Tire pressure sensor system with improved power saving

Details Tire pressure sensor system with improved power saving Tire pressure sensor system with improved power saving

2007-03-16

2008-05-27

Allen, Andre J. (Department: 2855)

Measuring and testing

Tire, tread or roadway

Tire inflation testing installation

C340S442000

Reexamination Certificate

active

07377158

ABSTRACT:
A battery powered vehicle tire pressure sensor system has a power saving unit which controls the application of electrical power to the system as a function of tire speed to prolong battery life. The power saving unit has a power control switch which is responsive to tire angular speed. Each sensor assembly of the system is mounted on or in the side wall of a pneumatic tire to generate signals representative of tire pressure whenever power is applied. A processor periodically samples the signals. When the processor determines that the tire pressure is outside a safe range, an r.f. generator is activated by the processor to generate an unsafe tire pressure signal. This signal is converted by a receiver to a warning for the driver.

REFERENCES:
patent: 3697944 (1972-10-01), Murano
patent: 5838229 (1998-11-01), Robinson, III
patent: 6111520 (2000-08-01), Allen et al.
patent: 7000462 (2006-02-01), Hillenmayer et al.

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