An outer circumferential surface of a piston ring has a cut surface forming a notched portion between an outer circumferential end surface and a lower surface, the cut surface including a first surface between the outer circumferential end surface and a bottom portion, and a second surface between the bottom portion and the lower surface. The second surface is inclined away from a central axis of the piston ring as it extends toward a crank chamber side, an angle of inclination of the second surface with respect to the bottom portion being greater than or equal to 50° and less than or equal to 85°. When an axial width of the piston ring is h1 and a distance in an axial direction between a connecting portion between the cut surface and the outer circumferential end surface and a connecting portion between the cut surface and the lower surface is H, H/h1 is greater than or equal to 0.2 and less than or equal to 0.4.
A piston unit adapted to reciprocate in a cylinder includes a piston and a top land member attached to the piston. The piston includes a first portion including a piston end at one end surface side and fitted with the top land member. The first portion has a smaller outer diameter than a second portion such that there is a step therebetween. The second portion is the other portion of the piston than the first portion. The top land member has a groove wall forming surface opposed to a step surface that connects the outer circumferential surface of the first portion and the outer circumferential surface of the second portion. The first ring groove is defined by the groove wall forming surface, the step surface, and the outer circumferential surface of the first portion.
Provided are: an electromagnetic wave absorber including fibrous carbon; and an electromagnetic wave shielding composite including: the electromagnetic wave absorber; and an electromagnetic wave reflection layer formed on one surface side of the electromagnetic wave absorber. The electromagnetic wave absorber has a complex permittivity with a real part of from 6 to 30 and an imaginary part of from 1 to 25 at a frequency of 24 GHz. When the electromagnetic wave absorber is cut, the number of fiber bundles of the fibrous carbon observed on a cut surface of the electromagnetic wave absorber, the fiber bundles each having a maximum diameter of 100 nm or more, is 10 or less per 10 μm×10 μm.
[Problem]To provide an insert member for a rotary electric machine, the insert member being capable of improving the strength of joint with a motor case. [Solution] A plurality of protrusion parts are formed on the outer circumferential surface of a substantially cylindrical insert member. In a cross section obtained by cutting the insert member, when a line segment having a predetermined axial length parallel to the inner circumferential surface of the insert member is overlapped with the cross section, a substantial part region in which the protrusion parts overlap with the line segment on the line segment and a non-substantial part region in which the protrusion parts do not overlap with the line segment on the line segment are defined. When a value indicating the ratio of the substantial part region is defined as a substantial part ratio on the line segment, a chart in which the values of the plurality of substantial part ratios are plotted in order is taken as a substantial part summary chart. In an average substantial part summary chart obtained from a plurality of cross sections, when a position where an average substantial part ratio is 0 is defined as a chart end and a position where the average substantial part ratio exceeds 0.98 for the first time is defined as a chart base, the average maximum height of the protrusion, which is the distance from the chart end to the chart base, is 0.08% or more of the outer diameter of the insert member.
[Problem] To provide an insert member, the thermal conductivity of which can be satisfactorily controlled. [Solution] Provided is a substantially cylindrical insert member to be cast in an aluminum alloy motor case of a rotary electric machine. A plurality of protrusions and recesses are formed on the outer circumferential surface of the insert member. When a line along the contour of the outer circumferential surface including the contour of the plurality of protrusions and recesses is defined as a contour line in the range of a predetermined axial length in a cross-section appearing when the insert member is cut into two parts along the axial direction by a virtual plane including the central axis of the insert member, the outer circumferential surface length ratio, which is a value obtained by dividing the length of the contour line by the predetermined axial length, is 1.15 or more.
This stylus is provided at a tip of a measurement probe, the stylus comprising: a stylus tip that makes contact, on an outer peripheral surface thereof, with an object being measured; and a stylus shaft one end of which is connected to the stylus tip. The stylus tip has a hard coating on the outer periphery thereof, and a 0.10 mm × 0.10 mm area having five or fewer coating protrusions is selectable from the outer peripheral surface of the stylus tip, where the coating protrusions are defined as protrusions of the hard coating that locally protrude from the outer peripheral surface and have a height of 1 μm or more.
A land space, which is a groove-shaped space surrounded by a pair of land parts and a web part is formed on an outer peripheral part of a body ring of an oil ring. The outer peripheral surface of the body ring includes a pair of first groove wall surfaces that are provided on both sides of the bottom surface of the land space in the axial direction, connected to the bottom surface, and formed so as to increase in diameter as the first groove wall surfaces separate from the bottom surface in the axial direction. In a cross section that includes a window hole and that is orthogonal to the circumferential length direction, when an upper-side first groove wall surface, which of the pair of first groove wall surfaces is the one provided on the combustion chamber side of an internal combustion engine, forms an angle θ1 with the radial direction of the body ring, θ1 is equal to or less than 60°.
A drip prevention device for a pressurized pouring furnace according to the present disclosure is a device 10 that prevents dripping of molten metal from a molten metal outlet of the pressurized pouring furnace The drip prevention device 10 includes: a stopper 20 that brings a lower end thereof into contact with the outlet so as to block the outlet, and is provided so as to be able to rotate about a central axis 20C of the stopper with no rotation angle limitation and move vertically above the outlet; a rotation motor 30 that rotates the stopper 20; a drip detection device 60 that detects dripping of molten metal from the outlet in a case where the dripping occurs; and a control device 70 that, in a case where a drip detection signal is received from the drip detection device 60, drives the rotation motor 30 to cause the stopper 20 to perform a predetermined rotation operation.
This electrode (1) for capacitors comprises a collector (11) and an active material layer (12) that is formed on the collector (11). The active material layer (12) contains an active material, a binder and carbon nanotubes. The content of the carbon nanotubes in the active material layer (12) is 0.03 to 0.50% by mass. In addition, the volume-based median diameter of the carbon nanotubes in a dispersion liquid, which is obtained by dispersing the carbon nanotubes in water, is 3.0 µm or more.
An outer peripheral surface of a piston ring has a cut surface provided to form a cutout portion between an outer peripheral end portion and a lower surface, the cut surface includes a curved concave surface, an inclination angle of a tangent of the curved concave surface at a point closest to the combustion chamber side on the curved concave surface, with respect to a first virtual line extending in parallel to the lower surface is equal to or greater than 5° and equal to or less than 50°, and in a case where an axial direction width of the piston ring is set as h1, and an axial direction width of the cut surface is set as H, H/h1 is equal to or greater than 0.2 and equal to or less than 0.4.
A combination of piston rings assembled to a piston of an internal combustion engine includes four compression rings. An outer peripheral surface of a first compression ring includes a barrel surface, an outer peripheral surface of a second compression ring includes an outer peripheral end portion and a taper surface, an outer peripheral surface of a third compression ring includes an outer peripheral end portion and a taper surface, and an outer peripheral surface of a fourth compression ring includes an outer peripheral end portion and a taper surface.
[Problem] To provide a catalyst-loaded carbon which has both high initial activity and excellent durability. [Solution] This catalyst-loaded carbon is obtained by loading a carbon carrier that has a crystallite size of 3.5 nm to 9 nm, a BET specific surface area of 300 m2/g to 450 m2/g and a pore diameter of 5.0 nm to 20.0 nm with catalyst particles that are formed of platinum or a platinum alloy, the catalyst particles having a crystallite size of 2.5 nm to 5.0 nm and a catalyst surface area of 40 m2/g to 80 m2/g.
