System for monitoring the pressure of tires of a motor vehicle

Details System for monitoring the pressure of tires of a motor vehicle System for monitoring the pressure of tires of a motor vehicle

2005-07-26

2005-07-26

Trieu, Van T. (Department: 2636)

Communications: electrical

Land vehicle alarms or indicators

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

C340S447000

Reexamination Certificate

active

06922140

ABSTRACT:
According to one exemplary embodiment, a system for monitoring the pressure of tires of a motor vehicle with location of the wheels comprises a monitoring element and a pressure sensor. Each pressure sensor is associated with a transmitter with which it transmits to the monitoring element a radio signal comprising sensor identification data. The system comprises a means for determining the phase shift between two radio signals transmitted at two distinct times for each wheel. The system further comprises a means for determining the rotation angle, modulo 2π, traveled by each of the wheels between the two times. The system further comprises a means for comparison between the phase shifts and the rotation angles.

REFERENCES:
patent: 5661651 (1997-08-01), Geschke et al.
patent: 6046672 (2000-04-01), Pearman
patent: 6218937 (2001-04-01), Delaporte
patent: 6259361 (2001-07-01), Robillard et al.
patent: 6420996 (2002-07-01), Stopczynski et al.
patent: 6435020 (2002-08-01), Oldenettel et al.
patent: 6662642 (2003-12-01), Breed et al.
patent: 6690271 (2004-02-01), Fischer et al.

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