Device for monitoring the air pressure of pneumatic tires of vehicles
First Claim
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1. Device for monitoring the air pressure in the air chamber of pneumatic tires of vehicles comprising:
- a pressure measuring system arranged on a vehicle wheel which registers the pressure in the air chamber of the tire and emits a representative electrical pressure signal for the pressure value;
a transmitter arranged on a vehicle wheel which receives the issued pressure signal from the pressure measuring system and sends an appropriate pressure send signal out;
a receiver arranged at a distance from a vehicle wheel which receives the signal transmitted by the transmitter;
as well as an antenna which is not integrated in the transmitter, but rather while being in electrical connection with the transmitter, is arranged independently therefrom in the wheel,wherein said transmitter comprises a stand-by mode, in which said pressure send signal is sent out to said receiver at predetermined time intervals andwherein a monitor is provided in said transmitter which switches said transmitter in an active send mode when the pressure in the tire drops by a pressure gradient above a predetermined value.
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Abstract
A device for monitoring the air pressure of pneumatic tires of vehicles having a pressure measuring system arranged on the vehicle wheel, the measured values of which are transmitted by means of a transmitter to a receiver, whereby each vehicle wheel is preferably associated with a receiver. The transmitters have a transmitting antenna which is fixed in relation to the wheel and is not integrated into the transmitter. The transmitter is preferably an antenna with several windings which are vulcanized in the side flanks or into the tread of the tire.
84 Citations
30 Claims
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1. Device for monitoring the air pressure in the air chamber of pneumatic tires of vehicles comprising:
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a pressure measuring system arranged on a vehicle wheel which registers the pressure in the air chamber of the tire and emits a representative electrical pressure signal for the pressure value; a transmitter arranged on a vehicle wheel which receives the issued pressure signal from the pressure measuring system and sends an appropriate pressure send signal out; a receiver arranged at a distance from a vehicle wheel which receives the signal transmitted by the transmitter; as well as an antenna which is not integrated in the transmitter, but rather while being in electrical connection with the transmitter, is arranged independently therefrom in the wheel, wherein said transmitter comprises a stand-by mode, in which said pressure send signal is sent out to said receiver at predetermined time intervals and wherein a monitor is provided in said transmitter which switches said transmitter in an active send mode when the pressure in the tire drops by a pressure gradient above a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification