Device for monitoring the air pressure of a tire in motor vehicl

Details Device for monitoring the air pressure of a tire in motor vehicl Device for monitoring the air pressure of a tire in motor vehicl

1994-09-02

1996-08-13

Swarthout, Brent A.

Communications: electrical

Land vehicle alarms or indicators

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

340443, 340447, 731465, B60C 2300

Patent

active

055460704

ABSTRACT:
In a device for monitoring tire air pressure in motor vehicles with a sensor that delivers a signal corresponding to the deformation of the tire, and with an evaluating unit that detects the signal from the sensor, the sensor is so designed such that it delivers an electrical pulse corresponding to the degree of deformation of a tire, especially deformation during a footprint pass. The evaluating unit determines the degree of deformation as a function of the height of the amplitude of the pulse or the evaluating unit determines the degree of deformation as a function of the ratio of the duration of the pulse to the duration of one wheel revolution.

REFERENCES:
patent: 4210898 (1980-07-01), Betts
patent: 4220907 (1980-09-01), Pappas et al.
patent: 4862486 (1989-08-01), Wing et al.
patent: 5274355 (1993-12-01), Galan
Technische Rundschau entitled "Muskeln der Elektronik--Piezopower" by Von Daniel J. Jendritza und Hartmut Janocha, Heft 41, 1992, pp. 38-44.

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