Patents by Inventor Daisuke Takemoto
Daisuke Takemoto 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).
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Patent number: 11566559Abstract: A precombustion chamber gas engine includes a main-chamber forming portion forming a main combustion chamber, a precombustion-chamber forming portion forming a precombustion chamber communicating with the main combustion chamber via a plurality of nozzle holes, and an ignition device disposed in the precombustion chamber and having an ignition portion spaced from a main chamber central axis of the main combustion chamber at a predetermined distance. In a plan view, the precombustion chamber has a near-ignition region including the ignition portion and a far-ignition region opposite to the near-ignition region separated by a borderline passing through a precombustion chamber central axis of the precombustion chamber and perpendicular to a straight line passing through the precombustion chamber central axis and the ignition portion.Type: GrantFiled: September 10, 2021Date of Patent: January 31, 2023Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazutoshi Nomura, Daisuke Takemoto, Satoshi Yamada, Akihiro Yuuki, Shunya Sasaki
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Publication number: 20210404373Abstract: A precombustion chamber gas engine includes a main-chamber forming portion forming a main combustion chamber, a precombustion-chamber forming portion forming a precombustion chamber communicating with the main combustion chamber via a plurality of nozzle holes, and an ignition device disposed in the precombustion chamber and having an ignition portion spaced from a main chamber central axis of the main combustion chamber at a predetermined distance. In a plan view, the precombustion chamber has a near-ignition region including the ignition portion and a far-ignition region opposite to the near-ignition region separated by a borderline passing through a precombustion chamber central axis of the precombustion chamber and perpendicular to a straight line passing through the precombustion chamber central axis and the ignition portion.Type: ApplicationFiled: September 10, 2021Publication date: December 30, 2021Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazutoshi NOMURA, Daisuke TAKEMOTO, Satoshi YAMADA, Akihiro YUUKI, Shunya SASAKI
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Patent number: 11174778Abstract: A precombustion chamber gas engine includes a main-chamber forming portion forming a main combustion chamber, a precombustion-chamber forming portion forming a precombustion chamber communicating with the main combustion chamber via nozzle holes, and an ignition device disposed in the precombustion chamber and having an ignition portion spaced from the main chamber central axis at a predetermined distance. In a plan view, the precombustion chamber has a near-ignition region including the ignition portion and a far-ignition region opposite to the near-ignition region separated by a borderline passing through the precombustion chamber central axis and perpendicular to a straight line passing through the precombustion chamber central axis and the ignition portion. The cross-sectional area of a specific near nozzle hole which is at least one nozzle hole in the near-ignition region is smaller than the cross-sectional area of a specific far nozzle hole which is at least one nozzle hole in the far-ignition region.Type: GrantFiled: December 5, 2017Date of Patent: November 16, 2021Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazutoshi Nomura, Shunya Sasaki, Daisuke Takemoto, Satoshi Yamada, Akihiro Yuuki
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Patent number: 11143092Abstract: A precombustion chamber gas engine includes a main-chamber forming portion forming a main combustion chamber, a precombustion-chamber forming portion forming a precombustion chamber communicating with the main combustion chamber via a plurality of nozzle holes, and an ignition device disposed in the precombustion chamber and having an ignition portion spaced from a main chamber central axis of the main combustion chamber at a predetermined distance. In a plan view, the precombustion chamber has a near-ignition region including the ignition portion and a far-ignition region opposite to the near-ignition region separated by a borderline passing through a precombustion chamber central axis of the precombustion chamber and perpendicular to a straight line passing through the precombustion chamber central axis and the ignition portion.Type: GrantFiled: November 30, 2017Date of Patent: October 12, 2021Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazutoshi Nomura, Daisuke Takemoto, Satoshi Yamada, Akihiro Yuuki, Shunya Sasaki
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Patent number: 11085361Abstract: A precombustion chamber gas engine includes a main-chamber forming portion forming a main combustion chamber, a precombustion-chamber forming portion forming a precombustion chamber including a small-diameter cylinder chamber communicating with the main combustion chamber via a plurality of nozzle holes and a large-diameter cylinder chamber, an ignition device disposed in the large-diameter cylinder chamber of the precombustion chamber, and a precombustion-chamber-gas supply device for supplying a precombustion-chamber fuel gas to the precombustion chamber not via the main combustion chamber.Type: GrantFiled: December 1, 2017Date of Patent: August 10, 2021Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Daisuke Takemoto, Akihiro Yuuki, Shunya Sasaki, Kazuo Ogura, Yuta Furukawa
