Automatic wireless tire pressure monitoring system
First Claim
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1. An automatic vehicle tire pressure monitoring system comprising:
- a pressure sensitive actuator mounted on the wheel of said vehicle;
means for generating a magnetic field mounted on said wheel and adjustable by said pressure sensitive actuator when the pressure in said vehicle tire changes;
an electromagnetic coil located on the chassis of said vehicle so that an electromagnetic potential is generated within the coil by said magnetic field;
a transmitter connected to said electromagnetic coil, said transmitter receiving its power from said electromagnetic coil; and
magnetic field sensors on the chassis of said vehicle, said sensors being responsive to said magnetic field and connected to said transmitter so that said transmitter transmits signals representing tire pressure.
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Abstract
A tire pressure sensor is connected to a radio frequency transmitter which transmits signals to the operator station representing the condition of the vehicle'"'"'s tires. The transmitter receives its power from an electromagnetic coil energized by rotation of the vehicle'"'"'s wheel. In one embodiment, the coil is mounted on the vehicle'"'"'s wheel and a magnet is mounted on the chassis so that rotation of the wheel energizes the RF transmitter.
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Citations
14 Claims
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1. An automatic vehicle tire pressure monitoring system comprising:
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a pressure sensitive actuator mounted on the wheel of said vehicle; means for generating a magnetic field mounted on said wheel and adjustable by said pressure sensitive actuator when the pressure in said vehicle tire changes; an electromagnetic coil located on the chassis of said vehicle so that an electromagnetic potential is generated within the coil by said magnetic field; a transmitter connected to said electromagnetic coil, said transmitter receiving its power from said electromagnetic coil; and magnetic field sensors on the chassis of said vehicle, said sensors being responsive to said magnetic field and connected to said transmitter so that said transmitter transmits signals representing tire pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An automatic vehicle tire pressure monitoring system comprising:
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a tire pressure sensor; a radio frequency transmitter, said tire pressure sensor being connected to said transmitter; an electromagnetic potential generating means including a permanent magnet and an electromagnetic coil, one being mounted on the wheel of said vehicle, and the other being fixed to the chassis of said vehicle at locations spaced from the axis of rotation of said wheel so that said generating means is energized by the rotation of the vehicle wheel, said generating means being connected to said transmitter to supply power thereto. - View Dependent Claims (11, 12, 13, 14)
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Specification