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JP2019127835A |
To improve in-cylinder sealing performance by a piston ring while suppressing the generation of the backlash of the piston ring.In this piston of an internal combustion engine, a diameter of a top land is formed smaller than a diameter o...
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JP6549133B2 |
The invention relates to a sliding element, in particular a piston ring, having a carbon-based coating and at least in sections, a surface roughness (RΔq) according to DIN EN ISO 4287 of 0.05, preferably 0.08, to 0.11, preferably to 0.1...
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JP2019120403A |
To provide a piston ring capable of suppressing agglutination of abrasion powder of a piston, even in a case where the piston ring rotates in a circumferential direction with respect to the piston.A piston ring 1 comprises: an outer peri...
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JP2019116918A |
To provide an improved two-piece oil ring body ring by making further device in the ring body while performing appropriate oil control, so that the ring tension can be reduced compared to conventional products, and to improve an oil ring...
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JP2019116954A |
To provide a piston ring capable of securing sealability of lubricant and combustion gas with agglutination suppressed.A piston ring 1 has one or more recess parts formed on at least one surface of an upper surface and a lower surface, a...
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JP6546274B2 |
A piston for a high temperature internal combustion engine is provided. The piston includes an upper wall, base wall, outer rib, and inner rib defining a cooling chamber therebetween, and a plurality of ring grooves formed in the outer r...
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JP6543331B2 |
Provided is a combined oil ring in which carbon sludge and the like are not deposited between side rails and a spacer expander even if an internal combustion engine is operated for a long period of time. A combined oil ring is configured...
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JP2019108935A |
To provide an oil ring for maintaining its wedge effect even when a side rail tilts.A oil ring 13 which is received in an oil ring groove 8 recessed in the outer peripheral face of a piston 4, includes an upper side rail 16 and a lower s...
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JP2019108934A |
To provide an oil ring for reducing frictional loss while maintaining the capability of scraping oil off.An oil ring 13 which is received in an oil ring groove 8 formed in the outer peripheral face of a piston 4 for slide contact with th...
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JP6534788B2 |
The method involves arranging piston ring package on a piston crown which is set between piston top portion and combustion chamber from underside of piston, so that the piston ring package is set in frictional contact with running surfac...
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JP6534066B2 |
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JP6533670B2 |
A side rail (1) is formed in a sprit ring shape with an opening (10) and to be mounted on a space expander (2) in an annular shape to constitute, together with the space expander (2), a multi-piece oil ring (3) used in an internal combus...
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JP6533818B2 |
A sliding member having a hard carbon coating that has a thickness of 3 µm or more and demonstrates high peeling resistance and high wear resistance is provided. A sliding member 100 according to the present disclosure includes a base m...
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JP2019090454A |
To greatly improve the compression efficiency of a piston by preventing a mating portion of a piston ring from largely opening or deforming, even in an operation state under extremely low temperature and high pressure, for example.A pist...
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JP6530200B2 |
A side rail (1) in a sprit ring shape is to be mounted on a space expander (2) and to constitute, together with the space expander (2), a multi-piece oil ring (3) used in an internal combustion engine. The side rail (1) includes an outer...
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JP6526937B1 |
Provided are a method for manufacturing a seal ring and a seal ring capable of including a metal tension ring as well as having an abutment having at least axial overlap. The method for manufacturing the seal ring 10 of the present inven...
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JP6527501B2 |
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JP6523595B2 |
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JP6522611B2 |
An improved piston ring for use as an intermediate piston ring in a piston assembly having three or more piston rings is provided. The piston ring includes a piston ring body which extends through an arcuate shape between opposite end fa...
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JP6518493B2 |
To provide a combined oil control ring comprising a pair of upper and lower side rails and an axially corrugated spacer expander having upper and lower portions for automobile engines, which is capable of keeping an excellent oil-control...
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JP6511126B1 |
To provide a sliding member having a hard carbon film having both high abrasion resistance and low friction coefficient and excellent peel resistance. A sliding member 100 of the present invention has a base material 10 and a hard carbon...
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JP6514216B2 |
A piston for an internal combustion engine may have a piston ring groove arranged on an outer circumference of the piston. The piston ring groove may include a lower groove flank and an upper groove flank spaced apart from one another in...
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JP2019070441A |
To provide a dykes-type piston ring having a finished outer diameter and negligible tangential tensive force.A method includes the steps of machining a stock bar to an initial outer diameter slightly greater than the finished outer diame...
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JP2019066024A |
To provide a piston ring that can be used in a severe environment at a higher temperature where boundary lubrication tends to occur, and is coated with a hard coating having excellent wear resistance, scuff resistance and peel resistance...
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JP2019065974A |
To provide an internal combustion engine capable of suppressing damage on an inner cylindrical surface of a cylinder, and also reducing consumption of blow-by gas and oil.An internal combustion engine 10 comprises a cylinder 11, a piston...
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JP2019510178A |
The three-piece oil control ring 2 according to the present invention includes an upper disk-shaped scraping ring 4, a lower disk-shaped stabilizing ring 6, and a circular expander 8 having an axially projecting portion 10 on the inner s...
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JP6499949B2 |
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JP6498986B2 |
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JP6494505B2 |
A piston ring having a hard carbon coating film is provided that can be easily formed in the same batch, does not cause delamination, and is excellent in initial running-in and wear resistance. A hard carbon coating film is formed at lea...
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JP6496578B2 |
Provided is a piston ring excellent in peeling resistance, wear resistance, and thermal conductivity. A piston ring 1 includes: an annular main body 2 having a pair of side faces 2a and 2b, an outer peripheral face 2d, and an inner perip...
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JP6490775B2 |
A piston ring assembly for sealing a cylinder wall to a piston body is provided. The piston ring assembly includes a plurality of rings stacked in an axial direction one in abutment with another. Each ring has an inner face and an outer ...
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JP6491286B2 |
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JP6485149B2 |
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JP2019039338A |
To provide a piston slap reduction device that can reduce slap sound from a reciprocating engine.A piston slap reduction device 1 includes: an oil groove 3 formed by being extended in an axial direction of a cylinder wall 2 in a position...
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JP6480709B2 |
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JP6483601B2 |
Provided is an oil ring (13) for a piston assembly that can minimize the frictional resistance without impairing the oil control function such as the scraping of lubricating oil from the cylinder wall surface by the oil ring. The oil rin...
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JP6480535B2 |
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JP6483125B2 |
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JP6475416B2 |
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JP6472938B1 |
The main part can be used for an internal combustion engine made of aluminum alloy, and it has excellent productivity. The main part is used for an aluminum alloy internal combustion engine, and the base material that constitutes the rin...
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JP6473335B2 |
There is provided a piston ring capable of sufficiently restrain a blowby gas amount and an oil consumption amount by preventing fluttering of a top ring. A piston ring comprising an annular main body 2 having a side surface 2a and a sid...
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JP6472389B2 |
The present invention addresses the problem of providing a piston ring having a hard carbon film exhibiting exceptional wear resistance and running-in property, and a manufacturing method therefor. This problem is solved by a piston ring...
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JP2019023513A |
To provide a method for coating entire surfaces of a plurality of piston rings by executing a chemical vapor deposition (CVD) process once.A method includes a step of providing a coil made of an iron-based material, a step of heating the...
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JP6467222B2 |
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JP6458327B2 |
A piston ring for an internal combustion engine or for a compressor, in particular a piston ring includes an exterior running surface (3), two flanks (5, 6), and an interior circumferential surface (7); the running surface (3) has a prof...
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JP2019011838A |
To provide a piston ring excellent in a slide characteristic, capable of reducing a frictional coefficient to meet the demand of low friction in an internal combustion engine, and capable of reducing lubricant consumption without deterio...
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JP6454103B2 |
A compression ring that makes it possible to suppress adhesion of a piston material to the compression ring is provided. The compression ring includes an annular main body that is constituted of a steel material consisting of 0.45 to 0.5...
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JP6452681B2 |
A piston ring is provided in the form of a base body, which has a running face, an inner circumferential surface, and upper flanks and lower flanks interposed therebetween, in which the base body has a joint and an edge relief, in partic...
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JP6454523B2 |
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JP6453826B2 |
In an amorphous carbon film of a sliding member, provided that a number of nitrogen atoms each singly bonded to three carbon atoms is A, and a number of nitrogen atoms each singly and doubly bonded to two carbon atoms, respectively, is B...
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