Method of detecting a deflated tire on a vehicle

Details Method of detecting a deflated tire on a vehicle Method of detecting a deflated tire on a vehicle

1991-12-04

1993-09-28

Woodiel, Donald O.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

731462, 364565, B60C 2300

Patent

active

052489574

ABSTRACT:
A method of detecting a deflated tire on a vehicle by comparing the rolling radii of the tires by comparing angular velocity speed signals from wheel speed sensors. One wheel speed sensor being provided at each wheel. Before the comparison of the signals is carried out, corrected wheel speed signals for each of the second, third and fourth wheels are calculated giving corrections for a set of factors comprising vehicle speed, lateral acceleration and longitudinal (fore/aft) acceleration. The corrections each comprise a constant for the factor concerned times the respective factor. The set of constants for each wheel is derived by taking the vehicle through a range of speeds, lateral and fore/aft accelerations and using multiple regression techniques and the respective factors are calculated from the set of uncorrected wheel speed signals so that comparison of the wheel speeds can be made without false signals from tire deflections caused by speed, lateral or fore/aft acceleration induced tire deflections.

REFERENCES:
patent: 4876528 (1989-10-01), Walker et al.

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