The objective of the present invention is to supply sufficient electricity to a vehicle that has run out of charge, while using a compact electricity generator. An electricity supply control device (1) installed in an engine-driven moving body capable of supplying electricity to a drive battery of an electric automobile comprises: an electricity generator (14) which is driven by an engine (11) to generate electricity; a clutch (15) capable of engaging and disengaging a motive power transmission path between the engine (11) and the electricity generator (14); an electricity supply unit for supplying electric power generated by the electricity generator (14) to a drive battery (3); an electricity supply start determining unit for determining that the supply of electricity from the electricity supply unit to the drive battery (3) has started; an engine control unit (18) for disengaging the clutch (15) to increase the rotational speed of the engine (11) when it has been determined by the electricity supply start determining unit that the supply of electricity has started; and a clutch control unit (19) for gradually engaging the clutch (15) while allowing the same to slip, if the rotational speed of the engine 11 has risen above a clutch engagement permitted value by means of the engine control unit (18).
B60W 20/13 - Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limitsControlling the power contribution of each of the prime movers to meet required power demand in order to prevent overcharging or battery depletion
B60K 5/00 - Arrangement or mounting of internal-combustion or jet-propulsion units
The present invention solves a novel problem of corrosive wear that occurs in the use of a valve seat in an internal combustion engine using a hydrogen gas fuel. The problem is solved by an iron-based sintered alloy valve seat used in an internal combustion engine using a hydrogen gas fuel, in which the Cr content is 6% by mass to 23% by mass, the Mo content is 5% by mass to 20% by mass, the Cu content is 10% by mass to 23% by mass, the Co content is 3% by mass or more, and a total content of Cr, Mo, and Co is 14% by mass to 47% by mass.
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor
B22F 3/16 - Both compacting and sintering in successive or repeated steps
The purpose of the present invention is to solve the new problem of corrosive wear occurring in the case where a valve sheet is used in an internal combustion engine utilizing a hydrogen gas fuel. The problem is solved by an iron-based sintered alloy valve sheet intended to be used in an internal combustion engine utilizing a hydrogen gas fuel, the sintered alloy valve sheet having a Cr content of 6% by mass to 23% by mass inclusive, a Mo content of 5% by mass to 20% by mass inclusive, a Cu content of 10% by mass to 23% by mass inclusive and a Co content of 3% by mass or more, in which the total content of Cr, Mo and Co is 14% by mass to 47% by mass inclusive.
An oil control ring comprises: an oil ring having a pair of land parts arranged in a sliding direction and connected to each other by a web part; and a coil expander that biases the oil ring toward the outer circumferential side in the radial direction. The web part of the oil ring is provided with a plurality of window holes. In the axial cross-sectional view of the largest opening portion of the window hole in the axial direction of the oil ring, a width H1 in the sliding direction of the oil ring and a length L1 of a combustion chamber-side non-window hole part, which excludes the window hole, in the outer circumferential surface of the web part, satisfy the condition of 0.15>L1/H1≥0.
This piston ring is used in an internal combustion engine that uses a hydrogen gas fuel. The piston ring satisfies 0.75 ≤ FPS, when: the flexural index of the piston ring found when same is subjected to a flexural test under a prescribed condition is noted as FP1; the post-corrosion flexural index of the piston ring found when same is subjected to the flexural test after a corrosion test is performed in which the piston ring is immersed in a 1% nitric acid aqueous solution for 30 minutes is noted as FP2; and the flexural strength sustained ratio FPS of the piston ring is defined as FPS = FP2/FP1.
An outer peripheral surface of a compression ring includes a barrel curved surface, in a case where a width of the outer peripheral surface in an axial direction of the compression ring is set as L1, a condition of 0.2 mm≤½×L1 is satisfied, and in a case where a distance in a radial direction of the compression ring between an outer peripheral peak and each of two points on the barrel curved surface separate from the outer peripheral peak by 0.1 mm in the axial direction of the compression ring is set as d1, and a distance in the radial direction of the compression ring between the outer peripheral peak and each of two points on the barrel curved surface separate from the outer peripheral peak by ¼×L1 in the axial direction of the compression ring is set as d2, a condition of d1
This compression ring is for use in a spark-ignition engine using a hydrogen gas fuel, and is to be assembled into a piston ring groove of a piston mounted to a cylinder. In an abrasion resistance test that is conducted in order to evaluate an outer circumferential sliding surface of the compression ring and under prescribed conditions using a reciprocating sliding friction tester, in a case where TW1 (μm) represents the amount of friction on the outer circumferential sliding surface when the test is conducted by dripping bearing oil and distilled water at the rate of 1 mL/hr and 0.5 mL/hr, respectively, TO1 (μm) represents the amount of friction on the outer circumferential sliding surface when the test is conducted by dripping only the bearing oil at the rate of 1 mL/hr, and T(μm)=TW1-TO1 is satisfied, the compression ring satisfies T≤10.
A mold used for centrifugal casting includes a mold body formed in a cylindrical shape and a lid member (40) that is detachably assembled to an end part of the mold body in an axial direction. The lid member includes a lid body (41) that is attached to an opening part formed at the end part of the mold body, a protrusion part (450) that is fitted to the mold body, and a spring that applies elastic force to the lid body in a direction in which the lid body closely contacts the mold body.
A thermoelectric conversion module includes a base material having heat insulation properties and carbon nanotube yarn that is helically wound around the base material, P-type parts and N-type parts are alternately arranged and are series-connected in an extension direction of the carbon nanotube yarn, one side part of a helix formed by the carbon nanotube yarn is formed as a heat reception part, and the other side part across the base material from the one side part is formed as a heat dissipation part, lengths of the P-type parts and lengths of the N-type parts are shorter than a length of a one-turn portion of the helix, and the P-type parts and the N-type parts are arranged such that respective one end parts are included in the heat reception part and respective other end parts are included in the heat dissipation part.
H10N 10/855 - Thermoelectric active materials comprising inorganic compositions comprising compounds containing boron, carbon, oxygen or nitrogen
H10N 10/17 - Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the structure or configuration of the cell or thermocouple forming the device
The present invention addresses the problem of providing a CrN coating film which has excellent peeling resistance such that peeling thereof starting at a crack is unlikely to occur even in a more severe lubrication environment. The problem is solved by a CrN coating film which has a preferred orientation of 200 as determined by XRD, and in which the X-ray diffraction intensity ratio of the (200) plane with respect to the (111) plane, (200)/(111), is 5.5 or higher, and the ratio of crystal grains of 1 μm or smaller is 85% or higher in a crystal grain size distribution measured by an EBSD analysis.
A retaining unit that retains a stack body in which piston rings are stacked in an axial direction, a cutting-out unit that delivers a piston ring at the tip end of the stack body from the stack body, and a detecting unit that detects a boundary between the piston rings that are adjacent to each other in the stack body are included, and the cutting-out unit includes a moving unit that moves a pushing-out unit and a restricting unit, and after inserting the pushing-out unit and the restricting unit into a dividing portion that is a boundary between the piston ring at the tip end and a piston ring that is adjacent to the piston ring at the tip end in the stack body, in a state in which movement of the piston ring that is adjacent to the piston ring at the tip end in a delivering direction in which the piston ring at the tip end is delivered is restricted by the restricting unit, the moving unit moves the pushing-out unit in the delivering direction, so that the piston ring at the tip end is separated from the stack body, and the piston ring at the tip end is delivered along the retaining unit.
