Abstract:
A tire intended to be mounted on a drop-center rim with a flange height G and a radius of curvature R1 has first and second beads each having an annular reinforcing structure having a radially innermost point, the radial distance between the radially innermost point and the mounting rim being A, and a carcass reinforcement anchored in the two beads by being turned back around the annular reinforcing structure forming, within each bead, a main strand and a turned-back strand, in which the thicknesses EB1 of the first bead and EB2 of the second bead are the distance separating (i) the point on the main strand that is at a distance R from the radially innermost point, where R=G+(R1)/2−A, and (ii) the point on the exterior surface of the bead that is at the distance R from the radially innermost point, and in which |EB1−EB2|≧1 mm.
Abstract:
A tire intended to be mounted on a drop-center rim with a flange height G and a radius of curvature R1, comprising a first and a second bead, each comprising at least one annular reinforcing structure having a radially innermost point, the radial distance between the radially innermost point and the mounting rim being denoted by A; a carcass reinforcement anchored in the two beads by being turned back around the annular reinforcing structure so as to form, within each bead, a main strand and a turned-back strand, in which the first bead has a thickness EB1 and the second bead has a thickness EB2, the thicknesses EB1 and EB2 defined as the distance separating (i) the point on the main strand that is at a distance R from said point, where R=G+R1/2−A, and (ii) the point on the exterior surface of the bead that is at this same distance R from said point, and in which the absolute value of the difference between the thicknesses EB1 and EB2 is greater than or equal to 1 mm.
Abstract:
A method is provided for characterizing a straight-line behavior of a given vehicle that includes at least one suspension device. For a given value of a parameter that when varied modifies a friction generated in each suspension device, the method includes steps of: applying a stress cycle to each suspension device so as to identify a friction present in each suspension device; determining, for each suspension device, a value of an indicator relating to the friction; repeating the applying step and the determining step by varying the parameter so as to obtain a variation of the indicator as a function of the parameter; and for each suspension device, determining an interval of a value of the parameter in which the indicator is greater than a predetermined threshold for the given vehicle.
Abstract:
An effort transmitted between a vehicle wheel and a wheel support is determined by mounting a tire/wheel assembly for rotation on a wheel support having a dynamic hub rigidly connected on a fixed frame such that the only degree of freedom of the assembly is rotation about the hub axis. The tire is pressed against an excitation device and the resulting fixed support effort transmitted between the wheel and the wheel support is measured. On the basis of the measured fixed support effort, there is calculated a suspended support effort which would be transmitted between the wheel and a wheel support having a degree of freedom of suspension in at least one direction (X, Y, Z) in relation to the excitation device.
Abstract:
A method is provided for characterising a straight-line behaviour of a given vehicle that includes at least one suspension device. For a given value of a parameter that when varied modifies a friction generated in each suspension device, the method includes steps of:applying a stress cycle to each suspension device so as to identify a friction present in each suspension device;determining, for each suspension device, a value of an indicator relating to the friction;repeating the applying step and the determining step by varying the parameter so as to obtain a variation of the indicator as a function of the parameter; andfor each suspension device, determining an interval of a value of the parameter in which the indicator is greater than a predetermined threshold for the given vehicle.
Abstract:
A method for determining effort transmitted between the wheel of a vehicle and a wheel support, comprising the following steps: the wheel (36) is pivotably mounted in a wheel support (27), said wheel being provided with a tyre; the tyre is pressed against means of excitation (29); a fixed support effort (F SF ) which is transmitted between the wheel and the wheel support when the tyre is excited with the means of excitation is measured, wherein the wheel support (27) is fixed in at least one direction in relation to the means of excitation. The invention is characterised by a step consisting in calculating (37) a suspended effort (F SS ), which is transmitted between the wheel and the wheel support (30), having a degree of freedom of suspension in at least one direction in relation to the means of excitation.
Abstract translation:一种用于确定在车辆车轮和车轮支撑件之间传递的作用的方法,包括以下步骤:轮(36)可枢转地安装在车轮支撑件(27)中,所述车轮设有轮胎; 轮胎按压激励装置(29); 测量当利用激励手段激励轮胎时在车轮和车轮支撑件之间传递的固定支撑力(F SF SP>),其中车轮支撑件(27)至少固定 与激励手段相关的一个方向。 本发明的特征在于包括计算(37)在车轮和车轮支撑件(30)之间传递的具有悬挂自由度的悬挂力(F SS SP>)的步骤 相对于激励装置的至少一个方向。