Abstract: A method for providing a service linked to the condition and/or behavior of a vehicle and/or of a tire comprises the following steps: when a vehicle passes a road infrastructure equipped with a system for assessing the condition of a vehicle, determining an identifier of the vehicle and/or of a tire of the vehicle, at the same time, determining at least one parameter representative of the condition of the vehicle and/or of a component of the vehicle, transmitting the determined data to a remote data server, from the identification data, retrieving external data concerning the vehicle and/or the tire and/or the running conditions, combining the determined information with the external data such as to determine a relevant indicator concerning the condition and/or the behavior of a vehicle, and transmitting the relevant indicator to a provider of a service linked to the condition and/or to the behavior of a vehicle and/or of a tire.

Abstract: The method for organizing a group of several separate vehicles in a platoon includes an identification step (a) in order to identify the candidate vehicles that are to form the platoonp The method also includes an acquisition step (b) in order to acquire, for each candidate vehicle, at least one parameter associated with a tire of the candidate vehicle, such as the wet grip index of the tire tyre, referred to as the “tire parameter”. Subsequently, based on the tire parameter, a processing step (c) for determining the rank attributed to the particular candidate vehicle in the platoon and/or the inter-vehicle distance which, at a given speed, must separate the candidate vehicle in question from the vehicle immediately in front in the platoon.

Abstract: The method for organizing a group of several separate vehicles in a platoon includes an identification step (a) in order to identify the candidate vehicles that are to form the platoonp The method also includes an acquisition step (b) in order to acquire, for each candidate vehicle, at least one parameter associated with a tire of the candidate vehicle, such as the wet grip index of the tire tyre, referred to as the “tire parameter”. Subsequently, based on the tire parameter, a processing step (c) for determining the rank attributed to the particular candidate vehicle in the platoon and/or the inter-vehicle distance which, at a given speed, must separate the candidate vehicle in question from the vehicle immediately in front in the platoon.

Abstract: A method for providing a service linked to the condition and/or behavior of a vehicle and/or of a tire comprises the following steps: when a vehicle passes a road infrastructure equipped with a system for assessing the condition of a vehicle, determining an identifier of the vehicle and/or of a tire of the vehicle, at the same time, determining at least one parameter representative of the condition of the vehicle and/or of a component of the vehicle, transmitting the determined data to a remote data server, from the identification data, retrieving external data concerning the vehicle and/or the tire and/or the running conditions, combining the determined information with the external data such as to determine a relevant indicator concerning the condition and/or the behavior of a vehicle, and transmitting the relevant indicator to a provider of a service linked to the condition and/or to the behavior of a vehicle and/or of a tire.

Abstract: A system for assessing the condition of a vehicle comprises: a subsystem for measuring the condition of at least one tire of the vehicle, a subsystem for reading identification data of a tire and/or of the vehicle, and a subsystem for transmitting measured data and identification data to a remote database, the three subsystems being installed in one or more casings designed to be installed on or near a road infrastructure, at least one of the casings being designed to be installed in a mandatory travel zone of the road infrastructure.

Abstract: Vehicle stability control system, the system including means for imparting a longitudinal force on the tire and means for calculating the slip parameter GOpt at each activation of the means for imparting a longitudinal force on the tire in the following manner: as the values of Gi are acquired, calculating the variation in G with respect to time, as long as the variation is above a low threshold, calculating coefficients A[wet, p] by direct calculation or by an appropriate regression so as to model variation in G with respect to time by a variation curve which is a function of (Gi, A[wet, p]), as soon as the variation is greater than a high threshold, determining a target slip GCwet using at least the last values of A[wet, p].

Abstract: System for controlling the stability of a vehicle, the system comprising means for imparting a longitudinal force to the tire and means for calculating a slip GOpt by determining the values of the coefficient of friction ?i, for each slip Gi corresponding to successive levels “i”, using in parallel “n” calculation algorithms each determining a target value of the slip making it possible thus to obtain as many target values GCn as there are algorithms used, the system selecting the best of the target values GCn as the optimum slip value GOpt by subjecting the “n” target values GCn to comparisons aimed at eliminating the least likely target values, the comparisons being made on the basis of a function f(?) of a descriptor of the physical functioning of the rotation of the tire on the ground making it possible to calculate characteristic values. For example, one interesting characteristic value is the variation in G with respect to time.

Abstract: System for controlling the stability of a vehicle, the system comprising means for imparting a longitudinal force on the tire and means for calculating the slip parameter GOpt at each activation of the means for imparting a longitudinal force on the tire in the following manner: determining coefficients A[avg/p] by direct calculation or by an appropriate regression, from a sufficient number of pairs (?i, Gi), so as to model a first curve of variation ?i=f(Gi, A[avg/p]) including the origin, and the pair or pairs (?i, Gi), in which ?i is different from zero, determining an indicator of the average slope ?1 of the first variation curve, determining coefficients B[avg/p] by direct calculation or by an appropriate regression, from a sufficient number of pairs (?i, Gi), so as to model a second variation curve, free not to pass through the origin, ?i=f(Gi, B[avg/p]) including the pair or pairs (?i, Gi), in which ?i is different from zero, determining an indicator of the average slope ?2 of the second variation curv

Abstract: A system is presented for controlling the stability of a vehicle. The system includes a controller using a slip parameter GOPT corresponding to a predetermined value of the coefficient of friction ? or a controller maintaining the functioning of the tire at an optimal value ?OPT of the drift angle corresponding to the maximum value of the draft thrust Ftarget. The controller performs the following operations (where X is either the slip G or the drift angle ?, and Y is either ? or F). Estimations or measurements are determined for at least one pair of values (Xi, Yi). The corresponding values of the slope ?i are determined for the straight line passing through the origin (Xi, Yi). Coefficients Ap are calculated by direct calculation or by a regression from a sufficient number of pairs with (?i, Xi) so as to model a variation curve ?i=f(Xi, Ap). A target value XTarget is calculated by using a predetermined invariant “Invt”.

Abstract: Vehicle stability control system, the system comprising means for imparting a longitudinal force on the tire and means for calculating the slip parameter GOpt at each activation of the means for imparting a longitudinal force on the tire in the following manner: as the values of Gi are acquired, calculating the variation in G with respect to time, as long as the variation is above a low threshold, calculating coefficients A[wet, p] by direct calculation or by an appropriate regression so as to model variation in G with respect to time by a variation curve which is a function of (Gi, A[wet, p]), as soon as the variation is greater than a high threshold, determining a target slip GCwet using at least the last values of A[wet, p].

Abstract: System for controlling the stability of a vehicle, the system comprising means for imparting a longitudinal force to the tire and means for calculating a slip GOpt by determining the values of the coefficient of friction ?i, for each slip Gi corresponding to successive levels “i”, using in parallel “n” calculation algorithms each determining a target value of the slip making it possible thus to obtain as many target values GCn as there are algorithms used, the system selecting the best of the target values GCn as the optimum slip value GOpt by subjecting the “n” target values GCn to comparisons aimed at eliminating the least likely target values, the comparisons being made on the basis of a function f(?) of a descriptor of the physical functioning of the rotation of the tire on the ground making it possible to calculate characteristic values. For example, one interesting characteristic value is the variation in G with respect to time.

Abstract: System for controlling the stability of a vehicle, the system comprising means for imparting a longitudinal force on the tire and means for calculating the slip parameter GOpt at each activation of the means for imparting a longitudinal force on the tire in the following manner: determining coefficients A[avg/p] by direct calculation or by an appropriate regression, from a sufficient number of pairs (?i, Gi), so as to model a first curve of variation ?i=f(Gi, A[avg/p]) including the origin, and the pair or pairs (?i, Gi), in which ?i is different from zero, determining an indicator of the average slope ?1 of the first variation curve, determining coefficients B[avg/p] by direct calculation or by an appropriate regression, from a sufficient number of pairs (?i, Gi), so as to model a second variation curve, free not to pass through the origin, ?i=f(Gi, B[avg/p]) including the pair or pairs (?i, Gi), in which ?i is different from zero, determining an indicator of the average slope ?2 of the second variation curv

Abstract: An automatic control method is provided for a phenomenon in which a parameter Y varies as a function of a parameter X according to a course exhibiting a rise, an extremum and a fall, in which the value of the parameter X is automatically controlled to maintain the value of a parameter Y at an optimum value, including the following steps. Estimations or measurements (Xi, Yi) are determined for at least one pair of values in a coordinate system having an origin. Corresponding values are determined for the slope ?i of the straight line passing through the origin and through (Xi, Yi). Coefficients Ap are calculated by direct calculation or by a regression from a sufficient number of pairs with (?i, Xi) so as to model a variation curve ?i=f(Xi, Ap). A target value XTarget is calculated by using a predetermined Invariant “Invt”.

Abstract: A method for controlling the functioning of a tire includes the steps of determining estimations or measurements of the slip Gi and the coefficient of friction ?i prevailing at such slip for at least one pair “i” of values (Gi, ?i); determining the corresponding values of the slope ?i of the straight line passing through the origin and through each pair (Gi, ?i); calculating a coefficient B by direct calculation or by a regression from a sufficient number of pairs of (?i, Gi) so as to estimate the value of slope ?0 at the origin; and using ?0 in an indicator of the longitudinal stiffness of the tread pattern.

Abstract: A method for controlling the functioning of a tire includes the steps of determining estimations or measurements of the slip Gi and the coefficient of friction &mgr;i prevailing at such slip for at least one pair “i” of values (Gi, &mgr;i); determining the corresponding values of the slope &agr;i of the straight line passing through the origin and through each pair (Gi, &mgr;i); calculating a coefficient B by direct calculation or by a regression from a sufficient number of pairs of (&agr;i, Gi) so as to estimate the value of slope &agr;0 at the origin; and using &agr;0 in an indicator of the longitudinal stiffness of the tread pattern.

Abstract: A system for controlling the stability of a vehicle having tires, the system including a controller using at least the parameter slip GOpt corresponding to a predetermined value of the coefficient of friction &mgr;, or the system including a controller maintaining the functioning of the tire at an optimum value &dgr;Opt of the drift angle corresponding to the maximum value of the drift thrust Ftarget, the controller including means for performing the following operations (where X is either the slip G or the drift angle &dgr;, and Y is either &mgr; or F):

Abstract: Automatic control method for a phenomenon of which a parameter Y varies as a function of a parameter X according to a course exhibiting a rise, an extremum and a fall, in which the value of the parameter X is automatically controlled to maintain the value of a parameter Y at an optimum value, comprising the following steps: