Abstract: The invention relates to a semi-annular sliding bearing shell comprising two circumferential end sections (14, 16) and a radial inner face (10) along which a sliding surface (12) lies. Said bearing shell also comprises grooves (18) which are formed on the inner face (10) in the region of at least one of the end sections (14, 16), which run in the circumferential direction, and which are separated in the axial direction. The grooves (18) run inwards on the circumferential end (16, 18) of the sliding bearing shell beginning in the circumferential direction with a decreasing width B and with a decreasing depth T. A groove (18) lies on the exterior of each side in the axial direction, said groove intersecting the corresponding axial edge (24, 26) of the sliding surface.

Abstract: A slide bearing has at least one bearing shell for accommodating a component to be supported. The at least one bearing shell has a device for monitoring a bearing gap between the bearing shell and the component to be supported. The bearing shell is provided with a slide surface that has an elevation along each of its curved edge regions.

Abstract: A connecting rod bearing is constituted of a pair of semi-cylindrical bearings I and II. In a state in which the semi-cylindrical bearings are assembled into a cylindrical shape, along two contact surfaces C of circumferential end surfaces, first axial oil grooves E are formed to be located at a central portion in a bearing width direction, and second axial oil grooves F are formed to be located at both sides in the bearing width direction of each of the first axial oil grooves E. One of the first axial oil grooves E and two of the second axial oil grooves F are in relation to communicate with each other. The first axial oil groove E is formed in the range of the wall thickness decreasing region surface A.

Abstract: A sliding bearing is constructed by an upper split bearing half and a lower split bearing half. The upper split bearing half has a sliding surface, in which an oil groove which allows a lubricating oil to flow therein is formed over the entire circumferential extent of the sliding surfaced. The oil groove extends through a crush relief to be open to a junction area, and the oil groove has a bottom which is formed so that a portion disposed toward the junction area as considered in the circumferential direction of the crush relief is located closer to the center of the upper split bearing half in comparison to a central portion. An ingress in large quantities of foreign particles within the oil groove onto the sliding surface of the sliding bearing and into a connecting rod bearing after passing through a lubricating oil feed passage is suppressed, and an oil leakage through the crush relief is reduced, allowing a lubricating oil pressure to be secured and augmented.

Abstract: A crank bearing is disclosed that includes a semicircular upper bearing and a semicircular lower bearing, which can be split from each other. The upper bearing includes a first oil passage for introducing engine oil from the outside to a gap between the crank bearing and a crank journal, and a second oil passage for permitting the engine oil to flow in the circumferential direction of the crank bearing. The first oil passage includes an inner circumference opening, which is open to the inner circumference of the main bearing. The upper bearing includes a non-undercut portion in which no oil passage is formed on the trailing side of the inner circumference opening in the rotational direction of the crank journal.

Abstract: Disclosed is a connecting rod bearing for crankshafts having a pair of semi-cylindrical bearings. Circumferential grooves (CG) on the bearing inner surface extend from each circumferential end toward the circumferential center within a maximum circumferential angle of 45 degrees and divide reduced wall thickness region into two sections. Axial grooves communicating with the CG are provided along abutted ends of the bearings. Circumferential length of the CG is larger than that of the reduced region. Depth of the CG becomes gradually smaller from the end toward the center. Width of the CG is not smaller than one-quarter of a diameter of lubricant-oil outlet of internal lubricant-oil passage in a crankpin and less than the diameter. Cross-sectional area of the CG is larger than that of the axial grooves at a connection portion thereof.

Abstract: A main bearing (20) for supporting a rotating crankshaft (56) includes an upper shell (22) and a lower shell (24). An upper inner surface (32) of the upper shell (22) has an oil supply groove (26) extending circumferentially therealong, an oil stem groove (28) extending obliquely from the oil supply groove (26), and a pair of oil distribution grooves (30) extending from the oil stem groove (28) along and parallel to the oil supply groove (26) to present an F-shape along the upper inner surface (32) of the main bearing (20). The oil grooves (26, 28, 30) provide for improved lubrication of the main bearing (20) at startup and when the engine is idle or stopped, especially in electric and hybrid vehicles. The main bearing (20) also has exceptional strength and load bearing capacity.

Abstract: Disclosed is a sliding bearing for an internal combustion engine which is used as a cylindrical bearing by combining a pair of semi-cylindrical bearings. An axial groove A exists between the circumferential end surface and an opposite circumferential end surface. A circumferential oil groove and the axial groove A communicate with each other, depths of the circumferential oil groove in the communication portion and the axial groove A in the circumferential end surfaces differ from each other, and a groove bottom of the circumferential oil groove is located at a position displaced to a side of the inner circumferential bearing surface from the groove bottom of the axial groove A. A cross-sectional area of the circumferential oil groove in the communication portion is larger than a cross-sectional area of the axial groove A.

Abstract: A bearing component and bearing assembly are disclosed. The bearing component includes structure for providing a hard rotation stop, in one embodiment, the anti-rotation structure includes a slot formed in at least one bearing component having a surface for supporting a bearing shell. The slot has a longitudinal axis at an oblique angle to a plane perpendicular to the surface for supporting the bearing shell. In other embodiments, a groove extends radially outward from a surface of at least one component for supporting a bearing shell to a side of the component. The groove has a depth that increases as a function of distance in a direction parallel with a center axis of the component.

Abstract: A bearing apparatus includes: two split outer ring halves which includes outer ring raceway surfaces and are disposed within a supporting hole of the housing, respectively; and a plurality of rollers which are disposed on respective inner surfaces of the both split outer ring halves and supports a shaft. Each of the two split outer ring halves includes an oil hole penetrating the split outer ring half in a radial direction thereof and an oil groove formed on an outer diameter surface of the split outer ring half along a circumferential direction thereof to allow the oiling passage and the oil holes to communicate with each other. Each of the oil holes is disposed at a position located at an angle of within 45° from the joint surface of the split outer ring halves in an opposite direction to a rotating direction of the shaft.

Abstract: A sliding bearing has a pair of semi-cylindrical bearings assembled together to form a cylindrical configuration. At least one of the semi-cylindrical bearings is provided with an inner surface circumferentially extending oil groove extending a central portion of the circumferential length of the semi-cylindrical bearing. A bottom surface of the oil groove has an ups and downs form consisting of a plurality of ridges and valleys, which sinusoidally undulate consecutively without a flat portion therebetween. The dimensional relationship between a typical ridge and the adjacent valleys is defined by the formula h<0.15H where H indicates the groove depth and h indicates an elevation difference of the ups and downs of the bottom surface, namely a height of the ridges where h is preferably not less than 10 ?m.

Abstract: The bearing system for an automotive engine includes a first bearing support structure formed in a cylinder block bulkhead and having a first bearing insert. A second bearing support structure is removably mounted to the first bearing support structure and contains a second bearing insert. A lubrication channel formed in an inside diameter of the first bearing insert and an inside diameter of the second bearing insert extends along a portion of the first bearing insert from a smaller bearing clearance position offset from a first bearing parting line and into a smaller bearing clearance portion of the second bearing insert extending past a second bearing parting line. The lubrication channel provides an improved flow of oil to a drilled passage formed in a shaft, such as a crankshaft, to feed oil to various bearings, such as connecting rod bearings, while reducing oil leakage from such a bearing system.

Abstract: A connecting rod bearing for internal combustion engines of a forced-feed lubrication type crank shaft is provided, consisting semicircular bearings. An inner surface of the semicircular bearings is provided with a circumferential groove formed on the inner surface within a maximum circumferential angle range of 45 degrees, measured from one circumferential end facing the same direction as a rotational direction of the crankpin toward a circumferential center region of the semicircular bearing, each of the semicircular bearings having two circumferential ends which are of butt ends brought into contact with those of a mating semicircular bearing. In an assembled state, an axial groove is formed on an inner surface of the semicircular bearings so as to extend along the butt end throughout a full length between both axial ends of the semicircular bearing, whereby the axial groove, as a lubricant-oil flow channel, is connected with the circumferential groove.

