Method and apparatus for detecting the presence of an at least partially deflated tire on a motor vehicle
First Claim
1. A method of detecting the presence of at least one at least partially deflated tire on a motor vehicle with four wheels, comprising the steps of:
- detecting angular velocity of each wheel and generating corresponding velocity signals or data, andprocessing the velocity signals or data in processing means arranged forcalculating value of a predetermined function of the ratio or of the difference between the product of the angular velocities of two diagonally opposed wheels and the product of the angular velocities of the other two wheels, andgenerating a warning signal when difference between values of the function and of a first static reference value correspond to a normal inflation condition of the tires exceeds a predetermined value, or when difference between values of the function and of a second reference value determined upon each departure of the motor vehicle and corresponding to the actual inflation condition of the tires upon departure of the motor vehicle exceeds a predetermined value.
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Accused Products
Abstract
The method of detecting a partially deflated tire includes the steps of detecting the angular velocity of each wheel and generating corresponding velocity signals or data, processing the velocity signals or data in a processing unit arranged for calculating the value of a predetermined function of the ratio or of the difference between the product of the angular velocities of two diagonally opposed wheels and the product of the angular velocities of the other two wheels, and generating a warning signal when the difference between the values of this function and a first static reference value corresponding to a normal inflation condition of the tires exceeds a predetermined value, or when the difference between the values of this function and a second reference value determined upon each departure of the motor vehicle and corresponding to the actual inflation condition of the tires upon departure of the motor vehicle exceeds a predetermined value.
18 Citations
12 Claims
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1. A method of detecting the presence of at least one at least partially deflated tire on a motor vehicle with four wheels, comprising the steps of:
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detecting angular velocity of each wheel and generating corresponding velocity signals or data, and processing the velocity signals or data in processing means arranged for calculating value of a predetermined function of the ratio or of the difference between the product of the angular velocities of two diagonally opposed wheels and the product of the angular velocities of the other two wheels, and generating a warning signal when difference between values of the function and of a first static reference value correspond to a normal inflation condition of the tires exceeds a predetermined value, or when difference between values of the function and of a second reference value determined upon each departure of the motor vehicle and corresponding to the actual inflation condition of the tires upon departure of the motor vehicle exceeds a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Apparatus for detecting the presence of at least one at least partially deflated tire on a motor vehicle with four wheels comprising:
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sensor means for supplying velocity signals or data indicative of angular velocity of each wheel, and electronic processing means connected to the sensor means and arranged for calculating value of a predetermined function of the ratio or of the difference between the product of the angular velocities of two diagonally opposed wheels and the product of the angular velocities of the other two wheels, and generating a warning signal when difference between the values of function and of a first static reference value corresponding to a normal inflation condition of the tires exceeds a predetermined value, or when difference between values of the function and a second reference value determined upon each departure of the motor vehicle and corresponding to the actual inflation condition of the tires upon departure of the motor vehicle exceeds a predetermined value. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification