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公开(公告)号：US10941727B2
公开(公告)日：2021-03-09
申请号：US16493841
申请日：2017-04-04
Applicant: NISSAN MOTOR CO., LTD.
Inventor： Takuma Suzuki , Yutaka Mabuchi , Yuka Suzuki
Abstract: In a piston of an internal combustion engine in which a recessed portion that holds an intake air swirling flow is formed on a crown surface of the piston, the crown surface includes a heat insulating film formation portion having a heat insulating film whose thermal conductivity is lower than a base material of the piston, the heat insulating film whose thermal capacity per volume is smaller than the base material of the piston, and a heat insulating film non-formation portion provided at a position on the more outside of a cylinder bore side of the internal combustion engine than the heat insulating film formation portion, the heat insulating film non-formation portion not having the heat insulating film.
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公开(公告)号：US10344860B2
公开(公告)日：2019-07-09
申请号：US14911757
申请日：2014-09-08
Applicant: NIPPON PISTON RING CO., LTD. , NISSAN MOTOR CO., LTD.
Inventor： Tsugane Hirase , Hiromichi Yokokawa , Kazuhiro Fujimura , Junpei Ogawa , Takaaki Kondo , Tomonori Miyazawa , Toyoki Iguchi , Takuma Suzuki
IPC: B32B15/00 , F16J9/26 , C21D9/40 , C22C38/00 , C22C38/42 , F02F5/00 , C21D1/18 , C21D6/00 , C22C38/02 , C22C38/04 , C22C38/06 , F16J9/28
Abstract: There is provided a highly heat conductive piston ring for an internal combustion engine capable of exhibiting a gas seal function and a heat transfer function for a long period of time in a stable manner when used in an automobile gasoline engine having a high compression ratio. The highly heat conductive piston ring for an internal combustion engine is a piston ring for an internal combustion engine having an Mn—Cr steel as a base material, the Mn—Cr steel including C in the range of from 0.52 to 0.65 mass %, Si in the range of from 0.15 to 0.35 mass %, Mn in the range of from 0.60 to 1.00 mass %, Cr in the range of from 0.60 to 1.00 mass %, P in the range of 0.04 mass % or less, S in the range of 0.04 mass % or less, a slight amount of components (total content of Al, Ni, and Cu) in the range of from 0.05 to 3.0 mass %, and a remnant being Fe and unavoidable impurities.
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公开(公告)号：US11433637B2
公开(公告)日：2022-09-06
申请号：US16638684
申请日：2017-08-14
Applicant: Nissan Motor Co., Ltd.
Inventor： Yuka Suzuki , Yutaka Mabuchi , Takuma Suzuki , Ken Tsutsuji
Abstract: A heat shield component includes a substrate, and a heat shield film arranged on the substrate. The heat shield film includes a first layer arranged on the substrate, including pores, and having a thermal conductivity of 0.3 W/(m·K) or less and a volumetric specific heat of 1200 kJ/(m3·K) or less, and a second layer arranged on the first layer to provide closed pores between the first layer and the second layer. The heat shield film has a surface roughness on a top surface which is 1.5 μm Ra or less. The heat shield component can achieve high heat-insulating properties and an improved effect of reducing the emission amount of hydrocarbon in an internal combustion engine, for example.
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公开(公告)号：US11987721B2
公开(公告)日：2024-05-21
申请号：US16973556
申请日：2018-06-13
Applicant: NISSAN MOTOR CO., LTD.
Inventor： Yuka Suzuki , Yutaka Mabuchi , Takuma Suzuki , Junichi Arai
IPC: C09D179/08 , C08K3/04
CPC classification number: C09D179/08 , C08K3/04 , F28F2265/10
Abstract: A heat shielding member includes a base, and a heat shielding membrane on the base.
The heat shielding membrane includes a porous layer including at least a closed pore. The porous layer includes resin and carbon-based filler. The heat shielding member has both of low thermal conductivity and low heat capacity and improves the fuel economy performance.
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公开(公告)号：US11346276B2
公开(公告)日：2022-05-31
申请号：US16981812
申请日：2018-04-10
Applicant: NISSAN MOTOR CO., LTD.
Inventor： Takuma Suzuki , Taisuke Shiraishi
Abstract: A combustion chamber structure for an internal combustion engine includes a recessed portion formed in a pent roof of a cylinder head on an upstream side of a tumble flow with respect to a spark plug.
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公开(公告)号：US20210187909A1
公开(公告)日：2021-06-24
申请号：US16638684
申请日：2017-08-14
Applicant: Nissan Motor Co., Ltd.
Inventor： Yuka Suzuki , Yutaka Mabuchi , Takuma Suzuki , Ken Tsutsuji
IPC: B32B15/088 , B32B15/20 , F02F1/00 , C23C28/04
Abstract: A heat shield component includes a substrate, and a heat shield film arranged on the substrate. The heat shield film includes a first layer arranged on the substrate, including pores, and having a thermal conductivity of 0.3 W/(m·K) or less and a volumetric specific heat of 1200 kJ/(m3·K) or less, and a second layer arranged on the first layer to provide closed pores between the first layer and the second layer. The heat shield film has a surface roughness on a top surface which is 1.5 μm Ra or less. The heat shield component can achieve high heat-insulating properties and an improved effect of reducing the emission amount of hydrocarbon in an internal combustion engine, for example.
