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

1991-01-28

1993-08-24

Black, Thomas G.

Boots, shoes, and leggings

731465, 340442, 340444, B60C 2300

Patent

active

052394697

ABSTRACT:
A method of detecting a partially deflated pneumatic tire on a vehicle having four tires each mounted on a wheel including the steps of sensing the angular velocity of each wheel and producing a signal proportional thereto, processing the four signals in a processing unit which subtracts the sum of the signals from one pair of diagonally opposite wheels from the sum of the signals from the other pair of diagonally opposite wheels, sensing when the magnitude of the result is between 0.05% and 0.6% of the mean of the two sums to produce a signal factor and when said signal factor is present operating a warning device to indicate a tire is partially or completely deflated wherein the angular velocity of each wheel is measured simultaneously by a pulse generator providing a digital signal of more than twenty pulses per revolution of the wheel and a second signal of a single pulse per revolution of the wheel and the two angular velocity signals are both used. The method may also compare the signal for each wheel with the average of all four wheels and if the difference is greater than 0.1%, a deflation is indicated for allowing the detection of which wheel is deflated. Multi-pulse and single pulse detection may be selected according to speed and both may be used simultaneously.

REFERENCES:
patent: 3613075 (1971-10-01), Griffiths et al.
patent: 3691524 (1972-09-01), Frost et al.
patent: 4224597 (1980-09-01), DiCecio
patent: 4355298 (1982-10-01), Jessup
patent: 4876528 (1989-10-01), Walker et al.

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