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JP6759471B1 |
The second outer peripheral surface, which is a combination of piston rings and is the outer peripheral surface of the second ring, is curved outward in the radial direction of the second ring, and the convex apex is the second ring on t...
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JP2020525721A |
It is an oil scraping piston ring composed of a plurality of parts, and has a spring member with a notch and at least one thin plate member which is in an action-bonded state with the spring member and has a butt region, and is a thin pl...
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JP6742298B2 |
A sliding element, in particular a piston ring has an outer circumferential running surface of the piston ring, has no nitriding layer, preferable no surface hardening the running surface has as an outermost layer, which differs from the...
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JPWO2019124389A1 |
The piston ring for an internal combustion engine of the present disclosure is made of a resin composition and has a joint portion, and the gap of the joint portion in a free state with respect to the outer diameter dimension d1 of the p...
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JP2020106109A |
To provide a piston ring including a clad structure composed of a plurality of materials, superior in heat settling resistance, and capable of realizing excellent heat conductivity and/or weight reduction by selecting the plurality of ma...
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JP2020106031A |
To provide a piston and a piston ring that are capable of reducing the lubricant consumption and the wear.The distribution of combustion gases within an engine is controlled using, e.g., a radial channel 100 and/or an axial channel. For ...
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JP6718228B2 |
To provide a combination of an oil ring groove and an oil ring of a piston which can suppress the boost-up of oil through an abutment part of a side rail of a three-piece oil ring, and is excellent in an oil consumption property.In a com...
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JP6718452B2 |
To provide a piston ring comprising a hard carbon film that is easy to form and exhibits excellent wear resistance. The above-described problem is solved by having a hard carbon film 4 formed on at least an outer peripheral sliding surfa...
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JP6712316B2 |
The present invention relates to an alloy cast iron, and a piston ring containing the same, the alloy cast iron including: a pearlite matrix; and a graphite structure and a steadite-type eutectic structure which are precipitated in the p...
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JP6711505B2 |
To provide a technology capable of securing strength of a joint part while suppressing blow-by or oil raise, in a compression ring disposed in a ring groove formed on a piston mounted on a cylinder of an internal combustion engine.A comp...
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JP2020085106A |
To provide an automobile component which has high slidability and can be formed easily, and to provide a manufacturing method of the automobile component.An automobile component 11 of the present invention includes: a slide member 2 havi...
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JP6702537B2 |
To provide a technique which can suppress the damage of a compression ring caused by alcohol fuel products accumulated at a joint end face, in the compression ring which is arranged in an alcohol fuel internal combustion engine.A compres...
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JP6695663B2 |
Provided is a piston ring for an internal combustion engine that enables size reduction of a chamfered edge without leading to the chipping, and sufficient size reduction of a flow passage of a blow-by gas in a piston ring gap, thus effe...
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JP6685642B2 |
An oil ring (1) includes an oil ring body (10) and a coil expander (20). The oil ring body (10) includes a pair of rail portions (12) each including an end portion of an outer periphery having a land (30) formed protruding radially outwa...
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JP2020059087A |
To provide a super finishing device which can improve a strength of a tool, and can reliably and satisfactorily improve a surface roughness of an inner peripheral side surface of a piston ring groove in a piston.A super finishing device ...
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JP6675157B2 |
To provide an oil ring for diesel engines having excellent independency and followability of a pair of rail portions, as well as an excellent function of sealing the side surfaces of a ring groove, a pair of upper and lower, independent,...
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JP2020041573A |
To provide a piston ring which can inhibit wear of a slide mating member even if the piston ring has an uneven structure on an outer peripheral surface.A piston ring is formed with an uneven structure alternately having groove parts and ...
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JP6669922B1 |
To provide a piston ring coated with a DLC coating having excellent wear resistance and low aggression to a cylinder bore sliding surface. The piston rings 10 and 20 are used under engine lubricating oil and have DLC coatings 12 and 22 o...
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JP2020037942A |
To provide a piston for an internal combustion engine capable of preventing deformation of a ring portion due to thermal expansion.A piston 1 includes a piston head 3 having a ring portion 4 including a fire land 5 and ring grooves 6, 6'...
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JP6663241B2 |
To provide a piston ring structure that even when in-cylinder pressure and exhaust gas temperature increase with high supercharging, can surely hold gas sealability to avoid increase of blow-by gas.For a piston ring structure having a fi...
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JP2020033622A |
To provide a sliding member obtained by coating a hard DLC film having low friction, a larger film thickness and high durability with high productivity.A sliding member includes a DLC film formed as a lamination film 1 consisting of at l...
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JP6659892B2 |
To provide a side rail where the vertical directionality is easily discriminated.A side rail 1 constituting a combination oil ring 3 is configured by comprising: an outer peripheral surface 14; an inner peripheral surface 13; a first axi...
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JP2020505505A |
Piston rings are made from a copper-nickel-silicon-chromium alloy. The material allows the top compression ring of the piston to be moved closer to the piston crown, reducing the crevasse volume and reducing the tendency for premature ig...
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JP2020026805A |
To solve the problem due to deterioration of balance in which vertical segments press a bore.A combined oil ring comprises a pair of upper and lower segments and an expander spacer arranged between the segments, wherein the upper and low...
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JP2020504272A |
Piston rings are made from copper-beryllium alloy. The material allows the top compression ring of the piston to be moved closer to the piston crown, reducing the crevasse volume and reducing the tendency for premature ignition. Ignition...
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JP2020020395A |
To provide a piston ring that can improve heat efficiency of an internal combustion engine and suppress overheat of a piston.A piston ring is fitted to a piston of an internal combustion engine including a combustion chamber. The piston ...
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JP2020020358A |
To provide a seal ring that is excellent in hermetically sealing performance in a use condition where use temperature varies between high temperature and room temperature.A seal ring includes: an annular resin seal ring body (1) having a...
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JP6642509B2 |
A piston includes a first pressure ring (10) fitted in a first ring groove of the piston; and a second pressure ring (12) fitted in a second ring groove of the piston, and positioned between the first pressure ring (10) and an oil ring. ...
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JP6636728B2 |
A metal doped carbon coating wherein the Me- doped C coating is for operation in boundary lubrication conditions, in which the metal is present in the coating in an amount of from 5 to 20% by atomic percent, i.e. the ratio of the number ...
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JP2020003038A |
To provide a combination oil control ring for automobile engine capable of maintaining an excellent oil control function without generating fixture between a spacer expander and a side rail even during long-term engine operation.In a spa...
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JP2020003039A |
To provide a method capable of manufacturing a piston ring at low cost, the piston ring having excellent abrasion resistance and suitable for use under high-temperature and high-load environment.A manufacturing method of a piston ring co...
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JP2019533788A |
The present invention relates to sealing elements and / or guide rings made from compositions comprising: i) 50-98 wt% polytetrafluoroethylene and / or modified PTFE, ii) 1-49 wt% perfluoroalkoxy. Polymers, and iii) 1-49% by weight of ch...
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JP6604557B2 |
A piston ring in which carbon films with film qualities optimized to be adapted to required performance are formed on an outer circumferential sliding surface and top and bottom surfaces thereof with good productivity is provided, and a ...
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JP6603284B2 |
Provided is a side rail 1 having an outer peripheral surface 14 facing radially outward, an inner peripheral surface 13 facing radially inward, a first axial side surface 11 facing one side in an axial direction, and a second axial side ...
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JP2019190513A |
To provide a piston ring capable of restricting the increase in oil consumption during high load operation and under in-cylinder negative pressure environment when used as a second compression ring or a third compression ring, furthermor...
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JP6599251B2 |
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JP2019173826A |
To provide a seal ring excellent in sealing performance.A seal ring comprises an annular resin seal ring body (1) having a joint (5) at one place on a circumference, and an elastic C-shaped ring (11) composed of a flat spring material di...
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JP6587570B2 |
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JP6584243B2 |
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JP6579342B2 |
A piston ring has an annular base body 2, which is preferably open at a joint, with a U-shaped cross section, the open side of which faces inwards in the radial direction. A ring spring 4 is provided which runs in a meandering manner in ...
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JP6579813B2 |
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JP6578491B2 |
Provided is a piston ring having excellent low-friction properties and abrasion resistance manufactured without the need for precision control using an ordinary film formation device that does not have a special function. A piston ring o...
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JP2019157740A |
To provide an engine component of which a heat insulation layer has high heat insulation property and good adhesion property to a base material.The engine component includes the metal base material, and the heat insulation layer provided...
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JP2019157744A |
To provide an engine component of which a heat insulation layer has high heat insulation property and good adhesion property to a base material.The engine component includes the metal base material having a surface where a plurality of p...
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JP6576994B2 |
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JP2019152336A |
To provide a combined oil ring in which carbon sludge or the like is not accumulated 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 10 having a spa...
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JP2019523370A |
The present invention relates to a one-piece oil control ring having two strip ridges and an opening extending from the outside to the inside of the ring, and the cross section of the ring body changes in the circumferential direction. T...
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JP6557342B2 |
To provide a piston ring comprising a hard carbon film that is easy to form and exhibits excellent adhesion and wear resistance, and a manufacturing method therefor. The above-described problem is solved by means of a piston ring compris...
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JP6556159B2 |
An oil scraper piston ring, includes a base body that has a running face region provided with running lands, an inner circumferential surface, upper and lower flanks, and oil drainage boreholes/slots extending between the running lands u...
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JP6556501B2 |
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