Abstract: Device (10) for vehicle driving evaluation comprising: A means (11) to obtain at least one physical parameter whereby it possible at any time to determine the value of the speed and instantaneous acceleration of a traveling vehicle; A calculation and comparison unit (12) whereby it is possible, from said physical parameter, to calculate an effective parameter that depends on said instantaneous acceleration and to compare said effective parameter with a reference parameter; A driving evaluation unit (13), whereby it is possible to generate a vehicle driving energy score by measuring the variance between said effective parameter and said reference parameter. Corresponding vehicle driving evaluation process.

Abstract: Device (10) for vehicle driving evaluation comprising: A means (11) to obtain at least one physical parameter whereby it possible at any time to determine the value of the speed and instantaneous acceleration of a traveling vehicle; A calculation and comparison unit (12) whereby it is possible, from said physical parameter, to calculate an effective parameter that depends on said instantaneous acceleration and to compare said effective parameter with a reference parameter; A driving evaluation unit (13), whereby it is possible to generate a vehicle driving energy score by measuring the variance between said effective parameter and said reference parameter. Corresponding vehicle driving evaluation process.

Abstract: A system and method are provided for monitoring the physical integrity of a tire. The system and method include measuring a signal proportional to the speed of rotation of the wheel and calculating a harmonic signal of the round of wheel (e.g., equal to the energies of the harmonics of this signal), then comparing the result with a threshold and activating an alarm when over-passing this threshold.

Abstract: When the tire reaches a limit of wear level, tire wear indicators generate an acoustic signal by knocking the ground. Magnetic, optical and mechanical versions exist. A detector made of a microphone located under the vehicle and a processing central unit switches on a warning included in the dashboard. In a more sophisticated version, the detector recognizes the incriminated wheel using the phase of the acoustic signal and the information from the ABS™. Application to the detection of the decay of a tire, or any other type of wear surface such as pad, or similar, and to the detection of the presence of snow chains or spikes.

Abstract: A system and method are provided for monitoring the physical integrity of a tire. The system and method include measuring a signal proportional to the speed of rotation of the wheel and calculating a harmonic signal of the round of wheel (e.g., equal to the energies of the harmonics of this signal), then comparing the result with a threshold and activating an alarm when over-passing this threshold.

Abstract: A safety insert designed to be mounted in an assembly comprising a tire and a rim of a vehicle and device for detecting the bearing of the tire on an insert, so that the insert generates signals oriented parallel to the axis of rotation of the tire and rim assembly and so that the device detects and analyzes the vibrating signals of the chassis of the vehicle.

Abstract: A system and method are provided for monitoring the physical integrity of a tire. The system and method include measuring a signal proportional to the speed of rotation of the wheel and calculating a harmonic signal of the round of wheel (e.g., equal to the energies of the harmonics of this signal), then comparing the result with a threshold and activating an alarm when over-passing this threshold.

Abstract: A method of detection of a run-flat condition of a vehicle tire, said tire being mounted on a wheel, wherein: a quantity f(?, t) is sensed, which varies which the angular displacement of the wheel in time; measuring signals are elaborated, which vary with the angular speed of the wheel d?(t)/dt; a quantity characteristic of the dispersion of measuring signals is calculated; an alarm is set off when the characteristic quantity satisfies a given ratio.

Abstract: A method of detection of a run-flat condition of a vehicle tire, said tire being mounted on a wheel, wherein: a quantity f(?, t) is sensed, which varies which the angular displacement of the wheel in time; measuring signals are elaborated, which vary with the angular speed of the wheel d?(t)/dt; a quantity characteristic of the dispersion of measuring signals is calculated; an alarm is set off when the characteristic quantity satisfies a given ratio.

Abstract: A method of detection of a run-flat condition of a vehicle tire, said tire being mounted on a wheel, wherein: a quantity f(?, t) is sensed, which varies which the angular displacement of the wheel in time; measuring signals are elaborated, which vary with the angular speed of the wheel d?(t)/dt; a quantity characteristic of the dispersion of measuring signals is calculated; an alarm is set off when the characteristic quantity satisfies a given ratio.

Abstract: According to the invention the method, and the system or corresponding device, consist in measuring a signal proportional to the speed of rotation of the wheel and in calculating a harmonic signal of the round of wheel (rather equal to the energies of the harmonics of this signal) then in comparing the result with a threshold and in activating an alarm when over-passing this threshold.

Abstract: A safety insert designed to be mounted in an assembly comprising a tire and a rim of a vehicle and device for detecting the bearing of the tire on an insert, so that the insert generates signals oriented parallel to the axis of rotation of the tire and rim assembly and so that the device detects and analyzes the vibrating signals of the chassis of the vehicle.

Abstract: The invention concerns a method whereby when the tyre reaches a wear threshold level, acoustic wear indicators emit a sound signal by coming into contact with the ground. Magnetic, optical and mechanical embodiments are also disclosed. A detector consisting of a microphone placed beneath the vehicle and a processing unit switches on an indicator placed in the instrument panel. In a more sophisticated version, the detector by matching the acoustic signal phase with the ABS data, identifies the tyre concerned. The invention is useful for detecting tyre deterioration, or that of any, other type of surface such as pads, and the like, and for detecting the presence of snow chains or nails.

Abstract: A safety insert is designed to be mounted in an assembly including a tire and a rim of a vehicle, so that on bearing of the tire against the insert, the insert will generate multiple vibrating signals of the rotation frequency of the tire. In one embodiment, the vibrating signals are generated by a variation of at least one of the outer radius and radial stiffness as a function of azimuth &agr;, which presents at least four maxima distributed in at least twice two different values M1 and M2.

Abstract: A safety insert designed to be mounted in an assembly comprising a tire and a rim of a vehicle and device for detecting the bearing of the tire on an insert, so that the insert generates signals oriented parallel to the axis of rotation of the tire and rim assembly and so that the device detects and analyzes the vibrating signals of the chassis of the vehicle.

Abstract: A safety insert designed to be mounted in an assembly comprising a tire and a rim of a vehicle and device for detecting the bearing of the tire on an insert, so that the insert generates signals oriented parallel to the axis of rotation of the tire and rim assembly and so that the device detects and analyzes the vibrating signals of the chassis of the vehicle.

Abstract: A method of detection of a run-flat condition of a vehicle tire, said tire being mounted on a wheel, wherein: