METHOD AND APPARATUS FOR DETERMINING TIRE CONDITION USING IDEAL GAS LAW
First Claim
1. An apparatus for determining a tire operating condition comprising:
- a tire-based sensor for sensing tire pressure and temperature and transmitting a signal indicative thereof;
a vehicle ignition system;
a vehicle-based receiver/controller for receiving the signal from the tire-based sensor and for detecting the state of the vehicle ignition system, said controller providing an error signal when the sensed tire pressure is less than a set threshold value Pset and resetting the error signal when the sensed tire pressure is greater than a reset threshold value Prst, the vehicle-based receiver/controller determining the set threshold value Pset and the reset threshold value Prst as a function of a calculated warm tire pressure value Pwarm, determining a mole value N of the tire pressure and adjusting the determined set threshold value Pset and the reset threshold value Prst in response to the vehicle ignition state and a change in the determined mole value N; and
a display the displaying the error signal from the vehicle-based receiver/controller.
3 Assignments
0 Petitions
Accused Products
Abstract
An apparatus is provided for determining a tire operating condition including a tire-based sensor for sensing tire pressure and temperature and transmitting a signal indicative thereof and a vehicle ignition system. A vehicle-based receiver/controller is provided for receiving the signal from the tire-based sensor and for detecting the state of the vehicle ignition system. The controller provides an error signal when the sensed tire pressure is less than a set threshold value Pset and resets the error signal when the sensed tire pressure is greater than a reset threshold value Prst. The receiver/controller determines the set threshold value Pset and the reset threshold value Prst as a function of a calculated warm tire pressure value Pwarm, determines a mole value N of the tire pressure, and adjusts the determined set threshold value Pset and the reset threshold value Prst in response to the vehicle ignition state and a change in the determined mole value N. A display is provided for displaying the error signal from the vehicle-based receiver/controller.
-
Citations
12 Claims
-
1. An apparatus for determining a tire operating condition comprising:
-
a tire-based sensor for sensing tire pressure and temperature and transmitting a signal indicative thereof; a vehicle ignition system; a vehicle-based receiver/controller for receiving the signal from the tire-based sensor and for detecting the state of the vehicle ignition system, said controller providing an error signal when the sensed tire pressure is less than a set threshold value Pset and resetting the error signal when the sensed tire pressure is greater than a reset threshold value Prst, the vehicle-based receiver/controller determining the set threshold value Pset and the reset threshold value Prst as a function of a calculated warm tire pressure value Pwarm, determining a mole value N of the tire pressure and adjusting the determined set threshold value Pset and the reset threshold value Prst in response to the vehicle ignition state and a change in the determined mole value N; and a display the displaying the error signal from the vehicle-based receiver/controller. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for determining a tire operating condition comprising the steps of:
-
sensing tire pressure; sensing tire temperature; providing a signal indicative of the sensed tire pressure and tire temperature; sensing a state of the a vehicle ignition system; providing an error signal when the sensed tire pressure is less than a set threshold value Pset; resetting the error signal when the sensed tire pressure is greater than a reset threshold value Prst; calculating warm tire pressure value Pwarm determining the set threshold value Pset and the reset threshold value Prst as a function of the calculated warm tire pressure value Pwarm; determining a mole value N of the tire pressure; adjusting the determined set threshold value Pset and the resent threshold value Prst in response to the vehicle ignition state and a change in the determined mole value N; and displaying the provided error signal for the vehicle operator. - View Dependent Claims (8, 9, 10, 11, 12)
-
Specification