Method and apparatus for detecting decrease in tire...

Details Method and apparatus for detecting decrease in tire... Method and apparatus for detecting decrease in tire...

2006-04-25

2006-04-25

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Tire, tread or roadway

C340S442000

Reexamination Certificate

active

07032442

ABSTRACT:
A method for detecting decrease in tire air-pressure includes the steps of: detecting rotational angular velocities of respective tires; calculating an initial correction coefficient for a ratio of right and left wheels; terminating initialization of a first stage at a point of time when the initial correction coefficient has been calculated for performing a provisional judgment of decompression; calculating an initial correction coefficient for a ratio of front and rear wheels; and terminating initialization of a second stage at a point of time when the initial correction coefficient has been calculated for performing normal judgement of decompression. Detection of decompression when performing running including mostly straight-ahead running such as driving in an urban area might be made at an early stage and at high accuracy to thereby improve the performance of the system.

REFERENCES:
patent: 5940781 (1999-08-01), Nakajima
patent: 1 203 675 (2002-05-01), None
patent: 10-909 (1998-01-01), None

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