Tire pressure monitoring system
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United States of America Patent
Stats
-
Mar 16, 1999
Grant Date -
N/A
app pub date -
Aug 29, 1997
filing date -
Sep 27, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Remote energy transmitting circuits 30, 35, 36, 37 sequentially transmit a first RF signal when activated by the controller 60. A remote unit 14 in the tire receives the first RF signal, and when the pressure in the tire is greater than a predetermined pressure, the remote unit 14 transmits a second RF signal. Via the remote receiver 20, the controller 60 determines whether the second RF signal is received within a predetermined time after transmitting the first RF signal. When the second RF signal is not received within the predetermined time, the controller 60 assumes a pressure detection failure and causes a display to indicate this condition.
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