Abstract: Fluid control apparatus for use with vehicle clutches are disclosed. A disclosed clutch coupling assembly for a vehicle includes a housing defining a cavity. The clutch coupling assembly also includes a fluid reservoir fluidly coupled to the cavity. The clutch coupling assembly also includes a clutch positioned in the cavity. Rotation of the clutch is to convey a fluid from the cavity to the fluid reservoir. The clutch coupling assembly also includes a pump operatively coupled to the housing to control the fluid. Operation of the pump is to convey the fluid from the fluid reservoir to the cavity when the clutch is in an engaged state.

Abstract: Fluid control apparatus for use with vehicle clutches are disclosed. A disclosed clutch coupling assembly for a vehicle includes a housing defining a cavity. The clutch coupling assembly also includes a fluid reservoir fluidly coupled to the cavity. The clutch coupling assembly also includes a clutch positioned in the cavity. Rotation of the clutch is to convey a fluid from the cavity to the fluid reservoir. The clutch coupling assembly also includes a pump operatively coupled to the housing to control the fluid. Operation of the pump is to convey the fluid from the fluid reservoir to the cavity when the clutch is in an engaged state.

Abstract: A torque coupling system including an input shaft, a main cam affixed to the input shaft, a clutch housing that surrounds the input shaft and provides an inter space, a scoop plate affixed to the clutch housing, an external housing that encloses the clutch housing and provides an outer space, and a main clutch that is articulable between a disconnected drive mode and a all-wheel drive mode. In the disconnected drive mode the main clutch disengages the input shaft from the clutch housing and the main cam rotates with the input shaft to transfer lubricant from the inner space to the outer space while in the all-wheel drive mode the main clutch engages the input shaft with the clutch housing and the scoop plate rotates with the clutch housing to scoop the lubricant from the outer space to inner space through the catch tank.

Abstract: A torque coupling system including an input shaft, a main cam affixed to the input shaft, a clutch housing that surrounds the input shaft and provides an inter space, a scoop plate affixed to the clutch housing, an external housing that encloses the clutch housing and provides an outer space, and a main clutch that is articulable between a disconnected drive mode and a all-wheel drive mode. In the disconnected drive mode the main clutch disengages the input shaft from the clutch housing and the main cam rotates with the input shaft to transfer lubricant from the inner space to the outer space while in the all-wheel drive mode the main clutch engages the input shaft with the clutch housing and the scoop plate rotates with the clutch housing to scoop the lubricant from the outer space to inner space through the catch tank.

Abstract: Provided is a lubricating oil composition for a differential gear unit that is effective in limiting the generation of noise and vibrations even when a limited-slip differential is operated. The lubricating oil composition contains (A) a mineral oil and/or (B) a synthetic oil and (C) a friction modifier selected from amide- and imide-based friction modifiers and derivatives thereof in an amount of 0.01 to 10 percent by mass on the basis of the total mass of the composition. Also provided is a differential gear unit that is lubricated with the lubricating oil composition.

Abstract: Plural spline shafts are arranged around columnar plasma, and plural spline shafts are coaxially aligned in a direction that the columnar plasma extends within a vacuum chamber. The plural coaxially aligned spline shafts are positioned so that axial gap is formed between the respective male spline sections. The axial gap of the plural male spline sections is positioned at a center of the columnar plasma in the direction that the columnar plasma extends.

Abstract: A clutch plate in an annular shape, the clutch plate includes: a plurality of lubricating grooves on one end face and the other end face of the clutch plate in an axial direction; and a plurality of windows passing through the clutch plate in the axial direction. The lubricating grooves are formed with plastic deformation, in a same phase on both the end faces, and extended up to outer peripheral edges and inner peripheral edges of both the end faces. A plurality of intersection points where the lubricating grooves intersect with each other are positioned in other areas than at least one of the outer peripheral edges, radially outer edges of the windows, radially inner edges of the windows, and the inner peripheral edges, of both the end faces.

Abstract: In a clutch plate of an annular shape and a wet type, a plurality of lubrication grooves each taking a U-shape in cross-section are formed on a friction engaging surface on at least one end side. The groove is provided with a groove forming portion crossing the circumferential direction and blunt portions extending along both sides of the groove forming portion and connecting the friction engaging surface with the groove forming portion. Where a straight line passing across one side end of the groove and extending in a radial direction is assumed as a virtual straight line, in a section of the groove taken along a plane that is orthogonal to the virtual straight line and that includes the one side end, the width of the blunt portion on one side is in a range of 0.12 to 0.35 mm, and the depth of the blunt portion is in a range of 25 to 50 ?m.

Abstract: A clutch plate arranged to face a contact object so as to be relatively rotatable and relatively movable includes a contact surface being able to contact the contact object via lubricant and a minute groove open at the contact surface and formed of a plurality of groove portions having a predetermined groove pitch. A ratio of a contact area of the contact surface to an area obtained by adding an opening area of the minute groove to the contact area of the contact surface is 90% to 96% in an initial state.

Abstract: An annular wet clutch plate has lubrication grooves formed of multiple grooves in at least one of both axial end faces, the at least one of the both end faces having the lubrication grooves and a frictional engagement surface. The frictional engagement surface has a plurality of small grooves having a width and a depth that are smaller than those of the lubrication grooves. At least one of the small grooves is extended in a direction that crosses a circumferential direction of the annular clutch plate. A mean value of surface roughness of the frictional engagement surface having the small grooves is from 3.0 ?m to 4.0 ?m when the surface roughness is measured with the use of Rz at three positions that are offset from each other by 120° in the circumferential direction around a central axis of the annular clutch plate.

Abstract: A lubricating oil according to the present invention is a lubricating oil used in a friction-type driving force transmission apparatus, the lubricating oil including: at least one of two additives; a first additive selected from at least one of an aliphatic amine having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 1) and an aliphatic amine ethylene oxide adduct having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 2); and a second additive selected from at least one of a phosphorous acid diester having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 3) and a phosphorous acid monoester having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 4).

Abstract: A sliding member includes a base material portion formed of steel; a nitrogen diffusion layer with a thickness of 10 ?m to 50 ?m; and a nitrogen compound layer with a thickness of 10 ?m to 50 ?m. The nitrogen compound layer and the nitrogen diffusion layer are formed by performing a first heating process of performing heat treatment on a material formed of steel in an ammonia atmosphere at a temperature of 570° C. to 660° C., a second heating process of performing heat treatment on the material in a non-oxidizing and non-ammonia atmosphere at a temperature of 660° C. to 690° C., the temperature in the second heating process being higher than the temperature in the first heating process, and an oil cooling process of performing oil cooling treatment at an oil temperature of 60° C. to 80° C. subsequently to the second heating process.

Abstract: In a clutch plate of an annular shape and a wet type, a plurality of lubrication grooves each taking a U-shape in cross-section are formed on a friction engaging surface on at least one end side. The groove is provided with a groove forming portion crossing the circumferential direction and blunt portions extending along both sides of the groove forming portion and connecting the friction engaging surface with the groove forming portion. Where a straight line passing across one side end of the groove and extending in a radial direction is assumed as a virtual straight line, in a section of the groove taken along a plane that is orthogonal to the virtual straight line and that includes the one side end, the width of the blunt portion on one side is in a range of 0.12 to 0.35 mm, and the depth of the blunt portion is in a range of 25 to 50 ?m.

Abstract: A formation method of a coating that coats a coated body with the coating includes: generating cylindrical plasma in a vacuum deposition chamber as well as supplying material gas into the vacuum deposition chamber; applying pulse voltage to the coated body; and attaching a shield member that shields an uncoated member to an uncoated part where the coating of the coated body is not formed with separation spacing over a coated part where the coating is to be formed for preventing decrease of hardness of the coating in the coated part.

Abstract: An annular wet clutch plate has lubrication grooves formed of multiple grooves in at least one of both axial end faces, the at least one of the both end faces having the lubrication grooves and a frictional engagement surface. The frictional engagement surface has a plurality of small grooves having a width and a depth that are smaller than those of the lubrication grooves. At least one of the small grooves is extended in a direction that crosses a circumferential direction of the annular clutch plate. A mean value of surface roughness of the frictional engagement surface having the small grooves is from 3.0 ?m to 4.0 ?m when the surface roughness is measured with the use of Rz at three positions that are offset from each other by 120° in the circumferential direction around a central axis of the annular clutch plate.

Abstract: A formation method of a coating that coats a coated body with the coating includes: generating cylindrical plasma in a vacuum deposition chamber as well as supplying material gas into the vacuum deposition chamber; applying pulse voltage to the coated body; and attaching a shield member that shields an uncoated member to an uncoated part where the coating of the coated body is not formed with separation spacing over a coated part where the coating is to be formed for preventing decrease of hardness of the coating in the coated part.

Abstract: A clutch plate arranged to face a contact object so as to be relatively rotatable and relatively movable includes a contact surface being able to contact the contact object via lubricant and a minute groove open at the contact surface and formed of a plurality of groove portions having a predetermined groove pitch. A ratio of a contact area of the contact surface to an area obtained by adding an opening area of the minute groove to the contact area of the contact surface is 90% to 96% in an initial state.

Abstract: Plural spline shafts are arranged around columnar plasma, and plural spline shafts are coaxially aligned in a direction that the columnar plasma extends within a vacuum chamber. The plural coaxially aligned spline shafts are positioned so that axial gap is formed between the respective male spline sections. The axial gap of the plural male spline sections is positioned at a center of the columnar plasma in the direction that the columnar plasma extends.

Abstract: A sliding member has a base material whose surface is at least partially covered with a DLC film, wherein an intermediate layer is interposed between the base material and the DLC film, and the intermediate layer has a multilayer structure obtained by stacking a first Cr layer, a CrN layer and a second Cr layer successively from the side closer to the base material.

Abstract: A propeller shaft includes a first shaft and a second shaft. The first shaft has a torque transmission face in which a plurality of fine grooves extending in a first direction (face width direction) is formed. The second spline shaft is coupled to the first spline shaft so as to be movable relative to the first spline shaft in the axial direction of the first spline shaft, and has a torque transmission face in which a plurality of second fine grooves extending in a second direction that crosses the first direction is formed.