Importance

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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.

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First Claim