Abstract: The invention concerns a method for determining the running condition of a member rotating on a surface. The method includes an initial process of performing a spatial frequency analysis of the rotational speed of the member to identify at least one frequency window not including a harmonic of the revolution of the member wherein a law determining the running condition is established, and thereafter, an iterative process for determining the running condition including measuring the rotational speed V of the member; spatially sampling the speed with a constant spatial sampling period ?d; and analyzing the sampled signal in the frequency window identified so as to determine the running condition on the basis of the established law.

Abstract: A sealing device for an antifriction bearing includes a fixed support and a rotating support, the sealing device comprising a metal frame designed to be associated with a support of the bearing and a sealing joint, the frame including an annular seat and, secured to the seat, electronic identifying means consisting of a transponder connected on a communication antenna, wherein the antenna has an at least semi-annular or annular shape which is designed to be urged opposite the seat, the identifying means being secured to the seat via an insulating material layer which is interposed between the antenna and the seat so as to provide electromagnetic insulation for the antenna.

Abstract: A bump stop device comprises a bearing 20 provided with two bottom 22 and top 24 metal washers between which rolling bodies 26 are arranged. A friction ring 34 is fixed to the first of the bottom and top metal washers and rubs against the other metal washer in order to create a static frictional torque that is greater than that of the rolling bodies and, in practice, greater than 1 Nm. The friction ring 34 makes it possible to generate a controlled resisting torque that limits the transmission to the steering column of the torque generated when driving the vehicle on a convex road.

Abstract: A roller bearing includes a plurality of conical roller bodies arranged between inner and outer rings, and a cage having an annular sectional body mounted between the inner and outer rings. The annular sectional body further having an annular oil thrower located on each transverse side, each oil thrower having internal and external radial projections, wherein the free end of each projection is positioned opposite and away from a corresponding one of the inner and outer rings. The bearing has functional axial and radial clearances between the internal and external radial projections and the internal and outer rings. The clearances facilitate the passage of a bearing lubrication fluid there through and form an obstacle to the passage of solid particles.

Abstract: A suspension stop for a suspension strut of a vehicle equipped with a coil spring (10) comprises a rigid thrust bearing (24) equipped with a lower metal washer (28) rotating with respect to an upper metal washer (26), a synthetic material support part (38) designed to transmit the forces exerted by the spring to the lower washer and a cover (22) covering the upper washer and delimiting together with the support part a housing (54) for the bearing. The cover is equipped with a skirt (22) delimiting with the peripheral area of the support part an annular labyrinth (60), arranged radially outside the housing and connecting the housing to the outside, with the annular labyrinth successively comprising, from the housing towards the outside, an initial annular head loss of radial play P1, a second annular head loss of axial play P2, followed by a third annular head loss of radial play P3.

Abstract: The invention concerns a system for determining the position of mobile element relative to a stationary structure, the system comprising an encoder configured to emit a pseudo-sinusoidal spatial signal representing the position of the encoder, a sensor (2) comprising a current-loop mount between at least two resistive elements (3) and a signal processing device Vi configured to supply two quadrature signals respectively SIN and COS of same amplitude. The invention also concerns an antifriction bearing equipped with such a system for determining the angular position of the rotating ring relative to the stationary ring.

Abstract: The invention relates to a bearing comprising at least one system for determining the amplitude A of the pseudo-sinusoidal deformations of an area of the fixed race that are induced during rotation, the said system comprising at least three strain gauges (7), a device for measuring three signals Vi depending respectively on the temporal variations of the signal emitted by each gauge (8), the said device being able to form two signals SIN and COS respectively of like angle and like amplitude, and a device for calculating the amplitude A of the deformations of the area (7) as a function of time, the said device being designed to calculate the expression SIN2+COS2 so as to deduce the amplitude A therefrom.

Abstract: A bearing which includes at least one system for determining an amplitude of pseudo-sinusoidal deformations induced during rotation of a fixed ring within a zone, wherein the system includes four strain gauges spaced equally apart from each other within the zone, a device for measuring four signals based on time variations of a signal emitted by each gauge and for forming two signals for the same angle and amplitude, and a device for computing the time-dependent amplitude A of the zone deformations for calculating an expression such that the amplitude is derived therefrom.

Abstract: The system for determining the absolute angular position ? of a steering wheel (1) of a motor vehicle with respect to the chassis thereof comprises a device for incrementally measuring the relative angular position ? of the steering wheel, a device (2) for measuring the differential velocity ?V/V of the wheels mounted on the same axle and a processing device (8) for sampling the angular positions and differential velocities at a period t. Said device comprises computing means suitable to determine at moments tn: the estimate ?*(tn) of an absolute angular position ?(tn) according to the differential velocity ?V/V, the mean difference offset(tn) between the angular positions ?*(tn) and ?(ti), wherein i is a variant ranging from 0 to n and the absolute angular position ?(tn) by the addition between the mean difference offset(tn) and the angular position ?(tn).

Abstract: A magnetoresistive sensor for measuring the strength of a magnetic filed includes a stack of a reference element, a separation element and an element sensitive to the magnetic field. The reference element and the sensitive element have, respectively, a first and a second magnetic anisotropy in a first and a second direction. The sensitive element includes the superposition of a layer of a ferromagnetic material and a layer of an antiferromagnetic material which are arranged to obtain a magnetic moment having a component oriented in the direction of the field to be measured that varies reversibly in relation to the strength of the magnetic field to be measured, and linearly in an adjustable field range.

Abstract: The invention relates to a roller bearing with conical roller bodies (4), arranged between inner (1) and outer rings (2) and a cage with an annular sectional body (5) and an annular deflector body (10) for the body (5) to each transverse side, each deflector (10) comprising internal (11) and external (12) radial projections, the free end of each projection (11, 12) bering arranged opposing and at a separation from the corresponding ring (1, 2) such that the bearing has functional axial and radial play (13) between the projections (11, 12) and the rings (1, 2), Said play is such as to permit the passage of a bearing librication fluid and to form an obstacle to the passage of solid particules. The invention further relates to a cage for assembly in such a roller bearing.

Abstract: The invention relates to a method for determining the absolute angular position ? of a steering wheel (2) of a motor vehicle with respect to the chassis thereof comprising an initial procedure for determining whether a detected binary sequence is non-repetitive and, if yes, to test whether an estimate makes it possible to discriminate the absolute angular position of a encoder (1) in the case when the binary sequence is non-repetitive on a sector and to discriminate the absolute angular position of the steering wheel (2) ?2 corresponding to said non-repetitive binary sequence; if no, to test whether an estimate makes it possible to discriminate the absolute angular position ?3 of the steering wheel corresponding to said binary sequence.

Abstract: A system for determining at least one parameter of at least one member (1) rotating with respect to a fixed structure (2), includes, for each rotating member (1), an assembly includes a transponder (3), a coder (5), an absolute position sensor (6) and a device (4) for detecting the parameter or parameters issuing from the transponder (3). The system also includes an activation device (7) which is connected to each sensor (6) and to each detection device (4), the activation device being able, according to the absolute position of the coder, to activate the detection device (4) of an assembly when the transponder (3) of the assembly is in the transmission/reception cone of the antenna of the detection device.

Abstract: The invention concerns a system for determining at least one parameter of at least one member (1) rotating with respect to a fixed structure (2), comprising, for each rotating member (1), an assembly comprising a transponder (3), a code (5) comprising a reference singularity, a sensor (6) able to deliver a signal comprising a reference pulse corresponding to the detection of the reference singularity, a device (4) for detecting the parameter or parameters issuing from the transponder (3) and a device for measuring the speed of rotation of the rotating member (1); the said system also comprising an activation device (7) which is connected to each sensor (6), to each detection device (4) and to each speed measurement device, the said activation device being able, when a reference pulse issuing from the sensor (6) of an assembly is recorded, to activate the detection device (4) of the assembly at a moment which is a function of the indexed position of the transponder (3) and of the measured speed, so that the tr

Abstract: A roller bearing for the rotational guidance of a motor vehicle wheel, the bearing comprising a rotating inner member, a fixed outer member and rolling bodies allowing their relative rotation about an axis. The inner member includes a bore on the periphery of which flutes are provided so as to allow the rotational coupling of a fluted shaft with the internal member. The bearing has a path forming an air passage having an outer channel and an inner channel designed to pass right through respectively each of the members, in which, in combination, the path has a groove formed by the omission of at least the front part of at least one flute, from an intermediate zone of the bore as far as its front face. The downstream end of the inner channel opens out in the groove.

Abstract: A system for determining the absolute torque applied to a rotating shaft includes a sensitive element that is deformable under torsion and a measuring device having first and second coders that are intended to be rotationally fixed, respectively, in the vicinity of each end of the sensing element. The coders have a singularity or several equally distributed singularities; first and second fixed sensors disposed opposite to and at an air gap which is a predetermined distance from, respectively, the first and second coders, wherein each sensor is able to deliver a signal having a pulse corresponding to the detection of a singularity of the coder. The system also includes a device for processing the signals transmitted by the sensors that is able to calculate the angular difference between the singularities in order to determine, by comparison with a calibration difference, the absolute torque applied.

Abstract: A system for determining at least one parameter of at least one member rotating with respect to a fixed structure, the system including, for each rotating member, an assembly having a transponder, a coder, a position sensor, and a device for detecting the parameter or parameters issuing from the transponder. The system also includes a synchronisation unit connected to each sensor and to each detection device. The synchronisation unit including a device for determining an activation position of the detection device of an assembly when the transponder of the assembly is in the transmission/reception cone of the communication mechanism of the detection device, and an activation device that is able, by comparing the position of the coder with the activation position, to activate the detection device of the assembly in order to measure the parameter or parameters.

Abstract: The invention concerns a suspension stop for a motor vehicle wheel, comprising a device for measuring the forces applied to the vehicle wheel, the said device comprising at least one deformation sensor (12) which is associated with a fixed member (1, 6) of the said stop so as to measure the deformations of the said member which are caused by the said forces applied, and a calculation means able, from these deformations, to calculate the corresponding forces applied.

Abstract: The system for determining the absolute angular position ? of a steering wheel (1) of a motor vehicle with respect to the chassis thereof comprises a device for incrementally measuring the relative angular position ? of the steering wheel, a device (2) for measuring the differential velocity ? V/V of the wheels mounted on the same axle and a processing device (8) for sampling the angular positions and differential velocities at a period t. Said device comprises computing means suitable to determine at moments tn: the estimate ?* (tn) of an absolute angular position ?(tn) according to the differential velocity ? V/V, the mean difference offset(tn) between the angular positions ?* (tn) and ? (ti), wherein i is a variant ranging from 0 to n and the absolute angular position ?(tn) by the addition between the mean difference offset(tn) and the angular position ?(tn).

Abstract: An actuating system having an electric motor that is controlled by a computer as a function of a setpoint position of a member that is to be actuated. The actuating system includes an encoder that is dependent on the movement of the motor, a sensor designed to deliver two square digital position signals in quadrature and which are representative of the position of the encoder, a device for processing the signals and which can determine the actual position of the encoder, and a device for comparing the actual position of the encoder with the position of the encoder that corresponds, in theory, to the applied setpoint. The actuating system can be used to actuate a member and/or actuate a device that meters the amount of fuel provided to a heat engine.