Abstract: A bearing (crank bearing 6) is constituted of an upper bearing (61) that is attached to a cylinder block, a lower bearing (67) that is attached to a crank cap, and a bearing filter (71) for filtering engine oil. The bearing filter (71) is fitted in an oil hole (62A) of the upper bearing (61).

Abstract: Disclosed is a sliding bearing for supporting a crankshaft journal portion of an internal combustion engine. One of the semi-cylindrical bearings is provided with a circumferential oil groove on its inner circumferential surface, and has two circumferential ends. The circumferential oil groove has an open groove end at at least one of the two circumferential ends, which one is a first circumferential end being directed to the same direction as a relative rotational direction of a crankshaft. The other semi-cylindrical bearing is provided with at least one circumferential local groove on its inner circumferential surface, and has two circumferential ends. The circumferential local groove has an open groove end at one of the two circumferential ends, which one is a second circumferential end being directed to the opposite direction to the relative rotational direction of the crankshaft. The circumferential oil groove and the local circumferential groove are in fluid communication with each other.

Abstract: A lubrication system comprising a bore including an inlet for receiving lubrication, an outlet for distributing lubrication, and a inner passageway extending between the inlet and outlet is provided. The outlet may be provided with a wider opening than the passageway. The outlet may further include a groove having a radius of curvature, and defined by a pair of flat or curved sidewalls, and a pair of curved end walls each extending toward the inner passageway.

Abstract: A crankshaft of an internal combustion engine has journals provided with shaft oil passages for carrying the oil to crankpins, and guide grooves having parts in which the shaft oil passages open, respectively, and opening in the cylindrical surfaces of the journals, respectively. The guide grooves has downstream end parts into which the shaft oil passages open, respectively, and extend in a circumferential direction in which the crankshaft rotates from the downstream end parts, respectively. First half bearing members of bearings are provided in their bearing surfaces with oil grooves through which the oil is supplied to the guide grooves, respectively. Each of the oil grooves are diametrically opposite to each of the guide grooves. The oil grooves have an axial width (W5) smaller than the axial width (W3) of the guide grooves. Thus oil leakage from gaps between each of the bearings and each of the journals of the crankshaft is reduced and hence an oil pump having a small capacity can be used.

Abstract: Disclosed is a sliding bearing for an internal combustion engine for supporting a crankshaft including a pair of semi-cylindrical bearings combined with each other into a cylindrical body. Each of inner circumferential surfaces of the respective semi-cylindrical bearings includes first and second curved surfaces following two kinds of arcs with different curvatures. The first curved surface is in a region including a circumferential central portion of the inner circumferential surface. The second curved surfaces are in remaining two regions of the inner circumferential surface. The circumferential oil groove and the axial groove communicate with each other. The circumferential grooves of the second curved surfaces and the axial groove communicate with each other. The groove bottoms of the circumferential grooves of the second curved surfaces are displaced to a side of the bearing inner circumferential surface from a groove bottom of the axial groove.

Abstract: Disclosed is a connecting rod bearing for crankshafts having a pair of semi-cylindrical bearings. Circumferential grooves (CG) on the bearing inner surface extend from each circumferential end toward the circumferential center within a maximum circumferential angle of 45 degrees and divide reduced wall thickness region into two sections. Axial grooves communicating with the CG are provided along abutted ends of the bearings. Circumferential length of the CG is larger than that of the reduced region. Depth of the CG becomes gradually smaller from the end toward the center. Width of the CG is not smaller than one-quarter of a diameter of lubricant-oil outlet of internal lubricant-oil passage in a crankpin and less than the diameter. Cross-sectional area of the CG is larger than that of the axial grooves at a connection portion thereof.