B23P 19/08 - Machines for placing washers, circlips, or the like on bolts or other members
B25B 27/12 - Hand tools or bench devices, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same mounting or demounting piston rings
3 bonding is observed in the DLC coating in addition to a G band derived from the graphite structure and a D band derived from the defects of the graphite structure, and these bands satisfy specific relationships.
An object of the present invention is to provide a sliding member coated with a DLC coating in which microfractures on the sliding surface thereof due to the progression of cracks are less likely to occur, and in which an increase in abrasive wear can be reduced. The present invention achieves the above-mentioned object by a sliding member having, on the outer peripheral sliding surface thereof, a DLC coating in which the amount of plastic deformation work as measured by a nanoindentation test is within a specific range.
A casting system (10) includes a plurality of mold tables (41 and 42), molten metal pouring trucks (21 and 22), and a molten metal supply furnace (30). The mold tables are each provided with centrifugal casting molds (81 to 84 and 91 to 94). Each molten metal pouring truck can move to the position of each mold table and pour molten metal into the molds installed on the mold table. The molten metal supply furnace supplies molten metal to the molten metal pouring trucks.
Provided are: an electromagnetic wave absorber which contains fibrous carbon, has a complex permittivity having a real part value of 6 to 30 and an imaginary part value of 1 to 25 at a frequency of 24 GHz, and is made from fiber bundles of the fibrous carbon observed in a cross-section of the electromagnetic wave absorber when the electromagnetic wave absorber is cut, wherein the number of fiber bundles having a maximum diameter of 100 nm or greater is 10 or less per 10 µm x 10 µm; and an electromagnetic wave shielding composite which has the electromagnetic wave absorber and an electromagnetic wave reflection layer disposed on one surface side of the electromagnetic wave absorber.
A device according to the present disclosure is a workpiece retaining device 10 that retains a retained portion 110 of an axial-directional end portion of a workpiece 100 that is cylindrical. The workpiece retaining device 10 includes a core member 32 that is round and that comes into contact an inner perimeter face of the retained portion 110 of the workpiece 100, a pressing member 33 that presses an outer perimeter face of the retained portion 110 of the workpiece 100 to an inner side in a radial direction, and an aligning member 44 that, upon a pressing force from the pressing member 33 acting thereupon, allows the core member 32 to move in the radial direction, in accordance with a magnitude and a direction of the pressing force.
A cooling device (21) includes radiation thermometers (51 to 55), a plurality of nozzle parts, a plurality of electromagnetic valves (V1 to V5), and a control device (60). The radiation thermometers detect pre-cooling temperatures that are temperatures at a plurality of places on the mold before cooling water is sprayed from the plurality of nozzle parts to the mold. The control device individually sets a cooling time to each of the plurality of places on the mold based on a deviation between the pre-cooling temperature at the place on the mold and a target temperature and controls the electromagnetic valves based on the cooling times individually set to the plurality of respective places on the mold.
A combination of piston rings assembled to a piston includes a first compression ring, a second compression ring, a third compression ring and an oil ring. When an axial width of the first compression ring is h1(1), an axial width of the second compression ring is h1(2), an axial width of the third compression ring is h1(3) and an axial width of the oil ring is h1(4), h1(1)≥h1(2) and h1(1)≥h1(3), and when h1(TOTAL)=h1(1)+h1(2)+h1(3)+h1(4), h1(TOTAL)≥3.1 mm.
This piston unit, which reciprocates in a cylinder, comprises a piston and a top land member mounted to the piston. The piston has a first portion that includes an end part of a side of one end face of the piston and on which the top land member is mounted. The first portion has a smaller outer diameter than a second portion of the piston excluding the first portion such that a step is formed between the first portion and the second portion. The top land member has a groove wall-forming surface opposing a step surface connecting the outer circumferential surface of the first portion and the outer circumferential surface of the second portion, and a first ring groove is demarcated by the groove wall-forming surface, the step surface, and the outer circumferential surface of the first portion.
The present invention makes it possible to improve recyclability, achieve a reduction in weight, and improve environmental friendliness. To this end, a cylinder liner (30) according to the present disclosure is provided only to a part of a region of an inner surface (21i) of a cylinder (21) in a reciprocating engine, said region being where a piston ring (50) fitted to a piston (40) that reciprocates in the cylinder (21) slides. The total length L of the liner along the axial direction of the cylinder (21) is less than the inner diameter B of the cylinder. One lower end part (30d), which is toward the bottom dead center side of the piston ring (50) in the axial direction, has protrusions and recesses formed therein.
A combination of piston rings assembled to a piston includes a first compression ring, a second compression ring, a third compression ring and an oil ring. When an axial width of the first compression ring is h1(1), an axial width of the second compression ring is h1(2), an axial width of the third compression ring is h1(3) and an axial width of the oil ring is h1(4), h1(1)≥h1(2) and h1(1)≥h1(3), and when h1(TOTAL)=h1(1)+h1(2)+h1(3)+h1(4), h1(TOTAL)≥3.9 mm.
The outer peripheral surface of this piston ring has a cut surface that is provided so as to form a cutout between the outer peripheral end and the lower surface. The cut surface includes a curved concave surface. The angle of inclination of the tangent line of the curved concave surface at the point closest to the combustion chamber on the curved concave surface with respect to a first imaginary line extending parallel to the lower surface falls within the range of 5-50°. H/h1 falls within the range of 0.2-0.4, where h1 is defined as the axial width of the piston ring and H is defined as the axial width of the cut surface.
The outer peripheral surface of this piston ring has a cut surface that forms a cutout between the outer peripheral end and the lower surface. The cut surface includes a first surface provided between the outer peripheral end surface and the bottom, and a second surface provided between the bottom and the lower surface. The second surface is inclined away from the center axis of the piston ring with approach towards a crank chamber, and the inclination angle of the second surface with respect to the lower surface falls within the range of 50-85°. H/h1 falls within the range of 0.2-0.4, where h1 is defined as the axial width of the piston ring and H is defined as the distance in the axial direction between the connection portion between the cut surface and the outer peripheral end surface and the connection portion between the cut surface and the lower surface.
Provided is a cylinder liner which can reduce the friction of the sliding surface from conventional levels and improve fuel efficiency without increasing oil consumption from conventional levels.
When the inner circumferential surface of a cylinder liner or cylinder bore used in an internal combustion engine has a first sliding region, a second sliding region, and a third sliding region, and when respective surface roughness Rvk is from 0.05 μm to 0.3 μm, from 0.4 μm to 1.5 μm, and from 0.15 μm to 0.7 μm, a friction can be reduced while maintaining oil consumption.
The present invention addresses the problem of providing a sintered alloy valve guide capable of inhibiting valve adhesion even in a high-temperature environment. The problem can be solved by a sintered alloy valve guide impregnated with a lubricating oil including pores that are sealed on the valve guide outer circumferential surface. More particularly, the problem is solved by the sealing step of performing a sealing treatment of pores on the outer circumferential surface of a sintered body impregnated with a lubricating oil.
B22F 5/10 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
B22F 7/00 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting
B22F 3/16 - Both compacting and sintering in successive or repeated steps
B22F 3/24 - After-treatment of workpieces or articles
Provided is a cylinder having grooving in a cylinder inner circumferential surface. The grooving includes a honed groove and a recessed groove having a larger groove width and a larger groove depth than the honed groove. The honed groove and the recessed groove extend in a cylinder circumferential direction and have an inclination angle in relation to a direction perpendicular to the cylinder axial direction. In a sliding region of an oil ring when a crank angle is from 50º to 140º, the cylinder inner circumferential surface is such that, in the cylinder axial direction, a length of 4 mm in which the recessed groove is present in four or more places can be selected.
The present invention addresses the problem of providing a sliding member covered with a DLC coating with which microfractures in a sliding surface due to development of cracks are less likely to occur, and an increase in abrasive wear can be suppressed. The problem is solved by a sliding member having on an outer peripheral sliding surface a DLC coating, wherein the amount of work of plastic deformation which is measured by a nanoindentation test is within a specific range.
A piston ring combination for mounting to a piston in an internal combustion engine is provided which comprises four compression rings. An outer peripheral surface of a first compression ring includes a barrel face, an outer peripheral surface of a second compression ring includes an outer peripheral end portion and a tapered face, an outer peripheral surface of a third compression ring includes an outer peripheral end portion and a tapered face, and an outer peripheral surface of a fourth compression ring includes an outer peripheral end portion and a tapered face.
The present invention addresses the problem of providing a sliding member that is covered by a DLC coating, is less likely to have micro-fractures on the sliding surface that have been caused by the progression of cracks, and is able to suppress increases in abrasive wear. This problem is solved by means of a sliding member having a DLC coating on the outer peripheral surface thereof. In the DLC coating, an S-band derived from an sp3 bond is measured in addition to a G-band derived from a graphite structure and a D-band derived from defects in the graphite structure, and these bands satisfy a specific relationship.
An oil ring according to the present invention includes: a pair of segments that are formed following a perimeter direction of the oil ring and that are provided arrayed in the axial direction of the oil ring, independent from each other, with an annular wire rod as a base material of each; and a space expander that is disposed between the pair of segments. Of the pair of segments, the base material of an upper-side segment that is situated on a combustion chamber side in an internal combustion engine has higher wear resistance than the base material of a lower-side segment of the pair of segments that is situated on a crank chamber side in the internal combustion engine.
This oil ring comprises a pair of segments that are annularly formed so as to follow the circumferential direction of the oil ring and that are arranged independently of each other in the axial direction of the oil ring, and a spacer expander disposed between the pair of segments. A surface treatment film is formed, on at least part of at least one of at least one axial end surface of at least one of the pair of segments, such that the surface colors of the pair of segments are different from each other.
The combination of piston rings assembled to a piston comprises a first compression ring, a second compression ring, a third compression ring, and an oil ring. When the first compression ring has an axial width of h1(1), the second compression ring has an axial width of h1(2), the third compression ring has an axial width of h1(3), and the oil ring has an axial width of h1(4), h1(1)≥h1(2) and h1(1)≥h1(3) are established. When h1(TOTAL)=h1(1)+h1(2)+h1(3)+h1(4), h1(TOTAL)≥3.1 mm is established.
This combination of piston rings assembled on pistons includes a 1st compression ring, a 2nd compression ring, a 3rd compression ring, and an oil ring. Letting h1(1) be the axial width of the first compression ring, h1(2) be the axial width of the second compression ring, h1(3) be the axial width of the third compression ring, and h1(4) be the axial width of the oil ring, h1(1) ≥ h1(2) and h1(1) ≥ h1(3), and when h1(TOTAL) = h1(1)+h1(2)+h1(3)+h1(4), h1(TOTAL) ≥ 3.9 mm.
The present invention addresses the problem of providing a cylinder liner or a cylinder bore, which can reduce not only friction on a sliding surface but also oil consumption. In a piston sliding direction of the cylinder bore, grooves of a second sliding region positioned on the side of crankcase have a higher groove area ratio at a depth of 0.3 μm than grooves of a first sliding region positioned on the side of combustion chamber, and the groove area ratio is in a specific range, whereby friction and oil consumption can be reduced.
The present invention addresses the problem of providing a sintered alloy valve guide with which valve adhesion can be prevented even in a high-temperature environment. This problem is resolved by means of a sintered alloy valve guide in which holes in an outer peripheral surface of the valve guide that are impregnated with lubricating oil are sealed. More specifically, the problem is resolved by means of a seal processing step of performing seal processing of holes in an outer peripheral surface of a sintered body that are impregnated with lubricating oil.
This space expander comprises: an expander body that is annularly formed along the circumferential direction of an oil ring and that urges a pair of segments outward in the radial direction of the oil ring, the expander body including a pair of abutment ends that form an abutment by facing each other and, and the expander body being formed in a wavy shape that is continuous in the circumferential direction when viewed in the radial direction of the oil ring; an expander groove formed in the expander body so as to span between the abutments and extend along the circumferential direction of the oil ring; and a linear member including a fitting part formed in an arc along the circumferential direction of the oil ring, the fitting part being fitted into the expander groove so as to span between the abutments.
This oil control ring comprises: an oil ring in which a pair of land sections disposed along the sliding direction are coupled by a web section; and a coil expander that forces the oil ring radially toward the outer periphery. In the web section of the oil ring, a plurality of window apertures are formed. In a cross-section along the axial direction of the window-aperture maximum opening along the axis of the oil ring, the width H1 of the oil ring along the sliding direction and the length L1 of a non-window-aperture section excluding the window apertures at the combustion chamber side of the web-section outer peripheral surface satisfy the relation 0.15 > L1 / H1 ≥ 0.
According to the present invention, a piston and piston ring combination structure comprises a ring groove that is provided in an outer circumferential surface of a piston and is for installing a piston ring, one or more piston rings that are installed in the ring groove, and a partition ring that is installed in the ring groove so as to be aligned with the one or more piston rings in the axial direction of the piston. The partition ring is fitted onto a bottom groove wall surface that is a bottom surface of the ring groove so as to be at a prescribed interval from an inner wall of a cylinder.
Provided is a spiny liner that may further improve bonding strength when being integrated with metal on the outer peripheral surface side. The spiny liner includes a plurality of projections including constricted projections on the surface. Denoting the number of constricted projections per 100 mm2 out of the projection by Pc, the average height of projections by h (mm), and the average of maximum thicknesses and the average of minimum thicknesses of any 20 projections out of the constricted projections by dw (mm) and dn (mm), respectively, the total value of (I) and (II) below is 1.55 or more.
Provided is a spiny liner that may further improve bonding strength when being integrated with metal on the outer peripheral surface side. The spiny liner includes a plurality of projections including constricted projections on the surface. Denoting the number of constricted projections per 100 mm2 out of the projection by Pc, the average height of projections by h (mm), and the average of maximum thicknesses and the average of minimum thicknesses of any 20 projections out of the constricted projections by dw (mm) and dn (mm), respectively, the total value of (I) and (II) below is 1.55 or more.
