Method and apparatus for tire pressure monitoring and for shared

Details Method and apparatus for tire pressure monitoring and for shared Method and apparatus for tire pressure monitoring and for shared

1994-03-10

1995-10-31

Peng, John K.

Communications: electrical

Land vehicle alarms or indicators

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

340539, 340444, 340445, 340447, 731463, B60C 2300

Patent

active

054633745

ABSTRACT:
Vehicle tires each contain a sender including a microprocessor, a radio transmitter, a pressure detector and a magnetic switch for sending a radio signals indicating sender ID, pressure data and change of switch state. An on-board receiver unit having a microprocessor evaluates the transmitted data and displays pressure condition information. A portable magnet is placed near each tire, in turn, to operate the magnetic switches, resulting in a sequential transmission of sender ID codes which allows the receiver unit to learn the tire position of each sender. An inertia switch in the tire triggers a radio transmission and the receiver unit considers the absence of a transmission when expected as a failure and displays a service needed message. A remote portable sender transmits signals for door unlocking or locking, trunk opening and interior light control. The receiver unit responds to the signals and issues commands to appropriate actuators.

REFERENCES:
patent: 4163208 (1979-07-01), Merz
patent: 5109213 (1992-04-01), Williams
patent: 5285189 (1994-02-01), Nowicki et al.
patent: 5289369 (1994-02-01), Hirshberg
Popular Mechanics-Mar. 1973, vol 139 No. 3-P. 129.

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