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Publication number: 20210015830Abstract: The present invention relates to a composition for inhibiting reactive oxygen species production, containing triterpenic acid having an acetyl group and/or a salt thereof as an active ingredient.Type: ApplicationFiled: December 26, 2018Publication date: January 21, 2021Applicant: SUNTORY HOLDINGS LIMITEDInventors: Yuki Yagita, Ayuta Funaki, Naoki Kasajima, Yoshiko Ono, Daisuke Takemoto
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Patent number: 10865719Abstract: A knocking detection method includes: a step of obtaining an oscillation waveform generated by combustion in the combustion chamber; a step of setting a first time window preceding a maximum inner pressure time at which an inner pressure of the combustion chamber is at maximum in a single combustion cycle and a second time window immediately after the maximum inner pressure time, and transforming each of a first waveform portion included in the first time window and a second waveform portion included in the second time window into an expression-domain expression, of the oscillation waveform; and a step of extracting a first peak at which amplitude of the frequency domain expression of the first waveform portion is at maximum in the first frequency windows and a second value at which the amplitude of the frequency domain region of the second waveform portion is at maximum in the second frequency window and determining whether knocking has occurred on the basis of the second peak value and the first peak value.Type: GrantFiled: December 27, 2016Date of Patent: December 15, 2020Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Akihiro Yuuki, Daisuke Takemoto, Yuta Furukawa
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Patent number: 10837373Abstract: A precombustion chamber gas engine including a precombustion chamber communicating with a main combustion chamber includes: a precombustion-chamber-fuel supply line through which a precombustion chamber fuel flows; a precombustion-chamber-fuel supply valve connected to the precombustion-chamber-fuel supply line and controlling supply of the precombustion chamber fuel to the precombustion chamber, the precombustion-chamber-fuel supply valve being configured to open when a precombustion chamber fuel line pressure, which is a pressure of the precombustion-chamber-fuel supply line, is larger than a precombustion chamber pressure, which is a pressure of the precombustion chamber; a precombustion-chamber-fuel-line-pressure adjustment valve disposed on the precombustion-chamber-fuel supply line and capable of adjusting the precombustion chamber fuel line pressure; an exhaust-precombustion-chamber-pressure acquisition unit capable of obtaining an exhaust precombustion chamber pressure which is a pressure related to tType: GrantFiled: January 24, 2018Date of Patent: November 17, 2020Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Daisuke Takemoto, Akihiro Yuuki, Yuuta Furukawa, Kazuo Ogura, Hiroyuki Endo
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Publication number: 20200325835Abstract: A knocking detection method includes: a step of obtaining an oscillation waveform generated by combustion in the combustion chamber; a step of setting a first time window preceding a maximum inner pressure time at which an inner pressure of the combustion chamber is at maximum in a single combustion cycle and a second time window immediately after the maximum inner pressure time, and transforming each of a first waveform portion included in the first time window and a second waveform portion included in the second time window into an expression-domain expression, of the oscillation waveform; and a step of extracting a first peak at which amplitude of the frequency domain expression of the first waveform portion is at maximum in the first frequency windows and a second value at which the amplitude of the frequency domain region of the second waveform portion is at maximum in the second frequency window and determining whether knocking has occurred on the basis of the second peak value and the first peak value.Type: ApplicationFiled: December 27, 2016Publication date: October 15, 2020Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Akihiro YUUKI, Daisuke TAKEMOTO, Yuta FURUKAWA
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Publication number: 20200208587Abstract: 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 detType: ApplicationFiled: October 27, 2017Publication date: July 2, 2020Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Akihiro YUUKI, Daisuke TAKEMOTO
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Patent number: 10619606Abstract: An internal combustion engine includes: an engine body (10) having at least one cylinder; and an air-supply manifold (4) including an adjustment pipe (12). The length of the adjustment pipe is set so that a first pressure wave (14A) propagating from the air-supply manifold toward the adjustment pipe and a second pressure wave (14B) propagating from the adjustment pipe toward the air-supply manifold have opposite phases from each other at the cylinder.Type: GrantFiled: January 11, 2017Date of Patent: April 14, 2020Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Daisuke Takemoto, Akihiro Yuuki, Tatsuo Ishiguro, Kazuo Ogura, Yuta Furukawa, Shinnosuke Osafune
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Publication number: 20200080467Abstract: A precombustion chamber gas engine includes a main-chamber forming portion forming a main combustion chamber, a precombustion-chamber forming portion forming a precombustion chamber communicating with the main combustion chamber via a plurality of nozzle holes, and an ignition device disposed in the precombustion chamber and having an ignition portion spaced from a main chamber central axis of the main combustion chamber at a predetermined distance. In a plan view, the precombustion chamber has a near-ignition region including the ignition portion and a far-ignition region opposite to the near-ignition region separated by a borderline passing through a precombustion chamber central axis of the precombustion chamber and perpendicular to a straight line passing through the precombustion chamber central axis and the ignition portion.Type: ApplicationFiled: November 30, 2017Publication date: March 12, 2020Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazutoshi NOMURA, Daisuke TAKEMOTO, Satoshi YAMADA, Akihiro YUUKI, Shunya SASAKI
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Publication number: 20190390613Abstract: A precombustion chamber gas engine including a precombustion chamber communicating with a main combustion chamber includes: a precombustion-chamber-fuel supply line through which a precombustion chamber fuel flows; a precombustion-chamber-fuel supply valve connected to the precombustion-chamber-fuel supply line and controlling supply of the precombustion chamber fuel to the precombustion chamber, the precombustion-chamber-fuel supply valve being configured to open when a precombustion chamber fuel line pressure, which is a pressure of the precombustion-chamber-fuel supply line, is larger than a precombustion chamber pressure, which is a pressure of the precombustion chamber; a precombustion-chamber-fuel-line-pressure adjustment valve disposed on the precombustion-chamber-fuel supply line and capable of adjusting the precombustion chamber fuel line pressure; an exhaust-precombustion-chamber-pressure acquisition unit capable of obtaining an exhaust precombustion chamber pressure which is a pressure related to tType: ApplicationFiled: January 24, 2018Publication date: December 26, 2019Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Daisuke TAKEMOTO, Akihiro YUUKI, Yuuta FURUKAWA, Kazuo OGURA, Hiroyuki ENDO
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Publication number: 20190368410Abstract: A precombustion chamber gas engine includes a main-chamber forming portion forming a main combustion chamber, a precombustion-chamber forming portion forming a precombustion chamber including a small-diameter cylinder chamber communicating with the main combustion chamber via a plurality of nozzle holes and a large-diameter cylinder chamber, an ignition device disposed in the large-diameter cylinder chamber of the precombustion chamber, and a precombustion-chamber-gas supply device for supplying a precombustion-chamber fuel gas to the precombustion chamber not via the main combustion chamber.Type: ApplicationFiled: December 1, 2017Publication date: December 5, 2019Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Daisuke TAKEMOTO, Akihiro YUUKI, Shunya SASAKI, Kazuo OGURA, Yuta FURUKAWA
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Publication number: 20190323416Abstract: A precombustion chamber gas engine includes a main-chamber forming portion forming a main combustion chamber, a precombustion-chamber forming portion forming a precombustion chamber communicating with the main combustion chamber via nozzle holes, and an ignition device disposed in the precombustion chamber and having an ignition portion spaced from the main chamber central axis at a predetermined distance. In a plan view, the precombustion chamber has a near-ignition region including the ignition portion and a far-ignition region opposite to the near-ignition region separated by a borderline passing through the precombustion chamber central axis and perpendicular to a straight line passing through the precombustion chamber central axis and the ignition portion. The cross-sectional area of a specific near nozzle hole which is at least one nozzle hole in the near-ignition region is smaller than the cross-sectional area of a specific far nozzle hole which is at least one nozzle hole in the far-ignition region.Type: ApplicationFiled: December 5, 2017Publication date: October 24, 2019Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazutoshi NOMURA, Shunya SASAKI, Daisuke TAKEMOTO, Satoshi YAMADA, Akihiro YUUKI
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Patent number: 10316733Abstract: A precombustion-chamber engine includes a cylinder, a cylinder head disposed on a top of the cylinder, and a piston reciprocably disposed within the cylinder. A main combustion chamber is defined between the piston and the cylinder head. The cylinder head includes a precombustion-chamber forming part which defines a precombustion chamber communicating with the main combustion chamber through a nozzle. The precombustion chamber includes a cylindrical first passage part extending upwardly from the nozzle, a second passage part extending upwardly from the first passage part and having an upwardly-increasing cross-sectional area, and a cylindrical space part which extends upwardly from the second passage part and in which a spark plug is disposed. Center O of a cross-section, orthogonal to straight line L, of the second passage part is eccentric with respect to straight line L composed of an axis of the first passage part and an extended line of the axis.Type: GrantFiled: December 9, 2016Date of Patent: June 11, 2019Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Daisuke Takemoto, Akihiro Yuuki, Shunya Sasaki, Kazuo Ogura, Yuta Furukawa
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Publication number: 20190055908Abstract: An internal combustion engine includes: an engine body (10) having at least one cylinder; and an air-supply manifold (4) including an adjustment pipe (12). The length of the adjustment pipe is set so that a first pressure wave (14A) propagating from the air-supply manifold toward the adjustment pipe and a second pressure wave (14B) propagating from the adjustment pipe toward the air-supply manifold have opposite phases from each other at the cylinder.Type: ApplicationFiled: January 11, 2017Publication date: February 21, 2019Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Daisuke TAKEMOTO, Akihiro YUUKI, Tatsuo ISHIGURO, Kazuo OGURA, Yuta FURUKAWA, Shinnosuke OSAFUNE
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Publication number: 20180258834Abstract: A precombustion-chamber engine includes a cylinder, a cylinder head disposed on a top of the cylinder, and a piston reciprocably disposed within the cylinder. A main combustion chamber is defined between the piston and the cylinder head. The cylinder head includes a precombustion-chamber forming part which defines a precombustion chamber communicating with the main combustion chamber through a nozzle. The precombustion chamber includes a cylindrical first passage part extending upwardly from the nozzle, a second passage part extending upwardly from the first passage part and having an upwardly-increasing cross-sectional area, and a cylindrical space part which extends upwardly from the second passage part and in which a spark plug is disposed. Center O of a cross-section, orthogonal to straight line L, of the second passage part is eccentric with respect to straight line L composed of an axis of the first passage part and an extended line of the axis.Type: ApplicationFiled: December 9, 2016Publication date: September 13, 2018Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER LTD.Inventors: Daisuke TAKEMOTO, Akihiro YUUKI, Shunya SASAKI, Kazuo OGURA, Yuta FURUKAWA
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Patent number: 9895375Abstract: The present invention relates to a composition containing riboflavin and a sesamin-class compound(s). This composition may incorporate a sesamin-class compound(s) in such an amount that the proportion (weight ratio) of its total quantity to the total quantity of riboflavin taken as unity is no more than 4.5, and it has the advantage that the analgesic and anti-fatigue actions of riboflavin are synergistically improved by ingestion of riboflavin in combination with a sesamin-class compound(s). The composition of the present invention provides compositions, in particular, pharmaceuticals as well as foods and beverages that are safe to humans, animals, etc., and can therefore be ingested for a continued period, and which have far superior effects to those of conventional foods having an analgesic or anti-fatigue action.Type: GrantFiled: November 24, 2014Date of Patent: February 20, 2018Assignee: SUNTORY HOLDINGS LIMITEDInventors: Daisuke Takemoto, Norifumi Tateishi, Yoshiko Ono, Kayo Saito, Akifumi Maeda
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Patent number: 9816430Abstract: An object is to improve a trap effect to trap ignition fuel gas supplied to a pre-combustion chamber and reduce an amount of non-combusted ignition fuel gas flowing out of the pre-combustion chamber to suppress a decrease in combustion efficiency. A pre-combustion-chamber type gas engine includes: a pre-combustion chamber Sr disposed on a cylinder head portion 10; a spark plug 20 disposed on an upper part of the pre-combustion chamber Sr; a pre-combustion-chamber gas supply mechanism configured to supply ignition fuel gas āgā to the pre-combustion chamber Sr via gas supply channels for the pre-combustion chamber 22a and 22b with an opening on an upper part of the pre-combustion chamber Sr; and a check valve 24 disposed in the gas supply channel 22b for the pre-combustion chamber.Type: GrantFiled: October 20, 2014Date of Patent: November 14, 2017Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Akihiro Yuuki, Daisuke Takemoto, Yuta Furukawa