In a pushbelt for a continuously variable transmission that includes at least one endless carrier and a number of transverse segments, which are mounted on the endless carrier. The transverse segments include a bearing surface that contacts the radial inside of the endless carrier, as well as a convexly curved tilting edge that is a part of a main body surface of the transverse segment. According to the present disclosure the convex curvature of the tilting edge extends both radially inward or below and radially outward or above the bearing surface, at least as seen in radial or height direction relative to the endless carrier.

In a pushbelt for a continuously variable transmission that includes at least one endless carrier and a number of transverse segments, which are mounted on the endless carrier. The transverse segments include a bearing surface that contacts the radial inside of the endless carrier, as well as a convexly curved tilting edge that is a part of a main body surface of the transverse segment. According to the present disclosure the convex curvature of the tilting edge extends both radially inward or below and radially outward or above the bearing surface, at least as seen in radial or height direction relative to the endless carrier.

Disclosed is a method for operating a continuously variable transmission including two pulleys, each defining an effectively V-shaped circumference groove of variable width, a drive belt, wrapped around the pulleys, and a cooling system, which cooling system is provided with a controller for supplying a controlled amount of a cooling agent to the drive belt. The controller is arranged to supply at least a minimum amount of the cooling agent to the drive belt during operation of the transmission.

Disclosed is a method for operating a continuously variable transmission including two pulleys, each defining an effectively V-shaped circumference groove of variable width, a drive belt, wrapped around the pulleys, and a cooling system, which cooling system is provided with a controller for supplying a controlled amount of a cooling agent to the drive belt. The controller is arranged to supply at least a minimum amount of the cooling agent to the drive belt during operation of the transmission.

Elements of a transmission belt wound around pulleys of a continuously variable transmission each include a body part, a pair of pillar parts, and a pair of side surfaces. The pair of side surfaces each include a first side surface formed on a corresponding one of the pillar parts; and a second side surface formed so as to continue from the first side surface, and located more on an inner circumference side than the first side surface. A pair of the first side surfaces each are formed so as to be inclined toward an inner side of a corresponding one of the pillar parts with respect to an extending direction, from an inner circumference side to an outer circumference side of a ring, of a corresponding one of the second side surfaces continuing from the first side surface, and a pair of the second side surfaces is formed such that the second side surfaces are spaced farther apart from each other as the second side surfaces extend from the inner circumference side to the outer circumference side, and that an angle formed between the pair of the second side surfaces is larger by 0.2 to 0.8 degrees than an opening angle of V-shaped grooves of the pulleys.

Elements of a transmission belt wound around pulleys of a continuously variable transmission each include a body part, a pair of pillar parts, and a pair of side surfaces. The pair of side surfaces each include a first side surface formed on a corresponding one of the pillar parts; and a second side surface formed so as to continue from the first side surface, and located more on an inner circumference side than the first side surface. A pair of the first side surfaces each are formed so as to be inclined toward an inner side of a corresponding one of the pillar parts with respect to an extending direction, from an inner circumference side to an outer circumference side of a ring, of a corresponding one of the second side surfaces continuing from the first side surface, and a pair of the second side surfaces is formed such that the second side surfaces are spaced farther apart from each other as the second side surfaces extend from the inner circumference side to the outer circumference side, and that an angle formed between the pair of the second side surfaces is larger by 0.2 to 0.8 degrees than an opening angle of V-shaped grooves of the pulleys.

In a transmission belt of a continuously variable transmission, a plurality of types of elements having different shapes is arrayed. A ratio of the numbers of the respective types of the elements in a string portion of the transmission belt is set so that, when first and second pulleys of the continuously variable transmission are misaligned, a total sum of deformation volumes of end portions of the elements on a side closer to a virtual plane in the element width direction is smaller than a total sum of deformation volumes of end portions of the elements on a side farther from the virtual plane. The virtual plane passes a center of a space between sheaves of the second pulley and is perpendicular to a rotating shaft of the second pulley.

In a transmission belt of a continuously variable transmission, a plurality of types of elements having different shapes is arrayed. A ratio of the numbers of the respective types of the elements in a string portion of the transmission belt is set so that, when first and second pulleys of the continuously variable transmission are misaligned, a total sum of deformation volumes of end portions of the elements on a side closer to a virtual plane in the element width direction is smaller than a total sum of deformation volumes of end portions of the elements on a side farther from the virtual plane. The virtual plane passes a center of a space between sheaves of the second pulley and is perpendicular to a rotating shaft of the second pulley.

Disclosed is a steel whose composition includes specified wt % of: Ni, Mo, Co, Mo+Co+Si+Mn+Cu+W+V+Nb+Zr+Y+Ta+Cr+C+Al+B+Ti+N, Ni+Co+Mo, Al, Ti, N, Si, Mn, C, S, P, B, H, O, Cr, Cu, W, Zr, Ca, Mg, Nb, V, Ta, Y, the remainder being iron and impurities resulting from production. The inclusion population, observed by image analysis on a polished surface of 650 mm.sup.2 if the steel is in the form of a hot-formed part or a hot-rolled sheet and 800 mm.sup.2 if the steel is in the form of a cold-rolled sheet, does not include non-metal inclusions of an equivalent diameter greater than 10 m. Also disclosed are a product created from the steel, and a manufacturing method.

Disclosed is a steel whose composition includes specified wt % of: Ni, Mo, Co, Mo+Co+Si+Mn+Cu+W+V+Nb+Zr+Y+Ta+Cr+C+Al+B+Ti+N, Ni+Co+Mo, Al, Ti, N, Si, Mn, C, S, P, B, H, O, Cr, Cu, W, Zr, Ca, Mg, Nb, V, Ta, Y, the remainder being iron and impurities resulting from production. The inclusion population, observed by image analysis on a polished surface of 650 mm.sup.2 if the steel is in the form of a hot-formed part or a hot-rolled sheet and 800 mm.sup.2 if the steel is in the form of a cold-rolled sheet, does not include non-metal inclusions of an equivalent diameter greater than 10 m. Also disclosed are a product created from the steel, and a manufacturing method.