Data processing: measuring – calibrating – or testing – Measurement system – Accelerometer
Reexamination Certificate
2008-04-22
2008-04-22
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system
Accelerometer
C702S138000, C702S050000, C702S098000
Reexamination Certificate
active
07363189
ABSTRACT:
A detection method of reducing the air pressure of tires based on the rotational speed of wheels mounted on a vehicle. The method includes steps of: determining the rotational speed of each wheel, memorizing the rotational speed of each wheel, determining the loading sensitivity of the dynamic load radius of tires caused by movement of a load during turning, comparing said loading sensitivity with the loading sensitivity of the dynamic load radii of tires at initialization which are preliminarily memorized, and judging decompression of tires based on the result of the comparison. Further, a loading sensitivity-calculating method of determining the loading sensitivity of the dynamic load radii of tires includes steps of: determining a lateral acceleration during turning of a vehicle, determining the shift rate of a judgment value which is the relative comparison of rotational speed of wheels on a pair of diagonals of a vehicle, and determining the loading sensitivity.
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Barlow John
Birch & Stewart Kolasch & Birch, LLP
Cherry Stephen J
Sumitomo Rubber Industries Ltd.
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