Abstract: Disclosed is a sliding bearing for an internal combustion engine which is used as a cylindrical bearing by combining a pair of semi-cylindrical bearings. An axial groove A exists between the circumferential end surface and an opposite circumferential end surface. A circumferential oil groove and the axial groove A communicate with each other, depths of the circumferential oil groove in the communication portion and the axial groove A in the circumferential end surfaces differ from each other, and a groove bottom of the circumferential oil groove is located at a position displaced to a side of the inner circumferential bearing surface from the groove bottom of the axial groove A. A cross-sectional area of the circumferential oil groove in the communication portion is larger than a cross-sectional area of the axial groove A.

Abstract: A crank bearing is disclosed that includes a semicircular upper bearing and a semicircular lower bearing, which can be split from each other. The upper bearing includes a first oil passage for introducing engine oil from the outside to a gap between the crank bearing and a crank journal, and a second oil passage for permitting the engine oil to flow in the circumferential direction of the crank bearing. The first oil passage includes an inner circumference opening, which is open to the inner circumference of the main bearing. The upper bearing includes a non-undercut portion in which no oil passage is formed on the trailing side of the inner circumference opening in the rotational direction of the crank journal.

Abstract: A sliding bearing shell is described, comprising at least one holding cam (4) which is provided in the region of the dividing surface (2), projects beyond the back (3) of the shell and forms a deformation section of the sliding bearing shell (1) which extends over only a part of the thickness of the shell. In order to provide advantageous constructional conditions it is proposed that the deformation section consists of a tongue (5) which is cut out and bent out partly from the sliding bearing shell (1) through an indentation (6) starting from the dividing surface (2).

Abstract: Disclosed is a connecting rod bearing for internal combustion engines of a forced-feed lubrication type crank shaft. A connecting rod bearing as a preferred embodiment consists of a pair of semicircular bearings. An inner surface of at least one of the semicircular bearings is provided with at least one circumferential groove which is formed on the inner surface within a maximum circumferential angle range of 45 degrees, measured from one circumferential end facing the same direction as a rotational direction of the crankpin toward a circumferential center region of the semicircular bearing, each of the semicircular bearings having two circumferential ends which are of butt ends brought into contact with those of a mating semicircular bearing.

Abstract: A collar bearing comprising a bearing shell and at least one thrust washer, whereby the at least one thrust washer is fixed on an outer convex circumferential surface of the bearing shell to define a joint site that extends between the convex outer circumferential surface of the bearing shell and a concave inner circumferential surface of the thrust washer, the at least one thrust washer being welded along a weld seam to the bearing shell such that the weld seam extends axially between an outer thrust facing and an opposite inner surface of the at least one thrust washer, and the weld seam extends over only a part of the joint site.

Abstract: An oil-feeding device for a crankshaft where the amount of lubricant oil leaking from supporting areas of main journal portions is reduced without increasing friction of bearing members against the main journal portions. The oil-feeding device for a crankshaft includes upper bearing members and lower bearing members. The upper and lower bearing members have a half hollow cylindrical shape, are provided with crush relief portions at both ends, and jointly encompass main journal portions of a crank shaft. The upper bearing members have circumferentially extending oil grooves provided in the faces opposite the main journal portions, the grooves penetrating through oil passages of a cylinder block. The lower bearing members do not have oil grooves. The oil grooves do not extend in the crush relief portions, and therefore the leakage of lubricant oil, fed to the oil grooves, to the areas of the crush relief portions is suppressed.

Abstract: A plain bearing comprising a housing and two plain bearing halves forming a cylindrical shape in combination and fixed in the housing. Each of the plain bearing halves has crush reliefs formed at both ends of an inner circumferential surface thereof in a circumferential direction, an oil groove formed on the inner circumferential surface thereof and extending in the circumferential direction, a central crown portion at substantially central position in the circumferential direction and in communication with the oil groove, and inflow preventing portions formed between the crush reliefs and the oil groove.

Abstract: In one embodiment according to the invention, there is disclosed a bearing for surrounding a rotating shaft. The bearing comprises at least one external opening communicating with an exterior of the bearing; and at least one ramped internal cavity, each cavity communicating with one of the at least one external openings and an interior of the bearing. In another embodiment, there is disclosed a method for urging a lubricating fluid into an internal pressure gallery of a rotating shaft.

Abstract: The subject invention provides a thrust bearing assembly having only three thrust flanges in total. One portion of the thrust bearing assembly comprises a main bearing having an arcuate bearing shell with a concave inner surface and a convex outer surface. A thrust washer having hydrodynamic features abuts one of the edges of the main bearing and extends radially outwardly from the outer surface thereof forming a thrust surface. The other of the edges of the main bearing is free of a flange. The free edge of the main bearing is preferably spaced inward from other thrust surfaces and the edge has a substantially narrower width than the other thrust surfaces.

Abstract: A rotary shaft pump for increasing supplied oil pressure to a pressure responsive device in an internal combustion engine. The pump includes a housing adapted to carry a plurality of axially spaced journals of a rotatable shaft. The shaft also includes at least one pumping element having a larger diameter than the other journals of the shaft. A cam phaser carried on one end of the shaft receives pressurized oil from the engine through oil passages extending through the housing and the shaft. As the oil is pumped through the oil passages of the shaft, the oil is centrifugally pumped through a radially extending pumping passage extending though the pumping element to boost oil pressure supplied to the cam phaser.

Abstract: An engine bearing for an internal combustion engine has a pair of separately constructed bearing halves comprising a pair of arcuate shells having a pair of laterally spaced flanges extending generally radially outwardly from each shell. Each pair of laterally spaced flanges comprises a pair of thrust faces facing generally away from one another with one of the thrust faces comprising an undulating contoured surface and the other thrust face having a generally planar non-contoured surface. The engine bearing is assembled having the contoured surface of one engine bearing half abutting the non-contoured surface of the other engine bearing half so that the engine bearing has generally opposite sides comprising both contoured and non-contoured surfaces.

Abstract: A bearing shell for a crankshaft thrust bearing has a circumferential oil passage (4) formed on the inside of shell (6) of bearing shell (1). An oil passage (4) is connected via a hole (2) to the outside of and to a groove (7) running to one of flanges (5) and a hole (9) at the end of shell (1). In this way, the flange (8) is supplied oil to achieve improved lubrication in the axial loading direction.

Abstract: A plain bearing is described, the bearing being fitted, in use, in an associated bearing housing, the bearing back in contact with said housing is substantially coextensive with the housing in the axial direction wherein the running surface of the bearing is relieved in both the axial and radial directions so as to reduce the contact bearing surface area with an associated shaft journal, in use.

Abstract: To provide a bearing device for a rotary shaft which can further restrain the damage to a sliding bearing, by determining the position of a parting surface of the sliding bearing taking into account the position of the maximum pressure of an oil film. A bearing device includes a pair of sliding bearings for rotatably bearing a crankshaft of an internal combustion engine, and an oil supply passage for supplying a lubricating oil into clearances between the crankshaft and the sliding bearings. The sliding bearings are composed of bearing halves bisected at a parting surface located on a flat plane, substantially orthogonal to the direction of the maximum pressure of the oil films, formed of the lubricating oil in the clearances. The bearing device is applicable to an internal combustion engine including a cylinder having an inclined cylinder axis, which reduces the vibration and noise of the internal combustion engine.

Abstract: A half bearing constituting a cylindrical plain bearing for supporting a shaft for rotation when two of the half bearings are combined together. The half bearing has two circumferential ends each of which has a plurality of circumferential grooves without formation of any crush relief surface. The grooves extend substantially over an overall circumferential dimension of the half bearing and include portions located at both circumferential ends of the half bearing respectively. Each portion has a larger axially sectional area than the grooves formed in a portion of the half bearing mainly subjected to load during rotation of the shaft.

Abstract: A shaft bearing member includes an inner circumferential face serving as a sliding surface, an oil groove formed in the inner circumferential face so as to circumferentially extend, and a recess formed in the inner circumferential face so as to extend from at least one of both widthwise sides of the oil groove toward axial end side of the inner circumferential face with respect to the shaft so that the recess is rendered shallower and shallower.

Abstract: To provide a bearing device for a rotary shaft which can further restrain the damage to a sliding bearing, by determining the position of a parting surface of the sliding bearing taking into account the position of the maximum pressure of an oil film. A bearing device includes a pair of sliding bearings for rotatably bearing a crankshaft of an internal combustion engine, and an oil supply passage for supplying a lubricating oil into clearances between the crankshaft and the sliding bearings. The sliding bearings are each composed of bearing halves bisected at a parting surface located on a flat plane, substantially orthogonal to the direction of the maximum pressure of the oil films, formed of the lubricating oil in the clearances.

Abstract: A sliding structure including first and second sliding elements made of metal and including first and second sliding surfaces relatively slidable via a lubricating oil film therebetween, in which at least one of the first and second sliding surfaces having a microscopic surface structure including a base portion, dimples inward recessed from the base portion and separated from one another, and a peripheral portion defining the opening area of each of the dimples and extending along a periphery of each of the dimples. A ratio of a sum of opening areas of the dimples to an area of the at least one of the first and second surfaces is in a range of 5% to 60%. The peripheral portion has a height smaller than a thickness of the lubricating oil film.

Abstract: A shaft bearing member for supporting a shaft so that the shaft is rotatable has an inner circumferential face serving as a sliding surface. The shaft bearing member includes an oil groove formed in the inner circumferential face so as to circumferentially extend, and a plurality of narrow grooves formed on the inner circumferential face so as to extend at a predetermined angle relative to a rotation direction of the shaft from at least one of both widthwise sides of the oil groove toward an axial end side of the inner circumferential face with respect to the shaft. The narrow grooves guide a lubrication oil from the oil groove toward the axial end side with rotation of the shaft. The narrow grooves are shallower and narrower than the oil groove.

Abstract: The invention relates to a bearing shell for a crankshaft thrust bearing. The bearing shell has a circumferential oil passage (4) formed on the inside of shell (6) of bearing shell (1). Oil passage (4) is connected via a hole (2) to the outside of and to a groove (7) running to one of flanges (5) and (8) at the end of shell (1). In this way, flange (8) is supplied oil to achieve improved lubrication in the axial loading direction.

Abstract: It is an object of the invention to improve wear resistance and an anti-seizure property of a portion , on which a radial load operates owing to tension of a cogged belt or a V-belt, of a plain bearing for an engine. A main shaft portion of a crankshaft is in uneven contact with an upper half bearing owning to tension of the cogged belt and/or the V-belt. A branch groove is formed in a portion forwarder than an oil groove formed on the bearing surface of a upper half bearing of a plain bearing, the branch groove branching off from the oil groove. When an engine stops, lubricant is stored within the branch grooves, and when the engine restarts, the lubricant within the branch grooves is immediately supplied to the uneven contact portion of the main shaft portion though the rotation thereof.

Abstract: There is disclosed a sliding bearing provided with a sliding bearing layer and a back metal layer bonded to the outer face of the sliding bearing layer, the back face of which back metal layer being coated with a phosphate coating at a portion where fretting wear is apt to occur while coated with a coating of a thermally good conductor at another portion where no phosphate coating is provided, whereby seizure resistance as well as fretting resistance is improved because the dispersing of heat can be improved by the coating of the thermally good conductor.

Abstract: A combination of a bearing and a housing for the bearing in an internal combustion engine as described, the bearing including two substantially semi-circular half-bearing shells comprising a first half-shell bearing having a first wall thickness and a second half-shell bearing having a second wall thickness wherein the first wall thickness is different from the second wall thickness and the first and second half-shells have a substantially common bore diameter when assembled in the housing.

Abstract: A lubricating oil discharge port is provided that is improved so well that a quick supply of lubricating oil is not disturbed and that film lubrication is not lost when the engine is started. The lubricating oil discharge port 18a for allowing lubricating oil to flow out of a lubricating oil passage 18 in which an oil pressure source is provided at a lower portion thereof into a bearing bore 12 for a camshaft 10 of an engine is made to open in a top surface of a boss 19 provided so as to protrude from a bottom of a recessed well 15 acting as a lubricating oil reservoir provided in an inner circumferential surface on a lower side of the camshaft bearing bore.

