Device for detecting underinflation of a tire and for measuring

Details Device for detecting underinflation of a tire and for measuring Device for detecting underinflation of a tire and for measuring

1984-01-20

1985-07-30

Woodiel, Donald O.

Communications: electrical

Selective

Having indication or alarm

731465, 731468, B60C 2302, G01L 914

Patent

active

045324930

ABSTRACT:
Device for detecting the underinflation of a motor vehicle tire (1) serving also as a device for measuring the kinetic state of the wheel, characterized by the fact that it comprises in combination: a toothed wheel turning with the wheel (1) of the vehicle and whose electrical characteristics of at least one (6a) of the teeth (6) are modified by a pressure drop in one of the tires, an electromagnet (10) fixed to rotate and constituting an electromagnetic sensor in which the toothed wheel (4) generates a signal formed from successive pulses, and a computer (23) which computes the values of the successive periods, and which interprets their variation as an acceleration or deceleration or else as a state of underinflation of the tire according to the behavior of this variation.

REFERENCES:
patent: 2040375 (1936-05-01), Guthrie
patent: 3832681 (1974-08-01), Kaida et al.
patent: 4016753 (1977-03-01), Willenbecher
patent: 4180795 (1979-12-01), Matsuda et al.
patent: 4348654 (1982-09-01), Matsuda et al.

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