Tire pressure monitoring system
First Claim
Patent Images
1. A method of monitoring tire pressure in a tire of a vehicle, comprising:
- receiving input indicative of a tire pressure reading in the tire;
receiving input indicative of an ambient pressure;
comparing a difference of the tire pressure reading and the ambient pressure reading with a predetermined threshold;
if the difference is less than the predetermined threshold, then activating a warning indicator visible to an operator of the vehicle.
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Abstract
A system and method for monitoring tire pressure in a tire of a vehicle is described, in which a tire pressure reading in the tire and an ambient pressure reading are received, and a warning indicator visible to an operator of a vehicle is selectively activated based on the tire pressure reading, the ambient pressure reading, and a predetermined threshold. In one embodiment, the ambient pressure is used by an engine control system for regulating the air-fuel intake, transmitted to a communications bus, and used by a tire pressure monitoring subsystem configured for receiving the ambient pressure reading from the communications bus.
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Citations
20 Claims
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1. A method of monitoring tire pressure in a tire of a vehicle, comprising:
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receiving input indicative of a tire pressure reading in the tire; receiving input indicative of an ambient pressure; comparing a difference of the tire pressure reading and the ambient pressure reading with a predetermined threshold; if the difference is less than the predetermined threshold, then activating a warning indicator visible to an operator of the vehicle. - View Dependent Claims (2, 3, 4)
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5. A method of monitoring tire pressure in a tire of a vehicle, comprising:
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receiving input indicative of a tire pressure reading in the tire; receiving input indicative of an ambient pressure; comparing the tire pressure reading with a sum of the ambient pressure reading and a predetermined threshold; if the tire pressure reading is less than the sum, then activating a warning indicator visible to an operator of the vehicle. - View Dependent Claims (6, 7, 8)
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9. An automotive system comprising:
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a communications bus; a tire pressure sensor disposed within a tire for measuring a tire pressure; an ambient pressure sensor for measuring an ambient pressure; an engine control system for regulating air fuel intake based on the ambient pressure and transmitting an indication of the ambient pressure to the communications bus; and a tire pressure monitoring system configured for; receiving input indicative of the tire pressure from the tire pressure sensor, receiving the indication of the ambient pressure from the communications bus; and selectively activating a warning indicator visible to an operator of a vehicle based on the tire pressure, the ambient pressure, and a predetermined threshold. - View Dependent Claims (10, 11, 12)
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13. A computer-readable medium bearing instructions for operating an tire pressure sensor system, said instructions being arranged, upon execution thereof, to cause one or more processors to perform the steps of:
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receiving input indicative of tire pressure from a tire pressure sensor, receiving an indication of the ambient pressure from a communications bus; and selectively activating a warning indicator visible to an operator of a vehicle based on the tire pressure, the ambient pressure, and a predetermined threshold. - View Dependent Claims (14, 15, 16, 17)
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18. A computer-readable medium bearing instructions for operating an engine control system, said instructions being arranged, upon execution thereof, to cause one or more processors to perform the steps of:
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reading an ambient pressure value from a pressure sensor; controlling a mixture of fuel and an oxidant based on the ambient pressure value; and transmitting the ambient pressure value to a communications bus. - View Dependent Claims (19)
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20. A method for upgrading a tire pressure monitoring system of a vehicle comprising:
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installing first instructions in a computer-readable medium accessible to an engine control system, said first instructions being arranged, upon execution thereof, to cause one or more processors to transmit an indication of ambient pressure to a communications bus; and installing second instructions in a computer-readable medium accessible to an engine control system, said second instructions being arranged, upon execution thereof, to cause one or more processors to perform the steps of; receiving the indication of the ambient pressure from a communications bus; and selectively activating a warning indicator visible to an operator of a vehicle based on a tire pressure of a tire, the ambient pressure, and a predetermined threshold.
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Specification