Aktiebolaget Skf

Marco Cambiano

Simone Baliva

Alessandro Ferrero

Alessandro Garrone

Maurizio Bertola

Carmelo Gulli

Igor Dorrestijn

Alessandro Galeazzi

Sensorised wheel hub unit and a method for detecting, in real time, forces and moments applied to an outer ring of the wheel hub unit in which piezoresistive ceramic plates are made of one piece with welded metal plates housed within respective recesses formed in an outer surface of the outer ring over respective races for rolling elements that there is a gap between the plates and a base wall of each recess; the temperature of the outer ring and the amplitude and frequency of first electrical signals (S) associated with the sensors relating to the same race are analysed to determine a frequency value equal to the frequency of the first signal having the maximum amplitude and as many amplitude values (D-Dn) as there are sensors associated with that race and each equal to the maximum amplitude of the first signal from each sensor, corrected according to temperature.

Sensorised wheel hub unit for vehicles, associated system and method for detecting final loads on wheels

A method and system for detecting forces and moments acting on a vehicle wheel, wherein an outer ring of a wheel hub unit has a plurality of strain sensors configured to generate first signals (Ds) proportional to mechanical stresses on the outer ring and a temperature sensor generating a second signal (Ds). Further, the detection system comprises a second processing unit configured to process third signals (Dv) corresponding to selected vehicle state parameters; and a third processing unit that receives the third signals and the pseudo-sinusoidal signal and calculates said forces and moments on the vehicle wheel.

Associated system and method for detecting the final loads on a vehicle wheel by means of a sensorized wheel hub unit

Sensorised wheel hub unit and a method for detecting, in real time, forces and moments applied to an outer ring of the wheel hub unit in which piezoresistive ceramic plates are made of one piece with welded metal plates housed within respective recesses formed in an outer surface of the outer ring over respective races for rolling elements that there is a gap between the plates and a base wall of each recess; the temperature of the outer ring and the amplitude and frequency of first electrical signals (S) associated with the sensors relating to the same race are analysed to determine a frequency value equal to the frequency of the first signal having the maximum amplitude and as many amplitude values (D1-Dn) as there are sensors associated with that race and each equal to the maximum amplitude of the first signal from each sensor, corrected according to temperature.

In a vehicle suspension assembly a sensorized system applied to a wheel hub unit, in which radially outer cylindrical surface of an outer ring of the wheel hub unit configured for coupling to a suspension upright or knuckle has four circumferential flats formed to be angularly spaced from each other on the radially outer lateral cylindrical surface, each flat delimiting a plane surface which extends axially over a pair of annular tracks for rolling bodies of the outer ring; each flat carries integrally a sensor module including a pair of extensometers positioned parallel to each other and each at the position of a respective annular track, orientated in a circumferential direction so as to extend along a circumferential development of the annular track; an electrical circuit picks up a signal from each sensor module and sends it to a data socket carried by the suspension upright or knuckle.

Sensorized suspension assembly for vehicles, including a wheel hub unit and a suspension upright or knuckle, and an associated method and wheel hub unit

Sensorised wheel hub unit and a method for detecting, in real time, forces and moments applied to an outer ring of the wheel hub unit in which piezoresistive ceramic plates are made of one piece with welded metal plates housed within respective recesses formed in an outer surface of the outer ring over respective races for rolling elements in such a way that there is a gap between the plates and a base wall of each recess; in which the temperature of the outer ring and the amplitude and frequency of first electrical signals (S) associated with the sensors relating to the same race are analysed to determine a frequency value equal to the frequency of the first signal having the maximum amplitude and as many amplitude values (D-Dn) as there are sensors associated with that race and each equal to the maximum amplitude of the first signal from each sensor, corrected according to the temperature.

Growing community of inventors

Cumiana, Italy

Marco Cambiano