Patents by Inventor Yasushi Niwa

Yasushi Niwa 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).

  • Patent number: 11926771
    Abstract: A double-sided pressure-sensitive adhesive tape having excellent impact resistance, excellent reworkability, and excellent alcohol resistance. The double-sided pressure-sensitive adhesive tape includes: a base material layer; and pressure-sensitive adhesive layers arranged on both surface sides of the base material layer, wherein the pressure-sensitive adhesive layers are each formed from a pressure-sensitive adhesive composition, wherein the pressure-sensitive adhesive composition contains at least one kind selected from the group consisting of a monomer component (m) and a polymer component (P) obtained by polymerizing the monomer component (m), wherein the monomer component (m) contains 50 wt % or more of butyl (meth)acrylate, wherein a ratio of a thickness of the base material layer to a total thickness of the double-sided pressure-sensitive adhesive tape is less than 35%, and wherein the double-sided pressure-sensitive adhesive tape has a force, which is generated at 100% strain at 23° C.
    Type: Grant
    Filed: October 14, 2020
    Date of Patent: March 12, 2024
    Assignee: NITTO DENKO CORPORATION
    Inventors: Takuya Fujita, Hiromichi Sumida, Masahito Niwa, Masataka Nishiwaki, Yasushi Buzojima
  • Patent number: 10760477
    Abstract: A turbocharger engine includes a dual stage turbocharger in which a first turbo unit is disposed on the upstream side of a second turbo unit on an exhaust passage. The turbocharger is disposed in such a manner that a second turbine shaft of the second turbo unit is far from an engine output shaft than a first turbine shaft of the first turbo unit in a plan view in an axis direction of a cylinder. Further, a second turbine is rotated clockwise around an axis thereof in a side view when the turbocharger is viewed from the side of the turbine, and an intra-turbine passage is disposed on the side of an engine body than the second turbine shaft.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: September 1, 2020
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Yasushi Niwa, Yoshiyuki Uehane, Keiji Araki
  • Patent number: 10670148
    Abstract: An internal combustion engine gasket includes a plurality of annular plates that are stacked. Each of the annular plates includes: a through-hole; an inner circumferential portion; a plurality of bolt holes; an outer circumferential portion; and an intermediate portion. The annular plates includes: a grommet plate having a fold-back portion in the inner circumferential portion; and first and second seal plates stacked on both sides of the grommet plate, and having a bead in the intermediate portion. The inner circumferential portion of the first seal plate is wrapped or held by the fold-back portion of the grommet plate. A spacer member is formed between the grommet plate and the first or second seal plate along the entire circumference of the outer circumferential portion so as to have a thickness smaller than or equal to the grommet plate and include all of the bolt holes.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: June 2, 2020
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Yasushi Niwa, Kazuya Niida
  • Patent number: 10436098
    Abstract: An engine equipped with a turbo supercharger has an exhaust manifold coupled to an engine body, a turbo supercharger including a turbine housing demarcating a turbine chamber and a supply path of exhaust air, and a turbine insulator covering the same, and a manifold insulator covering at least the upper surface of the exhaust manifold and the side surface of the exhaust manifold on the turbo supercharger side. The exhaust manifold has a flange as a connection section with respect to the turbo supercharger. The manifold insulator has a cut-away section exposing a joining surface of the flange, and an opening caused by having the interval between the cut-away edge of the cut-away section and the outer peripheral edge of the flange be relatively wider in a predetermined position than in other positions.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: October 8, 2019
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Yasushi Niwa, Hiroshi Sumimoto, Kazuya Niida
  • Patent number: 10415458
    Abstract: A vehicle with a turbocharged engine, including an engine body, an intake passage, an exhaust passage, a turbocharger, and a radiator. The radiator is provided with a cooling unit for cooling an engine coolant, and an upper tank into which the coolant is introduced after cooling the engine body. The turbocharger is provided with a turbine provided to the exhaust passage, a compressor provided to the intake passage, a coupling shaft coupling the turbine to the compressor, and bearings supporting the coupling shaft. The turbine is provided with an impeller for being rotated by introduced exhaust gas, and a turbine casing. The turbocharger is oil-cooled, and cooled by a lubricant. The turbine casing is formed from a sheet metal. The coupling shaft extends horizontally, and a height of an axial center of the shaft is above a height of an upper end of the upper tank of the radiator.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: September 17, 2019
    Assignee: Mazda Motor Corporation
    Inventors: Yasushi Niwa, Mitsuhiro Nakajima
  • Patent number: 10316738
    Abstract: A turbocharger engine includes an engine body and a turbocharger. The turbocharger includes a large turbo unit having a large turbine chamber, a large compressor chamber, and a large turbine shaft extending between the two chambers; and a small turbo unit having a small turbine chamber, a small compressor chamber, and a small turbine shaft extending between the two chambers. The large compressor chamber is disposed upstream of the small compressor chamber in an intake passage. A large turbo axis and a small turbo axis are disposed to extend generally in the same direction as an engine output axis. The large turbo unit is disposed such that the large turbo axis is non-parallel to the engine output axis, and a large-compressor-chamber-side portion of the large turbo axis is closer to the engine output axis than a large-turbine-chamber-side portion thereof in a plan view in an axis direction of the cylinder.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: June 11, 2019
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Yasushi Niwa, Hiroshi Sumimoto, Mitsuhiro Nakajima
  • Patent number: 10309283
    Abstract: An exhaust device of an engine is provided, which includes an exhaust port formed in a cylinder head and connected to an exhaust aperture of a cylinder, an exhaust manifold disposed on a side surface of the cylinder head and formed with a first exhaust passage, an exhaust path constituting part disposed on a side of the exhaust manifold opposite from the cylinder head, and formed with a second exhaust passage, a catalyst disposed on a downstream side of the exhaust path constituting part, an upstream gasket disposed between the side surface of the cylinder head and an upstream connecting member of the manifold, and a downstream gasket disposed between a downstream connecting member of the manifold and an exhaust-manifold-side connecting member of the exhaust path constituting part. The upstream gasket has a larger thermal resistance in an exhaust gas flow direction than the downstream gasket.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: June 4, 2019
    Assignee: Mazda Motor Corporation
    Inventors: Yasushi Niwa, Kazuya Niida
  • Publication number: 20190040787
    Abstract: An engine equipped with a turbo supercharger has an exhaust manifold coupled to an engine body, a turbo supercharger including a turbine housing demarcating a turbine chamber and a supply path of exhaust air, and a turbine insulator covering the same, and a manifold insulator covering at least the upper surface of the exhaust manifold and the side surface of the exhaust manifold on the turbo supercharger side. The exhaust manifold has a flange as a connection section with respect to the turbo supercharger. The manifold insulator has a cut-away section exposing a joining surface of the flange, and an opening caused by having the interval between the cut-away edge of the cut-away section and the outer peripheral edge of the flange be relatively wider in a predetermined position than in other positions.
    Type: Application
    Filed: February 28, 2017
    Publication date: February 7, 2019
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Yasushi NIWA, Hiroshi SUMIMOTO, Kazuya NIIDA
  • Patent number: 10145297
    Abstract: Disclosed is a controller for a turbocharged engine. The engine includes a supercharger configured to supercharge intake air using an exhaust gas from the engine, and including movable flaps arranged so that a boost pressure generated in an intake passage is adjustable. If a rotational speed of a turbine and compressor that constitute the supercharger has reached a first threshold lower than an endurance limit, an amount of fuel injected to the engine is reduced to a predetermined amount. If the rotational speed has reached a second threshold lower than the first threshold, the amount of fuel injected is reduced in accordance with an excess of the rotational speed over the second threshold.
    Type: Grant
    Filed: January 19, 2015
    Date of Patent: December 4, 2018
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Amane Tsuda, Hiroaki Deguchi, Kenjiro Konomi, Nobuo Yunoki, Yasushi Niwa, Kazuya Niida
  • Publication number: 20180283266
    Abstract: An engine with a turbo supercharger has a first turbo and a second turbo. A first upstream section that is a scroll starting point of a first scroll passage of the first turbo and a second upstream section that is the scroll starting point of a second scroll passage of the second turbo are disposed, respectively, on a side that is farther than a first turbine shaft and a side that is farther than a second turbine shaft with respect to an engine body. The first and second scroll passages are passages scrolled so that downstream sides of the first and second upstream sections face a side closer to the engine body than the respective turbine shafts are, and scroll in opposite directions to each other. Consequently, a first turbine and a second turbine rotate in opposite directions to each other.
    Type: Application
    Filed: March 21, 2017
    Publication date: October 4, 2018
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Yasushi NIWA, Mitsuhiro NAKAJIMA
  • Patent number: 10087868
    Abstract: An abnormality detector of a turbocharged engine includes: a compressor including a plurality of blades that are detected portions; and a detecting portion configured to electrically detect the plurality of blades. Each time the blades are detected a predetermined number of times, one pulse having a pulse width corresponding to a measurement time required to detect the blades is output, and a turbo revolution is calculated from the pulse width of the output pulse. When it is judged that a rotation change of the rotating body which change is calculated based on a pulse width of a first pulse and a pulse width of a second pulse output after the first pulse exceeds a predetermined rate in a region where the rotating body exceeds a predetermined revolution, it is determined that an abnormality of the blade or an electromagnetic noise abnormality of the detecting portion occurs.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: October 2, 2018
    Assignee: Mazda Motor Corporation
    Inventors: Amane Tsuda, Hiroaki Deguchi, Kenjiro Konomi, Nobuo Yunoki, Yasushi Niwa, Kazuya Niida
  • Publication number: 20180266558
    Abstract: An internal combustion engine gasket includes a plurality of annular plates that are stacked. Each of the annular plates includes: a through-hole; an inner circumferential portion; a plurality of bolt holes; an outer circumferential portion; and an intermediate portion. The annular plates includes: a grommet plate having a fold-back portion in the inner circumferential portion; and first and second seal plates stacked on both sides of the grommet plate, and having a bead in the intermediate portion. The inner circumferential portion of the first seal plate is wrapped or held by the fold-back portion of the grommet plate. A spacer member is formed between the grommet plate and the first or second seal plate along the entire circumference of the outer circumferential portion so as to have a thickness smaller than or equal to the grommet plate and include all of the bolt holes.
    Type: Application
    Filed: March 16, 2017
    Publication date: September 20, 2018
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Yasushi NIWA, Kazuya NIIDA
  • Patent number: 10047674
    Abstract: An exhaust device for an engine includes an engine main body having a cylinder head provided with a manifold exhaust passage formed with a gathering exhaust port, a turbo supercharger, a catalyst device provided adjacent to the turbo supercharger, and a processing device disposed on the same side as the cylinder head surface of the engine main body. The processing device includes an exhaust gas processing device and an EGR device. The turbo supercharger guides exhaust gas discharged from the gathering exhaust port upward. The catalyst device includes a carrier, and a container which allows the exhaust gas to pass through a lower region of the carrier. The EGR device and the exhaust gas processing device are at least disposed below the catalyst device.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: August 14, 2018
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Amane Tsuda, Hiroaki Deguchi, Yasushi Niwa, Noriyuki Maruoka, Kazuya Niida, Kentaro Nomura
  • Publication number: 20170362986
    Abstract: An exhaust device of an engine is provided, which includes an exhaust port formed in a cylinder head and connected to an exhaust aperture of a cylinder, an exhaust manifold disposed on a side surface of the cylinder head and formed with a first exhaust passage, an exhaust path constituting part disposed on a side of the exhaust manifold opposite from the cylinder head, and formed with a second exhaust passage, a catalyst disposed on a downstream side of the exhaust path constituting part, an upstream gasket disposed between the side surface of the cylinder head and an upstream connecting member of the manifold, and a downstream gasket disposed between a downstream connecting member of the manifold and an exhaust-manifold-side connecting member of the exhaust path constituting part. The upstream gasket has a larger thermal resistance in an exhaust gas flow direction than the downstream gasket.
    Type: Application
    Filed: June 8, 2017
    Publication date: December 21, 2017
    Inventors: Yasushi Niwa, Kazuya Niida
  • Publication number: 20170342895
    Abstract: A turbocharger engine includes an engine body and a turbocharger. The turbocharger includes a large turbo unit having a large turbine chamber, a large compressor chamber, and a large turbine shaft extending between the two chambers; and a small turbo unit having a small turbine chamber, a small compressor chamber, and a small turbine shaft extending between the two chambers. The large compressor chamber is disposed upstream of the small compressor chamber in an intake passage. A large turbo axis and a small turbo axis are disposed to extend generally in the same direction as an engine output axis. The large turbo unit is disposed such that the large turbo axis is non parallel to the engine output axis, and a large-compressor-chamber-side portion of the large turbo axis is closer to the engine output axis than a large-turbine-chamber-side portion thereof in a plan view in an axis direction of the cylinder.
    Type: Application
    Filed: May 31, 2017
    Publication date: November 30, 2017
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Yasushi NIWA, Hiroshi SUMIMOTO, Mitsuhiro NAKAJIMA
  • Publication number: 20170342894
    Abstract: A turbocharger engine includes a dual stage turbocharger in which a first turbo unit is disposed on the upstream side of a second turbo unit on an exhaust passage. The turbocharger is disposed in such a manner that a second turbine shaft of the second turbo unit is far from an engine output shaft than a first turbine shaft of the first turbo unit in a plan view in an axis direction of a cylinder. Further, a second turbine is rotated clockwise around an axis thereof in a side view when the turbocharger is viewed from the side of the turbine, and an intra-turbine passage is disposed on the side of an engine body than the second turbine shaft.
    Type: Application
    Filed: May 31, 2017
    Publication date: November 30, 2017
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Yasushi NIWA, Yoshiyuki UEHANE, Keiji ARAKI
  • Publication number: 20170314457
    Abstract: A vehicle with a turbocharged engine, including an engine body, an intake passage, an exhaust passage, a turbocharger, and a radiator. The radiator is provided with a cooling unit for cooling an engine coolant, and an upper tank into which the coolant is introduced after cooling the engine body. The turbocharger is provided with a turbine provided to the exhaust passage, a compressor provided to the intake passage, a coupling shaft coupling the turbine to the compressor, and bearings supporting the coupling shaft. The turbine is provided with an impeller for being rotated by introduced exhaust gas, and a turbine casing. The turbocharger is oil-cooled, and cooled by a lubricant. The turbine casing is formed from a sheet metal. The coupling shaft extends horizontally, and a height of an axial center of the shaft is above a height of an upper end of the upper tank of the radiator.
    Type: Application
    Filed: April 17, 2017
    Publication date: November 2, 2017
    Inventors: Yasushi Niwa, Mitsuhiro Nakajima
  • Publication number: 20170138291
    Abstract: An abnormality detector of a turbocharged engine includes: a compressor including a plurality of blades that are detected portions; and a detecting portion configured to electrically detect the plurality of blades. Each time the blades are detected a predetermined number of times, one pulse having a pulse width corresponding to a measurement time required to detect the blades is output, and a turbo revolution is calculated from the pulse width of the output pulse. When it is judged that a rotation change of the rotating body which change is calculated based on a pulse width of a first pulse and a pulse width of a second pulse output after the first pulse exceeds a predetermined rate in a region where the rotating body exceeds a predetermined revolution, it is determined that an abnormality of the blade or an electromagnetic noise abnormality of the detecting portion occurs.
    Type: Application
    Filed: February 18, 2015
    Publication date: May 18, 2017
    Applicant: Mazda Motor Corporation
    Inventors: Amane Tsuda, Hiroaki Deguchi, Kenjiro Konomi, Nobuo Yunoki, Yasushi Niwa, Kazuya Niida
  • Publication number: 20170067394
    Abstract: Disclosed is a controller for a turbocharged engine. The engine includes a supercharger configured to supercharge intake air using an exhaust gas from the engine, and including movable flaps arranged so that a boost pressure generated in an intake passage is adjustable. If a rotational speed of a turbine and compressor that constitute the supercharger has reached a first threshold lower than an endurance limit, an amount of fuel injected to the engine is reduced to a predetermined amount. If the rotational speed has reached a second threshold lower than the first threshold, the amount of fuel injected is reduced in accordance with an excess of the rotational speed over the second threshold.
    Type: Application
    Filed: January 19, 2015
    Publication date: March 9, 2017
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Amane TSUDA, Hiroaki DEGUCHI, Kenjiro KONOMI, Nobuo YUNOKI, Yasushi NIWA, Kazuya NIIDA
  • Publication number: 20150240750
    Abstract: An exhaust device for an engine includes an engine main body having a cylinder head provided with a manifold exhaust passage formed with a gathering exhaust port, a turbo supercharger, a catalyst device provided adjacent to the turbo supercharger, and a processing device disposed on the same side as the cylinder head surface of the engine main body. The processing device includes an exhaust gas processing device and an EGR device. The turbo supercharger guides exhaust gas discharged from the gathering exhaust port upward. The catalyst device includes a carrier, and a container which allows the exhaust gas to pass through a lower region of the carrier. The EGR device and the exhaust gas processing device are at least disposed below the catalyst device.
    Type: Application
    Filed: February 24, 2015
    Publication date: August 27, 2015
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Amane TSUDA, Hiroaki DEGUCHI, Yasushi NIWA, Noriyuki MARUOKA, Kazuya NIIDA, Kentaro NOMURA