Method for alarming decrease in tire air-pressure and apparatus

Details Method for alarming decrease in tire air-pressure and apparatus Method for alarming decrease in tire air-pressure and apparatus

1999-04-02

2000-03-07

Hofsass, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340442, 340445, 73146, 731462, B60C 2300

Patent

active

060345950

ABSTRACT:
A method for alarming decrease in tire air-pressure in which the rotational speed of a tire is detected, it is determined whether air-pressure of the tire has decreased based on the detected rotational speed, and an alarm is generated when internal pressure of the tire has decreased, wherein an equation for calculating a determined value for detecting decompression of a tire through comparing a difference between two diagonal sums includes a correction term related to differences between tread widths of front and rear wheels of a vehicle. An apparatus performing the method is also disclosed. The method and apparatus improve the accuracy of determining decompression of air-pressure by incorporating a correction term related to differences in tread widths of a vehicle.

REFERENCES:
patent: 4773011 (1988-09-01), VanHoose
patent: 5323870 (1994-06-01), Parigger et al.
patent: 5578984 (1996-11-01), Nakajima
patent: 5710539 (1998-01-01), Iida
patent: 5721374 (1998-02-01), Siekkinen et al.
patent: 5936519 (1999-08-01), Nakajima et al.
patent: 5939626 (1999-08-01), Tominaga et al.

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