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...

2005-09-20

2005-09-20

Oen, William (Department: 2855)

Measuring and testing

Tire, tread or roadway

C340S444000

Reexamination Certificate

active

06945102

ABSTRACT:
A method for detecting decrease in internal pressure of a tire mounted to a vehicle on the basis of rotational information obtained from the tire. The method includes the steps of: detecting the rotational information of the respective tires; storing the rotational information of the respective tires; calculating a front and rear wheel ratio which can be obtained on the basis of rotational information of both front wheels and rotational information of both rear wheels of the vehicle; calculating a driving wheel torque of the vehicle; and obtaining a value of the front and rear wheel ratio when the driving wheel torque is zero on the basis of a relationship between the front and rear wheel ratio and the driving wheel torque. It is possible to shorten the time for obtaining effective front and rear wheel ratios.

REFERENCES:
patent: 5589815 (1996-12-01), Nishihara et al.
patent: 5839801 (1998-11-01), Ferguson
patent: 0 768 193 (1997-04-01), None
patent: 0 908 331 (1999-04-01), None
patent: 2002-234317 (2002-08-01), None
patent: 2002-234320 (2002-08-01), None
patent: 2002-234321 (2002-08-01), None

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