Measuring and testing – Tire – tread or roadway – Tire inflation testing installation
Patent
1987-03-17
1989-02-28
Woodiel, Donald O.
Measuring and testing
Tire, tread or roadway
Tire inflation testing installation
73728, 340 58, B60C 2302, G01L 706, G01L 910
Patent
active
048074683
ABSTRACT:
An on-board tire pressure indicating system comprises for each tire of a vehicle, a receiver disposed adjacent the rotating wheel on which the tire is mounted. On the wheel is a transmitter which comprises three magnets, spaced apart in a general circumferential sense, and lying on essentially the same radius. As the wheel rotates, the magnets repeatedly sweep past the receiver, which generates a pulse at the passage of each magnet. Two of the three magnets are disposed in a predetermined fixed circumferential spacing on the wheel. The third magnet is selectively positioned in a circumferential sense relative to the other two magnets in accordance with the pressure in the tire. The time between the two fixed magnet pulses corresponds to a reference measurement dimension while the time between the selectively positioned magnet's pulse and the one of the two fixed magnet's pulse corresponds to an inflation pressure measurement dimension. The ratio of the two measurement dimensions is essentially independent of the rotational speed of the wheel and tire. The signals from the sensor are supplied to electronic circuitry which performs the ratio of the sensed inflation measurement dimension to the sensed reference measurement dimension, and it is this ratio which is indicative of the actual inflation pressure. The electronics operates on a multiplex basis, sampling each wheel sensor in a repetitive sequence.
REFERENCES:
patent: 4119944 (1978-10-01), Smith
patent: 4330774 (1982-05-01), Doty
patent: 4597286 (1986-07-01), Aguglia
Telemagnetics, Inc.
Woodiel Donald O.
LandOfFree
On-board tire pressure indicating system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with On-board tire pressure indicating system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On-board tire pressure indicating system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1357665