(I)=Pc×[(0.35 hπ/12)×(2dw2−dw×dn−dn2)]
Provided is a spiny liner that may further improve bonding strength when being integrated with metal on the outer peripheral surface side. The spiny liner includes a plurality of projections including constricted projections on the surface. Denoting the number of constricted projections per 100 mm2 out of the projection by Pc, the average height of projections by h (mm), and the average of maximum thicknesses and the average of minimum thicknesses of any 20 projections out of the constricted projections by dw (mm) and dn (mm), respectively, the total value of (I) and (II) below is 1.55 or more.
(I)=Pc×[(0.35 hπ/12)×(2dw2−dw×dn−dn2)]
(I)=Pc×{(dn2/4)×r×0.35h}
This dripping prevention device for pressurized pouring furnace is a device 10 for preventing dripping of hot water from the hot water outlet of a pressurized pouring furnace. Said dripping prevention device 10 is provided with: a stopper 20, the bottom end of which contacts the outlet to close said outlet, and which is provided so as to be capable of rising and lowering above the outlet and so as to be capable rotating about the center axis 20C of said stopper without restriction on the rotation angle; a rotation motor 30 which rotates said stopper 20; a dripping detection device 60 which detects dripping when hot water drips from the outlet; and a control device 70 which, in the case that a dripping detection signal has been received from the dripping detection device 60, drives the rotation motor 30 and causes the stopper 20 to perform a prescribed rotation action.
155), and a control device (60). The radiation temperature meters respectively detect, at a plurality of parts of a mold, pre-cooling temperatures which are the temperatures before the plurality of nozzle parts spray the mold with cooling water. On the basis of the deviations between the respective pre-cooling temperatures of the plurality of parts of the mold and corresponding target temperatures, the control device individually sets cooling times for the plurality of parts of the mold. The control device controls the electromagnetic valves on the basis of the respective cooling times which are individually set for the plurality of parts of the mold.
The present invention addresses the problem of providing a sliding coating film which is capable of suppressing separation phenomenon that is different from detrition due to sliding. The problem is solved by a sliding coating film which is a multilayer film that is obtained by sequentially superposing an adhesive layer, a first carbon layer and a second carbon layer in this order on a metal-based substrate that constitutes a sliding member, wherein: a peak is present between the loss energy of 280 eV and the loss energy of 290 eV in the electron energy loss near edge structures (C-K loss edge ELNES) of the first carbon layer and the second carbon layer as determined by TEM-EELS; and the peak height of the first carbon layer is higher than the peak height of the second carbon layer.
The present invention comprises a holding part that holds a stacked body in which piston rings have been stacked in the axial direction, a cutting-off part that delivers the tip-end piston ring from the stacked body, and a detection unit that detects the boundaries between adjacent piston rings in the stacked body, wherein: the cutting-off part has a movement part that moves a push-out part and a restriction part; and the movement part inserts the push-out part and the restriction part into a separation site that is the boundary between the piston ring at the tip end of the stacked body and the piston ring adjacent to the tip-end piston ring and then, in a state in which the restriction part restricts the piston ring adjacent to the tip end piston ring from moving in the delivery direction in which the tip-end piston ring is to be delivered, moves the push-out part in the delivery direction, whereby the tip-end piston ring is separated from the stacked body and is delivered along the holding part.
B23P 19/00 - Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformationTools or devices therefor so far as not provided for in other classes
B23P 19/02 - Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformationTools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
B23P 21/00 - Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control
A casting system (10) is provided with a plurality of mold tables (41, 42), pouring carriages (21, 22), and a pouring furnace (30). The mold tables are provided with centrifugal casting molds (81-84, 91-94). The pouring carriages can move to each position of the mold tables and pour molten metal into the molds provided on the mold tables. The pouring furnace pours molten metal into the pouring carriages.
An outer peripheral surface of this compression ring includes a barrel curved surface, wherein: if L1 is a width of the outer peripheral surface in an axial direction of the compression ring, the condition 0.2 mm<1/2×L1 is satisfied; and if d1 is a distance in the radial direction of the compression ring between an outer peripheral vertex and each of two points on the barrel curved surface separated by 0.1 mm from the outer peripheral vertex in the axial direction of the compression ring, and d2 is a distance in the radial direction of the compression ring between the outer peripheral vertex and each of two points on the barrel curved surface separated by 1/4×L1 from the outer peripheral vertex in the axial direction of the compression ring, the condition d1
Oil grooves (40) formed in at least one of surfaces of a ring-shaped member (30) each have a longitudinal direction that forms an angle falling within a range of from 40 degrees to 75 degrees with respect to a radial direction of the ring-shaped member, and are arranged at equal intervals in a circumferential direction of the ring-shaped member (30). The oil grooves (40) include communicating oil grooves (40A) and non-communicating oil grooves (40B) formed to extend to the vicinity of an outer peripheral end (34), and are arranged with periodic regularity in the circumferential direction of the ring-shaped member (30). In addition, a communicating oil groove area ratio expressed by Expression: “S1/(S1+S2)” falls within a range of from 0.15 to 0.85, where S1 represents a sum of plane areas of the communicating oil grooves (40A), S2 represents a sum of the non-communicating oil grooves (40B).
The present invention provides a mold that is used for centrifugal casting and is provided with a mold body that is formed into a cylindrical shape and a lid member (40) that is detachably attached to an end of the mold body in the axial direction. The lid member is provided with a lid body (41) that is attached to an opening formed in the end of the mold body, a protruding part (450) that is fitted to the mold body, and a spring that provides the lid body with an elastic force in a direction to make the same closely contact with the mold body.
The present invention addresses the problem of providing a CrN coating film which has excellent peeling resistance and is not susceptible to separation of the coating film, said separation beginning at a crack, even in a severer lubricating environment. The problem is solved by a CrN coating film which has a 200 preferred orientation as determined by XRD, wherein: the X-ray diffraction intensity ratio of the (200) plane to the (111) plane, namely (200)/(111) is 5.5 or more; and the proportion of crystal grains having a crystal grain size of 1 μm or less is 85% or more in the crystal grain size distribution as determined by EBSD analysis.
The device according to the present disclosure is a workpiece holding device 10 for holding a held portion 110 located at an axial-direction end section of a tubular workpiece 100. The workpiece holding device 10 comprises: a circular core member 32 that abuts an inner peripheral surface of the held portion 110 of the workpiece 100; a pressing member 33 that presses an outer peripheral surface of the held portion 110 of the workpiece 100 radially inward; and an aligning member 44 that allows the core member 32 to move in the radial direction, when a pressing force from the pressing member 33 is applied, in response to the size and direction of the pressing force.
In a surface of a wire, a first side surface forming an outer circumferential surface in a piston ring includes a tapered surface and a protruding surface, the protruding surface is divided into a first part and a second part by a first virtual surface extending from the tapered surface, and the first part includes a top and is formed in a protruding shape.
