Method and device for tire monitoring on a vehicle
First Claim
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1. 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.
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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.
32 Citations
7 Claims
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1. Method for monitoring a tire on a vehicle, comprising the steps of:
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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. - View Dependent Claims (2, 3)
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4. Device for monitoring a tire on a vehicle, comprising:
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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. - View Dependent Claims (5, 6, 7)
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Specification