10677146
    Abstract: A power supply device includes a first power supply circuit, a second power supply circuit, and a power supply-switching unit. The first power supply circuit includes a power storage device having a first capacity and supplies electricity of a first voltage to the electric motor. The second power supply circuit includes a power storage device having a second capacity smaller than the first capacity and supplies electricity of a second voltage higher than the first voltage to the electric motor. The power supply-switching unit supplies electricity from the second power supply circuit to the electric motor at the tune of starting an operation of the electric motor and thereafter supplies electricity from the first power supply circuit to the electric motor.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: June 9, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Tetsuro Shigemizu, Yukio Yamashita
  • Publication number: 20200173461
    Abstract: A centrifugal compressor includes a housing which includes a scroll portion with a spiral scroll flow passage being formed on an outer peripheral side of an impeller, and a diffuser portion with a diffuser flow passage being formed, the diffuser flow passage extending along the scroll flow passage on a radially inner side of the scroll flow passage and communicating with the scroll flow passage. The diffuser flow passage includes an inner flow passage portion extending from an inlet portion of the diffuser flow passage to a throat portion with a flow passage height thereof decreasing, and an outer flow passage portion extending from the throat portion to an outlet portion of the diffuser flow passage.
    Type: Application
    Filed: November 16, 2017
    Publication date: June 4, 2020
    Applicant: Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
    Inventor: Yoshihiro HAYASHI
  • Publication number: 20200177050
    Abstract: A motor includes: a motor housing; a stator disposed inside the motor housing and supported by the motor housing; and a thermally conductive sheet disposed so as to fill a gap in a radial direction or an axial direction between the motor housing and the stator.
    Type: Application
    Filed: November 20, 2017
    Publication date: June 4, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Vissuta JIWARIYAVEJ, Yukio YAMASHITA
  • Publication number: 20200166052
    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: Application
    Filed: March 30, 2016
    Publication date: May 28, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Takao YOKOYAMA, Yutaka FUJITA
  • Publication number: 20200165994
    Abstract: An engine abnormality detection device for detecting variation of a combustion state of each of a plurality of cylinders of an engine, the engine abnormality detection device includes: a rotation information acquisition part configured to obtain rotation information related to a rotation state of the engine; a frequency analysis part configured to perform frequency analysis of the rotation information, the frequency analysis part being configured to calculate a component of fNe and a component fcyl through the frequency analysis of the rotation information, where fNe is a frequency of a single cycle of the engine and fcyl is a frequency of pulsation of the engine; and a detection part configured to detect variation of exhaust energy of each cylinder on the basis of the component of fNe and the component of fcyl.
    Type: Application
    Filed: December 27, 2017
    Publication date: May 28, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Ryo SASE, Shintarou NOGUCHI
  • Publication number: 20200166051
    Abstract: A centrifugal compressor (P) is provided with: a casing (10) which forms an impeller inlet flow path (11), an impeller flow path (12), an impeller outlet flow path (13), and a scroll (14); and an impeller (3) which is arranged in the impeller flow path (11), wherein the casing (10) is provided with a casing body (15) and a heat conduction inhibiting part (16) which is disposed to heat conduction paths to the impeller inlet flow path (11) from at least the impeller outlet flow path (13) and the scroll (14) so as to inhibit heat conduction to the impeller inlet flow path (11) from at least the impeller outlet flow path (13) and the scroll (14).
    Type: Application
    Filed: February 15, 2016
    Publication date: May 28, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Tadashi KANZAKA, Yosuke DAMMOTO, Yoji AKIYAMA, Takao YOKOYAMA
  • Publication number: 20200158010
    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: Application
    Filed: October 26, 2017
    Publication date: May 21, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yoshimi KAGIMOTO, Tatsuya ISHIZAKI, Yuta ISHII
  • Patent number: 10648402
    Abstract: This control device starts an electric motor on the basis of a drive signal. After starting of the electric motor, the control device switches a bypass valve from an open state to a closed state.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: May 12, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yusuke Yashiro, Yoshihiro Hayashi, Byeongil An, Yuuji Wakai
  • Patent number: 10641155
    Abstract: A regeneration control device for an exhaust gas treatment device includes: a DOC blockage risk state determination part configured to determine whether the DOC is in a blockage risk state which is a state where blockage of the DOC is likely to occur, on the basis of comparison between a counter value and a threshold related to an operation time of the diesel engine; a DOC temperature increase execution part configured to execute a blockage recovery process for increasing a temperature of the DOC to a first temperature, if it is determined that the DOC is in the blockage risk state; a DPF forced regeneration condition determination part configured to determine whether a forced regeneration execution condition for the DPF is satisfied; a DPF forced regeneration execution part configured to execute a forced regeneration process for increasing a temperature of the DPF to a second temperature and increasing the temperature of the DOC to the first temperature, if the forced regeneration execution condition is sati
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: May 5, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Kazuki Nishizawa, Tomohide Yamada, Daisuke Sato, Hiroyuki Ito
  • Patent number: 10641330
    Abstract: Reduce bearing loss due to lubricating oil using a rotary shaft; a journal bearing that is provided to the rotary shaft and that rotatably supports the rotary shaft; a flange part having an opposing surface part that is arranged so as to oppose a side surface part of the journal bearing with a gap therebetween in the axial direction in which the rotary shaft extends; and a recess part provided in the side surface part or the opposing surface part. In the projected area of the journal bearing in the axial direction, the area of a section including the recess part and not forming the gap is larger than the area in which the side surface part and the opposing surface part form the gap.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: May 5, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Takaya Futae, Takashi Nambu, Tatsuya Ishizaki, Seigi Yano
  • Patent number: 10641165
    Abstract: This turbocharger includes a rotating shaft extending along an axis, a turbine wheel provided at a first end portion of the rotating shaft, a compressor wheel provided at a second end portion of the rotating shaft, a housing accommodating at least a portion of the rotating shaft, bearings provided in the housing and configured to support the rotating shaft, supply flow paths supplying lubricating oil to the bearings, a discharge oil chamber formed in the housing and to which the lubricating oil is discharged from the bearings, and an oil drainage port formed below the discharge oil chamber, in which at least one of the discharge oil chamber and the oil drainage port is formed to be asymmetric between a first region and a second region defined by a vertical plane including the axis of the rotating shaft as a boundary plane.
    Type: Grant
    Filed: December 25, 2015
    Date of Patent: May 5, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Takashi Nambu, Naomichi Shibata, Shuichi Isayama, Takaya Futae, Yuya Kojima
  • Patent number: 10634042
    Abstract: A rotating machine includes a rotating body configured to rotate around a central axis, and a casing configured to accommodate at least a part of the rotating body, and the casing, includes a main section made of a metallic material, and a high-porosity section made of the same material as the main section and having a porosity higher than the main section.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: April 28, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Takao Yokoyama, Hiroshi Suzuki, Yosuke Dammoto, Tadashi Kanzaka, Atsushi Takita
  • Patent number: 10634150
    Abstract: A method of detecting surging in a turbocharger provided for an internal combustion engine, includes: a first characteristic quantity calculation step of calculating a first characteristic quantity in at least one first frequency region corresponding to at least one first peak frequency component unique to the time of occurrence of surging in the turbocharger on the basis of a time-variable waveform indicating a time-series change of a rotation speed of the turbocharger; a second characteristic quantity calculation step of calculating a second characteristic quantity in a second frequency region including the at least one first frequency region on the basis of the time-variable waveform; and a detection step of detecting surging in the turbocharger on the basis of a relationship between the first characteristic quantity and the second characteristic quantity.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: April 28, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Ryo Sase, Naoki Yahata
  • Publication number: 20200123931
    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: Application
    Filed: March 31, 2016
    Publication date: April 23, 2020
    Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Yasunori WATANABE, Ryoji OKABE, Kenichiro IWAKIRI, Tadashi KANZAKA