F16J 9/20 - Rings with special cross-sectionOil-scraping rings
B23P 15/06 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass piston rings from one piece
Provided is a thrust washer that can reduce torque and wear, decrease the torque amplitude width, and suppress oil burns. This thrust washer is such that the longitudinal direction of oil grooves 40 provided in at least one surface of a ring-shaped member 30 forms an angle of 40-75 degrees in relation to the radial direction of the ring-shaped member. The oil grooves 40 are disposed at equal intervals in the circumferential direction of the ring-shaped member 30, include a communicating oil groove 40A and a non-communicating oil groove 40B, which is provided so as to extend to an edge of an outer circumferential end 34, and are arranged so as to have cyclic regularity in relation to the circumferential direction of the ring-shaped member 30. In addition, a communicating oil groove area ratio indicated by equation (1) below is 0.15-0.85. • Equation (1) Communicating oil groove surface area ratio = S1/(S1 + S2) [in equation (1), S1 denotes the sum total of the plane area of the respective communicating oil grooves 40A, S2 denotes the sum total of the plane area of the non-communicating oil grooves 40B, n denotes the total number of communicating oil grooves 40A, and m denotes the total number of non-communicating oil grooves 40B.]
Provided are a heat-shielding ring for a cylinder liner that is less likely to be damaged due to a groove for forming an insulation air layer, and an internal combustion engine that uses said heat-shielding ring. The present invention is a heat-shielding ring 10 for a cylinder liner and an internal combustion engine 200 that uses the heat-shielding ring 10. In the heat-shielding ring 10 for a cylinder liner, the cross-sectional shape of a groove 34 provided in an outer peripheral surface 30 of a ring-form member 20 constituting the heat-shielding ring 10 is any one or more shapes selected from the group comprising (1) a first cross-sectional shape in the form of a letter V, (2) a second cross-sectional shape in which the vicinities of the corners of the first cross-sectional shape are rounded into a curve, (3) a third cross-sectional shape formed from only an arcuate curve, and (4) a fourth cross-sectional shape in the form of a letter U.
A thrust washer is provided with a ring-shaped portion that surrounds an insertion hole, the thrust washer is provided with a sliding surface and an oil groove configured to allow lubricating oil to flow in, the oil groove is provided with an opening portion configured to allow the lubricating oil to flow in from the insertion hole side in an inner peripheral end side, an outer periphery end side of the ring-shaped portion of at least one of the oil groove is provided with an oil stop wall which is configured to suppress flow of the lubricating oil toward an outer periphery side of the ring-shaped portion, and a sliding area ratio of each of the sliding surfaces to a projection plane in plan view of the ring-shaped portion is provided within a range of from 60% to 85%
A cylinder liner of the present invention is a cylinder liner mounted on a cylinder block and formed of flaky graphite cast iron, at least a nitrided layer is provided on an inner periphery of the cylinder liner, and a cross hatching section is formed on the inner periphery, a roughness curve of the inner periphery has a plateau honing shape, a ten-point average roughness Rz of the inner periphery pursuant to JIS B0601:1982 is 4.0 μm or less, and an average value of an area ratio of pits generated in the inner periphery is 8% or less.
B24B 33/02 - Honing machines or devicesAccessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
The present invention addresses the problem of providing a spiny liner that can further improve joining strength when integrated with metal on an outer circumferential surface side. The spiny liner having a plurality of protrusions on the surface, including narrowed mid-section protrusions, and capable of solving the problem, wherein the total value of the following (I) and (II) for the protrusions is 1.55 or more, where Pc is the number of the narrowed mid-section protrusions per 100 mm2, h (mm) is the average height of the protrusions, and dw (mm) is the average maximum thickness and dn (mm) is the average minimum thickness of any 20 protrusions from among the narrowed mid-section protrusions. (I) = Pc × [(0.35hπ/12) × (2dw2- dw × dn - dn2)]; (II) = Pc × {(dn2/4) × π × 0.35h}
The present invention addresses the problem of providing a cylinder liner that can improve fuel efficiency by reducing the friction of a sliding surface compared to conventional levels without increasing oil consumption compared to conventional levels. In this cylinder liner or cylinder bore used for internal combustion engines, the inner circumferential surface of the cylinder liner or the cylinder bore has a first sliding region, a second sliding region, and a third sliding region which respectively have surface roughnesses Rvk of 0.05-3 μm, 0.4-1.5 μm, and 0.15-0.7 μm, and it is thus possible to reduce friction while keeping oil consumption the same.
Provided is a wire material of which a first side surface for forming an outer peripheral surface of a piston ring includes a tapered surface and a protruding surface. The protruding surface is divided into a first portion and a second portion by a first virtual surface which is an extension of the tapered surface. The first portion includes an apex part and is formed to have a projecting shape.
An object of the present invention is to provide a cylinder liner for insert casting that can improve the joining strength between a cylinder liner and a cylinder block by reducing voids generated between the cylinder liner and the cylinder block.
av between top portions of protrusions (mm) (1).
2 component ratio of 0.5 to 0.85 as determined from a TEM-EELS spectrum obtained by a combination of a transmission electron microscope (TEM) and electron energy loss spectroscopy (EELS), as well as a coating hardness of 12 GPa to 26 GPa and a Young's modulus of 250 GPa or less as measured by a nanoindentation method.
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
C23C 14/06 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
F02F 5/00 - Piston rings, e.g. associated with piston crown
F16J 9/22 - Rings for preventing wear of grooves or like seatings
F16J 9/28 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials of non-metals
In this piston ring combination, a second outer peripheral surface, which is the outer peripheral surface of a second ring, has a second protruding surface curved into a convex shape, and a pair of third outer peripheral surfaces, which are the outer peripheral surfaces of a pair of segments, each have a third outer peripheral area in which a third protruding surface is formed, the third protruding surfaces being curved into convex shapes. In at least one of the pair of third outer peripheral surfaces, the peripheral edge on a crank-chamber side is positioned farther outward in the diametrical direction than the peripheral edge on a combustion-chamber side, and a peak of the third protruding surface is positioned nearer to the crank chamber than the center of the third outer peripheral surface.
The present invention addresses the problem of providing a cylinder liner or a cylinder bore that makes it possible to reduce friction on a sliding surface and reduce oil consumption. In a piston sliding direction of a cylinder bore, the groove part of a second sliding area positioned on a crank side has a higher groove area ratio at a depth of 0.3 μm than a groove part of a first sliding area positioned on a combustion room side and falls within a specific range to thereby make it possible to reduce friction and reduce oil consumption.
An aspect of the present invention provides a binder which makes it possible to obtain an electrode excellent in heat resistance. The binder contains: a re-emulsifiable resin powder coated with inorganic particles; and a metal-crosslinking thickening agent forming a hydrophobic gel by being crosslinked, in an aqueous system, via metal ions derived from an electrode active material.
Provided is a binder with which an electrode that has exceptional heat resistance is obtained. The binder contains: a re-emulsifiable resin powder covered with inorganic particles; and a metal cross-linking thickener that crosslinks in a water system with metal ions derived from an electrode active material, and forms a hydrophobic gel.
The present invention addresses the problem of providing a compression ring which has favorable thermal conductivity and is capable of maintaining tension in hot environments. The present invention solves this problem by providing a compression ring which is to be used by mounting to an internal combustion engine piston, and comprises a copper alloy having a thermal conductivity of 30W/m·K or higher and a tension reduction rate of 50% or less after being kept at 250°C for 3 hours.
This hybrid capacitor is configured so that: a positive electrode includes graphite as a positive electrode active material; a positive-electrode-side current collector is made of an aluminum material; and the aluminum material is coated by a carbon plating film in which the content ratio sp2/(sp2+ sp3) of sp2 structures is 80% or higher.
