Tire pressure loss detection
First Claim
Patent Images
1. A method of detecting the tire pressure loss in a vehicle, comprising:
- detecting torsional vibrations of one or more wheels of the vehicle to produce an angular frequency spectrum in an angular frequency domain;
eliminating pole pitch errors in the angular frequency spectrum;
mapping a peak frequency from the angular frequency spectrum in the angular frequency domain to a time frequency domain;
determining if the peak frequency in the time frequency domain changes over time;
relating frequency changes to pressure loss in one or more tires associated with the one or more wheels; and
indicating the pressure loss to the driver of the vehicle.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention is directed to monitoring the loss of pressure in one or more tires by detecting the angular speed variations of one or more wheels of the vehicle over a specified wheel revolution period and analyzing the vibration of the speed various. Changes in the frequency are related to pressure loss, which is indicated to the driver, for example, by displaying the tire pressure loss information on a display.
-
Citations
14 Claims
-
1. A method of detecting the tire pressure loss in a vehicle, comprising:
-
detecting torsional vibrations of one or more wheels of the vehicle to produce an angular frequency spectrum in an angular frequency domain; eliminating pole pitch errors in the angular frequency spectrum; mapping a peak frequency from the angular frequency spectrum in the angular frequency domain to a time frequency domain; determining if the peak frequency in the time frequency domain changes over time; relating frequency changes to pressure loss in one or more tires associated with the one or more wheels; and indicating the pressure loss to the driver of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification