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Piston Rings for Internal Combustion Engines
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A technology for piston rings and internal combustion engines, which is applied to piston rings, mechanical equipment, engine components, etc., can solve problems such as the reduction of anti-aluminum adhesion, and achieve the effect of preventing aluminum adhesion and restraining the amount of wear.
Inactive Publication Date: 2017-11-21
RIKEN CO LTD
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Problems solved by technology
[0008] However, in the case of the coatings described in Patent Documents 1 and 2, when the temperature inside the engine rises, there is a problem that the aluminum sticking resistance decreases.
Method used
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Embodiment 1
[0078]
[0079] Hereinafter, examples of the present invention will be described.
[0080] Coatings having the materials, Vickers hardness HV, surface roughness, and film thickness shown in Tables 1 to 3 were formed on the upper and lower sides of the base material for piston rings made of low-chromium steel. Here, by Al 2 o 3 , ZrO 2 , Y 2 o 3 and TiO 2 The coating composed of any one of them is formed by a known method of directly laminating ceramic fine particles or vaporized ceramic fine particles on the surface, and is made of Cr 2 o 3 , MgO, 3Al 2 o 3 -2SiO2 2 , 2MgO-SiO 2 and Al 2 o 3 -40%TiO 2 The coating composed of any one of them is formed by sputtering, and is made of SiC, Si 3 N 4 , SiO 2 The coating film composed of any one of AlN, AlN is formed by the CVD method, and the coating film composed of any one of TiN, CrN, and CrC is formed by the PVD method. Thus, for example, in the case of Invention Example 1, the first film made of SiC is formed ...
Embodiment 2
[0133]
[0134] Coatings having the materials, Vickers hardness HV, surface roughness, and film thickness shown in Tables 4 to 6 were formed on the upper and lower sides of the base material for piston rings made of low-chromium steel. Here, by Al 2 o 3 , ZrO 2 , Y 2 o 3 and TiO 2 The coating composed of any one of them is formed by a known method of directly laminating ceramic fine particles or vaporized ceramic fine particles on the surface, and is made of Cr 2 o 3 , MgO, 3Al 2 o 3 -2SiO2 2 , 2MgO-SiO 2 and Al 2 o 3 -40%TiO 2 The coating composed of any one of them is formed by sputtering, and is made of SiC, Si 3 N 4 , SiO 2 A film composed of any one of , AlN is formed by the CVD method, and a film composed of any one of TiN, CrN, CrC, and DLC is formed by the PVD method. PAI, PBI, PI, PAR, resin film A And the resin film B is formed by spraying, PEEK, PPS, and PES are formed by flow dipping, and Cu, Ag, Au, Sn, In, and Ni are formed by electroplating. T...
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Abstract
The present invention provides a piston ring for an internal combustion engine capable of preventing aluminum adhesion for a long period of time and suppressing wear of piston components even under high-temperature and high-load conditions. The piston ring for an internal combustion engine is a piston ring (1) for an internal combustion engine that is coated with an anti-aluminum adhesion film (12) on at least one of the upper and lower sides of the base material (11) for the piston ring. The aluminum adhesivecoating (12) has a first coating (12a) and a second coating (12b), the first coating (12a) is formed on the piston ring base material (11) and is made of a first ceramic material , the second coating (12b) is formed on the first coating (12a) and has a Vickers hardness HV smaller than that of the first ceramic material.
Description
technical field [0001] The present invention relates to a piston ring for an internal combustion engine, and particularly to a piston ring for an internal combustion engine capable of preventing aluminum adhesion for a long period of time even under high temperature and high load conditions and capable of suppressing the amount of wear of piston parts. Background technique [0002] The three piston rings used in internal combustion engines, the top ring, the second ring, and the oil ring, are arranged so as to engage with ring grooves provided on the surface of the piston, and have a gas sealing function that prevents combustion gas from leaking from the combustion chamber to the outside. , the heat conduction function of transferring the heat of the piston to the cooled cylinder wall to cool the piston, and the function of supplying an appropriate amount of engine oil as lubricating oil to the cylinder wall and scraping off excess oil. [0003] These three piston rings repe...
Claims
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Application Information
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