2 on the outer peripheral surface, and (ii) when two 15.2 mm×0.03 mm lines are set in parallel with a gap of 3.8 mm therebetween at an arbitrary position on the outer peripheral surface of the cylinder liner, the total number of projections that are in contact with the two lines is 8 or less.
A current collector for a power storage device electrode that increases output and excels in output characteristics while maintaining a high energy density, a method for manufacturing the current collector for a power storage device electrode, and a power storage device having the current collector for a power storage device electrode are provided. The current collector for a power storage device electrode according to the present invention includes an aluminum material and an amorphous carbon coating film formed on the aluminum material. The ratio of sp2bonded carbons to the total amount of sp2bonded carbons and sp3bonded carbons in the amorphous carbon coating film (sp2/(sp3+ sp2)) is 0.35 or more. The ratio (sp2/(sp3+ sp2)) was measured by an X-ray absorption fine structure (XAFS) method.
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
H01M 4/583 - Carbonaceous material, e.g. graphite-intercalation compounds or CFx
H01M 4/587 - Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
H01G 11/28 - Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features arranged or disposed on a current collectorLayers or phases between electrodes and current collectors, e.g. adhesives
H01G 11/68 - Current collectors characterised by their material
H01G 11/70 - Current collectors characterised by their structure
H01G 11/86 - Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
[Problem] To provide a porous body which has a relatively uniform pore distribution and has a smaller pore size. [Solution] The present invention includes: Si as a main component; and Ge dissolved in the Si. The present invention may further include Mg. The present invention may further include Mg. The distribution peak of fine pores having a size of at most 2,000 nm is preferably 10-700 nm.
Applicability to a composite material with high purity and high strength, and a material requiring high conductivity or high thermal conductivity is enhanced. The present invention relates to a multi-walled carbon nanotube having two or more tubes of a graphene sheet where carbon atoms are arranged in a hexagonal honeycomb form, coaxially, wherein a diameter of an outermost wall based on observation of an image by a transmission electron microscope is 3 nm or more and 15 nm or less, and a length based on observation of an image of a scanning electron microscope is 1.0 mm or more, an aggregate of multi-walled carbon nanotubes and a method for preparing the multi-walled carbon nanotube.
This method for manufacturing a seal ring (10) includes: a base ring forming step of using a resin as a material to form a base ring (30) in which an abutment (47) having an overlap in at least an axial direction exists in a gas-tight manner between a one-end side engaging portion (45) on one end side in a circumferential direction and an other-end side engaging portion (46) on the other end side in the circumferential direction; a cavity arrangement step of arranging the base ring (30) in a cavity (101) of a mold (100); a tension ring setting step of setting, in a ring arrangement portion (32) of the base ring (30), a metal tension ring (60) having a gap portion (61) in a position corresponding to the one-end side engaging portion (45) and the other-end side engaging portion (46); and a sealing step of causing liquid resin to flow into the cavity (101) to enclose the tension ring (60) by forming a lid portion (50), and to form retaining portions (36), (51) for preventing the base ring (30) and the lid portion (50) from detaching from one another, between the base ring (30) and the lid portion (50).
A novel method for producing a porous carbon material which makes it possible to easily produce a porous carbon material having a desired shape. The method includes immersing a carbon-containing material having a desired shape and composed of a compound, alloy or non-equilibrium alloy containing carbon in a metal bath, the metal bath having a solidification point that is lower than a melting point of the carbon-containing material, the metal bath being controlled to a lower temperature than a minimum value of a liquidus temperature within a compositional fluctuation range extending from the carbon-containing material to carbon by decreasing the other non-carbon main components, to thereby selectively elute the other non-carbon main components into the metal bath while maintaining an external shape of the carbon-containing material to give a porous carbon material having microvoids.
C22C 32/00 - Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
Provided is a thrust washer with which a sliding load can be reduced. In a thrust washer 20, a front surface and rear surface of a ring-form section 21 are provided with sliding surfaces 26 that slide against other members, an oil groove 25 which is recessed from at least one of the sliding surfaces 26 of the front surface and rear surface and into which lubricating oil enters is also provided, an opening section 27 that is recessed further than the sliding surfaces 26 and that enables lubricating oil to enter from an insertion hole 22 side is present in the oil groove 25 in an inner peripheral end of the ring-form section 21, an outer peripheral end of the ring-form section 21 of at least one oil groove 25 is provided with an oil-stopping wall 28 that divides the oil groove 25 and the outer side of the ring-form section 21 and inhibits lubricating oil in the oil groove 25 from flowing out to the outer peripheral side of the ring-form section 21, the oil-stopping wall 28 is provided to a position that along the thickness direction is approximately the same position as the sliding surface 26, and the sliding area ratio of the ring-form section relative to a projected surface in a plan view is within the range 60-85%.
Provided is a thrust washer capable of reducing a sliding load. In a thrust washer 20, a front surface and a back surface of a ring-shaped part 21 is provided with sliding surfaces 26 that slide with other members, and further at least one of the front surface and the back surface is provided with oil grooves 25 which are recessed from the sliding surface 26 and into which lubricating oil enters. In the oil grooves 25, an opening portion 27 which is recessed from the sliding surface 26 and allows the lubricating oil to enter from an insertion hole 22 side is present on an inner circumferential edge side of the ring-shaped part 21. An outer circumferential edge portion of the ring-shaped part 21 in at least one of the oil grooves 25 is provided with an oil stop wall 28 that separates the oil groove 25 from the outside of the ring-shaped part 21 and prevents the lubricating oil that has entered into the oil groove 25 from flowing out to the outer circumferential side of the ring-shaped part 21. The position of the oil stop wall 28 in the thickness direction is set at about the same position as the sliding surface 26, and the sliding area ratio to a projection plane of the ring-shaped part in plan view is in the range of 60% to 85%.
The purpose of the present invention is to provide a dual ion battery excellent in high-temperature durability. The dual ion battery of the present invention has a positive electrode including a positive electrode current collector and a positive electrode active material disposed thereon, and a negative electrode including a negative electrode current collector and a negative electrode active material disposed thereon. The positive electrode active material includes graphite. The negative electrode active material includes a metal oxide capable of occluding and releasing cations. The positive electrode current collector and the negative electrode current collector are made of an aluminum material covered with an amorphous carbon film.
A cylinder liner according to the present invention is characterized by being made of a flaky graphite cast iron, attached to a cylinder block, having at least a nitrided layer on the inner peripheral surface of the cylinder liner , and having a cross hatch section formed therein, wherein the roughness curve of the inner peripheral surface has a flat honing shape, the ten point average roughness Rz of the inner peripheral surface according to JIS B0601:1982 is no greater than 4.0 μm, and the area fraction of bits formed on the inner peripheral surface has an average value of no greater than 8%.
F02F 1/08 - Shape or arrangement of cooling finsFinned cylinders running-liner and cooling-part of cylinder being different parts or of different material
Provided are a valve guide made of an iron-based sintered alloy excellent in wear resistance and thermal conductivity, and a method of producing the same. Specifically, provided are a method of producing a valve guide made of an iron-based sintered alloy, the method including the steps of: molding raw material powder including diffusion-alloyed powder including core iron powder and Cu bonded to the core iron powder through diffusion to obtain a molded body; and sintering the molded body, to thereby produce a valve guide made of an iron-based sintered alloy, and a valve guide produced by the production method.
