Data processing: measuring – calibrating – or testing – Measurement system – Pressure
Reexamination Certificate
2007-04-24
2007-04-24
Bui, Bryan (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system
Pressure
C340S442000, C340S443000, C702S145000, C702S148000
Reexamination Certificate
active
11020303
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: detecting the rotational speed of each of the wheels; storing the rotational speed of wheels; determining a judgment value of decompression of tires based on the relative comparison of the rotational speed; storing the judgment value in a non-volatile memory; determining an average value obtained by a moving average of a certain number of the judgment value; and judging decompression of tires by comparing the average value with a threshold. Decompression of tires can be detected even if the traveling of a vehicle is repeated for a short time and the chance of judging the reduced pressure of tires is magnified to be able to enhance the safety of vehicle traveling.
REFERENCES:
patent: 6420966 (2002-07-01), Sugisawa
patent: 6788191 (2004-09-01), Kawasaki et al.
patent: 7-40717 (1995-02-01), None
patent: 9-203679 (1997-08-01), None
patent: 9-207528 (1997-08-01), None
patent: 2002-19435 (2002-01-01), None
patent: 2003-260910 (2003-09-01), None
Birch & Stewart Kolasch & Birch, LLP
Bui Bryan
Le John
Sumitomo Rubber Industries Ltd.
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