Abstract: A rotary slide bearing part of a rotary slide slit bearing for supporting a rotary shaft thereon in a rotatable manner, has a first bearing surface portion adapted to be arranged adjacent to a second bearing surface portion of another rotary slide bearing part of the rotary slide slit bearing, a load from the shaft to be borne by the first bearing surface portion is larger than a load from the shaft to be borne by the second bearing surface portion, the first bearing surface portion includes a fluidal pressure generating surface facing close to the shaft to generate a fluidal pressure between the fluidal pressure generating surface and the shaft, a main groove arranged at an circumferential end of the first bearing surface portion adjacent to the second bearing surface portion, and a sub-groove extending from the main groove in a circumferential direction of the first bearing surface portion, and an axial width of the sub-groove is smaller than that of the main groove.

Abstract: Plain bearing elements comprise at least one single-layer metallic bearing material (4) having a sliding surface (6) with lubricating oil pockets (10). The depth (T) of the open oil pockets (10) is 0.03 mm to 0.3 mm, and the ratio of the pocket area to the pocket depth is 10 to 40 mm. The plain bearing elements exhibit superior running qualities and properties. The depth of the oil pockets (10) may be adapted to the service viscosity of the lubricating oil. The oil pockets (10) in the same plain bearing element may also have varying depths (T) and be provided only in predetermined regions of the plain bearing element.

Abstract: In a slide bearing attached onto a bearing mounting surface including at least one of recess and hole facing to the slide bearing, a bearing surface faces to a counter member to be borne movably by the slide bearing, a reverse surface contacts with the bearing mounting surface, and a relief surface is arranged adjacent to the at least one of recess and hole in a slide bearing thickness direction and faces to the counter member with a relatively large clearance between the relief surface and the counter member in comparison with a clearance between the bearing surface and the counter member.

Abstract: In order to take account of dimensional variations in crankcases and connecting rods, the lower bearing shell (9) in the unmounted state is formed such that the outer contour is in the shape of an arc having a radius r.sub.a and the inner contour has the shape of a semi-ellipse having semi-axes a.sub.i and b.sub.i. The bearing semi-axis a.sub.i passes through the vertex (19) of the lower bearing shell (9). When the bearing is mounted, the contour of the upper bearing shell (8) remains unchanged while the lower bearing shell (9) is slightly deformed such that its outer contour assumes the shape of a semi-ellipse having semi-axes a.sub.a and b.sub.a. The short semi-axis b.sub.a passes through the vertex (19) of the lower bearing shell (9).

Abstract: A bearing supporting a crankshaft provided in a connecting rod comprises an overlay in contact with a throw, a metal layer on the outside of the overlay and a back metal on the outside of the metal layer. The hardness of the metal layer is lower than that of the back metal, and the thermal conductivity of the overlay is higher than that of the throw. The metal layer having a lower hardness than the back metal improves the fit of the bearing with the throw, and sharp increase of frictional losses and rise of lubricating oil temperature at high engine rotation speeds are thereby prevented. The overlay having a high thermal conductivity absorbs heat from the minimum thickness oil film formed between the inner surface region of the throw and the bearing, and after the bearing has passed through the minimum thickness oil film, the absorbed heat is again discharged to the lubricating oil.

Abstract: A half bearing constituting a cylindrical plain bearing for supporting a shaft for rotation when two of the half bearings are combined together. The half bearing has two circumferential ends each of which has a plurality of circumferential grooves without formation of any crush relief surface. The grooves extend substantially over an overall circumferential dimension of the half bearing and include portions located at both circumferential ends of the half bearing respectively. Each portion has a larger axially sectional area than the grooves formed in a portion of the half bearing mainly subjected to load during rotation of the shaft.

Abstract: A sliding bearing for an internal combustion engine; the sliding bearing having a groove formed substantially circumferentially on an inner circumferential face of the sliding bearing; the width of the groove being smaller than 0.6 mm, and the ratio of the width of the groove to depth of the groove being larger than 40.