Measuring and testing – Tire – tread or roadway – Tire inflation testing installation
Reexamination Certificate
2007-06-26
2007-06-26
Allen, Andre J. (Department: 2855)
Measuring and testing
Tire, tread or roadway
Tire inflation testing installation
C340S445000
Reexamination Certificate
active
11336813
ABSTRACT:
In a vehicle tire air pressure detection system, a charging electromagnetic wave is transmitted for a predetermined period from a vehicle chassis side and stored as a charge voltage in a transmitter unit attached to a tire wheel. When the charge voltage reaches a predetermined level, a sensor in the transmitter unit detects a tire air pressure and a transmitter/receiver of the transmitter unit transmits a detection data on an electromagnetic wave in the same frequency band as the charging electromagnetic wave after the predetermined period from a time point at which the charge voltage has reached the predetermined level. Thus, interference between the charging electromagnetic wave and the electromagnetic wave of the detection data is prevented.
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Saito Hideki
Watabe Nobuya
Allen Andre J.
DENSO Corporation
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