Under a state in which the combination oil ring is mounted in an oil ring groove before inserted into a cylinder bore, when an inclined surface of an upper ear portion of an expander spacer is held in contact with an inner peripheral surface of an upper segment and an inclined surface of a lower ear portion of the expander spacer is held in contact with an inner peripheral surface of a lower segment, an upper protrusion amount (P1) from an outer peripheral-side end surface of the expander spacer to an outer peripheral surface vertex of the upper segment is larger than a lower protrusion amount (P2) from the outer peripheral-side end surface of the expander spacer to an outer peripheral surface vertex of the lower segment. When the combination oil ring is inserted into the cylinder bore, the sealing performance can be improved to reduce the oil consumption.
In this piston ring combination, a second outer peripheral surface, which is the outer peripheral surface of a second ring, has a second protruding surface curved into a convex shape outward in the diametrical direction of the second ring, the peak of the convex shape being positioned farthest outward in the second outer peripheral surface along the diametrical direction of the second ring, and a pair of third outer peripheral surfaces, which are the outer peripheral surfaces of a pair of segments, each have a third outer peripheral area in which a third protruding surface is formed, the third protruding surfaces being curved into convex shapes outward in the diametrical direction of an oil ring and the peaks of the convex shapes being positioned farthest outward in the third outer peripheral surfaces along the diametrical direction of the oil ring. In at least one of the pair of third outer peripheral surfaces, the peripheral edge on a crank-chamber side is positioned farther outward in the diametrical direction than the peripheral edge on a combustion-chamber side, and the peak of the third protruding surface is positioned nearer to the crank chamber than the center of the third outer peripheral surface along the axial direction of the oil ring.
Provided is a binder that can be produced by using water as a solvent even when using an electrode active material that is very susceptible to hydrolysis without alkalinizing slurry for an electrode. This binder comprises a pH regulating function agent that neutralizes a base in a water system and a metal crosslinked thickener that crosslinks with metal ions derived from an electrode active material in the water system to form a hydrophobic gel.
This capacitor achieving higher capacitance and higher voltage, and thus exhibiting excellent voltage resistance and higher energy density, is at least constituted from a positive electrode, a negative electrode, and an electrolyte. The positive electrode contains a positive-electrode active material, and the negative electrode contains a negative-electrode active material. The positive-electrode active material and the negative-electrode active material each contain a graphene porous carbon monolith. The graphene porous carbon monolith is a porous carbon monolith comprising graphene. A current collector on the positive electrode side and a current collector on the negative electrode side are each formed from an aluminum member. The aluminum members are each coated with an amorphous carbon film, and the amorphous carbon film has a thickness of 60-300 nm inclusive.
H01G 11/36 - Nanostructures, e.g. nanofibres, nanotubes or fullerenes
H01G 11/24 - Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosityElectrodes characterised by the structural features of powders or particles used therefor
H01G 11/28 - Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features arranged or disposed on a current collectorLayers or phases between electrodes and current collectors, e.g. adhesives
H01G 11/68 - Current collectors characterised by their material
This capacitor achieving higher capacitance and higher voltage, and thus exhibiting excellent voltage resistance and higher energy density, is at least constituted from a positive electrode, a negative electrode, and an electrolyte. The positive electrode contains a positive-electrode active material, and the negative electrode contains a negative-electrode active material. The positive-electrode active material and the negative-electrode active material each contain a graphene porous carbon sheet that contains both a graphene porous carbon material and carbon nanotubes. The graphene porous carbon material is a porous carbon material comprising graphene. A current collector on the positive electrode side and a current collector on the negative electrode side are each formed from an aluminum member. The aluminum members are each coated with an amorphous carbon film, and the amorphous carbon film has a thickness of 60-300 nm inclusive.
H01G 11/36 - Nanostructures, e.g. nanofibres, nanotubes or fullerenes
H01G 11/24 - Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosityElectrodes characterised by the structural features of powders or particles used therefor
H01G 11/28 - Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features arranged or disposed on a current collectorLayers or phases between electrodes and current collectors, e.g. adhesives
H01G 11/68 - Current collectors characterised by their material
96.
Cylinder liner, block manufacturing method and cylinder liner manufacturing method
A cylinder liner that is casted in a block and defines a cylinder bore for one cylinder includes: a cylindrical liner body; a projection part including a plurality of projections on an outer peripheral surface of a part of the liner body; and a bore adjacent part inclined at a predetermined angle to an axial direction of the body and extending in the inclination direction, at a predetermined part between an upper side end and a lower side end of the body, of the outer peripheral surface of the body, which faces another cylinder bore to be adjacent when casted in the block. The outer peripheral surface of the bore adjacent part is positioned more on an inner side of the body than the outer peripheral surface above and below, and is formed such that the projections are absent on at least a part of the outer peripheral surface.
A cylinder liner that is casted in a block and defines a cylinder bore corresponding to one cylinder includes: a cylindrical liner body; a projection part provided so as to include a plurality of projections on an outer peripheral surface of a part of the liner body; and a bore adjacent part formed such that the outer peripheral surface at an upper side end of the liner body is positioned more on an inner side of the liner body than the outer peripheral surface below the upper side end, and the projections are absent on at least a part of the outer peripheral surface at the upper side end, in a predetermined range of the outer peripheral surface of the liner body, which faces another cylinder bore to be adjacent when casted in the block.
The present invention addresses the problem of reducing friction and imparting excellent seizure resistance. Provided is an internal combustion engine comprising: a cast iron cylinder liner having an inner circumferential sliding surface made of cast iron; and a cylinder bore having an inner circumferential sliding surface made of cast iron, wherein the inner circumferential sliding surface includes a region satisfying expressions (1)-(3) below. (1): Rvk/Rk≥1.0, (2): 0.08 μm≤Rk≤0.3 μm, (3) Rk-Rpk>0 (In expressions (1)-(3), Rk is the roughness depth in a core section according to JIS B0671-2:2002, Rpk is the protruding peak height according to JIS B0671-2:2002, and Rvk is the protruding valley depth according to JIS B0671-2:2002.)
The present invention addresses the problem of providing a piston ring coated with a DLC coating that has excellent wear resistance and a low attacking property against a cylinder bore sliding surface. The problem is resolved by means of a piston ring used with engine lubricating oil and having a DLC coating on the outer circumferential sliding surface, wherein the DLC coating has an sp2 component ratio of 0.5 to 0.85, inclusive, measured using a TEM-EELS spectrum obtained by combining a transmission electron microscope (TEM) and electron energy loss spectroscopy (EELS), a coating hardness of 12 GPa to 26 GPa, inclusive, measured by nanoindentation, and a Young's modulus of no more than 250 GPa.
Provided are a segment, a combination oil ring, and a manufacturing method for a segment, which are capable of preventing independent rotation of the segment while dealing with reduction in tension of the combination oil ring. Specifically, provided is a segment being slidable in an axial direction of a cylinder under a state in which an inner peripheral surface of the segment is pressed by ear portions formed in an expander spacer in a circumferential direction and an outer periphery side of the segment is pressed against an inner wall of the cylinder, in which the inner peripheral surface of the segment has at least two or more dross-projecting portions in the circumferential direction, and the dross-projecting portions have a projection height of from 4 μm to 25 μm.
patents
