Method and device for tire monitoring on a vehicle
AssigneeMercedes-Benz AG
InventorHorst Wehinger
Life of this patent
Estimating the term…
Abstract
The invention provides a method and apparatus for monitoring tires on a vehicle to detect adverse tire operating states, by continuously measuring the distance between the associated vehicle axle (or a vehicle body part rigidly connected thereto) and the road while the vehicle is in operation. From this measurement, the tire deflection is determined, which represents a comparatively exact measure of the respective tire load. When the tire deflection determined leaves a predetermined desired range, a warning signal is transmitted.
Claims7
Method for monitoring a tire on a vehicle, comprising the steps of:
- while the vehicle is in operation, measuring continuously a distance between one of an associated vehicle axle and a vehicle body part rigidly connected thereto, and the road;
- determining separately for each tire a value for tire deflection based on measured distance values;
- providing predetermined desired range for tire deflection as a function of at least vehicle speed and vehicle load;
- transmitting a warning signal when determined tire deflection leaves the desired range;
- and
- to assess the total tire stress, retrievably storing a time profile of tire deflection values determined separately for each tire, at least during operating phases when said tire deflection is outside the predetermined desired range.
Device for monitoring a tire on a vehicle, comprising:
- a distance-measuring sensor assembly for measuring a distance between one of an associated vehicle axle and a vehicle body part rigidly connected thereto, and the road;
- and
- an evaluation unit for determining tire deflection based on distance measurement values obtained from the distance-measuring sensor assembly, said evaluation unit comprising a microprocessor, in which a predetermined desired range for tire deflection is stored as a function of at least vehicle speed and vehicle load, and which transmits a warning signal when determined tire deflection exceeds the desired range;
- wherein to assess total tire stress, a time profile of determined tire deflection values is retrievably stored separately for each tire, at least when determined tire deflection exceeds the desired range for the relevant tire.
Dependencies are inferred from the claim text.